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_association(stcb->sctp_ep, stcb, m, iphlen,
416 src, dst, sh, op_err,
419 *abort_no_unlock = 1;
425 /* Only report the missing cookie parameter */
426 if (op_err != NULL) {
427 sctp_m_freem(op_err);
429 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
430 /* We abort with an error of missing mandatory param */
431 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
432 if (op_err != NULL) {
433 struct sctp_error_missing_param *cause;
435 SCTP_BUF_LEN(op_err) = len;
436 cause = mtod(op_err, struct sctp_error_missing_param *);
437 /* Subtract the reserved param */
438 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
439 cause->cause.length = htons(len);
440 cause->num_missing_params = htonl(1);
441 cause->type[0] = htons(SCTP_STATE_COOKIE);
443 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
444 src, dst, sh, op_err,
447 *abort_no_unlock = 1;
451 asoc->peer_supports_nat = (uint8_t)nat_friendly;
452 /* process the peer's parameters in the INIT-ACK */
453 if (sctp_process_init((struct sctp_init_chunk *)cp, stcb) < 0) {
454 if (op_err != NULL) {
455 sctp_m_freem(op_err);
457 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
458 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
459 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
460 src, dst, sh, op_err,
463 *abort_no_unlock = 1;
466 initack_limit = offset + ntohs(cp->ch.chunk_length);
467 /* load all addresses */
468 if ((retval = sctp_load_addresses_from_init(stcb, m,
469 offset + sizeof(struct sctp_init_chunk),
470 initack_limit, src, dst, NULL, stcb->asoc.port)) < 0) {
471 if (op_err != NULL) {
472 sctp_m_freem(op_err);
474 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
475 "Problem with address parameters");
476 SCTPDBG(SCTP_DEBUG_INPUT1,
477 "Load addresses from INIT causes an abort %d\n",
479 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
480 src, dst, sh, op_err,
483 *abort_no_unlock = 1;
486 /* if the peer doesn't support asconf, flush the asconf queue */
487 if (asoc->asconf_supported == 0) {
488 struct sctp_asconf_addr *param, *nparam;
490 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
491 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
492 SCTP_FREE(param, SCTP_M_ASC_ADDR);
496 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
497 stcb->asoc.local_hmacs);
499 sctp_queue_op_err(stcb, op_err);
500 /* queuing will steal away the mbuf chain to the out queue */
503 /* extract the cookie and queue it to "echo" it back... */
504 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
505 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
506 stcb->asoc.overall_error_count,
508 SCTP_FROM_SCTP_INPUT,
513 * Cancel the INIT timer, We do this first before queueing the
514 * cookie. We always cancel at the primary to assume that we are
515 * canceling the timer started by the INIT which always goes to the
518 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
519 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
521 /* calculate the RTO */
522 if (asoc->overall_error_count == 0) {
523 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
524 SCTP_RTT_FROM_NON_DATA);
526 stcb->asoc.overall_error_count = 0;
527 net->error_count = 0;
528 retval = sctp_send_cookie_echo(m, offset, initack_limit, stcb, net);
533 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
534 struct sctp_tcb *stcb, struct sctp_nets *net)
536 union sctp_sockstore store;
537 struct sctp_nets *r_net, *f_net;
540 uint16_t old_error_counter;
542 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
547 memset(&store, 0, sizeof(store));
548 switch (cp->heartbeat.hb_info.addr_family) {
551 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
552 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
553 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
554 store.sin.sin_port = stcb->rport;
555 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
556 sizeof(store.sin.sin_addr));
564 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
565 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
566 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
567 store.sin6.sin6_port = stcb->rport;
568 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
577 r_net = sctp_findnet(stcb, &store.sa);
579 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
582 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
583 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
584 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
586 * If the its a HB and it's random value is correct when can
587 * confirm the destination.
589 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
590 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
591 stcb->asoc.primary_destination = r_net;
592 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
593 f_net = TAILQ_FIRST(&stcb->asoc.nets);
594 if (f_net != r_net) {
596 * first one on the list is NOT the primary
597 * sctp_cmpaddr() is much more efficient if
598 * the primary is the first on the list,
601 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
602 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
606 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
607 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
608 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
609 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
610 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
612 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
613 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
614 stcb->asoc.overall_error_count,
616 SCTP_FROM_SCTP_INPUT,
619 stcb->asoc.overall_error_count = 0;
620 old_error_counter = r_net->error_count;
621 r_net->error_count = 0;
622 r_net->hb_responded = 1;
623 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
624 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
625 /* Now lets do a RTO with this */
626 sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
627 SCTP_RTT_FROM_NON_DATA);
628 if ((r_net->dest_state & SCTP_ADDR_REACHABLE) == 0) {
629 r_net->dest_state |= SCTP_ADDR_REACHABLE;
630 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
631 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
633 if (r_net->dest_state & SCTP_ADDR_PF) {
634 r_net->dest_state &= ~SCTP_ADDR_PF;
635 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
637 if (old_error_counter > 0) {
638 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
639 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
640 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
642 if (r_net == stcb->asoc.primary_destination) {
643 if (stcb->asoc.alternate) {
644 /* release the alternate, primary is good */
645 sctp_free_remote_addr(stcb->asoc.alternate);
646 stcb->asoc.alternate = NULL;
649 /* Mobility adaptation */
651 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
652 SCTP_MOBILITY_BASE) ||
653 sctp_is_mobility_feature_on(stcb->sctp_ep,
654 SCTP_MOBILITY_FASTHANDOFF)) &&
655 sctp_is_mobility_feature_on(stcb->sctp_ep,
656 SCTP_MOBILITY_PRIM_DELETED)) {
657 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
658 stcb->sctp_ep, stcb, NULL,
659 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
660 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
661 SCTP_MOBILITY_FASTHANDOFF)) {
662 sctp_assoc_immediate_retrans(stcb,
663 stcb->asoc.primary_destination);
665 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
666 SCTP_MOBILITY_BASE)) {
667 sctp_move_chunks_from_net(stcb,
668 stcb->asoc.deleted_primary);
670 sctp_delete_prim_timer(stcb->sctp_ep, stcb);
676 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
679 * Return 0 means we want you to proceed with the abort non-zero
680 * means no abort processing.
683 struct sctpasochead *head;
685 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
686 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
687 atomic_add_int(&stcb->asoc.refcnt, 1);
688 SCTP_TCB_UNLOCK(stcb);
689 SCTP_INP_INFO_WLOCK();
691 atomic_subtract_int(&stcb->asoc.refcnt, 1);
695 new_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
696 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
697 /* generate a new vtag and send init */
698 LIST_REMOVE(stcb, sctp_asocs);
699 stcb->asoc.my_vtag = new_vtag;
700 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
702 * put it in the bucket in the vtag hash of assoc's for the
705 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
706 SCTP_INP_INFO_WUNLOCK();
707 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
711 * treat like a case where the cookie expired i.e.: - dump
712 * current cookie. - generate a new vtag. - resend init.
714 /* generate a new vtag and send init */
715 LIST_REMOVE(stcb, sctp_asocs);
716 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
717 sctp_stop_all_cookie_timers(stcb);
718 sctp_toss_old_cookies(stcb, &stcb->asoc);
719 stcb->asoc.my_vtag = new_vtag;
720 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
722 * put it in the bucket in the vtag hash of assoc's for the
725 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
726 SCTP_INP_INFO_WUNLOCK();
727 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
734 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
735 struct sctp_nets *net)
738 * return 0 means we want you to proceed with the abort non-zero
739 * means no abort processing
741 if (stcb->asoc.auth_supported == 0) {
742 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
745 sctp_asconf_send_nat_state_update(stcb, net);
749 /* Returns 1 if the stcb was aborted, 0 otherwise */
751 sctp_handle_abort(struct sctp_abort_chunk *abort,
752 struct sctp_tcb *stcb, struct sctp_nets *net)
757 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
761 len = ntohs(abort->ch.chunk_length);
762 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
764 * Need to check the cause codes for our two magic nat
765 * aborts which don't kill the assoc necessarily.
767 struct sctp_error_cause *cause;
769 cause = (struct sctp_error_cause *)(abort + 1);
770 error = ntohs(cause->code);
771 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
772 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ABORT flags:%x\n",
773 abort->ch.chunk_flags);
774 if (sctp_handle_nat_colliding_state(stcb)) {
777 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
778 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ABORT flags:%x\n",
779 abort->ch.chunk_flags);
780 if (sctp_handle_nat_missing_state(stcb, net)) {
787 /* stop any receive timers */
788 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
789 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
790 /* notify user of the abort and clean up... */
791 sctp_abort_notification(stcb, true, false, error, abort, SCTP_SO_NOT_LOCKED);
793 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
794 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
795 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
796 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
798 #ifdef SCTP_ASOCLOG_OF_TSNS
799 sctp_print_out_track_log(stcb);
801 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
802 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
803 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
808 sctp_start_net_timers(struct sctp_tcb *stcb)
810 uint32_t cnt_hb_sent;
811 struct sctp_nets *net;
814 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
816 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
817 * If the dest in unconfirmed send a hb as well if under
818 * max_hb_burst have been sent.
820 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
821 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
822 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
823 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
824 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
829 sctp_chunk_output(stcb->sctp_ep, stcb,
830 SCTP_OUTPUT_FROM_COOKIE_ACK,
836 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
837 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
839 struct sctp_association *asoc;
840 int some_on_streamwheel;
843 SCTPDBG(SCTP_DEBUG_INPUT2,
844 "sctp_handle_shutdown: handling SHUTDOWN\n");
848 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
849 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
852 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
853 /* Shutdown NOT the expected size */
856 old_state = SCTP_GET_STATE(stcb);
857 sctp_update_acked(stcb, cp, abort_flag);
861 if (asoc->control_pdapi) {
863 * With a normal shutdown we assume the end of last record.
865 SCTP_INP_READ_LOCK(stcb->sctp_ep);
866 if (asoc->control_pdapi->on_strm_q) {
867 struct sctp_stream_in *strm;
869 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
870 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
872 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
873 asoc->control_pdapi->on_strm_q = 0;
874 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
876 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
877 asoc->control_pdapi->on_strm_q = 0;
880 panic("Unknown state on ctrl:%p on_strm_q:%d",
882 asoc->control_pdapi->on_strm_q);
886 asoc->control_pdapi->end_added = 1;
887 asoc->control_pdapi->pdapi_aborted = 1;
888 asoc->control_pdapi = NULL;
889 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
890 if (stcb->sctp_socket) {
891 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
894 /* goto SHUTDOWN_RECEIVED state to block new requests */
895 if (stcb->sctp_socket) {
896 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
897 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
898 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
899 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
901 * notify upper layer that peer has initiated a
904 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
907 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
910 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
912 * stop the shutdown timer, since we WILL move to
915 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
916 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
918 /* Now is there unsent data on a stream somewhere? */
919 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
921 if (!TAILQ_EMPTY(&asoc->send_queue) ||
922 !TAILQ_EMPTY(&asoc->sent_queue) ||
923 some_on_streamwheel) {
924 /* By returning we will push more data out */
927 /* no outstanding data to send, so move on... */
928 /* send SHUTDOWN-ACK */
929 /* move to SHUTDOWN-ACK-SENT state */
930 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
931 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
932 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
934 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
935 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
936 sctp_stop_timers_for_shutdown(stcb);
937 sctp_send_shutdown_ack(stcb, net);
938 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
939 stcb->sctp_ep, stcb, net);
940 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
941 sctp_send_shutdown_ack(stcb, net);
947 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
948 struct sctp_tcb *stcb,
949 struct sctp_nets *net)
951 struct sctp_association *asoc;
953 SCTPDBG(SCTP_DEBUG_INPUT2,
954 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
959 /* process according to association state */
960 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
961 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
962 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
963 sctp_send_shutdown_complete(stcb, net, 1);
964 SCTP_TCB_UNLOCK(stcb);
967 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
968 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
969 /* unexpected SHUTDOWN-ACK... so ignore... */
970 SCTP_TCB_UNLOCK(stcb);
973 if (asoc->control_pdapi) {
975 * With a normal shutdown we assume the end of last record.
977 SCTP_INP_READ_LOCK(stcb->sctp_ep);
978 asoc->control_pdapi->end_added = 1;
979 asoc->control_pdapi->pdapi_aborted = 1;
980 asoc->control_pdapi = NULL;
981 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
982 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
985 if (!TAILQ_EMPTY(&asoc->send_queue) ||
986 !TAILQ_EMPTY(&asoc->sent_queue) ||
987 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
988 panic("Queues are not empty when handling SHUTDOWN-ACK");
992 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
993 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
994 /* send SHUTDOWN-COMPLETE */
995 sctp_send_shutdown_complete(stcb, net, 0);
996 /* notify upper layer protocol */
997 if (stcb->sctp_socket) {
998 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
999 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1000 SCTP_SB_CLEAR(stcb->sctp_socket->so_snd);
1002 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1004 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1005 /* free the TCB but first save off the ep */
1006 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1007 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1011 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type)
1013 switch (chunk_type) {
1014 case SCTP_ASCONF_ACK:
1016 sctp_asconf_cleanup(stcb);
1018 case SCTP_IFORWARD_CUM_TSN:
1019 case SCTP_FORWARD_CUM_TSN:
1020 stcb->asoc.prsctp_supported = 0;
1023 SCTPDBG(SCTP_DEBUG_INPUT2,
1024 "Peer does not support chunk type %d (0x%x).\n",
1025 chunk_type, chunk_type);
1031 * Skip past the param header and then we will find the param that caused the
1032 * problem. There are a number of param's in a ASCONF OR the prsctp param
1033 * these will turn of specific features.
1034 * XXX: Is this the right thing to do?
1037 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1039 switch (parameter_type) {
1041 case SCTP_PRSCTP_SUPPORTED:
1042 stcb->asoc.prsctp_supported = 0;
1044 case SCTP_SUPPORTED_CHUNK_EXT:
1046 /* draft-ietf-tsvwg-addip-sctp */
1047 case SCTP_HAS_NAT_SUPPORT:
1048 stcb->asoc.peer_supports_nat = 0;
1050 case SCTP_ADD_IP_ADDRESS:
1051 case SCTP_DEL_IP_ADDRESS:
1052 case SCTP_SET_PRIM_ADDR:
1053 stcb->asoc.asconf_supported = 0;
1055 case SCTP_SUCCESS_REPORT:
1056 case SCTP_ERROR_CAUSE_IND:
1057 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1058 SCTPDBG(SCTP_DEBUG_INPUT2,
1059 "Turning off ASCONF to this strange peer\n");
1060 stcb->asoc.asconf_supported = 0;
1063 SCTPDBG(SCTP_DEBUG_INPUT2,
1064 "Peer does not support param type %d (0x%x)??\n",
1065 parameter_type, parameter_type);
1071 sctp_handle_error(struct sctp_chunkhdr *ch,
1072 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1074 struct sctp_error_cause *cause;
1075 struct sctp_association *asoc;
1076 uint32_t remaining_length, adjust;
1077 uint16_t code, cause_code, cause_length;
1079 /* parse through all of the errors and process */
1081 cause = (struct sctp_error_cause *)((caddr_t)ch +
1082 sizeof(struct sctp_chunkhdr));
1083 remaining_length = ntohs(ch->chunk_length);
1084 if (remaining_length > limit) {
1085 remaining_length = limit;
1087 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1088 remaining_length -= sizeof(struct sctp_chunkhdr);
1090 remaining_length = 0;
1093 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1094 /* Process an Error Cause */
1095 cause_code = ntohs(cause->code);
1096 cause_length = ntohs(cause->length);
1097 if ((cause_length > remaining_length) || (cause_length == 0)) {
1098 /* Invalid cause length, possibly due to truncation. */
1099 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1100 remaining_length, cause_length);
1104 /* report the first error cause */
1107 switch (cause_code) {
1108 case SCTP_CAUSE_INVALID_STREAM:
1109 case SCTP_CAUSE_MISSING_PARAM:
1110 case SCTP_CAUSE_INVALID_PARAM:
1111 case SCTP_CAUSE_NO_USER_DATA:
1112 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1115 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1116 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ERROR flags: %x\n",
1118 if (sctp_handle_nat_colliding_state(stcb)) {
1122 case SCTP_CAUSE_NAT_MISSING_STATE:
1123 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ERROR flags: %x\n",
1125 if (sctp_handle_nat_missing_state(stcb, net)) {
1129 case SCTP_CAUSE_STALE_COOKIE:
1131 * We only act if we have echoed a cookie and are
1134 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1135 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1137 struct sctp_error_stale_cookie *stale_cookie;
1138 uint64_t stale_time;
1140 asoc->stale_cookie_count++;
1141 if (asoc->stale_cookie_count > asoc->max_init_times) {
1142 sctp_abort_notification(stcb, false, true, 0, NULL, SCTP_SO_NOT_LOCKED);
1143 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1144 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1147 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1148 stale_time = ntohl(stale_cookie->stale_time);
1149 if (stale_time == 0) {
1150 /* Use an RTT as an approximation. */
1151 (void)SCTP_GETTIME_TIMEVAL(&now);
1152 timevalsub(&now, &asoc->time_entered);
1153 stale_time = (uint64_t)1000000 * (uint64_t)now.tv_sec + (uint64_t)now.tv_usec;
1154 if (stale_time == 0) {
1159 * stale_time is in usec, convert it to
1160 * msec. Round upwards, to ensure that it is
1163 stale_time = (stale_time + 999) / 1000;
1164 /* Double it, to be more robust on RTX. */
1165 stale_time = 2 * stale_time;
1166 asoc->cookie_preserve_req = (uint32_t)stale_time;
1167 if (asoc->overall_error_count == 0) {
1168 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
1169 SCTP_RTT_FROM_NON_DATA);
1171 asoc->overall_error_count = 0;
1172 /* Blast back to INIT state */
1173 sctp_toss_old_cookies(stcb, &stcb->asoc);
1174 sctp_stop_all_cookie_timers(stcb);
1175 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1176 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
1177 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1180 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1182 * Nothing we can do here, we don't do hostname
1183 * addresses so if the peer does not like my IPv6
1184 * (or IPv4 for that matter) it does not matter. If
1185 * they don't support that type of address, they can
1186 * NOT possibly get that packet type... i.e. with no
1187 * IPv6 you can't receive a IPv6 packet. so we can
1188 * safely ignore this one. If we ever added support
1189 * for HOSTNAME Addresses, then we would need to do
1193 case SCTP_CAUSE_UNRECOG_CHUNK:
1194 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1195 struct sctp_error_unrecognized_chunk *unrec_chunk;
1197 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1198 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type);
1201 case SCTP_CAUSE_UNRECOG_PARAM:
1202 /* XXX: We only consider the first parameter */
1203 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1204 struct sctp_paramhdr *unrec_parameter;
1206 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1207 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1210 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1212 * We ignore this since the timer will drive out a
1213 * new cookie anyway and there timer will drive us
1214 * to send a SHUTDOWN_COMPLETE. We can't send one
1215 * here since we don't have their tag.
1218 case SCTP_CAUSE_DELETING_LAST_ADDR:
1219 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1220 case SCTP_CAUSE_DELETING_SRC_ADDR:
1222 * We should NOT get these here, but in a
1225 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1228 case SCTP_CAUSE_OUT_OF_RESC:
1230 * And what, pray tell do we do with the fact that
1231 * the peer is out of resources? Not really sure we
1232 * could do anything but abort. I suspect this
1233 * should have came WITH an abort instead of in a
1238 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1242 adjust = SCTP_SIZE32(cause_length);
1243 if (remaining_length >= adjust) {
1244 remaining_length -= adjust;
1246 remaining_length = 0;
1248 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1250 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1255 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1256 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1257 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1258 struct sctp_nets *net, int *abort_no_unlock,
1259 uint8_t mflowtype, uint32_t mflowid,
1262 struct sctp_init_ack *init_ack;
1263 struct mbuf *op_err;
1265 SCTPDBG(SCTP_DEBUG_INPUT2,
1266 "sctp_handle_init_ack: handling INIT-ACK\n");
1269 SCTPDBG(SCTP_DEBUG_INPUT2,
1270 "sctp_handle_init_ack: TCB is null\n");
1273 /* Only process the INIT-ACK chunk in COOKIE WAIT state. */
1274 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
1275 init_ack = &cp->init;
1276 /* Validate parameters. */
1277 if ((ntohl(init_ack->initiate_tag) == 0) ||
1278 (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) ||
1279 (ntohs(init_ack->num_inbound_streams) == 0) ||
1280 (ntohs(init_ack->num_outbound_streams) == 0)) {
1281 /* One of the mandatory parameters is illegal. */
1282 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1283 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1284 src, dst, sh, op_err,
1287 *abort_no_unlock = 1;
1290 if (stcb->asoc.primary_destination->dest_state &
1291 SCTP_ADDR_UNCONFIRMED) {
1293 * The primary is where we sent the INIT, we can
1294 * always consider it confirmed when the INIT-ACK is
1295 * returned. Do this before we load addresses
1298 stcb->asoc.primary_destination->dest_state &=
1299 ~SCTP_ADDR_UNCONFIRMED;
1300 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1301 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1303 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1304 net, abort_no_unlock,
1307 /* error in parsing parameters */
1310 /* Update our state. */
1311 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1312 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1314 /* Reset the RTO calculation. */
1315 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1316 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1317 stcb->asoc.overall_error_count,
1319 SCTP_FROM_SCTP_INPUT,
1322 stcb->asoc.overall_error_count = 0;
1323 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1325 * Collapse the init timer back in case of a exponential
1328 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1331 * The output routine at the end of the inbound data
1332 * processing will cause the cookie to be sent.
1334 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1341 static struct sctp_tcb *
1342 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1343 struct sockaddr *src, struct sockaddr *dst,
1344 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1345 struct sctp_inpcb *inp, struct sctp_nets **netp,
1346 struct sockaddr *init_src, int *notification,
1347 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1348 uint8_t mflowtype, uint32_t mflowid,
1349 uint32_t vrf_id, uint16_t port);
1352 * handle a state cookie for an existing association m: input packet mbuf
1353 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1354 * "split" mbuf and the cookie signature does not exist offset: offset into
1355 * mbuf to the cookie-echo chunk
1357 static struct sctp_tcb *
1358 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1359 struct sockaddr *src, struct sockaddr *dst,
1360 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1361 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1362 struct sockaddr *init_src, int *notification,
1363 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1364 uint8_t mflowtype, uint32_t mflowid,
1365 uint32_t vrf_id, uint16_t port)
1367 struct sctp_association *asoc;
1368 struct sctp_init_chunk *init_cp, init_buf;
1369 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1370 struct sctp_asconf_addr *aparam, *naparam;
1371 struct sctp_asconf_ack *aack, *naack;
1372 struct sctp_tmit_chunk *chk, *nchk;
1373 struct sctp_stream_reset_list *strrst, *nstrrst;
1374 struct sctp_queued_to_read *sq, *nsq;
1375 struct sctp_nets *net;
1376 struct mbuf *op_err;
1377 int init_offset, initack_offset, i;
1381 #if defined(SCTP_DETAILED_STR_STATS)
1386 /* I know that the TCB is non-NULL from the caller */
1388 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1389 if (asoc->cookie_how[how_indx] == 0)
1392 if (how_indx < sizeof(asoc->cookie_how)) {
1393 asoc->cookie_how[how_indx] = 1;
1395 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1396 /* SHUTDOWN came in after sending INIT-ACK */
1397 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1398 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1399 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1400 mflowtype, mflowid, inp->fibnum,
1402 if (how_indx < sizeof(asoc->cookie_how))
1403 asoc->cookie_how[how_indx] = 2;
1404 SCTP_TCB_UNLOCK(stcb);
1408 * find and validate the INIT chunk in the cookie (peer's info) the
1409 * INIT should start after the cookie-echo header struct (chunk
1410 * header, state cookie header struct)
1412 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1414 init_cp = (struct sctp_init_chunk *)
1415 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1416 (uint8_t *)&init_buf);
1417 if (init_cp == NULL) {
1418 /* could not pull a INIT chunk in cookie */
1419 SCTP_TCB_UNLOCK(stcb);
1422 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1423 SCTP_TCB_UNLOCK(stcb);
1427 * find and validate the INIT-ACK chunk in the cookie (my info) the
1428 * INIT-ACK follows the INIT chunk
1430 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1431 initack_cp = (struct sctp_init_ack_chunk *)
1432 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1433 (uint8_t *)&initack_buf);
1434 if (initack_cp == NULL) {
1435 /* could not pull INIT-ACK chunk in cookie */
1436 SCTP_TCB_UNLOCK(stcb);
1439 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1440 SCTP_TCB_UNLOCK(stcb);
1443 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1444 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1446 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1447 * to get into the OPEN state
1449 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1451 * Opps, this means that we somehow generated two vtag's
1452 * the same. I.e. we did:
1454 * <---INIT(tag=a)------
1455 * ----INIT-ACK(tag=t)-->
1456 * ----INIT(tag=t)------> *1
1457 * <---INIT-ACK(tag=a)---
1458 * <----CE(tag=t)------------- *2
1460 * At point *1 we should be generating a different
1461 * tag t'. Which means we would throw away the CE and send
1462 * ours instead. Basically this is case C (throw away side).
1464 if (how_indx < sizeof(asoc->cookie_how))
1465 asoc->cookie_how[how_indx] = 17;
1466 SCTP_TCB_UNLOCK(stcb);
1469 switch (SCTP_GET_STATE(stcb)) {
1470 case SCTP_STATE_COOKIE_WAIT:
1471 case SCTP_STATE_COOKIE_ECHOED:
1473 * INIT was sent but got a COOKIE_ECHO with the
1474 * correct tags... just accept it...but we must
1475 * process the init so that we can make sure we have
1476 * the right seq no's.
1478 /* First we must process the INIT !! */
1479 if (sctp_process_init(init_cp, stcb) < 0) {
1480 if (how_indx < sizeof(asoc->cookie_how))
1481 asoc->cookie_how[how_indx] = 3;
1482 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1483 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1484 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1485 src, dst, sh, op_err,
1490 /* we have already processed the INIT so no problem */
1491 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1493 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1494 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1496 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1497 /* update current state */
1498 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1499 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1501 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1503 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1504 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1505 sctp_stop_all_cookie_timers(stcb);
1506 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1507 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1508 (!SCTP_IS_LISTENING(inp))) {
1510 * Here is where collision would go if we
1511 * did a connect() and instead got a
1512 * init/init-ack/cookie done before the
1513 * init-ack came back..
1515 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
1516 soisconnected(stcb->sctp_socket);
1518 /* notify upper layer */
1519 *notification = SCTP_NOTIFY_ASSOC_UP;
1520 net->hb_responded = 1;
1521 if (stcb->asoc.sctp_autoclose_ticks &&
1522 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1523 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1529 * we're in the OPEN state (or beyond), so peer must
1530 * have simply lost the COOKIE-ACK
1534 sctp_stop_all_cookie_timers(stcb);
1535 if ((retval = sctp_load_addresses_from_init(stcb, m,
1536 init_offset + sizeof(struct sctp_init_chunk),
1537 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1538 if (how_indx < sizeof(asoc->cookie_how))
1539 asoc->cookie_how[how_indx] = 4;
1540 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1541 "Problem with address parameters");
1542 SCTPDBG(SCTP_DEBUG_INPUT1,
1543 "Load addresses from INIT causes an abort %d\n",
1545 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1546 src, dst, sh, op_err,
1551 /* respond with a COOKIE-ACK */
1552 sctp_toss_old_cookies(stcb, asoc);
1553 sctp_send_cookie_ack(stcb);
1554 if (how_indx < sizeof(asoc->cookie_how))
1555 asoc->cookie_how[how_indx] = 5;
1559 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1560 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1561 cookie->tie_tag_my_vtag == 0 &&
1562 cookie->tie_tag_peer_vtag == 0) {
1564 * case C in Section 5.2.4 Table 2: XMOO silently discard
1566 if (how_indx < sizeof(asoc->cookie_how))
1567 asoc->cookie_how[how_indx] = 6;
1568 SCTP_TCB_UNLOCK(stcb);
1572 * If nat support, and the below and stcb is established, send back
1573 * a ABORT(colliding state) if we are established.
1575 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1576 (asoc->peer_supports_nat) &&
1577 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1578 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1579 (asoc->peer_vtag == 0)))) {
1581 * Special case - Peer's support nat. We may have two init's
1582 * that we gave out the same tag on since one was not
1583 * established.. i.e. we get INIT from host-1 behind the nat
1584 * and we respond tag-a, we get a INIT from host-2 behind
1585 * the nat and we get tag-a again. Then we bring up host-1
1586 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1587 * Now we have colliding state. We must send an abort here
1588 * with colliding state indication.
1590 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1591 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1592 mflowtype, mflowid, inp->fibnum,
1594 SCTP_TCB_UNLOCK(stcb);
1597 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1598 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1599 (asoc->peer_vtag == 0))) {
1601 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1602 * should be ok, re-accept peer info
1604 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1606 * Extension of case C. If we hit this, then the
1607 * random number generator returned the same vtag
1608 * when we first sent our INIT-ACK and when we later
1609 * sent our INIT. The side with the seq numbers that
1610 * are different will be the one that normally would
1611 * have hit case C. This in effect "extends" our
1612 * vtags in this collision case to be 64 bits. The
1613 * same collision could occur aka you get both vtag
1614 * and seq number the same twice in a row.. but is
1615 * much less likely. If it did happen then we would
1616 * proceed through and bring up the assoc.. we may
1617 * end up with the wrong stream setup however..
1618 * which would be bad.. but there is no way to
1619 * tell.. until we send on a stream that does not
1622 if (how_indx < sizeof(asoc->cookie_how))
1623 asoc->cookie_how[how_indx] = 7;
1625 SCTP_TCB_UNLOCK(stcb);
1628 if (how_indx < sizeof(asoc->cookie_how))
1629 asoc->cookie_how[how_indx] = 8;
1630 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1631 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1632 sctp_stop_all_cookie_timers(stcb);
1634 * since we did not send a HB make sure we don't double
1637 net->hb_responded = 1;
1638 if (stcb->asoc.sctp_autoclose_ticks &&
1639 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1640 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1643 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1644 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1645 asoc->pre_open_streams = asoc->streamoutcnt;
1648 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1650 * Ok the peer probably discarded our data (if we
1651 * echoed a cookie+data). So anything on the
1652 * sent_queue should be marked for retransmit, we
1653 * may not get something to kick us so it COULD
1654 * still take a timeout to move these.. but it can't
1655 * hurt to mark them.
1658 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1659 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1660 chk->sent = SCTP_DATAGRAM_RESEND;
1661 sctp_flight_size_decrease(chk);
1662 sctp_total_flight_decrease(stcb, chk);
1663 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1668 /* process the INIT info (peer's info) */
1669 if (sctp_process_init(init_cp, stcb) < 0) {
1670 if (how_indx < sizeof(asoc->cookie_how))
1671 asoc->cookie_how[how_indx] = 9;
1672 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1673 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1674 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1675 src, dst, sh, op_err,
1680 if ((retval = sctp_load_addresses_from_init(stcb, m,
1681 init_offset + sizeof(struct sctp_init_chunk),
1682 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1683 if (how_indx < sizeof(asoc->cookie_how))
1684 asoc->cookie_how[how_indx] = 10;
1685 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1686 "Problem with address parameters");
1687 SCTPDBG(SCTP_DEBUG_INPUT1,
1688 "Load addresses from INIT causes an abort %d\n",
1690 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1691 src, dst, sh, op_err,
1696 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1697 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1698 *notification = SCTP_NOTIFY_ASSOC_UP;
1700 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1701 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1702 (!SCTP_IS_LISTENING(inp))) {
1703 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
1704 soisconnected(stcb->sctp_socket);
1706 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1707 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1709 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1710 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1711 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1712 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1714 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1716 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1717 sctp_stop_all_cookie_timers(stcb);
1718 sctp_toss_old_cookies(stcb, asoc);
1719 sctp_send_cookie_ack(stcb);
1722 * only if we have retrans set do we do this. What
1723 * this call does is get only the COOKIE-ACK out and
1724 * then when we return the normal call to
1725 * sctp_chunk_output will get the retrans out behind
1728 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1730 if (how_indx < sizeof(asoc->cookie_how))
1731 asoc->cookie_how[how_indx] = 11;
1735 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1736 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1737 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1738 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1739 cookie->tie_tag_peer_vtag != 0) {
1740 struct sctpasochead *head;
1742 if (asoc->peer_supports_nat) {
1743 struct sctp_tcb *local_stcb;
1746 * This is a gross gross hack. Just call the
1747 * cookie_new code since we are allowing a duplicate
1748 * association. I hope this works...
1750 local_stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst,
1751 sh, cookie, cookie_len,
1752 inp, netp, init_src, notification,
1753 auth_skipped, auth_offset, auth_len,
1756 if (local_stcb == NULL) {
1757 SCTP_TCB_UNLOCK(stcb);
1759 return (local_stcb);
1762 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1765 if (how_indx < sizeof(asoc->cookie_how))
1766 asoc->cookie_how[how_indx] = 12;
1767 sctp_stop_association_timers(stcb, false);
1768 /* notify upper layer */
1769 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1770 atomic_add_int(&stcb->asoc.refcnt, 1);
1771 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1772 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1773 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1774 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1776 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1777 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1778 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1779 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1781 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1782 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1784 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1785 /* move to OPEN state, if not in SHUTDOWN_SENT */
1786 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1788 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1789 asoc->pre_open_streams = asoc->streamoutcnt;
1791 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1792 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1793 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1794 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1795 asoc->str_reset_seq_in = asoc->init_seq_number;
1796 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1797 asoc->send_sack = 1;
1798 asoc->data_pkts_seen = 0;
1799 asoc->last_data_chunk_from = NULL;
1800 asoc->last_control_chunk_from = NULL;
1801 asoc->last_net_cmt_send_started = NULL;
1802 if (asoc->mapping_array) {
1803 memset(asoc->mapping_array, 0,
1804 asoc->mapping_array_size);
1806 if (asoc->nr_mapping_array) {
1807 memset(asoc->nr_mapping_array, 0,
1808 asoc->mapping_array_size);
1810 SCTP_TCB_UNLOCK(stcb);
1811 SCTP_INP_INFO_WLOCK();
1812 SCTP_INP_WLOCK(stcb->sctp_ep);
1813 SCTP_TCB_LOCK(stcb);
1814 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1815 /* send up all the data */
1816 sctp_report_all_outbound(stcb, 0, SCTP_SO_LOCKED);
1817 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1818 stcb->asoc.strmout[i].chunks_on_queues = 0;
1819 #if defined(SCTP_DETAILED_STR_STATS)
1820 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1821 asoc->strmout[i].abandoned_sent[j] = 0;
1822 asoc->strmout[i].abandoned_unsent[j] = 0;
1825 asoc->strmout[i].abandoned_sent[0] = 0;
1826 asoc->strmout[i].abandoned_unsent[0] = 0;
1828 stcb->asoc.strmout[i].next_mid_ordered = 0;
1829 stcb->asoc.strmout[i].next_mid_unordered = 0;
1830 stcb->asoc.strmout[i].sid = i;
1831 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1833 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
1834 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
1835 SCTP_FREE(strrst, SCTP_M_STRESET);
1837 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
1838 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
1840 sctp_m_freem(sq->data);
1843 sctp_free_remote_addr(sq->whoFrom);
1846 sctp_free_a_readq(stcb, sq);
1848 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
1849 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
1851 sctp_m_freem(chk->data);
1854 if (chk->holds_key_ref)
1855 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1856 sctp_free_remote_addr(chk->whoTo);
1857 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1858 SCTP_DECR_CHK_COUNT();
1860 asoc->ctrl_queue_cnt = 0;
1861 asoc->str_reset = NULL;
1862 asoc->stream_reset_outstanding = 0;
1863 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
1864 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
1866 sctp_m_freem(chk->data);
1869 if (chk->holds_key_ref)
1870 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1871 sctp_free_remote_addr(chk->whoTo);
1872 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1873 SCTP_DECR_CHK_COUNT();
1875 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
1876 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
1877 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1879 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
1880 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
1881 if (aack->data != NULL) {
1882 sctp_m_freem(aack->data);
1884 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
1886 asoc->rcv_edmid = cookie->rcv_edmid;
1888 /* process the INIT-ACK info (my info) */
1889 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1890 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1892 /* pull from vtag hash */
1893 LIST_REMOVE(stcb, sctp_asocs);
1894 /* re-insert to new vtag position */
1895 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1896 SCTP_BASE_INFO(hashasocmark))];
1898 * put it in the bucket in the vtag hash of assoc's for the
1901 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1903 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1904 SCTP_INP_INFO_WUNLOCK();
1905 asoc->total_flight = 0;
1906 asoc->total_flight_count = 0;
1907 /* process the INIT info (peer's info) */
1908 if (sctp_process_init(init_cp, stcb) < 0) {
1909 if (how_indx < sizeof(asoc->cookie_how))
1910 asoc->cookie_how[how_indx] = 13;
1911 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1912 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1913 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1914 src, dst, sh, op_err,
1920 * since we did not send a HB make sure we don't double
1923 net->hb_responded = 1;
1925 if ((retval = sctp_load_addresses_from_init(stcb, m,
1926 init_offset + sizeof(struct sctp_init_chunk),
1927 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1928 if (how_indx < sizeof(asoc->cookie_how))
1929 asoc->cookie_how[how_indx] = 14;
1930 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1931 "Problem with address parameters");
1932 SCTPDBG(SCTP_DEBUG_INPUT1,
1933 "Load addresses from INIT causes an abort %d\n",
1935 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1936 src, dst, sh, op_err,
1941 /* respond with a COOKIE-ACK */
1942 sctp_send_cookie_ack(stcb);
1943 if (how_indx < sizeof(asoc->cookie_how))
1944 asoc->cookie_how[how_indx] = 15;
1945 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE) &&
1946 (asoc->sctp_autoclose_ticks > 0)) {
1947 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
1951 if (how_indx < sizeof(asoc->cookie_how))
1952 asoc->cookie_how[how_indx] = 16;
1953 /* all other cases... */
1954 SCTP_TCB_UNLOCK(stcb);
1959 * handle a state cookie for a new association m: input packet mbuf chain--
1960 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
1961 * and the cookie signature does not exist offset: offset into mbuf to the
1962 * cookie-echo chunk length: length of the cookie chunk to: where the init
1963 * was from returns a new TCB
1965 static struct sctp_tcb *
1966 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1967 struct sockaddr *src, struct sockaddr *dst,
1968 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1969 struct sctp_inpcb *inp, struct sctp_nets **netp,
1970 struct sockaddr *init_src, int *notification,
1971 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1972 uint8_t mflowtype, uint32_t mflowid,
1973 uint32_t vrf_id, uint16_t port)
1975 struct sctp_tcb *stcb;
1976 struct sctp_init_chunk *init_cp, init_buf;
1977 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1978 union sctp_sockstore store;
1979 struct sctp_association *asoc;
1980 int init_offset, initack_offset, initack_limit;
1982 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
1985 * find and validate the INIT chunk in the cookie (peer's info) the
1986 * INIT should start after the cookie-echo header struct (chunk
1987 * header, state cookie header struct)
1989 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
1990 init_cp = (struct sctp_init_chunk *)
1991 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1992 (uint8_t *)&init_buf);
1993 if (init_cp == NULL) {
1994 /* could not pull a INIT chunk in cookie */
1995 SCTPDBG(SCTP_DEBUG_INPUT1,
1996 "process_cookie_new: could not pull INIT chunk hdr\n");
1999 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2000 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2003 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2005 * find and validate the INIT-ACK chunk in the cookie (my info) the
2006 * INIT-ACK follows the INIT chunk
2008 initack_cp = (struct sctp_init_ack_chunk *)
2009 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2010 (uint8_t *)&initack_buf);
2011 if (initack_cp == NULL) {
2012 /* could not pull INIT-ACK chunk in cookie */
2013 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2016 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2020 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2021 * "initack_limit" value. This is because the chk_length field
2022 * includes the length of the cookie, but the cookie is omitted when
2023 * the INIT and INIT_ACK are tacked onto the cookie...
2025 initack_limit = offset + cookie_len;
2028 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2033 * Here we do a trick, we set in NULL for the proc/thread argument.
2034 * We do this since in effect we only use the p argument when the
2035 * socket is unbound and we must do an implicit bind. Since we are
2036 * getting a cookie, we cannot be unbound.
2038 stcb = sctp_aloc_assoc(inp, init_src, &error,
2039 ntohl(initack_cp->init.initiate_tag),
2040 ntohl(initack_cp->init.initial_tsn), vrf_id,
2041 ntohs(initack_cp->init.num_outbound_streams),
2043 (struct thread *)NULL,
2044 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2046 struct mbuf *op_err;
2048 /* memory problem? */
2049 SCTPDBG(SCTP_DEBUG_INPUT1,
2050 "process_cookie_new: no room for another TCB!\n");
2051 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2052 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2053 src, dst, sh, op_err,
2059 /* get scope variables out of cookie */
2060 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2061 asoc->scope.site_scope = cookie->site_scope;
2062 asoc->scope.local_scope = cookie->local_scope;
2063 asoc->scope.loopback_scope = cookie->loopback_scope;
2065 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2066 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2067 struct mbuf *op_err;
2070 * Houston we have a problem. The EP changed while the
2071 * cookie was in flight. Only recourse is to abort the
2074 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2075 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2076 src, dst, sh, op_err,
2079 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2080 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2083 asoc->rcv_edmid = cookie->rcv_edmid;
2084 /* process the INIT-ACK info (my info) */
2085 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2087 /* process the INIT info (peer's info) */
2088 if (sctp_process_init(init_cp, stcb) < 0) {
2089 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2090 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2093 /* load all addresses */
2094 if (sctp_load_addresses_from_init(stcb, m,
2095 init_offset + sizeof(struct sctp_init_chunk),
2096 initack_offset, src, dst, init_src, port) < 0) {
2097 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2098 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2102 * verify any preceding AUTH chunk that was skipped
2104 /* pull the local authentication parameters from the cookie/init-ack */
2105 sctp_auth_get_cookie_params(stcb, m,
2106 initack_offset + sizeof(struct sctp_init_ack_chunk),
2107 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2109 struct sctp_auth_chunk *auth;
2111 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2112 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2116 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2117 /* auth HMAC failed, dump the assoc and packet */
2118 SCTPDBG(SCTP_DEBUG_AUTH1,
2119 "COOKIE-ECHO: AUTH failed\n");
2120 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2121 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2124 /* remaining chunks checked... good to go */
2125 stcb->asoc.authenticated = 1;
2130 * if we're doing ASCONFs, check to see if we have any new local
2131 * addresses that need to get added to the peer (eg. addresses
2132 * changed while cookie echo in flight). This needs to be done
2133 * after we go to the OPEN state to do the correct asconf
2134 * processing. else, make sure we have the correct addresses in our
2138 /* warning, we re-use sin, sin6, sa_store here! */
2139 /* pull in local_address (our "from" address) */
2140 switch (cookie->laddr_type) {
2142 case SCTP_IPV4_ADDRESS:
2143 /* source addr is IPv4 */
2144 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2145 store.sin.sin_family = AF_INET;
2146 store.sin.sin_len = sizeof(struct sockaddr_in);
2147 store.sin.sin_addr.s_addr = cookie->laddress[0];
2151 case SCTP_IPV6_ADDRESS:
2152 /* source addr is IPv6 */
2153 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2154 store.sin6.sin6_family = AF_INET6;
2155 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2156 store.sin6.sin6_scope_id = cookie->scope_id;
2157 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2161 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2162 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2166 /* update current state */
2167 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2168 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2169 sctp_stop_all_cookie_timers(stcb);
2170 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2171 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2173 /* set up to notify upper layer */
2174 *notification = SCTP_NOTIFY_ASSOC_UP;
2175 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2176 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2177 (!SCTP_IS_LISTENING(inp))) {
2179 * This is an endpoint that called connect() how it got a
2180 * cookie that is NEW is a bit of a mystery. It must be that
2181 * the INIT was sent, but before it got there.. a complete
2182 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2183 * should have went to the other code.. not here.. oh well..
2184 * a bit of protection is worth having..
2188 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
2189 soisconnected(stcb->sctp_socket);
2190 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2191 (SCTP_IS_LISTENING(inp))) {
2193 * We don't want to do anything with this one. Since it is
2194 * the listening guy. The timer will get started for
2195 * accepted connections in the caller.
2199 if (stcb->asoc.sctp_autoclose_ticks &&
2200 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2201 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2203 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2204 *netp = sctp_findnet(stcb, init_src);
2205 if (*netp != NULL) {
2207 * Since we did not send a HB, make sure we don't double
2210 (*netp)->hb_responded = 1;
2212 /* respond with a COOKIE-ACK */
2213 sctp_send_cookie_ack(stcb);
2216 * check the address lists for any ASCONFs that need to be sent
2217 * AFTER the cookie-ack is sent
2219 sctp_check_address_list(stcb, m,
2220 initack_offset + sizeof(struct sctp_init_ack_chunk),
2221 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2222 &store.sa, cookie->local_scope, cookie->site_scope,
2223 cookie->ipv4_scope, cookie->loopback_scope);
2229 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2230 * we NEED to make sure we are not already using the vtag. If so we
2231 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2232 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2233 SCTP_BASE_INFO(hashasocmark))];
2234 LIST_FOREACH(stcb, head, sctp_asocs) {
2235 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2236 -- SEND ABORT - TRY AGAIN --
2242 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2243 * existing (non-NULL) TCB
2245 static struct mbuf *
2246 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2247 struct sockaddr *src, struct sockaddr *dst,
2248 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2249 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2250 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2251 struct sctp_tcb **locked_tcb,
2252 uint8_t mflowtype, uint32_t mflowid,
2253 uint32_t vrf_id, uint16_t port)
2255 struct sctp_state_cookie *cookie;
2256 struct sctp_tcb *l_stcb = *stcb;
2257 struct sctp_inpcb *l_inp;
2258 struct sockaddr *to;
2259 struct sctp_pcb *ep;
2261 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2263 uint8_t cookie_ok = 0;
2264 unsigned int sig_offset, cookie_offset;
2265 unsigned int cookie_len;
2267 struct timeval time_entered, time_expires;
2268 int notification = 0;
2269 struct sctp_nets *netl;
2270 int had_a_existing_tcb = 0;
2271 int send_int_conf = 0;
2273 struct sockaddr_in sin;
2276 struct sockaddr_in6 sin6;
2279 SCTPDBG(SCTP_DEBUG_INPUT2,
2280 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2282 if (inp_p == NULL) {
2285 cookie = &cp->cookie;
2286 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2287 cookie_len = ntohs(cp->ch.chunk_length);
2289 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2290 sizeof(struct sctp_init_chunk) +
2291 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2292 /* cookie too small */
2295 if ((cookie->peerport != sh->src_port) ||
2296 (cookie->myport != sh->dest_port) ||
2297 (cookie->my_vtag != sh->v_tag)) {
2299 * invalid ports or bad tag. Note that we always leave the
2300 * v_tag in the header in network order and when we stored
2301 * it in the my_vtag slot we also left it in network order.
2302 * This maintains the match even though it may be in the
2303 * opposite byte order of the machine :->
2308 * split off the signature into its own mbuf (since it should not be
2309 * calculated in the sctp_hmac_m() call).
2311 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2312 m_sig = m_split(m, sig_offset, M_NOWAIT);
2313 if (m_sig == NULL) {
2314 /* out of memory or ?? */
2317 #ifdef SCTP_MBUF_LOGGING
2318 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2319 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2324 * compute the signature/digest for the cookie
2326 if (l_stcb != NULL) {
2327 atomic_add_int(&l_stcb->asoc.refcnt, 1);
2328 SCTP_TCB_UNLOCK(l_stcb);
2331 SCTP_INP_RLOCK(l_inp);
2332 if (l_stcb != NULL) {
2333 SCTP_TCB_LOCK(l_stcb);
2334 atomic_subtract_int(&l_stcb->asoc.refcnt, 1);
2336 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2337 SCTP_INP_RUNLOCK(l_inp);
2338 sctp_m_freem(m_sig);
2341 ep = &(*inp_p)->sctp_ep;
2342 /* which cookie is it? */
2343 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2344 (ep->current_secret_number != ep->last_secret_number)) {
2345 /* it's the old cookie */
2346 (void)sctp_hmac_m(SCTP_HMAC,
2347 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2348 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2350 /* it's the current cookie */
2351 (void)sctp_hmac_m(SCTP_HMAC,
2352 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2353 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2355 /* get the signature */
2356 SCTP_INP_RUNLOCK(l_inp);
2357 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2359 /* couldn't find signature */
2360 sctp_m_freem(m_sig);
2363 /* compare the received digest with the computed digest */
2364 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2365 /* try the old cookie? */
2366 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2367 (ep->current_secret_number != ep->last_secret_number)) {
2368 /* compute digest with old */
2369 (void)sctp_hmac_m(SCTP_HMAC,
2370 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2371 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2373 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2381 * Now before we continue we must reconstruct our mbuf so that
2382 * normal processing of any other chunks will work.
2388 while (SCTP_BUF_NEXT(m_at) != NULL) {
2389 m_at = SCTP_BUF_NEXT(m_at);
2391 SCTP_BUF_NEXT(m_at) = m_sig;
2394 if (cookie_ok == 0) {
2395 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2396 SCTPDBG(SCTP_DEBUG_INPUT2,
2397 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2398 (uint32_t)offset, cookie_offset, sig_offset);
2402 if (sctp_ticks_to_msecs(cookie->cookie_life) > SCTP_MAX_COOKIE_LIFE) {
2403 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid cookie lifetime\n");
2406 time_entered.tv_sec = cookie->time_entered.tv_sec;
2407 time_entered.tv_usec = cookie->time_entered.tv_usec;
2408 if ((time_entered.tv_sec < 0) ||
2409 (time_entered.tv_usec < 0) ||
2410 (time_entered.tv_usec >= 1000000)) {
2411 /* Invalid time stamp. Cookie must have been modified. */
2412 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid time stamp\n");
2415 (void)SCTP_GETTIME_TIMEVAL(&now);
2416 if (timevalcmp(&now, &time_entered, <)) {
2417 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie generated in the future!\n");
2421 * Check the cookie timestamps to be sure it's not stale.
2422 * cookie_life is in ticks, so we convert to seconds.
2424 time_expires.tv_sec = time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2425 time_expires.tv_usec = time_entered.tv_usec;
2426 if (timevalcmp(&now, &time_expires, >)) {
2427 /* cookie is stale! */
2428 struct mbuf *op_err;
2429 struct sctp_error_stale_cookie *cause;
2430 struct timeval diff;
2433 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2434 0, M_NOWAIT, 1, MT_DATA);
2435 if (op_err == NULL) {
2440 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2441 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2442 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2443 cause->cause.length = htons(sizeof(struct sctp_error_stale_cookie));
2445 timevalsub(&diff, &time_expires);
2446 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2447 staleness = UINT32_MAX;
2449 staleness = (uint32_t)diff.tv_sec * 1000000;
2451 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2452 staleness += (uint32_t)diff.tv_usec;
2454 staleness = UINT32_MAX;
2456 cause->stale_time = htonl(staleness);
2457 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2458 mflowtype, mflowid, l_inp->fibnum,
2463 * Now we must see with the lookup address if we have an existing
2464 * asoc. This will only happen if we were in the COOKIE-WAIT state
2465 * and a INIT collided with us and somewhere the peer sent the
2466 * cookie on another address besides the single address our assoc
2467 * had for him. In this case we will have one of the tie-tags set at
2468 * least AND the address field in the cookie can be used to look it
2472 switch (cookie->addr_type) {
2474 case SCTP_IPV6_ADDRESS:
2475 memset(&sin6, 0, sizeof(sin6));
2476 sin6.sin6_family = AF_INET6;
2477 sin6.sin6_len = sizeof(sin6);
2478 sin6.sin6_port = sh->src_port;
2479 sin6.sin6_scope_id = cookie->scope_id;
2480 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2481 sizeof(sin6.sin6_addr.s6_addr));
2482 to = (struct sockaddr *)&sin6;
2486 case SCTP_IPV4_ADDRESS:
2487 memset(&sin, 0, sizeof(sin));
2488 sin.sin_family = AF_INET;
2489 sin.sin_len = sizeof(sin);
2490 sin.sin_port = sh->src_port;
2491 sin.sin_addr.s_addr = cookie->address[0];
2492 to = (struct sockaddr *)&sin;
2496 /* This should not happen */
2499 if (*stcb == NULL) {
2500 /* Yep, lets check */
2501 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2502 if (*stcb == NULL) {
2504 * We should have only got back the same inp. If we
2505 * got back a different ep we have a problem. The
2506 * original findep got back l_inp and now
2508 if (l_inp != *inp_p) {
2509 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2512 if (*locked_tcb == NULL) {
2514 * In this case we found the assoc only
2515 * after we locked the create lock. This
2516 * means we are in a colliding case and we
2517 * must make sure that we unlock the tcb if
2518 * its one of the cases where we throw away
2519 * the incoming packets.
2521 *locked_tcb = *stcb;
2524 * We must also increment the inp ref count
2525 * since the ref_count flags was set when we
2526 * did not find the TCB, now we found it
2527 * which reduces the refcount.. we must
2528 * raise it back out to balance it all :-)
2530 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2531 if ((*stcb)->sctp_ep != l_inp) {
2532 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2533 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2539 cookie_len -= SCTP_SIGNATURE_SIZE;
2540 if (*stcb == NULL) {
2541 /* this is the "normal" case... get a new TCB */
2542 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2543 cookie, cookie_len, *inp_p,
2544 netp, to, ¬ification,
2545 auth_skipped, auth_offset, auth_len,
2549 /* this is abnormal... cookie-echo on existing TCB */
2550 had_a_existing_tcb = 1;
2551 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2553 cookie, cookie_len, *inp_p, *stcb, netp, to,
2554 ¬ification, auth_skipped, auth_offset, auth_len,
2557 if (*stcb == NULL) {
2562 if (*stcb == NULL) {
2563 /* still no TCB... must be bad cookie-echo */
2566 if (*netp != NULL) {
2567 (*netp)->flowtype = mflowtype;
2568 (*netp)->flowid = mflowid;
2571 * Ok, we built an association so confirm the address we sent the
2574 netl = sctp_findnet(*stcb, to);
2576 * This code should in theory NOT run but
2579 /* TSNH! Huh, why do I need to add this address here? */
2580 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2581 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2584 netl = sctp_findnet(*stcb, to);
2587 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2588 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2589 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2594 sctp_start_net_timers(*stcb);
2595 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2596 if (!had_a_existing_tcb ||
2597 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2599 * If we have a NEW cookie or the connect never
2600 * reached the connected state during collision we
2601 * must do the TCP accept thing.
2603 struct socket *so, *oso;
2604 struct sctp_inpcb *inp;
2606 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2608 * For a restart we will keep the same
2609 * socket, no need to do anything. I THINK!!
2611 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2612 if (send_int_conf) {
2613 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2614 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2618 oso = (*inp_p)->sctp_socket;
2619 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2620 SCTP_TCB_UNLOCK((*stcb));
2621 CURVNET_SET(oso->so_vnet);
2622 so = sonewconn(oso, 0
2625 SCTP_TCB_LOCK((*stcb));
2626 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2629 struct mbuf *op_err;
2631 /* Too many sockets */
2632 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2633 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2634 sctp_abort_association(*inp_p, NULL, m, iphlen,
2635 src, dst, sh, op_err,
2638 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2639 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2642 inp = (struct sctp_inpcb *)so->so_pcb;
2643 SCTP_INP_INCR_REF(inp);
2645 * We add the unbound flag here so that if we get an
2646 * soabort() before we get the move_pcb done, we
2647 * will properly cleanup.
2649 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2650 SCTP_PCB_FLAGS_CONNECTED |
2651 SCTP_PCB_FLAGS_IN_TCPPOOL |
2652 SCTP_PCB_FLAGS_UNBOUND |
2653 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2654 SCTP_PCB_FLAGS_DONT_WAKE);
2655 inp->sctp_features = (*inp_p)->sctp_features;
2656 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2657 inp->sctp_socket = so;
2658 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2659 inp->max_cwnd = (*inp_p)->max_cwnd;
2660 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2661 inp->ecn_supported = (*inp_p)->ecn_supported;
2662 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2663 inp->auth_supported = (*inp_p)->auth_supported;
2664 inp->asconf_supported = (*inp_p)->asconf_supported;
2665 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2666 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2667 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2668 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2669 inp->sctp_context = (*inp_p)->sctp_context;
2670 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2671 inp->fibnum = (*inp_p)->fibnum;
2673 * copy in the authentication parameters from the
2676 if (inp->sctp_ep.local_hmacs)
2677 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2678 inp->sctp_ep.local_hmacs =
2679 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2680 if (inp->sctp_ep.local_auth_chunks)
2681 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2682 inp->sctp_ep.local_auth_chunks =
2683 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2686 * Now we must move it from one hash table to
2687 * another and get the tcb in the right place.
2691 * This is where the one-2-one socket is put into
2692 * the accept state waiting for the accept!
2695 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2697 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2699 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2700 SCTP_TCB_UNLOCK((*stcb));
2702 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2704 SCTP_TCB_LOCK((*stcb));
2705 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2708 * now we must check to see if we were aborted while
2709 * the move was going on and the lock/unlock
2712 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2714 * yep it was, we leave the assoc attached
2715 * to the socket since the sctp_inpcb_free()
2716 * call will send an abort for us.
2718 SCTP_INP_DECR_REF(inp);
2721 SCTP_INP_DECR_REF(inp);
2722 /* Switch over to the new guy */
2724 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2725 if (send_int_conf) {
2726 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2727 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2731 * Pull it from the incomplete queue and wake the
2739 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2741 if (send_int_conf) {
2742 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2743 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2749 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2750 struct sctp_tcb *stcb, struct sctp_nets *net)
2752 /* cp must not be used, others call this without a c-ack :-) */
2753 struct sctp_association *asoc;
2754 struct sctp_tmit_chunk *chk;
2756 SCTPDBG(SCTP_DEBUG_INPUT2,
2757 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2758 if ((stcb == NULL) || (net == NULL)) {
2763 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2764 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2765 asoc->overall_error_count,
2767 SCTP_FROM_SCTP_INPUT,
2770 sctp_stop_all_cookie_timers(stcb);
2771 sctp_toss_old_cookies(stcb, asoc);
2772 /* process according to association state */
2773 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2774 /* state change only needed when I am in right state */
2775 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2776 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2777 sctp_start_net_timers(stcb);
2779 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2780 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2781 if (asoc->overall_error_count == 0) {
2782 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2783 SCTP_RTT_FROM_NON_DATA);
2786 * Since we did not send a HB make sure we don't double
2789 asoc->overall_error_count = 0;
2790 net->hb_responded = 1;
2791 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2792 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2793 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2794 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2795 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
2796 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2797 soisconnected(stcb->sctp_socket);
2801 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) &&
2802 TAILQ_EMPTY(&asoc->send_queue) &&
2803 TAILQ_EMPTY(&asoc->sent_queue) &&
2804 (asoc->stream_queue_cnt == 0)) {
2805 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2806 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
2807 sctp_stop_timers_for_shutdown(stcb);
2808 sctp_send_shutdown(stcb, net);
2809 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
2810 stcb->sctp_ep, stcb, net);
2811 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2812 stcb->sctp_ep, stcb, NULL);
2813 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_LOCKED);
2816 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2818 * We don't need to do the asconf thing, nor hb or
2819 * autoclose if the socket is closed.
2824 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2827 if (stcb->asoc.sctp_autoclose_ticks &&
2828 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2829 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2830 stcb->sctp_ep, stcb, NULL);
2833 * send ASCONF if parameters are pending and ASCONFs are
2834 * allowed (eg. addresses changed when init/cookie echo were
2837 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2838 (stcb->asoc.asconf_supported == 1) &&
2839 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2840 #ifdef SCTP_TIMER_BASED_ASCONF
2841 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2842 stcb->sctp_ep, stcb,
2843 stcb->asoc.primary_destination);
2845 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2846 SCTP_ADDR_NOT_LOCKED);
2851 /* Restart the timer if we have pending data */
2852 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2853 if (chk->whoTo != NULL) {
2858 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2863 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2864 struct sctp_tcb *stcb)
2866 struct sctp_nets *net;
2867 struct sctp_tmit_chunk *lchk;
2868 struct sctp_ecne_chunk bkup;
2869 uint8_t override_bit;
2870 uint32_t tsn, window_data_tsn;
2872 unsigned int pkt_cnt;
2874 len = ntohs(cp->ch.chunk_length);
2875 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2876 /* Its the old format */
2877 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2878 bkup.num_pkts_since_cwr = htonl(1);
2881 SCTP_STAT_INCR(sctps_recvecne);
2882 tsn = ntohl(cp->tsn);
2883 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2884 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2886 window_data_tsn = stcb->asoc.sending_seq - 1;
2888 window_data_tsn = lchk->rec.data.tsn;
2891 /* Find where it was sent to if possible. */
2893 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2894 if (lchk->rec.data.tsn == tsn) {
2896 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2899 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2905 * What to do. A previous send of a CWR was possibly lost.
2906 * See how old it is, we may have it marked on the actual
2909 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2910 if (tsn == net->last_cwr_tsn) {
2911 /* Found him, send it off */
2917 * If we reach here, we need to send a special CWR
2918 * that says hey, we did this a long time ago and
2919 * you lost the response.
2921 net = TAILQ_FIRST(&stcb->asoc.nets);
2926 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2933 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2934 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2936 * JRS - Use the congestion control given in the pluggable
2939 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2941 * We reduce once every RTT. So we will only lower cwnd at
2942 * the next sending seq i.e. the window_data_tsn
2944 net->cwr_window_tsn = window_data_tsn;
2945 net->ecn_ce_pkt_cnt += pkt_cnt;
2946 net->lost_cnt = pkt_cnt;
2947 net->last_cwr_tsn = tsn;
2949 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2950 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2951 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2953 * Another loss in the same window update how many
2954 * marks/packets lost we have had.
2958 if (pkt_cnt > net->lost_cnt) {
2959 /* Should be the case */
2960 cnt = (pkt_cnt - net->lost_cnt);
2961 net->ecn_ce_pkt_cnt += cnt;
2963 net->lost_cnt = pkt_cnt;
2964 net->last_cwr_tsn = tsn;
2966 * Most CC functions will ignore this call, since we
2967 * are in-window yet of the initial CE the peer saw.
2969 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2973 * We always send a CWR this way if our previous one was lost our
2974 * peer will get an update, or if it is not time again to reduce we
2975 * still get the cwr to the peer. Note we set the override when we
2976 * could not find the TSN on the chunk or the destination network.
2978 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2982 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2985 * Here we get a CWR from the peer. We must look in the outqueue and
2986 * make sure that we have a covered ECNE in the control chunk part.
2989 struct sctp_tmit_chunk *chk, *nchk;
2990 struct sctp_ecne_chunk *ecne;
2994 cwr_tsn = ntohl(cp->tsn);
2995 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
2996 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
2997 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3000 if ((override == 0) && (chk->whoTo != net)) {
3001 /* Must be from the right src unless override is set */
3004 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3005 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3006 /* this covers this ECNE, we can remove it */
3007 stcb->asoc.ecn_echo_cnt_onq--;
3008 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3010 stcb->asoc.ctrl_queue_cnt--;
3011 sctp_m_freem(chk->data);
3013 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3014 if (override == 0) {
3022 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3023 struct sctp_tcb *stcb, struct sctp_nets *net)
3026 SCTPDBG(SCTP_DEBUG_INPUT2,
3027 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3031 /* process according to association state */
3032 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3033 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3034 SCTPDBG(SCTP_DEBUG_INPUT2,
3035 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3036 SCTP_TCB_UNLOCK(stcb);
3039 /* notify upper layer protocol */
3040 if (stcb->sctp_socket) {
3041 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3044 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3045 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3046 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3047 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3050 /* stop the timer */
3051 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3052 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3053 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3055 SCTPDBG(SCTP_DEBUG_INPUT2,
3056 "sctp_handle_shutdown_complete: calls free-asoc\n");
3057 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3058 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3063 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3064 struct sctp_nets *net, uint8_t flg)
3066 switch (desc->chunk_type) {
3069 /* find the tsn to resend (possibly) */
3072 struct sctp_tmit_chunk *tp1;
3074 tsn = ntohl(desc->tsn_ifany);
3075 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3076 if (tp1->rec.data.tsn == tsn) {
3080 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3088 * Do it the other way , aka without paying
3089 * attention to queue seq order.
3091 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3092 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3093 if (tp1->rec.data.tsn == tsn) {
3100 SCTP_STAT_INCR(sctps_pdrptsnnf);
3102 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3103 if (((flg & SCTP_BADCRC) == 0) &&
3104 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3107 if ((stcb->asoc.peers_rwnd == 0) &&
3108 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3109 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3112 if (stcb->asoc.peers_rwnd == 0 &&
3113 (flg & SCTP_FROM_MIDDLE_BOX)) {
3114 SCTP_STAT_INCR(sctps_pdrpdizrw);
3117 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3118 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3119 /* Payload not matching. */
3120 SCTP_STAT_INCR(sctps_pdrpbadd);
3123 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3124 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3125 /* Payload not matching. */
3126 SCTP_STAT_INCR(sctps_pdrpbadd);
3131 * this guy had a RTO calculation
3132 * pending on it, cancel it
3134 if (tp1->whoTo->rto_needed == 0) {
3135 tp1->whoTo->rto_needed = 1;
3139 SCTP_STAT_INCR(sctps_pdrpmark);
3140 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3141 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3143 * mark it as if we were doing a FR, since
3144 * we will be getting gap ack reports behind
3145 * the info from the router.
3147 tp1->rec.data.doing_fast_retransmit = 1;
3149 * mark the tsn with what sequences can
3152 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3153 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3155 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3158 /* restart the timer */
3159 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3161 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3162 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3165 /* fix counts and things */
3166 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3167 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3168 tp1->whoTo->flight_size,
3170 (uint32_t)(uintptr_t)stcb,
3173 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3174 sctp_flight_size_decrease(tp1);
3175 sctp_total_flight_decrease(stcb, tp1);
3177 tp1->sent = SCTP_DATAGRAM_RESEND;
3183 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3184 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3187 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3189 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3192 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3193 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3194 audit, stcb->asoc.sent_queue_retran_cnt);
3195 #ifndef SCTP_AUDITING_ENABLED
3196 stcb->asoc.sent_queue_retran_cnt = audit;
3204 struct sctp_tmit_chunk *asconf;
3206 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3208 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3213 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3214 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3215 asconf->sent = SCTP_DATAGRAM_RESEND;
3216 asconf->snd_count--;
3220 case SCTP_INITIATION:
3221 /* resend the INIT */
3222 stcb->asoc.dropped_special_cnt++;
3223 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3225 * If we can get it in, in a few attempts we do
3226 * this, otherwise we let the timer fire.
3228 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3230 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3231 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3234 case SCTP_SELECTIVE_ACK:
3235 case SCTP_NR_SELECTIVE_ACK:
3236 /* resend the sack */
3237 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3239 case SCTP_HEARTBEAT_REQUEST:
3240 /* resend a demand HB */
3241 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3243 * Only retransmit if we KNOW we wont destroy the
3246 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3250 sctp_send_shutdown(stcb, net);
3252 case SCTP_SHUTDOWN_ACK:
3253 sctp_send_shutdown_ack(stcb, net);
3255 case SCTP_COOKIE_ECHO:
3257 struct sctp_tmit_chunk *cookie;
3260 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3262 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3267 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3268 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3269 cookie->sent = SCTP_DATAGRAM_RESEND;
3270 sctp_stop_all_cookie_timers(stcb);
3274 case SCTP_COOKIE_ACK:
3275 sctp_send_cookie_ack(stcb);
3277 case SCTP_ASCONF_ACK:
3278 /* resend last asconf ack */
3279 sctp_send_asconf_ack(stcb);
3281 case SCTP_IFORWARD_CUM_TSN:
3282 case SCTP_FORWARD_CUM_TSN:
3283 send_forward_tsn(stcb, &stcb->asoc);
3285 /* can't do anything with these */
3286 case SCTP_PACKET_DROPPED:
3287 case SCTP_INITIATION_ACK: /* this should not happen */
3288 case SCTP_HEARTBEAT_ACK:
3289 case SCTP_ABORT_ASSOCIATION:
3290 case SCTP_OPERATION_ERROR:
3291 case SCTP_SHUTDOWN_COMPLETE:
3301 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3307 * We set things to 0xffffffff since this is the last delivered
3308 * sequence and we will be sending in 0 after the reset.
3311 if (number_entries) {
3312 for (i = 0; i < number_entries; i++) {
3313 temp = ntohs(list[i]);
3314 if (temp >= stcb->asoc.streamincnt) {
3317 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3321 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3322 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3325 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3329 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3334 if (number_entries > 0) {
3335 for (i = 0; i < number_entries; i++) {
3336 temp = ntohs(list[i]);
3337 if (temp >= stcb->asoc.streamoutcnt) {
3338 /* no such stream */
3341 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3342 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3345 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3346 stcb->asoc.strmout[i].next_mid_ordered = 0;
3347 stcb->asoc.strmout[i].next_mid_unordered = 0;
3350 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3354 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3359 if (number_entries > 0) {
3360 for (i = 0; i < number_entries; i++) {
3361 temp = ntohs(list[i]);
3362 if (temp >= stcb->asoc.streamoutcnt) {
3363 /* no such stream */
3366 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3369 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3370 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3375 struct sctp_stream_reset_request *
3376 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3378 struct sctp_association *asoc;
3379 struct sctp_chunkhdr *ch;
3380 struct sctp_stream_reset_request *r;
3381 struct sctp_tmit_chunk *chk;
3385 chk = asoc->str_reset;
3386 if (TAILQ_EMPTY(&asoc->control_send_queue) ||
3388 asoc->stream_reset_outstanding = 0;
3391 if (chk->data == NULL) {
3395 /* he wants a copy of the chk pointer */
3398 clen = chk->send_size;
3399 ch = mtod(chk->data, struct sctp_chunkhdr *);
3400 r = (struct sctp_stream_reset_request *)(ch + 1);
3401 if (ntohl(r->request_seq) == seq) {
3405 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3406 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3407 /* move to the next one, there can only be a max of two */
3408 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3409 if (ntohl(r->request_seq) == seq) {
3413 /* that seq is not here */
3418 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3420 struct sctp_association *asoc;
3421 struct sctp_tmit_chunk *chk;
3424 chk = asoc->str_reset;
3428 asoc->str_reset = NULL;
3429 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3430 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3431 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3432 asoc->ctrl_queue_cnt--;
3434 sctp_m_freem(chk->data);
3437 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3441 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3442 uint32_t seq, uint32_t action,
3443 struct sctp_stream_reset_response *respin)
3447 struct sctp_association *asoc = &stcb->asoc;
3448 struct sctp_tmit_chunk *chk;
3449 struct sctp_stream_reset_request *req_param;
3450 struct sctp_stream_reset_out_request *req_out_param;
3451 struct sctp_stream_reset_in_request *req_in_param;
3452 uint32_t number_entries;
3454 if (asoc->stream_reset_outstanding == 0) {
3458 if (seq == stcb->asoc.str_reset_seq_out) {
3459 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3460 if (req_param != NULL) {
3461 stcb->asoc.str_reset_seq_out++;
3462 type = ntohs(req_param->ph.param_type);
3463 lparam_len = ntohs(req_param->ph.param_length);
3464 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3467 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3468 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3469 asoc->stream_reset_out_is_outstanding = 0;
3470 if (asoc->stream_reset_outstanding)
3471 asoc->stream_reset_outstanding--;
3472 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3474 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3475 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3476 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3477 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3479 * Set it up so we don't stop
3482 asoc->stream_reset_outstanding++;
3483 stcb->asoc.str_reset_seq_out--;
3484 asoc->stream_reset_out_is_outstanding = 1;
3487 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3489 if (no_clear == 0) {
3490 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3492 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3493 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3494 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3495 if (asoc->stream_reset_outstanding)
3496 asoc->stream_reset_outstanding--;
3497 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3498 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3499 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3500 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3501 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3502 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3504 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3505 /* Ok we now may have more streams */
3508 num_stream = stcb->asoc.strm_pending_add_size;
3509 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3511 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3513 stcb->asoc.strm_pending_add_size = 0;
3514 if (asoc->stream_reset_outstanding)
3515 asoc->stream_reset_outstanding--;
3516 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3517 /* Put the new streams into effect */
3520 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3521 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3523 asoc->streamoutcnt += num_stream;
3524 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3525 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3526 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3527 SCTP_STREAM_CHANGE_DENIED);
3529 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3530 SCTP_STREAM_CHANGE_FAILED);
3532 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3533 if (asoc->stream_reset_outstanding)
3534 asoc->stream_reset_outstanding--;
3535 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3536 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3537 SCTP_STREAM_CHANGE_DENIED);
3538 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3539 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3540 SCTP_STREAM_CHANGE_FAILED);
3542 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3544 * a) Adopt the new in tsn.
3546 * c) Adopt the new out-tsn
3548 struct sctp_stream_reset_response_tsn *resp;
3549 struct sctp_forward_tsn_chunk fwdtsn;
3552 if (respin == NULL) {
3556 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3559 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3560 resp = (struct sctp_stream_reset_response_tsn *)respin;
3561 asoc->stream_reset_outstanding--;
3562 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3563 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3564 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3565 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3569 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3570 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3571 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3574 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3575 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3576 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3578 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3579 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3581 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3582 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3584 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3585 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3586 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3587 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3588 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3589 SCTP_ASSOC_RESET_DENIED);
3591 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3592 SCTP_ASSOC_RESET_FAILED);
3595 /* get rid of the request and get the request flags */
3596 if (asoc->stream_reset_outstanding == 0) {
3597 sctp_clean_up_stream_reset(stcb);
3601 if (asoc->stream_reset_outstanding == 0) {
3602 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3608 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3609 struct sctp_tmit_chunk *chk,
3610 struct sctp_stream_reset_in_request *req, int trunc)
3618 * peer wants me to send a str-reset to him for my outgoing seq's if
3621 struct sctp_association *asoc = &stcb->asoc;
3623 seq = ntohl(req->request_seq);
3624 if (asoc->str_reset_seq_in == seq) {
3625 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3626 if ((asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ) == 0) {
3627 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3629 /* Can't do it, since they exceeded our buffer size */
3630 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3631 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3632 len = ntohs(req->ph.param_length);
3633 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3634 if (number_entries) {
3635 for (i = 0; i < number_entries; i++) {
3636 temp = ntohs(req->list_of_streams[i]);
3637 if (temp >= stcb->asoc.streamoutcnt) {
3638 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3641 req->list_of_streams[i] = temp;
3643 for (i = 0; i < number_entries; i++) {
3644 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3645 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3650 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3651 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3652 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3655 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3657 /* Can't do it, since we have sent one out */
3658 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3661 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3662 asoc->str_reset_seq_in++;
3663 } else if (asoc->str_reset_seq_in - 1 == seq) {
3664 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3665 } else if (asoc->str_reset_seq_in - 2 == seq) {
3666 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3668 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3670 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3674 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3675 struct sctp_tmit_chunk *chk,
3676 struct sctp_stream_reset_tsn_request *req)
3678 /* reset all in and out and update the tsn */
3680 * A) reset my str-seq's on in and out. B) Select a receive next,
3681 * and set cum-ack to it. Also process this selected number as a
3682 * fwd-tsn as well. C) set in the response my next sending seq.
3684 struct sctp_forward_tsn_chunk fwdtsn;
3685 struct sctp_association *asoc = &stcb->asoc;
3689 seq = ntohl(req->request_seq);
3690 if (asoc->str_reset_seq_in == seq) {
3691 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3692 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3693 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3695 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3696 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3697 fwdtsn.ch.chunk_flags = 0;
3698 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3699 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3703 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3704 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3705 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3707 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3708 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3709 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3710 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3711 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3712 atomic_add_int(&asoc->sending_seq, 1);
3713 /* save off historical data for retrans */
3714 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3715 asoc->last_sending_seq[0] = asoc->sending_seq;
3716 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3717 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3718 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3719 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3720 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3721 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3723 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3724 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3725 asoc->str_reset_seq_in++;
3726 } else if (asoc->str_reset_seq_in - 1 == seq) {
3727 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3728 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3729 } else if (asoc->str_reset_seq_in - 2 == seq) {
3730 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3731 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3733 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3739 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3740 struct sctp_tmit_chunk *chk,
3741 struct sctp_stream_reset_out_request *req, int trunc)
3744 int number_entries, len;
3745 struct sctp_association *asoc = &stcb->asoc;
3747 seq = ntohl(req->request_seq);
3749 /* now if its not a duplicate we process it */
3750 if (asoc->str_reset_seq_in == seq) {
3751 len = ntohs(req->ph.param_length);
3752 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3754 * the sender is resetting, handle the list issue.. we must
3755 * a) verify if we can do the reset, if so no problem b) If
3756 * we can't do the reset we must copy the request. c) queue
3757 * it, and setup the data in processor to trigger it off
3758 * when needed and dequeue all the queued data.
3760 tsn = ntohl(req->send_reset_at_tsn);
3762 /* move the reset action back one */
3763 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3764 if ((asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ) == 0) {
3765 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3767 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3768 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3769 /* we can do it now */
3770 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3771 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3774 * we must queue it up and thus wait for the TSN's
3775 * to arrive that are at or before tsn
3777 struct sctp_stream_reset_list *liste;
3780 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3781 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3782 siz, SCTP_M_STRESET);
3783 if (liste == NULL) {
3784 /* gak out of memory */
3785 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3786 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3791 liste->number_entries = number_entries;
3792 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3793 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3794 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3796 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3797 asoc->str_reset_seq_in++;
3798 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3800 * one seq back, just echo back last action since my
3801 * response was lost.
3803 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3804 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3806 * two seq back, just echo back last action since my
3807 * response was lost.
3809 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3811 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3816 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3817 struct sctp_stream_reset_add_strm *str_add)
3820 * Peer is requesting to add more streams. If its within our
3821 * max-streams we will allow it.
3823 uint32_t num_stream, i;
3825 struct sctp_association *asoc = &stcb->asoc;
3826 struct sctp_queued_to_read *ctl, *nctl;
3828 /* Get the number. */
3829 seq = ntohl(str_add->request_seq);
3830 num_stream = ntohs(str_add->number_of_streams);
3831 /* Now what would be the new total? */
3832 if (asoc->str_reset_seq_in == seq) {
3833 num_stream += stcb->asoc.streamincnt;
3834 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3835 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3836 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3837 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3838 (num_stream > 0xffff)) {
3839 /* We must reject it they ask for to many */
3841 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3843 /* Ok, we can do that :-) */
3844 struct sctp_stream_in *oldstrm;
3846 /* save off the old */
3847 oldstrm = stcb->asoc.strmin;
3848 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3849 (num_stream * sizeof(struct sctp_stream_in)),
3851 if (stcb->asoc.strmin == NULL) {
3852 stcb->asoc.strmin = oldstrm;
3855 /* copy off the old data */
3856 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3857 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3858 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3859 stcb->asoc.strmin[i].sid = i;
3860 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3861 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3862 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3863 /* now anything on those queues? */
3864 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3865 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3866 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3868 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3869 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3870 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3873 /* Init the new streams */
3874 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3875 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3876 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3877 stcb->asoc.strmin[i].sid = i;
3878 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3879 stcb->asoc.strmin[i].pd_api_started = 0;
3880 stcb->asoc.strmin[i].delivery_started = 0;
3882 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3883 /* update the size */
3884 stcb->asoc.streamincnt = num_stream;
3885 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3886 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3888 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3889 asoc->str_reset_seq_in++;
3890 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3892 * one seq back, just echo back last action since my
3893 * response was lost.
3895 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3896 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3898 * two seq back, just echo back last action since my
3899 * response was lost.
3901 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3903 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3908 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3909 struct sctp_stream_reset_add_strm *str_add)
3912 * Peer is requesting to add more streams. If its within our
3913 * max-streams we will allow it.
3915 uint16_t num_stream;
3917 struct sctp_association *asoc = &stcb->asoc;
3919 /* Get the number. */
3920 seq = ntohl(str_add->request_seq);
3921 num_stream = ntohs(str_add->number_of_streams);
3922 /* Now what would be the new total? */
3923 if (asoc->str_reset_seq_in == seq) {
3924 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3925 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3926 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3927 } else if (stcb->asoc.stream_reset_outstanding) {
3928 /* We must reject it we have something pending */
3929 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3931 /* Ok, we can do that :-) */
3934 mychk = stcb->asoc.streamoutcnt;
3935 mychk += num_stream;
3936 if (mychk < 0x10000) {
3937 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3938 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3939 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3942 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3945 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3946 asoc->str_reset_seq_in++;
3947 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3949 * one seq back, just echo back last action since my
3950 * response was lost.
3952 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3953 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3955 * two seq back, just echo back last action since my
3956 * response was lost.
3958 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3960 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3965 __attribute__((noinline))
3968 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3969 struct sctp_chunkhdr *ch_req)
3971 uint16_t remaining_length, param_len, ptype;
3972 struct sctp_paramhdr pstore;
3973 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3977 struct sctp_tmit_chunk *chk;
3978 struct sctp_chunkhdr *ch;
3979 struct sctp_paramhdr *ph;
3983 /* now it may be a reset or a reset-response */
3984 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3986 /* setup for adding the response */
3987 sctp_alloc_a_chunk(stcb, chk);
3991 chk->copy_by_ref = 0;
3992 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
3993 chk->rec.chunk_id.can_take_data = 0;
3995 chk->asoc = &stcb->asoc;
3996 chk->no_fr_allowed = 0;
3997 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
3998 chk->book_size_scale = 0;
3999 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4000 if (chk->data == NULL) {
4003 sctp_m_freem(chk->data);
4006 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4009 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4011 /* setup chunk parameters */
4012 chk->sent = SCTP_DATAGRAM_UNSENT;
4016 ch = mtod(chk->data, struct sctp_chunkhdr *);
4017 ch->chunk_type = SCTP_STREAM_RESET;
4018 ch->chunk_flags = 0;
4019 ch->chunk_length = htons(chk->send_size);
4020 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4021 offset += sizeof(struct sctp_chunkhdr);
4022 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4023 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4028 param_len = ntohs(ph->param_length);
4029 if ((param_len > remaining_length) ||
4030 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4031 /* bad parameter length */
4034 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4035 (uint8_t *)&cstore);
4040 ptype = ntohs(ph->param_type);
4042 if (param_len > sizeof(cstore)) {
4047 if (num_param > SCTP_MAX_RESET_PARAMS) {
4048 /* hit the max of parameters already sorry.. */
4051 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4052 struct sctp_stream_reset_out_request *req_out;
4054 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4057 req_out = (struct sctp_stream_reset_out_request *)ph;
4059 if (stcb->asoc.stream_reset_outstanding) {
4060 seq = ntohl(req_out->response_seq);
4061 if (seq == stcb->asoc.str_reset_seq_out) {
4063 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4066 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4067 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4068 struct sctp_stream_reset_add_strm *str_add;
4070 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4073 str_add = (struct sctp_stream_reset_add_strm *)ph;
4075 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4076 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4077 struct sctp_stream_reset_add_strm *str_add;
4079 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4082 str_add = (struct sctp_stream_reset_add_strm *)ph;
4084 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4085 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4086 struct sctp_stream_reset_in_request *req_in;
4089 req_in = (struct sctp_stream_reset_in_request *)ph;
4090 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4091 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4092 struct sctp_stream_reset_tsn_request *req_tsn;
4095 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4096 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4098 goto strres_nochunk;
4102 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4103 struct sctp_stream_reset_response *resp;
4106 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4109 resp = (struct sctp_stream_reset_response *)ph;
4110 seq = ntohl(resp->response_seq);
4111 result = ntohl(resp->result);
4112 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4114 goto strres_nochunk;
4119 offset += SCTP_SIZE32(param_len);
4120 if (remaining_length >= SCTP_SIZE32(param_len)) {
4121 remaining_length -= SCTP_SIZE32(param_len);
4123 remaining_length = 0;
4127 /* we have no response free the stuff */
4128 goto strres_nochunk;
4130 /* ok we have a chunk to link in */
4131 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4134 stcb->asoc.ctrl_queue_cnt++;
4139 * Handle a router or endpoints report of a packet loss, there are two ways
4140 * to handle this, either we get the whole packet and must disect it
4141 * ourselves (possibly with truncation and or corruption) or it is a summary
4142 * from a middle box that did the disecting for us.
4145 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4146 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4148 struct sctp_chunk_desc desc;
4149 struct sctp_chunkhdr *chk_hdr;
4150 struct sctp_data_chunk *data_chunk;
4151 struct sctp_idata_chunk *idata_chunk;
4152 uint32_t bottle_bw, on_queue;
4153 uint32_t offset, chk_len;
4154 uint16_t pktdrp_len;
4155 uint8_t pktdrp_flags;
4157 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4158 ("PKTDROP chunk too small"));
4159 pktdrp_flags = cp->ch.chunk_flags;
4160 pktdrp_len = ntohs(cp->ch.chunk_length);
4161 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4162 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4163 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4164 /* The peer plays games with us. */
4168 limit -= sizeof(struct sctp_pktdrop_chunk);
4170 if (offset == limit) {
4171 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4172 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4174 } else if (offset + sizeof(struct sctphdr) > limit) {
4175 /* Only a partial SCTP common header. */
4176 SCTP_STAT_INCR(sctps_pdrpcrupt);
4179 /* XXX: Check embedded SCTP common header. */
4180 offset += sizeof(struct sctphdr);
4182 /* Now parse through the chunks themselves. */
4183 while (offset < limit) {
4184 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4185 SCTP_STAT_INCR(sctps_pdrpcrupt);
4188 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4189 desc.chunk_type = chk_hdr->chunk_type;
4190 /* get amount we need to move */
4191 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4192 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4193 /* Someone is lying... */
4196 if (desc.chunk_type == SCTP_DATA) {
4197 if (stcb->asoc.idata_supported) {
4198 /* Some is playing games with us. */
4201 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4202 /* Some is playing games with us. */
4205 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4207 * Not enough data bytes available in the
4210 SCTP_STAT_INCR(sctps_pdrpnedat);
4213 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4214 /* Not enough data in buffer. */
4217 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4218 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4219 desc.tsn_ifany = data_chunk->dp.tsn;
4220 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4221 SCTP_STAT_INCR(sctps_pdrpmbda);
4223 } else if (desc.chunk_type == SCTP_IDATA) {
4224 if (!stcb->asoc.idata_supported) {
4225 /* Some is playing games with us. */
4228 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4229 /* Some is playing games with us. */
4232 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4234 * Not enough data bytes available in the
4237 SCTP_STAT_INCR(sctps_pdrpnedat);
4240 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4241 /* Not enough data in buffer. */
4244 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4245 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4246 desc.tsn_ifany = idata_chunk->dp.tsn;
4247 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4248 SCTP_STAT_INCR(sctps_pdrpmbda);
4251 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4252 SCTP_STAT_INCR(sctps_pdrpmbct);
4255 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4256 SCTP_STAT_INCR(sctps_pdrppdbrk);
4260 offset += SCTP_SIZE32(chk_len);
4262 /* Now update any rwnd --- possibly */
4263 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4264 /* From a peer, we get a rwnd report */
4267 SCTP_STAT_INCR(sctps_pdrpfehos);
4269 bottle_bw = ntohl(cp->bottle_bw);
4270 on_queue = ntohl(cp->current_onq);
4271 if (bottle_bw && on_queue) {
4272 /* a rwnd report is in here */
4273 if (bottle_bw > on_queue)
4274 a_rwnd = bottle_bw - on_queue;
4279 stcb->asoc.peers_rwnd = 0;
4281 if (a_rwnd > stcb->asoc.total_flight) {
4282 stcb->asoc.peers_rwnd =
4283 a_rwnd - stcb->asoc.total_flight;
4285 stcb->asoc.peers_rwnd = 0;
4287 if (stcb->asoc.peers_rwnd <
4288 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4289 /* SWS sender side engages */
4290 stcb->asoc.peers_rwnd = 0;
4295 SCTP_STAT_INCR(sctps_pdrpfmbox);
4298 /* now middle boxes in sat networks get a cwnd bump */
4299 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4300 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4301 (stcb->asoc.sat_network)) {
4303 * This is debatable but for sat networks it makes sense
4304 * Note if a T3 timer has went off, we will prohibit any
4305 * changes to cwnd until we exit the t3 loss recovery.
4307 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4308 net, cp, &bottle_bw, &on_queue);
4313 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4314 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4315 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4316 * length of the complete packet outputs: - length: modified to remaining
4317 * length after control processing - netp: modified to new sctp_nets after
4318 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4319 * bad packet,...) otherwise return the tcb for this packet
4322 __attribute__((noinline))
4324 static struct sctp_tcb *
4325 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4326 struct sockaddr *src, struct sockaddr *dst,
4327 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4328 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4329 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4330 uint32_t vrf_id, uint16_t port)
4332 struct sctp_association *asoc;
4333 struct mbuf *op_err;
4334 char msg[SCTP_DIAG_INFO_LEN];
4336 int num_chunks = 0; /* number of control chunks processed */
4337 uint32_t chk_length, contiguous;
4339 int abort_no_unlock = 0;
4344 * How big should this be, and should it be alloc'd? Lets try the
4345 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4346 * until we get into jumbo grams and such..
4348 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4350 uint32_t auth_offset = 0, auth_len = 0;
4351 int auth_skipped = 0;
4354 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4355 iphlen, *offset, length, (void *)stcb);
4358 SCTP_TCB_LOCK_ASSERT(stcb);
4360 /* validate chunk header length... */
4361 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4362 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4363 ntohs(ch->chunk_length));
4368 * validate the verification tag
4370 vtag_in = ntohl(sh->v_tag);
4372 if (ch->chunk_type == SCTP_INITIATION) {
4373 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4374 ntohs(ch->chunk_length), vtag_in);
4376 /* protocol error- silently discard... */
4377 SCTP_STAT_INCR(sctps_badvtag);
4379 SCTP_TCB_UNLOCK(stcb);
4383 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4385 * If there is no stcb, skip the AUTH chunk and process
4386 * later after a stcb is found (to validate the lookup was
4389 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4391 (inp->auth_supported == 1)) {
4392 /* save this chunk for later processing */
4394 auth_offset = *offset;
4395 auth_len = ntohs(ch->chunk_length);
4397 /* (temporarily) move past this chunk */
4398 *offset += SCTP_SIZE32(auth_len);
4399 if (*offset >= length) {
4400 /* no more data left in the mbuf chain */
4404 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4405 sizeof(struct sctp_chunkhdr), chunk_buf);
4412 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4413 goto process_control_chunks;
4416 * first check if it's an ASCONF with an unknown src addr we
4417 * need to look inside to find the association
4419 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4420 struct sctp_chunkhdr *asconf_ch = ch;
4421 uint32_t asconf_offset = 0, asconf_len = 0;
4423 /* inp's refcount may be reduced */
4424 SCTP_INP_INCR_REF(inp);
4426 asconf_offset = *offset;
4428 asconf_len = ntohs(asconf_ch->chunk_length);
4429 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4431 stcb = sctp_findassociation_ep_asconf(m,
4434 sh, &inp, netp, vrf_id);
4437 asconf_offset += SCTP_SIZE32(asconf_len);
4438 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4439 sizeof(struct sctp_chunkhdr), chunk_buf);
4440 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4443 * reduce inp's refcount if not reduced in
4444 * sctp_findassociation_ep_asconf().
4446 SCTP_INP_DECR_REF(inp);
4449 /* now go back and verify any auth chunk to be sure */
4450 if (auth_skipped && (stcb != NULL)) {
4451 struct sctp_auth_chunk *auth;
4453 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4454 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4460 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4462 /* auth HMAC failed so dump it */
4466 /* remaining chunks are HMAC checked */
4467 stcb->asoc.authenticated = 1;
4472 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4473 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4475 /* no association, so it's out of the blue... */
4476 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4477 mflowtype, mflowid, inp->fibnum,
4483 /* ABORT and SHUTDOWN can use either v_tag... */
4484 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4485 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4486 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4487 /* Take the T-bit always into account. */
4488 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4489 (vtag_in == asoc->my_vtag)) ||
4490 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4491 (asoc->peer_vtag != htonl(0)) &&
4492 (vtag_in == asoc->peer_vtag))) {
4495 /* drop this packet... */
4496 SCTP_STAT_INCR(sctps_badvtag);
4498 SCTP_TCB_UNLOCK(stcb);
4503 /* for all other chunks, vtag must match */
4504 if (vtag_in != asoc->my_vtag) {
4505 /* invalid vtag... */
4506 SCTPDBG(SCTP_DEBUG_INPUT3,
4507 "invalid vtag: %xh, expect %xh\n",
4508 vtag_in, asoc->my_vtag);
4509 SCTP_STAT_INCR(sctps_badvtag);
4511 SCTP_TCB_UNLOCK(stcb);
4517 } /* end if !SCTP_COOKIE_ECHO */
4519 * process all control chunks...
4521 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4522 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4523 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4524 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4525 /* implied cookie-ack.. we must have lost the ack */
4526 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4530 process_control_chunks:
4531 while (IS_SCTP_CONTROL(ch)) {
4532 /* validate chunk length */
4533 chk_length = ntohs(ch->chunk_length);
4534 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4535 ch->chunk_type, chk_length);
4536 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4537 if (chk_length < sizeof(*ch) ||
4538 (*offset + (int)chk_length) > length) {
4542 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4544 * INIT and INIT-ACK only gets the init ack "header" portion
4545 * only because we don't have to process the peer's COOKIE.
4546 * All others get a complete chunk.
4548 switch (ch->chunk_type) {
4549 case SCTP_INITIATION:
4550 contiguous = sizeof(struct sctp_init_chunk);
4552 case SCTP_INITIATION_ACK:
4553 contiguous = sizeof(struct sctp_init_ack_chunk);
4556 contiguous = min(chk_length, sizeof(chunk_buf));
4559 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4568 /* Save off the last place we got a control from */
4570 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4572 * allow last_control to be NULL if
4573 * ASCONF... ASCONF processing will find the
4576 if ((netp != NULL) && (*netp != NULL))
4577 stcb->asoc.last_control_chunk_from = *netp;
4580 #ifdef SCTP_AUDITING_ENABLED
4581 sctp_audit_log(0xB0, ch->chunk_type);
4584 /* check to see if this chunk required auth, but isn't */
4585 if ((stcb != NULL) &&
4586 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4587 !stcb->asoc.authenticated) {
4588 /* "silently" ignore */
4589 SCTP_STAT_INCR(sctps_recvauthmissing);
4592 switch (ch->chunk_type) {
4593 case SCTP_INITIATION:
4594 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4595 /* The INIT chunk must be the only chunk. */
4596 if ((num_chunks > 1) ||
4597 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4599 * RFC 4960bis requires stopping the
4600 * processing of the packet.
4605 /* Honor our resource limit. */
4606 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4607 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4608 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
4609 mflowtype, mflowid, inp->fibnum,
4613 SCTP_TCB_UNLOCK(stcb);
4617 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4618 (struct sctp_init_chunk *)ch, inp,
4624 SCTP_TCB_UNLOCK(stcb);
4628 case SCTP_PAD_CHUNK:
4630 case SCTP_INITIATION_ACK:
4631 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4632 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4633 /* We are not interested anymore */
4634 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4639 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4640 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4645 /* The INIT-ACK chunk must be the only chunk. */
4646 if ((num_chunks > 1) ||
4647 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4651 if ((netp != NULL) && (*netp != NULL)) {
4652 ret = sctp_handle_init_ack(m, iphlen, *offset,
4654 (struct sctp_init_ack_chunk *)ch,
4663 if (abort_no_unlock) {
4667 * Special case, I must call the output routine to
4668 * get the cookie echoed
4670 if ((stcb != NULL) && (ret == 0)) {
4671 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4675 case SCTP_SELECTIVE_ACK:
4676 case SCTP_NR_SELECTIVE_ACK:
4679 uint32_t a_rwnd, cum_ack;
4680 uint16_t num_seg, num_nr_seg, num_dup;
4682 int offset_seg, offset_dup;
4684 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4685 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4686 SCTP_STAT_INCR(sctps_recvsacks);
4688 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4689 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4692 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4693 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4694 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4698 if (stcb->asoc.nrsack_supported == 0) {
4701 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4702 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4706 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4708 * If we have sent a shutdown-ack, we will pay no
4709 * attention to a sack sent in to us since
4710 * we don't care anymore.
4714 flags = ch->chunk_flags;
4715 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4716 struct sctp_sack_chunk *sack;
4718 sack = (struct sctp_sack_chunk *)ch;
4719 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4720 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4722 num_dup = ntohs(sack->sack.num_dup_tsns);
4723 a_rwnd = ntohl(sack->sack.a_rwnd);
4724 if (sizeof(struct sctp_sack_chunk) +
4725 num_seg * sizeof(struct sctp_gap_ack_block) +
4726 num_dup * sizeof(uint32_t) != chk_length) {
4727 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4730 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4731 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4733 struct sctp_nr_sack_chunk *nr_sack;
4735 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4736 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4737 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4738 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4739 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4740 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4741 if (sizeof(struct sctp_nr_sack_chunk) +
4742 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4743 num_dup * sizeof(uint32_t) != chk_length) {
4744 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4747 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4748 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4750 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4751 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4752 cum_ack, num_seg, a_rwnd);
4753 stcb->asoc.seen_a_sack_this_pkt = 1;
4754 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4755 (num_seg == 0) && (num_nr_seg == 0) &&
4756 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4757 (stcb->asoc.saw_sack_with_frags == 0) &&
4758 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4759 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4761 * We have a SIMPLE sack having no
4762 * prior segments and data on sent
4763 * queue to be acked. Use the faster
4764 * path sack processing. We also
4765 * allow window update sacks with no
4766 * missing segments to go this way
4769 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4770 &abort_now, ecne_seen);
4772 if ((netp != NULL) && (*netp != NULL)) {
4773 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4774 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4775 cum_ack, a_rwnd, ecne_seen);
4779 /* ABORT signal from sack processing */
4783 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4784 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4785 (stcb->asoc.stream_queue_cnt == 0)) {
4786 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4790 case SCTP_HEARTBEAT_REQUEST:
4791 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4792 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4793 SCTP_STAT_INCR(sctps_recvheartbeat);
4794 sctp_send_heartbeat_ack(stcb, m, *offset,
4798 case SCTP_HEARTBEAT_ACK:
4799 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4800 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4804 SCTP_STAT_INCR(sctps_recvheartbeatack);
4805 if ((netp != NULL) && (*netp != NULL)) {
4806 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4810 case SCTP_ABORT_ASSOCIATION:
4811 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4814 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4815 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4825 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4827 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4830 if ((netp != NULL) && (*netp != NULL)) {
4832 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4833 stcb, *netp, &abort_flag);
4840 case SCTP_SHUTDOWN_ACK:
4841 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4842 if ((chk_length == sizeof(struct sctp_shutdown_ack_chunk)) &&
4843 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4844 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4849 case SCTP_OPERATION_ERROR:
4850 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4851 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4852 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4857 case SCTP_COOKIE_ECHO:
4858 SCTPDBG(SCTP_DEBUG_INPUT3,
4859 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4860 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4863 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4864 /* We are not interested anymore */
4867 SCTP_TCB_UNLOCK(stcb);
4874 * First are we accepting? We do this again here
4875 * since it is possible that a previous endpoint WAS
4876 * listening responded to a INIT-ACK and then
4877 * closed. We opened and bound.. and are now no
4880 * XXXGL: notes on checking listen queue length.
4881 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4882 * SOLISTENING(), because a listening "UDP type"
4883 * socket isn't listening in terms of the socket
4884 * layer. It is a normal data flow socket, that
4885 * can fork off new connections. Thus, we should
4886 * look into sol_qlen only in case we are !UDP.
4887 * 2) Checking sol_qlen in general requires locking
4888 * the socket, and this code lacks that.
4890 if ((stcb == NULL) &&
4891 (!SCTP_IS_LISTENING(inp) ||
4892 (((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) == 0) &&
4893 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4894 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4895 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4896 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4897 sctp_abort_association(inp, stcb, m, iphlen,
4898 src, dst, sh, op_err,
4905 struct mbuf *ret_buf;
4906 struct sctp_inpcb *linp;
4907 struct sctp_tmit_chunk *chk;
4909 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
4910 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4921 SCTP_ASOC_CREATE_LOCK(linp);
4925 struct sctp_tcb *locked_stcb;
4929 sctp_handle_cookie_echo(m, iphlen,
4933 (struct sctp_cookie_echo_chunk *)ch,
4943 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4944 SCTP_TCB_UNLOCK(locked_stcb);
4947 SCTP_TCB_LOCK_ASSERT(stcb);
4953 SCTP_ASOC_CREATE_UNLOCK(linp);
4955 if (ret_buf == NULL) {
4957 SCTP_TCB_UNLOCK(stcb);
4959 SCTPDBG(SCTP_DEBUG_INPUT3,
4960 "GAK, null buffer\n");
4964 /* if AUTH skipped, see if it verified... */
4969 /* Restart the timer if we have pending data */
4970 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4971 if (chk->whoTo != NULL) {
4976 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4980 case SCTP_COOKIE_ACK:
4981 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4982 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4985 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4986 /* We are not interested anymore */
4987 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4990 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4991 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
4996 if ((netp != NULL) && (*netp != NULL)) {
4997 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5001 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
5005 if (stcb->asoc.ecn_supported == 0) {
5008 if ((chk_length != sizeof(struct sctp_ecne_chunk)) &&
5009 (chk_length != sizeof(struct old_sctp_ecne_chunk))) {
5012 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5016 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5020 if (stcb->asoc.ecn_supported == 0) {
5023 if (chk_length != sizeof(struct sctp_cwr_chunk)) {
5026 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5028 case SCTP_SHUTDOWN_COMPLETE:
5029 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5030 /* must be first and only chunk */
5031 if ((num_chunks > 1) ||
5032 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5036 if ((chk_length == sizeof(struct sctp_shutdown_complete_chunk)) &&
5037 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5038 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5045 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5047 if (stcb->asoc.asconf_supported == 0) {
5050 sctp_handle_asconf(m, *offset, src,
5051 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5055 case SCTP_ASCONF_ACK:
5056 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5060 if (stcb->asoc.asconf_supported == 0) {
5063 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5066 if ((netp != NULL) && (*netp != NULL)) {
5067 /* He's alive so give him credit */
5068 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5069 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5070 stcb->asoc.overall_error_count,
5072 SCTP_FROM_SCTP_INPUT,
5075 stcb->asoc.overall_error_count = 0;
5076 sctp_handle_asconf_ack(m, *offset,
5077 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5078 if (abort_no_unlock)
5082 case SCTP_FORWARD_CUM_TSN:
5083 case SCTP_IFORWARD_CUM_TSN:
5084 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5085 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5089 if (stcb->asoc.prsctp_supported == 0) {
5092 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5095 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5096 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5097 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5098 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5100 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5102 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5103 sctp_abort_an_association(inp, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
5108 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5109 /* We are not interested anymore */
5110 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5111 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5116 * For sending a SACK this looks like DATA chunks.
5118 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5120 sctp_handle_forward_tsn(stcb,
5121 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5127 case SCTP_STREAM_RESET:
5128 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5132 if (stcb->asoc.reconfig_supported == 0) {
5135 if (chk_length < sizeof(struct sctp_stream_reset_tsn_req)) {
5138 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5139 /* stop processing */
5144 case SCTP_PACKET_DROPPED:
5145 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5149 if (stcb->asoc.pktdrop_supported == 0) {
5152 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5155 if ((netp != NULL) && (*netp != NULL)) {
5156 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5158 min(chk_length, contiguous));
5161 case SCTP_AUTHENTICATION:
5162 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5164 /* save the first AUTH for later processing */
5165 if (auth_skipped == 0) {
5166 auth_offset = *offset;
5167 auth_len = chk_length;
5170 /* skip this chunk (temporarily) */
5173 if (stcb->asoc.auth_supported == 0) {
5176 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5177 (chk_length > (sizeof(struct sctp_auth_chunk) +
5178 SCTP_AUTH_DIGEST_LEN_MAX))) {
5183 if (got_auth == 1) {
5184 /* skip this chunk... it's already auth'd */
5188 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5189 /* auth HMAC failed so dump the packet */
5193 /* remaining chunks are HMAC checked */
5194 stcb->asoc.authenticated = 1;
5200 /* it's an unknown chunk! */
5201 if ((ch->chunk_type & 0x40) &&
5203 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5204 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5205 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5206 struct sctp_gen_error_cause *cause;
5209 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5210 0, M_NOWAIT, 1, MT_DATA);
5211 if (op_err != NULL) {
5212 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5213 cause = mtod(op_err, struct sctp_gen_error_cause *);
5214 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5215 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5216 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5217 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5218 if (SCTP_BUF_NEXT(op_err) != NULL) {
5219 #ifdef SCTP_MBUF_LOGGING
5220 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5221 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5224 sctp_queue_op_err(stcb, op_err);
5226 sctp_m_freem(op_err);
5230 if ((ch->chunk_type & 0x80) == 0) {
5231 /* discard this packet */
5234 } /* else skip this bad chunk and continue... */
5236 } /* switch (ch->chunk_type) */
5239 /* get the next chunk */
5240 *offset += SCTP_SIZE32(chk_length);
5241 if (*offset >= length) {
5242 /* no more data left in the mbuf chain */
5245 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5246 sizeof(struct sctp_chunkhdr), chunk_buf);
5253 if ((asconf_cnt > 0) && (stcb != NULL)) {
5254 sctp_send_asconf_ack(stcb);
5260 * common input chunk processing (v4 and v6)
5263 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5264 struct sockaddr *src, struct sockaddr *dst,
5265 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5266 uint8_t compute_crc,
5268 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5269 uint32_t vrf_id, uint16_t port)
5271 char msg[SCTP_DIAG_INFO_LEN];
5272 struct mbuf *m = *mm, *op_err;
5273 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5274 struct sctp_tcb *stcb = NULL;
5275 struct sctp_nets *net = NULL;
5277 uint32_t cksum_in_hdr;
5279 int cnt_ctrl_ready = 0;
5280 int fwd_tsn_seen = 0, data_processed = 0;
5281 bool cksum_validated, stcb_looked_up;
5283 SCTP_STAT_INCR(sctps_recvdatagrams);
5284 #ifdef SCTP_AUDITING_ENABLED
5285 sctp_audit_log(0xE0, 1);
5286 sctp_auditing(0, inp, stcb, net);
5289 stcb_looked_up = false;
5290 if (compute_crc != 0) {
5291 cksum_validated = false;
5292 cksum_in_hdr = sh->checksum;
5293 if (cksum_in_hdr != htonl(0)) {
5294 uint32_t cksum_calculated;
5298 cksum_calculated = sctp_calculate_cksum(m, iphlen);
5299 sh->checksum = cksum_in_hdr;
5300 if (cksum_calculated != cksum_in_hdr) {
5301 if (stcb_looked_up) {
5303 * The packet has a zero checksum,
5304 * which is not the correct CRC, no
5305 * stcb has been found or an stcb
5306 * has been found but an incorrect
5307 * zero checksum is not acceptable.
5309 KASSERT(cksum_in_hdr == htonl(0),
5310 ("cksum in header not zero: %x",
5311 ntohl(cksum_in_hdr)));
5312 if ((inp == NULL) &&
5313 (SCTP_BASE_SYSCTL(sctp_ootb_with_zero_cksum) == 1)) {
5315 * This is an OOTB packet,
5316 * depending on the sysctl
5317 * variable, pretend that
5319 * acceptable, to allow an
5320 * appropriate response
5321 * (ABORT, for examlpe) to
5324 KASSERT(stcb == NULL,
5325 ("stcb is %p", stcb));
5326 SCTP_STAT_INCR(sctps_recvzerocrc);
5327 goto cksum_validated;
5330 stcb = sctp_findassociation_addr(m, offset, src, dst,
5331 sh, ch, &inp, &net, vrf_id);
5333 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad cksum in SCTP packet:%x calculated:%x m:%p mlen:%d iphlen:%d\n",
5334 ntohl(cksum_in_hdr), ntohl(cksum_calculated), (void *)m, length, iphlen);
5335 #if defined(INET) || defined(INET6)
5336 if ((ch->chunk_type != SCTP_INITIATION) &&
5337 (net != NULL) && (net->port != port)) {
5338 if (net->port == 0) {
5340 * UDP encapsulation turned
5343 net->mtu -= sizeof(struct udphdr);
5344 if (stcb->asoc.smallest_mtu > net->mtu) {
5345 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5347 } else if (port == 0) {
5349 * UDP encapsulation turned
5352 net->mtu += sizeof(struct udphdr);
5353 /* XXX Update smallest_mtu */
5359 net->flowtype = mflowtype;
5360 net->flowid = mflowid;
5362 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5363 if ((inp != NULL) && (stcb != NULL)) {
5364 if (stcb->asoc.pktdrop_supported) {
5365 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5366 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5368 } else if ((inp != NULL) && (stcb == NULL)) {
5371 SCTP_STAT_INCR(sctps_badsum);
5372 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5375 cksum_validated = true;
5378 KASSERT(cksum_validated || cksum_in_hdr == htonl(0),
5379 ("cksum 0x%08x not zero and not validated", ntohl(cksum_in_hdr)));
5380 if (!cksum_validated) {
5381 stcb = sctp_findassociation_addr(m, offset, src, dst,
5382 sh, ch, &inp, &net, vrf_id);
5383 stcb_looked_up = true;
5385 goto validate_cksum;
5387 if (stcb->asoc.rcv_edmid == SCTP_EDMID_NONE) {
5388 goto validate_cksum;
5390 KASSERT(stcb->asoc.rcv_edmid == SCTP_EDMID_LOWER_LAYER_DTLS,
5391 ("Unexpected EDMID %u", stcb->asoc.rcv_edmid));
5392 SCTP_STAT_INCR(sctps_recvzerocrc);
5396 /* Destination port of 0 is illegal, based on RFC4960. */
5397 if (sh->dest_port == htons(0)) {
5398 SCTP_STAT_INCR(sctps_hdrops);
5399 if ((stcb == NULL) && (inp != NULL)) {
5404 if (!stcb_looked_up) {
5405 stcb = sctp_findassociation_addr(m, offset, src, dst,
5406 sh, ch, &inp, &net, vrf_id);
5408 #if defined(INET) || defined(INET6)
5409 if ((ch->chunk_type != SCTP_INITIATION) &&
5410 (net != NULL) && (net->port != port)) {
5411 if (net->port == 0) {
5412 /* UDP encapsulation turned on. */
5413 net->mtu -= sizeof(struct udphdr);
5414 if (stcb->asoc.smallest_mtu > net->mtu) {
5415 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5417 } else if (port == 0) {
5418 /* UDP encapsulation turned off. */
5419 net->mtu += sizeof(struct udphdr);
5420 /* XXX Update smallest_mtu */
5426 net->flowtype = mflowtype;
5427 net->flowid = mflowid;
5430 SCTP_STAT_INCR(sctps_noport);
5431 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5432 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5435 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5436 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5437 sctp_send_shutdown_complete2(src, dst, sh,
5438 mflowtype, mflowid, fibnum,
5442 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5443 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5446 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5447 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5448 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5449 (ch->chunk_type != SCTP_INIT))) {
5450 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5452 sctp_send_abort(m, iphlen, src, dst,
5454 mflowtype, mflowid, fibnum,
5459 } else if (stcb == NULL) {
5462 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5463 (void *)m, iphlen, offset, length, (void *)stcb);
5465 /* always clear this before beginning a packet */
5466 stcb->asoc.authenticated = 0;
5467 stcb->asoc.seen_a_sack_this_pkt = 0;
5468 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5469 (void *)stcb, stcb->asoc.state);
5471 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5472 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5474 * If we hit here, we had a ref count
5475 * up when the assoc was aborted and the
5476 * timer is clearing out the assoc, we should
5477 * NOT respond to any packet.. its OOTB.
5479 SCTP_TCB_UNLOCK(stcb);
5481 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5482 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5483 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5485 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5486 mflowtype, mflowid, inp->fibnum,
5491 if (IS_SCTP_CONTROL(ch)) {
5492 /* process the control portion of the SCTP packet */
5493 /* sa_ignore NO_NULL_CHK */
5494 stcb = sctp_process_control(m, iphlen, &offset, length,
5496 inp, stcb, &net, &fwd_tsn_seen,
5497 mflowtype, mflowid, fibnum,
5501 * This covers us if the cookie-echo was there and
5502 * it changes our INP.
5504 inp = stcb->sctp_ep;
5505 #if defined(INET) || defined(INET6)
5506 if ((ch->chunk_type != SCTP_INITIATION) &&
5507 (net != NULL) && (net->port != port)) {
5508 if (net->port == 0) {
5509 /* UDP encapsulation turned on. */
5510 net->mtu -= sizeof(struct udphdr);
5511 if (stcb->asoc.smallest_mtu > net->mtu) {
5512 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5514 } else if (port == 0) {
5515 /* UDP encapsulation turned off. */
5516 net->mtu += sizeof(struct udphdr);
5517 /* XXX Update smallest_mtu */
5525 * no control chunks, so pre-process DATA chunks (these
5526 * checks are taken care of by control processing)
5530 * if DATA only packet, and auth is required, then punt...
5531 * can't have authenticated without any AUTH (control)
5534 if ((stcb != NULL) &&
5535 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5536 /* "silently" ignore */
5537 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5538 SCTP_STAT_INCR(sctps_recvauthmissing);
5542 /* out of the blue DATA chunk */
5543 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5544 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5545 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5547 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5548 mflowtype, mflowid, fibnum,
5552 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5553 /* v_tag mismatch! */
5554 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5555 SCTP_STAT_INCR(sctps_badvtag);
5560 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5563 * no valid TCB for this packet, or we found it's a bad
5564 * packet while processing control, or we're done with this
5565 * packet (done or skip rest of data), so we drop it...
5571 * DATA chunk processing
5573 /* plow through the data chunks while length > offset */
5576 * Rest should be DATA only. Check authentication state if AUTH for
5579 if ((length > offset) &&
5581 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5582 !stcb->asoc.authenticated) {
5583 /* "silently" ignore */
5584 SCTP_STAT_INCR(sctps_recvauthmissing);
5585 SCTPDBG(SCTP_DEBUG_AUTH1,
5586 "Data chunk requires AUTH, skipped\n");
5589 if (length > offset) {
5593 * First check to make sure our state is correct. We would
5594 * not get here unless we really did have a tag, so we don't
5595 * abort if this happens, just dump the chunk silently.
5597 switch (SCTP_GET_STATE(stcb)) {
5598 case SCTP_STATE_COOKIE_ECHOED:
5600 * we consider data with valid tags in this state
5601 * shows us the cookie-ack was lost. Imply it was
5604 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5606 case SCTP_STATE_COOKIE_WAIT:
5608 * We consider OOTB any data sent during asoc setup.
5610 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5611 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5613 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5614 mflowtype, mflowid, inp->fibnum,
5617 /* sa_ignore NOTREACHED */
5619 case SCTP_STATE_EMPTY: /* should not happen */
5620 case SCTP_STATE_INUSE: /* should not happen */
5621 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5622 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5625 /* sa_ignore NOTREACHED */
5627 case SCTP_STATE_OPEN:
5628 case SCTP_STATE_SHUTDOWN_SENT:
5631 /* plow through the data chunks while length > offset */
5632 retval = sctp_process_data(mm, iphlen, &offset, length,
5633 inp, stcb, net, &high_tsn);
5636 * The association aborted, NO UNLOCK needed since
5637 * the association is destroyed.
5646 * Anything important needs to have been m_copy'ed in
5651 /* take care of ecn */
5652 if ((data_processed == 1) &&
5653 (stcb->asoc.ecn_supported == 1) &&
5654 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5655 /* Yep, we need to add a ECNE */
5656 sctp_send_ecn_echo(stcb, net, high_tsn);
5659 if ((data_processed == 0) && (fwd_tsn_seen)) {
5661 uint32_t highest_tsn;
5663 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5664 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5666 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5668 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5669 stcb->asoc.send_sack = 1;
5670 sctp_sack_check(stcb, was_a_gap);
5671 } else if (fwd_tsn_seen) {
5672 stcb->asoc.send_sack = 1;
5674 /* trigger send of any chunks in queue... */
5676 #ifdef SCTP_AUDITING_ENABLED
5677 sctp_audit_log(0xE0, 2);
5678 sctp_auditing(1, inp, stcb, net);
5680 SCTPDBG(SCTP_DEBUG_INPUT1,
5681 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5682 stcb->asoc.peers_rwnd,
5683 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5684 stcb->asoc.total_flight);
5685 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5686 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5687 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5689 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5691 stcb->asoc.trigger_reset ||
5693 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5694 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5695 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5696 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5698 #ifdef SCTP_AUDITING_ENABLED
5699 sctp_audit_log(0xE0, 3);
5700 sctp_auditing(2, inp, stcb, net);
5704 SCTP_TCB_UNLOCK(stcb);
5706 if (inp_decr != NULL) {
5707 /* reduce ref-count */
5708 SCTP_INP_WLOCK(inp_decr);
5709 SCTP_INP_DECR_REF(inp_decr);
5710 SCTP_INP_WUNLOCK(inp_decr);
5717 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5721 uint32_t vrf_id = 0;
5723 struct sockaddr_in src, dst;
5726 struct sctp_chunkhdr *ch;
5728 uint8_t compute_crc;
5734 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5735 SCTP_RELEASE_PKT(i_pak);
5738 m = SCTP_HEADER_TO_CHAIN(i_pak);
5739 #ifdef SCTP_MBUF_LOGGING
5740 /* Log in any input mbufs */
5741 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5742 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5745 #ifdef SCTP_PACKET_LOGGING
5746 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5750 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5751 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5753 if_name(m->m_pkthdr.rcvif),
5754 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5755 mflowid = m->m_pkthdr.flowid;
5756 mflowtype = M_HASHTYPE_GET(m);
5757 fibnum = M_GETFIB(m);
5758 SCTP_STAT_INCR(sctps_recvpackets);
5759 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5760 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5761 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5762 if (SCTP_BUF_LEN(m) < offset) {
5763 if ((m = m_pullup(m, offset)) == NULL) {
5764 SCTP_STAT_INCR(sctps_hdrops);
5768 ip = mtod(m, struct ip *);
5769 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5770 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5771 offset -= sizeof(struct sctp_chunkhdr);
5772 memset(&src, 0, sizeof(struct sockaddr_in));
5773 src.sin_family = AF_INET;
5774 src.sin_len = sizeof(struct sockaddr_in);
5775 src.sin_port = sh->src_port;
5776 src.sin_addr = ip->ip_src;
5777 memset(&dst, 0, sizeof(struct sockaddr_in));
5778 dst.sin_family = AF_INET;
5779 dst.sin_len = sizeof(struct sockaddr_in);
5780 dst.sin_port = sh->dest_port;
5781 dst.sin_addr = ip->ip_dst;
5782 length = ntohs(ip->ip_len);
5783 /* Validate mbuf chain length with IP payload length. */
5784 if (SCTP_HEADER_LEN(m) != length) {
5785 SCTPDBG(SCTP_DEBUG_INPUT1,
5786 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5787 SCTP_STAT_INCR(sctps_hdrops);
5790 /* SCTP does not allow broadcasts or multicasts */
5791 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5794 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5797 ecn_bits = ip->ip_tos;
5798 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5799 SCTP_STAT_INCR(sctps_recvhwcrc);
5802 SCTP_STAT_INCR(sctps_recvswcrc);
5805 sctp_common_input_processing(&m, iphlen, offset, length,
5806 (struct sockaddr *)&src,
5807 (struct sockaddr *)&dst,
5811 mflowtype, mflowid, fibnum,
5820 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5821 extern int *sctp_cpuarry;
5825 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5832 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5838 uint32_t flowid, tag;
5840 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5841 flowid = m->m_pkthdr.flowid;
5844 * No flow id built by lower layers fix it so we
5847 offset = off + sizeof(struct sctphdr);
5848 if (SCTP_BUF_LEN(m) < offset) {
5849 if ((m = m_pullup(m, offset)) == NULL) {
5850 SCTP_STAT_INCR(sctps_hdrops);
5851 return (IPPROTO_DONE);
5854 ip = mtod(m, struct ip *);
5855 sh = (struct sctphdr *)((caddr_t)ip + off);
5856 tag = htonl(sh->v_tag);
5857 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5858 m->m_pkthdr.flowid = flowid;
5859 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5861 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5862 sctp_queue_to_mcore(m, off, cpu_to_use);
5863 return (IPPROTO_DONE);
5866 sctp_input_with_port(m, off, 0);
5867 return (IPPROTO_DONE);