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 <netinet/sctp_os.h>
36 #include <netinet/sctp_var.h>
37 #include <netinet/sctp_sysctl.h>
38 #include <netinet/sctp_pcb.h>
39 #include <netinet/sctp_header.h>
40 #include <netinet/sctputil.h>
41 #include <netinet/sctp_output.h>
42 #include <netinet/sctp_input.h>
43 #include <netinet/sctp_auth.h>
44 #include <netinet/sctp_indata.h>
45 #include <netinet/sctp_asconf.h>
46 #include <netinet/sctp_bsd_addr.h>
47 #include <netinet/sctp_timer.h>
48 #include <netinet/sctp_crc32.h>
49 #include <netinet/sctp_kdtrace.h>
50 #if defined(INET) || defined(INET6)
51 #include <netinet/udp.h>
56 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
58 struct sctp_nets *net;
61 * This now not only stops all cookie timers it also stops any INIT
62 * timers as well. This will make sure that the timers are stopped
63 * in all collision cases.
65 SCTP_TCB_LOCK_ASSERT(stcb);
66 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
67 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
68 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
71 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
72 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
73 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
76 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
83 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
84 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
85 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
86 struct sctp_tcb *stcb, struct sctp_nets *net,
87 uint8_t mflowtype, uint32_t mflowid,
88 uint32_t vrf_id, uint16_t port)
90 struct sctp_init *init;
93 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
98 /* Validate parameters */
100 if (ntohl(init->initiate_tag) == 0) {
103 if ((ntohl(init->a_rwnd) < SCTP_MIN_RWND) ||
104 (ntohs(init->num_inbound_streams) == 0) ||
105 (ntohs(init->num_outbound_streams) == 0)) {
106 /* protocol error... send abort */
107 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
108 sctp_send_abort(m, iphlen, src, dst, sh, init->initiate_tag, op_err,
109 mflowtype, mflowid, inp->fibnum,
113 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
114 offset + ntohs(cp->ch.chunk_length))) {
115 /* auth parameter(s) error... send abort */
116 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
117 "Problem with AUTH parameters");
118 sctp_send_abort(m, iphlen, src, dst, sh, init->initiate_tag, op_err,
119 mflowtype, mflowid, inp->fibnum,
123 /* We are only accepting if we have a listening socket. */
124 if ((stcb == NULL) &&
125 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
126 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
127 (!SCTP_IS_LISTENING(inp)))) {
129 * FIX ME ?? What about TCP model and we have a
130 * match/restart case? Actually no fix is needed. the lookup
131 * will always find the existing assoc so stcb would not be
132 * NULL. It may be questionable to do this since we COULD
133 * just send back the INIT-ACK and hope that the app did
134 * accept()'s by the time the COOKIE was sent. But there is
135 * a price to pay for COOKIE generation and I don't want to
136 * pay it on the chance that the app will actually do some
137 * accepts(). The App just looses and should NOT be in this
140 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
141 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
143 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
144 mflowtype, mflowid, inp->fibnum,
149 if ((stcb != NULL) &&
150 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
151 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
152 sctp_send_shutdown_ack(stcb, NULL);
153 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
155 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
156 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
163 SCTP_INP_RUNLOCK(inp);
168 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
172 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked)
176 struct sctp_stream_queue_pending *sp;
177 struct sctp_association *asoc;
179 SCTP_TCB_LOCK_ASSERT(stcb);
182 * This function returns if any stream has true unsent data on it.
183 * Note that as it looks through it will clean up any places that
184 * have old data that has been sent but left at top of stream queue.
188 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
189 /* Check to see if some data queued */
190 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
191 /* sa_ignore FREED_MEMORY */
192 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
196 if ((sp->msg_is_complete) &&
198 (sp->sender_all_done)) {
200 * We are doing differed cleanup. Last time
201 * through when we took all the data the
202 * sender_all_done was not set.
204 if (sp->put_last_out == 0) {
205 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
206 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
212 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
213 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
214 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp);
216 sctp_free_remote_addr(sp->net);
220 sctp_m_freem(sp->data);
223 sctp_free_a_strmoq(stcb, sp, so_locked);
224 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
230 if (unsent_data > 0) {
235 return (unsent_data);
239 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
241 struct sctp_init *init;
242 struct sctp_association *asoc;
243 struct sctp_nets *lnet;
246 SCTP_TCB_LOCK_ASSERT(stcb);
250 /* save off parameters */
251 asoc->peer_vtag = ntohl(init->initiate_tag);
252 asoc->peers_rwnd = ntohl(init->a_rwnd);
254 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
256 if (!TAILQ_EMPTY(&asoc->nets)) {
257 /* update any ssthresh's that may have a default */
258 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
259 lnet->ssthresh = asoc->peers_rwnd;
260 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
261 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
265 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
267 struct sctp_stream_out *outs;
268 struct sctp_stream_queue_pending *sp, *nsp;
269 struct sctp_tmit_chunk *chk, *nchk;
271 /* abandon the upper streams */
272 newcnt = ntohs(init->num_inbound_streams);
273 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
274 if (chk->rec.data.sid >= newcnt) {
275 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
276 asoc->send_queue_cnt--;
277 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
278 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
281 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
284 if (chk->data != NULL) {
285 sctp_free_bufspace(stcb, asoc, chk, 1);
286 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
287 0, chk, SCTP_SO_NOT_LOCKED);
289 sctp_m_freem(chk->data);
293 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
294 /* sa_ignore FREED_MEMORY */
298 for (i = newcnt; i < asoc->pre_open_streams; i++) {
299 outs = &asoc->strmout[i];
300 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
301 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
302 TAILQ_REMOVE(&outs->outqueue, sp, next);
303 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp);
304 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
305 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
307 sctp_m_freem(sp->data);
311 sctp_free_remote_addr(sp->net);
315 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
316 /* sa_ignore FREED_MEMORY */
318 outs->state = SCTP_STREAM_CLOSED;
321 /* cut back the count */
322 asoc->pre_open_streams = newcnt;
324 asoc->streamoutcnt = asoc->pre_open_streams;
326 for (i = 0; i < asoc->streamoutcnt; i++) {
327 asoc->strmout[i].state = SCTP_STREAM_OPEN;
330 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
331 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
332 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
333 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
335 /* This is the next one we expect */
336 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
338 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
339 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
341 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
342 /* open the requested streams */
344 if (asoc->strmin != NULL) {
345 /* Free the old ones */
346 for (i = 0; i < asoc->streamincnt; i++) {
347 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
348 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
350 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
352 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
353 asoc->streamincnt = ntohs(init->num_outbound_streams);
355 asoc->streamincnt = asoc->max_inbound_streams;
357 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
358 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
359 if (asoc->strmin == NULL) {
360 /* we didn't get memory for the streams! */
361 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
364 for (i = 0; i < asoc->streamincnt; i++) {
365 asoc->strmin[i].sid = i;
366 asoc->strmin[i].last_mid_delivered = 0xffffffff;
367 TAILQ_INIT(&asoc->strmin[i].inqueue);
368 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
369 asoc->strmin[i].pd_api_started = 0;
370 asoc->strmin[i].delivery_started = 0;
373 * load_address_from_init will put the addresses into the
374 * association when the COOKIE is processed or the INIT-ACK is
375 * processed. Both types of COOKIE's existing and new call this
376 * routine. It will remove addresses that are no longer in the
377 * association (for the restarting case where addresses are
378 * removed). Up front when the INIT arrives we will discard it if it
379 * is a restart and new addresses have been added.
381 /* sa_ignore MEMLEAK */
386 * INIT-ACK message processing/consumption returns value < 0 on error
389 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
390 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
391 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
392 struct sctp_nets *net, int *abort_no_unlock,
393 uint8_t mflowtype, uint32_t mflowid,
396 struct sctp_association *asoc;
398 int retval, abort_flag, cookie_found;
400 int nat_friendly = 0;
402 /* First verify that we have no illegal param's */
406 op_err = sctp_arethere_unrecognized_parameters(m,
407 (offset + sizeof(struct sctp_init_chunk)),
408 &abort_flag, (struct sctp_chunkhdr *)cp,
409 &nat_friendly, &cookie_found);
411 /* Send an abort and notify peer */
412 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
413 src, dst, sh, op_err,
416 *abort_no_unlock = 1;
422 /* Only report the missing cookie parameter */
423 if (op_err != NULL) {
424 sctp_m_freem(op_err);
426 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
427 /* We abort with an error of missing mandatory param */
428 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
429 if (op_err != NULL) {
430 struct sctp_error_missing_param *cause;
432 SCTP_BUF_LEN(op_err) = len;
433 cause = mtod(op_err, struct sctp_error_missing_param *);
434 /* Subtract the reserved param */
435 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
436 cause->cause.length = htons(len);
437 cause->num_missing_params = htonl(1);
438 cause->type[0] = htons(SCTP_STATE_COOKIE);
440 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
441 src, dst, sh, op_err,
444 *abort_no_unlock = 1;
448 asoc->peer_supports_nat = (uint8_t)nat_friendly;
449 /* process the peer's parameters in the INIT-ACK */
450 if (sctp_process_init((struct sctp_init_chunk *)cp, stcb) < 0) {
451 if (op_err != NULL) {
452 sctp_m_freem(op_err);
454 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
455 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
456 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
457 src, dst, sh, op_err,
460 *abort_no_unlock = 1;
463 initack_limit = offset + ntohs(cp->ch.chunk_length);
464 /* load all addresses */
465 if ((retval = sctp_load_addresses_from_init(stcb, m,
466 offset + sizeof(struct sctp_init_chunk),
467 initack_limit, src, dst, NULL, stcb->asoc.port)) < 0) {
468 if (op_err != NULL) {
469 sctp_m_freem(op_err);
471 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
472 "Problem with address parameters");
473 SCTPDBG(SCTP_DEBUG_INPUT1,
474 "Load addresses from INIT causes an abort %d\n",
476 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
477 src, dst, sh, op_err,
480 *abort_no_unlock = 1;
483 /* if the peer doesn't support asconf, flush the asconf queue */
484 if (asoc->asconf_supported == 0) {
485 struct sctp_asconf_addr *param, *nparam;
487 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
488 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
489 SCTP_FREE(param, SCTP_M_ASC_ADDR);
493 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
494 stcb->asoc.local_hmacs);
496 sctp_queue_op_err(stcb, op_err);
497 /* queuing will steal away the mbuf chain to the out queue */
500 /* extract the cookie and queue it to "echo" it back... */
501 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
502 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
503 stcb->asoc.overall_error_count,
505 SCTP_FROM_SCTP_INPUT,
510 * Cancel the INIT timer, We do this first before queueing the
511 * cookie. We always cancel at the primary to assume that we are
512 * canceling the timer started by the INIT which always goes to the
515 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
516 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
518 /* calculate the RTO */
519 if (asoc->overall_error_count == 0) {
520 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
521 SCTP_RTT_FROM_NON_DATA);
523 stcb->asoc.overall_error_count = 0;
524 net->error_count = 0;
525 retval = sctp_send_cookie_echo(m, offset, initack_limit, stcb, net);
530 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
531 struct sctp_tcb *stcb, struct sctp_nets *net)
533 union sctp_sockstore store;
534 struct sctp_nets *r_net, *f_net;
537 uint16_t old_error_counter;
539 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
544 memset(&store, 0, sizeof(store));
545 switch (cp->heartbeat.hb_info.addr_family) {
548 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
549 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
550 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
551 store.sin.sin_port = stcb->rport;
552 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
553 sizeof(store.sin.sin_addr));
561 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
562 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
563 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
564 store.sin6.sin6_port = stcb->rport;
565 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
574 r_net = sctp_findnet(stcb, &store.sa);
576 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
579 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
580 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
581 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
583 * If the its a HB and it's random value is correct when can
584 * confirm the destination.
586 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
587 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
588 stcb->asoc.primary_destination = r_net;
589 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
590 f_net = TAILQ_FIRST(&stcb->asoc.nets);
591 if (f_net != r_net) {
593 * first one on the list is NOT the primary
594 * sctp_cmpaddr() is much more efficient if
595 * the primary is the first on the list,
598 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
599 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
603 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
604 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
605 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
606 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
607 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
609 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
610 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
611 stcb->asoc.overall_error_count,
613 SCTP_FROM_SCTP_INPUT,
616 stcb->asoc.overall_error_count = 0;
617 old_error_counter = r_net->error_count;
618 r_net->error_count = 0;
619 r_net->hb_responded = 1;
620 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
621 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
622 /* Now lets do a RTO with this */
623 sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
624 SCTP_RTT_FROM_NON_DATA);
625 if ((r_net->dest_state & SCTP_ADDR_REACHABLE) == 0) {
626 r_net->dest_state |= SCTP_ADDR_REACHABLE;
627 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
628 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
630 if (r_net->dest_state & SCTP_ADDR_PF) {
631 r_net->dest_state &= ~SCTP_ADDR_PF;
632 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
634 if (old_error_counter > 0) {
635 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
636 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
637 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
639 if (r_net == stcb->asoc.primary_destination) {
640 if (stcb->asoc.alternate) {
641 /* release the alternate, primary is good */
642 sctp_free_remote_addr(stcb->asoc.alternate);
643 stcb->asoc.alternate = NULL;
646 /* Mobility adaptation */
648 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
649 SCTP_MOBILITY_BASE) ||
650 sctp_is_mobility_feature_on(stcb->sctp_ep,
651 SCTP_MOBILITY_FASTHANDOFF)) &&
652 sctp_is_mobility_feature_on(stcb->sctp_ep,
653 SCTP_MOBILITY_PRIM_DELETED)) {
654 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
655 stcb->sctp_ep, stcb, NULL,
656 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
657 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
658 SCTP_MOBILITY_FASTHANDOFF)) {
659 sctp_assoc_immediate_retrans(stcb,
660 stcb->asoc.primary_destination);
662 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
663 SCTP_MOBILITY_BASE)) {
664 sctp_move_chunks_from_net(stcb,
665 stcb->asoc.deleted_primary);
667 sctp_delete_prim_timer(stcb->sctp_ep, stcb);
673 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
676 * Return 0 means we want you to proceed with the abort non-zero
677 * means no abort processing.
680 struct sctpasochead *head;
682 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
683 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
684 atomic_add_int(&stcb->asoc.refcnt, 1);
685 SCTP_TCB_UNLOCK(stcb);
686 SCTP_INP_INFO_WLOCK();
688 atomic_subtract_int(&stcb->asoc.refcnt, 1);
692 new_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
693 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
694 /* generate a new vtag and send init */
695 LIST_REMOVE(stcb, sctp_asocs);
696 stcb->asoc.my_vtag = new_vtag;
697 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
699 * put it in the bucket in the vtag hash of assoc's for the
702 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
703 SCTP_INP_INFO_WUNLOCK();
704 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
708 * treat like a case where the cookie expired i.e.: - dump
709 * current cookie. - generate a new vtag. - resend init.
711 /* generate a new vtag and send init */
712 LIST_REMOVE(stcb, sctp_asocs);
713 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
714 sctp_stop_all_cookie_timers(stcb);
715 sctp_toss_old_cookies(stcb, &stcb->asoc);
716 stcb->asoc.my_vtag = new_vtag;
717 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
719 * put it in the bucket in the vtag hash of assoc's for the
722 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
723 SCTP_INP_INFO_WUNLOCK();
724 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
731 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
732 struct sctp_nets *net)
735 * return 0 means we want you to proceed with the abort non-zero
736 * means no abort processing
738 if (stcb->asoc.auth_supported == 0) {
739 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
742 sctp_asconf_send_nat_state_update(stcb, net);
746 /* Returns 1 if the stcb was aborted, 0 otherwise */
748 sctp_handle_abort(struct sctp_abort_chunk *abort,
749 struct sctp_tcb *stcb, struct sctp_nets *net)
754 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
758 len = ntohs(abort->ch.chunk_length);
759 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
761 * Need to check the cause codes for our two magic nat
762 * aborts which don't kill the assoc necessarily.
764 struct sctp_error_cause *cause;
766 cause = (struct sctp_error_cause *)(abort + 1);
767 error = ntohs(cause->code);
768 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
769 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ABORT flags:%x\n",
770 abort->ch.chunk_flags);
771 if (sctp_handle_nat_colliding_state(stcb)) {
774 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
775 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ABORT flags:%x\n",
776 abort->ch.chunk_flags);
777 if (sctp_handle_nat_missing_state(stcb, net)) {
784 /* stop any receive timers */
785 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
786 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
787 /* notify user of the abort and clean up... */
788 sctp_abort_notification(stcb, true, false, error, abort, SCTP_SO_NOT_LOCKED);
790 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
791 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
792 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
793 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
795 #ifdef SCTP_ASOCLOG_OF_TSNS
796 sctp_print_out_track_log(stcb);
798 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
799 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
800 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
805 sctp_start_net_timers(struct sctp_tcb *stcb)
807 uint32_t cnt_hb_sent;
808 struct sctp_nets *net;
811 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
813 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
814 * If the dest in unconfirmed send a hb as well if under
815 * max_hb_burst have been sent.
817 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
818 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
819 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
820 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
821 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
826 sctp_chunk_output(stcb->sctp_ep, stcb,
827 SCTP_OUTPUT_FROM_COOKIE_ACK,
833 sctp_check_data_from_peer(struct sctp_tcb *stcb, int *abort_flag)
835 char msg[SCTP_DIAG_INFO_LEN];
836 struct sctp_association *asoc;
842 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn) ||
843 SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
844 SCTP_SNPRINTF(msg, sizeof(msg), "Missing TSN");
848 for (i = 0; i < asoc->streamincnt; i++) {
849 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue) ||
850 !TAILQ_EMPTY(&asoc->strmin[i].uno_inqueue)) {
851 SCTP_SNPRINTF(msg, sizeof(msg), "Missing user data");
858 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
859 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_INPUT + SCTP_LOC_9;
860 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
865 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
866 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
868 int some_on_streamwheel;
871 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_shutdown: handling SHUTDOWN\n");
874 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
875 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
878 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
879 /* Shutdown NOT the expected size */
882 old_state = SCTP_GET_STATE(stcb);
883 sctp_update_acked(stcb, cp, abort_flag);
887 sctp_check_data_from_peer(stcb, abort_flag);
891 if (stcb->sctp_socket) {
892 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
893 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
894 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
895 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
897 * notify upper layer that peer has initiated a
900 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
903 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
906 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
908 * stop the shutdown timer, since we WILL move to
911 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
912 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
914 /* Now is there unsent data on a stream somewhere? */
915 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
917 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
918 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
919 some_on_streamwheel) {
920 /* By returning we will push more data out */
923 /* no outstanding data to send, so move on... */
924 /* send SHUTDOWN-ACK */
925 /* move to SHUTDOWN-ACK-SENT state */
926 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
927 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
928 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
930 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
931 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
932 sctp_stop_timers_for_shutdown(stcb);
933 sctp_send_shutdown_ack(stcb, net);
934 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
935 stcb->sctp_ep, stcb, net);
936 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
937 sctp_send_shutdown_ack(stcb, net);
943 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
944 struct sctp_tcb *stcb,
945 struct sctp_nets *net)
949 SCTPDBG(SCTP_DEBUG_INPUT2,
950 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
955 /* process according to association state */
956 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
957 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
958 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
959 sctp_send_shutdown_complete(stcb, net, 1);
960 SCTP_TCB_UNLOCK(stcb);
963 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
964 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
965 /* unexpected SHUTDOWN-ACK... so ignore... */
966 SCTP_TCB_UNLOCK(stcb);
969 sctp_check_data_from_peer(stcb, &abort_flag);
974 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
975 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
976 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
977 panic("Queues are not empty when handling SHUTDOWN-ACK");
981 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
982 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
983 /* send SHUTDOWN-COMPLETE */
984 sctp_send_shutdown_complete(stcb, net, 0);
985 /* notify upper layer protocol */
986 if (stcb->sctp_socket) {
987 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
988 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
989 SCTP_SB_CLEAR(stcb->sctp_socket->so_snd);
991 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
993 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
994 /* free the TCB but first save off the ep */
995 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
996 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1000 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type)
1002 switch (chunk_type) {
1003 case SCTP_ASCONF_ACK:
1005 sctp_asconf_cleanup(stcb);
1007 case SCTP_IFORWARD_CUM_TSN:
1008 case SCTP_FORWARD_CUM_TSN:
1009 stcb->asoc.prsctp_supported = 0;
1012 SCTPDBG(SCTP_DEBUG_INPUT2,
1013 "Peer does not support chunk type %d (0x%x).\n",
1014 chunk_type, chunk_type);
1020 * Skip past the param header and then we will find the param that caused the
1021 * problem. There are a number of param's in a ASCONF OR the prsctp param
1022 * these will turn of specific features.
1023 * XXX: Is this the right thing to do?
1026 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1028 switch (parameter_type) {
1030 case SCTP_PRSCTP_SUPPORTED:
1031 stcb->asoc.prsctp_supported = 0;
1033 case SCTP_SUPPORTED_CHUNK_EXT:
1035 /* draft-ietf-tsvwg-addip-sctp */
1036 case SCTP_HAS_NAT_SUPPORT:
1037 stcb->asoc.peer_supports_nat = 0;
1039 case SCTP_ADD_IP_ADDRESS:
1040 case SCTP_DEL_IP_ADDRESS:
1041 case SCTP_SET_PRIM_ADDR:
1042 stcb->asoc.asconf_supported = 0;
1044 case SCTP_SUCCESS_REPORT:
1045 case SCTP_ERROR_CAUSE_IND:
1046 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1047 SCTPDBG(SCTP_DEBUG_INPUT2,
1048 "Turning off ASCONF to this strange peer\n");
1049 stcb->asoc.asconf_supported = 0;
1052 SCTPDBG(SCTP_DEBUG_INPUT2,
1053 "Peer does not support param type %d (0x%x)??\n",
1054 parameter_type, parameter_type);
1060 sctp_handle_error(struct sctp_chunkhdr *ch,
1061 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1063 struct sctp_error_cause *cause;
1064 struct sctp_association *asoc;
1065 uint32_t remaining_length, adjust;
1066 uint16_t code, cause_code, cause_length;
1068 /* parse through all of the errors and process */
1070 cause = (struct sctp_error_cause *)((caddr_t)ch +
1071 sizeof(struct sctp_chunkhdr));
1072 remaining_length = ntohs(ch->chunk_length);
1073 if (remaining_length > limit) {
1074 remaining_length = limit;
1076 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1077 remaining_length -= sizeof(struct sctp_chunkhdr);
1079 remaining_length = 0;
1082 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1083 /* Process an Error Cause */
1084 cause_code = ntohs(cause->code);
1085 cause_length = ntohs(cause->length);
1086 if ((cause_length > remaining_length) || (cause_length == 0)) {
1087 /* Invalid cause length, possibly due to truncation. */
1088 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1089 remaining_length, cause_length);
1093 /* report the first error cause */
1096 switch (cause_code) {
1097 case SCTP_CAUSE_INVALID_STREAM:
1098 case SCTP_CAUSE_MISSING_PARAM:
1099 case SCTP_CAUSE_INVALID_PARAM:
1100 case SCTP_CAUSE_NO_USER_DATA:
1101 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1104 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1105 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ERROR flags: %x\n",
1107 if (sctp_handle_nat_colliding_state(stcb)) {
1111 case SCTP_CAUSE_NAT_MISSING_STATE:
1112 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ERROR flags: %x\n",
1114 if (sctp_handle_nat_missing_state(stcb, net)) {
1118 case SCTP_CAUSE_STALE_COOKIE:
1120 * We only act if we have echoed a cookie and are
1123 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1124 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1126 struct sctp_error_stale_cookie *stale_cookie;
1127 uint64_t stale_time;
1129 asoc->stale_cookie_count++;
1130 if (asoc->stale_cookie_count > asoc->max_init_times) {
1131 sctp_abort_notification(stcb, false, true, 0, NULL, SCTP_SO_NOT_LOCKED);
1132 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1133 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1136 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1137 stale_time = ntohl(stale_cookie->stale_time);
1138 if (stale_time == 0) {
1139 /* Use an RTT as an approximation. */
1140 (void)SCTP_GETTIME_TIMEVAL(&now);
1141 timevalsub(&now, &asoc->time_entered);
1142 stale_time = (uint64_t)1000000 * (uint64_t)now.tv_sec + (uint64_t)now.tv_usec;
1143 if (stale_time == 0) {
1148 * stale_time is in usec, convert it to
1149 * msec. Round upwards, to ensure that it is
1152 stale_time = (stale_time + 999) / 1000;
1153 /* Double it, to be more robust on RTX. */
1154 stale_time = 2 * stale_time;
1155 asoc->cookie_preserve_req = (uint32_t)stale_time;
1156 if (asoc->overall_error_count == 0) {
1157 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
1158 SCTP_RTT_FROM_NON_DATA);
1160 asoc->overall_error_count = 0;
1161 /* Blast back to INIT state */
1162 sctp_toss_old_cookies(stcb, &stcb->asoc);
1163 sctp_stop_all_cookie_timers(stcb);
1164 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1165 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
1166 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1169 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1171 * Nothing we can do here, we don't do hostname
1172 * addresses so if the peer does not like my IPv6
1173 * (or IPv4 for that matter) it does not matter. If
1174 * they don't support that type of address, they can
1175 * NOT possibly get that packet type... i.e. with no
1176 * IPv6 you can't receive a IPv6 packet. so we can
1177 * safely ignore this one. If we ever added support
1178 * for HOSTNAME Addresses, then we would need to do
1182 case SCTP_CAUSE_UNRECOG_CHUNK:
1183 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1184 struct sctp_error_unrecognized_chunk *unrec_chunk;
1186 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1187 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type);
1190 case SCTP_CAUSE_UNRECOG_PARAM:
1191 /* XXX: We only consider the first parameter */
1192 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1193 struct sctp_paramhdr *unrec_parameter;
1195 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1196 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1199 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1201 * We ignore this since the timer will drive out a
1202 * new cookie anyway and there timer will drive us
1203 * to send a SHUTDOWN_COMPLETE. We can't send one
1204 * here since we don't have their tag.
1207 case SCTP_CAUSE_DELETING_LAST_ADDR:
1208 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1209 case SCTP_CAUSE_DELETING_SRC_ADDR:
1211 * We should NOT get these here, but in a
1214 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1217 case SCTP_CAUSE_OUT_OF_RESC:
1219 * And what, pray tell do we do with the fact that
1220 * the peer is out of resources? Not really sure we
1221 * could do anything but abort. I suspect this
1222 * should have came WITH an abort instead of in a
1227 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1231 adjust = SCTP_SIZE32(cause_length);
1232 if (remaining_length >= adjust) {
1233 remaining_length -= adjust;
1235 remaining_length = 0;
1237 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1239 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1244 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1245 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1246 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1247 struct sctp_nets *net, int *abort_no_unlock,
1248 uint8_t mflowtype, uint32_t mflowid,
1251 struct sctp_init_ack *init_ack;
1252 struct mbuf *op_err;
1254 SCTPDBG(SCTP_DEBUG_INPUT2,
1255 "sctp_handle_init_ack: handling INIT-ACK\n");
1258 SCTPDBG(SCTP_DEBUG_INPUT2,
1259 "sctp_handle_init_ack: TCB is null\n");
1262 /* Only process the INIT-ACK chunk in COOKIE WAIT state. */
1263 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
1264 init_ack = &cp->init;
1265 /* Validate parameters. */
1266 if ((ntohl(init_ack->initiate_tag) == 0) ||
1267 (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) ||
1268 (ntohs(init_ack->num_inbound_streams) == 0) ||
1269 (ntohs(init_ack->num_outbound_streams) == 0)) {
1270 /* One of the mandatory parameters is illegal. */
1271 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1272 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1273 src, dst, sh, op_err,
1276 *abort_no_unlock = 1;
1279 if (stcb->asoc.primary_destination->dest_state &
1280 SCTP_ADDR_UNCONFIRMED) {
1282 * The primary is where we sent the INIT, we can
1283 * always consider it confirmed when the INIT-ACK is
1284 * returned. Do this before we load addresses
1287 stcb->asoc.primary_destination->dest_state &=
1288 ~SCTP_ADDR_UNCONFIRMED;
1289 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1290 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1292 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1293 net, abort_no_unlock,
1296 /* error in parsing parameters */
1299 /* Update our state. */
1300 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1301 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1303 /* Reset the RTO calculation. */
1304 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1305 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1306 stcb->asoc.overall_error_count,
1308 SCTP_FROM_SCTP_INPUT,
1311 stcb->asoc.overall_error_count = 0;
1312 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1314 * Collapse the init timer back in case of a exponential
1317 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1320 * The output routine at the end of the inbound data
1321 * processing will cause the cookie to be sent.
1323 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1330 static struct sctp_tcb *
1331 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1332 struct sockaddr *src, struct sockaddr *dst,
1333 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1334 struct sctp_inpcb *inp, struct sctp_nets **netp,
1335 struct sockaddr *init_src, int *notification,
1336 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1337 uint8_t mflowtype, uint32_t mflowid,
1338 uint32_t vrf_id, uint16_t port);
1341 * handle a state cookie for an existing association m: input packet mbuf
1342 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1343 * "split" mbuf and the cookie signature does not exist offset: offset into
1344 * mbuf to the cookie-echo chunk
1346 static struct sctp_tcb *
1347 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1348 struct sockaddr *src, struct sockaddr *dst,
1349 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1350 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1351 struct sockaddr *init_src, int *notification,
1352 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1353 uint8_t mflowtype, uint32_t mflowid,
1354 uint32_t vrf_id, uint16_t port)
1356 struct sctp_association *asoc;
1357 struct sctp_init_chunk *init_cp, init_buf;
1358 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1359 struct sctp_asconf_addr *aparam, *naparam;
1360 struct sctp_asconf_ack *aack, *naack;
1361 struct sctp_tmit_chunk *chk, *nchk;
1362 struct sctp_stream_reset_list *strrst, *nstrrst;
1363 struct sctp_queued_to_read *sq, *nsq;
1364 struct sctp_nets *net;
1365 struct mbuf *op_err;
1366 int init_offset, initack_offset, i;
1370 #if defined(SCTP_DETAILED_STR_STATS)
1375 /* I know that the TCB is non-NULL from the caller */
1377 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1378 if (asoc->cookie_how[how_indx] == 0)
1381 if (how_indx < sizeof(asoc->cookie_how)) {
1382 asoc->cookie_how[how_indx] = 1;
1384 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1385 /* SHUTDOWN came in after sending INIT-ACK */
1386 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1387 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1388 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1389 mflowtype, mflowid, inp->fibnum,
1391 if (how_indx < sizeof(asoc->cookie_how))
1392 asoc->cookie_how[how_indx] = 2;
1393 SCTP_TCB_UNLOCK(stcb);
1397 * find and validate the INIT chunk in the cookie (peer's info) the
1398 * INIT should start after the cookie-echo header struct (chunk
1399 * header, state cookie header struct)
1401 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1403 init_cp = (struct sctp_init_chunk *)
1404 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1405 (uint8_t *)&init_buf);
1406 if (init_cp == NULL) {
1407 /* could not pull a INIT chunk in cookie */
1408 SCTP_TCB_UNLOCK(stcb);
1411 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1412 SCTP_TCB_UNLOCK(stcb);
1416 * find and validate the INIT-ACK chunk in the cookie (my info) the
1417 * INIT-ACK follows the INIT chunk
1419 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1420 initack_cp = (struct sctp_init_ack_chunk *)
1421 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1422 (uint8_t *)&initack_buf);
1423 if (initack_cp == NULL) {
1424 /* could not pull INIT-ACK chunk in cookie */
1425 SCTP_TCB_UNLOCK(stcb);
1428 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1429 SCTP_TCB_UNLOCK(stcb);
1432 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1433 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1435 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1436 * to get into the OPEN state
1438 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1440 * Opps, this means that we somehow generated two vtag's
1441 * the same. I.e. we did:
1443 * <---INIT(tag=a)------
1444 * ----INIT-ACK(tag=t)-->
1445 * ----INIT(tag=t)------> *1
1446 * <---INIT-ACK(tag=a)---
1447 * <----CE(tag=t)------------- *2
1449 * At point *1 we should be generating a different
1450 * tag t'. Which means we would throw away the CE and send
1451 * ours instead. Basically this is case C (throw away side).
1453 if (how_indx < sizeof(asoc->cookie_how))
1454 asoc->cookie_how[how_indx] = 17;
1455 SCTP_TCB_UNLOCK(stcb);
1458 switch (SCTP_GET_STATE(stcb)) {
1459 case SCTP_STATE_COOKIE_WAIT:
1460 case SCTP_STATE_COOKIE_ECHOED:
1462 * INIT was sent but got a COOKIE_ECHO with the
1463 * correct tags... just accept it...but we must
1464 * process the init so that we can make sure we have
1465 * the right seq no's.
1467 /* First we must process the INIT !! */
1468 if (sctp_process_init(init_cp, stcb) < 0) {
1469 if (how_indx < sizeof(asoc->cookie_how))
1470 asoc->cookie_how[how_indx] = 3;
1471 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1472 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1473 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1474 src, dst, sh, op_err,
1479 /* we have already processed the INIT so no problem */
1480 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1482 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1483 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1485 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1486 /* update current state */
1487 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1488 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1490 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1492 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1493 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1494 sctp_stop_all_cookie_timers(stcb);
1495 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1496 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1497 (!SCTP_IS_LISTENING(inp))) {
1499 * Here is where collision would go if we
1500 * did a connect() and instead got a
1501 * init/init-ack/cookie done before the
1502 * init-ack came back..
1504 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
1505 soisconnected(stcb->sctp_socket);
1507 /* notify upper layer */
1508 *notification = SCTP_NOTIFY_ASSOC_UP;
1509 net->hb_responded = 1;
1510 if (stcb->asoc.sctp_autoclose_ticks &&
1511 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1512 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1518 * we're in the OPEN state (or beyond), so peer must
1519 * have simply lost the COOKIE-ACK
1523 sctp_stop_all_cookie_timers(stcb);
1524 if ((retval = sctp_load_addresses_from_init(stcb, m,
1525 init_offset + sizeof(struct sctp_init_chunk),
1526 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1527 if (how_indx < sizeof(asoc->cookie_how))
1528 asoc->cookie_how[how_indx] = 4;
1529 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1530 "Problem with address parameters");
1531 SCTPDBG(SCTP_DEBUG_INPUT1,
1532 "Load addresses from INIT causes an abort %d\n",
1534 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1535 src, dst, sh, op_err,
1540 /* respond with a COOKIE-ACK */
1541 sctp_toss_old_cookies(stcb, asoc);
1542 sctp_send_cookie_ack(stcb);
1543 if (how_indx < sizeof(asoc->cookie_how))
1544 asoc->cookie_how[how_indx] = 5;
1548 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1549 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1550 cookie->tie_tag_my_vtag == 0 &&
1551 cookie->tie_tag_peer_vtag == 0) {
1553 * case C in Section 5.2.4 Table 2: XMOO silently discard
1555 if (how_indx < sizeof(asoc->cookie_how))
1556 asoc->cookie_how[how_indx] = 6;
1557 SCTP_TCB_UNLOCK(stcb);
1561 * If nat support, and the below and stcb is established, send back
1562 * a ABORT(colliding state) if we are established.
1564 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1565 (asoc->peer_supports_nat) &&
1566 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1567 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1568 (asoc->peer_vtag == 0)))) {
1570 * Special case - Peer's support nat. We may have two init's
1571 * that we gave out the same tag on since one was not
1572 * established.. i.e. we get INIT from host-1 behind the nat
1573 * and we respond tag-a, we get a INIT from host-2 behind
1574 * the nat and we get tag-a again. Then we bring up host-1
1575 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1576 * Now we have colliding state. We must send an abort here
1577 * with colliding state indication.
1579 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1580 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1581 mflowtype, mflowid, inp->fibnum,
1583 SCTP_TCB_UNLOCK(stcb);
1586 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1587 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1588 (asoc->peer_vtag == 0))) {
1590 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1591 * should be ok, re-accept peer info
1593 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1595 * Extension of case C. If we hit this, then the
1596 * random number generator returned the same vtag
1597 * when we first sent our INIT-ACK and when we later
1598 * sent our INIT. The side with the seq numbers that
1599 * are different will be the one that normally would
1600 * have hit case C. This in effect "extends" our
1601 * vtags in this collision case to be 64 bits. The
1602 * same collision could occur aka you get both vtag
1603 * and seq number the same twice in a row.. but is
1604 * much less likely. If it did happen then we would
1605 * proceed through and bring up the assoc.. we may
1606 * end up with the wrong stream setup however..
1607 * which would be bad.. but there is no way to
1608 * tell.. until we send on a stream that does not
1611 if (how_indx < sizeof(asoc->cookie_how))
1612 asoc->cookie_how[how_indx] = 7;
1614 SCTP_TCB_UNLOCK(stcb);
1617 if (how_indx < sizeof(asoc->cookie_how))
1618 asoc->cookie_how[how_indx] = 8;
1619 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1620 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1621 sctp_stop_all_cookie_timers(stcb);
1623 * since we did not send a HB make sure we don't double
1626 net->hb_responded = 1;
1627 if (stcb->asoc.sctp_autoclose_ticks &&
1628 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1629 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1632 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1633 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1634 asoc->pre_open_streams = asoc->streamoutcnt;
1637 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1639 * Ok the peer probably discarded our data (if we
1640 * echoed a cookie+data). So anything on the
1641 * sent_queue should be marked for retransmit, we
1642 * may not get something to kick us so it COULD
1643 * still take a timeout to move these.. but it can't
1644 * hurt to mark them.
1647 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1648 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1649 chk->sent = SCTP_DATAGRAM_RESEND;
1650 sctp_flight_size_decrease(chk);
1651 sctp_total_flight_decrease(stcb, chk);
1652 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1657 /* process the INIT info (peer's info) */
1658 if (sctp_process_init(init_cp, stcb) < 0) {
1659 if (how_indx < sizeof(asoc->cookie_how))
1660 asoc->cookie_how[how_indx] = 9;
1661 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1662 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1663 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1664 src, dst, sh, op_err,
1669 if ((retval = sctp_load_addresses_from_init(stcb, m,
1670 init_offset + sizeof(struct sctp_init_chunk),
1671 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1672 if (how_indx < sizeof(asoc->cookie_how))
1673 asoc->cookie_how[how_indx] = 10;
1674 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1675 "Problem with address parameters");
1676 SCTPDBG(SCTP_DEBUG_INPUT1,
1677 "Load addresses from INIT causes an abort %d\n",
1679 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1680 src, dst, sh, op_err,
1685 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1686 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1687 *notification = SCTP_NOTIFY_ASSOC_UP;
1689 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1690 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1691 (!SCTP_IS_LISTENING(inp))) {
1692 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
1693 soisconnected(stcb->sctp_socket);
1695 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1696 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1698 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1699 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1700 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1701 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1703 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1705 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1706 sctp_stop_all_cookie_timers(stcb);
1707 sctp_toss_old_cookies(stcb, asoc);
1708 sctp_send_cookie_ack(stcb);
1711 * only if we have retrans set do we do this. What
1712 * this call does is get only the COOKIE-ACK out and
1713 * then when we return the normal call to
1714 * sctp_chunk_output will get the retrans out behind
1717 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1719 if (how_indx < sizeof(asoc->cookie_how))
1720 asoc->cookie_how[how_indx] = 11;
1724 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1725 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1726 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1727 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1728 cookie->tie_tag_peer_vtag != 0) {
1729 struct sctpasochead *head;
1731 if (asoc->peer_supports_nat) {
1732 struct sctp_tcb *local_stcb;
1735 * This is a gross gross hack. Just call the
1736 * cookie_new code since we are allowing a duplicate
1737 * association. I hope this works...
1739 local_stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst,
1740 sh, cookie, cookie_len,
1741 inp, netp, init_src, notification,
1742 auth_skipped, auth_offset, auth_len,
1745 if (local_stcb == NULL) {
1746 SCTP_TCB_UNLOCK(stcb);
1748 return (local_stcb);
1751 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1754 if (how_indx < sizeof(asoc->cookie_how))
1755 asoc->cookie_how[how_indx] = 12;
1756 sctp_stop_association_timers(stcb, false);
1757 /* notify upper layer */
1758 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1759 atomic_add_int(&stcb->asoc.refcnt, 1);
1760 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1761 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1762 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1763 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1765 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1766 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1767 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1768 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1770 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1771 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1773 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1774 /* move to OPEN state, if not in SHUTDOWN_SENT */
1775 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1777 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1778 asoc->pre_open_streams = asoc->streamoutcnt;
1780 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1781 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1782 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1783 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1784 asoc->str_reset_seq_in = asoc->init_seq_number;
1785 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1786 asoc->send_sack = 1;
1787 asoc->data_pkts_seen = 0;
1788 asoc->last_data_chunk_from = NULL;
1789 asoc->last_control_chunk_from = NULL;
1790 asoc->last_net_cmt_send_started = NULL;
1791 if (asoc->mapping_array) {
1792 memset(asoc->mapping_array, 0,
1793 asoc->mapping_array_size);
1795 if (asoc->nr_mapping_array) {
1796 memset(asoc->nr_mapping_array, 0,
1797 asoc->mapping_array_size);
1799 SCTP_TCB_UNLOCK(stcb);
1800 SCTP_INP_INFO_WLOCK();
1801 SCTP_INP_WLOCK(stcb->sctp_ep);
1802 SCTP_TCB_LOCK(stcb);
1803 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1804 /* send up all the data */
1805 sctp_report_all_outbound(stcb, 0, SCTP_SO_LOCKED);
1806 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1807 stcb->asoc.strmout[i].chunks_on_queues = 0;
1808 #if defined(SCTP_DETAILED_STR_STATS)
1809 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1810 asoc->strmout[i].abandoned_sent[j] = 0;
1811 asoc->strmout[i].abandoned_unsent[j] = 0;
1814 asoc->strmout[i].abandoned_sent[0] = 0;
1815 asoc->strmout[i].abandoned_unsent[0] = 0;
1817 stcb->asoc.strmout[i].next_mid_ordered = 0;
1818 stcb->asoc.strmout[i].next_mid_unordered = 0;
1819 stcb->asoc.strmout[i].sid = i;
1820 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1822 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
1823 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
1824 SCTP_FREE(strrst, SCTP_M_STRESET);
1826 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
1827 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
1829 sctp_m_freem(sq->data);
1832 sctp_free_remote_addr(sq->whoFrom);
1835 sctp_free_a_readq(stcb, sq);
1837 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
1838 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
1840 sctp_m_freem(chk->data);
1843 if (chk->holds_key_ref)
1844 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1845 sctp_free_remote_addr(chk->whoTo);
1846 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1847 SCTP_DECR_CHK_COUNT();
1849 asoc->ctrl_queue_cnt = 0;
1850 asoc->str_reset = NULL;
1851 asoc->stream_reset_outstanding = 0;
1852 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
1853 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
1855 sctp_m_freem(chk->data);
1858 if (chk->holds_key_ref)
1859 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1860 sctp_free_remote_addr(chk->whoTo);
1861 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1862 SCTP_DECR_CHK_COUNT();
1864 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
1865 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
1866 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1868 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
1869 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
1870 if (aack->data != NULL) {
1871 sctp_m_freem(aack->data);
1873 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
1875 asoc->rcv_edmid = cookie->rcv_edmid;
1877 /* process the INIT-ACK info (my info) */
1878 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1879 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1881 /* pull from vtag hash */
1882 LIST_REMOVE(stcb, sctp_asocs);
1883 /* re-insert to new vtag position */
1884 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1885 SCTP_BASE_INFO(hashasocmark))];
1887 * put it in the bucket in the vtag hash of assoc's for the
1890 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1892 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1893 SCTP_INP_INFO_WUNLOCK();
1894 asoc->total_flight = 0;
1895 asoc->total_flight_count = 0;
1896 /* process the INIT info (peer's info) */
1897 if (sctp_process_init(init_cp, stcb) < 0) {
1898 if (how_indx < sizeof(asoc->cookie_how))
1899 asoc->cookie_how[how_indx] = 13;
1900 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1901 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1902 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1903 src, dst, sh, op_err,
1909 * since we did not send a HB make sure we don't double
1912 net->hb_responded = 1;
1914 if ((retval = sctp_load_addresses_from_init(stcb, m,
1915 init_offset + sizeof(struct sctp_init_chunk),
1916 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1917 if (how_indx < sizeof(asoc->cookie_how))
1918 asoc->cookie_how[how_indx] = 14;
1919 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1920 "Problem with address parameters");
1921 SCTPDBG(SCTP_DEBUG_INPUT1,
1922 "Load addresses from INIT causes an abort %d\n",
1924 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1925 src, dst, sh, op_err,
1930 /* respond with a COOKIE-ACK */
1931 sctp_send_cookie_ack(stcb);
1932 if (how_indx < sizeof(asoc->cookie_how))
1933 asoc->cookie_how[how_indx] = 15;
1934 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE) &&
1935 (asoc->sctp_autoclose_ticks > 0)) {
1936 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
1940 if (how_indx < sizeof(asoc->cookie_how))
1941 asoc->cookie_how[how_indx] = 16;
1942 /* all other cases... */
1943 SCTP_TCB_UNLOCK(stcb);
1948 * handle a state cookie for a new association m: input packet mbuf chain--
1949 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
1950 * and the cookie signature does not exist offset: offset into mbuf to the
1951 * cookie-echo chunk length: length of the cookie chunk to: where the init
1952 * was from returns a new TCB
1954 static struct sctp_tcb *
1955 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1956 struct sockaddr *src, struct sockaddr *dst,
1957 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1958 struct sctp_inpcb *inp, struct sctp_nets **netp,
1959 struct sockaddr *init_src, int *notification,
1960 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1961 uint8_t mflowtype, uint32_t mflowid,
1962 uint32_t vrf_id, uint16_t port)
1964 struct sctp_tcb *stcb;
1965 struct sctp_init_chunk *init_cp, init_buf;
1966 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1967 union sctp_sockstore store;
1968 struct sctp_association *asoc;
1969 int init_offset, initack_offset, initack_limit;
1971 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
1974 * find and validate the INIT chunk in the cookie (peer's info) the
1975 * INIT should start after the cookie-echo header struct (chunk
1976 * header, state cookie header struct)
1978 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
1979 init_cp = (struct sctp_init_chunk *)
1980 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1981 (uint8_t *)&init_buf);
1982 if (init_cp == NULL) {
1983 /* could not pull a INIT chunk in cookie */
1984 SCTPDBG(SCTP_DEBUG_INPUT1,
1985 "process_cookie_new: could not pull INIT chunk hdr\n");
1988 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1989 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
1992 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1994 * find and validate the INIT-ACK chunk in the cookie (my info) the
1995 * INIT-ACK follows the INIT chunk
1997 initack_cp = (struct sctp_init_ack_chunk *)
1998 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1999 (uint8_t *)&initack_buf);
2000 if (initack_cp == NULL) {
2001 /* could not pull INIT-ACK chunk in cookie */
2002 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2005 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2009 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2010 * "initack_limit" value. This is because the chk_length field
2011 * includes the length of the cookie, but the cookie is omitted when
2012 * the INIT and INIT_ACK are tacked onto the cookie...
2014 initack_limit = offset + cookie_len;
2017 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2022 * Here we do a trick, we set in NULL for the proc/thread argument.
2023 * We do this since in effect we only use the p argument when the
2024 * socket is unbound and we must do an implicit bind. Since we are
2025 * getting a cookie, we cannot be unbound.
2027 stcb = sctp_aloc_assoc(inp, init_src, &error,
2028 ntohl(initack_cp->init.initiate_tag),
2029 ntohl(initack_cp->init.initial_tsn), vrf_id,
2030 ntohs(initack_cp->init.num_outbound_streams),
2032 (struct thread *)NULL,
2033 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2035 struct mbuf *op_err;
2037 /* memory problem? */
2038 SCTPDBG(SCTP_DEBUG_INPUT1,
2039 "process_cookie_new: no room for another TCB!\n");
2040 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2041 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2042 src, dst, sh, op_err,
2048 /* get scope variables out of cookie */
2049 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2050 asoc->scope.site_scope = cookie->site_scope;
2051 asoc->scope.local_scope = cookie->local_scope;
2052 asoc->scope.loopback_scope = cookie->loopback_scope;
2054 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2055 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2056 struct mbuf *op_err;
2059 * Houston we have a problem. The EP changed while the
2060 * cookie was in flight. Only recourse is to abort the
2063 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2064 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2065 src, dst, sh, op_err,
2068 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2069 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2072 asoc->rcv_edmid = cookie->rcv_edmid;
2073 /* process the INIT-ACK info (my info) */
2074 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2076 /* process the INIT info (peer's info) */
2077 if (sctp_process_init(init_cp, stcb) < 0) {
2078 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2079 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2082 /* load all addresses */
2083 if (sctp_load_addresses_from_init(stcb, m,
2084 init_offset + sizeof(struct sctp_init_chunk),
2085 initack_offset, src, dst, init_src, port) < 0) {
2086 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2087 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2091 * verify any preceding AUTH chunk that was skipped
2093 /* pull the local authentication parameters from the cookie/init-ack */
2094 sctp_auth_get_cookie_params(stcb, m,
2095 initack_offset + sizeof(struct sctp_init_ack_chunk),
2096 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2098 struct sctp_auth_chunk *auth;
2100 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2101 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2105 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2106 /* auth HMAC failed, dump the assoc and packet */
2107 SCTPDBG(SCTP_DEBUG_AUTH1,
2108 "COOKIE-ECHO: AUTH failed\n");
2109 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2110 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2113 /* remaining chunks checked... good to go */
2114 stcb->asoc.authenticated = 1;
2119 * if we're doing ASCONFs, check to see if we have any new local
2120 * addresses that need to get added to the peer (eg. addresses
2121 * changed while cookie echo in flight). This needs to be done
2122 * after we go to the OPEN state to do the correct asconf
2123 * processing. else, make sure we have the correct addresses in our
2127 /* warning, we re-use sin, sin6, sa_store here! */
2128 /* pull in local_address (our "from" address) */
2129 switch (cookie->laddr_type) {
2131 case SCTP_IPV4_ADDRESS:
2132 /* source addr is IPv4 */
2133 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2134 store.sin.sin_family = AF_INET;
2135 store.sin.sin_len = sizeof(struct sockaddr_in);
2136 store.sin.sin_addr.s_addr = cookie->laddress[0];
2140 case SCTP_IPV6_ADDRESS:
2141 /* source addr is IPv6 */
2142 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2143 store.sin6.sin6_family = AF_INET6;
2144 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2145 store.sin6.sin6_scope_id = cookie->scope_id;
2146 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2150 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2151 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2155 /* update current state */
2156 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2157 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2158 sctp_stop_all_cookie_timers(stcb);
2159 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2160 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2162 /* set up to notify upper layer */
2163 *notification = SCTP_NOTIFY_ASSOC_UP;
2164 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2165 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2166 (!SCTP_IS_LISTENING(inp))) {
2168 * This is an endpoint that called connect() how it got a
2169 * cookie that is NEW is a bit of a mystery. It must be that
2170 * the INIT was sent, but before it got there.. a complete
2171 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2172 * should have went to the other code.. not here.. oh well..
2173 * a bit of protection is worth having..
2177 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
2178 soisconnected(stcb->sctp_socket);
2179 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2180 (SCTP_IS_LISTENING(inp))) {
2182 * We don't want to do anything with this one. Since it is
2183 * the listening guy. The timer will get started for
2184 * accepted connections in the caller.
2188 if (stcb->asoc.sctp_autoclose_ticks &&
2189 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2190 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2192 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2193 *netp = sctp_findnet(stcb, init_src);
2194 if (*netp != NULL) {
2196 * Since we did not send a HB, make sure we don't double
2199 (*netp)->hb_responded = 1;
2201 /* respond with a COOKIE-ACK */
2202 sctp_send_cookie_ack(stcb);
2205 * check the address lists for any ASCONFs that need to be sent
2206 * AFTER the cookie-ack is sent
2208 sctp_check_address_list(stcb, m,
2209 initack_offset + sizeof(struct sctp_init_ack_chunk),
2210 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2211 &store.sa, cookie->local_scope, cookie->site_scope,
2212 cookie->ipv4_scope, cookie->loopback_scope);
2218 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2219 * we NEED to make sure we are not already using the vtag. If so we
2220 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2221 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2222 SCTP_BASE_INFO(hashasocmark))];
2223 LIST_FOREACH(stcb, head, sctp_asocs) {
2224 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2225 -- SEND ABORT - TRY AGAIN --
2231 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2232 * existing (non-NULL) TCB
2234 static struct mbuf *
2235 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2236 struct sockaddr *src, struct sockaddr *dst,
2237 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2238 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2239 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2240 struct sctp_tcb **locked_tcb,
2241 uint8_t mflowtype, uint32_t mflowid,
2242 uint32_t vrf_id, uint16_t port)
2244 struct sctp_state_cookie *cookie;
2245 struct sctp_tcb *l_stcb = *stcb;
2246 struct sctp_inpcb *l_inp;
2247 struct sockaddr *to;
2248 struct sctp_pcb *ep;
2250 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2252 uint8_t cookie_ok = 0;
2253 unsigned int sig_offset, cookie_offset;
2254 unsigned int cookie_len;
2256 struct timeval time_entered, time_expires;
2257 int notification = 0;
2258 struct sctp_nets *netl;
2259 int had_a_existing_tcb = 0;
2260 int send_int_conf = 0;
2262 struct sockaddr_in sin;
2265 struct sockaddr_in6 sin6;
2268 SCTPDBG(SCTP_DEBUG_INPUT2,
2269 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2271 if (inp_p == NULL) {
2274 cookie = &cp->cookie;
2275 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2276 cookie_len = ntohs(cp->ch.chunk_length);
2278 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2279 sizeof(struct sctp_init_chunk) +
2280 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2281 /* cookie too small */
2284 if ((cookie->peerport != sh->src_port) ||
2285 (cookie->myport != sh->dest_port) ||
2286 (cookie->my_vtag != sh->v_tag)) {
2288 * invalid ports or bad tag. Note that we always leave the
2289 * v_tag in the header in network order and when we stored
2290 * it in the my_vtag slot we also left it in network order.
2291 * This maintains the match even though it may be in the
2292 * opposite byte order of the machine :->
2297 * split off the signature into its own mbuf (since it should not be
2298 * calculated in the sctp_hmac_m() call).
2300 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2301 m_sig = m_split(m, sig_offset, M_NOWAIT);
2302 if (m_sig == NULL) {
2303 /* out of memory or ?? */
2306 #ifdef SCTP_MBUF_LOGGING
2307 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2308 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2313 * compute the signature/digest for the cookie
2315 if (l_stcb != NULL) {
2316 atomic_add_int(&l_stcb->asoc.refcnt, 1);
2317 SCTP_TCB_UNLOCK(l_stcb);
2320 SCTP_INP_RLOCK(l_inp);
2321 if (l_stcb != NULL) {
2322 SCTP_TCB_LOCK(l_stcb);
2323 atomic_subtract_int(&l_stcb->asoc.refcnt, 1);
2325 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2326 SCTP_INP_RUNLOCK(l_inp);
2327 sctp_m_freem(m_sig);
2330 ep = &(*inp_p)->sctp_ep;
2331 /* which cookie is it? */
2332 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2333 (ep->current_secret_number != ep->last_secret_number)) {
2334 /* it's the old cookie */
2335 (void)sctp_hmac_m(SCTP_HMAC,
2336 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2337 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2339 /* it's the current cookie */
2340 (void)sctp_hmac_m(SCTP_HMAC,
2341 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2342 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2344 /* get the signature */
2345 SCTP_INP_RUNLOCK(l_inp);
2346 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2348 /* couldn't find signature */
2349 sctp_m_freem(m_sig);
2352 /* compare the received digest with the computed digest */
2353 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2354 /* try the old cookie? */
2355 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2356 (ep->current_secret_number != ep->last_secret_number)) {
2357 /* compute digest with old */
2358 (void)sctp_hmac_m(SCTP_HMAC,
2359 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2360 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2362 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2370 * Now before we continue we must reconstruct our mbuf so that
2371 * normal processing of any other chunks will work.
2377 while (SCTP_BUF_NEXT(m_at) != NULL) {
2378 m_at = SCTP_BUF_NEXT(m_at);
2380 SCTP_BUF_NEXT(m_at) = m_sig;
2383 if (cookie_ok == 0) {
2384 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2385 SCTPDBG(SCTP_DEBUG_INPUT2,
2386 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2387 (uint32_t)offset, cookie_offset, sig_offset);
2391 if (sctp_ticks_to_msecs(cookie->cookie_life) > SCTP_MAX_COOKIE_LIFE) {
2392 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid cookie lifetime\n");
2395 time_entered.tv_sec = cookie->time_entered.tv_sec;
2396 time_entered.tv_usec = cookie->time_entered.tv_usec;
2397 if ((time_entered.tv_sec < 0) ||
2398 (time_entered.tv_usec < 0) ||
2399 (time_entered.tv_usec >= 1000000)) {
2400 /* Invalid time stamp. Cookie must have been modified. */
2401 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid time stamp\n");
2404 (void)SCTP_GETTIME_TIMEVAL(&now);
2405 if (timevalcmp(&now, &time_entered, <)) {
2406 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie generated in the future!\n");
2410 * Check the cookie timestamps to be sure it's not stale.
2411 * cookie_life is in ticks, so we convert to seconds.
2413 time_expires.tv_sec = time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2414 time_expires.tv_usec = time_entered.tv_usec;
2415 if (timevalcmp(&now, &time_expires, >)) {
2416 /* cookie is stale! */
2417 struct mbuf *op_err;
2418 struct sctp_error_stale_cookie *cause;
2419 struct timeval diff;
2422 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2423 0, M_NOWAIT, 1, MT_DATA);
2424 if (op_err == NULL) {
2429 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2430 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2431 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2432 cause->cause.length = htons(sizeof(struct sctp_error_stale_cookie));
2434 timevalsub(&diff, &time_expires);
2435 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2436 staleness = UINT32_MAX;
2438 staleness = (uint32_t)diff.tv_sec * 1000000;
2440 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2441 staleness += (uint32_t)diff.tv_usec;
2443 staleness = UINT32_MAX;
2445 cause->stale_time = htonl(staleness);
2446 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2447 mflowtype, mflowid, l_inp->fibnum,
2452 * Now we must see with the lookup address if we have an existing
2453 * asoc. This will only happen if we were in the COOKIE-WAIT state
2454 * and a INIT collided with us and somewhere the peer sent the
2455 * cookie on another address besides the single address our assoc
2456 * had for him. In this case we will have one of the tie-tags set at
2457 * least AND the address field in the cookie can be used to look it
2461 switch (cookie->addr_type) {
2463 case SCTP_IPV6_ADDRESS:
2464 memset(&sin6, 0, sizeof(sin6));
2465 sin6.sin6_family = AF_INET6;
2466 sin6.sin6_len = sizeof(sin6);
2467 sin6.sin6_port = sh->src_port;
2468 sin6.sin6_scope_id = cookie->scope_id;
2469 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2470 sizeof(sin6.sin6_addr.s6_addr));
2471 to = (struct sockaddr *)&sin6;
2475 case SCTP_IPV4_ADDRESS:
2476 memset(&sin, 0, sizeof(sin));
2477 sin.sin_family = AF_INET;
2478 sin.sin_len = sizeof(sin);
2479 sin.sin_port = sh->src_port;
2480 sin.sin_addr.s_addr = cookie->address[0];
2481 to = (struct sockaddr *)&sin;
2485 /* This should not happen */
2488 if (*stcb == NULL) {
2489 /* Yep, lets check */
2490 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2491 if (*stcb == NULL) {
2493 * We should have only got back the same inp. If we
2494 * got back a different ep we have a problem. The
2495 * original findep got back l_inp and now
2497 if (l_inp != *inp_p) {
2498 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2501 if (*locked_tcb == NULL) {
2503 * In this case we found the assoc only
2504 * after we locked the create lock. This
2505 * means we are in a colliding case and we
2506 * must make sure that we unlock the tcb if
2507 * its one of the cases where we throw away
2508 * the incoming packets.
2510 *locked_tcb = *stcb;
2513 * We must also increment the inp ref count
2514 * since the ref_count flags was set when we
2515 * did not find the TCB, now we found it
2516 * which reduces the refcount.. we must
2517 * raise it back out to balance it all :-)
2519 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2520 if ((*stcb)->sctp_ep != l_inp) {
2521 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2522 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2528 cookie_len -= SCTP_SIGNATURE_SIZE;
2529 if (*stcb == NULL) {
2530 /* this is the "normal" case... get a new TCB */
2531 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2532 cookie, cookie_len, *inp_p,
2533 netp, to, ¬ification,
2534 auth_skipped, auth_offset, auth_len,
2538 /* this is abnormal... cookie-echo on existing TCB */
2539 had_a_existing_tcb = 1;
2540 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2542 cookie, cookie_len, *inp_p, *stcb, netp, to,
2543 ¬ification, auth_skipped, auth_offset, auth_len,
2546 if (*stcb == NULL) {
2551 if (*stcb == NULL) {
2552 /* still no TCB... must be bad cookie-echo */
2555 if (*netp != NULL) {
2556 (*netp)->flowtype = mflowtype;
2557 (*netp)->flowid = mflowid;
2560 * Ok, we built an association so confirm the address we sent the
2563 netl = sctp_findnet(*stcb, to);
2565 * This code should in theory NOT run but
2568 /* TSNH! Huh, why do I need to add this address here? */
2569 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2570 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2573 netl = sctp_findnet(*stcb, to);
2576 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2577 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2578 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2583 sctp_start_net_timers(*stcb);
2584 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2585 if (!had_a_existing_tcb ||
2586 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2588 * If we have a NEW cookie or the connect never
2589 * reached the connected state during collision we
2590 * must do the TCP accept thing.
2592 struct socket *so, *oso;
2593 struct sctp_inpcb *inp;
2595 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2597 * For a restart we will keep the same
2598 * socket, no need to do anything. I THINK!!
2600 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2601 if (send_int_conf) {
2602 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2603 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2607 oso = (*inp_p)->sctp_socket;
2608 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2609 SCTP_TCB_UNLOCK((*stcb));
2610 CURVNET_SET(oso->so_vnet);
2611 so = sonewconn(oso, 0
2614 SCTP_TCB_LOCK((*stcb));
2615 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2618 struct mbuf *op_err;
2620 /* Too many sockets */
2621 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2622 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2623 sctp_abort_association(*inp_p, NULL, m, iphlen,
2624 src, dst, sh, op_err,
2627 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2628 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2631 inp = (struct sctp_inpcb *)so->so_pcb;
2632 SCTP_INP_INCR_REF(inp);
2634 * We add the unbound flag here so that if we get an
2635 * soabort() before we get the move_pcb done, we
2636 * will properly cleanup.
2638 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2639 SCTP_PCB_FLAGS_CONNECTED |
2640 SCTP_PCB_FLAGS_IN_TCPPOOL |
2641 SCTP_PCB_FLAGS_UNBOUND |
2642 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2643 SCTP_PCB_FLAGS_DONT_WAKE);
2644 inp->sctp_features = (*inp_p)->sctp_features;
2645 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2646 inp->sctp_socket = so;
2647 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2648 inp->max_cwnd = (*inp_p)->max_cwnd;
2649 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2650 inp->ecn_supported = (*inp_p)->ecn_supported;
2651 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2652 inp->auth_supported = (*inp_p)->auth_supported;
2653 inp->asconf_supported = (*inp_p)->asconf_supported;
2654 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2655 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2656 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2657 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2658 inp->sctp_context = (*inp_p)->sctp_context;
2659 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2660 inp->fibnum = (*inp_p)->fibnum;
2662 * copy in the authentication parameters from the
2665 if (inp->sctp_ep.local_hmacs)
2666 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2667 inp->sctp_ep.local_hmacs =
2668 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2669 if (inp->sctp_ep.local_auth_chunks)
2670 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2671 inp->sctp_ep.local_auth_chunks =
2672 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2675 * Now we must move it from one hash table to
2676 * another and get the tcb in the right place.
2680 * This is where the one-2-one socket is put into
2681 * the accept state waiting for the accept!
2684 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2686 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2688 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2689 SCTP_TCB_UNLOCK((*stcb));
2691 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2693 SCTP_TCB_LOCK((*stcb));
2694 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2697 * now we must check to see if we were aborted while
2698 * the move was going on and the lock/unlock
2701 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2703 * yep it was, we leave the assoc attached
2704 * to the socket since the sctp_inpcb_free()
2705 * call will send an abort for us.
2707 SCTP_INP_DECR_REF(inp);
2710 SCTP_INP_DECR_REF(inp);
2711 /* Switch over to the new guy */
2713 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2714 if (send_int_conf) {
2715 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2716 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2720 * Pull it from the incomplete queue and wake the
2728 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2730 if (send_int_conf) {
2731 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2732 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2738 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2739 struct sctp_tcb *stcb, struct sctp_nets *net)
2741 /* cp must not be used, others call this without a c-ack :-) */
2742 struct sctp_association *asoc;
2743 struct sctp_tmit_chunk *chk;
2745 SCTPDBG(SCTP_DEBUG_INPUT2,
2746 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2747 if ((stcb == NULL) || (net == NULL)) {
2752 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2753 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2754 asoc->overall_error_count,
2756 SCTP_FROM_SCTP_INPUT,
2759 sctp_stop_all_cookie_timers(stcb);
2760 sctp_toss_old_cookies(stcb, asoc);
2761 /* process according to association state */
2762 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2763 /* state change only needed when I am in right state */
2764 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2765 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2766 sctp_start_net_timers(stcb);
2768 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2769 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2770 if (asoc->overall_error_count == 0) {
2771 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2772 SCTP_RTT_FROM_NON_DATA);
2775 * Since we did not send a HB make sure we don't double
2778 asoc->overall_error_count = 0;
2779 net->hb_responded = 1;
2780 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2781 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2782 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2783 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2784 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
2785 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2786 soisconnected(stcb->sctp_socket);
2790 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) &&
2791 TAILQ_EMPTY(&asoc->send_queue) &&
2792 TAILQ_EMPTY(&asoc->sent_queue) &&
2793 (asoc->stream_queue_cnt == 0)) {
2794 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2795 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
2796 sctp_stop_timers_for_shutdown(stcb);
2797 sctp_send_shutdown(stcb, net);
2798 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
2799 stcb->sctp_ep, stcb, net);
2800 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2801 stcb->sctp_ep, stcb, NULL);
2802 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_LOCKED);
2805 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2807 * We don't need to do the asconf thing, nor hb or
2808 * autoclose if the socket is closed.
2813 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2816 if (stcb->asoc.sctp_autoclose_ticks &&
2817 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2818 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2819 stcb->sctp_ep, stcb, NULL);
2822 * send ASCONF if parameters are pending and ASCONFs are
2823 * allowed (eg. addresses changed when init/cookie echo were
2826 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2827 (stcb->asoc.asconf_supported == 1) &&
2828 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2829 #ifdef SCTP_TIMER_BASED_ASCONF
2830 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2831 stcb->sctp_ep, stcb,
2832 stcb->asoc.primary_destination);
2834 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2835 SCTP_ADDR_NOT_LOCKED);
2840 /* Restart the timer if we have pending data */
2841 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2842 if (chk->whoTo != NULL) {
2847 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2852 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2853 struct sctp_tcb *stcb)
2855 struct sctp_nets *net;
2856 struct sctp_tmit_chunk *lchk;
2857 struct sctp_ecne_chunk bkup;
2858 uint8_t override_bit;
2859 uint32_t tsn, window_data_tsn;
2861 unsigned int pkt_cnt;
2863 len = ntohs(cp->ch.chunk_length);
2864 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2865 /* Its the old format */
2866 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2867 bkup.num_pkts_since_cwr = htonl(1);
2870 SCTP_STAT_INCR(sctps_recvecne);
2871 tsn = ntohl(cp->tsn);
2872 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2873 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2875 window_data_tsn = stcb->asoc.sending_seq - 1;
2877 window_data_tsn = lchk->rec.data.tsn;
2880 /* Find where it was sent to if possible. */
2882 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2883 if (lchk->rec.data.tsn == tsn) {
2885 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2888 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2894 * What to do. A previous send of a CWR was possibly lost.
2895 * See how old it is, we may have it marked on the actual
2898 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2899 if (tsn == net->last_cwr_tsn) {
2900 /* Found him, send it off */
2906 * If we reach here, we need to send a special CWR
2907 * that says hey, we did this a long time ago and
2908 * you lost the response.
2910 net = TAILQ_FIRST(&stcb->asoc.nets);
2915 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2922 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2923 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2925 * JRS - Use the congestion control given in the pluggable
2928 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2930 * We reduce once every RTT. So we will only lower cwnd at
2931 * the next sending seq i.e. the window_data_tsn
2933 net->cwr_window_tsn = window_data_tsn;
2934 net->ecn_ce_pkt_cnt += pkt_cnt;
2935 net->lost_cnt = pkt_cnt;
2936 net->last_cwr_tsn = tsn;
2938 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2939 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2940 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2942 * Another loss in the same window update how many
2943 * marks/packets lost we have had.
2947 if (pkt_cnt > net->lost_cnt) {
2948 /* Should be the case */
2949 cnt = (pkt_cnt - net->lost_cnt);
2950 net->ecn_ce_pkt_cnt += cnt;
2952 net->lost_cnt = pkt_cnt;
2953 net->last_cwr_tsn = tsn;
2955 * Most CC functions will ignore this call, since we
2956 * are in-window yet of the initial CE the peer saw.
2958 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2962 * We always send a CWR this way if our previous one was lost our
2963 * peer will get an update, or if it is not time again to reduce we
2964 * still get the cwr to the peer. Note we set the override when we
2965 * could not find the TSN on the chunk or the destination network.
2967 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2971 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2974 * Here we get a CWR from the peer. We must look in the outqueue and
2975 * make sure that we have a covered ECNE in the control chunk part.
2978 struct sctp_tmit_chunk *chk, *nchk;
2979 struct sctp_ecne_chunk *ecne;
2983 cwr_tsn = ntohl(cp->tsn);
2984 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
2985 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
2986 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
2989 if ((override == 0) && (chk->whoTo != net)) {
2990 /* Must be from the right src unless override is set */
2993 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
2994 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
2995 /* this covers this ECNE, we can remove it */
2996 stcb->asoc.ecn_echo_cnt_onq--;
2997 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
2999 stcb->asoc.ctrl_queue_cnt--;
3000 sctp_m_freem(chk->data);
3002 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3003 if (override == 0) {
3011 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3012 struct sctp_tcb *stcb, struct sctp_nets *net)
3015 SCTPDBG(SCTP_DEBUG_INPUT2,
3016 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3020 /* process according to association state */
3021 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3022 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3023 SCTPDBG(SCTP_DEBUG_INPUT2,
3024 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3025 SCTP_TCB_UNLOCK(stcb);
3028 /* notify upper layer protocol */
3029 if (stcb->sctp_socket) {
3030 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3033 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3034 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3035 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3036 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3039 /* stop the timer */
3040 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3041 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3042 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3044 SCTPDBG(SCTP_DEBUG_INPUT2,
3045 "sctp_handle_shutdown_complete: calls free-asoc\n");
3046 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3047 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3052 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3053 struct sctp_nets *net, uint8_t flg)
3055 switch (desc->chunk_type) {
3058 /* find the tsn to resend (possibly) */
3061 struct sctp_tmit_chunk *tp1;
3063 tsn = ntohl(desc->tsn_ifany);
3064 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3065 if (tp1->rec.data.tsn == tsn) {
3069 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3077 * Do it the other way , aka without paying
3078 * attention to queue seq order.
3080 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3081 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3082 if (tp1->rec.data.tsn == tsn) {
3089 SCTP_STAT_INCR(sctps_pdrptsnnf);
3091 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3092 if (((flg & SCTP_BADCRC) == 0) &&
3093 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3096 if ((stcb->asoc.peers_rwnd == 0) &&
3097 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3098 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3101 if (stcb->asoc.peers_rwnd == 0 &&
3102 (flg & SCTP_FROM_MIDDLE_BOX)) {
3103 SCTP_STAT_INCR(sctps_pdrpdizrw);
3106 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3107 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3108 /* Payload not matching. */
3109 SCTP_STAT_INCR(sctps_pdrpbadd);
3112 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3113 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3114 /* Payload not matching. */
3115 SCTP_STAT_INCR(sctps_pdrpbadd);
3120 * this guy had a RTO calculation
3121 * pending on it, cancel it
3123 if (tp1->whoTo->rto_needed == 0) {
3124 tp1->whoTo->rto_needed = 1;
3128 SCTP_STAT_INCR(sctps_pdrpmark);
3129 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3130 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3132 * mark it as if we were doing a FR, since
3133 * we will be getting gap ack reports behind
3134 * the info from the router.
3136 tp1->rec.data.doing_fast_retransmit = 1;
3138 * mark the tsn with what sequences can
3141 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3142 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3144 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3147 /* restart the timer */
3148 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3150 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3151 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3154 /* fix counts and things */
3155 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3156 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3157 tp1->whoTo->flight_size,
3159 (uint32_t)(uintptr_t)stcb,
3162 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3163 sctp_flight_size_decrease(tp1);
3164 sctp_total_flight_decrease(stcb, tp1);
3166 tp1->sent = SCTP_DATAGRAM_RESEND;
3172 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3173 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3176 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3178 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3181 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3182 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3183 audit, stcb->asoc.sent_queue_retran_cnt);
3184 #ifndef SCTP_AUDITING_ENABLED
3185 stcb->asoc.sent_queue_retran_cnt = audit;
3193 struct sctp_tmit_chunk *asconf;
3195 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3197 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3202 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3203 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3204 asconf->sent = SCTP_DATAGRAM_RESEND;
3205 asconf->snd_count--;
3209 case SCTP_INITIATION:
3210 /* resend the INIT */
3211 stcb->asoc.dropped_special_cnt++;
3212 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3214 * If we can get it in, in a few attempts we do
3215 * this, otherwise we let the timer fire.
3217 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3219 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3220 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3223 case SCTP_SELECTIVE_ACK:
3224 case SCTP_NR_SELECTIVE_ACK:
3225 /* resend the sack */
3226 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3228 case SCTP_HEARTBEAT_REQUEST:
3229 /* resend a demand HB */
3230 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3232 * Only retransmit if we KNOW we wont destroy the
3235 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3239 sctp_send_shutdown(stcb, net);
3241 case SCTP_SHUTDOWN_ACK:
3242 sctp_send_shutdown_ack(stcb, net);
3244 case SCTP_COOKIE_ECHO:
3246 struct sctp_tmit_chunk *cookie;
3249 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3251 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3256 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3257 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3258 cookie->sent = SCTP_DATAGRAM_RESEND;
3259 sctp_stop_all_cookie_timers(stcb);
3263 case SCTP_COOKIE_ACK:
3264 sctp_send_cookie_ack(stcb);
3266 case SCTP_ASCONF_ACK:
3267 /* resend last asconf ack */
3268 sctp_send_asconf_ack(stcb);
3270 case SCTP_IFORWARD_CUM_TSN:
3271 case SCTP_FORWARD_CUM_TSN:
3272 send_forward_tsn(stcb, &stcb->asoc);
3274 /* can't do anything with these */
3275 case SCTP_PACKET_DROPPED:
3276 case SCTP_INITIATION_ACK: /* this should not happen */
3277 case SCTP_HEARTBEAT_ACK:
3278 case SCTP_ABORT_ASSOCIATION:
3279 case SCTP_OPERATION_ERROR:
3280 case SCTP_SHUTDOWN_COMPLETE:
3290 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3296 * We set things to 0xffffffff since this is the last delivered
3297 * sequence and we will be sending in 0 after the reset.
3300 if (number_entries) {
3301 for (i = 0; i < number_entries; i++) {
3302 temp = ntohs(list[i]);
3303 if (temp >= stcb->asoc.streamincnt) {
3306 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3310 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3311 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3314 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3318 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3323 if (number_entries > 0) {
3324 for (i = 0; i < number_entries; i++) {
3325 temp = ntohs(list[i]);
3326 if (temp >= stcb->asoc.streamoutcnt) {
3327 /* no such stream */
3330 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3331 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3334 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3335 stcb->asoc.strmout[i].next_mid_ordered = 0;
3336 stcb->asoc.strmout[i].next_mid_unordered = 0;
3339 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3343 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3348 if (number_entries > 0) {
3349 for (i = 0; i < number_entries; i++) {
3350 temp = ntohs(list[i]);
3351 if (temp >= stcb->asoc.streamoutcnt) {
3352 /* no such stream */
3355 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3358 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3359 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3364 struct sctp_stream_reset_request *
3365 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3367 struct sctp_association *asoc;
3368 struct sctp_chunkhdr *ch;
3369 struct sctp_stream_reset_request *r;
3370 struct sctp_tmit_chunk *chk;
3374 chk = asoc->str_reset;
3375 if (TAILQ_EMPTY(&asoc->control_send_queue) ||
3377 asoc->stream_reset_outstanding = 0;
3380 if (chk->data == NULL) {
3384 /* he wants a copy of the chk pointer */
3387 clen = chk->send_size;
3388 ch = mtod(chk->data, struct sctp_chunkhdr *);
3389 r = (struct sctp_stream_reset_request *)(ch + 1);
3390 if (ntohl(r->request_seq) == seq) {
3394 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3395 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3396 /* move to the next one, there can only be a max of two */
3397 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3398 if (ntohl(r->request_seq) == seq) {
3402 /* that seq is not here */
3407 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3409 struct sctp_association *asoc;
3410 struct sctp_tmit_chunk *chk;
3413 chk = asoc->str_reset;
3417 asoc->str_reset = NULL;
3418 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3419 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3420 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3421 asoc->ctrl_queue_cnt--;
3423 sctp_m_freem(chk->data);
3426 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3430 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3431 uint32_t seq, uint32_t action,
3432 struct sctp_stream_reset_response *respin)
3436 struct sctp_association *asoc = &stcb->asoc;
3437 struct sctp_tmit_chunk *chk;
3438 struct sctp_stream_reset_request *req_param;
3439 struct sctp_stream_reset_out_request *req_out_param;
3440 struct sctp_stream_reset_in_request *req_in_param;
3441 uint32_t number_entries;
3443 if (asoc->stream_reset_outstanding == 0) {
3447 if (seq == stcb->asoc.str_reset_seq_out) {
3448 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3449 if (req_param != NULL) {
3450 stcb->asoc.str_reset_seq_out++;
3451 type = ntohs(req_param->ph.param_type);
3452 lparam_len = ntohs(req_param->ph.param_length);
3453 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3456 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3457 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3458 asoc->stream_reset_out_is_outstanding = 0;
3459 if (asoc->stream_reset_outstanding)
3460 asoc->stream_reset_outstanding--;
3461 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3463 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3464 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3465 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3466 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3468 * Set it up so we don't stop
3471 asoc->stream_reset_outstanding++;
3472 stcb->asoc.str_reset_seq_out--;
3473 asoc->stream_reset_out_is_outstanding = 1;
3476 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3478 if (no_clear == 0) {
3479 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3481 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3482 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3483 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3484 if (asoc->stream_reset_outstanding)
3485 asoc->stream_reset_outstanding--;
3486 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3487 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3488 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3489 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3490 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3491 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3493 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3494 /* Ok we now may have more streams */
3497 num_stream = stcb->asoc.strm_pending_add_size;
3498 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3500 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3502 stcb->asoc.strm_pending_add_size = 0;
3503 if (asoc->stream_reset_outstanding)
3504 asoc->stream_reset_outstanding--;
3505 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3506 /* Put the new streams into effect */
3509 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3510 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3512 asoc->streamoutcnt += num_stream;
3513 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_ADD, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3514 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3515 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_ADD, stcb, SCTP_STREAM_CHANGE_DENIED, NULL, SCTP_SO_NOT_LOCKED);
3517 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_ADD, stcb, SCTP_STREAM_CHANGE_FAILED, NULL, SCTP_SO_NOT_LOCKED);
3519 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3520 if (asoc->stream_reset_outstanding)
3521 asoc->stream_reset_outstanding--;
3522 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3523 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_ADD, stcb, SCTP_STREAM_CHANGE_DENIED, NULL, SCTP_SO_NOT_LOCKED);
3524 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3525 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_ADD, stcb, SCTP_STREAM_CHANGE_DENIED, NULL, SCTP_SO_NOT_LOCKED);
3527 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3529 * a) Adopt the new in tsn.
3531 * c) Adopt the new out-tsn
3533 struct sctp_stream_reset_response_tsn *resp;
3534 struct sctp_forward_tsn_chunk fwdtsn;
3537 if (respin == NULL) {
3541 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3544 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3545 resp = (struct sctp_stream_reset_response_tsn *)respin;
3546 asoc->stream_reset_outstanding--;
3547 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3548 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3549 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3550 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3554 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3555 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3556 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3559 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3560 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3561 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3563 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3564 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3566 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3567 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3569 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3570 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3571 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_TSN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3572 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3573 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_TSN, stcb, SCTP_ASSOC_RESET_DENIED, NULL, SCTP_SO_NOT_LOCKED);
3575 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_TSN, stcb, SCTP_ASSOC_RESET_FAILED, NULL, SCTP_SO_NOT_LOCKED);
3578 /* get rid of the request and get the request flags */
3579 if (asoc->stream_reset_outstanding == 0) {
3580 sctp_clean_up_stream_reset(stcb);
3584 if (asoc->stream_reset_outstanding == 0) {
3585 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3591 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3592 struct sctp_tmit_chunk *chk,
3593 struct sctp_stream_reset_in_request *req, int trunc)
3601 * peer wants me to send a str-reset to him for my outgoing seq's if
3604 struct sctp_association *asoc = &stcb->asoc;
3606 seq = ntohl(req->request_seq);
3607 if (asoc->str_reset_seq_in == seq) {
3608 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3609 if ((asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ) == 0) {
3610 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3612 /* Can't do it, since they exceeded our buffer size */
3613 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3614 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3615 len = ntohs(req->ph.param_length);
3616 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3617 if (number_entries) {
3618 for (i = 0; i < number_entries; i++) {
3619 temp = ntohs(req->list_of_streams[i]);
3620 if (temp >= stcb->asoc.streamoutcnt) {
3621 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3624 req->list_of_streams[i] = temp;
3626 for (i = 0; i < number_entries; i++) {
3627 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3628 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3633 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3634 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3635 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3638 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3640 /* Can't do it, since we have sent one out */
3641 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3644 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3645 asoc->str_reset_seq_in++;
3646 } else if (asoc->str_reset_seq_in - 1 == seq) {
3647 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3648 } else if (asoc->str_reset_seq_in - 2 == seq) {
3649 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3651 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3653 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3657 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3658 struct sctp_tmit_chunk *chk,
3659 struct sctp_stream_reset_tsn_request *req)
3661 /* reset all in and out and update the tsn */
3663 * A) reset my str-seq's on in and out. B) Select a receive next,
3664 * and set cum-ack to it. Also process this selected number as a
3665 * fwd-tsn as well. C) set in the response my next sending seq.
3667 struct sctp_forward_tsn_chunk fwdtsn;
3668 struct sctp_association *asoc = &stcb->asoc;
3672 seq = ntohl(req->request_seq);
3673 if (asoc->str_reset_seq_in == seq) {
3674 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3675 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3676 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3678 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3679 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3680 fwdtsn.ch.chunk_flags = 0;
3681 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3682 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3686 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3687 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3688 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3690 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3691 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3692 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3693 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3694 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3695 atomic_add_int(&asoc->sending_seq, 1);
3696 /* save off historical data for retrans */
3697 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3698 asoc->last_sending_seq[0] = asoc->sending_seq;
3699 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3700 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3701 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3702 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3703 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3704 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_TSN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3706 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3707 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3708 asoc->str_reset_seq_in++;
3709 } else if (asoc->str_reset_seq_in - 1 == seq) {
3710 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3711 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3712 } else if (asoc->str_reset_seq_in - 2 == seq) {
3713 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3714 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3716 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3722 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3723 struct sctp_tmit_chunk *chk,
3724 struct sctp_stream_reset_out_request *req, int trunc)
3727 int number_entries, len;
3728 struct sctp_association *asoc = &stcb->asoc;
3730 seq = ntohl(req->request_seq);
3732 /* now if its not a duplicate we process it */
3733 if (asoc->str_reset_seq_in == seq) {
3734 len = ntohs(req->ph.param_length);
3735 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3737 * the sender is resetting, handle the list issue.. we must
3738 * a) verify if we can do the reset, if so no problem b) If
3739 * we can't do the reset we must copy the request. c) queue
3740 * it, and setup the data in processor to trigger it off
3741 * when needed and dequeue all the queued data.
3743 tsn = ntohl(req->send_reset_at_tsn);
3745 /* move the reset action back one */
3746 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3747 if ((asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ) == 0) {
3748 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3750 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3751 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3752 /* we can do it now */
3753 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3754 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3757 * we must queue it up and thus wait for the TSN's
3758 * to arrive that are at or before tsn
3760 struct sctp_stream_reset_list *liste;
3763 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3764 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3765 siz, SCTP_M_STRESET);
3766 if (liste == NULL) {
3767 /* gak out of memory */
3768 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3769 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3774 liste->number_entries = number_entries;
3775 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3776 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3777 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3779 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3780 asoc->str_reset_seq_in++;
3781 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3783 * one seq back, just echo back last action since my
3784 * response was lost.
3786 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3787 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3789 * two seq back, just echo back last action since my
3790 * response was lost.
3792 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3794 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3799 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3800 struct sctp_stream_reset_add_strm *str_add)
3803 * Peer is requesting to add more streams. If its within our
3804 * max-streams we will allow it.
3806 uint32_t num_stream, i;
3808 struct sctp_association *asoc = &stcb->asoc;
3809 struct sctp_queued_to_read *ctl, *nctl;
3811 /* Get the number. */
3812 seq = ntohl(str_add->request_seq);
3813 num_stream = ntohs(str_add->number_of_streams);
3814 /* Now what would be the new total? */
3815 if (asoc->str_reset_seq_in == seq) {
3816 num_stream += stcb->asoc.streamincnt;
3817 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3818 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3819 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3820 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3821 (num_stream > 0xffff)) {
3822 /* We must reject it they ask for to many */
3824 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3826 /* Ok, we can do that :-) */
3827 struct sctp_stream_in *oldstrm;
3829 /* save off the old */
3830 oldstrm = stcb->asoc.strmin;
3831 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3832 (num_stream * sizeof(struct sctp_stream_in)),
3834 if (stcb->asoc.strmin == NULL) {
3835 stcb->asoc.strmin = oldstrm;
3838 /* copy off the old data */
3839 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3840 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3841 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3842 stcb->asoc.strmin[i].sid = i;
3843 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3844 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3845 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3846 /* now anything on those queues? */
3847 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3848 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3849 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3851 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3852 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3853 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3856 /* Init the new streams */
3857 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3858 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3859 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3860 stcb->asoc.strmin[i].sid = i;
3861 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3862 stcb->asoc.strmin[i].pd_api_started = 0;
3863 stcb->asoc.strmin[i].delivery_started = 0;
3865 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3866 /* update the size */
3867 stcb->asoc.streamincnt = num_stream;
3868 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3869 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_ADD, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3871 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3872 asoc->str_reset_seq_in++;
3873 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3875 * one seq back, just echo back last action since my
3876 * response was lost.
3878 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3879 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3881 * two seq back, just echo back last action since my
3882 * response was lost.
3884 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3886 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3891 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3892 struct sctp_stream_reset_add_strm *str_add)
3895 * Peer is requesting to add more streams. If its within our
3896 * max-streams we will allow it.
3898 uint16_t num_stream;
3900 struct sctp_association *asoc = &stcb->asoc;
3902 /* Get the number. */
3903 seq = ntohl(str_add->request_seq);
3904 num_stream = ntohs(str_add->number_of_streams);
3905 /* Now what would be the new total? */
3906 if (asoc->str_reset_seq_in == seq) {
3907 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3908 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3909 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3910 } else if (stcb->asoc.stream_reset_outstanding) {
3911 /* We must reject it we have something pending */
3912 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3914 /* Ok, we can do that :-) */
3917 mychk = stcb->asoc.streamoutcnt;
3918 mychk += num_stream;
3919 if (mychk < 0x10000) {
3920 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3921 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3922 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3925 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3928 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3929 asoc->str_reset_seq_in++;
3930 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3932 * one seq back, just echo back last action since my
3933 * response was lost.
3935 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3936 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3938 * two seq back, just echo back last action since my
3939 * response was lost.
3941 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3943 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3948 __attribute__((noinline))
3951 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3952 struct sctp_chunkhdr *ch_req)
3954 uint16_t remaining_length, param_len, ptype;
3955 struct sctp_paramhdr pstore;
3956 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3960 struct sctp_tmit_chunk *chk;
3961 struct sctp_chunkhdr *ch;
3962 struct sctp_paramhdr *ph;
3966 /* now it may be a reset or a reset-response */
3967 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3969 /* setup for adding the response */
3970 sctp_alloc_a_chunk(stcb, chk);
3974 chk->copy_by_ref = 0;
3975 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
3976 chk->rec.chunk_id.can_take_data = 0;
3978 chk->asoc = &stcb->asoc;
3979 chk->no_fr_allowed = 0;
3980 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
3981 chk->book_size_scale = 0;
3982 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
3983 if (chk->data == NULL) {
3986 sctp_m_freem(chk->data);
3989 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3992 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
3994 /* setup chunk parameters */
3995 chk->sent = SCTP_DATAGRAM_UNSENT;
3999 ch = mtod(chk->data, struct sctp_chunkhdr *);
4000 ch->chunk_type = SCTP_STREAM_RESET;
4001 ch->chunk_flags = 0;
4002 ch->chunk_length = htons(chk->send_size);
4003 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4004 offset += sizeof(struct sctp_chunkhdr);
4005 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4006 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4011 param_len = ntohs(ph->param_length);
4012 if ((param_len > remaining_length) ||
4013 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4014 /* bad parameter length */
4017 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4018 (uint8_t *)&cstore);
4023 ptype = ntohs(ph->param_type);
4025 if (param_len > sizeof(cstore)) {
4030 if (num_param > SCTP_MAX_RESET_PARAMS) {
4031 /* hit the max of parameters already sorry.. */
4034 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4035 struct sctp_stream_reset_out_request *req_out;
4037 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4040 req_out = (struct sctp_stream_reset_out_request *)ph;
4042 if (stcb->asoc.stream_reset_outstanding) {
4043 seq = ntohl(req_out->response_seq);
4044 if (seq == stcb->asoc.str_reset_seq_out) {
4046 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4049 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4050 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4051 struct sctp_stream_reset_add_strm *str_add;
4053 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4056 str_add = (struct sctp_stream_reset_add_strm *)ph;
4058 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4059 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4060 struct sctp_stream_reset_add_strm *str_add;
4062 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4065 str_add = (struct sctp_stream_reset_add_strm *)ph;
4067 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4068 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4069 struct sctp_stream_reset_in_request *req_in;
4072 req_in = (struct sctp_stream_reset_in_request *)ph;
4073 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4074 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4075 struct sctp_stream_reset_tsn_request *req_tsn;
4078 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4079 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4081 goto strres_nochunk;
4085 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4086 struct sctp_stream_reset_response *resp;
4089 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4092 resp = (struct sctp_stream_reset_response *)ph;
4093 seq = ntohl(resp->response_seq);
4094 result = ntohl(resp->result);
4095 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4097 goto strres_nochunk;
4102 offset += SCTP_SIZE32(param_len);
4103 if (remaining_length >= SCTP_SIZE32(param_len)) {
4104 remaining_length -= SCTP_SIZE32(param_len);
4106 remaining_length = 0;
4110 /* we have no response free the stuff */
4111 goto strres_nochunk;
4113 /* ok we have a chunk to link in */
4114 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4117 stcb->asoc.ctrl_queue_cnt++;
4122 * Handle a router or endpoints report of a packet loss, there are two ways
4123 * to handle this, either we get the whole packet and must disect it
4124 * ourselves (possibly with truncation and or corruption) or it is a summary
4125 * from a middle box that did the disecting for us.
4128 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4129 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4131 struct sctp_chunk_desc desc;
4132 struct sctp_chunkhdr *chk_hdr;
4133 struct sctp_data_chunk *data_chunk;
4134 struct sctp_idata_chunk *idata_chunk;
4135 uint32_t bottle_bw, on_queue;
4136 uint32_t offset, chk_len;
4137 uint16_t pktdrp_len;
4138 uint8_t pktdrp_flags;
4140 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4141 ("PKTDROP chunk too small"));
4142 pktdrp_flags = cp->ch.chunk_flags;
4143 pktdrp_len = ntohs(cp->ch.chunk_length);
4144 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4145 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4146 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4147 /* The peer plays games with us. */
4151 limit -= sizeof(struct sctp_pktdrop_chunk);
4153 if (offset == limit) {
4154 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4155 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4157 } else if (offset + sizeof(struct sctphdr) > limit) {
4158 /* Only a partial SCTP common header. */
4159 SCTP_STAT_INCR(sctps_pdrpcrupt);
4162 /* XXX: Check embedded SCTP common header. */
4163 offset += sizeof(struct sctphdr);
4165 /* Now parse through the chunks themselves. */
4166 while (offset < limit) {
4167 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4168 SCTP_STAT_INCR(sctps_pdrpcrupt);
4171 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4172 desc.chunk_type = chk_hdr->chunk_type;
4173 /* get amount we need to move */
4174 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4175 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4176 /* Someone is lying... */
4179 if (desc.chunk_type == SCTP_DATA) {
4180 if (stcb->asoc.idata_supported) {
4181 /* Some is playing games with us. */
4184 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4185 /* Some is playing games with us. */
4188 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4190 * Not enough data bytes available in the
4193 SCTP_STAT_INCR(sctps_pdrpnedat);
4196 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4197 /* Not enough data in buffer. */
4200 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4201 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4202 desc.tsn_ifany = data_chunk->dp.tsn;
4203 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4204 SCTP_STAT_INCR(sctps_pdrpmbda);
4206 } else if (desc.chunk_type == SCTP_IDATA) {
4207 if (!stcb->asoc.idata_supported) {
4208 /* Some is playing games with us. */
4211 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4212 /* Some is playing games with us. */
4215 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4217 * Not enough data bytes available in the
4220 SCTP_STAT_INCR(sctps_pdrpnedat);
4223 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4224 /* Not enough data in buffer. */
4227 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4228 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4229 desc.tsn_ifany = idata_chunk->dp.tsn;
4230 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4231 SCTP_STAT_INCR(sctps_pdrpmbda);
4234 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4235 SCTP_STAT_INCR(sctps_pdrpmbct);
4238 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4239 SCTP_STAT_INCR(sctps_pdrppdbrk);
4243 offset += SCTP_SIZE32(chk_len);
4245 /* Now update any rwnd --- possibly */
4246 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4247 /* From a peer, we get a rwnd report */
4250 SCTP_STAT_INCR(sctps_pdrpfehos);
4252 bottle_bw = ntohl(cp->bottle_bw);
4253 on_queue = ntohl(cp->current_onq);
4254 if (bottle_bw && on_queue) {
4255 /* a rwnd report is in here */
4256 if (bottle_bw > on_queue)
4257 a_rwnd = bottle_bw - on_queue;
4262 stcb->asoc.peers_rwnd = 0;
4264 if (a_rwnd > stcb->asoc.total_flight) {
4265 stcb->asoc.peers_rwnd =
4266 a_rwnd - stcb->asoc.total_flight;
4268 stcb->asoc.peers_rwnd = 0;
4270 if (stcb->asoc.peers_rwnd <
4271 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4272 /* SWS sender side engages */
4273 stcb->asoc.peers_rwnd = 0;
4278 SCTP_STAT_INCR(sctps_pdrpfmbox);
4281 /* now middle boxes in sat networks get a cwnd bump */
4282 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4283 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4284 (stcb->asoc.sat_network)) {
4286 * This is debatable but for sat networks it makes sense
4287 * Note if a T3 timer has went off, we will prohibit any
4288 * changes to cwnd until we exit the t3 loss recovery.
4290 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4291 net, cp, &bottle_bw, &on_queue);
4296 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4297 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4298 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4299 * length of the complete packet outputs: - length: modified to remaining
4300 * length after control processing - netp: modified to new sctp_nets after
4301 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4302 * bad packet,...) otherwise return the tcb for this packet
4305 __attribute__((noinline))
4307 static struct sctp_tcb *
4308 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4309 struct sockaddr *src, struct sockaddr *dst,
4310 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4311 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4312 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4313 uint32_t vrf_id, uint16_t port)
4315 struct sctp_association *asoc;
4316 struct mbuf *op_err;
4317 char msg[SCTP_DIAG_INFO_LEN];
4319 int num_chunks = 0; /* number of control chunks processed */
4320 uint32_t chk_length, contiguous;
4322 int abort_no_unlock = 0;
4327 * How big should this be, and should it be alloc'd? Lets try the
4328 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4329 * until we get into jumbo grams and such..
4331 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4333 uint32_t auth_offset = 0, auth_len = 0;
4334 int auth_skipped = 0;
4337 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4338 iphlen, *offset, length, (void *)stcb);
4341 SCTP_TCB_LOCK_ASSERT(stcb);
4343 /* validate chunk header length... */
4344 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4345 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4346 ntohs(ch->chunk_length));
4351 * validate the verification tag
4353 vtag_in = ntohl(sh->v_tag);
4355 if (ch->chunk_type == SCTP_INITIATION) {
4356 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4357 ntohs(ch->chunk_length), vtag_in);
4359 /* protocol error- silently discard... */
4360 SCTP_STAT_INCR(sctps_badvtag);
4362 SCTP_TCB_UNLOCK(stcb);
4366 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4368 * If there is no stcb, skip the AUTH chunk and process
4369 * later after a stcb is found (to validate the lookup was
4372 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4374 (inp->auth_supported == 1)) {
4375 /* save this chunk for later processing */
4377 auth_offset = *offset;
4378 auth_len = ntohs(ch->chunk_length);
4380 /* (temporarily) move past this chunk */
4381 *offset += SCTP_SIZE32(auth_len);
4382 if (*offset >= length) {
4383 /* no more data left in the mbuf chain */
4387 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4388 sizeof(struct sctp_chunkhdr), chunk_buf);
4395 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4396 goto process_control_chunks;
4399 * first check if it's an ASCONF with an unknown src addr we
4400 * need to look inside to find the association
4402 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4403 struct sctp_chunkhdr *asconf_ch = ch;
4404 uint32_t asconf_offset = 0, asconf_len = 0;
4406 /* inp's refcount may be reduced */
4407 SCTP_INP_INCR_REF(inp);
4409 asconf_offset = *offset;
4411 asconf_len = ntohs(asconf_ch->chunk_length);
4412 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4414 stcb = sctp_findassociation_ep_asconf(m,
4417 sh, &inp, netp, vrf_id);
4420 asconf_offset += SCTP_SIZE32(asconf_len);
4421 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4422 sizeof(struct sctp_chunkhdr), chunk_buf);
4423 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4426 * reduce inp's refcount if not reduced in
4427 * sctp_findassociation_ep_asconf().
4429 SCTP_INP_DECR_REF(inp);
4432 /* now go back and verify any auth chunk to be sure */
4433 if (auth_skipped && (stcb != NULL)) {
4434 struct sctp_auth_chunk *auth;
4436 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4437 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4443 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4445 /* auth HMAC failed so dump it */
4449 /* remaining chunks are HMAC checked */
4450 stcb->asoc.authenticated = 1;
4455 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4456 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4458 /* no association, so it's out of the blue... */
4459 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4460 mflowtype, mflowid, inp->fibnum,
4466 /* ABORT and SHUTDOWN can use either v_tag... */
4467 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4468 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4469 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4470 /* Take the T-bit always into account. */
4471 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4472 (vtag_in == asoc->my_vtag)) ||
4473 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4474 (asoc->peer_vtag != htonl(0)) &&
4475 (vtag_in == asoc->peer_vtag))) {
4478 /* drop this packet... */
4479 SCTP_STAT_INCR(sctps_badvtag);
4481 SCTP_TCB_UNLOCK(stcb);
4486 /* for all other chunks, vtag must match */
4487 if (vtag_in != asoc->my_vtag) {
4488 /* invalid vtag... */
4489 SCTPDBG(SCTP_DEBUG_INPUT3,
4490 "invalid vtag: %xh, expect %xh\n",
4491 vtag_in, asoc->my_vtag);
4492 SCTP_STAT_INCR(sctps_badvtag);
4494 SCTP_TCB_UNLOCK(stcb);
4500 } /* end if !SCTP_COOKIE_ECHO */
4502 * process all control chunks...
4504 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4505 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4506 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4507 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4508 /* implied cookie-ack.. we must have lost the ack */
4509 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4513 process_control_chunks:
4514 while (IS_SCTP_CONTROL(ch)) {
4515 /* validate chunk length */
4516 chk_length = ntohs(ch->chunk_length);
4517 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4518 ch->chunk_type, chk_length);
4519 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4520 if (chk_length < sizeof(*ch) ||
4521 (*offset + (int)chk_length) > length) {
4525 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4527 * INIT and INIT-ACK only gets the init ack "header" portion
4528 * only because we don't have to process the peer's COOKIE.
4529 * All others get a complete chunk.
4531 switch (ch->chunk_type) {
4532 case SCTP_INITIATION:
4533 contiguous = sizeof(struct sctp_init_chunk);
4535 case SCTP_INITIATION_ACK:
4536 contiguous = sizeof(struct sctp_init_ack_chunk);
4539 contiguous = min(chk_length, sizeof(chunk_buf));
4542 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4551 /* Save off the last place we got a control from */
4553 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4555 * allow last_control to be NULL if
4556 * ASCONF... ASCONF processing will find the
4559 if ((netp != NULL) && (*netp != NULL))
4560 stcb->asoc.last_control_chunk_from = *netp;
4563 #ifdef SCTP_AUDITING_ENABLED
4564 sctp_audit_log(0xB0, ch->chunk_type);
4567 /* check to see if this chunk required auth, but isn't */
4568 if ((stcb != NULL) &&
4569 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4570 !stcb->asoc.authenticated) {
4571 /* "silently" ignore */
4572 SCTP_STAT_INCR(sctps_recvauthmissing);
4575 switch (ch->chunk_type) {
4576 case SCTP_INITIATION:
4577 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4578 /* The INIT chunk must be the only chunk. */
4579 if ((num_chunks > 1) ||
4580 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4582 * RFC 4960bis requires stopping the
4583 * processing of the packet.
4588 /* Honor our resource limit. */
4589 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4590 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4591 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
4592 mflowtype, mflowid, inp->fibnum,
4596 SCTP_TCB_UNLOCK(stcb);
4600 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4601 (struct sctp_init_chunk *)ch, inp,
4607 SCTP_TCB_UNLOCK(stcb);
4611 case SCTP_PAD_CHUNK:
4613 case SCTP_INITIATION_ACK:
4614 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4615 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4616 /* We are not interested anymore */
4617 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4622 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4623 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4628 /* The INIT-ACK chunk must be the only chunk. */
4629 if ((num_chunks > 1) ||
4630 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4634 if ((netp != NULL) && (*netp != NULL)) {
4635 ret = sctp_handle_init_ack(m, iphlen, *offset,
4637 (struct sctp_init_ack_chunk *)ch,
4646 if (abort_no_unlock) {
4650 * Special case, I must call the output routine to
4651 * get the cookie echoed
4653 if ((stcb != NULL) && (ret == 0)) {
4654 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4658 case SCTP_SELECTIVE_ACK:
4659 case SCTP_NR_SELECTIVE_ACK:
4662 uint32_t a_rwnd, cum_ack;
4663 uint16_t num_seg, num_nr_seg, num_dup;
4665 int offset_seg, offset_dup;
4667 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4668 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4669 SCTP_STAT_INCR(sctps_recvsacks);
4671 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4672 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4675 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4676 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4677 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4681 if (stcb->asoc.nrsack_supported == 0) {
4684 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4685 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4689 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4691 * If we have sent a shutdown-ack, we will pay no
4692 * attention to a sack sent in to us since
4693 * we don't care anymore.
4697 flags = ch->chunk_flags;
4698 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4699 struct sctp_sack_chunk *sack;
4701 sack = (struct sctp_sack_chunk *)ch;
4702 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4703 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4705 num_dup = ntohs(sack->sack.num_dup_tsns);
4706 a_rwnd = ntohl(sack->sack.a_rwnd);
4707 if (sizeof(struct sctp_sack_chunk) +
4708 num_seg * sizeof(struct sctp_gap_ack_block) +
4709 num_dup * sizeof(uint32_t) != chk_length) {
4710 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4713 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4714 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4716 struct sctp_nr_sack_chunk *nr_sack;
4718 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4719 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4720 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4721 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4722 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4723 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4724 if (sizeof(struct sctp_nr_sack_chunk) +
4725 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4726 num_dup * sizeof(uint32_t) != chk_length) {
4727 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4730 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4731 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4733 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4734 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4735 cum_ack, num_seg, a_rwnd);
4736 stcb->asoc.seen_a_sack_this_pkt = 1;
4737 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4738 (num_seg == 0) && (num_nr_seg == 0) &&
4739 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4740 (stcb->asoc.saw_sack_with_frags == 0) &&
4741 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4742 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4744 * We have a SIMPLE sack having no
4745 * prior segments and data on sent
4746 * queue to be acked. Use the faster
4747 * path sack processing. We also
4748 * allow window update sacks with no
4749 * missing segments to go this way
4752 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4753 &abort_now, ecne_seen);
4755 if ((netp != NULL) && (*netp != NULL)) {
4756 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4757 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4758 cum_ack, a_rwnd, ecne_seen);
4762 /* ABORT signal from sack processing */
4766 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4767 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4768 (stcb->asoc.stream_queue_cnt == 0)) {
4769 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4773 case SCTP_HEARTBEAT_REQUEST:
4774 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4775 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4776 SCTP_STAT_INCR(sctps_recvheartbeat);
4777 sctp_send_heartbeat_ack(stcb, m, *offset,
4781 case SCTP_HEARTBEAT_ACK:
4782 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4783 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4787 SCTP_STAT_INCR(sctps_recvheartbeatack);
4788 if ((netp != NULL) && (*netp != NULL)) {
4789 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4793 case SCTP_ABORT_ASSOCIATION:
4794 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4797 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4798 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4808 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4810 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4813 if ((netp != NULL) && (*netp != NULL)) {
4815 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4816 stcb, *netp, &abort_flag);
4823 case SCTP_SHUTDOWN_ACK:
4824 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4825 if ((chk_length == sizeof(struct sctp_shutdown_ack_chunk)) &&
4826 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4827 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4832 case SCTP_OPERATION_ERROR:
4833 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4834 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4835 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4840 case SCTP_COOKIE_ECHO:
4841 SCTPDBG(SCTP_DEBUG_INPUT3,
4842 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4843 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4846 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4847 /* We are not interested anymore */
4850 SCTP_TCB_UNLOCK(stcb);
4857 * First are we accepting? We do this again here
4858 * since it is possible that a previous endpoint WAS
4859 * listening responded to a INIT-ACK and then
4860 * closed. We opened and bound.. and are now no
4863 * XXXGL: notes on checking listen queue length.
4864 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4865 * SOLISTENING(), because a listening "UDP type"
4866 * socket isn't listening in terms of the socket
4867 * layer. It is a normal data flow socket, that
4868 * can fork off new connections. Thus, we should
4869 * look into sol_qlen only in case we are !UDP.
4870 * 2) Checking sol_qlen in general requires locking
4871 * the socket, and this code lacks that.
4873 if ((stcb == NULL) &&
4874 (!SCTP_IS_LISTENING(inp) ||
4875 (((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) == 0) &&
4876 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4877 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4878 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4879 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4880 sctp_abort_association(inp, stcb, m, iphlen,
4881 src, dst, sh, op_err,
4888 struct mbuf *ret_buf;
4889 struct sctp_inpcb *linp;
4890 struct sctp_tmit_chunk *chk;
4892 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
4893 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4904 SCTP_ASOC_CREATE_LOCK(linp);
4908 struct sctp_tcb *locked_stcb;
4912 sctp_handle_cookie_echo(m, iphlen,
4916 (struct sctp_cookie_echo_chunk *)ch,
4926 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4927 SCTP_TCB_UNLOCK(locked_stcb);
4930 SCTP_TCB_LOCK_ASSERT(stcb);
4936 SCTP_ASOC_CREATE_UNLOCK(linp);
4938 if (ret_buf == NULL) {
4940 SCTP_TCB_UNLOCK(stcb);
4942 SCTPDBG(SCTP_DEBUG_INPUT3,
4943 "GAK, null buffer\n");
4947 /* if AUTH skipped, see if it verified... */
4952 /* Restart the timer if we have pending data */
4953 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4954 if (chk->whoTo != NULL) {
4959 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4963 case SCTP_COOKIE_ACK:
4964 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4965 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4968 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4969 /* We are not interested anymore */
4970 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4973 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4974 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
4979 if ((netp != NULL) && (*netp != NULL)) {
4980 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
4984 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
4988 if (stcb->asoc.ecn_supported == 0) {
4991 if ((chk_length != sizeof(struct sctp_ecne_chunk)) &&
4992 (chk_length != sizeof(struct old_sctp_ecne_chunk))) {
4995 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
4999 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5003 if (stcb->asoc.ecn_supported == 0) {
5006 if (chk_length != sizeof(struct sctp_cwr_chunk)) {
5009 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5011 case SCTP_SHUTDOWN_COMPLETE:
5012 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5013 /* must be first and only chunk */
5014 if ((num_chunks > 1) ||
5015 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5019 if ((chk_length == sizeof(struct sctp_shutdown_complete_chunk)) &&
5020 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5021 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5028 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5030 if (stcb->asoc.asconf_supported == 0) {
5033 sctp_handle_asconf(m, *offset, src,
5034 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5038 case SCTP_ASCONF_ACK:
5039 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5043 if (stcb->asoc.asconf_supported == 0) {
5046 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5049 if ((netp != NULL) && (*netp != NULL)) {
5050 /* He's alive so give him credit */
5051 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5052 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5053 stcb->asoc.overall_error_count,
5055 SCTP_FROM_SCTP_INPUT,
5058 stcb->asoc.overall_error_count = 0;
5059 sctp_handle_asconf_ack(m, *offset,
5060 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5061 if (abort_no_unlock)
5065 case SCTP_FORWARD_CUM_TSN:
5066 case SCTP_IFORWARD_CUM_TSN:
5067 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5068 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5072 if (stcb->asoc.prsctp_supported == 0) {
5075 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5078 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5079 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5080 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5081 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5083 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5085 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5086 sctp_abort_an_association(inp, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
5091 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5092 /* We are not interested anymore */
5093 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5094 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5099 * For sending a SACK this looks like DATA chunks.
5101 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5103 sctp_handle_forward_tsn(stcb,
5104 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5110 case SCTP_STREAM_RESET:
5111 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5115 if (stcb->asoc.reconfig_supported == 0) {
5118 if (chk_length < sizeof(struct sctp_stream_reset_tsn_req)) {
5121 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5122 /* stop processing */
5127 case SCTP_PACKET_DROPPED:
5128 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5132 if (stcb->asoc.pktdrop_supported == 0) {
5135 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5138 if ((netp != NULL) && (*netp != NULL)) {
5139 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5141 min(chk_length, contiguous));
5144 case SCTP_AUTHENTICATION:
5145 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5147 /* save the first AUTH for later processing */
5148 if (auth_skipped == 0) {
5149 auth_offset = *offset;
5150 auth_len = chk_length;
5153 /* skip this chunk (temporarily) */
5156 if (stcb->asoc.auth_supported == 0) {
5159 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5160 (chk_length > (sizeof(struct sctp_auth_chunk) +
5161 SCTP_AUTH_DIGEST_LEN_MAX))) {
5166 if (got_auth == 1) {
5167 /* skip this chunk... it's already auth'd */
5171 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5172 /* auth HMAC failed so dump the packet */
5176 /* remaining chunks are HMAC checked */
5177 stcb->asoc.authenticated = 1;
5183 /* it's an unknown chunk! */
5184 if ((ch->chunk_type & 0x40) &&
5186 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5187 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5188 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5189 struct sctp_gen_error_cause *cause;
5192 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5193 0, M_NOWAIT, 1, MT_DATA);
5194 if (op_err != NULL) {
5195 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5196 cause = mtod(op_err, struct sctp_gen_error_cause *);
5197 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5198 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5199 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5200 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5201 if (SCTP_BUF_NEXT(op_err) != NULL) {
5202 #ifdef SCTP_MBUF_LOGGING
5203 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5204 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5207 sctp_queue_op_err(stcb, op_err);
5209 sctp_m_freem(op_err);
5213 if ((ch->chunk_type & 0x80) == 0) {
5214 /* discard this packet */
5217 } /* else skip this bad chunk and continue... */
5219 } /* switch (ch->chunk_type) */
5222 /* get the next chunk */
5223 *offset += SCTP_SIZE32(chk_length);
5224 if (*offset >= length) {
5225 /* no more data left in the mbuf chain */
5228 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5229 sizeof(struct sctp_chunkhdr), chunk_buf);
5236 if ((asconf_cnt > 0) && (stcb != NULL)) {
5237 sctp_send_asconf_ack(stcb);
5243 * common input chunk processing (v4 and v6)
5246 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5247 struct sockaddr *src, struct sockaddr *dst,
5248 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5249 uint8_t compute_crc,
5251 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5252 uint32_t vrf_id, uint16_t port)
5254 char msg[SCTP_DIAG_INFO_LEN];
5255 struct mbuf *m = *mm, *op_err;
5256 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5257 struct sctp_tcb *stcb = NULL;
5258 struct sctp_nets *net = NULL;
5260 uint32_t cksum_in_hdr;
5262 int cnt_ctrl_ready = 0;
5263 int fwd_tsn_seen = 0, data_processed = 0;
5264 bool cksum_validated, stcb_looked_up;
5266 SCTP_STAT_INCR(sctps_recvdatagrams);
5267 #ifdef SCTP_AUDITING_ENABLED
5268 sctp_audit_log(0xE0, 1);
5269 sctp_auditing(0, inp, stcb, net);
5272 stcb_looked_up = false;
5273 if (compute_crc != 0) {
5274 cksum_validated = false;
5275 cksum_in_hdr = sh->checksum;
5276 if (cksum_in_hdr != htonl(0)) {
5277 uint32_t cksum_calculated;
5281 cksum_calculated = sctp_calculate_cksum(m, iphlen);
5282 sh->checksum = cksum_in_hdr;
5283 if (cksum_calculated != cksum_in_hdr) {
5284 if (stcb_looked_up) {
5286 * The packet has a zero checksum,
5287 * which is not the correct CRC, no
5288 * stcb has been found or an stcb
5289 * has been found but an incorrect
5290 * zero checksum is not acceptable.
5292 KASSERT(cksum_in_hdr == htonl(0),
5293 ("cksum in header not zero: %x",
5294 ntohl(cksum_in_hdr)));
5295 if ((inp == NULL) &&
5296 (SCTP_BASE_SYSCTL(sctp_ootb_with_zero_cksum) == 1)) {
5298 * This is an OOTB packet,
5299 * depending on the sysctl
5300 * variable, pretend that
5302 * acceptable, to allow an
5303 * appropriate response
5304 * (ABORT, for examlpe) to
5307 KASSERT(stcb == NULL,
5308 ("stcb is %p", stcb));
5309 SCTP_STAT_INCR(sctps_recvzerocrc);
5310 goto cksum_validated;
5313 stcb = sctp_findassociation_addr(m, offset, src, dst,
5314 sh, ch, &inp, &net, vrf_id);
5316 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad cksum in SCTP packet:%x calculated:%x m:%p mlen:%d iphlen:%d\n",
5317 ntohl(cksum_in_hdr), ntohl(cksum_calculated), (void *)m, length, iphlen);
5318 #if defined(INET) || defined(INET6)
5319 if ((ch->chunk_type != SCTP_INITIATION) &&
5320 (net != NULL) && (net->port != port)) {
5321 if (net->port == 0) {
5323 * UDP encapsulation turned
5326 net->mtu -= sizeof(struct udphdr);
5327 if (stcb->asoc.smallest_mtu > net->mtu) {
5328 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5330 } else if (port == 0) {
5332 * UDP encapsulation turned
5335 net->mtu += sizeof(struct udphdr);
5336 /* XXX Update smallest_mtu */
5342 net->flowtype = mflowtype;
5343 net->flowid = mflowid;
5345 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5346 if ((inp != NULL) && (stcb != NULL)) {
5347 if (stcb->asoc.pktdrop_supported) {
5348 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5349 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5351 } else if ((inp != NULL) && (stcb == NULL)) {
5354 SCTP_STAT_INCR(sctps_badsum);
5355 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5358 cksum_validated = true;
5361 KASSERT(cksum_validated || cksum_in_hdr == htonl(0),
5362 ("cksum 0x%08x not zero and not validated", ntohl(cksum_in_hdr)));
5363 if (!cksum_validated) {
5364 stcb = sctp_findassociation_addr(m, offset, src, dst,
5365 sh, ch, &inp, &net, vrf_id);
5366 stcb_looked_up = true;
5368 goto validate_cksum;
5370 if (stcb->asoc.rcv_edmid == SCTP_EDMID_NONE) {
5371 goto validate_cksum;
5373 KASSERT(stcb->asoc.rcv_edmid == SCTP_EDMID_LOWER_LAYER_DTLS,
5374 ("Unexpected EDMID %u", stcb->asoc.rcv_edmid));
5375 SCTP_STAT_INCR(sctps_recvzerocrc);
5379 /* Destination port of 0 is illegal, based on RFC4960. */
5380 if (sh->dest_port == htons(0)) {
5381 SCTP_STAT_INCR(sctps_hdrops);
5382 if ((stcb == NULL) && (inp != NULL)) {
5387 if (!stcb_looked_up) {
5388 stcb = sctp_findassociation_addr(m, offset, src, dst,
5389 sh, ch, &inp, &net, vrf_id);
5391 #if defined(INET) || defined(INET6)
5392 if ((ch->chunk_type != SCTP_INITIATION) &&
5393 (net != NULL) && (net->port != port)) {
5394 if (net->port == 0) {
5395 /* UDP encapsulation turned on. */
5396 net->mtu -= sizeof(struct udphdr);
5397 if (stcb->asoc.smallest_mtu > net->mtu) {
5398 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5400 } else if (port == 0) {
5401 /* UDP encapsulation turned off. */
5402 net->mtu += sizeof(struct udphdr);
5403 /* XXX Update smallest_mtu */
5409 net->flowtype = mflowtype;
5410 net->flowid = mflowid;
5413 SCTP_STAT_INCR(sctps_noport);
5414 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5415 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5418 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5419 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5420 sctp_send_shutdown_complete2(src, dst, sh,
5421 mflowtype, mflowid, fibnum,
5425 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5426 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5429 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5430 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5431 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5432 (ch->chunk_type != SCTP_INIT))) {
5433 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5435 sctp_send_abort(m, iphlen, src, dst,
5437 mflowtype, mflowid, fibnum,
5442 } else if (stcb == NULL) {
5445 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5446 (void *)m, iphlen, offset, length, (void *)stcb);
5448 /* always clear this before beginning a packet */
5449 stcb->asoc.authenticated = 0;
5450 stcb->asoc.seen_a_sack_this_pkt = 0;
5451 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5452 (void *)stcb, stcb->asoc.state);
5454 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5455 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5457 * If we hit here, we had a ref count
5458 * up when the assoc was aborted and the
5459 * timer is clearing out the assoc, we should
5460 * NOT respond to any packet.. its OOTB.
5462 SCTP_TCB_UNLOCK(stcb);
5464 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5465 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5466 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5468 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5469 mflowtype, mflowid, inp->fibnum,
5474 if (IS_SCTP_CONTROL(ch)) {
5475 /* process the control portion of the SCTP packet */
5476 /* sa_ignore NO_NULL_CHK */
5477 stcb = sctp_process_control(m, iphlen, &offset, length,
5479 inp, stcb, &net, &fwd_tsn_seen,
5480 mflowtype, mflowid, fibnum,
5484 * This covers us if the cookie-echo was there and
5485 * it changes our INP.
5487 inp = stcb->sctp_ep;
5488 #if defined(INET) || defined(INET6)
5489 if ((ch->chunk_type != SCTP_INITIATION) &&
5490 (net != NULL) && (net->port != port)) {
5491 if (net->port == 0) {
5492 /* UDP encapsulation turned on. */
5493 net->mtu -= sizeof(struct udphdr);
5494 if (stcb->asoc.smallest_mtu > net->mtu) {
5495 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5497 } else if (port == 0) {
5498 /* UDP encapsulation turned off. */
5499 net->mtu += sizeof(struct udphdr);
5500 /* XXX Update smallest_mtu */
5508 * no control chunks, so pre-process DATA chunks (these
5509 * checks are taken care of by control processing)
5513 * if DATA only packet, and auth is required, then punt...
5514 * can't have authenticated without any AUTH (control)
5517 if ((stcb != NULL) &&
5518 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5519 /* "silently" ignore */
5520 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5521 SCTP_STAT_INCR(sctps_recvauthmissing);
5525 /* out of the blue DATA chunk */
5526 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5527 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5528 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5530 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5531 mflowtype, mflowid, fibnum,
5535 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5536 /* v_tag mismatch! */
5537 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5538 SCTP_STAT_INCR(sctps_badvtag);
5543 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5546 * no valid TCB for this packet, or we found it's a bad
5547 * packet while processing control, or we're done with this
5548 * packet (done or skip rest of data), so we drop it...
5554 * DATA chunk processing
5556 /* plow through the data chunks while length > offset */
5559 * Rest should be DATA only. Check authentication state if AUTH for
5562 if ((length > offset) &&
5564 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5565 !stcb->asoc.authenticated) {
5566 /* "silently" ignore */
5567 SCTP_STAT_INCR(sctps_recvauthmissing);
5568 SCTPDBG(SCTP_DEBUG_AUTH1,
5569 "Data chunk requires AUTH, skipped\n");
5572 if (length > offset) {
5576 * First check to make sure our state is correct. We would
5577 * not get here unless we really did have a tag, so we don't
5578 * abort if this happens, just dump the chunk silently.
5580 switch (SCTP_GET_STATE(stcb)) {
5581 case SCTP_STATE_COOKIE_ECHOED:
5583 * we consider data with valid tags in this state
5584 * shows us the cookie-ack was lost. Imply it was
5587 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5589 case SCTP_STATE_COOKIE_WAIT:
5591 * We consider OOTB any data sent during asoc setup.
5593 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5594 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5596 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5597 mflowtype, mflowid, inp->fibnum,
5600 /* sa_ignore NOTREACHED */
5602 case SCTP_STATE_EMPTY: /* should not happen */
5603 case SCTP_STATE_INUSE: /* should not happen */
5604 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5605 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5608 /* sa_ignore NOTREACHED */
5610 case SCTP_STATE_OPEN:
5611 case SCTP_STATE_SHUTDOWN_SENT:
5614 /* plow through the data chunks while length > offset */
5615 retval = sctp_process_data(mm, iphlen, &offset, length,
5616 inp, stcb, net, &high_tsn);
5619 * The association aborted, NO UNLOCK needed since
5620 * the association is destroyed.
5629 * Anything important needs to have been m_copy'ed in
5634 /* take care of ecn */
5635 if ((data_processed == 1) &&
5636 (stcb->asoc.ecn_supported == 1) &&
5637 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5638 /* Yep, we need to add a ECNE */
5639 sctp_send_ecn_echo(stcb, net, high_tsn);
5642 if ((data_processed == 0) && (fwd_tsn_seen)) {
5644 uint32_t highest_tsn;
5646 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5647 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5649 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5651 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5652 stcb->asoc.send_sack = 1;
5653 sctp_sack_check(stcb, was_a_gap);
5654 } else if (fwd_tsn_seen) {
5655 stcb->asoc.send_sack = 1;
5657 /* trigger send of any chunks in queue... */
5659 #ifdef SCTP_AUDITING_ENABLED
5660 sctp_audit_log(0xE0, 2);
5661 sctp_auditing(1, inp, stcb, net);
5663 SCTPDBG(SCTP_DEBUG_INPUT1,
5664 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5665 stcb->asoc.peers_rwnd,
5666 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5667 stcb->asoc.total_flight);
5668 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5669 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5670 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5672 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5674 stcb->asoc.trigger_reset ||
5676 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5677 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5678 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5679 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5681 #ifdef SCTP_AUDITING_ENABLED
5682 sctp_audit_log(0xE0, 3);
5683 sctp_auditing(2, inp, stcb, net);
5687 SCTP_TCB_UNLOCK(stcb);
5689 if (inp_decr != NULL) {
5690 /* reduce ref-count */
5691 SCTP_INP_WLOCK(inp_decr);
5692 SCTP_INP_DECR_REF(inp_decr);
5693 SCTP_INP_WUNLOCK(inp_decr);
5700 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5704 uint32_t vrf_id = 0;
5706 struct sockaddr_in src, dst;
5709 struct sctp_chunkhdr *ch;
5711 uint8_t compute_crc;
5717 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5718 SCTP_RELEASE_PKT(i_pak);
5721 m = SCTP_HEADER_TO_CHAIN(i_pak);
5722 #ifdef SCTP_MBUF_LOGGING
5723 /* Log in any input mbufs */
5724 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5725 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5728 #ifdef SCTP_PACKET_LOGGING
5729 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5733 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5734 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5736 if_name(m->m_pkthdr.rcvif),
5737 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5738 mflowid = m->m_pkthdr.flowid;
5739 mflowtype = M_HASHTYPE_GET(m);
5740 fibnum = M_GETFIB(m);
5741 SCTP_STAT_INCR(sctps_recvpackets);
5742 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5743 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5744 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5745 if (SCTP_BUF_LEN(m) < offset) {
5746 if ((m = m_pullup(m, offset)) == NULL) {
5747 SCTP_STAT_INCR(sctps_hdrops);
5751 ip = mtod(m, struct ip *);
5752 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5753 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5754 offset -= sizeof(struct sctp_chunkhdr);
5755 memset(&src, 0, sizeof(struct sockaddr_in));
5756 src.sin_family = AF_INET;
5757 src.sin_len = sizeof(struct sockaddr_in);
5758 src.sin_port = sh->src_port;
5759 src.sin_addr = ip->ip_src;
5760 memset(&dst, 0, sizeof(struct sockaddr_in));
5761 dst.sin_family = AF_INET;
5762 dst.sin_len = sizeof(struct sockaddr_in);
5763 dst.sin_port = sh->dest_port;
5764 dst.sin_addr = ip->ip_dst;
5765 length = ntohs(ip->ip_len);
5766 /* Validate mbuf chain length with IP payload length. */
5767 if (SCTP_HEADER_LEN(m) != length) {
5768 SCTPDBG(SCTP_DEBUG_INPUT1,
5769 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5770 SCTP_STAT_INCR(sctps_hdrops);
5773 /* SCTP does not allow broadcasts or multicasts */
5774 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5777 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5780 ecn_bits = ip->ip_tos;
5781 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5782 SCTP_STAT_INCR(sctps_recvhwcrc);
5785 SCTP_STAT_INCR(sctps_recvswcrc);
5788 sctp_common_input_processing(&m, iphlen, offset, length,
5789 (struct sockaddr *)&src,
5790 (struct sockaddr *)&dst,
5794 mflowtype, mflowid, fibnum,
5803 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5804 extern int *sctp_cpuarry;
5808 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5815 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5821 uint32_t flowid, tag;
5823 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5824 flowid = m->m_pkthdr.flowid;
5827 * No flow id built by lower layers fix it so we
5830 offset = off + sizeof(struct sctphdr);
5831 if (SCTP_BUF_LEN(m) < offset) {
5832 if ((m = m_pullup(m, offset)) == NULL) {
5833 SCTP_STAT_INCR(sctps_hdrops);
5834 return (IPPROTO_DONE);
5837 ip = mtod(m, struct ip *);
5838 sh = (struct sctphdr *)((caddr_t)ip + off);
5839 tag = htonl(sh->v_tag);
5840 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5841 m->m_pkthdr.flowid = flowid;
5842 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5844 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5845 sctp_queue_to_mcore(m, off, cpu_to_use);
5846 return (IPPROTO_DONE);
5849 sctp_input_with_port(m, off, 0);
5850 return (IPPROTO_DONE);