2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
39 #include <netinet/sctp_var.h>
40 #include <netinet/sctp_sysctl.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctputil.h>
44 #include <netinet/sctp_output.h>
45 #include <netinet/sctp_input.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_indata.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_bsd_addr.h>
50 #include <netinet/sctp_timer.h>
51 #include <netinet/sctp_crc32.h>
52 #include <netinet/sctp_kdtrace.h>
53 #if defined(INET) || defined(INET6)
54 #include <netinet/udp.h>
59 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
61 struct sctp_nets *net;
64 * This now not only stops all cookie timers it also stops any INIT
65 * timers as well. This will make sure that the timers are stopped
66 * in all collision cases.
68 SCTP_TCB_LOCK_ASSERT(stcb);
69 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
70 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
71 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
74 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
75 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
76 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
79 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
86 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
87 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
88 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
89 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_no_unlock,
90 uint8_t mflowtype, uint32_t mflowid,
91 uint32_t vrf_id, uint16_t port)
93 struct sctp_init *init;
96 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
101 /* Validate parameters */
103 if ((ntohl(init->initiate_tag) == 0) ||
104 (ntohl(init->a_rwnd) < SCTP_MIN_RWND) ||
105 (ntohs(init->num_inbound_streams) == 0) ||
106 (ntohs(init->num_outbound_streams) == 0)) {
107 /* protocol error... send abort */
108 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
109 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
113 *abort_no_unlock = 1;
116 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
117 offset + ntohs(cp->ch.chunk_length))) {
118 /* auth parameter(s) error... send abort */
119 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
120 "Problem with AUTH parameters");
121 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
125 *abort_no_unlock = 1;
128 /* We are only accepting if we have a listening socket. */
129 if ((stcb == NULL) &&
130 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
131 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
132 (!SCTP_IS_LISTENING(inp)))) {
134 * FIX ME ?? What about TCP model and we have a
135 * match/restart case? Actually no fix is needed. the lookup
136 * will always find the existing assoc so stcb would not be
137 * NULL. It may be questionable to do this since we COULD
138 * just send back the INIT-ACK and hope that the app did
139 * accept()'s by the time the COOKIE was sent. But there is
140 * a price to pay for COOKIE generation and I don't want to
141 * pay it on the chance that the app will actually do some
142 * accepts(). The App just looses and should NOT be in this
145 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
146 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
148 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
149 mflowtype, mflowid, inp->fibnum,
154 if ((stcb != NULL) &&
155 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
156 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
157 sctp_send_shutdown_ack(stcb, NULL);
158 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
160 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
161 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
168 SCTP_INP_RUNLOCK(inp);
173 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
177 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked)
181 struct sctp_stream_queue_pending *sp;
182 struct sctp_association *asoc;
185 * This function returns if any stream has true unsent data on it.
186 * Note that as it looks through it will clean up any places that
187 * have old data that has been sent but left at top of stream queue.
191 SCTP_TCB_SEND_LOCK(stcb);
192 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
193 /* Check to see if some data queued */
194 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
195 /* sa_ignore FREED_MEMORY */
196 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
200 if ((sp->msg_is_complete) &&
202 (sp->sender_all_done)) {
204 * We are doing differed cleanup. Last time
205 * through when we took all the data the
206 * sender_all_done was not set.
208 if (sp->put_last_out == 0) {
209 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
210 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
216 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
217 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
218 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp, 1);
220 sctp_free_remote_addr(sp->net);
224 sctp_m_freem(sp->data);
227 sctp_free_a_strmoq(stcb, sp, so_locked);
228 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
234 if (unsent_data > 0) {
239 SCTP_TCB_SEND_UNLOCK(stcb);
240 return (unsent_data);
244 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
246 struct sctp_init *init;
247 struct sctp_association *asoc;
248 struct sctp_nets *lnet;
253 /* save off parameters */
254 asoc->peer_vtag = ntohl(init->initiate_tag);
255 asoc->peers_rwnd = ntohl(init->a_rwnd);
257 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
259 if (!TAILQ_EMPTY(&asoc->nets)) {
260 /* update any ssthresh's that may have a default */
261 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
262 lnet->ssthresh = asoc->peers_rwnd;
263 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
264 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
268 SCTP_TCB_SEND_LOCK(stcb);
269 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
271 struct sctp_stream_out *outs;
272 struct sctp_stream_queue_pending *sp, *nsp;
273 struct sctp_tmit_chunk *chk, *nchk;
275 /* abandon the upper streams */
276 newcnt = ntohs(init->num_inbound_streams);
277 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
278 if (chk->rec.data.sid >= newcnt) {
279 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
280 asoc->send_queue_cnt--;
281 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
282 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
285 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
288 if (chk->data != NULL) {
289 sctp_free_bufspace(stcb, asoc, chk, 1);
290 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
291 0, chk, SCTP_SO_NOT_LOCKED);
293 sctp_m_freem(chk->data);
297 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
298 /* sa_ignore FREED_MEMORY */
302 for (i = newcnt; i < asoc->pre_open_streams; i++) {
303 outs = &asoc->strmout[i];
304 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
305 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
306 TAILQ_REMOVE(&outs->outqueue, sp, next);
307 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
308 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
309 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
311 sctp_m_freem(sp->data);
315 sctp_free_remote_addr(sp->net);
319 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
320 /* sa_ignore FREED_MEMORY */
322 outs->state = SCTP_STREAM_CLOSED;
325 /* cut back the count */
326 asoc->pre_open_streams = newcnt;
328 SCTP_TCB_SEND_UNLOCK(stcb);
329 asoc->streamoutcnt = asoc->pre_open_streams;
331 for (i = 0; i < asoc->streamoutcnt; i++) {
332 asoc->strmout[i].state = SCTP_STREAM_OPEN;
335 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
336 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
337 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
338 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
340 /* This is the next one we expect */
341 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
343 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
344 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
346 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
347 /* open the requested streams */
349 if (asoc->strmin != NULL) {
350 /* Free the old ones */
351 for (i = 0; i < asoc->streamincnt; i++) {
352 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
353 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
355 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
357 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
358 asoc->streamincnt = ntohs(init->num_outbound_streams);
360 asoc->streamincnt = asoc->max_inbound_streams;
362 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
363 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
364 if (asoc->strmin == NULL) {
365 /* we didn't get memory for the streams! */
366 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
369 for (i = 0; i < asoc->streamincnt; i++) {
370 asoc->strmin[i].sid = i;
371 asoc->strmin[i].last_mid_delivered = 0xffffffff;
372 TAILQ_INIT(&asoc->strmin[i].inqueue);
373 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
374 asoc->strmin[i].pd_api_started = 0;
375 asoc->strmin[i].delivery_started = 0;
378 * load_address_from_init will put the addresses into the
379 * association when the COOKIE is processed or the INIT-ACK is
380 * processed. Both types of COOKIE's existing and new call this
381 * routine. It will remove addresses that are no longer in the
382 * association (for the restarting case where addresses are
383 * removed). Up front when the INIT arrives we will discard it if it
384 * is a restart and new addresses have been added.
386 /* sa_ignore MEMLEAK */
391 * INIT-ACK message processing/consumption returns value < 0 on error
394 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
395 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
396 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
397 struct sctp_nets *net, int *abort_no_unlock,
398 uint8_t mflowtype, uint32_t mflowid,
401 struct sctp_association *asoc;
403 int retval, abort_flag, cookie_found;
405 int nat_friendly = 0;
407 /* First verify that we have no illegal param's */
411 op_err = sctp_arethere_unrecognized_parameters(m,
412 (offset + sizeof(struct sctp_init_chunk)),
413 &abort_flag, (struct sctp_chunkhdr *)cp,
414 &nat_friendly, &cookie_found);
416 /* Send an abort and notify peer */
417 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
418 *abort_no_unlock = 1;
424 /* Only report the missing cookie parameter */
425 if (op_err != NULL) {
426 sctp_m_freem(op_err);
428 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
429 /* We abort with an error of missing mandatory param */
430 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
431 if (op_err != NULL) {
432 struct sctp_error_missing_param *cause;
434 SCTP_BUF_LEN(op_err) = len;
435 cause = mtod(op_err, struct sctp_error_missing_param *);
436 /* Subtract the reserved param */
437 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
438 cause->cause.length = htons(len);
439 cause->num_missing_params = htonl(1);
440 cause->type[0] = htons(SCTP_STATE_COOKIE);
442 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
443 src, dst, sh, op_err,
446 *abort_no_unlock = 1;
450 asoc->peer_supports_nat = (uint8_t)nat_friendly;
451 /* process the peer's parameters in the INIT-ACK */
452 if (sctp_process_init((struct sctp_init_chunk *)cp, stcb) < 0) {
453 if (op_err != NULL) {
454 sctp_m_freem(op_err);
456 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
457 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
458 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
459 src, dst, sh, op_err,
462 *abort_no_unlock = 1;
465 initack_limit = offset + ntohs(cp->ch.chunk_length);
466 /* load all addresses */
467 if ((retval = sctp_load_addresses_from_init(stcb, m,
468 offset + sizeof(struct sctp_init_chunk),
469 initack_limit, src, dst, NULL, stcb->asoc.port)) < 0) {
470 if (op_err != NULL) {
471 sctp_m_freem(op_err);
473 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
474 "Problem with address parameters");
475 SCTPDBG(SCTP_DEBUG_INPUT1,
476 "Load addresses from INIT causes an abort %d\n",
478 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
479 src, dst, sh, op_err,
482 *abort_no_unlock = 1;
485 /* if the peer doesn't support asconf, flush the asconf queue */
486 if (asoc->asconf_supported == 0) {
487 struct sctp_asconf_addr *param, *nparam;
489 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
490 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
491 SCTP_FREE(param, SCTP_M_ASC_ADDR);
495 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
496 stcb->asoc.local_hmacs);
498 sctp_queue_op_err(stcb, op_err);
499 /* queuing will steal away the mbuf chain to the out queue */
502 /* extract the cookie and queue it to "echo" it back... */
503 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
504 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
505 stcb->asoc.overall_error_count,
507 SCTP_FROM_SCTP_INPUT,
510 stcb->asoc.overall_error_count = 0;
511 net->error_count = 0;
514 * Cancel the INIT timer, We do this first before queueing the
515 * cookie. We always cancel at the primary to assue that we are
516 * canceling the timer started by the INIT which always goes to the
519 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
520 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
522 /* calculate the RTO */
523 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
524 SCTP_RTT_FROM_NON_DATA);
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)) {
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 new_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
685 atomic_add_int(&stcb->asoc.refcnt, 1);
686 SCTP_TCB_UNLOCK(stcb);
687 SCTP_INP_INFO_WLOCK();
689 atomic_subtract_int(&stcb->asoc.refcnt, 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, 1, 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_handle_shutdown(struct sctp_shutdown_chunk *cp,
834 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
836 struct sctp_association *asoc;
837 int some_on_streamwheel;
840 SCTPDBG(SCTP_DEBUG_INPUT2,
841 "sctp_handle_shutdown: handling SHUTDOWN\n");
845 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
846 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
849 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
850 /* Shutdown NOT the expected size */
853 old_state = SCTP_GET_STATE(stcb);
854 sctp_update_acked(stcb, cp, abort_flag);
858 if (asoc->control_pdapi) {
860 * With a normal shutdown we assume the end of last record.
862 SCTP_INP_READ_LOCK(stcb->sctp_ep);
863 if (asoc->control_pdapi->on_strm_q) {
864 struct sctp_stream_in *strm;
866 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
867 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
869 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
870 asoc->control_pdapi->on_strm_q = 0;
871 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
873 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
874 asoc->control_pdapi->on_strm_q = 0;
877 panic("Unknown state on ctrl:%p on_strm_q:%d",
879 asoc->control_pdapi->on_strm_q);
883 asoc->control_pdapi->end_added = 1;
884 asoc->control_pdapi->pdapi_aborted = 1;
885 asoc->control_pdapi = NULL;
886 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
887 if (stcb->sctp_socket) {
888 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
891 /* goto SHUTDOWN_RECEIVED state to block new requests */
892 if (stcb->sctp_socket) {
893 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
894 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
895 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
896 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
898 * notify upper layer that peer has initiated a
901 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
904 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
907 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
909 * stop the shutdown timer, since we WILL move to
912 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
913 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
915 /* Now is there unsent data on a stream somewhere? */
916 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
918 if (!TAILQ_EMPTY(&asoc->send_queue) ||
919 !TAILQ_EMPTY(&asoc->sent_queue) ||
920 some_on_streamwheel) {
921 /* By returning we will push more data out */
924 /* no outstanding data to send, so move on... */
925 /* send SHUTDOWN-ACK */
926 /* move to SHUTDOWN-ACK-SENT state */
927 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
928 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
929 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
931 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
932 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
933 sctp_stop_timers_for_shutdown(stcb);
934 sctp_send_shutdown_ack(stcb, net);
935 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
936 stcb->sctp_ep, stcb, net);
937 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
938 sctp_send_shutdown_ack(stcb, net);
944 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
945 struct sctp_tcb *stcb,
946 struct sctp_nets *net)
948 struct sctp_association *asoc;
950 SCTPDBG(SCTP_DEBUG_INPUT2,
951 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
956 /* process according to association state */
957 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
958 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
959 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
960 sctp_send_shutdown_complete(stcb, net, 1);
961 SCTP_TCB_UNLOCK(stcb);
964 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
965 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
966 /* unexpected SHUTDOWN-ACK... so ignore... */
967 SCTP_TCB_UNLOCK(stcb);
970 if (asoc->control_pdapi) {
972 * With a normal shutdown we assume the end of last record.
974 SCTP_INP_READ_LOCK(stcb->sctp_ep);
975 asoc->control_pdapi->end_added = 1;
976 asoc->control_pdapi->pdapi_aborted = 1;
977 asoc->control_pdapi = NULL;
978 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
979 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
982 if (!TAILQ_EMPTY(&asoc->send_queue) ||
983 !TAILQ_EMPTY(&asoc->sent_queue) ||
984 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
985 panic("Queues are not empty when handling SHUTDOWN-ACK");
989 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
990 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
991 /* send SHUTDOWN-COMPLETE */
992 sctp_send_shutdown_complete(stcb, net, 0);
993 /* notify upper layer protocol */
994 if (stcb->sctp_socket) {
995 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
996 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
997 stcb->sctp_socket->so_snd.sb_cc = 0;
999 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1001 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1002 /* free the TCB but first save off the ep */
1003 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1004 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1008 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type)
1010 switch (chunk_type) {
1011 case SCTP_ASCONF_ACK:
1013 sctp_asconf_cleanup(stcb);
1015 case SCTP_IFORWARD_CUM_TSN:
1016 case SCTP_FORWARD_CUM_TSN:
1017 stcb->asoc.prsctp_supported = 0;
1020 SCTPDBG(SCTP_DEBUG_INPUT2,
1021 "Peer does not support chunk type %d (0x%x).\n",
1022 chunk_type, chunk_type);
1028 * Skip past the param header and then we will find the param that caused the
1029 * problem. There are a number of param's in a ASCONF OR the prsctp param
1030 * these will turn of specific features.
1031 * XXX: Is this the right thing to do?
1034 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1036 switch (parameter_type) {
1038 case SCTP_PRSCTP_SUPPORTED:
1039 stcb->asoc.prsctp_supported = 0;
1041 case SCTP_SUPPORTED_CHUNK_EXT:
1043 /* draft-ietf-tsvwg-addip-sctp */
1044 case SCTP_HAS_NAT_SUPPORT:
1045 stcb->asoc.peer_supports_nat = 0;
1047 case SCTP_ADD_IP_ADDRESS:
1048 case SCTP_DEL_IP_ADDRESS:
1049 case SCTP_SET_PRIM_ADDR:
1050 stcb->asoc.asconf_supported = 0;
1052 case SCTP_SUCCESS_REPORT:
1053 case SCTP_ERROR_CAUSE_IND:
1054 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1055 SCTPDBG(SCTP_DEBUG_INPUT2,
1056 "Turning off ASCONF to this strange peer\n");
1057 stcb->asoc.asconf_supported = 0;
1060 SCTPDBG(SCTP_DEBUG_INPUT2,
1061 "Peer does not support param type %d (0x%x)??\n",
1062 parameter_type, parameter_type);
1068 sctp_handle_error(struct sctp_chunkhdr *ch,
1069 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1071 struct sctp_error_cause *cause;
1072 struct sctp_association *asoc;
1073 uint32_t remaining_length, adjust;
1074 uint16_t code, cause_code, cause_length;
1076 /* parse through all of the errors and process */
1078 cause = (struct sctp_error_cause *)((caddr_t)ch +
1079 sizeof(struct sctp_chunkhdr));
1080 remaining_length = ntohs(ch->chunk_length);
1081 if (remaining_length > limit) {
1082 remaining_length = limit;
1084 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1085 remaining_length -= sizeof(struct sctp_chunkhdr);
1087 remaining_length = 0;
1090 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1091 /* Process an Error Cause */
1092 cause_code = ntohs(cause->code);
1093 cause_length = ntohs(cause->length);
1094 if ((cause_length > remaining_length) || (cause_length == 0)) {
1095 /* Invalid cause length, possibly due to truncation. */
1096 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1097 remaining_length, cause_length);
1101 /* report the first error cause */
1104 switch (cause_code) {
1105 case SCTP_CAUSE_INVALID_STREAM:
1106 case SCTP_CAUSE_MISSING_PARAM:
1107 case SCTP_CAUSE_INVALID_PARAM:
1108 case SCTP_CAUSE_NO_USER_DATA:
1109 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1112 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1113 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ERROR flags: %x\n",
1115 if (sctp_handle_nat_colliding_state(stcb)) {
1119 case SCTP_CAUSE_NAT_MISSING_STATE:
1120 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ERROR flags: %x\n",
1122 if (sctp_handle_nat_missing_state(stcb, net)) {
1126 case SCTP_CAUSE_STALE_COOKIE:
1128 * We only act if we have echoed a cookie and are
1131 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1132 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1133 struct sctp_error_stale_cookie *stale_cookie;
1135 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1136 /* stable_time is in usec, convert to msec. */
1137 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time) / 1000;
1138 /* Double it to be more robust on RTX. */
1139 asoc->cookie_preserve_req *= 2;
1140 asoc->stale_cookie_count++;
1141 if (asoc->stale_cookie_count >
1142 asoc->max_init_times) {
1143 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1144 /* now free the asoc */
1145 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1146 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1149 /* blast back to INIT state */
1150 sctp_toss_old_cookies(stcb, &stcb->asoc);
1151 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1152 sctp_stop_all_cookie_timers(stcb);
1153 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1156 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1158 * Nothing we can do here, we don't do hostname
1159 * addresses so if the peer does not like my IPv6
1160 * (or IPv4 for that matter) it does not matter. If
1161 * they don't support that type of address, they can
1162 * NOT possibly get that packet type... i.e. with no
1163 * IPv6 you can't receive a IPv6 packet. so we can
1164 * safely ignore this one. If we ever added support
1165 * for HOSTNAME Addresses, then we would need to do
1169 case SCTP_CAUSE_UNRECOG_CHUNK:
1170 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1171 struct sctp_error_unrecognized_chunk *unrec_chunk;
1173 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1174 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type);
1177 case SCTP_CAUSE_UNRECOG_PARAM:
1178 /* XXX: We only consider the first parameter */
1179 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1180 struct sctp_paramhdr *unrec_parameter;
1182 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1183 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1186 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1188 * We ignore this since the timer will drive out a
1189 * new cookie anyway and there timer will drive us
1190 * to send a SHUTDOWN_COMPLETE. We can't send one
1191 * here since we don't have their tag.
1194 case SCTP_CAUSE_DELETING_LAST_ADDR:
1195 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1196 case SCTP_CAUSE_DELETING_SRC_ADDR:
1198 * We should NOT get these here, but in a
1201 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1204 case SCTP_CAUSE_OUT_OF_RESC:
1206 * And what, pray tell do we do with the fact that
1207 * the peer is out of resources? Not really sure we
1208 * could do anything but abort. I suspect this
1209 * should have came WITH an abort instead of in a
1214 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1218 adjust = SCTP_SIZE32(cause_length);
1219 if (remaining_length >= adjust) {
1220 remaining_length -= adjust;
1222 remaining_length = 0;
1224 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1226 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1231 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1232 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1233 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1234 struct sctp_nets *net, int *abort_no_unlock,
1235 uint8_t mflowtype, uint32_t mflowid,
1238 struct sctp_init_ack *init_ack;
1239 struct mbuf *op_err;
1241 SCTPDBG(SCTP_DEBUG_INPUT2,
1242 "sctp_handle_init_ack: handling INIT-ACK\n");
1245 SCTPDBG(SCTP_DEBUG_INPUT2,
1246 "sctp_handle_init_ack: TCB is null\n");
1249 init_ack = &cp->init;
1250 /* Validate parameters. */
1251 if ((ntohl(init_ack->initiate_tag) == 0) ||
1252 (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) ||
1253 (ntohs(init_ack->num_inbound_streams) == 0) ||
1254 (ntohs(init_ack->num_outbound_streams) == 0)) {
1255 /* protocol error... send an abort */
1256 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1257 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1258 src, dst, sh, op_err,
1261 *abort_no_unlock = 1;
1264 /* process according to association state... */
1265 switch (SCTP_GET_STATE(stcb)) {
1266 case SCTP_STATE_COOKIE_WAIT:
1267 /* this is the expected state for this chunk */
1268 /* process the INIT-ACK parameters */
1269 if (stcb->asoc.primary_destination->dest_state &
1270 SCTP_ADDR_UNCONFIRMED) {
1272 * The primary is where we sent the INIT, we can
1273 * always consider it confirmed when the INIT-ACK is
1274 * returned. Do this before we load addresses
1277 stcb->asoc.primary_destination->dest_state &=
1278 ~SCTP_ADDR_UNCONFIRMED;
1279 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1280 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1282 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1283 net, abort_no_unlock,
1286 /* error in parsing parameters */
1289 /* update our state */
1290 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1291 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1293 /* reset the RTO calc */
1294 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1295 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1296 stcb->asoc.overall_error_count,
1298 SCTP_FROM_SCTP_INPUT,
1301 stcb->asoc.overall_error_count = 0;
1302 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1304 * collapse the init timer back in case of a exponential
1307 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1310 * the send at the end of the inbound data processing will
1311 * cause the cookie to be sent
1314 case SCTP_STATE_SHUTDOWN_SENT:
1315 /* incorrect state... discard */
1317 case SCTP_STATE_COOKIE_ECHOED:
1318 /* incorrect state... discard */
1320 case SCTP_STATE_OPEN:
1321 /* incorrect state... discard */
1323 case SCTP_STATE_EMPTY:
1324 case SCTP_STATE_INUSE:
1326 /* incorrect state... discard */
1330 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1334 static struct sctp_tcb *
1335 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1336 struct sockaddr *src, struct sockaddr *dst,
1337 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1338 struct sctp_inpcb *inp, struct sctp_nets **netp,
1339 struct sockaddr *init_src, int *notification,
1340 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1341 uint8_t mflowtype, uint32_t mflowid,
1342 uint32_t vrf_id, uint16_t port);
1345 * handle a state cookie for an existing association m: input packet mbuf
1346 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1347 * "split" mbuf and the cookie signature does not exist offset: offset into
1348 * mbuf to the cookie-echo chunk
1350 static struct sctp_tcb *
1351 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1352 struct sockaddr *src, struct sockaddr *dst,
1353 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1354 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1355 struct sockaddr *init_src, int *notification,
1356 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1357 uint8_t mflowtype, uint32_t mflowid,
1358 uint32_t vrf_id, uint16_t port)
1360 struct sctp_association *asoc;
1361 struct sctp_init_chunk *init_cp, init_buf;
1362 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1363 struct sctp_asconf_addr *aparam, *naparam;
1364 struct sctp_asconf_ack *aack, *naack;
1365 struct sctp_tmit_chunk *chk, *nchk;
1366 struct sctp_stream_reset_list *strrst, *nstrrst;
1367 struct sctp_queued_to_read *sq, *nsq;
1368 struct sctp_nets *net;
1369 struct mbuf *op_err;
1371 int init_offset, initack_offset, i;
1375 #if defined(SCTP_DETAILED_STR_STATS)
1380 /* I know that the TCB is non-NULL from the caller */
1382 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1383 if (asoc->cookie_how[how_indx] == 0)
1386 if (how_indx < sizeof(asoc->cookie_how)) {
1387 asoc->cookie_how[how_indx] = 1;
1389 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1390 /* SHUTDOWN came in after sending INIT-ACK */
1391 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1392 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1393 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1394 mflowtype, mflowid, inp->fibnum,
1396 if (how_indx < sizeof(asoc->cookie_how))
1397 asoc->cookie_how[how_indx] = 2;
1398 SCTP_TCB_UNLOCK(stcb);
1402 * find and validate the INIT chunk in the cookie (peer's info) the
1403 * INIT should start after the cookie-echo header struct (chunk
1404 * header, state cookie header struct)
1406 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1408 init_cp = (struct sctp_init_chunk *)
1409 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1410 (uint8_t *)&init_buf);
1411 if (init_cp == NULL) {
1412 /* could not pull a INIT chunk in cookie */
1413 SCTP_TCB_UNLOCK(stcb);
1416 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1417 SCTP_TCB_UNLOCK(stcb);
1421 * find and validate the INIT-ACK chunk in the cookie (my info) the
1422 * INIT-ACK follows the INIT chunk
1424 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1425 initack_cp = (struct sctp_init_ack_chunk *)
1426 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1427 (uint8_t *)&initack_buf);
1428 if (initack_cp == NULL) {
1429 /* could not pull INIT-ACK chunk in cookie */
1430 SCTP_TCB_UNLOCK(stcb);
1433 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1434 SCTP_TCB_UNLOCK(stcb);
1437 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1438 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1440 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1441 * to get into the OPEN state
1443 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1445 * Opps, this means that we somehow generated two vtag's
1446 * the same. I.e. we did:
1448 * <---INIT(tag=a)------
1449 * ----INIT-ACK(tag=t)-->
1450 * ----INIT(tag=t)------> *1
1451 * <---INIT-ACK(tag=a)---
1452 * <----CE(tag=t)------------- *2
1454 * At point *1 we should be generating a different
1455 * tag t'. Which means we would throw away the CE and send
1456 * ours instead. Basically this is case C (throw away side).
1458 if (how_indx < sizeof(asoc->cookie_how))
1459 asoc->cookie_how[how_indx] = 17;
1460 SCTP_TCB_UNLOCK(stcb);
1463 switch (SCTP_GET_STATE(stcb)) {
1464 case SCTP_STATE_COOKIE_WAIT:
1465 case SCTP_STATE_COOKIE_ECHOED:
1467 * INIT was sent but got a COOKIE_ECHO with the
1468 * correct tags... just accept it...but we must
1469 * process the init so that we can make sure we have
1470 * the right seq no's.
1472 /* First we must process the INIT !! */
1473 if (sctp_process_init(init_cp, stcb) < 0) {
1474 if (how_indx < sizeof(asoc->cookie_how))
1475 asoc->cookie_how[how_indx] = 3;
1476 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1477 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1478 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1479 src, dst, sh, op_err,
1484 /* we have already processed the INIT so no problem */
1485 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1487 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1488 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1490 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1491 /* update current state */
1492 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1493 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1495 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1497 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1498 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1499 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1500 stcb->sctp_ep, stcb, NULL);
1502 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1503 sctp_stop_all_cookie_timers(stcb);
1504 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1505 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1506 (!SCTP_IS_LISTENING(inp))) {
1508 * Here is where collision would go if we
1509 * did a connect() and instead got a
1510 * init/init-ack/cookie done before the
1511 * init-ack came back..
1513 stcb->sctp_ep->sctp_flags |=
1514 SCTP_PCB_FLAGS_CONNECTED;
1515 soisconnected(stcb->sctp_socket);
1517 /* notify upper layer */
1518 *notification = SCTP_NOTIFY_ASSOC_UP;
1520 * since we did not send a HB make sure we don't
1523 old.tv_sec = cookie->time_entered.tv_sec;
1524 old.tv_usec = cookie->time_entered.tv_usec;
1525 net->hb_responded = 1;
1526 sctp_calculate_rto(stcb, asoc, net, &old,
1527 SCTP_RTT_FROM_NON_DATA);
1529 if (stcb->asoc.sctp_autoclose_ticks &&
1530 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1531 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1537 * we're in the OPEN state (or beyond), so peer must
1538 * have simply lost the COOKIE-ACK
1542 sctp_stop_all_cookie_timers(stcb);
1543 if ((retval = sctp_load_addresses_from_init(stcb, m,
1544 init_offset + sizeof(struct sctp_init_chunk),
1545 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1546 if (how_indx < sizeof(asoc->cookie_how))
1547 asoc->cookie_how[how_indx] = 4;
1548 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1549 "Problem with address parameters");
1550 SCTPDBG(SCTP_DEBUG_INPUT1,
1551 "Load addresses from INIT causes an abort %d\n",
1553 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1554 src, dst, sh, op_err,
1559 /* respond with a COOKIE-ACK */
1560 sctp_toss_old_cookies(stcb, asoc);
1561 sctp_send_cookie_ack(stcb);
1562 if (how_indx < sizeof(asoc->cookie_how))
1563 asoc->cookie_how[how_indx] = 5;
1567 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1568 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1569 cookie->tie_tag_my_vtag == 0 &&
1570 cookie->tie_tag_peer_vtag == 0) {
1572 * case C in Section 5.2.4 Table 2: XMOO silently discard
1574 if (how_indx < sizeof(asoc->cookie_how))
1575 asoc->cookie_how[how_indx] = 6;
1576 SCTP_TCB_UNLOCK(stcb);
1580 * If nat support, and the below and stcb is established, send back
1581 * a ABORT(colliding state) if we are established.
1583 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1584 (asoc->peer_supports_nat) &&
1585 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1586 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1587 (asoc->peer_vtag == 0)))) {
1589 * Special case - Peer's support nat. We may have two init's
1590 * that we gave out the same tag on since one was not
1591 * established.. i.e. we get INIT from host-1 behind the nat
1592 * and we respond tag-a, we get a INIT from host-2 behind
1593 * the nat and we get tag-a again. Then we bring up host-1
1594 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1595 * Now we have colliding state. We must send an abort here
1596 * with colliding state indication.
1598 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1599 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1600 mflowtype, mflowid, inp->fibnum,
1602 SCTP_TCB_UNLOCK(stcb);
1605 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1606 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1607 (asoc->peer_vtag == 0))) {
1609 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1610 * should be ok, re-accept peer info
1612 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1614 * Extension of case C. If we hit this, then the
1615 * random number generator returned the same vtag
1616 * when we first sent our INIT-ACK and when we later
1617 * sent our INIT. The side with the seq numbers that
1618 * are different will be the one that normnally
1619 * would have hit case C. This in effect "extends"
1620 * our vtags in this collision case to be 64 bits.
1621 * The same collision could occur aka you get both
1622 * vtag and seq number the same twice in a row.. but
1623 * is much less likely. If it did happen then we
1624 * would proceed through and bring up the assoc.. we
1625 * may end up with the wrong stream setup however..
1626 * which would be bad.. but there is no way to
1627 * tell.. until we send on a stream that does not
1630 if (how_indx < sizeof(asoc->cookie_how))
1631 asoc->cookie_how[how_indx] = 7;
1633 SCTP_TCB_UNLOCK(stcb);
1636 if (how_indx < sizeof(asoc->cookie_how))
1637 asoc->cookie_how[how_indx] = 8;
1638 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1639 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1640 sctp_stop_all_cookie_timers(stcb);
1642 * since we did not send a HB make sure we don't double
1645 net->hb_responded = 1;
1646 if (stcb->asoc.sctp_autoclose_ticks &&
1647 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1648 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1651 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1652 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1653 asoc->pre_open_streams = asoc->streamoutcnt;
1656 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1658 * Ok the peer probably discarded our data (if we
1659 * echoed a cookie+data). So anything on the
1660 * sent_queue should be marked for retransmit, we
1661 * may not get something to kick us so it COULD
1662 * still take a timeout to move these.. but it can't
1663 * hurt to mark them.
1666 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1667 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1668 chk->sent = SCTP_DATAGRAM_RESEND;
1669 sctp_flight_size_decrease(chk);
1670 sctp_total_flight_decrease(stcb, chk);
1671 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1676 /* process the INIT info (peer's info) */
1677 if (sctp_process_init(init_cp, stcb) < 0) {
1678 if (how_indx < sizeof(asoc->cookie_how))
1679 asoc->cookie_how[how_indx] = 9;
1680 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1681 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1682 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1683 src, dst, sh, op_err,
1688 if ((retval = sctp_load_addresses_from_init(stcb, m,
1689 init_offset + sizeof(struct sctp_init_chunk),
1690 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1691 if (how_indx < sizeof(asoc->cookie_how))
1692 asoc->cookie_how[how_indx] = 10;
1693 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1694 "Problem with address parameters");
1695 SCTPDBG(SCTP_DEBUG_INPUT1,
1696 "Load addresses from INIT causes an abort %d\n",
1698 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1699 src, dst, sh, op_err,
1704 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1705 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1706 *notification = SCTP_NOTIFY_ASSOC_UP;
1708 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1709 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1710 (!SCTP_IS_LISTENING(inp))) {
1711 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
1712 soisconnected(stcb->sctp_socket);
1714 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1715 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1717 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1718 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1719 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1720 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1722 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1724 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1725 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1726 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1727 stcb->sctp_ep, stcb, NULL);
1729 sctp_stop_all_cookie_timers(stcb);
1730 sctp_toss_old_cookies(stcb, asoc);
1731 sctp_send_cookie_ack(stcb);
1734 * only if we have retrans set do we do this. What
1735 * this call does is get only the COOKIE-ACK out and
1736 * then when we return the normal call to
1737 * sctp_chunk_output will get the retrans out behind
1740 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1742 if (how_indx < sizeof(asoc->cookie_how))
1743 asoc->cookie_how[how_indx] = 11;
1747 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1748 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1749 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1750 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1751 cookie->tie_tag_peer_vtag != 0) {
1752 struct sctpasochead *head;
1754 if (asoc->peer_supports_nat) {
1755 struct sctp_tcb *local_stcb;
1758 * This is a gross gross hack. Just call the
1759 * cookie_new code since we are allowing a duplicate
1760 * association. I hope this works...
1762 local_stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst,
1763 sh, cookie, cookie_len,
1764 inp, netp, init_src, notification,
1765 auth_skipped, auth_offset, auth_len,
1768 if (local_stcb == NULL) {
1769 SCTP_TCB_UNLOCK(stcb);
1771 return (local_stcb);
1774 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1777 if (how_indx < sizeof(asoc->cookie_how))
1778 asoc->cookie_how[how_indx] = 12;
1779 sctp_stop_association_timers(stcb, false);
1780 /* notify upper layer */
1781 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1782 atomic_add_int(&stcb->asoc.refcnt, 1);
1783 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1784 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1785 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1786 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1788 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1789 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1790 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1791 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1793 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1794 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1795 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1796 stcb->sctp_ep, stcb, NULL);
1798 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1799 /* move to OPEN state, if not in SHUTDOWN_SENT */
1800 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1802 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1803 asoc->pre_open_streams = asoc->streamoutcnt;
1805 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1806 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1807 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1808 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1809 asoc->str_reset_seq_in = asoc->init_seq_number;
1810 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1811 asoc->send_sack = 1;
1812 asoc->data_pkts_seen = 0;
1813 asoc->last_data_chunk_from = NULL;
1814 asoc->last_control_chunk_from = NULL;
1815 asoc->last_net_cmt_send_started = NULL;
1816 if (asoc->mapping_array) {
1817 memset(asoc->mapping_array, 0,
1818 asoc->mapping_array_size);
1820 if (asoc->nr_mapping_array) {
1821 memset(asoc->nr_mapping_array, 0,
1822 asoc->mapping_array_size);
1824 SCTP_TCB_UNLOCK(stcb);
1825 SCTP_INP_INFO_WLOCK();
1826 SCTP_INP_WLOCK(stcb->sctp_ep);
1827 SCTP_TCB_LOCK(stcb);
1828 atomic_add_int(&stcb->asoc.refcnt, -1);
1829 /* send up all the data */
1830 SCTP_TCB_SEND_LOCK(stcb);
1832 sctp_report_all_outbound(stcb, 0, SCTP_SO_LOCKED);
1833 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1834 stcb->asoc.strmout[i].chunks_on_queues = 0;
1835 #if defined(SCTP_DETAILED_STR_STATS)
1836 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1837 asoc->strmout[i].abandoned_sent[j] = 0;
1838 asoc->strmout[i].abandoned_unsent[j] = 0;
1841 asoc->strmout[i].abandoned_sent[0] = 0;
1842 asoc->strmout[i].abandoned_unsent[0] = 0;
1844 stcb->asoc.strmout[i].next_mid_ordered = 0;
1845 stcb->asoc.strmout[i].next_mid_unordered = 0;
1846 stcb->asoc.strmout[i].sid = i;
1847 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1849 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
1850 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
1851 SCTP_FREE(strrst, SCTP_M_STRESET);
1853 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
1854 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
1856 sctp_m_freem(sq->data);
1859 sctp_free_remote_addr(sq->whoFrom);
1862 sctp_free_a_readq(stcb, sq);
1864 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
1865 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
1867 sctp_m_freem(chk->data);
1870 if (chk->holds_key_ref)
1871 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1872 sctp_free_remote_addr(chk->whoTo);
1873 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1874 SCTP_DECR_CHK_COUNT();
1876 asoc->ctrl_queue_cnt = 0;
1877 asoc->str_reset = NULL;
1878 asoc->stream_reset_outstanding = 0;
1879 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
1880 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
1882 sctp_m_freem(chk->data);
1885 if (chk->holds_key_ref)
1886 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1887 sctp_free_remote_addr(chk->whoTo);
1888 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1889 SCTP_DECR_CHK_COUNT();
1891 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
1892 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
1893 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1895 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
1896 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
1897 if (aack->data != NULL) {
1898 sctp_m_freem(aack->data);
1900 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
1903 /* process the INIT-ACK info (my info) */
1904 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1905 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1907 /* pull from vtag hash */
1908 LIST_REMOVE(stcb, sctp_asocs);
1909 /* re-insert to new vtag position */
1910 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1911 SCTP_BASE_INFO(hashasocmark))];
1913 * put it in the bucket in the vtag hash of assoc's for the
1916 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1918 SCTP_TCB_SEND_UNLOCK(stcb);
1919 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1920 SCTP_INP_INFO_WUNLOCK();
1921 asoc->total_flight = 0;
1922 asoc->total_flight_count = 0;
1923 /* process the INIT info (peer's info) */
1924 if (sctp_process_init(init_cp, stcb) < 0) {
1925 if (how_indx < sizeof(asoc->cookie_how))
1926 asoc->cookie_how[how_indx] = 13;
1927 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1928 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1929 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1930 src, dst, sh, op_err,
1936 * since we did not send a HB make sure we don't double
1939 net->hb_responded = 1;
1941 if ((retval = sctp_load_addresses_from_init(stcb, m,
1942 init_offset + sizeof(struct sctp_init_chunk),
1943 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1944 if (how_indx < sizeof(asoc->cookie_how))
1945 asoc->cookie_how[how_indx] = 14;
1946 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1947 "Problem with address parameters");
1948 SCTPDBG(SCTP_DEBUG_INPUT1,
1949 "Load addresses from INIT causes an abort %d\n",
1951 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1952 src, dst, sh, op_err,
1957 /* respond with a COOKIE-ACK */
1958 sctp_send_cookie_ack(stcb);
1959 if (how_indx < sizeof(asoc->cookie_how))
1960 asoc->cookie_how[how_indx] = 15;
1961 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE) &&
1962 (asoc->sctp_autoclose_ticks > 0)) {
1963 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
1967 if (how_indx < sizeof(asoc->cookie_how))
1968 asoc->cookie_how[how_indx] = 16;
1969 /* all other cases... */
1970 SCTP_TCB_UNLOCK(stcb);
1975 * handle a state cookie for a new association m: input packet mbuf chain--
1976 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
1977 * and the cookie signature does not exist offset: offset into mbuf to the
1978 * cookie-echo chunk length: length of the cookie chunk to: where the init
1979 * was from returns a new TCB
1981 static struct sctp_tcb *
1982 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1983 struct sockaddr *src, struct sockaddr *dst,
1984 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1985 struct sctp_inpcb *inp, struct sctp_nets **netp,
1986 struct sockaddr *init_src, int *notification,
1987 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1988 uint8_t mflowtype, uint32_t mflowid,
1989 uint32_t vrf_id, uint16_t port)
1991 struct sctp_tcb *stcb;
1992 struct sctp_init_chunk *init_cp, init_buf;
1993 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1994 union sctp_sockstore store;
1995 struct sctp_association *asoc;
1996 int init_offset, initack_offset, initack_limit;
1999 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
2002 * find and validate the INIT chunk in the cookie (peer's info) the
2003 * INIT should start after the cookie-echo header struct (chunk
2004 * header, state cookie header struct)
2006 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2007 init_cp = (struct sctp_init_chunk *)
2008 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2009 (uint8_t *)&init_buf);
2010 if (init_cp == NULL) {
2011 /* could not pull a INIT chunk in cookie */
2012 SCTPDBG(SCTP_DEBUG_INPUT1,
2013 "process_cookie_new: could not pull INIT chunk hdr\n");
2016 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2017 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2020 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2022 * find and validate the INIT-ACK chunk in the cookie (my info) the
2023 * INIT-ACK follows the INIT chunk
2025 initack_cp = (struct sctp_init_ack_chunk *)
2026 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2027 (uint8_t *)&initack_buf);
2028 if (initack_cp == NULL) {
2029 /* could not pull INIT-ACK chunk in cookie */
2030 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2033 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2037 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2038 * "initack_limit" value. This is because the chk_length field
2039 * includes the length of the cookie, but the cookie is omitted when
2040 * the INIT and INIT_ACK are tacked onto the cookie...
2042 initack_limit = offset + cookie_len;
2045 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2050 * Here we do a trick, we set in NULL for the proc/thread argument.
2051 * We do this since in effect we only use the p argument when the
2052 * socket is unbound and we must do an implicit bind. Since we are
2053 * getting a cookie, we cannot be unbound.
2055 stcb = sctp_aloc_assoc(inp, init_src, &error,
2056 ntohl(initack_cp->init.initiate_tag),
2057 ntohl(initack_cp->init.initial_tsn), vrf_id,
2058 ntohs(initack_cp->init.num_outbound_streams),
2060 (struct thread *)NULL,
2061 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2063 struct mbuf *op_err;
2065 /* memory problem? */
2066 SCTPDBG(SCTP_DEBUG_INPUT1,
2067 "process_cookie_new: no room for another TCB!\n");
2068 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2069 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2070 src, dst, sh, op_err,
2076 /* get scope variables out of cookie */
2077 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2078 asoc->scope.site_scope = cookie->site_scope;
2079 asoc->scope.local_scope = cookie->local_scope;
2080 asoc->scope.loopback_scope = cookie->loopback_scope;
2082 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2083 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2084 struct mbuf *op_err;
2087 * Houston we have a problem. The EP changed while the
2088 * cookie was in flight. Only recourse is to abort the
2091 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2092 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2093 src, dst, sh, op_err,
2096 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2097 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2100 /* process the INIT-ACK info (my info) */
2101 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2103 /* process the INIT info (peer's info) */
2104 if (sctp_process_init(init_cp, stcb) < 0) {
2105 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2106 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2109 /* load all addresses */
2110 if ((retval = sctp_load_addresses_from_init(stcb, m,
2111 init_offset + sizeof(struct sctp_init_chunk),
2112 initack_offset, src, dst, init_src, port)) < 0) {
2113 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2114 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2118 * verify any preceding AUTH chunk that was skipped
2120 /* pull the local authentication parameters from the cookie/init-ack */
2121 sctp_auth_get_cookie_params(stcb, m,
2122 initack_offset + sizeof(struct sctp_init_ack_chunk),
2123 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2125 struct sctp_auth_chunk *auth;
2127 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2128 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2132 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2133 /* auth HMAC failed, dump the assoc and packet */
2134 SCTPDBG(SCTP_DEBUG_AUTH1,
2135 "COOKIE-ECHO: AUTH failed\n");
2136 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2137 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2140 /* remaining chunks checked... good to go */
2141 stcb->asoc.authenticated = 1;
2146 * if we're doing ASCONFs, check to see if we have any new local
2147 * addresses that need to get added to the peer (eg. addresses
2148 * changed while cookie echo in flight). This needs to be done
2149 * after we go to the OPEN state to do the correct asconf
2150 * processing. else, make sure we have the correct addresses in our
2154 /* warning, we re-use sin, sin6, sa_store here! */
2155 /* pull in local_address (our "from" address) */
2156 switch (cookie->laddr_type) {
2158 case SCTP_IPV4_ADDRESS:
2159 /* source addr is IPv4 */
2160 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2161 store.sin.sin_family = AF_INET;
2162 store.sin.sin_len = sizeof(struct sockaddr_in);
2163 store.sin.sin_addr.s_addr = cookie->laddress[0];
2167 case SCTP_IPV6_ADDRESS:
2168 /* source addr is IPv6 */
2169 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2170 store.sin6.sin6_family = AF_INET6;
2171 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2172 store.sin6.sin6_scope_id = cookie->scope_id;
2173 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2177 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2178 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2182 /* update current state */
2183 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2184 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2185 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2186 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2187 stcb->sctp_ep, stcb, NULL);
2189 sctp_stop_all_cookie_timers(stcb);
2190 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2191 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2193 /* set up to notify upper layer */
2194 *notification = SCTP_NOTIFY_ASSOC_UP;
2195 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2196 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2197 (!SCTP_IS_LISTENING(inp))) {
2199 * This is an endpoint that called connect() how it got a
2200 * cookie that is NEW is a bit of a mystery. It must be that
2201 * the INIT was sent, but before it got there.. a complete
2202 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2203 * should have went to the other code.. not here.. oh well..
2204 * a bit of protection is worth having..
2206 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2207 soisconnected(stcb->sctp_socket);
2208 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2209 (SCTP_IS_LISTENING(inp))) {
2211 * We don't want to do anything with this one. Since it is
2212 * the listening guy. The timer will get started for
2213 * accepted connections in the caller.
2217 if (stcb->asoc.sctp_autoclose_ticks &&
2218 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2219 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2221 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2222 *netp = sctp_findnet(stcb, init_src);
2223 if (*netp != NULL) {
2227 * Since we did not send a HB, make sure we don't double
2230 (*netp)->hb_responded = 1;
2231 /* Calculate the RTT. */
2232 old.tv_sec = cookie->time_entered.tv_sec;
2233 old.tv_usec = cookie->time_entered.tv_usec;
2234 sctp_calculate_rto(stcb, asoc, *netp, &old, SCTP_RTT_FROM_NON_DATA);
2236 /* respond with a COOKIE-ACK */
2237 sctp_send_cookie_ack(stcb);
2240 * check the address lists for any ASCONFs that need to be sent
2241 * AFTER the cookie-ack is sent
2243 sctp_check_address_list(stcb, m,
2244 initack_offset + sizeof(struct sctp_init_ack_chunk),
2245 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2246 &store.sa, cookie->local_scope, cookie->site_scope,
2247 cookie->ipv4_scope, cookie->loopback_scope);
2253 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2254 * we NEED to make sure we are not already using the vtag. If so we
2255 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2256 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2257 SCTP_BASE_INFO(hashasocmark))];
2258 LIST_FOREACH(stcb, head, sctp_asocs) {
2259 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2260 -- SEND ABORT - TRY AGAIN --
2266 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2267 * existing (non-NULL) TCB
2269 static struct mbuf *
2270 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2271 struct sockaddr *src, struct sockaddr *dst,
2272 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2273 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2274 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2275 struct sctp_tcb **locked_tcb,
2276 uint8_t mflowtype, uint32_t mflowid,
2277 uint32_t vrf_id, uint16_t port)
2279 struct sctp_state_cookie *cookie;
2280 struct sctp_tcb *l_stcb = *stcb;
2281 struct sctp_inpcb *l_inp;
2282 struct sockaddr *to;
2283 struct sctp_pcb *ep;
2285 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2287 uint8_t cookie_ok = 0;
2288 unsigned int sig_offset, cookie_offset;
2289 unsigned int cookie_len;
2291 struct timeval time_entered, time_expires;
2292 int notification = 0;
2293 struct sctp_nets *netl;
2294 int had_a_existing_tcb = 0;
2295 int send_int_conf = 0;
2297 struct sockaddr_in sin;
2300 struct sockaddr_in6 sin6;
2303 SCTPDBG(SCTP_DEBUG_INPUT2,
2304 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2306 if (inp_p == NULL) {
2309 cookie = &cp->cookie;
2310 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2311 cookie_len = ntohs(cp->ch.chunk_length);
2313 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2314 sizeof(struct sctp_init_chunk) +
2315 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2316 /* cookie too small */
2319 if ((cookie->peerport != sh->src_port) ||
2320 (cookie->myport != sh->dest_port) ||
2321 (cookie->my_vtag != sh->v_tag)) {
2323 * invalid ports or bad tag. Note that we always leave the
2324 * v_tag in the header in network order and when we stored
2325 * it in the my_vtag slot we also left it in network order.
2326 * This maintains the match even though it may be in the
2327 * opposite byte order of the machine :->
2332 * split off the signature into its own mbuf (since it should not be
2333 * calculated in the sctp_hmac_m() call).
2335 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2336 m_sig = m_split(m, sig_offset, M_NOWAIT);
2337 if (m_sig == NULL) {
2338 /* out of memory or ?? */
2341 #ifdef SCTP_MBUF_LOGGING
2342 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2343 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2348 * compute the signature/digest for the cookie
2350 ep = &(*inp_p)->sctp_ep;
2353 SCTP_TCB_UNLOCK(l_stcb);
2355 SCTP_INP_RLOCK(l_inp);
2357 SCTP_TCB_LOCK(l_stcb);
2359 /* which cookie is it? */
2360 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2361 (ep->current_secret_number != ep->last_secret_number)) {
2362 /* it's the old cookie */
2363 (void)sctp_hmac_m(SCTP_HMAC,
2364 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2365 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2367 /* it's the current cookie */
2368 (void)sctp_hmac_m(SCTP_HMAC,
2369 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2370 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2372 /* get the signature */
2373 SCTP_INP_RUNLOCK(l_inp);
2374 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2376 /* couldn't find signature */
2377 sctp_m_freem(m_sig);
2380 /* compare the received digest with the computed digest */
2381 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2382 /* try the old cookie? */
2383 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2384 (ep->current_secret_number != ep->last_secret_number)) {
2385 /* compute digest with old */
2386 (void)sctp_hmac_m(SCTP_HMAC,
2387 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2388 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2390 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2398 * Now before we continue we must reconstruct our mbuf so that
2399 * normal processing of any other chunks will work.
2405 while (SCTP_BUF_NEXT(m_at) != NULL) {
2406 m_at = SCTP_BUF_NEXT(m_at);
2408 SCTP_BUF_NEXT(m_at) = m_sig;
2411 if (cookie_ok == 0) {
2412 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2413 SCTPDBG(SCTP_DEBUG_INPUT2,
2414 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2415 (uint32_t)offset, cookie_offset, sig_offset);
2419 if (sctp_ticks_to_msecs(cookie->cookie_life) > SCTP_MAX_COOKIE_LIFE) {
2420 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid cookie lifetime\n");
2423 time_entered.tv_sec = cookie->time_entered.tv_sec;
2424 time_entered.tv_usec = cookie->time_entered.tv_usec;
2425 if ((time_entered.tv_sec < 0) ||
2426 (time_entered.tv_usec < 0) ||
2427 (time_entered.tv_usec >= 1000000)) {
2428 /* Invalid time stamp. Cookie must have been modified. */
2429 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid time stamp\n");
2432 (void)SCTP_GETTIME_TIMEVAL(&now);
2433 if (timevalcmp(&now, &time_entered, <)) {
2434 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie generated in the future!\n");
2438 * Check the cookie timestamps to be sure it's not stale.
2439 * cookie_life is in ticks, so we convert to seconds.
2441 time_expires.tv_sec = time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2442 time_expires.tv_usec = time_entered.tv_usec;
2443 if (timevalcmp(&now, &time_expires, >)) {
2444 /* cookie is stale! */
2445 struct mbuf *op_err;
2446 struct sctp_error_stale_cookie *cause;
2447 struct timeval diff;
2450 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2451 0, M_NOWAIT, 1, MT_DATA);
2452 if (op_err == NULL) {
2457 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2458 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2459 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2460 cause->cause.length = htons(sizeof(struct sctp_error_stale_cookie));
2462 timevalsub(&diff, &time_expires);
2463 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2464 staleness = UINT32_MAX;
2466 staleness = diff.tv_sec * 1000000;
2468 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2469 staleness += diff.tv_usec;
2471 staleness = UINT32_MAX;
2473 cause->stale_time = htonl(staleness);
2474 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2475 mflowtype, mflowid, l_inp->fibnum,
2480 * Now we must see with the lookup address if we have an existing
2481 * asoc. This will only happen if we were in the COOKIE-WAIT state
2482 * and a INIT collided with us and somewhere the peer sent the
2483 * cookie on another address besides the single address our assoc
2484 * had for him. In this case we will have one of the tie-tags set at
2485 * least AND the address field in the cookie can be used to look it
2489 switch (cookie->addr_type) {
2491 case SCTP_IPV6_ADDRESS:
2492 memset(&sin6, 0, sizeof(sin6));
2493 sin6.sin6_family = AF_INET6;
2494 sin6.sin6_len = sizeof(sin6);
2495 sin6.sin6_port = sh->src_port;
2496 sin6.sin6_scope_id = cookie->scope_id;
2497 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2498 sizeof(sin6.sin6_addr.s6_addr));
2499 to = (struct sockaddr *)&sin6;
2503 case SCTP_IPV4_ADDRESS:
2504 memset(&sin, 0, sizeof(sin));
2505 sin.sin_family = AF_INET;
2506 sin.sin_len = sizeof(sin);
2507 sin.sin_port = sh->src_port;
2508 sin.sin_addr.s_addr = cookie->address[0];
2509 to = (struct sockaddr *)&sin;
2513 /* This should not happen */
2516 if (*stcb == NULL) {
2517 /* Yep, lets check */
2518 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2519 if (*stcb == NULL) {
2521 * We should have only got back the same inp. If we
2522 * got back a different ep we have a problem. The
2523 * original findep got back l_inp and now
2525 if (l_inp != *inp_p) {
2526 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2529 if (*locked_tcb == NULL) {
2531 * In this case we found the assoc only
2532 * after we locked the create lock. This
2533 * means we are in a colliding case and we
2534 * must make sure that we unlock the tcb if
2535 * its one of the cases where we throw away
2536 * the incoming packets.
2538 *locked_tcb = *stcb;
2541 * We must also increment the inp ref count
2542 * since the ref_count flags was set when we
2543 * did not find the TCB, now we found it
2544 * which reduces the refcount.. we must
2545 * raise it back out to balance it all :-)
2547 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2548 if ((*stcb)->sctp_ep != l_inp) {
2549 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2550 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2556 cookie_len -= SCTP_SIGNATURE_SIZE;
2557 if (*stcb == NULL) {
2558 /* this is the "normal" case... get a new TCB */
2559 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2560 cookie, cookie_len, *inp_p,
2561 netp, to, ¬ification,
2562 auth_skipped, auth_offset, auth_len,
2566 /* this is abnormal... cookie-echo on existing TCB */
2567 had_a_existing_tcb = 1;
2568 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2570 cookie, cookie_len, *inp_p, *stcb, netp, to,
2571 ¬ification, auth_skipped, auth_offset, auth_len,
2574 if (*stcb == NULL) {
2579 if (*stcb == NULL) {
2580 /* still no TCB... must be bad cookie-echo */
2583 if (*netp != NULL) {
2584 (*netp)->flowtype = mflowtype;
2585 (*netp)->flowid = mflowid;
2588 * Ok, we built an association so confirm the address we sent the
2591 netl = sctp_findnet(*stcb, to);
2593 * This code should in theory NOT run but
2596 /* TSNH! Huh, why do I need to add this address here? */
2597 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2598 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2601 netl = sctp_findnet(*stcb, to);
2604 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2605 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2606 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2611 sctp_start_net_timers(*stcb);
2612 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2613 if (!had_a_existing_tcb ||
2614 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2616 * If we have a NEW cookie or the connect never
2617 * reached the connected state during collision we
2618 * must do the TCP accept thing.
2620 struct socket *so, *oso;
2621 struct sctp_inpcb *inp;
2623 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2625 * For a restart we will keep the same
2626 * socket, no need to do anything. I THINK!!
2628 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2629 if (send_int_conf) {
2630 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2631 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2635 oso = (*inp_p)->sctp_socket;
2636 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2637 SCTP_TCB_UNLOCK((*stcb));
2638 CURVNET_SET(oso->so_vnet);
2639 so = sonewconn(oso, 0
2642 SCTP_TCB_LOCK((*stcb));
2643 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2646 struct mbuf *op_err;
2648 /* Too many sockets */
2649 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2650 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2651 sctp_abort_association(*inp_p, NULL, m, iphlen,
2652 src, dst, sh, op_err,
2655 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2656 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2659 inp = (struct sctp_inpcb *)so->so_pcb;
2660 SCTP_INP_INCR_REF(inp);
2662 * We add the unbound flag here so that if we get an
2663 * soabort() before we get the move_pcb done, we
2664 * will properly cleanup.
2666 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2667 SCTP_PCB_FLAGS_CONNECTED |
2668 SCTP_PCB_FLAGS_IN_TCPPOOL |
2669 SCTP_PCB_FLAGS_UNBOUND |
2670 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2671 SCTP_PCB_FLAGS_DONT_WAKE);
2672 inp->sctp_features = (*inp_p)->sctp_features;
2673 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2674 inp->sctp_socket = so;
2675 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2676 inp->max_cwnd = (*inp_p)->max_cwnd;
2677 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2678 inp->ecn_supported = (*inp_p)->ecn_supported;
2679 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2680 inp->auth_supported = (*inp_p)->auth_supported;
2681 inp->asconf_supported = (*inp_p)->asconf_supported;
2682 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2683 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2684 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2685 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2686 inp->sctp_context = (*inp_p)->sctp_context;
2687 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2688 inp->fibnum = (*inp_p)->fibnum;
2689 inp->inp_starting_point_for_iterator = NULL;
2691 * copy in the authentication parameters from the
2694 if (inp->sctp_ep.local_hmacs)
2695 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2696 inp->sctp_ep.local_hmacs =
2697 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2698 if (inp->sctp_ep.local_auth_chunks)
2699 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2700 inp->sctp_ep.local_auth_chunks =
2701 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2704 * Now we must move it from one hash table to
2705 * another and get the tcb in the right place.
2709 * This is where the one-2-one socket is put into
2710 * the accept state waiting for the accept!
2713 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2715 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2717 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2718 SCTP_TCB_UNLOCK((*stcb));
2720 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2722 SCTP_TCB_LOCK((*stcb));
2723 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2726 * now we must check to see if we were aborted while
2727 * the move was going on and the lock/unlock
2730 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2732 * yep it was, we leave the assoc attached
2733 * to the socket since the sctp_inpcb_free()
2734 * call will send an abort for us.
2736 SCTP_INP_DECR_REF(inp);
2739 SCTP_INP_DECR_REF(inp);
2740 /* Switch over to the new guy */
2742 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2743 if (send_int_conf) {
2744 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2745 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2749 * Pull it from the incomplete queue and wake the
2757 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2759 if (send_int_conf) {
2760 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2761 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2767 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2768 struct sctp_tcb *stcb, struct sctp_nets *net)
2770 /* cp must not be used, others call this without a c-ack :-) */
2771 struct sctp_association *asoc;
2772 struct sctp_tmit_chunk *chk;
2774 SCTPDBG(SCTP_DEBUG_INPUT2,
2775 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2776 if ((stcb == NULL) || (net == NULL)) {
2781 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2782 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2783 asoc->overall_error_count,
2785 SCTP_FROM_SCTP_INPUT,
2788 asoc->overall_error_count = 0;
2789 sctp_stop_all_cookie_timers(stcb);
2790 /* process according to association state */
2791 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2792 /* state change only needed when I am in right state */
2793 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2794 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2795 sctp_start_net_timers(stcb);
2796 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2797 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2798 stcb->sctp_ep, stcb, NULL);
2801 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2802 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2803 if (asoc->overall_error_count == 0) {
2804 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2805 SCTP_RTT_FROM_NON_DATA);
2807 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2808 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2809 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2810 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2811 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2812 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2813 soisconnected(stcb->sctp_socket);
2817 * since we did not send a HB make sure we don't double
2820 net->hb_responded = 1;
2822 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2824 * We don't need to do the asconf thing, nor hb or
2825 * autoclose if the socket is closed.
2830 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2833 if (stcb->asoc.sctp_autoclose_ticks &&
2834 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2835 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2836 stcb->sctp_ep, stcb, NULL);
2839 * send ASCONF if parameters are pending and ASCONFs are
2840 * allowed (eg. addresses changed when init/cookie echo were
2843 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2844 (stcb->asoc.asconf_supported == 1) &&
2845 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2846 #ifdef SCTP_TIMER_BASED_ASCONF
2847 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2848 stcb->sctp_ep, stcb,
2849 stcb->asoc.primary_destination);
2851 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2852 SCTP_ADDR_NOT_LOCKED);
2857 /* Toss the cookie if I can */
2858 sctp_toss_old_cookies(stcb, asoc);
2859 /* Restart the timer if we have pending data */
2860 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2861 if (chk->whoTo != NULL) {
2866 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2871 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2872 struct sctp_tcb *stcb)
2874 struct sctp_nets *net;
2875 struct sctp_tmit_chunk *lchk;
2876 struct sctp_ecne_chunk bkup;
2877 uint8_t override_bit;
2878 uint32_t tsn, window_data_tsn;
2880 unsigned int pkt_cnt;
2882 len = ntohs(cp->ch.chunk_length);
2883 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2884 /* Its the old format */
2885 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2886 bkup.num_pkts_since_cwr = htonl(1);
2889 SCTP_STAT_INCR(sctps_recvecne);
2890 tsn = ntohl(cp->tsn);
2891 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2892 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2894 window_data_tsn = stcb->asoc.sending_seq - 1;
2896 window_data_tsn = lchk->rec.data.tsn;
2899 /* Find where it was sent to if possible. */
2901 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2902 if (lchk->rec.data.tsn == tsn) {
2904 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2907 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2913 * What to do. A previous send of a CWR was possibly lost.
2914 * See how old it is, we may have it marked on the actual
2917 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2918 if (tsn == net->last_cwr_tsn) {
2919 /* Found him, send it off */
2925 * If we reach here, we need to send a special CWR
2926 * that says hey, we did this a long time ago and
2927 * you lost the response.
2929 net = TAILQ_FIRST(&stcb->asoc.nets);
2934 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2941 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2942 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2944 * JRS - Use the congestion control given in the pluggable
2947 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2949 * We reduce once every RTT. So we will only lower cwnd at
2950 * the next sending seq i.e. the window_data_tsn
2952 net->cwr_window_tsn = window_data_tsn;
2953 net->ecn_ce_pkt_cnt += pkt_cnt;
2954 net->lost_cnt = pkt_cnt;
2955 net->last_cwr_tsn = tsn;
2957 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2958 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2959 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2961 * Another loss in the same window update how many
2962 * marks/packets lost we have had.
2966 if (pkt_cnt > net->lost_cnt) {
2967 /* Should be the case */
2968 cnt = (pkt_cnt - net->lost_cnt);
2969 net->ecn_ce_pkt_cnt += cnt;
2971 net->lost_cnt = pkt_cnt;
2972 net->last_cwr_tsn = tsn;
2974 * Most CC functions will ignore this call, since we
2975 * are in-window yet of the initial CE the peer saw.
2977 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2981 * We always send a CWR this way if our previous one was lost our
2982 * peer will get an update, or if it is not time again to reduce we
2983 * still get the cwr to the peer. Note we set the override when we
2984 * could not find the TSN on the chunk or the destination network.
2986 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2990 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2993 * Here we get a CWR from the peer. We must look in the outqueue and
2994 * make sure that we have a covered ECNE in the control chunk part.
2997 struct sctp_tmit_chunk *chk, *nchk;
2998 struct sctp_ecne_chunk *ecne;
3002 cwr_tsn = ntohl(cp->tsn);
3003 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3004 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
3005 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3008 if ((override == 0) && (chk->whoTo != net)) {
3009 /* Must be from the right src unless override is set */
3012 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3013 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3014 /* this covers this ECNE, we can remove it */
3015 stcb->asoc.ecn_echo_cnt_onq--;
3016 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3018 stcb->asoc.ctrl_queue_cnt--;
3019 sctp_m_freem(chk->data);
3021 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3022 if (override == 0) {
3030 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3031 struct sctp_tcb *stcb, struct sctp_nets *net)
3034 SCTPDBG(SCTP_DEBUG_INPUT2,
3035 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3039 /* process according to association state */
3040 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3041 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3042 SCTPDBG(SCTP_DEBUG_INPUT2,
3043 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3044 SCTP_TCB_UNLOCK(stcb);
3047 /* notify upper layer protocol */
3048 if (stcb->sctp_socket) {
3049 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3052 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3053 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3054 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3055 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3058 /* stop the timer */
3059 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3060 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3061 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3063 SCTPDBG(SCTP_DEBUG_INPUT2,
3064 "sctp_handle_shutdown_complete: calls free-asoc\n");
3065 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3066 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3071 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3072 struct sctp_nets *net, uint8_t flg)
3074 switch (desc->chunk_type) {
3077 /* find the tsn to resend (possibly) */
3080 struct sctp_tmit_chunk *tp1;
3082 tsn = ntohl(desc->tsn_ifany);
3083 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3084 if (tp1->rec.data.tsn == tsn) {
3088 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3096 * Do it the other way , aka without paying
3097 * attention to queue seq order.
3099 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3100 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3101 if (tp1->rec.data.tsn == tsn) {
3108 SCTP_STAT_INCR(sctps_pdrptsnnf);
3110 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3111 if (((flg & SCTP_BADCRC) == 0) &&
3112 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3115 if ((stcb->asoc.peers_rwnd == 0) &&
3116 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3117 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3120 if (stcb->asoc.peers_rwnd == 0 &&
3121 (flg & SCTP_FROM_MIDDLE_BOX)) {
3122 SCTP_STAT_INCR(sctps_pdrpdizrw);
3125 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3126 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3127 /* Payload not matching. */
3128 SCTP_STAT_INCR(sctps_pdrpbadd);
3131 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3132 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3133 /* Payload not matching. */
3134 SCTP_STAT_INCR(sctps_pdrpbadd);
3139 * this guy had a RTO calculation
3140 * pending on it, cancel it
3142 if (tp1->whoTo->rto_needed == 0) {
3143 tp1->whoTo->rto_needed = 1;
3147 SCTP_STAT_INCR(sctps_pdrpmark);
3148 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3149 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3151 * mark it as if we were doing a FR, since
3152 * we will be getting gap ack reports behind
3153 * the info from the router.
3155 tp1->rec.data.doing_fast_retransmit = 1;
3157 * mark the tsn with what sequences can
3160 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3161 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3163 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3166 /* restart the timer */
3167 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3169 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3170 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3173 /* fix counts and things */
3174 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3175 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3176 tp1->whoTo->flight_size,
3178 (uint32_t)(uintptr_t)stcb,
3181 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3182 sctp_flight_size_decrease(tp1);
3183 sctp_total_flight_decrease(stcb, tp1);
3185 tp1->sent = SCTP_DATAGRAM_RESEND;
3191 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3192 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3195 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3197 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3200 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3201 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3202 audit, stcb->asoc.sent_queue_retran_cnt);
3203 #ifndef SCTP_AUDITING_ENABLED
3204 stcb->asoc.sent_queue_retran_cnt = audit;
3212 struct sctp_tmit_chunk *asconf;
3214 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3216 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3221 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3222 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3223 asconf->sent = SCTP_DATAGRAM_RESEND;
3224 asconf->snd_count--;
3228 case SCTP_INITIATION:
3229 /* resend the INIT */
3230 stcb->asoc.dropped_special_cnt++;
3231 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3233 * If we can get it in, in a few attempts we do
3234 * this, otherwise we let the timer fire.
3236 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3238 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3239 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3242 case SCTP_SELECTIVE_ACK:
3243 case SCTP_NR_SELECTIVE_ACK:
3244 /* resend the sack */
3245 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3247 case SCTP_HEARTBEAT_REQUEST:
3248 /* resend a demand HB */
3249 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3251 * Only retransmit if we KNOW we wont destroy the
3254 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3258 sctp_send_shutdown(stcb, net);
3260 case SCTP_SHUTDOWN_ACK:
3261 sctp_send_shutdown_ack(stcb, net);
3263 case SCTP_COOKIE_ECHO:
3265 struct sctp_tmit_chunk *cookie;
3268 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3270 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3275 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3276 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3277 cookie->sent = SCTP_DATAGRAM_RESEND;
3278 sctp_stop_all_cookie_timers(stcb);
3282 case SCTP_COOKIE_ACK:
3283 sctp_send_cookie_ack(stcb);
3285 case SCTP_ASCONF_ACK:
3286 /* resend last asconf ack */
3287 sctp_send_asconf_ack(stcb);
3289 case SCTP_IFORWARD_CUM_TSN:
3290 case SCTP_FORWARD_CUM_TSN:
3291 send_forward_tsn(stcb, &stcb->asoc);
3293 /* can't do anything with these */
3294 case SCTP_PACKET_DROPPED:
3295 case SCTP_INITIATION_ACK: /* this should not happen */
3296 case SCTP_HEARTBEAT_ACK:
3297 case SCTP_ABORT_ASSOCIATION:
3298 case SCTP_OPERATION_ERROR:
3299 case SCTP_SHUTDOWN_COMPLETE:
3309 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3315 * We set things to 0xffffffff since this is the last delivered
3316 * sequence and we will be sending in 0 after the reset.
3319 if (number_entries) {
3320 for (i = 0; i < number_entries; i++) {
3321 temp = ntohs(list[i]);
3322 if (temp >= stcb->asoc.streamincnt) {
3325 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3329 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3330 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3333 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3337 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3342 if (number_entries > 0) {
3343 for (i = 0; i < number_entries; i++) {
3344 temp = ntohs(list[i]);
3345 if (temp >= stcb->asoc.streamoutcnt) {
3346 /* no such stream */
3349 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3350 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3353 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3354 stcb->asoc.strmout[i].next_mid_ordered = 0;
3355 stcb->asoc.strmout[i].next_mid_unordered = 0;
3358 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3362 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3367 if (number_entries > 0) {
3368 for (i = 0; i < number_entries; i++) {
3369 temp = ntohs(list[i]);
3370 if (temp >= stcb->asoc.streamoutcnt) {
3371 /* no such stream */
3374 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3377 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3378 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3383 struct sctp_stream_reset_request *
3384 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3386 struct sctp_association *asoc;
3387 struct sctp_chunkhdr *ch;
3388 struct sctp_stream_reset_request *r;
3389 struct sctp_tmit_chunk *chk;
3393 chk = asoc->str_reset;
3394 if (TAILQ_EMPTY(&asoc->control_send_queue) ||
3396 asoc->stream_reset_outstanding = 0;
3399 if (chk->data == NULL) {
3403 /* he wants a copy of the chk pointer */
3406 clen = chk->send_size;
3407 ch = mtod(chk->data, struct sctp_chunkhdr *);
3408 r = (struct sctp_stream_reset_request *)(ch + 1);
3409 if (ntohl(r->request_seq) == seq) {
3413 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3414 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3415 /* move to the next one, there can only be a max of two */
3416 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3417 if (ntohl(r->request_seq) == seq) {
3421 /* that seq is not here */
3426 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3428 struct sctp_association *asoc;
3429 struct sctp_tmit_chunk *chk;
3432 chk = asoc->str_reset;
3436 asoc->str_reset = NULL;
3437 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3438 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3439 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3440 asoc->ctrl_queue_cnt--;
3442 sctp_m_freem(chk->data);
3445 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3449 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3450 uint32_t seq, uint32_t action,
3451 struct sctp_stream_reset_response *respin)
3455 struct sctp_association *asoc = &stcb->asoc;
3456 struct sctp_tmit_chunk *chk;
3457 struct sctp_stream_reset_request *req_param;
3458 struct sctp_stream_reset_out_request *req_out_param;
3459 struct sctp_stream_reset_in_request *req_in_param;
3460 uint32_t number_entries;
3462 if (asoc->stream_reset_outstanding == 0) {
3466 if (seq == stcb->asoc.str_reset_seq_out) {
3467 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3468 if (req_param != NULL) {
3469 stcb->asoc.str_reset_seq_out++;
3470 type = ntohs(req_param->ph.param_type);
3471 lparam_len = ntohs(req_param->ph.param_length);
3472 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3475 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3476 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3477 asoc->stream_reset_out_is_outstanding = 0;
3478 if (asoc->stream_reset_outstanding)
3479 asoc->stream_reset_outstanding--;
3480 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3482 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3483 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3484 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3485 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3487 * Set it up so we don't stop
3490 asoc->stream_reset_outstanding++;
3491 stcb->asoc.str_reset_seq_out--;
3492 asoc->stream_reset_out_is_outstanding = 1;
3495 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3497 if (no_clear == 0) {
3498 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3500 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3501 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3502 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3503 if (asoc->stream_reset_outstanding)
3504 asoc->stream_reset_outstanding--;
3505 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3506 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3507 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3508 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3509 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3510 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3512 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3513 /* Ok we now may have more streams */
3516 num_stream = stcb->asoc.strm_pending_add_size;
3517 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3519 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3521 stcb->asoc.strm_pending_add_size = 0;
3522 if (asoc->stream_reset_outstanding)
3523 asoc->stream_reset_outstanding--;
3524 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3525 /* Put the new streams into effect */
3528 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3529 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3531 asoc->streamoutcnt += num_stream;
3532 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3533 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3534 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3535 SCTP_STREAM_CHANGE_DENIED);
3537 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3538 SCTP_STREAM_CHANGE_FAILED);
3540 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3541 if (asoc->stream_reset_outstanding)
3542 asoc->stream_reset_outstanding--;
3543 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3544 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3545 SCTP_STREAM_CHANGE_DENIED);
3546 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3547 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3548 SCTP_STREAM_CHANGE_FAILED);
3550 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3552 * a) Adopt the new in tsn.
3554 * c) Adopt the new out-tsn
3556 struct sctp_stream_reset_response_tsn *resp;
3557 struct sctp_forward_tsn_chunk fwdtsn;
3560 if (respin == NULL) {
3564 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3567 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3568 resp = (struct sctp_stream_reset_response_tsn *)respin;
3569 asoc->stream_reset_outstanding--;
3570 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3571 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3572 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3573 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3577 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3578 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3579 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3582 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3583 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3584 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3586 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3587 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3589 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3590 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3592 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3593 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3594 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3595 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3596 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3597 SCTP_ASSOC_RESET_DENIED);
3599 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3600 SCTP_ASSOC_RESET_FAILED);
3603 /* get rid of the request and get the request flags */
3604 if (asoc->stream_reset_outstanding == 0) {
3605 sctp_clean_up_stream_reset(stcb);
3609 if (asoc->stream_reset_outstanding == 0) {
3610 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3616 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3617 struct sctp_tmit_chunk *chk,
3618 struct sctp_stream_reset_in_request *req, int trunc)
3626 * peer wants me to send a str-reset to him for my outgoing seq's if
3629 struct sctp_association *asoc = &stcb->asoc;
3631 seq = ntohl(req->request_seq);
3632 if (asoc->str_reset_seq_in == seq) {
3633 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3634 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3635 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3637 /* Can't do it, since they exceeded our buffer size */
3638 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3639 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3640 len = ntohs(req->ph.param_length);
3641 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3642 if (number_entries) {
3643 for (i = 0; i < number_entries; i++) {
3644 temp = ntohs(req->list_of_streams[i]);
3645 if (temp >= stcb->asoc.streamoutcnt) {
3646 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3649 req->list_of_streams[i] = temp;
3651 for (i = 0; i < number_entries; i++) {
3652 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3653 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3658 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3659 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3660 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3663 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3665 /* Can't do it, since we have sent one out */
3666 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3669 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3670 asoc->str_reset_seq_in++;
3671 } else if (asoc->str_reset_seq_in - 1 == seq) {
3672 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3673 } else if (asoc->str_reset_seq_in - 2 == seq) {
3674 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3676 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3678 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3682 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3683 struct sctp_tmit_chunk *chk,
3684 struct sctp_stream_reset_tsn_request *req)
3686 /* reset all in and out and update the tsn */
3688 * A) reset my str-seq's on in and out. B) Select a receive next,
3689 * and set cum-ack to it. Also process this selected number as a
3690 * fwd-tsn as well. C) set in the response my next sending seq.
3692 struct sctp_forward_tsn_chunk fwdtsn;
3693 struct sctp_association *asoc = &stcb->asoc;
3697 seq = ntohl(req->request_seq);
3698 if (asoc->str_reset_seq_in == seq) {
3699 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3700 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3701 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3703 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3704 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3705 fwdtsn.ch.chunk_flags = 0;
3706 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3707 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3711 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3712 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3713 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3715 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3716 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3717 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3718 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3719 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3720 atomic_add_int(&asoc->sending_seq, 1);
3721 /* save off historical data for retrans */
3722 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3723 asoc->last_sending_seq[0] = asoc->sending_seq;
3724 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3725 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3726 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3727 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3728 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3729 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3731 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3732 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3733 asoc->str_reset_seq_in++;
3734 } else if (asoc->str_reset_seq_in - 1 == seq) {
3735 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3736 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3737 } else if (asoc->str_reset_seq_in - 2 == seq) {
3738 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3739 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3741 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3747 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3748 struct sctp_tmit_chunk *chk,
3749 struct sctp_stream_reset_out_request *req, int trunc)
3752 int number_entries, len;
3753 struct sctp_association *asoc = &stcb->asoc;
3755 seq = ntohl(req->request_seq);
3757 /* now if its not a duplicate we process it */
3758 if (asoc->str_reset_seq_in == seq) {
3759 len = ntohs(req->ph.param_length);
3760 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3762 * the sender is resetting, handle the list issue.. we must
3763 * a) verify if we can do the reset, if so no problem b) If
3764 * we can't do the reset we must copy the request. c) queue
3765 * it, and setup the data in processor to trigger it off
3766 * when needed and dequeue all the queued data.
3768 tsn = ntohl(req->send_reset_at_tsn);
3770 /* move the reset action back one */
3771 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3772 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3773 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3775 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3776 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3777 /* we can do it now */
3778 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3779 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3782 * we must queue it up and thus wait for the TSN's
3783 * to arrive that are at or before tsn
3785 struct sctp_stream_reset_list *liste;
3788 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3789 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3790 siz, SCTP_M_STRESET);
3791 if (liste == NULL) {
3792 /* gak out of memory */
3793 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3794 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3799 liste->number_entries = number_entries;
3800 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3801 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3802 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3804 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3805 asoc->str_reset_seq_in++;
3806 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3808 * one seq back, just echo back last action since my
3809 * response was lost.
3811 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3812 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3814 * two seq back, just echo back last action since my
3815 * response was lost.
3817 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3819 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3824 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3825 struct sctp_stream_reset_add_strm *str_add)
3828 * Peer is requesting to add more streams. If its within our
3829 * max-streams we will allow it.
3831 uint32_t num_stream, i;
3833 struct sctp_association *asoc = &stcb->asoc;
3834 struct sctp_queued_to_read *ctl, *nctl;
3836 /* Get the number. */
3837 seq = ntohl(str_add->request_seq);
3838 num_stream = ntohs(str_add->number_of_streams);
3839 /* Now what would be the new total? */
3840 if (asoc->str_reset_seq_in == seq) {
3841 num_stream += stcb->asoc.streamincnt;
3842 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3843 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3844 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3845 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3846 (num_stream > 0xffff)) {
3847 /* We must reject it they ask for to many */
3849 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3851 /* Ok, we can do that :-) */
3852 struct sctp_stream_in *oldstrm;
3854 /* save off the old */
3855 oldstrm = stcb->asoc.strmin;
3856 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3857 (num_stream * sizeof(struct sctp_stream_in)),
3859 if (stcb->asoc.strmin == NULL) {
3860 stcb->asoc.strmin = oldstrm;
3863 /* copy off the old data */
3864 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3865 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3866 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3867 stcb->asoc.strmin[i].sid = i;
3868 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3869 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3870 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3871 /* now anything on those queues? */
3872 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3873 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3874 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3876 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3877 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3878 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3881 /* Init the new streams */
3882 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3883 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3884 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3885 stcb->asoc.strmin[i].sid = i;
3886 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3887 stcb->asoc.strmin[i].pd_api_started = 0;
3888 stcb->asoc.strmin[i].delivery_started = 0;
3890 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3891 /* update the size */
3892 stcb->asoc.streamincnt = num_stream;
3893 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3894 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3896 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3897 asoc->str_reset_seq_in++;
3898 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3900 * one seq back, just echo back last action since my
3901 * response was lost.
3903 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3904 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3906 * two seq back, just echo back last action since my
3907 * response was lost.
3909 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3911 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3916 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3917 struct sctp_stream_reset_add_strm *str_add)
3920 * Peer is requesting to add more streams. If its within our
3921 * max-streams we will allow it.
3923 uint16_t num_stream;
3925 struct sctp_association *asoc = &stcb->asoc;
3927 /* Get the number. */
3928 seq = ntohl(str_add->request_seq);
3929 num_stream = ntohs(str_add->number_of_streams);
3930 /* Now what would be the new total? */
3931 if (asoc->str_reset_seq_in == seq) {
3932 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3933 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3934 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3935 } else if (stcb->asoc.stream_reset_outstanding) {
3936 /* We must reject it we have something pending */
3937 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3939 /* Ok, we can do that :-) */
3942 mychk = stcb->asoc.streamoutcnt;
3943 mychk += num_stream;
3944 if (mychk < 0x10000) {
3945 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3946 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3947 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3950 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3953 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3954 asoc->str_reset_seq_in++;
3955 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3957 * one seq back, just echo back last action since my
3958 * response was lost.
3960 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3961 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3963 * two seq back, just echo back last action since my
3964 * response was lost.
3966 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3968 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3973 __attribute__((noinline))
3976 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3977 struct sctp_chunkhdr *ch_req)
3979 uint16_t remaining_length, param_len, ptype;
3980 struct sctp_paramhdr pstore;
3981 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3985 struct sctp_tmit_chunk *chk;
3986 struct sctp_chunkhdr *ch;
3987 struct sctp_paramhdr *ph;
3991 /* now it may be a reset or a reset-response */
3992 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3994 /* setup for adding the response */
3995 sctp_alloc_a_chunk(stcb, chk);
3999 chk->copy_by_ref = 0;
4000 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4001 chk->rec.chunk_id.can_take_data = 0;
4003 chk->asoc = &stcb->asoc;
4004 chk->no_fr_allowed = 0;
4005 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4006 chk->book_size_scale = 0;
4007 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4008 if (chk->data == NULL) {
4011 sctp_m_freem(chk->data);
4014 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4017 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4019 /* setup chunk parameters */
4020 chk->sent = SCTP_DATAGRAM_UNSENT;
4024 ch = mtod(chk->data, struct sctp_chunkhdr *);
4025 ch->chunk_type = SCTP_STREAM_RESET;
4026 ch->chunk_flags = 0;
4027 ch->chunk_length = htons(chk->send_size);
4028 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4029 offset += sizeof(struct sctp_chunkhdr);
4030 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4031 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4036 param_len = ntohs(ph->param_length);
4037 if ((param_len > remaining_length) ||
4038 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4039 /* bad parameter length */
4042 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4043 (uint8_t *)&cstore);
4048 ptype = ntohs(ph->param_type);
4050 if (param_len > sizeof(cstore)) {
4055 if (num_param > SCTP_MAX_RESET_PARAMS) {
4056 /* hit the max of parameters already sorry.. */
4059 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4060 struct sctp_stream_reset_out_request *req_out;
4062 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4065 req_out = (struct sctp_stream_reset_out_request *)ph;
4067 if (stcb->asoc.stream_reset_outstanding) {
4068 seq = ntohl(req_out->response_seq);
4069 if (seq == stcb->asoc.str_reset_seq_out) {
4071 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4074 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4075 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4076 struct sctp_stream_reset_add_strm *str_add;
4078 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4081 str_add = (struct sctp_stream_reset_add_strm *)ph;
4083 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4084 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4085 struct sctp_stream_reset_add_strm *str_add;
4087 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4090 str_add = (struct sctp_stream_reset_add_strm *)ph;
4092 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4093 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4094 struct sctp_stream_reset_in_request *req_in;
4097 req_in = (struct sctp_stream_reset_in_request *)ph;
4098 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4099 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4100 struct sctp_stream_reset_tsn_request *req_tsn;
4103 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4104 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4106 goto strres_nochunk;
4110 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4111 struct sctp_stream_reset_response *resp;
4114 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4117 resp = (struct sctp_stream_reset_response *)ph;
4118 seq = ntohl(resp->response_seq);
4119 result = ntohl(resp->result);
4120 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4122 goto strres_nochunk;
4127 offset += SCTP_SIZE32(param_len);
4128 if (remaining_length >= SCTP_SIZE32(param_len)) {
4129 remaining_length -= SCTP_SIZE32(param_len);
4131 remaining_length = 0;
4135 /* we have no response free the stuff */
4136 goto strres_nochunk;
4138 /* ok we have a chunk to link in */
4139 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4142 stcb->asoc.ctrl_queue_cnt++;
4147 * Handle a router or endpoints report of a packet loss, there are two ways
4148 * to handle this, either we get the whole packet and must disect it
4149 * ourselves (possibly with truncation and or corruption) or it is a summary
4150 * from a middle box that did the disectting for us.
4153 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4154 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4156 struct sctp_chunk_desc desc;
4157 struct sctp_chunkhdr *chk_hdr;
4158 struct sctp_data_chunk *data_chunk;
4159 struct sctp_idata_chunk *idata_chunk;
4160 uint32_t bottle_bw, on_queue;
4161 uint32_t offset, chk_len;
4162 uint16_t pktdrp_len;
4163 uint8_t pktdrp_flags;
4165 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4166 ("PKTDROP chunk too small"));
4167 pktdrp_flags = cp->ch.chunk_flags;
4168 pktdrp_len = ntohs(cp->ch.chunk_length);
4169 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4170 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4171 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4172 /* The peer plays games with us. */
4176 limit -= sizeof(struct sctp_pktdrop_chunk);
4178 if (offset == limit) {
4179 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4180 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4182 } else if (offset + sizeof(struct sctphdr) > limit) {
4183 /* Only a partial SCTP common header. */
4184 SCTP_STAT_INCR(sctps_pdrpcrupt);
4187 /* XXX: Check embedded SCTP common header. */
4188 offset += sizeof(struct sctphdr);
4190 /* Now parse through the chunks themselves. */
4191 while (offset < limit) {
4192 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4193 SCTP_STAT_INCR(sctps_pdrpcrupt);
4196 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4197 desc.chunk_type = chk_hdr->chunk_type;
4198 /* get amount we need to move */
4199 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4200 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4201 /* Someone is lying... */
4204 if (desc.chunk_type == SCTP_DATA) {
4205 if (stcb->asoc.idata_supported) {
4206 /* Some is playing games with us. */
4209 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4210 /* Some is playing games with us. */
4213 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4215 * Not enough data bytes available in the
4218 SCTP_STAT_INCR(sctps_pdrpnedat);
4221 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4222 /* Not enough data in buffer. */
4225 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4226 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4227 desc.tsn_ifany = data_chunk->dp.tsn;
4228 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4229 SCTP_STAT_INCR(sctps_pdrpmbda);
4231 } else if (desc.chunk_type == SCTP_IDATA) {
4232 if (!stcb->asoc.idata_supported) {
4233 /* Some is playing games with us. */
4236 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4237 /* Some is playing games with us. */
4240 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4242 * Not enough data bytes available in the
4245 SCTP_STAT_INCR(sctps_pdrpnedat);
4248 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4249 /* Not enough data in buffer. */
4252 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4253 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4254 desc.tsn_ifany = idata_chunk->dp.tsn;
4255 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4256 SCTP_STAT_INCR(sctps_pdrpmbda);
4259 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4260 SCTP_STAT_INCR(sctps_pdrpmbct);
4263 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4264 SCTP_STAT_INCR(sctps_pdrppdbrk);
4268 offset += SCTP_SIZE32(chk_len);
4270 /* Now update any rwnd --- possibly */
4271 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4272 /* From a peer, we get a rwnd report */
4275 SCTP_STAT_INCR(sctps_pdrpfehos);
4277 bottle_bw = ntohl(cp->bottle_bw);
4278 on_queue = ntohl(cp->current_onq);
4279 if (bottle_bw && on_queue) {
4280 /* a rwnd report is in here */
4281 if (bottle_bw > on_queue)
4282 a_rwnd = bottle_bw - on_queue;
4287 stcb->asoc.peers_rwnd = 0;
4289 if (a_rwnd > stcb->asoc.total_flight) {
4290 stcb->asoc.peers_rwnd =
4291 a_rwnd - stcb->asoc.total_flight;
4293 stcb->asoc.peers_rwnd = 0;
4295 if (stcb->asoc.peers_rwnd <
4296 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4297 /* SWS sender side engages */
4298 stcb->asoc.peers_rwnd = 0;
4303 SCTP_STAT_INCR(sctps_pdrpfmbox);
4306 /* now middle boxes in sat networks get a cwnd bump */
4307 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4308 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4309 (stcb->asoc.sat_network)) {
4311 * This is debatable but for sat networks it makes sense
4312 * Note if a T3 timer has went off, we will prohibit any
4313 * changes to cwnd until we exit the t3 loss recovery.
4315 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4316 net, cp, &bottle_bw, &on_queue);
4321 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4322 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4323 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4324 * length of the complete packet outputs: - length: modified to remaining
4325 * length after control processing - netp: modified to new sctp_nets after
4326 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4327 * bad packet,...) otherwise return the tcb for this packet
4330 __attribute__((noinline))
4332 static struct sctp_tcb *
4333 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4334 struct sockaddr *src, struct sockaddr *dst,
4335 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4336 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4337 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4338 uint32_t vrf_id, uint16_t port)
4340 struct sctp_association *asoc;
4341 struct mbuf *op_err;
4342 char msg[SCTP_DIAG_INFO_LEN];
4344 int num_chunks = 0; /* number of control chunks processed */
4345 uint32_t chk_length, contiguous;
4347 int abort_no_unlock = 0;
4352 * How big should this be, and should it be alloc'd? Lets try the
4353 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4354 * until we get into jumbo grams and such..
4356 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4358 uint32_t auth_offset = 0, auth_len = 0;
4359 int auth_skipped = 0;
4362 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4363 iphlen, *offset, length, (void *)stcb);
4366 SCTP_TCB_LOCK_ASSERT(stcb);
4368 /* validate chunk header length... */
4369 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4370 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4371 ntohs(ch->chunk_length));
4376 * validate the verification tag
4378 vtag_in = ntohl(sh->v_tag);
4380 if (ch->chunk_type == SCTP_INITIATION) {
4381 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4382 ntohs(ch->chunk_length), vtag_in);
4384 /* protocol error- silently discard... */
4385 SCTP_STAT_INCR(sctps_badvtag);
4387 SCTP_TCB_UNLOCK(stcb);
4391 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4393 * If there is no stcb, skip the AUTH chunk and process
4394 * later after a stcb is found (to validate the lookup was
4397 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4399 (inp->auth_supported == 1)) {
4400 /* save this chunk for later processing */
4402 auth_offset = *offset;
4403 auth_len = ntohs(ch->chunk_length);
4405 /* (temporarily) move past this chunk */
4406 *offset += SCTP_SIZE32(auth_len);
4407 if (*offset >= length) {
4408 /* no more data left in the mbuf chain */
4412 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4413 sizeof(struct sctp_chunkhdr), chunk_buf);
4420 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4421 goto process_control_chunks;
4424 * first check if it's an ASCONF with an unknown src addr we
4425 * need to look inside to find the association
4427 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4428 struct sctp_chunkhdr *asconf_ch = ch;
4429 uint32_t asconf_offset = 0, asconf_len = 0;
4431 /* inp's refcount may be reduced */
4432 SCTP_INP_INCR_REF(inp);
4434 asconf_offset = *offset;
4436 asconf_len = ntohs(asconf_ch->chunk_length);
4437 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4439 stcb = sctp_findassociation_ep_asconf(m,
4442 sh, &inp, netp, vrf_id);
4445 asconf_offset += SCTP_SIZE32(asconf_len);
4446 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4447 sizeof(struct sctp_chunkhdr), chunk_buf);
4448 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4451 * reduce inp's refcount if not reduced in
4452 * sctp_findassociation_ep_asconf().
4454 SCTP_INP_DECR_REF(inp);
4457 /* now go back and verify any auth chunk to be sure */
4458 if (auth_skipped && (stcb != NULL)) {
4459 struct sctp_auth_chunk *auth;
4461 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4462 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4468 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4470 /* auth HMAC failed so dump it */
4474 /* remaining chunks are HMAC checked */
4475 stcb->asoc.authenticated = 1;
4480 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4481 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4483 /* no association, so it's out of the blue... */
4484 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4485 mflowtype, mflowid, inp->fibnum,
4491 /* ABORT and SHUTDOWN can use either v_tag... */
4492 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4493 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4494 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4495 /* Take the T-bit always into account. */
4496 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4497 (vtag_in == asoc->my_vtag)) ||
4498 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4499 (asoc->peer_vtag != htonl(0)) &&
4500 (vtag_in == asoc->peer_vtag))) {
4503 /* drop this packet... */
4504 SCTP_STAT_INCR(sctps_badvtag);
4506 SCTP_TCB_UNLOCK(stcb);
4511 /* for all other chunks, vtag must match */
4512 if (vtag_in != asoc->my_vtag) {
4513 /* invalid vtag... */
4514 SCTPDBG(SCTP_DEBUG_INPUT3,
4515 "invalid vtag: %xh, expect %xh\n",
4516 vtag_in, asoc->my_vtag);
4517 SCTP_STAT_INCR(sctps_badvtag);
4519 SCTP_TCB_UNLOCK(stcb);
4525 } /* end if !SCTP_COOKIE_ECHO */
4527 * process all control chunks...
4529 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4530 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4531 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4532 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4533 /* implied cookie-ack.. we must have lost the ack */
4534 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4538 process_control_chunks:
4539 while (IS_SCTP_CONTROL(ch)) {
4540 /* validate chunk length */
4541 chk_length = ntohs(ch->chunk_length);
4542 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4543 ch->chunk_type, chk_length);
4544 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4545 if (chk_length < sizeof(*ch) ||
4546 (*offset + (int)chk_length) > length) {
4550 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4552 * INIT and INIT-ACK only gets the init ack "header" portion
4553 * only because we don't have to process the peer's COOKIE.
4554 * All others get a complete chunk.
4556 switch (ch->chunk_type) {
4557 case SCTP_INITIATION:
4558 contiguous = sizeof(struct sctp_init_chunk);
4560 case SCTP_INITIATION_ACK:
4561 contiguous = sizeof(struct sctp_init_ack_chunk);
4564 contiguous = min(chk_length, sizeof(chunk_buf));
4567 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4576 /* Save off the last place we got a control from */
4578 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4580 * allow last_control to be NULL if
4581 * ASCONF... ASCONF processing will find the
4584 if ((netp != NULL) && (*netp != NULL))
4585 stcb->asoc.last_control_chunk_from = *netp;
4588 #ifdef SCTP_AUDITING_ENABLED
4589 sctp_audit_log(0xB0, ch->chunk_type);
4592 /* check to see if this chunk required auth, but isn't */
4593 if ((stcb != NULL) &&
4594 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4595 !stcb->asoc.authenticated) {
4596 /* "silently" ignore */
4597 SCTP_STAT_INCR(sctps_recvauthmissing);
4600 switch (ch->chunk_type) {
4601 case SCTP_INITIATION:
4602 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4603 /* The INIT chunk must be the only chunk. */
4604 if ((num_chunks > 1) ||
4605 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4607 * RFC 4960bis requires stopping the
4608 * processing of the packet.
4613 /* Honor our resource limit. */
4614 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4615 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4616 sctp_abort_association(inp, stcb, m, iphlen,
4617 src, dst, sh, op_err,
4623 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4624 (struct sctp_init_chunk *)ch, inp,
4625 stcb, *netp, &abort_no_unlock,
4629 if ((!abort_no_unlock) && (stcb != NULL)) {
4630 SCTP_TCB_UNLOCK(stcb);
4634 case SCTP_PAD_CHUNK:
4636 case SCTP_INITIATION_ACK:
4637 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4638 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4639 /* We are not interested anymore */
4640 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4645 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4646 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4651 /* The INIT-ACK chunk must be the only chunk. */
4652 if ((num_chunks > 1) ||
4653 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4657 if ((netp != NULL) && (*netp != NULL)) {
4658 ret = sctp_handle_init_ack(m, iphlen, *offset,
4660 (struct sctp_init_ack_chunk *)ch,
4669 if (abort_no_unlock) {
4673 * Special case, I must call the output routine to
4674 * get the cookie echoed
4676 if ((stcb != NULL) && (ret == 0)) {
4677 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4681 case SCTP_SELECTIVE_ACK:
4682 case SCTP_NR_SELECTIVE_ACK:
4685 uint32_t a_rwnd, cum_ack;
4686 uint16_t num_seg, num_nr_seg, num_dup;
4688 int offset_seg, offset_dup;
4690 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4691 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4692 SCTP_STAT_INCR(sctps_recvsacks);
4694 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4695 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4698 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4699 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4700 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4704 if (stcb->asoc.nrsack_supported == 0) {
4707 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4708 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4712 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4714 * If we have sent a shutdown-ack, we will pay no
4715 * attention to a sack sent in to us since
4716 * we don't care anymore.
4720 flags = ch->chunk_flags;
4721 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4722 struct sctp_sack_chunk *sack;
4724 sack = (struct sctp_sack_chunk *)ch;
4725 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4726 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4728 num_dup = ntohs(sack->sack.num_dup_tsns);
4729 a_rwnd = ntohl(sack->sack.a_rwnd);
4730 if (sizeof(struct sctp_sack_chunk) +
4731 num_seg * sizeof(struct sctp_gap_ack_block) +
4732 num_dup * sizeof(uint32_t) != chk_length) {
4733 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4736 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4737 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4739 struct sctp_nr_sack_chunk *nr_sack;
4741 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4742 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4743 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4744 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4745 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4746 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4747 if (sizeof(struct sctp_nr_sack_chunk) +
4748 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4749 num_dup * sizeof(uint32_t) != chk_length) {
4750 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4753 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4754 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4756 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4757 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4758 cum_ack, num_seg, a_rwnd);
4759 stcb->asoc.seen_a_sack_this_pkt = 1;
4760 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4761 (num_seg == 0) && (num_nr_seg == 0) &&
4762 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4763 (stcb->asoc.saw_sack_with_frags == 0) &&
4764 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4765 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4767 * We have a SIMPLE sack having no
4768 * prior segments and data on sent
4769 * queue to be acked. Use the faster
4770 * path sack processing. We also
4771 * allow window update sacks with no
4772 * missing segments to go this way
4775 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4776 &abort_now, ecne_seen);
4778 if ((netp != NULL) && (*netp != NULL)) {
4779 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4780 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4781 cum_ack, a_rwnd, ecne_seen);
4785 /* ABORT signal from sack processing */
4789 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4790 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4791 (stcb->asoc.stream_queue_cnt == 0)) {
4792 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4796 case SCTP_HEARTBEAT_REQUEST:
4797 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4798 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4799 SCTP_STAT_INCR(sctps_recvheartbeat);
4800 sctp_send_heartbeat_ack(stcb, m, *offset,
4804 case SCTP_HEARTBEAT_ACK:
4805 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4806 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4810 SCTP_STAT_INCR(sctps_recvheartbeatack);
4811 if ((netp != NULL) && (*netp != NULL)) {
4812 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4816 case SCTP_ABORT_ASSOCIATION:
4817 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4820 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4821 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4831 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4833 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4836 if ((netp != NULL) && (*netp != NULL)) {
4838 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4839 stcb, *netp, &abort_flag);
4846 case SCTP_SHUTDOWN_ACK:
4847 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4848 if ((chk_length == sizeof(struct sctp_shutdown_ack_chunk)) &&
4849 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4850 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4855 case SCTP_OPERATION_ERROR:
4856 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4857 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4858 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4863 case SCTP_COOKIE_ECHO:
4864 SCTPDBG(SCTP_DEBUG_INPUT3,
4865 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4866 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4869 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4870 /* We are not interested anymore */
4873 SCTP_TCB_UNLOCK(stcb);
4880 * First are we accepting? We do this again here
4881 * since it is possible that a previous endpoint WAS
4882 * listening responded to a INIT-ACK and then
4883 * closed. We opened and bound.. and are now no
4886 * XXXGL: notes on checking listen queue length.
4887 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4888 * SOLISTENING(), because a listening "UDP type"
4889 * socket isn't listening in terms of the socket
4890 * layer. It is a normal data flow socket, that
4891 * can fork off new connections. Thus, we should
4892 * look into sol_qlen only in case we are !UDP.
4893 * 2) Checking sol_qlen in general requires locking
4894 * the socket, and this code lacks that.
4896 if ((stcb == NULL) &&
4897 (!SCTP_IS_LISTENING(inp) ||
4898 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
4899 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4900 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4901 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4902 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4903 sctp_abort_association(inp, stcb, m, iphlen,
4904 src, dst, sh, op_err,
4911 struct mbuf *ret_buf;
4912 struct sctp_inpcb *linp;
4913 struct sctp_tmit_chunk *chk;
4922 SCTP_ASOC_CREATE_LOCK(linp);
4923 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
4924 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4925 SCTP_ASOC_CREATE_UNLOCK(linp);
4931 struct sctp_tcb *locked_stcb;
4935 sctp_handle_cookie_echo(m, iphlen,
4939 (struct sctp_cookie_echo_chunk *)ch,
4949 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4950 SCTP_TCB_UNLOCK(locked_stcb);
4953 SCTP_TCB_LOCK_ASSERT(stcb);
4959 SCTP_ASOC_CREATE_UNLOCK(linp);
4961 if (ret_buf == NULL) {
4963 SCTP_TCB_UNLOCK(stcb);
4965 SCTPDBG(SCTP_DEBUG_INPUT3,
4966 "GAK, null buffer\n");
4970 /* if AUTH skipped, see if it verified... */
4975 /* Restart the timer if we have pending data */
4976 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4977 if (chk->whoTo != NULL) {
4982 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4986 case SCTP_COOKIE_ACK:
4987 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4988 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4991 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4992 /* We are not interested anymore */
4993 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4996 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4997 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
5002 if ((netp != NULL) && (*netp != NULL)) {
5003 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5007 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
5011 if (stcb->asoc.ecn_supported == 0) {
5014 if ((chk_length != sizeof(struct sctp_ecne_chunk)) &&
5015 (chk_length != sizeof(struct old_sctp_ecne_chunk))) {
5018 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5022 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5026 if (stcb->asoc.ecn_supported == 0) {
5029 if (chk_length != sizeof(struct sctp_cwr_chunk)) {
5032 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5034 case SCTP_SHUTDOWN_COMPLETE:
5035 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5036 /* must be first and only chunk */
5037 if ((num_chunks > 1) ||
5038 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5042 if ((chk_length == sizeof(struct sctp_shutdown_complete_chunk)) &&
5043 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5044 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5051 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5053 if (stcb->asoc.asconf_supported == 0) {
5056 sctp_handle_asconf(m, *offset, src,
5057 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5061 case SCTP_ASCONF_ACK:
5062 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5066 if (stcb->asoc.asconf_supported == 0) {
5069 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5072 if ((netp != NULL) && (*netp != NULL)) {
5073 /* He's alive so give him credit */
5074 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5075 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5076 stcb->asoc.overall_error_count,
5078 SCTP_FROM_SCTP_INPUT,
5081 stcb->asoc.overall_error_count = 0;
5082 sctp_handle_asconf_ack(m, *offset,
5083 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5084 if (abort_no_unlock)
5088 case SCTP_FORWARD_CUM_TSN:
5089 case SCTP_IFORWARD_CUM_TSN:
5090 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5091 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5095 if (stcb->asoc.prsctp_supported == 0) {
5098 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5101 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5102 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5103 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5104 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5106 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5108 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5109 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
5114 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5115 /* We are not interested anymore */
5116 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5117 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5122 * For sending a SACK this looks like DATA chunks.
5124 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5126 sctp_handle_forward_tsn(stcb,
5127 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5133 case SCTP_STREAM_RESET:
5134 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5138 if (stcb->asoc.reconfig_supported == 0) {
5141 if (chk_length < sizeof(struct sctp_stream_reset_tsn_req)) {
5144 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5145 /* stop processing */
5150 case SCTP_PACKET_DROPPED:
5151 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5155 if (stcb->asoc.pktdrop_supported == 0) {
5158 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5161 if ((netp != NULL) && (*netp != NULL)) {
5162 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5164 min(chk_length, contiguous));
5167 case SCTP_AUTHENTICATION:
5168 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5170 /* save the first AUTH for later processing */
5171 if (auth_skipped == 0) {
5172 auth_offset = *offset;
5173 auth_len = chk_length;
5176 /* skip this chunk (temporarily) */
5179 if (stcb->asoc.auth_supported == 0) {
5182 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5183 (chk_length > (sizeof(struct sctp_auth_chunk) +
5184 SCTP_AUTH_DIGEST_LEN_MAX))) {
5189 if (got_auth == 1) {
5190 /* skip this chunk... it's already auth'd */
5194 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5195 /* auth HMAC failed so dump the packet */
5199 /* remaining chunks are HMAC checked */
5200 stcb->asoc.authenticated = 1;
5206 /* it's an unknown chunk! */
5207 if ((ch->chunk_type & 0x40) &&
5209 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5210 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5211 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5212 struct sctp_gen_error_cause *cause;
5215 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5216 0, M_NOWAIT, 1, MT_DATA);
5217 if (op_err != NULL) {
5218 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5219 cause = mtod(op_err, struct sctp_gen_error_cause *);
5220 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5221 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5222 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5223 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5224 if (SCTP_BUF_NEXT(op_err) != NULL) {
5225 #ifdef SCTP_MBUF_LOGGING
5226 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5227 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5230 sctp_queue_op_err(stcb, op_err);
5232 sctp_m_freem(op_err);
5236 if ((ch->chunk_type & 0x80) == 0) {
5237 /* discard this packet */
5240 } /* else skip this bad chunk and continue... */
5242 } /* switch (ch->chunk_type) */
5245 /* get the next chunk */
5246 *offset += SCTP_SIZE32(chk_length);
5247 if (*offset >= length) {
5248 /* no more data left in the mbuf chain */
5251 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5252 sizeof(struct sctp_chunkhdr), chunk_buf);
5259 if ((asconf_cnt > 0) && (stcb != NULL)) {
5260 sctp_send_asconf_ack(stcb);
5266 * common input chunk processing (v4 and v6)
5269 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5270 struct sockaddr *src, struct sockaddr *dst,
5271 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5272 uint8_t compute_crc,
5274 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5275 uint32_t vrf_id, uint16_t port)
5278 int fwd_tsn_seen = 0, data_processed = 0;
5279 struct mbuf *m = *mm, *op_err;
5280 char msg[SCTP_DIAG_INFO_LEN];
5282 int cnt_ctrl_ready = 0;
5283 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5284 struct sctp_tcb *stcb = NULL;
5285 struct sctp_nets *net = NULL;
5287 SCTP_STAT_INCR(sctps_recvdatagrams);
5288 #ifdef SCTP_AUDITING_ENABLED
5289 sctp_audit_log(0xE0, 1);
5290 sctp_auditing(0, inp, stcb, net);
5292 if (compute_crc != 0) {
5293 uint32_t check, calc_check;
5295 check = sh->checksum;
5297 calc_check = sctp_calculate_cksum(m, iphlen);
5298 sh->checksum = check;
5299 if (calc_check != check) {
5300 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5301 calc_check, check, (void *)m, length, iphlen);
5302 stcb = sctp_findassociation_addr(m, offset, src, dst,
5303 sh, ch, &inp, &net, vrf_id);
5304 #if defined(INET) || defined(INET6)
5305 if ((ch->chunk_type != SCTP_INITIATION) &&
5306 (net != NULL) && (net->port != port)) {
5307 if (net->port == 0) {
5308 /* UDP encapsulation turned on. */
5309 net->mtu -= sizeof(struct udphdr);
5310 if (stcb->asoc.smallest_mtu > net->mtu) {
5311 sctp_pathmtu_adjustment(stcb, net->mtu);
5313 } else if (port == 0) {
5314 /* UDP encapsulation turned off. */
5315 net->mtu += sizeof(struct udphdr);
5316 /* XXX Update smallest_mtu */
5322 net->flowtype = mflowtype;
5323 net->flowid = mflowid;
5325 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5326 if ((inp != NULL) && (stcb != NULL)) {
5327 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5328 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5329 } else if ((inp != NULL) && (stcb == NULL)) {
5332 SCTP_STAT_INCR(sctps_badsum);
5333 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5337 /* Destination port of 0 is illegal, based on RFC4960. */
5338 if (sh->dest_port == 0) {
5339 SCTP_STAT_INCR(sctps_hdrops);
5342 stcb = sctp_findassociation_addr(m, offset, src, dst,
5343 sh, ch, &inp, &net, vrf_id);
5344 #if defined(INET) || defined(INET6)
5345 if ((ch->chunk_type != SCTP_INITIATION) &&
5346 (net != NULL) && (net->port != port)) {
5347 if (net->port == 0) {
5348 /* UDP encapsulation turned on. */
5349 net->mtu -= sizeof(struct udphdr);
5350 if (stcb->asoc.smallest_mtu > net->mtu) {
5351 sctp_pathmtu_adjustment(stcb, net->mtu);
5353 } else if (port == 0) {
5354 /* UDP encapsulation turned off. */
5355 net->mtu += sizeof(struct udphdr);
5356 /* XXX Update smallest_mtu */
5362 net->flowtype = mflowtype;
5363 net->flowid = mflowid;
5366 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5367 SCTP_STAT_INCR(sctps_noport);
5368 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5371 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5372 sctp_send_shutdown_complete2(src, dst, sh,
5373 mflowtype, mflowid, fibnum,
5377 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5380 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5381 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5382 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5383 (ch->chunk_type != SCTP_INIT))) {
5384 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5386 sctp_send_abort(m, iphlen, src, dst,
5388 mflowtype, mflowid, fibnum,
5393 } else if (stcb == NULL) {
5396 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5397 (void *)m, iphlen, offset, length, (void *)stcb);
5399 /* always clear this before beginning a packet */
5400 stcb->asoc.authenticated = 0;
5401 stcb->asoc.seen_a_sack_this_pkt = 0;
5402 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5403 (void *)stcb, stcb->asoc.state);
5405 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5406 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5408 * If we hit here, we had a ref count
5409 * up when the assoc was aborted and the
5410 * timer is clearing out the assoc, we should
5411 * NOT respond to any packet.. its OOTB.
5413 SCTP_TCB_UNLOCK(stcb);
5415 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5416 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5417 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5419 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5420 mflowtype, mflowid, inp->fibnum,
5425 if (IS_SCTP_CONTROL(ch)) {
5426 /* process the control portion of the SCTP packet */
5427 /* sa_ignore NO_NULL_CHK */
5428 stcb = sctp_process_control(m, iphlen, &offset, length,
5430 inp, stcb, &net, &fwd_tsn_seen,
5431 mflowtype, mflowid, fibnum,
5435 * This covers us if the cookie-echo was there and
5436 * it changes our INP.
5438 inp = stcb->sctp_ep;
5439 #if defined(INET) || defined(INET6)
5440 if ((ch->chunk_type != SCTP_INITIATION) &&
5441 (net != NULL) && (net->port != port)) {
5442 if (net->port == 0) {
5443 /* UDP encapsulation turned on. */
5444 net->mtu -= sizeof(struct udphdr);
5445 if (stcb->asoc.smallest_mtu > net->mtu) {
5446 sctp_pathmtu_adjustment(stcb, net->mtu);
5448 } else if (port == 0) {
5449 /* UDP encapsulation turned off. */
5450 net->mtu += sizeof(struct udphdr);
5451 /* XXX Update smallest_mtu */
5459 * no control chunks, so pre-process DATA chunks (these
5460 * checks are taken care of by control processing)
5464 * if DATA only packet, and auth is required, then punt...
5465 * can't have authenticated without any AUTH (control)
5468 if ((stcb != NULL) &&
5469 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5470 /* "silently" ignore */
5471 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5472 SCTP_STAT_INCR(sctps_recvauthmissing);
5476 /* out of the blue DATA chunk */
5477 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5478 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5479 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5481 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5482 mflowtype, mflowid, fibnum,
5486 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5487 /* v_tag mismatch! */
5488 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5489 SCTP_STAT_INCR(sctps_badvtag);
5494 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5497 * no valid TCB for this packet, or we found it's a bad
5498 * packet while processing control, or we're done with this
5499 * packet (done or skip rest of data), so we drop it...
5505 * DATA chunk processing
5507 /* plow through the data chunks while length > offset */
5510 * Rest should be DATA only. Check authentication state if AUTH for
5513 if ((length > offset) &&
5515 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5516 !stcb->asoc.authenticated) {
5517 /* "silently" ignore */
5518 SCTP_STAT_INCR(sctps_recvauthmissing);
5519 SCTPDBG(SCTP_DEBUG_AUTH1,
5520 "Data chunk requires AUTH, skipped\n");
5523 if (length > offset) {
5527 * First check to make sure our state is correct. We would
5528 * not get here unless we really did have a tag, so we don't
5529 * abort if this happens, just dump the chunk silently.
5531 switch (SCTP_GET_STATE(stcb)) {
5532 case SCTP_STATE_COOKIE_ECHOED:
5534 * we consider data with valid tags in this state
5535 * shows us the cookie-ack was lost. Imply it was
5538 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5540 case SCTP_STATE_COOKIE_WAIT:
5542 * We consider OOTB any data sent during asoc setup.
5544 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5545 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5547 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5548 mflowtype, mflowid, inp->fibnum,
5551 /* sa_ignore NOTREACHED */
5553 case SCTP_STATE_EMPTY: /* should not happen */
5554 case SCTP_STATE_INUSE: /* should not happen */
5555 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5556 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5559 /* sa_ignore NOTREACHED */
5561 case SCTP_STATE_OPEN:
5562 case SCTP_STATE_SHUTDOWN_SENT:
5565 /* plow through the data chunks while length > offset */
5566 retval = sctp_process_data(mm, iphlen, &offset, length,
5567 inp, stcb, net, &high_tsn);
5570 * The association aborted, NO UNLOCK needed since
5571 * the association is destroyed.
5580 * Anything important needs to have been m_copy'ed in
5585 /* take care of ecn */
5586 if ((data_processed == 1) &&
5587 (stcb->asoc.ecn_supported == 1) &&
5588 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5589 /* Yep, we need to add a ECNE */
5590 sctp_send_ecn_echo(stcb, net, high_tsn);
5593 if ((data_processed == 0) && (fwd_tsn_seen)) {
5595 uint32_t highest_tsn;
5597 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5598 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5600 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5602 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5603 stcb->asoc.send_sack = 1;
5604 sctp_sack_check(stcb, was_a_gap);
5605 } else if (fwd_tsn_seen) {
5606 stcb->asoc.send_sack = 1;
5608 /* trigger send of any chunks in queue... */
5610 #ifdef SCTP_AUDITING_ENABLED
5611 sctp_audit_log(0xE0, 2);
5612 sctp_auditing(1, inp, stcb, net);
5614 SCTPDBG(SCTP_DEBUG_INPUT1,
5615 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5616 stcb->asoc.peers_rwnd,
5617 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5618 stcb->asoc.total_flight);
5619 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5620 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5621 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5623 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5625 stcb->asoc.trigger_reset ||
5627 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5628 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5629 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5630 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5632 #ifdef SCTP_AUDITING_ENABLED
5633 sctp_audit_log(0xE0, 3);
5634 sctp_auditing(2, inp, stcb, net);
5638 SCTP_TCB_UNLOCK(stcb);
5640 if (inp_decr != NULL) {
5641 /* reduce ref-count */
5642 SCTP_INP_WLOCK(inp_decr);
5643 SCTP_INP_DECR_REF(inp_decr);
5644 SCTP_INP_WUNLOCK(inp_decr);
5651 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5655 uint32_t vrf_id = 0;
5657 struct sockaddr_in src, dst;
5660 struct sctp_chunkhdr *ch;
5662 uint8_t compute_crc;
5668 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5669 SCTP_RELEASE_PKT(i_pak);
5672 m = SCTP_HEADER_TO_CHAIN(i_pak);
5673 #ifdef SCTP_MBUF_LOGGING
5674 /* Log in any input mbufs */
5675 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5676 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5679 #ifdef SCTP_PACKET_LOGGING
5680 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5684 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5685 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5687 if_name(m->m_pkthdr.rcvif),
5688 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5689 mflowid = m->m_pkthdr.flowid;
5690 mflowtype = M_HASHTYPE_GET(m);
5691 fibnum = M_GETFIB(m);
5692 SCTP_STAT_INCR(sctps_recvpackets);
5693 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5694 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5695 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5696 if (SCTP_BUF_LEN(m) < offset) {
5697 if ((m = m_pullup(m, offset)) == NULL) {
5698 SCTP_STAT_INCR(sctps_hdrops);
5702 ip = mtod(m, struct ip *);
5703 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5704 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5705 offset -= sizeof(struct sctp_chunkhdr);
5706 memset(&src, 0, sizeof(struct sockaddr_in));
5707 src.sin_family = AF_INET;
5708 src.sin_len = sizeof(struct sockaddr_in);
5709 src.sin_port = sh->src_port;
5710 src.sin_addr = ip->ip_src;
5711 memset(&dst, 0, sizeof(struct sockaddr_in));
5712 dst.sin_family = AF_INET;
5713 dst.sin_len = sizeof(struct sockaddr_in);
5714 dst.sin_port = sh->dest_port;
5715 dst.sin_addr = ip->ip_dst;
5716 length = ntohs(ip->ip_len);
5717 /* Validate mbuf chain length with IP payload length. */
5718 if (SCTP_HEADER_LEN(m) != length) {
5719 SCTPDBG(SCTP_DEBUG_INPUT1,
5720 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5721 SCTP_STAT_INCR(sctps_hdrops);
5724 /* SCTP does not allow broadcasts or multicasts */
5725 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5728 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5731 ecn_bits = ip->ip_tos;
5732 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5733 SCTP_STAT_INCR(sctps_recvhwcrc);
5736 SCTP_STAT_INCR(sctps_recvswcrc);
5739 sctp_common_input_processing(&m, iphlen, offset, length,
5740 (struct sockaddr *)&src,
5741 (struct sockaddr *)&dst,
5745 mflowtype, mflowid, fibnum,
5754 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5755 extern int *sctp_cpuarry;
5759 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5766 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5772 uint32_t flowid, tag;
5774 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5775 flowid = m->m_pkthdr.flowid;
5778 * No flow id built by lower layers fix it so we
5781 offset = off + sizeof(struct sctphdr);
5782 if (SCTP_BUF_LEN(m) < offset) {
5783 if ((m = m_pullup(m, offset)) == NULL) {
5784 SCTP_STAT_INCR(sctps_hdrops);
5785 return (IPPROTO_DONE);
5788 ip = mtod(m, struct ip *);
5789 sh = (struct sctphdr *)((caddr_t)ip + off);
5790 tag = htonl(sh->v_tag);
5791 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5792 m->m_pkthdr.flowid = flowid;
5793 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5795 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5796 sctp_queue_to_mcore(m, off, cpu_to_use);
5797 return (IPPROTO_DONE);
5800 sctp_input_with_port(m, off, 0);
5801 return (IPPROTO_DONE);