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 length */
102 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
103 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
104 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
108 *abort_no_unlock = 1;
111 /* validate parameters */
113 if (init->initiate_tag == 0) {
114 /* protocol error... send abort */
115 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
116 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
120 *abort_no_unlock = 1;
123 if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
124 /* invalid parameter... send abort */
125 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
126 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
130 *abort_no_unlock = 1;
133 if (init->num_inbound_streams == 0) {
134 /* protocol error... send abort */
135 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
136 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
140 *abort_no_unlock = 1;
143 if (init->num_outbound_streams == 0) {
144 /* protocol error... send abort */
145 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
146 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
150 *abort_no_unlock = 1;
153 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
154 offset + ntohs(cp->ch.chunk_length))) {
155 /* auth parameter(s) error... send abort */
156 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
157 "Problem with AUTH parameters");
158 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
162 *abort_no_unlock = 1;
165 /* We are only accepting if we have a listening socket. */
166 if ((stcb == NULL) &&
167 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
168 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
169 (!SCTP_IS_LISTENING(inp)))) {
171 * FIX ME ?? What about TCP model and we have a
172 * match/restart case? Actually no fix is needed. the lookup
173 * will always find the existing assoc so stcb would not be
174 * NULL. It may be questionable to do this since we COULD
175 * just send back the INIT-ACK and hope that the app did
176 * accept()'s by the time the COOKIE was sent. But there is
177 * a price to pay for COOKIE generation and I don't want to
178 * pay it on the chance that the app will actually do some
179 * accepts(). The App just looses and should NOT be in this
182 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
183 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
185 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
186 mflowtype, mflowid, inp->fibnum,
191 if ((stcb != NULL) &&
192 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
193 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
194 sctp_send_shutdown_ack(stcb, NULL);
195 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
197 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
198 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
205 SCTP_INP_RUNLOCK(inp);
210 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
214 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked)
218 struct sctp_stream_queue_pending *sp;
219 struct sctp_association *asoc;
222 * This function returns if any stream has true unsent data on it.
223 * Note that as it looks through it will clean up any places that
224 * have old data that has been sent but left at top of stream queue.
228 SCTP_TCB_SEND_LOCK(stcb);
229 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
230 /* Check to see if some data queued */
231 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
232 /* sa_ignore FREED_MEMORY */
233 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
237 if ((sp->msg_is_complete) &&
239 (sp->sender_all_done)) {
241 * We are doing differed cleanup. Last time
242 * through when we took all the data the
243 * sender_all_done was not set.
245 if (sp->put_last_out == 0) {
246 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
247 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
253 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
254 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
255 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp, 1);
257 sctp_free_remote_addr(sp->net);
261 sctp_m_freem(sp->data);
264 sctp_free_a_strmoq(stcb, sp, so_locked);
265 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
271 if (unsent_data > 0) {
276 SCTP_TCB_SEND_UNLOCK(stcb);
277 return (unsent_data);
281 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
283 struct sctp_init *init;
284 struct sctp_association *asoc;
285 struct sctp_nets *lnet;
290 /* save off parameters */
291 asoc->peer_vtag = ntohl(init->initiate_tag);
292 asoc->peers_rwnd = ntohl(init->a_rwnd);
294 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
296 if (!TAILQ_EMPTY(&asoc->nets)) {
297 /* update any ssthresh's that may have a default */
298 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
299 lnet->ssthresh = asoc->peers_rwnd;
300 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
301 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
305 SCTP_TCB_SEND_LOCK(stcb);
306 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
308 struct sctp_stream_out *outs;
309 struct sctp_stream_queue_pending *sp, *nsp;
310 struct sctp_tmit_chunk *chk, *nchk;
312 /* abandon the upper streams */
313 newcnt = ntohs(init->num_inbound_streams);
314 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
315 if (chk->rec.data.sid >= newcnt) {
316 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
317 asoc->send_queue_cnt--;
318 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
319 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
322 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
325 if (chk->data != NULL) {
326 sctp_free_bufspace(stcb, asoc, chk, 1);
327 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
328 0, chk, SCTP_SO_NOT_LOCKED);
330 sctp_m_freem(chk->data);
334 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
335 /* sa_ignore FREED_MEMORY */
339 for (i = newcnt; i < asoc->pre_open_streams; i++) {
340 outs = &asoc->strmout[i];
341 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
342 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
343 TAILQ_REMOVE(&outs->outqueue, sp, next);
344 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
345 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
346 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
348 sctp_m_freem(sp->data);
352 sctp_free_remote_addr(sp->net);
356 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
357 /* sa_ignore FREED_MEMORY */
359 outs->state = SCTP_STREAM_CLOSED;
362 /* cut back the count */
363 asoc->pre_open_streams = newcnt;
365 SCTP_TCB_SEND_UNLOCK(stcb);
366 asoc->streamoutcnt = asoc->pre_open_streams;
368 for (i = 0; i < asoc->streamoutcnt; i++) {
369 asoc->strmout[i].state = SCTP_STREAM_OPEN;
372 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
373 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
374 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
375 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
377 /* This is the next one we expect */
378 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
380 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
381 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
383 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
384 /* open the requested streams */
386 if (asoc->strmin != NULL) {
387 /* Free the old ones */
388 for (i = 0; i < asoc->streamincnt; i++) {
389 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
390 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
392 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
394 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
395 asoc->streamincnt = ntohs(init->num_outbound_streams);
397 asoc->streamincnt = asoc->max_inbound_streams;
399 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
400 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
401 if (asoc->strmin == NULL) {
402 /* we didn't get memory for the streams! */
403 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
406 for (i = 0; i < asoc->streamincnt; i++) {
407 asoc->strmin[i].sid = i;
408 asoc->strmin[i].last_mid_delivered = 0xffffffff;
409 TAILQ_INIT(&asoc->strmin[i].inqueue);
410 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
411 asoc->strmin[i].pd_api_started = 0;
412 asoc->strmin[i].delivery_started = 0;
415 * load_address_from_init will put the addresses into the
416 * association when the COOKIE is processed or the INIT-ACK is
417 * processed. Both types of COOKIE's existing and new call this
418 * routine. It will remove addresses that are no longer in the
419 * association (for the restarting case where addresses are
420 * removed). Up front when the INIT arrives we will discard it if it
421 * is a restart and new addresses have been added.
423 /* sa_ignore MEMLEAK */
428 * INIT-ACK message processing/consumption returns value < 0 on error
431 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
432 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
433 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
434 struct sctp_nets *net, int *abort_no_unlock,
435 uint8_t mflowtype, uint32_t mflowid,
438 struct sctp_association *asoc;
440 int retval, abort_flag, cookie_found;
442 int nat_friendly = 0;
444 /* First verify that we have no illegal param's */
448 op_err = sctp_arethere_unrecognized_parameters(m,
449 (offset + sizeof(struct sctp_init_chunk)),
450 &abort_flag, (struct sctp_chunkhdr *)cp,
451 &nat_friendly, &cookie_found);
453 /* Send an abort and notify peer */
454 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
455 *abort_no_unlock = 1;
461 /* Only report the missing cookie parameter */
462 if (op_err != NULL) {
463 sctp_m_freem(op_err);
465 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
466 /* We abort with an error of missing mandatory param */
467 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
468 if (op_err != NULL) {
469 struct sctp_error_missing_param *cause;
471 SCTP_BUF_LEN(op_err) = len;
472 cause = mtod(op_err, struct sctp_error_missing_param *);
473 /* Subtract the reserved param */
474 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
475 cause->cause.length = htons(len);
476 cause->num_missing_params = htonl(1);
477 cause->type[0] = htons(SCTP_STATE_COOKIE);
479 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
480 src, dst, sh, op_err,
483 *abort_no_unlock = 1;
487 asoc->peer_supports_nat = (uint8_t)nat_friendly;
488 /* process the peer's parameters in the INIT-ACK */
489 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
491 if (op_err != NULL) {
492 sctp_m_freem(op_err);
496 initack_limit = offset + ntohs(cp->ch.chunk_length);
497 /* load all addresses */
498 if ((retval = sctp_load_addresses_from_init(stcb, m,
499 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
500 src, dst, NULL, stcb->asoc.port))) {
501 if (op_err != NULL) {
502 sctp_m_freem(op_err);
504 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
505 "Problem with address parameters");
506 SCTPDBG(SCTP_DEBUG_INPUT1,
507 "Load addresses from INIT causes an abort %d\n",
509 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
510 src, dst, sh, op_err,
513 *abort_no_unlock = 1;
516 /* if the peer doesn't support asconf, flush the asconf queue */
517 if (asoc->asconf_supported == 0) {
518 struct sctp_asconf_addr *param, *nparam;
520 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
521 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
522 SCTP_FREE(param, SCTP_M_ASC_ADDR);
526 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
527 stcb->asoc.local_hmacs);
529 sctp_queue_op_err(stcb, op_err);
530 /* queuing will steal away the mbuf chain to the out queue */
533 /* extract the cookie and queue it to "echo" it back... */
534 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
535 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
536 stcb->asoc.overall_error_count,
538 SCTP_FROM_SCTP_INPUT,
541 stcb->asoc.overall_error_count = 0;
542 net->error_count = 0;
545 * Cancel the INIT timer, We do this first before queueing the
546 * cookie. We always cancel at the primary to assue that we are
547 * canceling the timer started by the INIT which always goes to the
550 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
551 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
553 /* calculate the RTO */
554 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
555 SCTP_RTT_FROM_NON_DATA);
556 retval = sctp_send_cookie_echo(m, offset, initack_limit, stcb, net);
561 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
562 struct sctp_tcb *stcb, struct sctp_nets *net)
564 union sctp_sockstore store;
565 struct sctp_nets *r_net, *f_net;
568 uint16_t old_error_counter;
570 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
575 memset(&store, 0, sizeof(store));
576 switch (cp->heartbeat.hb_info.addr_family) {
579 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
580 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
581 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
582 store.sin.sin_port = stcb->rport;
583 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
584 sizeof(store.sin.sin_addr));
592 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
593 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
594 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
595 store.sin6.sin6_port = stcb->rport;
596 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
605 r_net = sctp_findnet(stcb, &store.sa);
607 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
610 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
611 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
612 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
614 * If the its a HB and it's random value is correct when can
615 * confirm the destination.
617 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
618 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
619 stcb->asoc.primary_destination = r_net;
620 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
621 f_net = TAILQ_FIRST(&stcb->asoc.nets);
622 if (f_net != r_net) {
624 * first one on the list is NOT the primary
625 * sctp_cmpaddr() is much more efficient if
626 * the primary is the first on the list,
629 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
630 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
634 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
635 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
636 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
637 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
638 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
640 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
641 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
642 stcb->asoc.overall_error_count,
644 SCTP_FROM_SCTP_INPUT,
647 stcb->asoc.overall_error_count = 0;
648 old_error_counter = r_net->error_count;
649 r_net->error_count = 0;
650 r_net->hb_responded = 1;
651 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
652 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
653 /* Now lets do a RTO with this */
654 sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
655 SCTP_RTT_FROM_NON_DATA);
656 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
657 r_net->dest_state |= SCTP_ADDR_REACHABLE;
658 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
659 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
661 if (r_net->dest_state & SCTP_ADDR_PF) {
662 r_net->dest_state &= ~SCTP_ADDR_PF;
663 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
665 if (old_error_counter > 0) {
666 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
667 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
668 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
670 if (r_net == stcb->asoc.primary_destination) {
671 if (stcb->asoc.alternate) {
672 /* release the alternate, primary is good */
673 sctp_free_remote_addr(stcb->asoc.alternate);
674 stcb->asoc.alternate = NULL;
677 /* Mobility adaptation */
679 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
680 SCTP_MOBILITY_BASE) ||
681 sctp_is_mobility_feature_on(stcb->sctp_ep,
682 SCTP_MOBILITY_FASTHANDOFF)) &&
683 sctp_is_mobility_feature_on(stcb->sctp_ep,
684 SCTP_MOBILITY_PRIM_DELETED)) {
685 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
686 stcb->sctp_ep, stcb, NULL,
687 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
688 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
689 SCTP_MOBILITY_FASTHANDOFF)) {
690 sctp_assoc_immediate_retrans(stcb,
691 stcb->asoc.primary_destination);
693 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
694 SCTP_MOBILITY_BASE)) {
695 sctp_move_chunks_from_net(stcb,
696 stcb->asoc.deleted_primary);
698 sctp_delete_prim_timer(stcb->sctp_ep, stcb);
704 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
707 * Return 0 means we want you to proceed with the abort non-zero
708 * means no abort processing.
711 struct sctpasochead *head;
713 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
714 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
715 new_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
716 atomic_add_int(&stcb->asoc.refcnt, 1);
717 SCTP_TCB_UNLOCK(stcb);
718 SCTP_INP_INFO_WLOCK();
720 atomic_subtract_int(&stcb->asoc.refcnt, 1);
724 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
725 /* generate a new vtag and send init */
726 LIST_REMOVE(stcb, sctp_asocs);
727 stcb->asoc.my_vtag = new_vtag;
728 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
730 * put it in the bucket in the vtag hash of assoc's for the
733 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
734 SCTP_INP_INFO_WUNLOCK();
735 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
739 * treat like a case where the cookie expired i.e.: - dump
740 * current cookie. - generate a new vtag. - resend init.
742 /* generate a new vtag and send init */
743 LIST_REMOVE(stcb, sctp_asocs);
744 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
745 sctp_stop_all_cookie_timers(stcb);
746 sctp_toss_old_cookies(stcb, &stcb->asoc);
747 stcb->asoc.my_vtag = new_vtag;
748 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
750 * put it in the bucket in the vtag hash of assoc's for the
753 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
754 SCTP_INP_INFO_WUNLOCK();
755 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
762 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
763 struct sctp_nets *net)
766 * return 0 means we want you to proceed with the abort non-zero
767 * means no abort processing
769 if (stcb->asoc.auth_supported == 0) {
770 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
773 sctp_asconf_send_nat_state_update(stcb, net);
777 /* Returns 1 if the stcb was aborted, 0 otherwise */
779 sctp_handle_abort(struct sctp_abort_chunk *abort,
780 struct sctp_tcb *stcb, struct sctp_nets *net)
785 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
789 len = ntohs(abort->ch.chunk_length);
790 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
792 * Need to check the cause codes for our two magic nat
793 * aborts which don't kill the assoc necessarily.
795 struct sctp_error_cause *cause;
797 cause = (struct sctp_error_cause *)(abort + 1);
798 error = ntohs(cause->code);
799 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
800 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ABORT flags:%x\n",
801 abort->ch.chunk_flags);
802 if (sctp_handle_nat_colliding_state(stcb)) {
805 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
806 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ABORT flags:%x\n",
807 abort->ch.chunk_flags);
808 if (sctp_handle_nat_missing_state(stcb, net)) {
815 /* stop any receive timers */
816 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
817 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
818 /* notify user of the abort and clean up... */
819 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
821 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
822 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
823 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
824 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
826 #ifdef SCTP_ASOCLOG_OF_TSNS
827 sctp_print_out_track_log(stcb);
829 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
830 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
831 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
836 sctp_start_net_timers(struct sctp_tcb *stcb)
838 uint32_t cnt_hb_sent;
839 struct sctp_nets *net;
842 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
844 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
845 * If the dest in unconfirmed send a hb as well if under
846 * max_hb_burst have been sent.
848 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
849 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
850 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
851 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
852 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
857 sctp_chunk_output(stcb->sctp_ep, stcb,
858 SCTP_OUTPUT_FROM_COOKIE_ACK,
864 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
865 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
867 struct sctp_association *asoc;
868 int some_on_streamwheel;
871 SCTPDBG(SCTP_DEBUG_INPUT2,
872 "sctp_handle_shutdown: handling SHUTDOWN\n");
876 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
877 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
880 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
881 /* Shutdown NOT the expected size */
884 old_state = SCTP_GET_STATE(stcb);
885 sctp_update_acked(stcb, cp, abort_flag);
889 if (asoc->control_pdapi) {
891 * With a normal shutdown we assume the end of last record.
893 SCTP_INP_READ_LOCK(stcb->sctp_ep);
894 if (asoc->control_pdapi->on_strm_q) {
895 struct sctp_stream_in *strm;
897 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
898 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
900 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
901 asoc->control_pdapi->on_strm_q = 0;
902 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
904 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
905 asoc->control_pdapi->on_strm_q = 0;
908 panic("Unknown state on ctrl:%p on_strm_q:%d",
910 asoc->control_pdapi->on_strm_q);
914 asoc->control_pdapi->end_added = 1;
915 asoc->control_pdapi->pdapi_aborted = 1;
916 asoc->control_pdapi = NULL;
917 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
918 if (stcb->sctp_socket) {
919 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
922 /* goto SHUTDOWN_RECEIVED state to block new requests */
923 if (stcb->sctp_socket) {
924 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
925 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
926 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
927 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
929 * notify upper layer that peer has initiated a
932 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
935 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
938 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
940 * stop the shutdown timer, since we WILL move to
943 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
944 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
946 /* Now is there unsent data on a stream somewhere? */
947 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
949 if (!TAILQ_EMPTY(&asoc->send_queue) ||
950 !TAILQ_EMPTY(&asoc->sent_queue) ||
951 some_on_streamwheel) {
952 /* By returning we will push more data out */
955 /* no outstanding data to send, so move on... */
956 /* send SHUTDOWN-ACK */
957 /* move to SHUTDOWN-ACK-SENT state */
958 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
959 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
960 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
962 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
963 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
964 sctp_stop_timers_for_shutdown(stcb);
965 sctp_send_shutdown_ack(stcb, net);
966 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
967 stcb->sctp_ep, stcb, net);
968 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
969 sctp_send_shutdown_ack(stcb, net);
975 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
976 struct sctp_tcb *stcb,
977 struct sctp_nets *net)
979 struct sctp_association *asoc;
981 SCTPDBG(SCTP_DEBUG_INPUT2,
982 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
987 /* process according to association state */
988 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
989 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
990 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
991 sctp_send_shutdown_complete(stcb, net, 1);
992 SCTP_TCB_UNLOCK(stcb);
995 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
996 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
997 /* unexpected SHUTDOWN-ACK... so ignore... */
998 SCTP_TCB_UNLOCK(stcb);
1001 if (asoc->control_pdapi) {
1003 * With a normal shutdown we assume the end of last record.
1005 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1006 asoc->control_pdapi->end_added = 1;
1007 asoc->control_pdapi->pdapi_aborted = 1;
1008 asoc->control_pdapi = NULL;
1009 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1010 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1013 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1014 !TAILQ_EMPTY(&asoc->sent_queue) ||
1015 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
1016 panic("Queues are not empty when handling SHUTDOWN-ACK");
1019 /* stop the timer */
1020 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
1021 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1022 /* send SHUTDOWN-COMPLETE */
1023 sctp_send_shutdown_complete(stcb, net, 0);
1024 /* notify upper layer protocol */
1025 if (stcb->sctp_socket) {
1026 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1027 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1028 stcb->sctp_socket->so_snd.sb_cc = 0;
1030 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1032 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1033 /* free the TCB but first save off the ep */
1034 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1035 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1039 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type)
1041 switch (chunk_type) {
1042 case SCTP_ASCONF_ACK:
1044 sctp_asconf_cleanup(stcb);
1046 case SCTP_IFORWARD_CUM_TSN:
1047 case SCTP_FORWARD_CUM_TSN:
1048 stcb->asoc.prsctp_supported = 0;
1051 SCTPDBG(SCTP_DEBUG_INPUT2,
1052 "Peer does not support chunk type %d (0x%x).\n",
1053 chunk_type, chunk_type);
1059 * Skip past the param header and then we will find the param that caused the
1060 * problem. There are a number of param's in a ASCONF OR the prsctp param
1061 * these will turn of specific features.
1062 * XXX: Is this the right thing to do?
1065 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1067 switch (parameter_type) {
1069 case SCTP_PRSCTP_SUPPORTED:
1070 stcb->asoc.prsctp_supported = 0;
1072 case SCTP_SUPPORTED_CHUNK_EXT:
1074 /* draft-ietf-tsvwg-addip-sctp */
1075 case SCTP_HAS_NAT_SUPPORT:
1076 stcb->asoc.peer_supports_nat = 0;
1078 case SCTP_ADD_IP_ADDRESS:
1079 case SCTP_DEL_IP_ADDRESS:
1080 case SCTP_SET_PRIM_ADDR:
1081 stcb->asoc.asconf_supported = 0;
1083 case SCTP_SUCCESS_REPORT:
1084 case SCTP_ERROR_CAUSE_IND:
1085 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1086 SCTPDBG(SCTP_DEBUG_INPUT2,
1087 "Turning off ASCONF to this strange peer\n");
1088 stcb->asoc.asconf_supported = 0;
1091 SCTPDBG(SCTP_DEBUG_INPUT2,
1092 "Peer does not support param type %d (0x%x)??\n",
1093 parameter_type, parameter_type);
1099 sctp_handle_error(struct sctp_chunkhdr *ch,
1100 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1102 struct sctp_error_cause *cause;
1103 struct sctp_association *asoc;
1104 uint32_t remaining_length, adjust;
1105 uint16_t code, cause_code, cause_length;
1107 /* parse through all of the errors and process */
1109 cause = (struct sctp_error_cause *)((caddr_t)ch +
1110 sizeof(struct sctp_chunkhdr));
1111 remaining_length = ntohs(ch->chunk_length);
1112 if (remaining_length > limit) {
1113 remaining_length = limit;
1115 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1116 remaining_length -= sizeof(struct sctp_chunkhdr);
1118 remaining_length = 0;
1121 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1122 /* Process an Error Cause */
1123 cause_code = ntohs(cause->code);
1124 cause_length = ntohs(cause->length);
1125 if ((cause_length > remaining_length) || (cause_length == 0)) {
1126 /* Invalid cause length, possibly due to truncation. */
1127 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1128 remaining_length, cause_length);
1132 /* report the first error cause */
1135 switch (cause_code) {
1136 case SCTP_CAUSE_INVALID_STREAM:
1137 case SCTP_CAUSE_MISSING_PARAM:
1138 case SCTP_CAUSE_INVALID_PARAM:
1139 case SCTP_CAUSE_NO_USER_DATA:
1140 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1143 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1144 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ERROR flags: %x\n",
1146 if (sctp_handle_nat_colliding_state(stcb)) {
1150 case SCTP_CAUSE_NAT_MISSING_STATE:
1151 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ERROR flags: %x\n",
1153 if (sctp_handle_nat_missing_state(stcb, net)) {
1157 case SCTP_CAUSE_STALE_COOKIE:
1159 * We only act if we have echoed a cookie and are
1162 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1163 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1164 struct sctp_error_stale_cookie *stale_cookie;
1166 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1167 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time);
1168 /* Double it to be more robust on RTX */
1169 if (asoc->cookie_preserve_req <= UINT32_MAX / 2) {
1170 asoc->cookie_preserve_req *= 2;
1172 asoc->cookie_preserve_req = UINT32_MAX;
1174 asoc->stale_cookie_count++;
1175 if (asoc->stale_cookie_count >
1176 asoc->max_init_times) {
1177 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1178 /* now free the asoc */
1179 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1180 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1183 /* blast back to INIT state */
1184 sctp_toss_old_cookies(stcb, &stcb->asoc);
1185 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1186 sctp_stop_all_cookie_timers(stcb);
1187 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1190 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1192 * Nothing we can do here, we don't do hostname
1193 * addresses so if the peer does not like my IPv6
1194 * (or IPv4 for that matter) it does not matter. If
1195 * they don't support that type of address, they can
1196 * NOT possibly get that packet type... i.e. with no
1197 * IPv6 you can't receive a IPv6 packet. so we can
1198 * safely ignore this one. If we ever added support
1199 * for HOSTNAME Addresses, then we would need to do
1203 case SCTP_CAUSE_UNRECOG_CHUNK:
1204 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1205 struct sctp_error_unrecognized_chunk *unrec_chunk;
1207 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1208 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type);
1211 case SCTP_CAUSE_UNRECOG_PARAM:
1212 /* XXX: We only consider the first parameter */
1213 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1214 struct sctp_paramhdr *unrec_parameter;
1216 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1217 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1220 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1222 * We ignore this since the timer will drive out a
1223 * new cookie anyway and there timer will drive us
1224 * to send a SHUTDOWN_COMPLETE. We can't send one
1225 * here since we don't have their tag.
1228 case SCTP_CAUSE_DELETING_LAST_ADDR:
1229 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1230 case SCTP_CAUSE_DELETING_SRC_ADDR:
1232 * We should NOT get these here, but in a
1235 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1238 case SCTP_CAUSE_OUT_OF_RESC:
1240 * And what, pray tell do we do with the fact that
1241 * the peer is out of resources? Not really sure we
1242 * could do anything but abort. I suspect this
1243 * should have came WITH an abort instead of in a
1248 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1252 adjust = SCTP_SIZE32(cause_length);
1253 if (remaining_length >= adjust) {
1254 remaining_length -= adjust;
1256 remaining_length = 0;
1258 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1260 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1265 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1266 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1267 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1268 struct sctp_nets *net, int *abort_no_unlock,
1269 uint8_t mflowtype, uint32_t mflowid,
1272 struct sctp_init_ack *init_ack;
1273 struct mbuf *op_err;
1275 SCTPDBG(SCTP_DEBUG_INPUT2,
1276 "sctp_handle_init_ack: handling INIT-ACK\n");
1279 SCTPDBG(SCTP_DEBUG_INPUT2,
1280 "sctp_handle_init_ack: TCB is null\n");
1283 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1284 /* Invalid length */
1285 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1286 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1287 src, dst, sh, op_err,
1290 *abort_no_unlock = 1;
1293 init_ack = &cp->init;
1294 /* validate parameters */
1295 if (init_ack->initiate_tag == 0) {
1296 /* protocol error... send an abort */
1297 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1298 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1299 src, dst, sh, op_err,
1302 *abort_no_unlock = 1;
1305 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1306 /* protocol error... send an abort */
1307 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1308 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1309 src, dst, sh, op_err,
1312 *abort_no_unlock = 1;
1315 if (init_ack->num_inbound_streams == 0) {
1316 /* protocol error... send an abort */
1317 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1318 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1319 src, dst, sh, op_err,
1322 *abort_no_unlock = 1;
1325 if (init_ack->num_outbound_streams == 0) {
1326 /* protocol error... send an abort */
1327 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1328 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1329 src, dst, sh, op_err,
1332 *abort_no_unlock = 1;
1335 /* process according to association state... */
1336 switch (SCTP_GET_STATE(stcb)) {
1337 case SCTP_STATE_COOKIE_WAIT:
1338 /* this is the expected state for this chunk */
1339 /* process the INIT-ACK parameters */
1340 if (stcb->asoc.primary_destination->dest_state &
1341 SCTP_ADDR_UNCONFIRMED) {
1343 * The primary is where we sent the INIT, we can
1344 * always consider it confirmed when the INIT-ACK is
1345 * returned. Do this before we load addresses
1348 stcb->asoc.primary_destination->dest_state &=
1349 ~SCTP_ADDR_UNCONFIRMED;
1350 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1351 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1353 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1354 net, abort_no_unlock,
1357 /* error in parsing parameters */
1360 /* update our state */
1361 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1362 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1364 /* reset the RTO calc */
1365 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1366 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1367 stcb->asoc.overall_error_count,
1369 SCTP_FROM_SCTP_INPUT,
1372 stcb->asoc.overall_error_count = 0;
1373 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1375 * collapse the init timer back in case of a exponential
1378 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1381 * the send at the end of the inbound data processing will
1382 * cause the cookie to be sent
1385 case SCTP_STATE_SHUTDOWN_SENT:
1386 /* incorrect state... discard */
1388 case SCTP_STATE_COOKIE_ECHOED:
1389 /* incorrect state... discard */
1391 case SCTP_STATE_OPEN:
1392 /* incorrect state... discard */
1394 case SCTP_STATE_EMPTY:
1395 case SCTP_STATE_INUSE:
1397 /* incorrect state... discard */
1401 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1405 static struct sctp_tcb *
1406 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1407 struct sockaddr *src, struct sockaddr *dst,
1408 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1409 struct sctp_inpcb *inp, struct sctp_nets **netp,
1410 struct sockaddr *init_src, int *notification,
1411 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1412 uint8_t mflowtype, uint32_t mflowid,
1413 uint32_t vrf_id, uint16_t port);
1416 * handle a state cookie for an existing association m: input packet mbuf
1417 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1418 * "split" mbuf and the cookie signature does not exist offset: offset into
1419 * mbuf to the cookie-echo chunk
1421 static struct sctp_tcb *
1422 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1423 struct sockaddr *src, struct sockaddr *dst,
1424 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1425 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1426 struct sockaddr *init_src, int *notification,
1427 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1428 uint8_t mflowtype, uint32_t mflowid,
1429 uint32_t vrf_id, uint16_t port)
1431 struct sctp_association *asoc;
1432 struct sctp_init_chunk *init_cp, init_buf;
1433 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1434 struct sctp_nets *net;
1435 struct mbuf *op_err;
1437 int init_offset, initack_offset, i;
1441 #if defined(SCTP_DETAILED_STR_STATS)
1446 /* I know that the TCB is non-NULL from the caller */
1448 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1449 if (asoc->cookie_how[how_indx] == 0)
1452 if (how_indx < sizeof(asoc->cookie_how)) {
1453 asoc->cookie_how[how_indx] = 1;
1455 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1456 /* SHUTDOWN came in after sending INIT-ACK */
1457 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1458 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1459 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1460 mflowtype, mflowid, inp->fibnum,
1462 if (how_indx < sizeof(asoc->cookie_how))
1463 asoc->cookie_how[how_indx] = 2;
1467 * find and validate the INIT chunk in the cookie (peer's info) the
1468 * INIT should start after the cookie-echo header struct (chunk
1469 * header, state cookie header struct)
1471 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1473 init_cp = (struct sctp_init_chunk *)
1474 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1475 (uint8_t *)&init_buf);
1476 if (init_cp == NULL) {
1477 /* could not pull a INIT chunk in cookie */
1480 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1484 * find and validate the INIT-ACK chunk in the cookie (my info) the
1485 * INIT-ACK follows the INIT chunk
1487 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1488 initack_cp = (struct sctp_init_ack_chunk *)
1489 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1490 (uint8_t *)&initack_buf);
1491 if (initack_cp == NULL) {
1492 /* could not pull INIT-ACK chunk in cookie */
1495 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1498 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1499 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1501 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1502 * to get into the OPEN state
1504 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1506 * Opps, this means that we somehow generated two vtag's
1507 * the same. I.e. we did:
1509 * <---INIT(tag=a)------
1510 * ----INIT-ACK(tag=t)-->
1511 * ----INIT(tag=t)------> *1
1512 * <---INIT-ACK(tag=a)---
1513 * <----CE(tag=t)------------- *2
1515 * At point *1 we should be generating a different
1516 * tag t'. Which means we would throw away the CE and send
1517 * ours instead. Basically this is case C (throw away side).
1519 if (how_indx < sizeof(asoc->cookie_how))
1520 asoc->cookie_how[how_indx] = 17;
1523 switch (SCTP_GET_STATE(stcb)) {
1524 case SCTP_STATE_COOKIE_WAIT:
1525 case SCTP_STATE_COOKIE_ECHOED:
1527 * INIT was sent but got a COOKIE_ECHO with the
1528 * correct tags... just accept it...but we must
1529 * process the init so that we can make sure we have
1530 * the right seq no's.
1532 /* First we must process the INIT !! */
1533 retval = sctp_process_init(init_cp, stcb);
1535 if (how_indx < sizeof(asoc->cookie_how))
1536 asoc->cookie_how[how_indx] = 3;
1539 /* we have already processed the INIT so no problem */
1540 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1542 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1543 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1545 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1546 /* update current state */
1547 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1548 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1550 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1552 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1553 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1554 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1555 stcb->sctp_ep, stcb, NULL);
1557 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1558 sctp_stop_all_cookie_timers(stcb);
1559 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1560 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1561 (!SCTP_IS_LISTENING(inp))) {
1563 * Here is where collision would go if we
1564 * did a connect() and instead got a
1565 * init/init-ack/cookie done before the
1566 * init-ack came back..
1568 stcb->sctp_ep->sctp_flags |=
1569 SCTP_PCB_FLAGS_CONNECTED;
1570 soisconnected(stcb->sctp_socket);
1572 /* notify upper layer */
1573 *notification = SCTP_NOTIFY_ASSOC_UP;
1575 * since we did not send a HB make sure we don't
1578 old.tv_sec = cookie->time_entered.tv_sec;
1579 old.tv_usec = cookie->time_entered.tv_usec;
1580 net->hb_responded = 1;
1581 sctp_calculate_rto(stcb, asoc, net, &old,
1582 SCTP_RTT_FROM_NON_DATA);
1584 if (stcb->asoc.sctp_autoclose_ticks &&
1585 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1586 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1592 * we're in the OPEN state (or beyond), so peer must
1593 * have simply lost the COOKIE-ACK
1597 sctp_stop_all_cookie_timers(stcb);
1599 * We ignore the return code here.. not sure if we should
1600 * somehow abort.. but we do have an existing asoc. This
1601 * really should not fail.
1603 if (sctp_load_addresses_from_init(stcb, m,
1604 init_offset + sizeof(struct sctp_init_chunk),
1605 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1606 if (how_indx < sizeof(asoc->cookie_how))
1607 asoc->cookie_how[how_indx] = 4;
1610 /* respond with a COOKIE-ACK */
1611 sctp_toss_old_cookies(stcb, asoc);
1612 sctp_send_cookie_ack(stcb);
1613 if (how_indx < sizeof(asoc->cookie_how))
1614 asoc->cookie_how[how_indx] = 5;
1618 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1619 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1620 cookie->tie_tag_my_vtag == 0 &&
1621 cookie->tie_tag_peer_vtag == 0) {
1623 * case C in Section 5.2.4 Table 2: XMOO silently discard
1625 if (how_indx < sizeof(asoc->cookie_how))
1626 asoc->cookie_how[how_indx] = 6;
1630 * If nat support, and the below and stcb is established, send back
1631 * a ABORT(colliding state) if we are established.
1633 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1634 (asoc->peer_supports_nat) &&
1635 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1636 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1637 (asoc->peer_vtag == 0)))) {
1639 * Special case - Peer's support nat. We may have two init's
1640 * that we gave out the same tag on since one was not
1641 * established.. i.e. we get INIT from host-1 behind the nat
1642 * and we respond tag-a, we get a INIT from host-2 behind
1643 * the nat and we get tag-a again. Then we bring up host-1
1644 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1645 * Now we have colliding state. We must send an abort here
1646 * with colliding state indication.
1648 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1649 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1650 mflowtype, mflowid, inp->fibnum,
1654 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1655 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1656 (asoc->peer_vtag == 0))) {
1658 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1659 * should be ok, re-accept peer info
1661 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1663 * Extension of case C. If we hit this, then the
1664 * random number generator returned the same vtag
1665 * when we first sent our INIT-ACK and when we later
1666 * sent our INIT. The side with the seq numbers that
1667 * are different will be the one that normnally
1668 * would have hit case C. This in effect "extends"
1669 * our vtags in this collision case to be 64 bits.
1670 * The same collision could occur aka you get both
1671 * vtag and seq number the same twice in a row.. but
1672 * is much less likely. If it did happen then we
1673 * would proceed through and bring up the assoc.. we
1674 * may end up with the wrong stream setup however..
1675 * which would be bad.. but there is no way to
1676 * tell.. until we send on a stream that does not
1679 if (how_indx < sizeof(asoc->cookie_how))
1680 asoc->cookie_how[how_indx] = 7;
1684 if (how_indx < sizeof(asoc->cookie_how))
1685 asoc->cookie_how[how_indx] = 8;
1686 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1687 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1688 sctp_stop_all_cookie_timers(stcb);
1690 * since we did not send a HB make sure we don't double
1693 net->hb_responded = 1;
1694 if (stcb->asoc.sctp_autoclose_ticks &&
1695 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1696 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1699 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1700 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1702 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1704 * Ok the peer probably discarded our data (if we
1705 * echoed a cookie+data). So anything on the
1706 * sent_queue should be marked for retransmit, we
1707 * may not get something to kick us so it COULD
1708 * still take a timeout to move these.. but it can't
1709 * hurt to mark them.
1711 struct sctp_tmit_chunk *chk;
1713 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1714 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1715 chk->sent = SCTP_DATAGRAM_RESEND;
1716 sctp_flight_size_decrease(chk);
1717 sctp_total_flight_decrease(stcb, chk);
1718 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1723 /* process the INIT info (peer's info) */
1724 retval = sctp_process_init(init_cp, stcb);
1726 if (how_indx < sizeof(asoc->cookie_how))
1727 asoc->cookie_how[how_indx] = 9;
1730 if (sctp_load_addresses_from_init(stcb, m,
1731 init_offset + sizeof(struct sctp_init_chunk),
1732 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1733 if (how_indx < sizeof(asoc->cookie_how))
1734 asoc->cookie_how[how_indx] = 10;
1737 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1738 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1739 *notification = SCTP_NOTIFY_ASSOC_UP;
1741 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1742 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1743 (!SCTP_IS_LISTENING(inp))) {
1744 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
1745 soisconnected(stcb->sctp_socket);
1747 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1748 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1750 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1751 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1752 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1753 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1755 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1757 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1758 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1759 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1760 stcb->sctp_ep, stcb, NULL);
1762 sctp_stop_all_cookie_timers(stcb);
1763 sctp_toss_old_cookies(stcb, asoc);
1764 sctp_send_cookie_ack(stcb);
1767 * only if we have retrans set do we do this. What
1768 * this call does is get only the COOKIE-ACK out and
1769 * then when we return the normal call to
1770 * sctp_chunk_output will get the retrans out behind
1773 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1775 if (how_indx < sizeof(asoc->cookie_how))
1776 asoc->cookie_how[how_indx] = 11;
1780 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1781 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1782 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1783 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1784 cookie->tie_tag_peer_vtag != 0) {
1785 struct sctpasochead *head;
1787 if (asoc->peer_supports_nat) {
1789 * This is a gross gross hack. Just call the
1790 * cookie_new code since we are allowing a duplicate
1791 * association. I hope this works...
1793 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1794 sh, cookie, cookie_len,
1795 inp, netp, init_src, notification,
1796 auth_skipped, auth_offset, auth_len,
1801 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1804 if (how_indx < sizeof(asoc->cookie_how))
1805 asoc->cookie_how[how_indx] = 12;
1806 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
1807 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1808 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1809 SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
1811 /* notify upper layer */
1812 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1813 atomic_add_int(&stcb->asoc.refcnt, 1);
1814 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1815 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1816 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1817 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1819 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1820 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1821 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1822 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1824 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1825 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1826 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1827 stcb->sctp_ep, stcb, NULL);
1829 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1830 /* move to OPEN state, if not in SHUTDOWN_SENT */
1831 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1833 asoc->pre_open_streams =
1834 ntohs(initack_cp->init.num_outbound_streams);
1835 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1836 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1837 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1839 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1841 asoc->str_reset_seq_in = asoc->init_seq_number;
1843 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1844 if (asoc->mapping_array) {
1845 memset(asoc->mapping_array, 0,
1846 asoc->mapping_array_size);
1848 if (asoc->nr_mapping_array) {
1849 memset(asoc->nr_mapping_array, 0,
1850 asoc->mapping_array_size);
1852 SCTP_TCB_UNLOCK(stcb);
1853 SCTP_INP_INFO_WLOCK();
1854 SCTP_INP_WLOCK(stcb->sctp_ep);
1855 SCTP_TCB_LOCK(stcb);
1856 atomic_add_int(&stcb->asoc.refcnt, -1);
1857 /* send up all the data */
1858 SCTP_TCB_SEND_LOCK(stcb);
1860 sctp_report_all_outbound(stcb, 0, SCTP_SO_LOCKED);
1861 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1862 stcb->asoc.strmout[i].chunks_on_queues = 0;
1863 #if defined(SCTP_DETAILED_STR_STATS)
1864 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1865 asoc->strmout[i].abandoned_sent[j] = 0;
1866 asoc->strmout[i].abandoned_unsent[j] = 0;
1869 asoc->strmout[i].abandoned_sent[0] = 0;
1870 asoc->strmout[i].abandoned_unsent[0] = 0;
1872 stcb->asoc.strmout[i].sid = i;
1873 stcb->asoc.strmout[i].next_mid_ordered = 0;
1874 stcb->asoc.strmout[i].next_mid_unordered = 0;
1875 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1877 /* process the INIT-ACK info (my info) */
1878 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1879 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1881 /* pull from vtag hash */
1882 LIST_REMOVE(stcb, sctp_asocs);
1883 /* re-insert to new vtag position */
1884 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1885 SCTP_BASE_INFO(hashasocmark))];
1887 * put it in the bucket in the vtag hash of assoc's for the
1890 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1892 SCTP_TCB_SEND_UNLOCK(stcb);
1893 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1894 SCTP_INP_INFO_WUNLOCK();
1895 asoc->total_flight = 0;
1896 asoc->total_flight_count = 0;
1897 /* process the INIT info (peer's info) */
1898 retval = sctp_process_init(init_cp, stcb);
1900 if (how_indx < sizeof(asoc->cookie_how))
1901 asoc->cookie_how[how_indx] = 13;
1906 * since we did not send a HB make sure we don't double
1909 net->hb_responded = 1;
1911 if (sctp_load_addresses_from_init(stcb, m,
1912 init_offset + sizeof(struct sctp_init_chunk),
1913 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1914 if (how_indx < sizeof(asoc->cookie_how))
1915 asoc->cookie_how[how_indx] = 14;
1919 /* respond with a COOKIE-ACK */
1920 sctp_stop_all_cookie_timers(stcb);
1921 sctp_toss_old_cookies(stcb, asoc);
1922 sctp_send_cookie_ack(stcb);
1923 if (how_indx < sizeof(asoc->cookie_how))
1924 asoc->cookie_how[how_indx] = 15;
1928 if (how_indx < sizeof(asoc->cookie_how))
1929 asoc->cookie_how[how_indx] = 16;
1930 /* all other cases... */
1935 * handle a state cookie for a new association m: input packet mbuf chain--
1936 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
1937 * and the cookie signature does not exist offset: offset into mbuf to the
1938 * cookie-echo chunk length: length of the cookie chunk to: where the init
1939 * was from returns a new TCB
1941 static struct sctp_tcb *
1942 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1943 struct sockaddr *src, struct sockaddr *dst,
1944 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1945 struct sctp_inpcb *inp, struct sctp_nets **netp,
1946 struct sockaddr *init_src, int *notification,
1947 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1948 uint8_t mflowtype, uint32_t mflowid,
1949 uint32_t vrf_id, uint16_t port)
1951 struct sctp_tcb *stcb;
1952 struct sctp_init_chunk *init_cp, init_buf;
1953 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1954 union sctp_sockstore store;
1955 struct sctp_association *asoc;
1956 int init_offset, initack_offset, initack_limit;
1959 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
1962 * find and validate the INIT chunk in the cookie (peer's info) the
1963 * INIT should start after the cookie-echo header struct (chunk
1964 * header, state cookie header struct)
1966 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
1967 init_cp = (struct sctp_init_chunk *)
1968 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1969 (uint8_t *)&init_buf);
1970 if (init_cp == NULL) {
1971 /* could not pull a INIT chunk in cookie */
1972 SCTPDBG(SCTP_DEBUG_INPUT1,
1973 "process_cookie_new: could not pull INIT chunk hdr\n");
1976 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1977 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
1980 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1982 * find and validate the INIT-ACK chunk in the cookie (my info) the
1983 * INIT-ACK follows the INIT chunk
1985 initack_cp = (struct sctp_init_ack_chunk *)
1986 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1987 (uint8_t *)&initack_buf);
1988 if (initack_cp == NULL) {
1989 /* could not pull INIT-ACK chunk in cookie */
1990 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
1993 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1997 * NOTE: We can't use the INIT_ACK's chk_length to determine the
1998 * "initack_limit" value. This is because the chk_length field
1999 * includes the length of the cookie, but the cookie is omitted when
2000 * the INIT and INIT_ACK are tacked onto the cookie...
2002 initack_limit = offset + cookie_len;
2005 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2010 * Here we do a trick, we set in NULL for the proc/thread argument.
2011 * We do this since in effect we only use the p argument when the
2012 * socket is unbound and we must do an implicit bind. Since we are
2013 * getting a cookie, we cannot be unbound.
2015 stcb = sctp_aloc_assoc(inp, init_src, &error,
2016 ntohl(initack_cp->init.initiate_tag), vrf_id,
2017 ntohs(initack_cp->init.num_outbound_streams),
2019 (struct thread *)NULL,
2020 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2022 struct mbuf *op_err;
2024 /* memory problem? */
2025 SCTPDBG(SCTP_DEBUG_INPUT1,
2026 "process_cookie_new: no room for another TCB!\n");
2027 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2028 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2029 src, dst, sh, op_err,
2035 /* get scope variables out of cookie */
2036 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2037 asoc->scope.site_scope = cookie->site_scope;
2038 asoc->scope.local_scope = cookie->local_scope;
2039 asoc->scope.loopback_scope = cookie->loopback_scope;
2041 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2042 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2043 struct mbuf *op_err;
2046 * Houston we have a problem. The EP changed while the
2047 * cookie was in flight. Only recourse is to abort the
2050 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2051 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2052 src, dst, sh, op_err,
2055 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2056 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2059 /* process the INIT-ACK info (my info) */
2060 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2061 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2062 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2063 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2064 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2065 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2066 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2067 asoc->str_reset_seq_in = asoc->init_seq_number;
2069 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2071 /* process the INIT info (peer's info) */
2072 retval = sctp_process_init(init_cp, stcb);
2074 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2075 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2078 /* load all addresses */
2079 if (sctp_load_addresses_from_init(stcb, m,
2080 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2081 src, dst, init_src, port)) {
2082 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2083 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2087 * verify any preceding AUTH chunk that was skipped
2089 /* pull the local authentication parameters from the cookie/init-ack */
2090 sctp_auth_get_cookie_params(stcb, m,
2091 initack_offset + sizeof(struct sctp_init_ack_chunk),
2092 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2094 struct sctp_auth_chunk *auth;
2096 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2097 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2101 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2102 /* auth HMAC failed, dump the assoc and packet */
2103 SCTPDBG(SCTP_DEBUG_AUTH1,
2104 "COOKIE-ECHO: AUTH failed\n");
2105 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2106 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2109 /* remaining chunks checked... good to go */
2110 stcb->asoc.authenticated = 1;
2115 * if we're doing ASCONFs, check to see if we have any new local
2116 * addresses that need to get added to the peer (eg. addresses
2117 * changed while cookie echo in flight). This needs to be done
2118 * after we go to the OPEN state to do the correct asconf
2119 * processing. else, make sure we have the correct addresses in our
2123 /* warning, we re-use sin, sin6, sa_store here! */
2124 /* pull in local_address (our "from" address) */
2125 switch (cookie->laddr_type) {
2127 case SCTP_IPV4_ADDRESS:
2128 /* source addr is IPv4 */
2129 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2130 store.sin.sin_family = AF_INET;
2131 store.sin.sin_len = sizeof(struct sockaddr_in);
2132 store.sin.sin_addr.s_addr = cookie->laddress[0];
2136 case SCTP_IPV6_ADDRESS:
2137 /* source addr is IPv6 */
2138 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2139 store.sin6.sin6_family = AF_INET6;
2140 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2141 store.sin6.sin6_scope_id = cookie->scope_id;
2142 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2146 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2147 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2151 /* update current state */
2152 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2153 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2154 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2155 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2156 stcb->sctp_ep, stcb, NULL);
2158 sctp_stop_all_cookie_timers(stcb);
2159 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2160 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2162 /* set up to notify upper layer */
2163 *notification = SCTP_NOTIFY_ASSOC_UP;
2164 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2165 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2166 (!SCTP_IS_LISTENING(inp))) {
2168 * This is an endpoint that called connect() how it got a
2169 * cookie that is NEW is a bit of a mystery. It must be that
2170 * the INIT was sent, but before it got there.. a complete
2171 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2172 * should have went to the other code.. not here.. oh well..
2173 * a bit of protection is worth having..
2175 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2176 soisconnected(stcb->sctp_socket);
2177 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2178 (SCTP_IS_LISTENING(inp))) {
2180 * We don't want to do anything with this one. Since it is
2181 * the listening guy. The timer will get started for
2182 * accepted connections in the caller.
2186 if (stcb->asoc.sctp_autoclose_ticks &&
2187 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2188 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2190 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2191 *netp = sctp_findnet(stcb, init_src);
2192 if (*netp != NULL) {
2196 * Since we did not send a HB, make sure we don't double
2199 (*netp)->hb_responded = 1;
2200 /* Calculate the RTT. */
2201 old.tv_sec = cookie->time_entered.tv_sec;
2202 old.tv_usec = cookie->time_entered.tv_usec;
2203 sctp_calculate_rto(stcb, asoc, *netp, &old, SCTP_RTT_FROM_NON_DATA);
2205 /* respond with a COOKIE-ACK */
2206 sctp_send_cookie_ack(stcb);
2209 * check the address lists for any ASCONFs that need to be sent
2210 * AFTER the cookie-ack is sent
2212 sctp_check_address_list(stcb, m,
2213 initack_offset + sizeof(struct sctp_init_ack_chunk),
2214 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2215 &store.sa, cookie->local_scope, cookie->site_scope,
2216 cookie->ipv4_scope, cookie->loopback_scope);
2222 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2223 * we NEED to make sure we are not already using the vtag. If so we
2224 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2225 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2226 SCTP_BASE_INFO(hashasocmark))];
2227 LIST_FOREACH(stcb, head, sctp_asocs) {
2228 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2229 -- SEND ABORT - TRY AGAIN --
2235 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2236 * existing (non-NULL) TCB
2238 static struct mbuf *
2239 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2240 struct sockaddr *src, struct sockaddr *dst,
2241 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2242 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2243 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2244 struct sctp_tcb **locked_tcb,
2245 uint8_t mflowtype, uint32_t mflowid,
2246 uint32_t vrf_id, uint16_t port)
2248 struct sctp_state_cookie *cookie;
2249 struct sctp_tcb *l_stcb = *stcb;
2250 struct sctp_inpcb *l_inp;
2251 struct sockaddr *to;
2252 struct sctp_pcb *ep;
2254 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2256 uint8_t cookie_ok = 0;
2257 unsigned int sig_offset, cookie_offset;
2258 unsigned int cookie_len;
2260 struct timeval time_expires;
2261 int notification = 0;
2262 struct sctp_nets *netl;
2263 int had_a_existing_tcb = 0;
2264 int send_int_conf = 0;
2266 struct sockaddr_in sin;
2269 struct sockaddr_in6 sin6;
2272 SCTPDBG(SCTP_DEBUG_INPUT2,
2273 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2275 if (inp_p == NULL) {
2278 cookie = &cp->cookie;
2279 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2280 cookie_len = ntohs(cp->ch.chunk_length);
2282 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2283 sizeof(struct sctp_init_chunk) +
2284 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2285 /* cookie too small */
2288 if ((cookie->peerport != sh->src_port) ||
2289 (cookie->myport != sh->dest_port) ||
2290 (cookie->my_vtag != sh->v_tag)) {
2292 * invalid ports or bad tag. Note that we always leave the
2293 * v_tag in the header in network order and when we stored
2294 * it in the my_vtag slot we also left it in network order.
2295 * This maintains the match even though it may be in the
2296 * opposite byte order of the machine :->
2301 * split off the signature into its own mbuf (since it should not be
2302 * calculated in the sctp_hmac_m() call).
2304 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2305 m_sig = m_split(m, sig_offset, M_NOWAIT);
2306 if (m_sig == NULL) {
2307 /* out of memory or ?? */
2310 #ifdef SCTP_MBUF_LOGGING
2311 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2312 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2317 * compute the signature/digest for the cookie
2319 ep = &(*inp_p)->sctp_ep;
2322 SCTP_TCB_UNLOCK(l_stcb);
2324 SCTP_INP_RLOCK(l_inp);
2326 SCTP_TCB_LOCK(l_stcb);
2328 /* which cookie is it? */
2329 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2330 (ep->current_secret_number != ep->last_secret_number)) {
2331 /* it's the old cookie */
2332 (void)sctp_hmac_m(SCTP_HMAC,
2333 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2334 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2336 /* it's the current cookie */
2337 (void)sctp_hmac_m(SCTP_HMAC,
2338 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2339 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2341 /* get the signature */
2342 SCTP_INP_RUNLOCK(l_inp);
2343 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2345 /* couldn't find signature */
2346 sctp_m_freem(m_sig);
2349 /* compare the received digest with the computed digest */
2350 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2351 /* try the old cookie? */
2352 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2353 (ep->current_secret_number != ep->last_secret_number)) {
2354 /* compute digest with old */
2355 (void)sctp_hmac_m(SCTP_HMAC,
2356 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2357 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2359 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2367 * Now before we continue we must reconstruct our mbuf so that
2368 * normal processing of any other chunks will work.
2374 while (SCTP_BUF_NEXT(m_at) != NULL) {
2375 m_at = SCTP_BUF_NEXT(m_at);
2377 SCTP_BUF_NEXT(m_at) = m_sig;
2380 if (cookie_ok == 0) {
2381 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2382 SCTPDBG(SCTP_DEBUG_INPUT2,
2383 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2384 (uint32_t)offset, cookie_offset, sig_offset);
2389 * check the cookie timestamps to be sure it's not stale
2391 (void)SCTP_GETTIME_TIMEVAL(&now);
2392 /* Expire time is in Ticks, so we convert to seconds */
2393 time_expires.tv_sec = cookie->time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2394 time_expires.tv_usec = cookie->time_entered.tv_usec;
2395 if (timevalcmp(&now, &time_expires, >)) {
2396 /* cookie is stale! */
2397 struct mbuf *op_err;
2398 struct sctp_error_stale_cookie *cause;
2399 struct timeval diff;
2402 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2403 0, M_NOWAIT, 1, MT_DATA);
2404 if (op_err == NULL) {
2409 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2410 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2411 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2412 cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
2413 (sizeof(uint32_t))));
2415 timevalsub(&diff, &time_expires);
2416 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2417 staleness = UINT32_MAX;
2419 staleness = diff.tv_sec * 1000000;
2421 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2422 staleness += diff.tv_usec;
2424 staleness = UINT32_MAX;
2426 cause->stale_time = htonl(staleness);
2427 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2428 mflowtype, mflowid, l_inp->fibnum,
2433 * Now we must see with the lookup address if we have an existing
2434 * asoc. This will only happen if we were in the COOKIE-WAIT state
2435 * and a INIT collided with us and somewhere the peer sent the
2436 * cookie on another address besides the single address our assoc
2437 * had for him. In this case we will have one of the tie-tags set at
2438 * least AND the address field in the cookie can be used to look it
2442 switch (cookie->addr_type) {
2444 case SCTP_IPV6_ADDRESS:
2445 memset(&sin6, 0, sizeof(sin6));
2446 sin6.sin6_family = AF_INET6;
2447 sin6.sin6_len = sizeof(sin6);
2448 sin6.sin6_port = sh->src_port;
2449 sin6.sin6_scope_id = cookie->scope_id;
2450 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2451 sizeof(sin6.sin6_addr.s6_addr));
2452 to = (struct sockaddr *)&sin6;
2456 case SCTP_IPV4_ADDRESS:
2457 memset(&sin, 0, sizeof(sin));
2458 sin.sin_family = AF_INET;
2459 sin.sin_len = sizeof(sin);
2460 sin.sin_port = sh->src_port;
2461 sin.sin_addr.s_addr = cookie->address[0];
2462 to = (struct sockaddr *)&sin;
2466 /* This should not happen */
2469 if (*stcb == NULL) {
2470 /* Yep, lets check */
2471 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2472 if (*stcb == NULL) {
2474 * We should have only got back the same inp. If we
2475 * got back a different ep we have a problem. The
2476 * original findep got back l_inp and now
2478 if (l_inp != *inp_p) {
2479 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2482 if (*locked_tcb == NULL) {
2484 * In this case we found the assoc only
2485 * after we locked the create lock. This
2486 * means we are in a colliding case and we
2487 * must make sure that we unlock the tcb if
2488 * its one of the cases where we throw away
2489 * the incoming packets.
2491 *locked_tcb = *stcb;
2494 * We must also increment the inp ref count
2495 * since the ref_count flags was set when we
2496 * did not find the TCB, now we found it
2497 * which reduces the refcount.. we must
2498 * raise it back out to balance it all :-)
2500 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2501 if ((*stcb)->sctp_ep != l_inp) {
2502 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2503 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2509 cookie_len -= SCTP_SIGNATURE_SIZE;
2510 if (*stcb == NULL) {
2511 /* this is the "normal" case... get a new TCB */
2512 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2513 cookie, cookie_len, *inp_p,
2514 netp, to, ¬ification,
2515 auth_skipped, auth_offset, auth_len,
2519 /* this is abnormal... cookie-echo on existing TCB */
2520 had_a_existing_tcb = 1;
2521 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2523 cookie, cookie_len, *inp_p, *stcb, netp, to,
2524 ¬ification, auth_skipped, auth_offset, auth_len,
2529 if (*stcb == NULL) {
2530 /* still no TCB... must be bad cookie-echo */
2533 if (*netp != NULL) {
2534 (*netp)->flowtype = mflowtype;
2535 (*netp)->flowid = mflowid;
2538 * Ok, we built an association so confirm the address we sent the
2541 netl = sctp_findnet(*stcb, to);
2543 * This code should in theory NOT run but
2546 /* TSNH! Huh, why do I need to add this address here? */
2547 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2548 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2551 netl = sctp_findnet(*stcb, to);
2554 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2555 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2556 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2561 sctp_start_net_timers(*stcb);
2562 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2563 if (!had_a_existing_tcb ||
2564 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2566 * If we have a NEW cookie or the connect never
2567 * reached the connected state during collision we
2568 * must do the TCP accept thing.
2570 struct socket *so, *oso;
2571 struct sctp_inpcb *inp;
2573 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2575 * For a restart we will keep the same
2576 * socket, no need to do anything. I THINK!!
2578 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2579 if (send_int_conf) {
2580 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2581 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2585 oso = (*inp_p)->sctp_socket;
2586 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2587 SCTP_TCB_UNLOCK((*stcb));
2588 CURVNET_SET(oso->so_vnet);
2589 so = sonewconn(oso, 0
2592 SCTP_TCB_LOCK((*stcb));
2593 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2596 struct mbuf *op_err;
2598 /* Too many sockets */
2599 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2600 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2601 sctp_abort_association(*inp_p, NULL, m, iphlen,
2602 src, dst, sh, op_err,
2605 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2606 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2609 inp = (struct sctp_inpcb *)so->so_pcb;
2610 SCTP_INP_INCR_REF(inp);
2612 * We add the unbound flag here so that if we get an
2613 * soabort() before we get the move_pcb done, we
2614 * will properly cleanup.
2616 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2617 SCTP_PCB_FLAGS_CONNECTED |
2618 SCTP_PCB_FLAGS_IN_TCPPOOL |
2619 SCTP_PCB_FLAGS_UNBOUND |
2620 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2621 SCTP_PCB_FLAGS_DONT_WAKE);
2622 inp->sctp_features = (*inp_p)->sctp_features;
2623 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2624 inp->sctp_socket = so;
2625 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2626 inp->max_cwnd = (*inp_p)->max_cwnd;
2627 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2628 inp->ecn_supported = (*inp_p)->ecn_supported;
2629 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2630 inp->auth_supported = (*inp_p)->auth_supported;
2631 inp->asconf_supported = (*inp_p)->asconf_supported;
2632 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2633 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2634 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2635 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2636 inp->sctp_context = (*inp_p)->sctp_context;
2637 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2638 inp->fibnum = (*inp_p)->fibnum;
2639 inp->inp_starting_point_for_iterator = NULL;
2641 * copy in the authentication parameters from the
2644 if (inp->sctp_ep.local_hmacs)
2645 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2646 inp->sctp_ep.local_hmacs =
2647 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2648 if (inp->sctp_ep.local_auth_chunks)
2649 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2650 inp->sctp_ep.local_auth_chunks =
2651 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2654 * Now we must move it from one hash table to
2655 * another and get the tcb in the right place.
2659 * This is where the one-2-one socket is put into
2660 * the accept state waiting for the accept!
2663 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2665 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2667 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2668 SCTP_TCB_UNLOCK((*stcb));
2670 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2672 SCTP_TCB_LOCK((*stcb));
2673 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2676 * now we must check to see if we were aborted while
2677 * the move was going on and the lock/unlock
2680 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2682 * yep it was, we leave the assoc attached
2683 * to the socket since the sctp_inpcb_free()
2684 * call will send an abort for us.
2686 SCTP_INP_DECR_REF(inp);
2689 SCTP_INP_DECR_REF(inp);
2690 /* Switch over to the new guy */
2692 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2693 if (send_int_conf) {
2694 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2695 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2699 * Pull it from the incomplete queue and wake the
2707 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2709 if (send_int_conf) {
2710 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2711 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2717 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2718 struct sctp_tcb *stcb, struct sctp_nets *net)
2720 /* cp must not be used, others call this without a c-ack :-) */
2721 struct sctp_association *asoc;
2722 struct sctp_tmit_chunk *chk;
2724 SCTPDBG(SCTP_DEBUG_INPUT2,
2725 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2726 if ((stcb == NULL) || (net == NULL)) {
2731 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2732 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2733 asoc->overall_error_count,
2735 SCTP_FROM_SCTP_INPUT,
2738 asoc->overall_error_count = 0;
2739 sctp_stop_all_cookie_timers(stcb);
2740 /* process according to association state */
2741 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2742 /* state change only needed when I am in right state */
2743 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2744 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2745 sctp_start_net_timers(stcb);
2746 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2747 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2748 stcb->sctp_ep, stcb, NULL);
2751 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2752 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2753 if (asoc->overall_error_count == 0) {
2754 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2755 SCTP_RTT_FROM_NON_DATA);
2757 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2758 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2759 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2760 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2761 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2762 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2763 soisconnected(stcb->sctp_socket);
2767 * since we did not send a HB make sure we don't double
2770 net->hb_responded = 1;
2772 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2774 * We don't need to do the asconf thing, nor hb or
2775 * autoclose if the socket is closed.
2780 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2783 if (stcb->asoc.sctp_autoclose_ticks &&
2784 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2785 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2786 stcb->sctp_ep, stcb, NULL);
2789 * send ASCONF if parameters are pending and ASCONFs are
2790 * allowed (eg. addresses changed when init/cookie echo were
2793 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2794 (stcb->asoc.asconf_supported == 1) &&
2795 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2796 #ifdef SCTP_TIMER_BASED_ASCONF
2797 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2798 stcb->sctp_ep, stcb,
2799 stcb->asoc.primary_destination);
2801 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2802 SCTP_ADDR_NOT_LOCKED);
2807 /* Toss the cookie if I can */
2808 sctp_toss_old_cookies(stcb, asoc);
2809 /* Restart the timer if we have pending data */
2810 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2811 if (chk->whoTo != NULL) {
2816 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2821 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2822 struct sctp_tcb *stcb)
2824 struct sctp_nets *net;
2825 struct sctp_tmit_chunk *lchk;
2826 struct sctp_ecne_chunk bkup;
2827 uint8_t override_bit;
2828 uint32_t tsn, window_data_tsn;
2830 unsigned int pkt_cnt;
2832 len = ntohs(cp->ch.chunk_length);
2833 if ((len != sizeof(struct sctp_ecne_chunk)) &&
2834 (len != sizeof(struct old_sctp_ecne_chunk))) {
2837 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2838 /* Its the old format */
2839 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2840 bkup.num_pkts_since_cwr = htonl(1);
2843 SCTP_STAT_INCR(sctps_recvecne);
2844 tsn = ntohl(cp->tsn);
2845 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2846 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2848 window_data_tsn = stcb->asoc.sending_seq - 1;
2850 window_data_tsn = lchk->rec.data.tsn;
2853 /* Find where it was sent to if possible. */
2855 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2856 if (lchk->rec.data.tsn == tsn) {
2858 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2861 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2867 * What to do. A previous send of a CWR was possibly lost.
2868 * See how old it is, we may have it marked on the actual
2871 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2872 if (tsn == net->last_cwr_tsn) {
2873 /* Found him, send it off */
2879 * If we reach here, we need to send a special CWR
2880 * that says hey, we did this a long time ago and
2881 * you lost the response.
2883 net = TAILQ_FIRST(&stcb->asoc.nets);
2888 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2895 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2896 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2898 * JRS - Use the congestion control given in the pluggable
2901 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2903 * We reduce once every RTT. So we will only lower cwnd at
2904 * the next sending seq i.e. the window_data_tsn
2906 net->cwr_window_tsn = window_data_tsn;
2907 net->ecn_ce_pkt_cnt += pkt_cnt;
2908 net->lost_cnt = pkt_cnt;
2909 net->last_cwr_tsn = tsn;
2911 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2912 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2913 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2915 * Another loss in the same window update how many
2916 * marks/packets lost we have had.
2920 if (pkt_cnt > net->lost_cnt) {
2921 /* Should be the case */
2922 cnt = (pkt_cnt - net->lost_cnt);
2923 net->ecn_ce_pkt_cnt += cnt;
2925 net->lost_cnt = pkt_cnt;
2926 net->last_cwr_tsn = tsn;
2928 * Most CC functions will ignore this call, since we
2929 * are in-window yet of the initial CE the peer saw.
2931 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2935 * We always send a CWR this way if our previous one was lost our
2936 * peer will get an update, or if it is not time again to reduce we
2937 * still get the cwr to the peer. Note we set the override when we
2938 * could not find the TSN on the chunk or the destination network.
2940 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2944 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2947 * Here we get a CWR from the peer. We must look in the outqueue and
2948 * make sure that we have a covered ECNE in the control chunk part.
2951 struct sctp_tmit_chunk *chk, *nchk;
2952 struct sctp_ecne_chunk *ecne;
2956 cwr_tsn = ntohl(cp->tsn);
2957 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
2958 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
2959 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
2962 if ((override == 0) && (chk->whoTo != net)) {
2963 /* Must be from the right src unless override is set */
2966 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
2967 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
2968 /* this covers this ECNE, we can remove it */
2969 stcb->asoc.ecn_echo_cnt_onq--;
2970 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
2972 stcb->asoc.ctrl_queue_cnt--;
2973 sctp_m_freem(chk->data);
2975 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
2976 if (override == 0) {
2984 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
2985 struct sctp_tcb *stcb, struct sctp_nets *net)
2988 SCTPDBG(SCTP_DEBUG_INPUT2,
2989 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
2993 /* process according to association state */
2994 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
2995 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
2996 SCTPDBG(SCTP_DEBUG_INPUT2,
2997 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
2998 SCTP_TCB_UNLOCK(stcb);
3001 /* notify upper layer protocol */
3002 if (stcb->sctp_socket) {
3003 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3006 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3007 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3008 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3009 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3012 /* stop the timer */
3013 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3014 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3015 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3017 SCTPDBG(SCTP_DEBUG_INPUT2,
3018 "sctp_handle_shutdown_complete: calls free-asoc\n");
3019 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3020 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3025 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3026 struct sctp_nets *net, uint8_t flg)
3028 switch (desc->chunk_type) {
3031 /* find the tsn to resend (possibly) */
3034 struct sctp_tmit_chunk *tp1;
3036 tsn = ntohl(desc->tsn_ifany);
3037 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3038 if (tp1->rec.data.tsn == tsn) {
3042 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3050 * Do it the other way , aka without paying
3051 * attention to queue seq order.
3053 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3054 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3055 if (tp1->rec.data.tsn == tsn) {
3062 SCTP_STAT_INCR(sctps_pdrptsnnf);
3064 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3065 if (((flg & SCTP_BADCRC) == 0) &&
3066 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3069 if ((stcb->asoc.peers_rwnd == 0) &&
3070 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3071 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3074 if (stcb->asoc.peers_rwnd == 0 &&
3075 (flg & SCTP_FROM_MIDDLE_BOX)) {
3076 SCTP_STAT_INCR(sctps_pdrpdizrw);
3079 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3080 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3081 /* Payload not matching. */
3082 SCTP_STAT_INCR(sctps_pdrpbadd);
3085 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3086 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3087 /* Payload not matching. */
3088 SCTP_STAT_INCR(sctps_pdrpbadd);
3093 * this guy had a RTO calculation
3094 * pending on it, cancel it
3096 if (tp1->whoTo->rto_needed == 0) {
3097 tp1->whoTo->rto_needed = 1;
3101 SCTP_STAT_INCR(sctps_pdrpmark);
3102 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3103 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3105 * mark it as if we were doing a FR, since
3106 * we will be getting gap ack reports behind
3107 * the info from the router.
3109 tp1->rec.data.doing_fast_retransmit = 1;
3111 * mark the tsn with what sequences can
3114 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3115 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3117 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3120 /* restart the timer */
3121 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3123 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3124 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3127 /* fix counts and things */
3128 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3129 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3130 tp1->whoTo->flight_size,
3132 (uint32_t)(uintptr_t)stcb,
3135 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3136 sctp_flight_size_decrease(tp1);
3137 sctp_total_flight_decrease(stcb, tp1);
3139 tp1->sent = SCTP_DATAGRAM_RESEND;
3145 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3146 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3149 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3151 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3154 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3155 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3156 audit, stcb->asoc.sent_queue_retran_cnt);
3157 #ifndef SCTP_AUDITING_ENABLED
3158 stcb->asoc.sent_queue_retran_cnt = audit;
3166 struct sctp_tmit_chunk *asconf;
3168 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3170 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3175 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3176 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3177 asconf->sent = SCTP_DATAGRAM_RESEND;
3178 asconf->snd_count--;
3182 case SCTP_INITIATION:
3183 /* resend the INIT */
3184 stcb->asoc.dropped_special_cnt++;
3185 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3187 * If we can get it in, in a few attempts we do
3188 * this, otherwise we let the timer fire.
3190 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3192 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3193 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3196 case SCTP_SELECTIVE_ACK:
3197 case SCTP_NR_SELECTIVE_ACK:
3198 /* resend the sack */
3199 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3201 case SCTP_HEARTBEAT_REQUEST:
3202 /* resend a demand HB */
3203 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3205 * Only retransmit if we KNOW we wont destroy the
3208 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3212 sctp_send_shutdown(stcb, net);
3214 case SCTP_SHUTDOWN_ACK:
3215 sctp_send_shutdown_ack(stcb, net);
3217 case SCTP_COOKIE_ECHO:
3219 struct sctp_tmit_chunk *cookie;
3222 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3224 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3229 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3230 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3231 cookie->sent = SCTP_DATAGRAM_RESEND;
3232 sctp_stop_all_cookie_timers(stcb);
3236 case SCTP_COOKIE_ACK:
3237 sctp_send_cookie_ack(stcb);
3239 case SCTP_ASCONF_ACK:
3240 /* resend last asconf ack */
3241 sctp_send_asconf_ack(stcb);
3243 case SCTP_IFORWARD_CUM_TSN:
3244 case SCTP_FORWARD_CUM_TSN:
3245 send_forward_tsn(stcb, &stcb->asoc);
3247 /* can't do anything with these */
3248 case SCTP_PACKET_DROPPED:
3249 case SCTP_INITIATION_ACK: /* this should not happen */
3250 case SCTP_HEARTBEAT_ACK:
3251 case SCTP_ABORT_ASSOCIATION:
3252 case SCTP_OPERATION_ERROR:
3253 case SCTP_SHUTDOWN_COMPLETE:
3263 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3269 * We set things to 0xffffffff since this is the last delivered
3270 * sequence and we will be sending in 0 after the reset.
3273 if (number_entries) {
3274 for (i = 0; i < number_entries; i++) {
3275 temp = ntohs(list[i]);
3276 if (temp >= stcb->asoc.streamincnt) {
3279 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3283 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3284 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3287 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3291 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3296 if (number_entries > 0) {
3297 for (i = 0; i < number_entries; i++) {
3298 temp = ntohs(list[i]);
3299 if (temp >= stcb->asoc.streamoutcnt) {
3300 /* no such stream */
3303 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3304 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3307 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3308 stcb->asoc.strmout[i].next_mid_ordered = 0;
3309 stcb->asoc.strmout[i].next_mid_unordered = 0;
3312 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3316 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3321 if (number_entries > 0) {
3322 for (i = 0; i < number_entries; i++) {
3323 temp = ntohs(list[i]);
3324 if (temp >= stcb->asoc.streamoutcnt) {
3325 /* no such stream */
3328 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3331 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3332 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3337 struct sctp_stream_reset_request *
3338 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3340 struct sctp_association *asoc;
3341 struct sctp_chunkhdr *ch;
3342 struct sctp_stream_reset_request *r;
3343 struct sctp_tmit_chunk *chk;
3347 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3348 asoc->stream_reset_outstanding = 0;
3351 if (stcb->asoc.str_reset == NULL) {
3352 asoc->stream_reset_outstanding = 0;
3355 chk = stcb->asoc.str_reset;
3356 if (chk->data == NULL) {
3360 /* he wants a copy of the chk pointer */
3363 clen = chk->send_size;
3364 ch = mtod(chk->data, struct sctp_chunkhdr *);
3365 r = (struct sctp_stream_reset_request *)(ch + 1);
3366 if (ntohl(r->request_seq) == seq) {
3370 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3371 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3372 /* move to the next one, there can only be a max of two */
3373 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3374 if (ntohl(r->request_seq) == seq) {
3378 /* that seq is not here */
3383 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3385 struct sctp_association *asoc;
3386 struct sctp_tmit_chunk *chk;
3389 chk = asoc->str_reset;
3393 asoc->str_reset = NULL;
3394 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3395 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3396 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3397 asoc->ctrl_queue_cnt--;
3399 sctp_m_freem(chk->data);
3402 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3406 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3407 uint32_t seq, uint32_t action,
3408 struct sctp_stream_reset_response *respin)
3412 struct sctp_association *asoc = &stcb->asoc;
3413 struct sctp_tmit_chunk *chk;
3414 struct sctp_stream_reset_request *req_param;
3415 struct sctp_stream_reset_out_request *req_out_param;
3416 struct sctp_stream_reset_in_request *req_in_param;
3417 uint32_t number_entries;
3419 if (asoc->stream_reset_outstanding == 0) {
3423 if (seq == stcb->asoc.str_reset_seq_out) {
3424 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3425 if (req_param != NULL) {
3426 stcb->asoc.str_reset_seq_out++;
3427 type = ntohs(req_param->ph.param_type);
3428 lparam_len = ntohs(req_param->ph.param_length);
3429 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3432 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3433 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3434 asoc->stream_reset_out_is_outstanding = 0;
3435 if (asoc->stream_reset_outstanding)
3436 asoc->stream_reset_outstanding--;
3437 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3439 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3440 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3441 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3442 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3444 * Set it up so we don't stop
3447 asoc->stream_reset_outstanding++;
3448 stcb->asoc.str_reset_seq_out--;
3449 asoc->stream_reset_out_is_outstanding = 1;
3452 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3454 if (no_clear == 0) {
3455 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3457 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3458 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3459 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3460 if (asoc->stream_reset_outstanding)
3461 asoc->stream_reset_outstanding--;
3462 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3463 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3464 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3465 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3466 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3467 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3469 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3470 /* Ok we now may have more streams */
3473 num_stream = stcb->asoc.strm_pending_add_size;
3474 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3476 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3478 stcb->asoc.strm_pending_add_size = 0;
3479 if (asoc->stream_reset_outstanding)
3480 asoc->stream_reset_outstanding--;
3481 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3482 /* Put the new streams into effect */
3485 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3486 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3488 asoc->streamoutcnt += num_stream;
3489 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3490 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3491 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3492 SCTP_STREAM_CHANGE_DENIED);
3494 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3495 SCTP_STREAM_CHANGE_FAILED);
3497 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3498 if (asoc->stream_reset_outstanding)
3499 asoc->stream_reset_outstanding--;
3500 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3501 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3502 SCTP_STREAM_CHANGE_DENIED);
3503 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3504 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3505 SCTP_STREAM_CHANGE_FAILED);
3507 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3509 * a) Adopt the new in tsn.
3511 * c) Adopt the new out-tsn
3513 struct sctp_stream_reset_response_tsn *resp;
3514 struct sctp_forward_tsn_chunk fwdtsn;
3517 if (respin == NULL) {
3521 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3524 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3525 resp = (struct sctp_stream_reset_response_tsn *)respin;
3526 asoc->stream_reset_outstanding--;
3527 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3528 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3529 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3530 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3534 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3535 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3536 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3539 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3540 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3541 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3543 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3544 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3546 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3547 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3549 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3550 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3551 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3552 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3553 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3554 SCTP_ASSOC_RESET_DENIED);
3556 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3557 SCTP_ASSOC_RESET_FAILED);
3560 /* get rid of the request and get the request flags */
3561 if (asoc->stream_reset_outstanding == 0) {
3562 sctp_clean_up_stream_reset(stcb);
3566 if (asoc->stream_reset_outstanding == 0) {
3567 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3573 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3574 struct sctp_tmit_chunk *chk,
3575 struct sctp_stream_reset_in_request *req, int trunc)
3583 * peer wants me to send a str-reset to him for my outgoing seq's if
3586 struct sctp_association *asoc = &stcb->asoc;
3588 seq = ntohl(req->request_seq);
3589 if (asoc->str_reset_seq_in == seq) {
3590 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3591 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3592 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3594 /* Can't do it, since they exceeded our buffer size */
3595 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3596 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3597 len = ntohs(req->ph.param_length);
3598 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3599 if (number_entries) {
3600 for (i = 0; i < number_entries; i++) {
3601 temp = ntohs(req->list_of_streams[i]);
3602 if (temp >= stcb->asoc.streamoutcnt) {
3603 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3606 req->list_of_streams[i] = temp;
3608 for (i = 0; i < number_entries; i++) {
3609 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3610 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3615 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3616 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3617 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3620 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3622 /* Can't do it, since we have sent one out */
3623 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3626 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3627 asoc->str_reset_seq_in++;
3628 } else if (asoc->str_reset_seq_in - 1 == seq) {
3629 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3630 } else if (asoc->str_reset_seq_in - 2 == seq) {
3631 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3633 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3635 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3639 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3640 struct sctp_tmit_chunk *chk,
3641 struct sctp_stream_reset_tsn_request *req)
3643 /* reset all in and out and update the tsn */
3645 * A) reset my str-seq's on in and out. B) Select a receive next,
3646 * and set cum-ack to it. Also process this selected number as a
3647 * fwd-tsn as well. C) set in the response my next sending seq.
3649 struct sctp_forward_tsn_chunk fwdtsn;
3650 struct sctp_association *asoc = &stcb->asoc;
3654 seq = ntohl(req->request_seq);
3655 if (asoc->str_reset_seq_in == seq) {
3656 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3657 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3658 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3660 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3661 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3662 fwdtsn.ch.chunk_flags = 0;
3663 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3664 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3668 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3669 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3670 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3672 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3673 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3674 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3675 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3676 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3677 atomic_add_int(&asoc->sending_seq, 1);
3678 /* save off historical data for retrans */
3679 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3680 asoc->last_sending_seq[0] = asoc->sending_seq;
3681 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3682 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3683 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3684 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3685 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3686 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3688 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3689 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3690 asoc->str_reset_seq_in++;
3691 } else if (asoc->str_reset_seq_in - 1 == seq) {
3692 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3693 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3694 } else if (asoc->str_reset_seq_in - 2 == seq) {
3695 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3696 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3698 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3704 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3705 struct sctp_tmit_chunk *chk,
3706 struct sctp_stream_reset_out_request *req, int trunc)
3709 int number_entries, len;
3710 struct sctp_association *asoc = &stcb->asoc;
3712 seq = ntohl(req->request_seq);
3714 /* now if its not a duplicate we process it */
3715 if (asoc->str_reset_seq_in == seq) {
3716 len = ntohs(req->ph.param_length);
3717 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3719 * the sender is resetting, handle the list issue.. we must
3720 * a) verify if we can do the reset, if so no problem b) If
3721 * we can't do the reset we must copy the request. c) queue
3722 * it, and setup the data in processor to trigger it off
3723 * when needed and dequeue all the queued data.
3725 tsn = ntohl(req->send_reset_at_tsn);
3727 /* move the reset action back one */
3728 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3729 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3730 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3732 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3733 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3734 /* we can do it now */
3735 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3736 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3739 * we must queue it up and thus wait for the TSN's
3740 * to arrive that are at or before tsn
3742 struct sctp_stream_reset_list *liste;
3745 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3746 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3747 siz, SCTP_M_STRESET);
3748 if (liste == NULL) {
3749 /* gak out of memory */
3750 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3751 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3756 liste->number_entries = number_entries;
3757 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3758 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3759 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3761 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3762 asoc->str_reset_seq_in++;
3763 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3765 * one seq back, just echo back last action since my
3766 * response was lost.
3768 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3769 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3771 * two seq back, just echo back last action since my
3772 * response was lost.
3774 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3776 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3781 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3782 struct sctp_stream_reset_add_strm *str_add)
3785 * Peer is requesting to add more streams. If its within our
3786 * max-streams we will allow it.
3788 uint32_t num_stream, i;
3790 struct sctp_association *asoc = &stcb->asoc;
3791 struct sctp_queued_to_read *ctl, *nctl;
3793 /* Get the number. */
3794 seq = ntohl(str_add->request_seq);
3795 num_stream = ntohs(str_add->number_of_streams);
3796 /* Now what would be the new total? */
3797 if (asoc->str_reset_seq_in == seq) {
3798 num_stream += stcb->asoc.streamincnt;
3799 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3800 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3801 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3802 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3803 (num_stream > 0xffff)) {
3804 /* We must reject it they ask for to many */
3806 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3808 /* Ok, we can do that :-) */
3809 struct sctp_stream_in *oldstrm;
3811 /* save off the old */
3812 oldstrm = stcb->asoc.strmin;
3813 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3814 (num_stream * sizeof(struct sctp_stream_in)),
3816 if (stcb->asoc.strmin == NULL) {
3817 stcb->asoc.strmin = oldstrm;
3820 /* copy off the old data */
3821 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3822 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3823 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3824 stcb->asoc.strmin[i].sid = i;
3825 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3826 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3827 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3828 /* now anything on those queues? */
3829 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3830 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3831 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3833 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3834 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3835 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3838 /* Init the new streams */
3839 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3840 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3841 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3842 stcb->asoc.strmin[i].sid = i;
3843 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3844 stcb->asoc.strmin[i].pd_api_started = 0;
3845 stcb->asoc.strmin[i].delivery_started = 0;
3847 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3848 /* update the size */
3849 stcb->asoc.streamincnt = num_stream;
3850 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3851 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3853 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3854 asoc->str_reset_seq_in++;
3855 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3857 * one seq back, just echo back last action since my
3858 * response was lost.
3860 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3861 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3863 * two seq back, just echo back last action since my
3864 * response was lost.
3866 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3868 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3873 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3874 struct sctp_stream_reset_add_strm *str_add)
3877 * Peer is requesting to add more streams. If its within our
3878 * max-streams we will allow it.
3880 uint16_t num_stream;
3882 struct sctp_association *asoc = &stcb->asoc;
3884 /* Get the number. */
3885 seq = ntohl(str_add->request_seq);
3886 num_stream = ntohs(str_add->number_of_streams);
3887 /* Now what would be the new total? */
3888 if (asoc->str_reset_seq_in == seq) {
3889 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3890 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3891 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3892 } else if (stcb->asoc.stream_reset_outstanding) {
3893 /* We must reject it we have something pending */
3894 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3896 /* Ok, we can do that :-) */
3899 mychk = stcb->asoc.streamoutcnt;
3900 mychk += num_stream;
3901 if (mychk < 0x10000) {
3902 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3903 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3904 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3907 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3910 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3911 asoc->str_reset_seq_in++;
3912 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3914 * one seq back, just echo back last action since my
3915 * response was lost.
3917 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3918 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3920 * two seq back, just echo back last action since my
3921 * response was lost.
3923 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3925 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3930 __attribute__((noinline))
3933 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3934 struct sctp_chunkhdr *ch_req)
3936 uint16_t remaining_length, param_len, ptype;
3937 struct sctp_paramhdr pstore;
3938 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3942 struct sctp_tmit_chunk *chk;
3943 struct sctp_chunkhdr *ch;
3944 struct sctp_paramhdr *ph;
3948 /* now it may be a reset or a reset-response */
3949 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3951 /* setup for adding the response */
3952 sctp_alloc_a_chunk(stcb, chk);
3956 chk->copy_by_ref = 0;
3957 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
3958 chk->rec.chunk_id.can_take_data = 0;
3960 chk->asoc = &stcb->asoc;
3961 chk->no_fr_allowed = 0;
3962 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
3963 chk->book_size_scale = 0;
3964 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
3965 if (chk->data == NULL) {
3968 sctp_m_freem(chk->data);
3971 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3974 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
3976 /* setup chunk parameters */
3977 chk->sent = SCTP_DATAGRAM_UNSENT;
3981 ch = mtod(chk->data, struct sctp_chunkhdr *);
3982 ch->chunk_type = SCTP_STREAM_RESET;
3983 ch->chunk_flags = 0;
3984 ch->chunk_length = htons(chk->send_size);
3985 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
3986 offset += sizeof(struct sctp_chunkhdr);
3987 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
3988 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
3993 param_len = ntohs(ph->param_length);
3994 if ((param_len > remaining_length) ||
3995 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
3996 /* bad parameter length */
3999 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4000 (uint8_t *)&cstore);
4005 ptype = ntohs(ph->param_type);
4007 if (param_len > sizeof(cstore)) {
4012 if (num_param > SCTP_MAX_RESET_PARAMS) {
4013 /* hit the max of parameters already sorry.. */
4016 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4017 struct sctp_stream_reset_out_request *req_out;
4019 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4022 req_out = (struct sctp_stream_reset_out_request *)ph;
4024 if (stcb->asoc.stream_reset_outstanding) {
4025 seq = ntohl(req_out->response_seq);
4026 if (seq == stcb->asoc.str_reset_seq_out) {
4028 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4031 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4032 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4033 struct sctp_stream_reset_add_strm *str_add;
4035 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4038 str_add = (struct sctp_stream_reset_add_strm *)ph;
4040 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4041 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4042 struct sctp_stream_reset_add_strm *str_add;
4044 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4047 str_add = (struct sctp_stream_reset_add_strm *)ph;
4049 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4050 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4051 struct sctp_stream_reset_in_request *req_in;
4054 req_in = (struct sctp_stream_reset_in_request *)ph;
4055 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4056 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4057 struct sctp_stream_reset_tsn_request *req_tsn;
4060 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4061 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4063 goto strres_nochunk;
4067 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4068 struct sctp_stream_reset_response *resp;
4071 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4074 resp = (struct sctp_stream_reset_response *)ph;
4075 seq = ntohl(resp->response_seq);
4076 result = ntohl(resp->result);
4077 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4079 goto strres_nochunk;
4084 offset += SCTP_SIZE32(param_len);
4085 if (remaining_length >= SCTP_SIZE32(param_len)) {
4086 remaining_length -= SCTP_SIZE32(param_len);
4088 remaining_length = 0;
4092 /* we have no response free the stuff */
4093 goto strres_nochunk;
4095 /* ok we have a chunk to link in */
4096 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4099 stcb->asoc.ctrl_queue_cnt++;
4104 * Handle a router or endpoints report of a packet loss, there are two ways
4105 * to handle this, either we get the whole packet and must disect it
4106 * ourselves (possibly with truncation and or corruption) or it is a summary
4107 * from a middle box that did the disectting for us.
4110 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4111 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4113 struct sctp_chunk_desc desc;
4114 struct sctp_chunkhdr *chk_hdr;
4115 struct sctp_data_chunk *data_chunk;
4116 struct sctp_idata_chunk *idata_chunk;
4117 uint32_t bottle_bw, on_queue;
4118 uint32_t offset, chk_len;
4119 uint16_t pktdrp_len;
4120 uint8_t pktdrp_flags;
4122 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4123 ("PKTDROP chunk too small"));
4124 pktdrp_flags = cp->ch.chunk_flags;
4125 pktdrp_len = ntohs(cp->ch.chunk_length);
4126 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4127 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4128 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4129 /* The peer plays games with us. */
4133 limit -= sizeof(struct sctp_pktdrop_chunk);
4135 if (offset == limit) {
4136 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4137 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4139 } else if (offset + sizeof(struct sctphdr) > limit) {
4140 /* Only a partial SCTP common header. */
4141 SCTP_STAT_INCR(sctps_pdrpcrupt);
4144 /* XXX: Check embedded SCTP common header. */
4145 offset += sizeof(struct sctphdr);
4147 /* Now parse through the chunks themselves. */
4148 while (offset < limit) {
4149 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4150 SCTP_STAT_INCR(sctps_pdrpcrupt);
4153 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4154 desc.chunk_type = chk_hdr->chunk_type;
4155 /* get amount we need to move */
4156 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4157 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4158 /* Someone is lying... */
4161 if (desc.chunk_type == SCTP_DATA) {
4162 if (stcb->asoc.idata_supported) {
4163 /* Some is playing games with us. */
4166 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4167 /* Some is playing games with us. */
4170 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4172 * Not enough data bytes available in the
4175 SCTP_STAT_INCR(sctps_pdrpnedat);
4178 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4179 /* Not enough data in buffer. */
4182 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4183 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4184 desc.tsn_ifany = data_chunk->dp.tsn;
4185 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4186 SCTP_STAT_INCR(sctps_pdrpmbda);
4188 } else if (desc.chunk_type == SCTP_IDATA) {
4189 if (!stcb->asoc.idata_supported) {
4190 /* Some is playing games with us. */
4193 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4194 /* Some is playing games with us. */
4197 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4199 * Not enough data bytes available in the
4202 SCTP_STAT_INCR(sctps_pdrpnedat);
4205 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4206 /* Not enough data in buffer. */
4209 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4210 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4211 desc.tsn_ifany = idata_chunk->dp.tsn;
4212 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4213 SCTP_STAT_INCR(sctps_pdrpmbda);
4216 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4217 SCTP_STAT_INCR(sctps_pdrpmbct);
4220 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4221 SCTP_STAT_INCR(sctps_pdrppdbrk);
4225 offset += SCTP_SIZE32(chk_len);
4227 /* Now update any rwnd --- possibly */
4228 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4229 /* From a peer, we get a rwnd report */
4232 SCTP_STAT_INCR(sctps_pdrpfehos);
4234 bottle_bw = ntohl(cp->bottle_bw);
4235 on_queue = ntohl(cp->current_onq);
4236 if (bottle_bw && on_queue) {
4237 /* a rwnd report is in here */
4238 if (bottle_bw > on_queue)
4239 a_rwnd = bottle_bw - on_queue;
4244 stcb->asoc.peers_rwnd = 0;
4246 if (a_rwnd > stcb->asoc.total_flight) {
4247 stcb->asoc.peers_rwnd =
4248 a_rwnd - stcb->asoc.total_flight;
4250 stcb->asoc.peers_rwnd = 0;
4252 if (stcb->asoc.peers_rwnd <
4253 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4254 /* SWS sender side engages */
4255 stcb->asoc.peers_rwnd = 0;
4260 SCTP_STAT_INCR(sctps_pdrpfmbox);
4263 /* now middle boxes in sat networks get a cwnd bump */
4264 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4265 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4266 (stcb->asoc.sat_network)) {
4268 * This is debatable but for sat networks it makes sense
4269 * Note if a T3 timer has went off, we will prohibit any
4270 * changes to cwnd until we exit the t3 loss recovery.
4272 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4273 net, cp, &bottle_bw, &on_queue);
4278 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4279 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4280 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4281 * length of the complete packet outputs: - length: modified to remaining
4282 * length after control processing - netp: modified to new sctp_nets after
4283 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4284 * bad packet,...) otherwise return the tcb for this packet
4287 __attribute__((noinline))
4289 static struct sctp_tcb *
4290 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4291 struct sockaddr *src, struct sockaddr *dst,
4292 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4293 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4294 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4295 uint32_t vrf_id, uint16_t port)
4297 struct sctp_association *asoc;
4298 struct mbuf *op_err;
4299 char msg[SCTP_DIAG_INFO_LEN];
4301 int num_chunks = 0; /* number of control chunks processed */
4302 uint32_t chk_length, contiguous;
4304 int abort_no_unlock = 0;
4308 * How big should this be, and should it be alloc'd? Lets try the
4309 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4310 * until we get into jumbo grams and such..
4312 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4314 uint32_t auth_offset = 0, auth_len = 0;
4315 int auth_skipped = 0;
4318 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4319 iphlen, *offset, length, (void *)stcb);
4322 SCTP_TCB_LOCK_ASSERT(stcb);
4324 /* validate chunk header length... */
4325 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4326 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4327 ntohs(ch->chunk_length));
4332 * validate the verification tag
4334 vtag_in = ntohl(sh->v_tag);
4336 if (ch->chunk_type == SCTP_INITIATION) {
4337 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4338 ntohs(ch->chunk_length), vtag_in);
4340 /* protocol error- silently discard... */
4341 SCTP_STAT_INCR(sctps_badvtag);
4343 SCTP_TCB_UNLOCK(stcb);
4347 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4349 * If there is no stcb, skip the AUTH chunk and process
4350 * later after a stcb is found (to validate the lookup was
4353 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4355 (inp->auth_supported == 1)) {
4356 /* save this chunk for later processing */
4358 auth_offset = *offset;
4359 auth_len = ntohs(ch->chunk_length);
4361 /* (temporarily) move past this chunk */
4362 *offset += SCTP_SIZE32(auth_len);
4363 if (*offset >= length) {
4364 /* no more data left in the mbuf chain */
4368 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4369 sizeof(struct sctp_chunkhdr), chunk_buf);
4376 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4377 goto process_control_chunks;
4380 * first check if it's an ASCONF with an unknown src addr we
4381 * need to look inside to find the association
4383 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4384 struct sctp_chunkhdr *asconf_ch = ch;
4385 uint32_t asconf_offset = 0, asconf_len = 0;
4387 /* inp's refcount may be reduced */
4388 SCTP_INP_INCR_REF(inp);
4390 asconf_offset = *offset;
4392 asconf_len = ntohs(asconf_ch->chunk_length);
4393 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4395 stcb = sctp_findassociation_ep_asconf(m,
4398 sh, &inp, netp, vrf_id);
4401 asconf_offset += SCTP_SIZE32(asconf_len);
4402 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4403 sizeof(struct sctp_chunkhdr), chunk_buf);
4404 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4407 * reduce inp's refcount if not reduced in
4408 * sctp_findassociation_ep_asconf().
4410 SCTP_INP_DECR_REF(inp);
4413 /* now go back and verify any auth chunk to be sure */
4414 if (auth_skipped && (stcb != NULL)) {
4415 struct sctp_auth_chunk *auth;
4417 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4418 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4424 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4426 /* auth HMAC failed so dump it */
4430 /* remaining chunks are HMAC checked */
4431 stcb->asoc.authenticated = 1;
4436 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4437 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4439 /* no association, so it's out of the blue... */
4440 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4441 mflowtype, mflowid, inp->fibnum,
4447 /* ABORT and SHUTDOWN can use either v_tag... */
4448 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4449 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4450 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4451 /* Take the T-bit always into account. */
4452 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4453 (vtag_in == asoc->my_vtag)) ||
4454 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4455 (asoc->peer_vtag != htonl(0)) &&
4456 (vtag_in == asoc->peer_vtag))) {
4459 /* drop this packet... */
4460 SCTP_STAT_INCR(sctps_badvtag);
4462 SCTP_TCB_UNLOCK(stcb);
4466 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4467 if (vtag_in != asoc->my_vtag) {
4469 * this could be a stale SHUTDOWN-ACK or the
4470 * peer never got the SHUTDOWN-COMPLETE and
4471 * is still hung; we have started a new asoc
4472 * but it won't complete until the shutdown
4476 SCTP_TCB_UNLOCK(stcb);
4478 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4479 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4481 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4483 mflowtype, mflowid, fibnum,
4488 /* for all other chunks, vtag must match */
4489 if (vtag_in != asoc->my_vtag) {
4490 /* invalid vtag... */
4491 SCTPDBG(SCTP_DEBUG_INPUT3,
4492 "invalid vtag: %xh, expect %xh\n",
4493 vtag_in, asoc->my_vtag);
4494 SCTP_STAT_INCR(sctps_badvtag);
4496 SCTP_TCB_UNLOCK(stcb);
4502 } /* end if !SCTP_COOKIE_ECHO */
4504 * process all control chunks...
4506 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4507 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4508 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4509 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4510 /* implied cookie-ack.. we must have lost the ack */
4511 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4515 process_control_chunks:
4516 while (IS_SCTP_CONTROL(ch)) {
4517 /* validate chunk length */
4518 chk_length = ntohs(ch->chunk_length);
4519 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4520 ch->chunk_type, chk_length);
4521 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4522 if (chk_length < sizeof(*ch) ||
4523 (*offset + (int)chk_length) > length) {
4527 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4529 * INIT and INIT-ACK only gets the init ack "header" portion
4530 * only because we don't have to process the peer's COOKIE.
4531 * All others get a complete chunk.
4533 switch (ch->chunk_type) {
4534 case SCTP_INITIATION:
4535 contiguous = sizeof(struct sctp_init_chunk);
4537 case SCTP_INITIATION_ACK:
4538 contiguous = sizeof(struct sctp_init_ack_chunk);
4541 contiguous = min(chk_length, sizeof(chunk_buf));
4544 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4550 SCTP_TCB_UNLOCK(stcb);
4556 /* Save off the last place we got a control from */
4558 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4560 * allow last_control to be NULL if
4561 * ASCONF... ASCONF processing will find the
4564 if ((netp != NULL) && (*netp != NULL))
4565 stcb->asoc.last_control_chunk_from = *netp;
4568 #ifdef SCTP_AUDITING_ENABLED
4569 sctp_audit_log(0xB0, ch->chunk_type);
4572 /* check to see if this chunk required auth, but isn't */
4573 if ((stcb != NULL) &&
4574 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4575 !stcb->asoc.authenticated) {
4576 /* "silently" ignore */
4577 SCTP_STAT_INCR(sctps_recvauthmissing);
4580 switch (ch->chunk_type) {
4581 case SCTP_INITIATION:
4582 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4583 /* The INIT chunk must be the only chunk. */
4584 if ((num_chunks > 1) ||
4585 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4586 /* RFC 4960 requires that no ABORT is sent */
4589 SCTP_TCB_UNLOCK(stcb);
4593 /* Honor our resource limit. */
4594 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4595 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4596 sctp_abort_association(inp, stcb, m, iphlen,
4597 src, dst, sh, op_err,
4603 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4604 (struct sctp_init_chunk *)ch, inp,
4605 stcb, *netp, &abort_no_unlock,
4609 if ((!abort_no_unlock) && (stcb != NULL)) {
4610 SCTP_TCB_UNLOCK(stcb);
4614 case SCTP_PAD_CHUNK:
4616 case SCTP_INITIATION_ACK:
4617 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4618 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4619 /* We are not interested anymore */
4620 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4625 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4626 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4631 /* The INIT-ACK chunk must be the only chunk. */
4632 if ((num_chunks > 1) ||
4633 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4637 if ((netp != NULL) && (*netp != NULL)) {
4638 ret = sctp_handle_init_ack(m, iphlen, *offset,
4640 (struct sctp_init_ack_chunk *)ch,
4649 if (abort_no_unlock) {
4653 * Special case, I must call the output routine to
4654 * get the cookie echoed
4656 if ((stcb != NULL) && (ret == 0)) {
4657 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4661 case SCTP_SELECTIVE_ACK:
4662 case SCTP_NR_SELECTIVE_ACK:
4665 uint32_t a_rwnd, cum_ack;
4666 uint16_t num_seg, num_nr_seg, num_dup;
4668 int offset_seg, offset_dup;
4670 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4671 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4672 SCTP_STAT_INCR(sctps_recvsacks);
4674 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4675 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4678 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4679 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4680 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4684 if (stcb->asoc.nrsack_supported == 0) {
4687 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4688 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4692 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4694 * If we have sent a shutdown-ack, we will pay no
4695 * attention to a sack sent in to us since
4696 * we don't care anymore.
4700 flags = ch->chunk_flags;
4701 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4702 struct sctp_sack_chunk *sack;
4704 sack = (struct sctp_sack_chunk *)ch;
4705 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4706 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4708 num_dup = ntohs(sack->sack.num_dup_tsns);
4709 a_rwnd = ntohl(sack->sack.a_rwnd);
4710 if (sizeof(struct sctp_sack_chunk) +
4711 num_seg * sizeof(struct sctp_gap_ack_block) +
4712 num_dup * sizeof(uint32_t) != chk_length) {
4713 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4716 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4717 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4719 struct sctp_nr_sack_chunk *nr_sack;
4721 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4722 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4723 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4724 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4725 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4726 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4727 if (sizeof(struct sctp_nr_sack_chunk) +
4728 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4729 num_dup * sizeof(uint32_t) != chk_length) {
4730 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4733 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4734 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4736 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4737 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4738 cum_ack, num_seg, a_rwnd);
4739 stcb->asoc.seen_a_sack_this_pkt = 1;
4740 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4741 (num_seg == 0) && (num_nr_seg == 0) &&
4742 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4743 (stcb->asoc.saw_sack_with_frags == 0) &&
4744 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4745 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4747 * We have a SIMPLE sack having no
4748 * prior segments and data on sent
4749 * queue to be acked. Use the faster
4750 * path sack processing. We also
4751 * allow window update sacks with no
4752 * missing segments to go this way
4755 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4756 &abort_now, ecne_seen);
4758 if ((netp != NULL) && (*netp != NULL)) {
4759 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4760 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4761 cum_ack, a_rwnd, ecne_seen);
4765 /* ABORT signal from sack processing */
4769 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4770 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4771 (stcb->asoc.stream_queue_cnt == 0)) {
4772 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4776 case SCTP_HEARTBEAT_REQUEST:
4777 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4778 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4779 SCTP_STAT_INCR(sctps_recvheartbeat);
4780 sctp_send_heartbeat_ack(stcb, m, *offset,
4784 case SCTP_HEARTBEAT_ACK:
4785 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4786 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4791 SCTP_STAT_INCR(sctps_recvheartbeatack);
4792 if ((netp != NULL) && (*netp != NULL)) {
4793 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4797 case SCTP_ABORT_ASSOCIATION:
4798 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4801 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4802 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4812 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4814 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4818 if ((netp != NULL) && (*netp != NULL)) {
4821 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4822 stcb, *netp, &abort_flag);
4829 case SCTP_SHUTDOWN_ACK:
4830 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4831 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4832 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4837 case SCTP_OPERATION_ERROR:
4838 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4839 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4840 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4845 case SCTP_COOKIE_ECHO:
4846 SCTPDBG(SCTP_DEBUG_INPUT3,
4847 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4848 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4851 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4852 /* We are not interested anymore */
4855 SCTP_TCB_UNLOCK(stcb);
4862 * First are we accepting? We do this again here
4863 * since it is possible that a previous endpoint WAS
4864 * listening responded to a INIT-ACK and then
4865 * closed. We opened and bound.. and are now no
4868 * XXXGL: notes on checking listen queue length.
4869 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4870 * SOLISTENING(), because a listening "UDP type"
4871 * socket isn't listening in terms of the socket
4872 * layer. It is a normal data flow socket, that
4873 * can fork off new connections. Thus, we should
4874 * look into sol_qlen only in case we are !UDP.
4875 * 2) Checking sol_qlen in general requires locking
4876 * the socket, and this code lacks that.
4878 if ((stcb == NULL) &&
4879 (!SCTP_IS_LISTENING(inp) ||
4880 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
4881 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4882 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4883 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4884 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4885 sctp_abort_association(inp, stcb, m, iphlen,
4886 src, dst, sh, op_err,
4893 struct mbuf *ret_buf;
4894 struct sctp_inpcb *linp;
4895 struct sctp_tmit_chunk *chk;
4904 SCTP_ASOC_CREATE_LOCK(linp);
4905 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
4906 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4907 SCTP_ASOC_CREATE_UNLOCK(linp);
4913 struct sctp_tcb *locked_stcb;
4917 sctp_handle_cookie_echo(m, iphlen,
4921 (struct sctp_cookie_echo_chunk *)ch,
4931 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4932 SCTP_TCB_UNLOCK(locked_stcb);
4935 SCTP_TCB_LOCK_ASSERT(stcb);
4941 SCTP_ASOC_CREATE_UNLOCK(linp);
4943 if (ret_buf == NULL) {
4945 SCTP_TCB_UNLOCK(stcb);
4947 SCTPDBG(SCTP_DEBUG_INPUT3,
4948 "GAK, null buffer\n");
4952 /* if AUTH skipped, see if it verified... */
4957 /* Restart the timer if we have pending data */
4958 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4959 if (chk->whoTo != NULL) {
4964 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4968 case SCTP_COOKIE_ACK:
4969 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4970 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4973 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4974 /* We are not interested anymore */
4975 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4978 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4979 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
4984 if ((netp != NULL) && (*netp != NULL)) {
4985 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
4989 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
4990 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
4995 if (stcb->asoc.ecn_supported == 0) {
4998 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5002 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5003 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5007 if (stcb->asoc.ecn_supported == 0) {
5010 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5012 case SCTP_SHUTDOWN_COMPLETE:
5013 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5014 /* must be first and only chunk */
5015 if ((num_chunks > 1) ||
5016 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5020 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5021 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5028 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5030 if (stcb->asoc.asconf_supported == 0) {
5033 sctp_handle_asconf(m, *offset, src,
5034 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5038 case SCTP_ASCONF_ACK:
5039 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5040 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5045 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5046 if (stcb->asoc.asconf_supported == 0) {
5049 /* He's alive so give him credit */
5050 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5051 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5052 stcb->asoc.overall_error_count,
5054 SCTP_FROM_SCTP_INPUT,
5057 stcb->asoc.overall_error_count = 0;
5058 sctp_handle_asconf_ack(m, *offset,
5059 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5060 if (abort_no_unlock)
5064 case SCTP_FORWARD_CUM_TSN:
5065 case SCTP_IFORWARD_CUM_TSN:
5066 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5067 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5068 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5077 if (stcb->asoc.prsctp_supported == 0) {
5080 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5081 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5082 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5083 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5085 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5087 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5088 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
5093 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5094 /* We are not interested anymore */
5095 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5096 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5101 * For sending a SACK this looks like DATA
5104 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5105 sctp_handle_forward_tsn(stcb,
5106 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5113 case SCTP_STREAM_RESET:
5114 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5115 if ((stcb == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req))) {
5120 if (stcb->asoc.reconfig_supported == 0) {
5123 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5124 /* stop processing */
5129 case SCTP_PACKET_DROPPED:
5130 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5131 /* re-get it all please */
5132 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5138 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5139 if (stcb->asoc.pktdrop_supported == 0) {
5142 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5144 min(chk_length, contiguous));
5147 case SCTP_AUTHENTICATION:
5148 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5150 /* save the first AUTH for later processing */
5151 if (auth_skipped == 0) {
5152 auth_offset = *offset;
5153 auth_len = chk_length;
5156 /* skip this chunk (temporarily) */
5159 if (stcb->asoc.auth_supported == 0) {
5162 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5163 (chk_length > (sizeof(struct sctp_auth_chunk) +
5164 SCTP_AUTH_DIGEST_LEN_MAX))) {
5169 if (got_auth == 1) {
5170 /* skip this chunk... it's already auth'd */
5174 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5175 /* auth HMAC failed so dump the packet */
5179 /* remaining chunks are HMAC checked */
5180 stcb->asoc.authenticated = 1;
5186 /* it's an unknown chunk! */
5187 if ((ch->chunk_type & 0x40) &&
5189 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5190 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5191 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5192 struct sctp_gen_error_cause *cause;
5195 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5196 0, M_NOWAIT, 1, MT_DATA);
5197 if (op_err != NULL) {
5198 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5199 cause = mtod(op_err, struct sctp_gen_error_cause *);
5200 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5201 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5202 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5203 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5204 if (SCTP_BUF_NEXT(op_err) != NULL) {
5205 #ifdef SCTP_MBUF_LOGGING
5206 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5207 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5210 sctp_queue_op_err(stcb, op_err);
5212 sctp_m_freem(op_err);
5216 if ((ch->chunk_type & 0x80) == 0) {
5217 /* discard this packet */
5220 } /* else skip this bad chunk and continue... */
5222 } /* switch (ch->chunk_type) */
5225 /* get the next chunk */
5226 *offset += SCTP_SIZE32(chk_length);
5227 if (*offset >= length) {
5228 /* no more data left in the mbuf chain */
5231 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5232 sizeof(struct sctp_chunkhdr), chunk_buf);
5239 if ((asconf_cnt > 0) && (stcb != NULL)) {
5240 sctp_send_asconf_ack(stcb);
5246 * common input chunk processing (v4 and v6)
5249 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5250 struct sockaddr *src, struct sockaddr *dst,
5251 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5252 uint8_t compute_crc,
5254 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5255 uint32_t vrf_id, uint16_t port)
5258 int fwd_tsn_seen = 0, data_processed = 0;
5259 struct mbuf *m = *mm, *op_err;
5260 char msg[SCTP_DIAG_INFO_LEN];
5262 int cnt_ctrl_ready = 0;
5263 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5264 struct sctp_tcb *stcb = NULL;
5265 struct sctp_nets *net = NULL;
5267 SCTP_STAT_INCR(sctps_recvdatagrams);
5268 #ifdef SCTP_AUDITING_ENABLED
5269 sctp_audit_log(0xE0, 1);
5270 sctp_auditing(0, inp, stcb, net);
5272 if (compute_crc != 0) {
5273 uint32_t check, calc_check;
5275 check = sh->checksum;
5277 calc_check = sctp_calculate_cksum(m, iphlen);
5278 sh->checksum = check;
5279 if (calc_check != check) {
5280 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5281 calc_check, check, (void *)m, length, iphlen);
5282 stcb = sctp_findassociation_addr(m, offset, src, dst,
5283 sh, ch, &inp, &net, vrf_id);
5284 #if defined(INET) || defined(INET6)
5285 if ((ch->chunk_type != SCTP_INITIATION) &&
5286 (net != NULL) && (net->port != port)) {
5287 if (net->port == 0) {
5288 /* UDP encapsulation turned on. */
5289 net->mtu -= sizeof(struct udphdr);
5290 if (stcb->asoc.smallest_mtu > net->mtu) {
5291 sctp_pathmtu_adjustment(stcb, net->mtu);
5293 } else if (port == 0) {
5294 /* UDP encapsulation turned off. */
5295 net->mtu += sizeof(struct udphdr);
5296 /* XXX Update smallest_mtu */
5302 net->flowtype = mflowtype;
5303 net->flowid = mflowid;
5305 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5306 if ((inp != NULL) && (stcb != NULL)) {
5307 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5308 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5309 } else if ((inp != NULL) && (stcb == NULL)) {
5312 SCTP_STAT_INCR(sctps_badsum);
5313 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5317 /* Destination port of 0 is illegal, based on RFC4960. */
5318 if (sh->dest_port == 0) {
5319 SCTP_STAT_INCR(sctps_hdrops);
5322 stcb = sctp_findassociation_addr(m, offset, src, dst,
5323 sh, ch, &inp, &net, vrf_id);
5324 #if defined(INET) || defined(INET6)
5325 if ((ch->chunk_type != SCTP_INITIATION) &&
5326 (net != NULL) && (net->port != port)) {
5327 if (net->port == 0) {
5328 /* UDP encapsulation turned on. */
5329 net->mtu -= sizeof(struct udphdr);
5330 if (stcb->asoc.smallest_mtu > net->mtu) {
5331 sctp_pathmtu_adjustment(stcb, net->mtu);
5333 } else if (port == 0) {
5334 /* UDP encapsulation turned off. */
5335 net->mtu += sizeof(struct udphdr);
5336 /* XXX Update smallest_mtu */
5342 net->flowtype = mflowtype;
5343 net->flowid = mflowid;
5346 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5347 SCTP_STAT_INCR(sctps_noport);
5348 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5351 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5352 sctp_send_shutdown_complete2(src, dst, sh,
5353 mflowtype, mflowid, fibnum,
5357 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5360 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5361 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5362 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5363 (ch->chunk_type != SCTP_INIT))) {
5364 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5366 sctp_send_abort(m, iphlen, src, dst,
5368 mflowtype, mflowid, fibnum,
5373 } else if (stcb == NULL) {
5376 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5377 (void *)m, iphlen, offset, length, (void *)stcb);
5379 /* always clear this before beginning a packet */
5380 stcb->asoc.authenticated = 0;
5381 stcb->asoc.seen_a_sack_this_pkt = 0;
5382 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5383 (void *)stcb, stcb->asoc.state);
5385 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5386 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5388 * If we hit here, we had a ref count
5389 * up when the assoc was aborted and the
5390 * timer is clearing out the assoc, we should
5391 * NOT respond to any packet.. its OOTB.
5393 SCTP_TCB_UNLOCK(stcb);
5395 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5396 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5397 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5399 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5400 mflowtype, mflowid, inp->fibnum,
5405 if (IS_SCTP_CONTROL(ch)) {
5406 /* process the control portion of the SCTP packet */
5407 /* sa_ignore NO_NULL_CHK */
5408 stcb = sctp_process_control(m, iphlen, &offset, length,
5410 inp, stcb, &net, &fwd_tsn_seen,
5411 mflowtype, mflowid, fibnum,
5415 * This covers us if the cookie-echo was there and
5416 * it changes our INP.
5418 inp = stcb->sctp_ep;
5419 #if defined(INET) || defined(INET6)
5420 if ((ch->chunk_type != SCTP_INITIATION) &&
5421 (net != NULL) && (net->port != port)) {
5422 if (net->port == 0) {
5423 /* UDP encapsulation turned on. */
5424 net->mtu -= sizeof(struct udphdr);
5425 if (stcb->asoc.smallest_mtu > net->mtu) {
5426 sctp_pathmtu_adjustment(stcb, net->mtu);
5428 } else if (port == 0) {
5429 /* UDP encapsulation turned off. */
5430 net->mtu += sizeof(struct udphdr);
5431 /* XXX Update smallest_mtu */
5439 * no control chunks, so pre-process DATA chunks (these
5440 * checks are taken care of by control processing)
5444 * if DATA only packet, and auth is required, then punt...
5445 * can't have authenticated without any AUTH (control)
5448 if ((stcb != NULL) &&
5449 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5450 /* "silently" ignore */
5451 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5452 SCTP_STAT_INCR(sctps_recvauthmissing);
5456 /* out of the blue DATA chunk */
5457 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5458 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5459 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5461 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5462 mflowtype, mflowid, fibnum,
5466 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5467 /* v_tag mismatch! */
5468 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5469 SCTP_STAT_INCR(sctps_badvtag);
5474 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5477 * no valid TCB for this packet, or we found it's a bad
5478 * packet while processing control, or we're done with this
5479 * packet (done or skip rest of data), so we drop it...
5485 * DATA chunk processing
5487 /* plow through the data chunks while length > offset */
5490 * Rest should be DATA only. Check authentication state if AUTH for
5493 if ((length > offset) &&
5495 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5496 !stcb->asoc.authenticated) {
5497 /* "silently" ignore */
5498 SCTP_STAT_INCR(sctps_recvauthmissing);
5499 SCTPDBG(SCTP_DEBUG_AUTH1,
5500 "Data chunk requires AUTH, skipped\n");
5503 if (length > offset) {
5507 * First check to make sure our state is correct. We would
5508 * not get here unless we really did have a tag, so we don't
5509 * abort if this happens, just dump the chunk silently.
5511 switch (SCTP_GET_STATE(stcb)) {
5512 case SCTP_STATE_COOKIE_ECHOED:
5514 * we consider data with valid tags in this state
5515 * shows us the cookie-ack was lost. Imply it was
5518 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5520 case SCTP_STATE_COOKIE_WAIT:
5522 * We consider OOTB any data sent during asoc setup.
5524 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5525 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5527 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5528 mflowtype, mflowid, inp->fibnum,
5531 /* sa_ignore NOTREACHED */
5533 case SCTP_STATE_EMPTY: /* should not happen */
5534 case SCTP_STATE_INUSE: /* should not happen */
5535 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5536 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5539 /* sa_ignore NOTREACHED */
5541 case SCTP_STATE_OPEN:
5542 case SCTP_STATE_SHUTDOWN_SENT:
5545 /* plow through the data chunks while length > offset */
5546 retval = sctp_process_data(mm, iphlen, &offset, length,
5547 inp, stcb, net, &high_tsn);
5550 * The association aborted, NO UNLOCK needed since
5551 * the association is destroyed.
5560 * Anything important needs to have been m_copy'ed in
5565 /* take care of ecn */
5566 if ((data_processed == 1) &&
5567 (stcb->asoc.ecn_supported == 1) &&
5568 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5569 /* Yep, we need to add a ECNE */
5570 sctp_send_ecn_echo(stcb, net, high_tsn);
5573 if ((data_processed == 0) && (fwd_tsn_seen)) {
5575 uint32_t highest_tsn;
5577 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5578 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5580 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5582 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5583 stcb->asoc.send_sack = 1;
5584 sctp_sack_check(stcb, was_a_gap);
5585 } else if (fwd_tsn_seen) {
5586 stcb->asoc.send_sack = 1;
5588 /* trigger send of any chunks in queue... */
5590 #ifdef SCTP_AUDITING_ENABLED
5591 sctp_audit_log(0xE0, 2);
5592 sctp_auditing(1, inp, stcb, net);
5594 SCTPDBG(SCTP_DEBUG_INPUT1,
5595 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5596 stcb->asoc.peers_rwnd,
5597 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5598 stcb->asoc.total_flight);
5599 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5600 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5601 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5603 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5605 stcb->asoc.trigger_reset ||
5607 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5608 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5609 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5610 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5612 #ifdef SCTP_AUDITING_ENABLED
5613 sctp_audit_log(0xE0, 3);
5614 sctp_auditing(2, inp, stcb, net);
5618 SCTP_TCB_UNLOCK(stcb);
5620 if (inp_decr != NULL) {
5621 /* reduce ref-count */
5622 SCTP_INP_WLOCK(inp_decr);
5623 SCTP_INP_DECR_REF(inp_decr);
5624 SCTP_INP_WUNLOCK(inp_decr);
5631 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5635 uint32_t vrf_id = 0;
5637 struct sockaddr_in src, dst;
5640 struct sctp_chunkhdr *ch;
5642 uint8_t compute_crc;
5648 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5649 SCTP_RELEASE_PKT(i_pak);
5652 m = SCTP_HEADER_TO_CHAIN(i_pak);
5653 #ifdef SCTP_MBUF_LOGGING
5654 /* Log in any input mbufs */
5655 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5656 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5659 #ifdef SCTP_PACKET_LOGGING
5660 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5664 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5665 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5667 if_name(m->m_pkthdr.rcvif),
5668 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5669 mflowid = m->m_pkthdr.flowid;
5670 mflowtype = M_HASHTYPE_GET(m);
5671 fibnum = M_GETFIB(m);
5672 SCTP_STAT_INCR(sctps_recvpackets);
5673 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5674 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5675 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5676 if (SCTP_BUF_LEN(m) < offset) {
5677 if ((m = m_pullup(m, offset)) == NULL) {
5678 SCTP_STAT_INCR(sctps_hdrops);
5682 ip = mtod(m, struct ip *);
5683 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5684 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5685 offset -= sizeof(struct sctp_chunkhdr);
5686 memset(&src, 0, sizeof(struct sockaddr_in));
5687 src.sin_family = AF_INET;
5688 src.sin_len = sizeof(struct sockaddr_in);
5689 src.sin_port = sh->src_port;
5690 src.sin_addr = ip->ip_src;
5691 memset(&dst, 0, sizeof(struct sockaddr_in));
5692 dst.sin_family = AF_INET;
5693 dst.sin_len = sizeof(struct sockaddr_in);
5694 dst.sin_port = sh->dest_port;
5695 dst.sin_addr = ip->ip_dst;
5696 length = ntohs(ip->ip_len);
5697 /* Validate mbuf chain length with IP payload length. */
5698 if (SCTP_HEADER_LEN(m) != length) {
5699 SCTPDBG(SCTP_DEBUG_INPUT1,
5700 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5701 SCTP_STAT_INCR(sctps_hdrops);
5704 /* SCTP does not allow broadcasts or multicasts */
5705 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5708 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5711 ecn_bits = ip->ip_tos;
5712 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5713 SCTP_STAT_INCR(sctps_recvhwcrc);
5716 SCTP_STAT_INCR(sctps_recvswcrc);
5719 sctp_common_input_processing(&m, iphlen, offset, length,
5720 (struct sockaddr *)&src,
5721 (struct sockaddr *)&dst,
5725 mflowtype, mflowid, fibnum,
5734 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5735 extern int *sctp_cpuarry;
5739 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5746 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5752 uint32_t flowid, tag;
5754 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5755 flowid = m->m_pkthdr.flowid;
5758 * No flow id built by lower layers fix it so we
5761 offset = off + sizeof(struct sctphdr);
5762 if (SCTP_BUF_LEN(m) < offset) {
5763 if ((m = m_pullup(m, offset)) == NULL) {
5764 SCTP_STAT_INCR(sctps_hdrops);
5765 return (IPPROTO_DONE);
5768 ip = mtod(m, struct ip *);
5769 sh = (struct sctphdr *)((caddr_t)ip + off);
5770 tag = htonl(sh->v_tag);
5771 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5772 m->m_pkthdr.flowid = flowid;
5773 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5775 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5776 sctp_queue_to_mcore(m, off, cpu_to_use);
5777 return (IPPROTO_DONE);
5780 sctp_input_with_port(m, off, 0);
5781 return (IPPROTO_DONE);