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 = ntohs(initack_cp->init.num_outbound_streams);
1834 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1835 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1836 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1837 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1838 asoc->str_reset_seq_in = asoc->init_seq_number;
1839 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1840 asoc->send_sack = 1;
1841 if (asoc->mapping_array) {
1842 memset(asoc->mapping_array, 0,
1843 asoc->mapping_array_size);
1845 if (asoc->nr_mapping_array) {
1846 memset(asoc->nr_mapping_array, 0,
1847 asoc->mapping_array_size);
1849 SCTP_TCB_UNLOCK(stcb);
1850 SCTP_INP_INFO_WLOCK();
1851 SCTP_INP_WLOCK(stcb->sctp_ep);
1852 SCTP_TCB_LOCK(stcb);
1853 atomic_add_int(&stcb->asoc.refcnt, -1);
1854 /* send up all the data */
1855 SCTP_TCB_SEND_LOCK(stcb);
1857 sctp_report_all_outbound(stcb, 0, SCTP_SO_LOCKED);
1858 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1859 stcb->asoc.strmout[i].chunks_on_queues = 0;
1860 #if defined(SCTP_DETAILED_STR_STATS)
1861 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1862 asoc->strmout[i].abandoned_sent[j] = 0;
1863 asoc->strmout[i].abandoned_unsent[j] = 0;
1866 asoc->strmout[i].abandoned_sent[0] = 0;
1867 asoc->strmout[i].abandoned_unsent[0] = 0;
1869 stcb->asoc.strmout[i].sid = i;
1870 stcb->asoc.strmout[i].next_mid_ordered = 0;
1871 stcb->asoc.strmout[i].next_mid_unordered = 0;
1872 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1874 /* process the INIT-ACK info (my info) */
1875 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1876 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1878 /* pull from vtag hash */
1879 LIST_REMOVE(stcb, sctp_asocs);
1880 /* re-insert to new vtag position */
1881 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1882 SCTP_BASE_INFO(hashasocmark))];
1884 * put it in the bucket in the vtag hash of assoc's for the
1887 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1889 SCTP_TCB_SEND_UNLOCK(stcb);
1890 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1891 SCTP_INP_INFO_WUNLOCK();
1892 asoc->total_flight = 0;
1893 asoc->total_flight_count = 0;
1894 /* process the INIT info (peer's info) */
1895 retval = sctp_process_init(init_cp, stcb);
1897 if (how_indx < sizeof(asoc->cookie_how))
1898 asoc->cookie_how[how_indx] = 13;
1903 * since we did not send a HB make sure we don't double
1906 net->hb_responded = 1;
1908 if (sctp_load_addresses_from_init(stcb, m,
1909 init_offset + sizeof(struct sctp_init_chunk),
1910 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1911 if (how_indx < sizeof(asoc->cookie_how))
1912 asoc->cookie_how[how_indx] = 14;
1916 /* respond with a COOKIE-ACK */
1917 sctp_stop_all_cookie_timers(stcb);
1918 sctp_toss_old_cookies(stcb, asoc);
1919 sctp_send_cookie_ack(stcb);
1920 if (how_indx < sizeof(asoc->cookie_how))
1921 asoc->cookie_how[how_indx] = 15;
1925 if (how_indx < sizeof(asoc->cookie_how))
1926 asoc->cookie_how[how_indx] = 16;
1927 /* all other cases... */
1932 * handle a state cookie for a new association m: input packet mbuf chain--
1933 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
1934 * and the cookie signature does not exist offset: offset into mbuf to the
1935 * cookie-echo chunk length: length of the cookie chunk to: where the init
1936 * was from returns a new TCB
1938 static struct sctp_tcb *
1939 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1940 struct sockaddr *src, struct sockaddr *dst,
1941 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1942 struct sctp_inpcb *inp, struct sctp_nets **netp,
1943 struct sockaddr *init_src, int *notification,
1944 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1945 uint8_t mflowtype, uint32_t mflowid,
1946 uint32_t vrf_id, uint16_t port)
1948 struct sctp_tcb *stcb;
1949 struct sctp_init_chunk *init_cp, init_buf;
1950 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1951 union sctp_sockstore store;
1952 struct sctp_association *asoc;
1953 int init_offset, initack_offset, initack_limit;
1956 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
1959 * find and validate the INIT chunk in the cookie (peer's info) the
1960 * INIT should start after the cookie-echo header struct (chunk
1961 * header, state cookie header struct)
1963 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
1964 init_cp = (struct sctp_init_chunk *)
1965 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1966 (uint8_t *)&init_buf);
1967 if (init_cp == NULL) {
1968 /* could not pull a INIT chunk in cookie */
1969 SCTPDBG(SCTP_DEBUG_INPUT1,
1970 "process_cookie_new: could not pull INIT chunk hdr\n");
1973 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1974 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
1977 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1979 * find and validate the INIT-ACK chunk in the cookie (my info) the
1980 * INIT-ACK follows the INIT chunk
1982 initack_cp = (struct sctp_init_ack_chunk *)
1983 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1984 (uint8_t *)&initack_buf);
1985 if (initack_cp == NULL) {
1986 /* could not pull INIT-ACK chunk in cookie */
1987 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
1990 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1994 * NOTE: We can't use the INIT_ACK's chk_length to determine the
1995 * "initack_limit" value. This is because the chk_length field
1996 * includes the length of the cookie, but the cookie is omitted when
1997 * the INIT and INIT_ACK are tacked onto the cookie...
1999 initack_limit = offset + cookie_len;
2002 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2007 * Here we do a trick, we set in NULL for the proc/thread argument.
2008 * We do this since in effect we only use the p argument when the
2009 * socket is unbound and we must do an implicit bind. Since we are
2010 * getting a cookie, we cannot be unbound.
2012 stcb = sctp_aloc_assoc(inp, init_src, &error,
2013 ntohl(initack_cp->init.initiate_tag), vrf_id,
2014 ntohs(initack_cp->init.num_outbound_streams),
2016 (struct thread *)NULL,
2017 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2019 struct mbuf *op_err;
2021 /* memory problem? */
2022 SCTPDBG(SCTP_DEBUG_INPUT1,
2023 "process_cookie_new: no room for another TCB!\n");
2024 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2025 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2026 src, dst, sh, op_err,
2032 /* get scope variables out of cookie */
2033 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2034 asoc->scope.site_scope = cookie->site_scope;
2035 asoc->scope.local_scope = cookie->local_scope;
2036 asoc->scope.loopback_scope = cookie->loopback_scope;
2038 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2039 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2040 struct mbuf *op_err;
2043 * Houston we have a problem. The EP changed while the
2044 * cookie was in flight. Only recourse is to abort the
2047 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2048 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2049 src, dst, sh, op_err,
2052 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2053 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2056 /* process the INIT-ACK info (my info) */
2057 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2058 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2059 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2060 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2061 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2062 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2063 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2064 asoc->str_reset_seq_in = asoc->init_seq_number;
2066 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2068 /* process the INIT info (peer's info) */
2069 retval = sctp_process_init(init_cp, stcb);
2071 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2072 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2075 /* load all addresses */
2076 if (sctp_load_addresses_from_init(stcb, m,
2077 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2078 src, dst, init_src, port)) {
2079 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2080 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2084 * verify any preceding AUTH chunk that was skipped
2086 /* pull the local authentication parameters from the cookie/init-ack */
2087 sctp_auth_get_cookie_params(stcb, m,
2088 initack_offset + sizeof(struct sctp_init_ack_chunk),
2089 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2091 struct sctp_auth_chunk *auth;
2093 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2094 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2098 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2099 /* auth HMAC failed, dump the assoc and packet */
2100 SCTPDBG(SCTP_DEBUG_AUTH1,
2101 "COOKIE-ECHO: AUTH failed\n");
2102 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2103 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2106 /* remaining chunks checked... good to go */
2107 stcb->asoc.authenticated = 1;
2112 * if we're doing ASCONFs, check to see if we have any new local
2113 * addresses that need to get added to the peer (eg. addresses
2114 * changed while cookie echo in flight). This needs to be done
2115 * after we go to the OPEN state to do the correct asconf
2116 * processing. else, make sure we have the correct addresses in our
2120 /* warning, we re-use sin, sin6, sa_store here! */
2121 /* pull in local_address (our "from" address) */
2122 switch (cookie->laddr_type) {
2124 case SCTP_IPV4_ADDRESS:
2125 /* source addr is IPv4 */
2126 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2127 store.sin.sin_family = AF_INET;
2128 store.sin.sin_len = sizeof(struct sockaddr_in);
2129 store.sin.sin_addr.s_addr = cookie->laddress[0];
2133 case SCTP_IPV6_ADDRESS:
2134 /* source addr is IPv6 */
2135 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2136 store.sin6.sin6_family = AF_INET6;
2137 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2138 store.sin6.sin6_scope_id = cookie->scope_id;
2139 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2143 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2144 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2148 /* update current state */
2149 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2150 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2151 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2152 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2153 stcb->sctp_ep, stcb, NULL);
2155 sctp_stop_all_cookie_timers(stcb);
2156 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2157 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2159 /* set up to notify upper layer */
2160 *notification = SCTP_NOTIFY_ASSOC_UP;
2161 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2162 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2163 (!SCTP_IS_LISTENING(inp))) {
2165 * This is an endpoint that called connect() how it got a
2166 * cookie that is NEW is a bit of a mystery. It must be that
2167 * the INIT was sent, but before it got there.. a complete
2168 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2169 * should have went to the other code.. not here.. oh well..
2170 * a bit of protection is worth having..
2172 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2173 soisconnected(stcb->sctp_socket);
2174 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2175 (SCTP_IS_LISTENING(inp))) {
2177 * We don't want to do anything with this one. Since it is
2178 * the listening guy. The timer will get started for
2179 * accepted connections in the caller.
2183 if (stcb->asoc.sctp_autoclose_ticks &&
2184 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2185 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2187 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2188 *netp = sctp_findnet(stcb, init_src);
2189 if (*netp != NULL) {
2193 * Since we did not send a HB, make sure we don't double
2196 (*netp)->hb_responded = 1;
2197 /* Calculate the RTT. */
2198 old.tv_sec = cookie->time_entered.tv_sec;
2199 old.tv_usec = cookie->time_entered.tv_usec;
2200 sctp_calculate_rto(stcb, asoc, *netp, &old, SCTP_RTT_FROM_NON_DATA);
2202 /* respond with a COOKIE-ACK */
2203 sctp_send_cookie_ack(stcb);
2206 * check the address lists for any ASCONFs that need to be sent
2207 * AFTER the cookie-ack is sent
2209 sctp_check_address_list(stcb, m,
2210 initack_offset + sizeof(struct sctp_init_ack_chunk),
2211 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2212 &store.sa, cookie->local_scope, cookie->site_scope,
2213 cookie->ipv4_scope, cookie->loopback_scope);
2219 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2220 * we NEED to make sure we are not already using the vtag. If so we
2221 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2222 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2223 SCTP_BASE_INFO(hashasocmark))];
2224 LIST_FOREACH(stcb, head, sctp_asocs) {
2225 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2226 -- SEND ABORT - TRY AGAIN --
2232 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2233 * existing (non-NULL) TCB
2235 static struct mbuf *
2236 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2237 struct sockaddr *src, struct sockaddr *dst,
2238 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2239 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2240 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2241 struct sctp_tcb **locked_tcb,
2242 uint8_t mflowtype, uint32_t mflowid,
2243 uint32_t vrf_id, uint16_t port)
2245 struct sctp_state_cookie *cookie;
2246 struct sctp_tcb *l_stcb = *stcb;
2247 struct sctp_inpcb *l_inp;
2248 struct sockaddr *to;
2249 struct sctp_pcb *ep;
2251 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2253 uint8_t cookie_ok = 0;
2254 unsigned int sig_offset, cookie_offset;
2255 unsigned int cookie_len;
2257 struct timeval time_expires;
2258 int notification = 0;
2259 struct sctp_nets *netl;
2260 int had_a_existing_tcb = 0;
2261 int send_int_conf = 0;
2263 struct sockaddr_in sin;
2266 struct sockaddr_in6 sin6;
2269 SCTPDBG(SCTP_DEBUG_INPUT2,
2270 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2272 if (inp_p == NULL) {
2275 cookie = &cp->cookie;
2276 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2277 cookie_len = ntohs(cp->ch.chunk_length);
2279 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2280 sizeof(struct sctp_init_chunk) +
2281 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2282 /* cookie too small */
2285 if ((cookie->peerport != sh->src_port) ||
2286 (cookie->myport != sh->dest_port) ||
2287 (cookie->my_vtag != sh->v_tag)) {
2289 * invalid ports or bad tag. Note that we always leave the
2290 * v_tag in the header in network order and when we stored
2291 * it in the my_vtag slot we also left it in network order.
2292 * This maintains the match even though it may be in the
2293 * opposite byte order of the machine :->
2298 * split off the signature into its own mbuf (since it should not be
2299 * calculated in the sctp_hmac_m() call).
2301 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2302 m_sig = m_split(m, sig_offset, M_NOWAIT);
2303 if (m_sig == NULL) {
2304 /* out of memory or ?? */
2307 #ifdef SCTP_MBUF_LOGGING
2308 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2309 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2314 * compute the signature/digest for the cookie
2316 ep = &(*inp_p)->sctp_ep;
2319 SCTP_TCB_UNLOCK(l_stcb);
2321 SCTP_INP_RLOCK(l_inp);
2323 SCTP_TCB_LOCK(l_stcb);
2325 /* which cookie is it? */
2326 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2327 (ep->current_secret_number != ep->last_secret_number)) {
2328 /* it's the old cookie */
2329 (void)sctp_hmac_m(SCTP_HMAC,
2330 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2331 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2333 /* it's the current cookie */
2334 (void)sctp_hmac_m(SCTP_HMAC,
2335 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2336 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2338 /* get the signature */
2339 SCTP_INP_RUNLOCK(l_inp);
2340 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2342 /* couldn't find signature */
2343 sctp_m_freem(m_sig);
2346 /* compare the received digest with the computed digest */
2347 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2348 /* try the old cookie? */
2349 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2350 (ep->current_secret_number != ep->last_secret_number)) {
2351 /* compute digest with old */
2352 (void)sctp_hmac_m(SCTP_HMAC,
2353 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2354 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2356 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2364 * Now before we continue we must reconstruct our mbuf so that
2365 * normal processing of any other chunks will work.
2371 while (SCTP_BUF_NEXT(m_at) != NULL) {
2372 m_at = SCTP_BUF_NEXT(m_at);
2374 SCTP_BUF_NEXT(m_at) = m_sig;
2377 if (cookie_ok == 0) {
2378 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2379 SCTPDBG(SCTP_DEBUG_INPUT2,
2380 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2381 (uint32_t)offset, cookie_offset, sig_offset);
2386 * check the cookie timestamps to be sure it's not stale
2388 (void)SCTP_GETTIME_TIMEVAL(&now);
2389 /* Expire time is in Ticks, so we convert to seconds */
2390 time_expires.tv_sec = cookie->time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2391 time_expires.tv_usec = cookie->time_entered.tv_usec;
2392 if (timevalcmp(&now, &time_expires, >)) {
2393 /* cookie is stale! */
2394 struct mbuf *op_err;
2395 struct sctp_error_stale_cookie *cause;
2396 struct timeval diff;
2399 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2400 0, M_NOWAIT, 1, MT_DATA);
2401 if (op_err == NULL) {
2406 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2407 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2408 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2409 cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
2410 (sizeof(uint32_t))));
2412 timevalsub(&diff, &time_expires);
2413 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2414 staleness = UINT32_MAX;
2416 staleness = diff.tv_sec * 1000000;
2418 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2419 staleness += diff.tv_usec;
2421 staleness = UINT32_MAX;
2423 cause->stale_time = htonl(staleness);
2424 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2425 mflowtype, mflowid, l_inp->fibnum,
2430 * Now we must see with the lookup address if we have an existing
2431 * asoc. This will only happen if we were in the COOKIE-WAIT state
2432 * and a INIT collided with us and somewhere the peer sent the
2433 * cookie on another address besides the single address our assoc
2434 * had for him. In this case we will have one of the tie-tags set at
2435 * least AND the address field in the cookie can be used to look it
2439 switch (cookie->addr_type) {
2441 case SCTP_IPV6_ADDRESS:
2442 memset(&sin6, 0, sizeof(sin6));
2443 sin6.sin6_family = AF_INET6;
2444 sin6.sin6_len = sizeof(sin6);
2445 sin6.sin6_port = sh->src_port;
2446 sin6.sin6_scope_id = cookie->scope_id;
2447 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2448 sizeof(sin6.sin6_addr.s6_addr));
2449 to = (struct sockaddr *)&sin6;
2453 case SCTP_IPV4_ADDRESS:
2454 memset(&sin, 0, sizeof(sin));
2455 sin.sin_family = AF_INET;
2456 sin.sin_len = sizeof(sin);
2457 sin.sin_port = sh->src_port;
2458 sin.sin_addr.s_addr = cookie->address[0];
2459 to = (struct sockaddr *)&sin;
2463 /* This should not happen */
2466 if (*stcb == NULL) {
2467 /* Yep, lets check */
2468 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2469 if (*stcb == NULL) {
2471 * We should have only got back the same inp. If we
2472 * got back a different ep we have a problem. The
2473 * original findep got back l_inp and now
2475 if (l_inp != *inp_p) {
2476 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2479 if (*locked_tcb == NULL) {
2481 * In this case we found the assoc only
2482 * after we locked the create lock. This
2483 * means we are in a colliding case and we
2484 * must make sure that we unlock the tcb if
2485 * its one of the cases where we throw away
2486 * the incoming packets.
2488 *locked_tcb = *stcb;
2491 * We must also increment the inp ref count
2492 * since the ref_count flags was set when we
2493 * did not find the TCB, now we found it
2494 * which reduces the refcount.. we must
2495 * raise it back out to balance it all :-)
2497 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2498 if ((*stcb)->sctp_ep != l_inp) {
2499 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2500 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2506 cookie_len -= SCTP_SIGNATURE_SIZE;
2507 if (*stcb == NULL) {
2508 /* this is the "normal" case... get a new TCB */
2509 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2510 cookie, cookie_len, *inp_p,
2511 netp, to, ¬ification,
2512 auth_skipped, auth_offset, auth_len,
2516 /* this is abnormal... cookie-echo on existing TCB */
2517 had_a_existing_tcb = 1;
2518 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2520 cookie, cookie_len, *inp_p, *stcb, netp, to,
2521 ¬ification, auth_skipped, auth_offset, auth_len,
2526 if (*stcb == NULL) {
2527 /* still no TCB... must be bad cookie-echo */
2530 if (*netp != NULL) {
2531 (*netp)->flowtype = mflowtype;
2532 (*netp)->flowid = mflowid;
2535 * Ok, we built an association so confirm the address we sent the
2538 netl = sctp_findnet(*stcb, to);
2540 * This code should in theory NOT run but
2543 /* TSNH! Huh, why do I need to add this address here? */
2544 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2545 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2548 netl = sctp_findnet(*stcb, to);
2551 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2552 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2553 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2558 sctp_start_net_timers(*stcb);
2559 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2560 if (!had_a_existing_tcb ||
2561 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2563 * If we have a NEW cookie or the connect never
2564 * reached the connected state during collision we
2565 * must do the TCP accept thing.
2567 struct socket *so, *oso;
2568 struct sctp_inpcb *inp;
2570 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2572 * For a restart we will keep the same
2573 * socket, no need to do anything. I THINK!!
2575 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2576 if (send_int_conf) {
2577 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2578 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2582 oso = (*inp_p)->sctp_socket;
2583 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2584 SCTP_TCB_UNLOCK((*stcb));
2585 CURVNET_SET(oso->so_vnet);
2586 so = sonewconn(oso, 0
2589 SCTP_TCB_LOCK((*stcb));
2590 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2593 struct mbuf *op_err;
2595 /* Too many sockets */
2596 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2597 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2598 sctp_abort_association(*inp_p, NULL, m, iphlen,
2599 src, dst, sh, op_err,
2602 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2603 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2606 inp = (struct sctp_inpcb *)so->so_pcb;
2607 SCTP_INP_INCR_REF(inp);
2609 * We add the unbound flag here so that if we get an
2610 * soabort() before we get the move_pcb done, we
2611 * will properly cleanup.
2613 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2614 SCTP_PCB_FLAGS_CONNECTED |
2615 SCTP_PCB_FLAGS_IN_TCPPOOL |
2616 SCTP_PCB_FLAGS_UNBOUND |
2617 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2618 SCTP_PCB_FLAGS_DONT_WAKE);
2619 inp->sctp_features = (*inp_p)->sctp_features;
2620 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2621 inp->sctp_socket = so;
2622 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2623 inp->max_cwnd = (*inp_p)->max_cwnd;
2624 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2625 inp->ecn_supported = (*inp_p)->ecn_supported;
2626 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2627 inp->auth_supported = (*inp_p)->auth_supported;
2628 inp->asconf_supported = (*inp_p)->asconf_supported;
2629 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2630 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2631 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2632 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2633 inp->sctp_context = (*inp_p)->sctp_context;
2634 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2635 inp->fibnum = (*inp_p)->fibnum;
2636 inp->inp_starting_point_for_iterator = NULL;
2638 * copy in the authentication parameters from the
2641 if (inp->sctp_ep.local_hmacs)
2642 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2643 inp->sctp_ep.local_hmacs =
2644 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2645 if (inp->sctp_ep.local_auth_chunks)
2646 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2647 inp->sctp_ep.local_auth_chunks =
2648 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2651 * Now we must move it from one hash table to
2652 * another and get the tcb in the right place.
2656 * This is where the one-2-one socket is put into
2657 * the accept state waiting for the accept!
2660 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2662 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2664 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2665 SCTP_TCB_UNLOCK((*stcb));
2667 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2669 SCTP_TCB_LOCK((*stcb));
2670 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2673 * now we must check to see if we were aborted while
2674 * the move was going on and the lock/unlock
2677 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2679 * yep it was, we leave the assoc attached
2680 * to the socket since the sctp_inpcb_free()
2681 * call will send an abort for us.
2683 SCTP_INP_DECR_REF(inp);
2686 SCTP_INP_DECR_REF(inp);
2687 /* Switch over to the new guy */
2689 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2690 if (send_int_conf) {
2691 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2692 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2696 * Pull it from the incomplete queue and wake the
2704 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2706 if (send_int_conf) {
2707 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2708 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2714 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2715 struct sctp_tcb *stcb, struct sctp_nets *net)
2717 /* cp must not be used, others call this without a c-ack :-) */
2718 struct sctp_association *asoc;
2719 struct sctp_tmit_chunk *chk;
2721 SCTPDBG(SCTP_DEBUG_INPUT2,
2722 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2723 if ((stcb == NULL) || (net == NULL)) {
2728 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2729 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2730 asoc->overall_error_count,
2732 SCTP_FROM_SCTP_INPUT,
2735 asoc->overall_error_count = 0;
2736 sctp_stop_all_cookie_timers(stcb);
2737 /* process according to association state */
2738 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2739 /* state change only needed when I am in right state */
2740 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2741 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2742 sctp_start_net_timers(stcb);
2743 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2744 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2745 stcb->sctp_ep, stcb, NULL);
2748 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2749 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2750 if (asoc->overall_error_count == 0) {
2751 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2752 SCTP_RTT_FROM_NON_DATA);
2754 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2755 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2756 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2757 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2758 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2759 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2760 soisconnected(stcb->sctp_socket);
2764 * since we did not send a HB make sure we don't double
2767 net->hb_responded = 1;
2769 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2771 * We don't need to do the asconf thing, nor hb or
2772 * autoclose if the socket is closed.
2777 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2780 if (stcb->asoc.sctp_autoclose_ticks &&
2781 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2782 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2783 stcb->sctp_ep, stcb, NULL);
2786 * send ASCONF if parameters are pending and ASCONFs are
2787 * allowed (eg. addresses changed when init/cookie echo were
2790 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2791 (stcb->asoc.asconf_supported == 1) &&
2792 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2793 #ifdef SCTP_TIMER_BASED_ASCONF
2794 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2795 stcb->sctp_ep, stcb,
2796 stcb->asoc.primary_destination);
2798 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2799 SCTP_ADDR_NOT_LOCKED);
2804 /* Toss the cookie if I can */
2805 sctp_toss_old_cookies(stcb, asoc);
2806 /* Restart the timer if we have pending data */
2807 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2808 if (chk->whoTo != NULL) {
2813 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2818 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2819 struct sctp_tcb *stcb)
2821 struct sctp_nets *net;
2822 struct sctp_tmit_chunk *lchk;
2823 struct sctp_ecne_chunk bkup;
2824 uint8_t override_bit;
2825 uint32_t tsn, window_data_tsn;
2827 unsigned int pkt_cnt;
2829 len = ntohs(cp->ch.chunk_length);
2830 if ((len != sizeof(struct sctp_ecne_chunk)) &&
2831 (len != sizeof(struct old_sctp_ecne_chunk))) {
2834 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2835 /* Its the old format */
2836 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2837 bkup.num_pkts_since_cwr = htonl(1);
2840 SCTP_STAT_INCR(sctps_recvecne);
2841 tsn = ntohl(cp->tsn);
2842 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2843 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2845 window_data_tsn = stcb->asoc.sending_seq - 1;
2847 window_data_tsn = lchk->rec.data.tsn;
2850 /* Find where it was sent to if possible. */
2852 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2853 if (lchk->rec.data.tsn == tsn) {
2855 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2858 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2864 * What to do. A previous send of a CWR was possibly lost.
2865 * See how old it is, we may have it marked on the actual
2868 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2869 if (tsn == net->last_cwr_tsn) {
2870 /* Found him, send it off */
2876 * If we reach here, we need to send a special CWR
2877 * that says hey, we did this a long time ago and
2878 * you lost the response.
2880 net = TAILQ_FIRST(&stcb->asoc.nets);
2885 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2892 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2893 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2895 * JRS - Use the congestion control given in the pluggable
2898 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2900 * We reduce once every RTT. So we will only lower cwnd at
2901 * the next sending seq i.e. the window_data_tsn
2903 net->cwr_window_tsn = window_data_tsn;
2904 net->ecn_ce_pkt_cnt += pkt_cnt;
2905 net->lost_cnt = pkt_cnt;
2906 net->last_cwr_tsn = tsn;
2908 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2909 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2910 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2912 * Another loss in the same window update how many
2913 * marks/packets lost we have had.
2917 if (pkt_cnt > net->lost_cnt) {
2918 /* Should be the case */
2919 cnt = (pkt_cnt - net->lost_cnt);
2920 net->ecn_ce_pkt_cnt += cnt;
2922 net->lost_cnt = pkt_cnt;
2923 net->last_cwr_tsn = tsn;
2925 * Most CC functions will ignore this call, since we
2926 * are in-window yet of the initial CE the peer saw.
2928 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2932 * We always send a CWR this way if our previous one was lost our
2933 * peer will get an update, or if it is not time again to reduce we
2934 * still get the cwr to the peer. Note we set the override when we
2935 * could not find the TSN on the chunk or the destination network.
2937 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2941 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2944 * Here we get a CWR from the peer. We must look in the outqueue and
2945 * make sure that we have a covered ECNE in the control chunk part.
2948 struct sctp_tmit_chunk *chk, *nchk;
2949 struct sctp_ecne_chunk *ecne;
2953 cwr_tsn = ntohl(cp->tsn);
2954 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
2955 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
2956 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
2959 if ((override == 0) && (chk->whoTo != net)) {
2960 /* Must be from the right src unless override is set */
2963 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
2964 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
2965 /* this covers this ECNE, we can remove it */
2966 stcb->asoc.ecn_echo_cnt_onq--;
2967 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
2969 stcb->asoc.ctrl_queue_cnt--;
2970 sctp_m_freem(chk->data);
2972 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
2973 if (override == 0) {
2981 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
2982 struct sctp_tcb *stcb, struct sctp_nets *net)
2985 SCTPDBG(SCTP_DEBUG_INPUT2,
2986 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
2990 /* process according to association state */
2991 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
2992 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
2993 SCTPDBG(SCTP_DEBUG_INPUT2,
2994 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
2995 SCTP_TCB_UNLOCK(stcb);
2998 /* notify upper layer protocol */
2999 if (stcb->sctp_socket) {
3000 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3003 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3004 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3005 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3006 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3009 /* stop the timer */
3010 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3011 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3012 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3014 SCTPDBG(SCTP_DEBUG_INPUT2,
3015 "sctp_handle_shutdown_complete: calls free-asoc\n");
3016 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3017 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3022 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3023 struct sctp_nets *net, uint8_t flg)
3025 switch (desc->chunk_type) {
3028 /* find the tsn to resend (possibly) */
3031 struct sctp_tmit_chunk *tp1;
3033 tsn = ntohl(desc->tsn_ifany);
3034 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3035 if (tp1->rec.data.tsn == tsn) {
3039 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3047 * Do it the other way , aka without paying
3048 * attention to queue seq order.
3050 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3051 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3052 if (tp1->rec.data.tsn == tsn) {
3059 SCTP_STAT_INCR(sctps_pdrptsnnf);
3061 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3062 if (((flg & SCTP_BADCRC) == 0) &&
3063 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3066 if ((stcb->asoc.peers_rwnd == 0) &&
3067 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3068 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3071 if (stcb->asoc.peers_rwnd == 0 &&
3072 (flg & SCTP_FROM_MIDDLE_BOX)) {
3073 SCTP_STAT_INCR(sctps_pdrpdizrw);
3076 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3077 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3078 /* Payload not matching. */
3079 SCTP_STAT_INCR(sctps_pdrpbadd);
3082 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3083 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3084 /* Payload not matching. */
3085 SCTP_STAT_INCR(sctps_pdrpbadd);
3090 * this guy had a RTO calculation
3091 * pending on it, cancel it
3093 if (tp1->whoTo->rto_needed == 0) {
3094 tp1->whoTo->rto_needed = 1;
3098 SCTP_STAT_INCR(sctps_pdrpmark);
3099 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3100 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3102 * mark it as if we were doing a FR, since
3103 * we will be getting gap ack reports behind
3104 * the info from the router.
3106 tp1->rec.data.doing_fast_retransmit = 1;
3108 * mark the tsn with what sequences can
3111 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3112 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3114 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3117 /* restart the timer */
3118 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3120 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3121 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3124 /* fix counts and things */
3125 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3126 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3127 tp1->whoTo->flight_size,
3129 (uint32_t)(uintptr_t)stcb,
3132 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3133 sctp_flight_size_decrease(tp1);
3134 sctp_total_flight_decrease(stcb, tp1);
3136 tp1->sent = SCTP_DATAGRAM_RESEND;
3142 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3143 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3146 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3148 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3151 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3152 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3153 audit, stcb->asoc.sent_queue_retran_cnt);
3154 #ifndef SCTP_AUDITING_ENABLED
3155 stcb->asoc.sent_queue_retran_cnt = audit;
3163 struct sctp_tmit_chunk *asconf;
3165 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3167 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3172 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3173 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3174 asconf->sent = SCTP_DATAGRAM_RESEND;
3175 asconf->snd_count--;
3179 case SCTP_INITIATION:
3180 /* resend the INIT */
3181 stcb->asoc.dropped_special_cnt++;
3182 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3184 * If we can get it in, in a few attempts we do
3185 * this, otherwise we let the timer fire.
3187 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3189 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3190 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3193 case SCTP_SELECTIVE_ACK:
3194 case SCTP_NR_SELECTIVE_ACK:
3195 /* resend the sack */
3196 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3198 case SCTP_HEARTBEAT_REQUEST:
3199 /* resend a demand HB */
3200 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3202 * Only retransmit if we KNOW we wont destroy the
3205 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3209 sctp_send_shutdown(stcb, net);
3211 case SCTP_SHUTDOWN_ACK:
3212 sctp_send_shutdown_ack(stcb, net);
3214 case SCTP_COOKIE_ECHO:
3216 struct sctp_tmit_chunk *cookie;
3219 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3221 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3226 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3227 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3228 cookie->sent = SCTP_DATAGRAM_RESEND;
3229 sctp_stop_all_cookie_timers(stcb);
3233 case SCTP_COOKIE_ACK:
3234 sctp_send_cookie_ack(stcb);
3236 case SCTP_ASCONF_ACK:
3237 /* resend last asconf ack */
3238 sctp_send_asconf_ack(stcb);
3240 case SCTP_IFORWARD_CUM_TSN:
3241 case SCTP_FORWARD_CUM_TSN:
3242 send_forward_tsn(stcb, &stcb->asoc);
3244 /* can't do anything with these */
3245 case SCTP_PACKET_DROPPED:
3246 case SCTP_INITIATION_ACK: /* this should not happen */
3247 case SCTP_HEARTBEAT_ACK:
3248 case SCTP_ABORT_ASSOCIATION:
3249 case SCTP_OPERATION_ERROR:
3250 case SCTP_SHUTDOWN_COMPLETE:
3260 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3266 * We set things to 0xffffffff since this is the last delivered
3267 * sequence and we will be sending in 0 after the reset.
3270 if (number_entries) {
3271 for (i = 0; i < number_entries; i++) {
3272 temp = ntohs(list[i]);
3273 if (temp >= stcb->asoc.streamincnt) {
3276 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3280 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3281 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3284 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3288 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3293 if (number_entries > 0) {
3294 for (i = 0; i < number_entries; i++) {
3295 temp = ntohs(list[i]);
3296 if (temp >= stcb->asoc.streamoutcnt) {
3297 /* no such stream */
3300 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3301 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3304 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3305 stcb->asoc.strmout[i].next_mid_ordered = 0;
3306 stcb->asoc.strmout[i].next_mid_unordered = 0;
3309 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3313 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3318 if (number_entries > 0) {
3319 for (i = 0; i < number_entries; i++) {
3320 temp = ntohs(list[i]);
3321 if (temp >= stcb->asoc.streamoutcnt) {
3322 /* no such stream */
3325 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3328 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3329 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3334 struct sctp_stream_reset_request *
3335 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3337 struct sctp_association *asoc;
3338 struct sctp_chunkhdr *ch;
3339 struct sctp_stream_reset_request *r;
3340 struct sctp_tmit_chunk *chk;
3344 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3345 asoc->stream_reset_outstanding = 0;
3348 if (stcb->asoc.str_reset == NULL) {
3349 asoc->stream_reset_outstanding = 0;
3352 chk = stcb->asoc.str_reset;
3353 if (chk->data == NULL) {
3357 /* he wants a copy of the chk pointer */
3360 clen = chk->send_size;
3361 ch = mtod(chk->data, struct sctp_chunkhdr *);
3362 r = (struct sctp_stream_reset_request *)(ch + 1);
3363 if (ntohl(r->request_seq) == seq) {
3367 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3368 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3369 /* move to the next one, there can only be a max of two */
3370 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3371 if (ntohl(r->request_seq) == seq) {
3375 /* that seq is not here */
3380 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3382 struct sctp_association *asoc;
3383 struct sctp_tmit_chunk *chk;
3386 chk = asoc->str_reset;
3390 asoc->str_reset = NULL;
3391 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3392 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3393 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3394 asoc->ctrl_queue_cnt--;
3396 sctp_m_freem(chk->data);
3399 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3403 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3404 uint32_t seq, uint32_t action,
3405 struct sctp_stream_reset_response *respin)
3409 struct sctp_association *asoc = &stcb->asoc;
3410 struct sctp_tmit_chunk *chk;
3411 struct sctp_stream_reset_request *req_param;
3412 struct sctp_stream_reset_out_request *req_out_param;
3413 struct sctp_stream_reset_in_request *req_in_param;
3414 uint32_t number_entries;
3416 if (asoc->stream_reset_outstanding == 0) {
3420 if (seq == stcb->asoc.str_reset_seq_out) {
3421 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3422 if (req_param != NULL) {
3423 stcb->asoc.str_reset_seq_out++;
3424 type = ntohs(req_param->ph.param_type);
3425 lparam_len = ntohs(req_param->ph.param_length);
3426 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3429 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3430 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3431 asoc->stream_reset_out_is_outstanding = 0;
3432 if (asoc->stream_reset_outstanding)
3433 asoc->stream_reset_outstanding--;
3434 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3436 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3437 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3438 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3439 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3441 * Set it up so we don't stop
3444 asoc->stream_reset_outstanding++;
3445 stcb->asoc.str_reset_seq_out--;
3446 asoc->stream_reset_out_is_outstanding = 1;
3449 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3451 if (no_clear == 0) {
3452 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3454 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3455 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3456 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3457 if (asoc->stream_reset_outstanding)
3458 asoc->stream_reset_outstanding--;
3459 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3460 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3461 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3462 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3463 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3464 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3466 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3467 /* Ok we now may have more streams */
3470 num_stream = stcb->asoc.strm_pending_add_size;
3471 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3473 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3475 stcb->asoc.strm_pending_add_size = 0;
3476 if (asoc->stream_reset_outstanding)
3477 asoc->stream_reset_outstanding--;
3478 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3479 /* Put the new streams into effect */
3482 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3483 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3485 asoc->streamoutcnt += num_stream;
3486 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3487 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3488 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3489 SCTP_STREAM_CHANGE_DENIED);
3491 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3492 SCTP_STREAM_CHANGE_FAILED);
3494 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3495 if (asoc->stream_reset_outstanding)
3496 asoc->stream_reset_outstanding--;
3497 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3498 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3499 SCTP_STREAM_CHANGE_DENIED);
3500 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3501 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3502 SCTP_STREAM_CHANGE_FAILED);
3504 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3506 * a) Adopt the new in tsn.
3508 * c) Adopt the new out-tsn
3510 struct sctp_stream_reset_response_tsn *resp;
3511 struct sctp_forward_tsn_chunk fwdtsn;
3514 if (respin == NULL) {
3518 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3521 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3522 resp = (struct sctp_stream_reset_response_tsn *)respin;
3523 asoc->stream_reset_outstanding--;
3524 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3525 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3526 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3527 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3531 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3532 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3533 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3536 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3537 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3538 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3540 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3541 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3543 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3544 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3546 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3547 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3548 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3549 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3550 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3551 SCTP_ASSOC_RESET_DENIED);
3553 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3554 SCTP_ASSOC_RESET_FAILED);
3557 /* get rid of the request and get the request flags */
3558 if (asoc->stream_reset_outstanding == 0) {
3559 sctp_clean_up_stream_reset(stcb);
3563 if (asoc->stream_reset_outstanding == 0) {
3564 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3570 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3571 struct sctp_tmit_chunk *chk,
3572 struct sctp_stream_reset_in_request *req, int trunc)
3580 * peer wants me to send a str-reset to him for my outgoing seq's if
3583 struct sctp_association *asoc = &stcb->asoc;
3585 seq = ntohl(req->request_seq);
3586 if (asoc->str_reset_seq_in == seq) {
3587 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3588 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3589 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3591 /* Can't do it, since they exceeded our buffer size */
3592 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3593 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3594 len = ntohs(req->ph.param_length);
3595 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3596 if (number_entries) {
3597 for (i = 0; i < number_entries; i++) {
3598 temp = ntohs(req->list_of_streams[i]);
3599 if (temp >= stcb->asoc.streamoutcnt) {
3600 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3603 req->list_of_streams[i] = temp;
3605 for (i = 0; i < number_entries; i++) {
3606 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3607 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3612 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3613 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3614 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3617 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3619 /* Can't do it, since we have sent one out */
3620 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3623 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3624 asoc->str_reset_seq_in++;
3625 } else if (asoc->str_reset_seq_in - 1 == seq) {
3626 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3627 } else if (asoc->str_reset_seq_in - 2 == seq) {
3628 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3630 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3632 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3636 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3637 struct sctp_tmit_chunk *chk,
3638 struct sctp_stream_reset_tsn_request *req)
3640 /* reset all in and out and update the tsn */
3642 * A) reset my str-seq's on in and out. B) Select a receive next,
3643 * and set cum-ack to it. Also process this selected number as a
3644 * fwd-tsn as well. C) set in the response my next sending seq.
3646 struct sctp_forward_tsn_chunk fwdtsn;
3647 struct sctp_association *asoc = &stcb->asoc;
3651 seq = ntohl(req->request_seq);
3652 if (asoc->str_reset_seq_in == seq) {
3653 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3654 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3655 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3657 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3658 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3659 fwdtsn.ch.chunk_flags = 0;
3660 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3661 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3665 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3666 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3667 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3669 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3670 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3671 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3672 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3673 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3674 atomic_add_int(&asoc->sending_seq, 1);
3675 /* save off historical data for retrans */
3676 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3677 asoc->last_sending_seq[0] = asoc->sending_seq;
3678 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3679 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3680 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3681 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3682 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3683 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3685 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3686 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3687 asoc->str_reset_seq_in++;
3688 } else if (asoc->str_reset_seq_in - 1 == seq) {
3689 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3690 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3691 } else if (asoc->str_reset_seq_in - 2 == seq) {
3692 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3693 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3695 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3701 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3702 struct sctp_tmit_chunk *chk,
3703 struct sctp_stream_reset_out_request *req, int trunc)
3706 int number_entries, len;
3707 struct sctp_association *asoc = &stcb->asoc;
3709 seq = ntohl(req->request_seq);
3711 /* now if its not a duplicate we process it */
3712 if (asoc->str_reset_seq_in == seq) {
3713 len = ntohs(req->ph.param_length);
3714 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3716 * the sender is resetting, handle the list issue.. we must
3717 * a) verify if we can do the reset, if so no problem b) If
3718 * we can't do the reset we must copy the request. c) queue
3719 * it, and setup the data in processor to trigger it off
3720 * when needed and dequeue all the queued data.
3722 tsn = ntohl(req->send_reset_at_tsn);
3724 /* move the reset action back one */
3725 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3726 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3727 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3729 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3730 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3731 /* we can do it now */
3732 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3733 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3736 * we must queue it up and thus wait for the TSN's
3737 * to arrive that are at or before tsn
3739 struct sctp_stream_reset_list *liste;
3742 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3743 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3744 siz, SCTP_M_STRESET);
3745 if (liste == NULL) {
3746 /* gak out of memory */
3747 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3748 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3753 liste->number_entries = number_entries;
3754 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3755 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3756 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3758 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3759 asoc->str_reset_seq_in++;
3760 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3762 * one seq back, just echo back last action since my
3763 * response was lost.
3765 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3766 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3768 * two seq back, just echo back last action since my
3769 * response was lost.
3771 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3773 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3778 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3779 struct sctp_stream_reset_add_strm *str_add)
3782 * Peer is requesting to add more streams. If its within our
3783 * max-streams we will allow it.
3785 uint32_t num_stream, i;
3787 struct sctp_association *asoc = &stcb->asoc;
3788 struct sctp_queued_to_read *ctl, *nctl;
3790 /* Get the number. */
3791 seq = ntohl(str_add->request_seq);
3792 num_stream = ntohs(str_add->number_of_streams);
3793 /* Now what would be the new total? */
3794 if (asoc->str_reset_seq_in == seq) {
3795 num_stream += stcb->asoc.streamincnt;
3796 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3797 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3798 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3799 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3800 (num_stream > 0xffff)) {
3801 /* We must reject it they ask for to many */
3803 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3805 /* Ok, we can do that :-) */
3806 struct sctp_stream_in *oldstrm;
3808 /* save off the old */
3809 oldstrm = stcb->asoc.strmin;
3810 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3811 (num_stream * sizeof(struct sctp_stream_in)),
3813 if (stcb->asoc.strmin == NULL) {
3814 stcb->asoc.strmin = oldstrm;
3817 /* copy off the old data */
3818 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3819 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3820 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3821 stcb->asoc.strmin[i].sid = i;
3822 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3823 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3824 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3825 /* now anything on those queues? */
3826 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3827 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3828 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3830 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3831 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3832 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3835 /* Init the new streams */
3836 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3837 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3838 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3839 stcb->asoc.strmin[i].sid = i;
3840 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3841 stcb->asoc.strmin[i].pd_api_started = 0;
3842 stcb->asoc.strmin[i].delivery_started = 0;
3844 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3845 /* update the size */
3846 stcb->asoc.streamincnt = num_stream;
3847 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3848 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3850 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3851 asoc->str_reset_seq_in++;
3852 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3854 * one seq back, just echo back last action since my
3855 * response was lost.
3857 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3858 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3860 * two seq back, just echo back last action since my
3861 * response was lost.
3863 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3865 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3870 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3871 struct sctp_stream_reset_add_strm *str_add)
3874 * Peer is requesting to add more streams. If its within our
3875 * max-streams we will allow it.
3877 uint16_t num_stream;
3879 struct sctp_association *asoc = &stcb->asoc;
3881 /* Get the number. */
3882 seq = ntohl(str_add->request_seq);
3883 num_stream = ntohs(str_add->number_of_streams);
3884 /* Now what would be the new total? */
3885 if (asoc->str_reset_seq_in == seq) {
3886 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3887 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3888 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3889 } else if (stcb->asoc.stream_reset_outstanding) {
3890 /* We must reject it we have something pending */
3891 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3893 /* Ok, we can do that :-) */
3896 mychk = stcb->asoc.streamoutcnt;
3897 mychk += num_stream;
3898 if (mychk < 0x10000) {
3899 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3900 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3901 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3904 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3907 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3908 asoc->str_reset_seq_in++;
3909 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3911 * one seq back, just echo back last action since my
3912 * response was lost.
3914 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3915 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3917 * two seq back, just echo back last action since my
3918 * response was lost.
3920 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3922 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3927 __attribute__((noinline))
3930 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3931 struct sctp_chunkhdr *ch_req)
3933 uint16_t remaining_length, param_len, ptype;
3934 struct sctp_paramhdr pstore;
3935 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3939 struct sctp_tmit_chunk *chk;
3940 struct sctp_chunkhdr *ch;
3941 struct sctp_paramhdr *ph;
3945 /* now it may be a reset or a reset-response */
3946 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3948 /* setup for adding the response */
3949 sctp_alloc_a_chunk(stcb, chk);
3953 chk->copy_by_ref = 0;
3954 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
3955 chk->rec.chunk_id.can_take_data = 0;
3957 chk->asoc = &stcb->asoc;
3958 chk->no_fr_allowed = 0;
3959 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
3960 chk->book_size_scale = 0;
3961 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
3962 if (chk->data == NULL) {
3965 sctp_m_freem(chk->data);
3968 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3971 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
3973 /* setup chunk parameters */
3974 chk->sent = SCTP_DATAGRAM_UNSENT;
3978 ch = mtod(chk->data, struct sctp_chunkhdr *);
3979 ch->chunk_type = SCTP_STREAM_RESET;
3980 ch->chunk_flags = 0;
3981 ch->chunk_length = htons(chk->send_size);
3982 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
3983 offset += sizeof(struct sctp_chunkhdr);
3984 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
3985 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
3990 param_len = ntohs(ph->param_length);
3991 if ((param_len > remaining_length) ||
3992 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
3993 /* bad parameter length */
3996 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
3997 (uint8_t *)&cstore);
4002 ptype = ntohs(ph->param_type);
4004 if (param_len > sizeof(cstore)) {
4009 if (num_param > SCTP_MAX_RESET_PARAMS) {
4010 /* hit the max of parameters already sorry.. */
4013 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4014 struct sctp_stream_reset_out_request *req_out;
4016 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4019 req_out = (struct sctp_stream_reset_out_request *)ph;
4021 if (stcb->asoc.stream_reset_outstanding) {
4022 seq = ntohl(req_out->response_seq);
4023 if (seq == stcb->asoc.str_reset_seq_out) {
4025 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4028 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4029 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4030 struct sctp_stream_reset_add_strm *str_add;
4032 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4035 str_add = (struct sctp_stream_reset_add_strm *)ph;
4037 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4038 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4039 struct sctp_stream_reset_add_strm *str_add;
4041 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4044 str_add = (struct sctp_stream_reset_add_strm *)ph;
4046 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4047 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4048 struct sctp_stream_reset_in_request *req_in;
4051 req_in = (struct sctp_stream_reset_in_request *)ph;
4052 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4053 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4054 struct sctp_stream_reset_tsn_request *req_tsn;
4057 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4058 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4060 goto strres_nochunk;
4064 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4065 struct sctp_stream_reset_response *resp;
4068 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4071 resp = (struct sctp_stream_reset_response *)ph;
4072 seq = ntohl(resp->response_seq);
4073 result = ntohl(resp->result);
4074 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4076 goto strres_nochunk;
4081 offset += SCTP_SIZE32(param_len);
4082 if (remaining_length >= SCTP_SIZE32(param_len)) {
4083 remaining_length -= SCTP_SIZE32(param_len);
4085 remaining_length = 0;
4089 /* we have no response free the stuff */
4090 goto strres_nochunk;
4092 /* ok we have a chunk to link in */
4093 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4096 stcb->asoc.ctrl_queue_cnt++;
4101 * Handle a router or endpoints report of a packet loss, there are two ways
4102 * to handle this, either we get the whole packet and must disect it
4103 * ourselves (possibly with truncation and or corruption) or it is a summary
4104 * from a middle box that did the disectting for us.
4107 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4108 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4110 struct sctp_chunk_desc desc;
4111 struct sctp_chunkhdr *chk_hdr;
4112 struct sctp_data_chunk *data_chunk;
4113 struct sctp_idata_chunk *idata_chunk;
4114 uint32_t bottle_bw, on_queue;
4115 uint32_t offset, chk_len;
4116 uint16_t pktdrp_len;
4117 uint8_t pktdrp_flags;
4119 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4120 ("PKTDROP chunk too small"));
4121 pktdrp_flags = cp->ch.chunk_flags;
4122 pktdrp_len = ntohs(cp->ch.chunk_length);
4123 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4124 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4125 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4126 /* The peer plays games with us. */
4130 limit -= sizeof(struct sctp_pktdrop_chunk);
4132 if (offset == limit) {
4133 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4134 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4136 } else if (offset + sizeof(struct sctphdr) > limit) {
4137 /* Only a partial SCTP common header. */
4138 SCTP_STAT_INCR(sctps_pdrpcrupt);
4141 /* XXX: Check embedded SCTP common header. */
4142 offset += sizeof(struct sctphdr);
4144 /* Now parse through the chunks themselves. */
4145 while (offset < limit) {
4146 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4147 SCTP_STAT_INCR(sctps_pdrpcrupt);
4150 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4151 desc.chunk_type = chk_hdr->chunk_type;
4152 /* get amount we need to move */
4153 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4154 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4155 /* Someone is lying... */
4158 if (desc.chunk_type == SCTP_DATA) {
4159 if (stcb->asoc.idata_supported) {
4160 /* Some is playing games with us. */
4163 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4164 /* Some is playing games with us. */
4167 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4169 * Not enough data bytes available in the
4172 SCTP_STAT_INCR(sctps_pdrpnedat);
4175 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4176 /* Not enough data in buffer. */
4179 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4180 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4181 desc.tsn_ifany = data_chunk->dp.tsn;
4182 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4183 SCTP_STAT_INCR(sctps_pdrpmbda);
4185 } else if (desc.chunk_type == SCTP_IDATA) {
4186 if (!stcb->asoc.idata_supported) {
4187 /* Some is playing games with us. */
4190 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4191 /* Some is playing games with us. */
4194 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4196 * Not enough data bytes available in the
4199 SCTP_STAT_INCR(sctps_pdrpnedat);
4202 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4203 /* Not enough data in buffer. */
4206 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4207 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4208 desc.tsn_ifany = idata_chunk->dp.tsn;
4209 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4210 SCTP_STAT_INCR(sctps_pdrpmbda);
4213 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4214 SCTP_STAT_INCR(sctps_pdrpmbct);
4217 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4218 SCTP_STAT_INCR(sctps_pdrppdbrk);
4222 offset += SCTP_SIZE32(chk_len);
4224 /* Now update any rwnd --- possibly */
4225 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4226 /* From a peer, we get a rwnd report */
4229 SCTP_STAT_INCR(sctps_pdrpfehos);
4231 bottle_bw = ntohl(cp->bottle_bw);
4232 on_queue = ntohl(cp->current_onq);
4233 if (bottle_bw && on_queue) {
4234 /* a rwnd report is in here */
4235 if (bottle_bw > on_queue)
4236 a_rwnd = bottle_bw - on_queue;
4241 stcb->asoc.peers_rwnd = 0;
4243 if (a_rwnd > stcb->asoc.total_flight) {
4244 stcb->asoc.peers_rwnd =
4245 a_rwnd - stcb->asoc.total_flight;
4247 stcb->asoc.peers_rwnd = 0;
4249 if (stcb->asoc.peers_rwnd <
4250 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4251 /* SWS sender side engages */
4252 stcb->asoc.peers_rwnd = 0;
4257 SCTP_STAT_INCR(sctps_pdrpfmbox);
4260 /* now middle boxes in sat networks get a cwnd bump */
4261 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4262 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4263 (stcb->asoc.sat_network)) {
4265 * This is debatable but for sat networks it makes sense
4266 * Note if a T3 timer has went off, we will prohibit any
4267 * changes to cwnd until we exit the t3 loss recovery.
4269 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4270 net, cp, &bottle_bw, &on_queue);
4275 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4276 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4277 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4278 * length of the complete packet outputs: - length: modified to remaining
4279 * length after control processing - netp: modified to new sctp_nets after
4280 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4281 * bad packet,...) otherwise return the tcb for this packet
4284 __attribute__((noinline))
4286 static struct sctp_tcb *
4287 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4288 struct sockaddr *src, struct sockaddr *dst,
4289 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4290 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4291 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4292 uint32_t vrf_id, uint16_t port)
4294 struct sctp_association *asoc;
4295 struct mbuf *op_err;
4296 char msg[SCTP_DIAG_INFO_LEN];
4298 int num_chunks = 0; /* number of control chunks processed */
4299 uint32_t chk_length, contiguous;
4301 int abort_no_unlock = 0;
4305 * How big should this be, and should it be alloc'd? Lets try the
4306 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4307 * until we get into jumbo grams and such..
4309 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4311 uint32_t auth_offset = 0, auth_len = 0;
4312 int auth_skipped = 0;
4315 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4316 iphlen, *offset, length, (void *)stcb);
4319 SCTP_TCB_LOCK_ASSERT(stcb);
4321 /* validate chunk header length... */
4322 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4323 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4324 ntohs(ch->chunk_length));
4329 * validate the verification tag
4331 vtag_in = ntohl(sh->v_tag);
4333 if (ch->chunk_type == SCTP_INITIATION) {
4334 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4335 ntohs(ch->chunk_length), vtag_in);
4337 /* protocol error- silently discard... */
4338 SCTP_STAT_INCR(sctps_badvtag);
4340 SCTP_TCB_UNLOCK(stcb);
4344 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4346 * If there is no stcb, skip the AUTH chunk and process
4347 * later after a stcb is found (to validate the lookup was
4350 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4352 (inp->auth_supported == 1)) {
4353 /* save this chunk for later processing */
4355 auth_offset = *offset;
4356 auth_len = ntohs(ch->chunk_length);
4358 /* (temporarily) move past this chunk */
4359 *offset += SCTP_SIZE32(auth_len);
4360 if (*offset >= length) {
4361 /* no more data left in the mbuf chain */
4365 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4366 sizeof(struct sctp_chunkhdr), chunk_buf);
4373 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4374 goto process_control_chunks;
4377 * first check if it's an ASCONF with an unknown src addr we
4378 * need to look inside to find the association
4380 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4381 struct sctp_chunkhdr *asconf_ch = ch;
4382 uint32_t asconf_offset = 0, asconf_len = 0;
4384 /* inp's refcount may be reduced */
4385 SCTP_INP_INCR_REF(inp);
4387 asconf_offset = *offset;
4389 asconf_len = ntohs(asconf_ch->chunk_length);
4390 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4392 stcb = sctp_findassociation_ep_asconf(m,
4395 sh, &inp, netp, vrf_id);
4398 asconf_offset += SCTP_SIZE32(asconf_len);
4399 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4400 sizeof(struct sctp_chunkhdr), chunk_buf);
4401 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4404 * reduce inp's refcount if not reduced in
4405 * sctp_findassociation_ep_asconf().
4407 SCTP_INP_DECR_REF(inp);
4410 /* now go back and verify any auth chunk to be sure */
4411 if (auth_skipped && (stcb != NULL)) {
4412 struct sctp_auth_chunk *auth;
4414 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4415 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4421 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4423 /* auth HMAC failed so dump it */
4427 /* remaining chunks are HMAC checked */
4428 stcb->asoc.authenticated = 1;
4433 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4434 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4436 /* no association, so it's out of the blue... */
4437 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4438 mflowtype, mflowid, inp->fibnum,
4444 /* ABORT and SHUTDOWN can use either v_tag... */
4445 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4446 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4447 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4448 /* Take the T-bit always into account. */
4449 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4450 (vtag_in == asoc->my_vtag)) ||
4451 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4452 (asoc->peer_vtag != htonl(0)) &&
4453 (vtag_in == asoc->peer_vtag))) {
4456 /* drop this packet... */
4457 SCTP_STAT_INCR(sctps_badvtag);
4459 SCTP_TCB_UNLOCK(stcb);
4463 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4464 if (vtag_in != asoc->my_vtag) {
4466 * this could be a stale SHUTDOWN-ACK or the
4467 * peer never got the SHUTDOWN-COMPLETE and
4468 * is still hung; we have started a new asoc
4469 * but it won't complete until the shutdown
4473 SCTP_TCB_UNLOCK(stcb);
4475 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4476 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4478 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4480 mflowtype, mflowid, fibnum,
4485 /* for all other chunks, vtag must match */
4486 if (vtag_in != asoc->my_vtag) {
4487 /* invalid vtag... */
4488 SCTPDBG(SCTP_DEBUG_INPUT3,
4489 "invalid vtag: %xh, expect %xh\n",
4490 vtag_in, asoc->my_vtag);
4491 SCTP_STAT_INCR(sctps_badvtag);
4493 SCTP_TCB_UNLOCK(stcb);
4499 } /* end if !SCTP_COOKIE_ECHO */
4501 * process all control chunks...
4503 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4504 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4505 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4506 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4507 /* implied cookie-ack.. we must have lost the ack */
4508 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4512 process_control_chunks:
4513 while (IS_SCTP_CONTROL(ch)) {
4514 /* validate chunk length */
4515 chk_length = ntohs(ch->chunk_length);
4516 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4517 ch->chunk_type, chk_length);
4518 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4519 if (chk_length < sizeof(*ch) ||
4520 (*offset + (int)chk_length) > length) {
4524 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4526 * INIT and INIT-ACK only gets the init ack "header" portion
4527 * only because we don't have to process the peer's COOKIE.
4528 * All others get a complete chunk.
4530 switch (ch->chunk_type) {
4531 case SCTP_INITIATION:
4532 contiguous = sizeof(struct sctp_init_chunk);
4534 case SCTP_INITIATION_ACK:
4535 contiguous = sizeof(struct sctp_init_ack_chunk);
4538 contiguous = min(chk_length, sizeof(chunk_buf));
4541 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4547 SCTP_TCB_UNLOCK(stcb);
4553 /* Save off the last place we got a control from */
4555 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4557 * allow last_control to be NULL if
4558 * ASCONF... ASCONF processing will find the
4561 if ((netp != NULL) && (*netp != NULL))
4562 stcb->asoc.last_control_chunk_from = *netp;
4565 #ifdef SCTP_AUDITING_ENABLED
4566 sctp_audit_log(0xB0, ch->chunk_type);
4569 /* check to see if this chunk required auth, but isn't */
4570 if ((stcb != NULL) &&
4571 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4572 !stcb->asoc.authenticated) {
4573 /* "silently" ignore */
4574 SCTP_STAT_INCR(sctps_recvauthmissing);
4577 switch (ch->chunk_type) {
4578 case SCTP_INITIATION:
4579 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4580 /* The INIT chunk must be the only chunk. */
4581 if ((num_chunks > 1) ||
4582 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4583 /* RFC 4960 requires that no ABORT is sent */
4586 SCTP_TCB_UNLOCK(stcb);
4590 /* Honor our resource limit. */
4591 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4592 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4593 sctp_abort_association(inp, stcb, m, iphlen,
4594 src, dst, sh, op_err,
4600 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4601 (struct sctp_init_chunk *)ch, inp,
4602 stcb, *netp, &abort_no_unlock,
4606 if ((!abort_no_unlock) && (stcb != NULL)) {
4607 SCTP_TCB_UNLOCK(stcb);
4611 case SCTP_PAD_CHUNK:
4613 case SCTP_INITIATION_ACK:
4614 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4615 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4616 /* We are not interested anymore */
4617 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4622 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4623 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4628 /* The INIT-ACK chunk must be the only chunk. */
4629 if ((num_chunks > 1) ||
4630 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4634 if ((netp != NULL) && (*netp != NULL)) {
4635 ret = sctp_handle_init_ack(m, iphlen, *offset,
4637 (struct sctp_init_ack_chunk *)ch,
4646 if (abort_no_unlock) {
4650 * Special case, I must call the output routine to
4651 * get the cookie echoed
4653 if ((stcb != NULL) && (ret == 0)) {
4654 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4658 case SCTP_SELECTIVE_ACK:
4659 case SCTP_NR_SELECTIVE_ACK:
4662 uint32_t a_rwnd, cum_ack;
4663 uint16_t num_seg, num_nr_seg, num_dup;
4665 int offset_seg, offset_dup;
4667 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4668 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4669 SCTP_STAT_INCR(sctps_recvsacks);
4671 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4672 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4675 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4676 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4677 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4681 if (stcb->asoc.nrsack_supported == 0) {
4684 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4685 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4689 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4691 * If we have sent a shutdown-ack, we will pay no
4692 * attention to a sack sent in to us since
4693 * we don't care anymore.
4697 flags = ch->chunk_flags;
4698 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4699 struct sctp_sack_chunk *sack;
4701 sack = (struct sctp_sack_chunk *)ch;
4702 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4703 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4705 num_dup = ntohs(sack->sack.num_dup_tsns);
4706 a_rwnd = ntohl(sack->sack.a_rwnd);
4707 if (sizeof(struct sctp_sack_chunk) +
4708 num_seg * sizeof(struct sctp_gap_ack_block) +
4709 num_dup * sizeof(uint32_t) != chk_length) {
4710 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4713 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4714 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4716 struct sctp_nr_sack_chunk *nr_sack;
4718 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4719 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4720 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4721 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4722 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4723 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4724 if (sizeof(struct sctp_nr_sack_chunk) +
4725 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4726 num_dup * sizeof(uint32_t) != chk_length) {
4727 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4730 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4731 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4733 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4734 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4735 cum_ack, num_seg, a_rwnd);
4736 stcb->asoc.seen_a_sack_this_pkt = 1;
4737 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4738 (num_seg == 0) && (num_nr_seg == 0) &&
4739 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4740 (stcb->asoc.saw_sack_with_frags == 0) &&
4741 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4742 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4744 * We have a SIMPLE sack having no
4745 * prior segments and data on sent
4746 * queue to be acked. Use the faster
4747 * path sack processing. We also
4748 * allow window update sacks with no
4749 * missing segments to go this way
4752 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4753 &abort_now, ecne_seen);
4755 if ((netp != NULL) && (*netp != NULL)) {
4756 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4757 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4758 cum_ack, a_rwnd, ecne_seen);
4762 /* ABORT signal from sack processing */
4766 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4767 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4768 (stcb->asoc.stream_queue_cnt == 0)) {
4769 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4773 case SCTP_HEARTBEAT_REQUEST:
4774 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4775 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4776 SCTP_STAT_INCR(sctps_recvheartbeat);
4777 sctp_send_heartbeat_ack(stcb, m, *offset,
4781 case SCTP_HEARTBEAT_ACK:
4782 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4783 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4788 SCTP_STAT_INCR(sctps_recvheartbeatack);
4789 if ((netp != NULL) && (*netp != NULL)) {
4790 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4794 case SCTP_ABORT_ASSOCIATION:
4795 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4798 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4799 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4809 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4811 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4815 if ((netp != NULL) && (*netp != NULL)) {
4818 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4819 stcb, *netp, &abort_flag);
4826 case SCTP_SHUTDOWN_ACK:
4827 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4828 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4829 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4834 case SCTP_OPERATION_ERROR:
4835 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4836 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4837 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4842 case SCTP_COOKIE_ECHO:
4843 SCTPDBG(SCTP_DEBUG_INPUT3,
4844 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4845 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4848 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4849 /* We are not interested anymore */
4852 SCTP_TCB_UNLOCK(stcb);
4859 * First are we accepting? We do this again here
4860 * since it is possible that a previous endpoint WAS
4861 * listening responded to a INIT-ACK and then
4862 * closed. We opened and bound.. and are now no
4865 * XXXGL: notes on checking listen queue length.
4866 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4867 * SOLISTENING(), because a listening "UDP type"
4868 * socket isn't listening in terms of the socket
4869 * layer. It is a normal data flow socket, that
4870 * can fork off new connections. Thus, we should
4871 * look into sol_qlen only in case we are !UDP.
4872 * 2) Checking sol_qlen in general requires locking
4873 * the socket, and this code lacks that.
4875 if ((stcb == NULL) &&
4876 (!SCTP_IS_LISTENING(inp) ||
4877 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
4878 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4880 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4881 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4882 sctp_abort_association(inp, stcb, m, iphlen,
4883 src, dst, sh, op_err,
4890 struct mbuf *ret_buf;
4891 struct sctp_inpcb *linp;
4892 struct sctp_tmit_chunk *chk;
4901 SCTP_ASOC_CREATE_LOCK(linp);
4902 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
4903 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4904 SCTP_ASOC_CREATE_UNLOCK(linp);
4910 struct sctp_tcb *locked_stcb;
4914 sctp_handle_cookie_echo(m, iphlen,
4918 (struct sctp_cookie_echo_chunk *)ch,
4928 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4929 SCTP_TCB_UNLOCK(locked_stcb);
4932 SCTP_TCB_LOCK_ASSERT(stcb);
4938 SCTP_ASOC_CREATE_UNLOCK(linp);
4940 if (ret_buf == NULL) {
4942 SCTP_TCB_UNLOCK(stcb);
4944 SCTPDBG(SCTP_DEBUG_INPUT3,
4945 "GAK, null buffer\n");
4949 /* if AUTH skipped, see if it verified... */
4954 /* Restart the timer if we have pending data */
4955 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4956 if (chk->whoTo != NULL) {
4961 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4965 case SCTP_COOKIE_ACK:
4966 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4967 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4970 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4971 /* We are not interested anymore */
4972 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4975 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4976 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
4981 if ((netp != NULL) && (*netp != NULL)) {
4982 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
4986 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
4987 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
4992 if (stcb->asoc.ecn_supported == 0) {
4995 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
4999 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5000 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5004 if (stcb->asoc.ecn_supported == 0) {
5007 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5009 case SCTP_SHUTDOWN_COMPLETE:
5010 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5011 /* must be first and only chunk */
5012 if ((num_chunks > 1) ||
5013 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5017 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5018 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5025 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5027 if (stcb->asoc.asconf_supported == 0) {
5030 sctp_handle_asconf(m, *offset, src,
5031 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5035 case SCTP_ASCONF_ACK:
5036 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5037 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5042 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5043 if (stcb->asoc.asconf_supported == 0) {
5046 /* He's alive so give him credit */
5047 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5048 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5049 stcb->asoc.overall_error_count,
5051 SCTP_FROM_SCTP_INPUT,
5054 stcb->asoc.overall_error_count = 0;
5055 sctp_handle_asconf_ack(m, *offset,
5056 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5057 if (abort_no_unlock)
5061 case SCTP_FORWARD_CUM_TSN:
5062 case SCTP_IFORWARD_CUM_TSN:
5063 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5064 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5065 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5074 if (stcb->asoc.prsctp_supported == 0) {
5077 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5078 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5079 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5080 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5082 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5084 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5085 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
5090 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5091 /* We are not interested anymore */
5092 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5093 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5098 * For sending a SACK this looks like DATA
5101 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5102 sctp_handle_forward_tsn(stcb,
5103 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5110 case SCTP_STREAM_RESET:
5111 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5112 if ((stcb == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req))) {
5117 if (stcb->asoc.reconfig_supported == 0) {
5120 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5121 /* stop processing */
5126 case SCTP_PACKET_DROPPED:
5127 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5128 /* re-get it all please */
5129 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5135 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5136 if (stcb->asoc.pktdrop_supported == 0) {
5139 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5141 min(chk_length, contiguous));
5144 case SCTP_AUTHENTICATION:
5145 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5147 /* save the first AUTH for later processing */
5148 if (auth_skipped == 0) {
5149 auth_offset = *offset;
5150 auth_len = chk_length;
5153 /* skip this chunk (temporarily) */
5156 if (stcb->asoc.auth_supported == 0) {
5159 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5160 (chk_length > (sizeof(struct sctp_auth_chunk) +
5161 SCTP_AUTH_DIGEST_LEN_MAX))) {
5166 if (got_auth == 1) {
5167 /* skip this chunk... it's already auth'd */
5171 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5172 /* auth HMAC failed so dump the packet */
5176 /* remaining chunks are HMAC checked */
5177 stcb->asoc.authenticated = 1;
5183 /* it's an unknown chunk! */
5184 if ((ch->chunk_type & 0x40) &&
5186 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5187 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5188 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5189 struct sctp_gen_error_cause *cause;
5192 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5193 0, M_NOWAIT, 1, MT_DATA);
5194 if (op_err != NULL) {
5195 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5196 cause = mtod(op_err, struct sctp_gen_error_cause *);
5197 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5198 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5199 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5200 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5201 if (SCTP_BUF_NEXT(op_err) != NULL) {
5202 #ifdef SCTP_MBUF_LOGGING
5203 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5204 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5207 sctp_queue_op_err(stcb, op_err);
5209 sctp_m_freem(op_err);
5213 if ((ch->chunk_type & 0x80) == 0) {
5214 /* discard this packet */
5217 } /* else skip this bad chunk and continue... */
5219 } /* switch (ch->chunk_type) */
5222 /* get the next chunk */
5223 *offset += SCTP_SIZE32(chk_length);
5224 if (*offset >= length) {
5225 /* no more data left in the mbuf chain */
5228 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5229 sizeof(struct sctp_chunkhdr), chunk_buf);
5236 if ((asconf_cnt > 0) && (stcb != NULL)) {
5237 sctp_send_asconf_ack(stcb);
5243 * common input chunk processing (v4 and v6)
5246 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5247 struct sockaddr *src, struct sockaddr *dst,
5248 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5249 uint8_t compute_crc,
5251 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5252 uint32_t vrf_id, uint16_t port)
5255 int fwd_tsn_seen = 0, data_processed = 0;
5256 struct mbuf *m = *mm, *op_err;
5257 char msg[SCTP_DIAG_INFO_LEN];
5259 int cnt_ctrl_ready = 0;
5260 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5261 struct sctp_tcb *stcb = NULL;
5262 struct sctp_nets *net = NULL;
5264 SCTP_STAT_INCR(sctps_recvdatagrams);
5265 #ifdef SCTP_AUDITING_ENABLED
5266 sctp_audit_log(0xE0, 1);
5267 sctp_auditing(0, inp, stcb, net);
5269 if (compute_crc != 0) {
5270 uint32_t check, calc_check;
5272 check = sh->checksum;
5274 calc_check = sctp_calculate_cksum(m, iphlen);
5275 sh->checksum = check;
5276 if (calc_check != check) {
5277 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5278 calc_check, check, (void *)m, length, iphlen);
5279 stcb = sctp_findassociation_addr(m, offset, src, dst,
5280 sh, ch, &inp, &net, vrf_id);
5281 #if defined(INET) || defined(INET6)
5282 if ((ch->chunk_type != SCTP_INITIATION) &&
5283 (net != NULL) && (net->port != port)) {
5284 if (net->port == 0) {
5285 /* UDP encapsulation turned on. */
5286 net->mtu -= sizeof(struct udphdr);
5287 if (stcb->asoc.smallest_mtu > net->mtu) {
5288 sctp_pathmtu_adjustment(stcb, net->mtu);
5290 } else if (port == 0) {
5291 /* UDP encapsulation turned off. */
5292 net->mtu += sizeof(struct udphdr);
5293 /* XXX Update smallest_mtu */
5299 net->flowtype = mflowtype;
5300 net->flowid = mflowid;
5302 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5303 if ((inp != NULL) && (stcb != NULL)) {
5304 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5305 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5306 } else if ((inp != NULL) && (stcb == NULL)) {
5309 SCTP_STAT_INCR(sctps_badsum);
5310 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5314 /* Destination port of 0 is illegal, based on RFC4960. */
5315 if (sh->dest_port == 0) {
5316 SCTP_STAT_INCR(sctps_hdrops);
5319 stcb = sctp_findassociation_addr(m, offset, src, dst,
5320 sh, ch, &inp, &net, vrf_id);
5321 #if defined(INET) || defined(INET6)
5322 if ((ch->chunk_type != SCTP_INITIATION) &&
5323 (net != NULL) && (net->port != port)) {
5324 if (net->port == 0) {
5325 /* UDP encapsulation turned on. */
5326 net->mtu -= sizeof(struct udphdr);
5327 if (stcb->asoc.smallest_mtu > net->mtu) {
5328 sctp_pathmtu_adjustment(stcb, net->mtu);
5330 } else if (port == 0) {
5331 /* UDP encapsulation turned off. */
5332 net->mtu += sizeof(struct udphdr);
5333 /* XXX Update smallest_mtu */
5339 net->flowtype = mflowtype;
5340 net->flowid = mflowid;
5343 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5344 SCTP_STAT_INCR(sctps_noport);
5345 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5348 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5349 sctp_send_shutdown_complete2(src, dst, sh,
5350 mflowtype, mflowid, fibnum,
5354 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5357 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5358 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5359 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5360 (ch->chunk_type != SCTP_INIT))) {
5361 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5363 sctp_send_abort(m, iphlen, src, dst,
5365 mflowtype, mflowid, fibnum,
5370 } else if (stcb == NULL) {
5373 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5374 (void *)m, iphlen, offset, length, (void *)stcb);
5376 /* always clear this before beginning a packet */
5377 stcb->asoc.authenticated = 0;
5378 stcb->asoc.seen_a_sack_this_pkt = 0;
5379 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5380 (void *)stcb, stcb->asoc.state);
5382 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5383 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5385 * If we hit here, we had a ref count
5386 * up when the assoc was aborted and the
5387 * timer is clearing out the assoc, we should
5388 * NOT respond to any packet.. its OOTB.
5390 SCTP_TCB_UNLOCK(stcb);
5392 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5393 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5394 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5396 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5397 mflowtype, mflowid, inp->fibnum,
5402 if (IS_SCTP_CONTROL(ch)) {
5403 /* process the control portion of the SCTP packet */
5404 /* sa_ignore NO_NULL_CHK */
5405 stcb = sctp_process_control(m, iphlen, &offset, length,
5407 inp, stcb, &net, &fwd_tsn_seen,
5408 mflowtype, mflowid, fibnum,
5412 * This covers us if the cookie-echo was there and
5413 * it changes our INP.
5415 inp = stcb->sctp_ep;
5416 #if defined(INET) || defined(INET6)
5417 if ((ch->chunk_type != SCTP_INITIATION) &&
5418 (net != NULL) && (net->port != port)) {
5419 if (net->port == 0) {
5420 /* UDP encapsulation turned on. */
5421 net->mtu -= sizeof(struct udphdr);
5422 if (stcb->asoc.smallest_mtu > net->mtu) {
5423 sctp_pathmtu_adjustment(stcb, net->mtu);
5425 } else if (port == 0) {
5426 /* UDP encapsulation turned off. */
5427 net->mtu += sizeof(struct udphdr);
5428 /* XXX Update smallest_mtu */
5436 * no control chunks, so pre-process DATA chunks (these
5437 * checks are taken care of by control processing)
5441 * if DATA only packet, and auth is required, then punt...
5442 * can't have authenticated without any AUTH (control)
5445 if ((stcb != NULL) &&
5446 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5447 /* "silently" ignore */
5448 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5449 SCTP_STAT_INCR(sctps_recvauthmissing);
5453 /* out of the blue DATA chunk */
5454 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5455 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5456 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5458 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5459 mflowtype, mflowid, fibnum,
5463 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5464 /* v_tag mismatch! */
5465 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5466 SCTP_STAT_INCR(sctps_badvtag);
5471 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5474 * no valid TCB for this packet, or we found it's a bad
5475 * packet while processing control, or we're done with this
5476 * packet (done or skip rest of data), so we drop it...
5482 * DATA chunk processing
5484 /* plow through the data chunks while length > offset */
5487 * Rest should be DATA only. Check authentication state if AUTH for
5490 if ((length > offset) &&
5492 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5493 !stcb->asoc.authenticated) {
5494 /* "silently" ignore */
5495 SCTP_STAT_INCR(sctps_recvauthmissing);
5496 SCTPDBG(SCTP_DEBUG_AUTH1,
5497 "Data chunk requires AUTH, skipped\n");
5500 if (length > offset) {
5504 * First check to make sure our state is correct. We would
5505 * not get here unless we really did have a tag, so we don't
5506 * abort if this happens, just dump the chunk silently.
5508 switch (SCTP_GET_STATE(stcb)) {
5509 case SCTP_STATE_COOKIE_ECHOED:
5511 * we consider data with valid tags in this state
5512 * shows us the cookie-ack was lost. Imply it was
5515 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5517 case SCTP_STATE_COOKIE_WAIT:
5519 * We consider OOTB any data sent during asoc setup.
5521 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5522 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5524 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5525 mflowtype, mflowid, inp->fibnum,
5528 /* sa_ignore NOTREACHED */
5530 case SCTP_STATE_EMPTY: /* should not happen */
5531 case SCTP_STATE_INUSE: /* should not happen */
5532 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5533 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5536 /* sa_ignore NOTREACHED */
5538 case SCTP_STATE_OPEN:
5539 case SCTP_STATE_SHUTDOWN_SENT:
5542 /* plow through the data chunks while length > offset */
5543 retval = sctp_process_data(mm, iphlen, &offset, length,
5544 inp, stcb, net, &high_tsn);
5547 * The association aborted, NO UNLOCK needed since
5548 * the association is destroyed.
5557 * Anything important needs to have been m_copy'ed in
5562 /* take care of ecn */
5563 if ((data_processed == 1) &&
5564 (stcb->asoc.ecn_supported == 1) &&
5565 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5566 /* Yep, we need to add a ECNE */
5567 sctp_send_ecn_echo(stcb, net, high_tsn);
5570 if ((data_processed == 0) && (fwd_tsn_seen)) {
5572 uint32_t highest_tsn;
5574 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5575 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5577 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5579 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5580 stcb->asoc.send_sack = 1;
5581 sctp_sack_check(stcb, was_a_gap);
5582 } else if (fwd_tsn_seen) {
5583 stcb->asoc.send_sack = 1;
5585 /* trigger send of any chunks in queue... */
5587 #ifdef SCTP_AUDITING_ENABLED
5588 sctp_audit_log(0xE0, 2);
5589 sctp_auditing(1, inp, stcb, net);
5591 SCTPDBG(SCTP_DEBUG_INPUT1,
5592 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5593 stcb->asoc.peers_rwnd,
5594 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5595 stcb->asoc.total_flight);
5596 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5597 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5598 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5600 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5602 stcb->asoc.trigger_reset ||
5604 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5605 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5606 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5607 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5609 #ifdef SCTP_AUDITING_ENABLED
5610 sctp_audit_log(0xE0, 3);
5611 sctp_auditing(2, inp, stcb, net);
5615 SCTP_TCB_UNLOCK(stcb);
5617 if (inp_decr != NULL) {
5618 /* reduce ref-count */
5619 SCTP_INP_WLOCK(inp_decr);
5620 SCTP_INP_DECR_REF(inp_decr);
5621 SCTP_INP_WUNLOCK(inp_decr);
5628 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5632 uint32_t vrf_id = 0;
5634 struct sockaddr_in src, dst;
5637 struct sctp_chunkhdr *ch;
5639 uint8_t compute_crc;
5645 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5646 SCTP_RELEASE_PKT(i_pak);
5649 m = SCTP_HEADER_TO_CHAIN(i_pak);
5650 #ifdef SCTP_MBUF_LOGGING
5651 /* Log in any input mbufs */
5652 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5653 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5656 #ifdef SCTP_PACKET_LOGGING
5657 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5661 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5662 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5664 if_name(m->m_pkthdr.rcvif),
5665 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5666 mflowid = m->m_pkthdr.flowid;
5667 mflowtype = M_HASHTYPE_GET(m);
5668 fibnum = M_GETFIB(m);
5669 SCTP_STAT_INCR(sctps_recvpackets);
5670 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5671 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5672 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5673 if (SCTP_BUF_LEN(m) < offset) {
5674 if ((m = m_pullup(m, offset)) == NULL) {
5675 SCTP_STAT_INCR(sctps_hdrops);
5679 ip = mtod(m, struct ip *);
5680 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5681 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5682 offset -= sizeof(struct sctp_chunkhdr);
5683 memset(&src, 0, sizeof(struct sockaddr_in));
5684 src.sin_family = AF_INET;
5685 src.sin_len = sizeof(struct sockaddr_in);
5686 src.sin_port = sh->src_port;
5687 src.sin_addr = ip->ip_src;
5688 memset(&dst, 0, sizeof(struct sockaddr_in));
5689 dst.sin_family = AF_INET;
5690 dst.sin_len = sizeof(struct sockaddr_in);
5691 dst.sin_port = sh->dest_port;
5692 dst.sin_addr = ip->ip_dst;
5693 length = ntohs(ip->ip_len);
5694 /* Validate mbuf chain length with IP payload length. */
5695 if (SCTP_HEADER_LEN(m) != length) {
5696 SCTPDBG(SCTP_DEBUG_INPUT1,
5697 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5698 SCTP_STAT_INCR(sctps_hdrops);
5701 /* SCTP does not allow broadcasts or multicasts */
5702 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5705 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5708 ecn_bits = ip->ip_tos;
5709 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5710 SCTP_STAT_INCR(sctps_recvhwcrc);
5713 SCTP_STAT_INCR(sctps_recvswcrc);
5716 sctp_common_input_processing(&m, iphlen, offset, length,
5717 (struct sockaddr *)&src,
5718 (struct sockaddr *)&dst,
5722 mflowtype, mflowid, fibnum,
5731 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5732 extern int *sctp_cpuarry;
5736 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5743 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5749 uint32_t flowid, tag;
5751 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5752 flowid = m->m_pkthdr.flowid;
5755 * No flow id built by lower layers fix it so we
5758 offset = off + sizeof(struct sctphdr);
5759 if (SCTP_BUF_LEN(m) < offset) {
5760 if ((m = m_pullup(m, offset)) == NULL) {
5761 SCTP_STAT_INCR(sctps_hdrops);
5762 return (IPPROTO_DONE);
5765 ip = mtod(m, struct ip *);
5766 sh = (struct sctphdr *)((caddr_t)ip + off);
5767 tag = htonl(sh->v_tag);
5768 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5769 m->m_pkthdr.flowid = flowid;
5770 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5772 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5773 sctp_queue_to_mcore(m, off, cpu_to_use);
5774 return (IPPROTO_DONE);
5777 sctp_input_with_port(m, off, 0);
5778 return (IPPROTO_DONE);