2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
37 #include <netinet/sctp_var.h>
38 #include <netinet/sctp_sysctl.h>
39 #include <netinet/sctp_pcb.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctputil.h>
42 #include <netinet/sctp_output.h>
43 #include <netinet/sctp_input.h>
44 #include <netinet/sctp_auth.h>
45 #include <netinet/sctp_indata.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctp_bsd_addr.h>
48 #include <netinet/sctp_timer.h>
49 #include <netinet/sctp_crc32.h>
50 #if defined(INET) || defined(INET6)
51 #include <netinet/udp.h>
58 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
60 struct sctp_nets *net;
63 * This now not only stops all cookie timers it also stops any INIT
64 * timers as well. This will make sure that the timers are stopped
65 * in all collision cases.
67 SCTP_TCB_LOCK_ASSERT(stcb);
68 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
69 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
70 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
73 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
74 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
75 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
78 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
85 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
86 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
87 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
88 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_no_unlock,
89 uint8_t mflowtype, uint32_t mflowid,
90 uint32_t vrf_id, uint16_t port)
92 struct sctp_init *init;
95 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
100 /* validate length */
101 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
102 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
103 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
107 *abort_no_unlock = 1;
110 /* validate parameters */
112 if (init->initiate_tag == 0) {
113 /* protocol error... send abort */
114 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
115 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
119 *abort_no_unlock = 1;
122 if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
123 /* invalid parameter... send abort */
124 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
125 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
129 *abort_no_unlock = 1;
132 if (init->num_inbound_streams == 0) {
133 /* protocol error... send abort */
134 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
135 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
139 *abort_no_unlock = 1;
142 if (init->num_outbound_streams == 0) {
143 /* protocol error... send abort */
144 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
145 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
149 *abort_no_unlock = 1;
152 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
153 offset + ntohs(cp->ch.chunk_length))) {
154 /* auth parameter(s) error... send abort */
155 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
156 "Problem with AUTH parameters");
157 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
161 *abort_no_unlock = 1;
164 /* We are only accepting if we have a socket with positive
166 if ((stcb == NULL) &&
167 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
168 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
169 (inp->sctp_socket == NULL) ||
170 (inp->sctp_socket->so_qlimit == 0))) {
172 * FIX ME ?? What about TCP model and we have a
173 * match/restart case? Actually no fix is needed. the lookup
174 * will always find the existing assoc so stcb would not be
175 * NULL. It may be questionable to do this since we COULD
176 * just send back the INIT-ACK and hope that the app did
177 * accept()'s by the time the COOKIE was sent. But there is
178 * a price to pay for COOKIE generation and I don't want to
179 * pay it on the chance that the app will actually do some
180 * accepts(). The App just looses and should NOT be in this
183 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
184 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
186 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
187 mflowtype, mflowid, inp->fibnum,
192 if ((stcb != NULL) &&
193 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
194 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
195 sctp_send_shutdown_ack(stcb, NULL);
196 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
198 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
199 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
203 ((stcb == NULL) ? SCTP_HOLDS_LOCK : SCTP_NOT_LOCKED));
207 SCTP_INP_RUNLOCK(inp);
212 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
216 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
217 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
224 struct sctp_stream_queue_pending *sp;
225 struct sctp_association *asoc;
228 * This function returns if any stream has true unsent data on it.
229 * Note that as it looks through it will clean up any places that
230 * have old data that has been sent but left at top of stream queue.
234 SCTP_TCB_SEND_LOCK(stcb);
235 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
236 /* Check to see if some data queued */
237 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
238 /* sa_ignore FREED_MEMORY */
239 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
243 if ((sp->msg_is_complete) &&
245 (sp->sender_all_done)) {
247 * We are doing differed cleanup. Last time
248 * through when we took all the data the
249 * sender_all_done was not set.
251 if (sp->put_last_out == 0) {
252 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
253 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
259 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
260 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
261 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp, 1);
263 sctp_free_remote_addr(sp->net);
267 sctp_m_freem(sp->data);
270 sctp_free_a_strmoq(stcb, sp, so_locked);
271 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
277 if (unsent_data > 0) {
282 SCTP_TCB_SEND_UNLOCK(stcb);
283 return (unsent_data);
287 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
289 struct sctp_init *init;
290 struct sctp_association *asoc;
291 struct sctp_nets *lnet;
296 /* save off parameters */
297 asoc->peer_vtag = ntohl(init->initiate_tag);
298 asoc->peers_rwnd = ntohl(init->a_rwnd);
300 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
302 if (!TAILQ_EMPTY(&asoc->nets)) {
303 /* update any ssthresh's that may have a default */
304 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
305 lnet->ssthresh = asoc->peers_rwnd;
306 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
307 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
311 SCTP_TCB_SEND_LOCK(stcb);
312 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
314 struct sctp_stream_out *outs;
315 struct sctp_stream_queue_pending *sp, *nsp;
316 struct sctp_tmit_chunk *chk, *nchk;
318 /* abandon the upper streams */
319 newcnt = ntohs(init->num_inbound_streams);
320 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
321 if (chk->rec.data.sid >= newcnt) {
322 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
323 asoc->send_queue_cnt--;
324 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
325 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
328 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
331 if (chk->data != NULL) {
332 sctp_free_bufspace(stcb, asoc, chk, 1);
333 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
334 0, chk, SCTP_SO_NOT_LOCKED);
336 sctp_m_freem(chk->data);
340 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
341 /* sa_ignore FREED_MEMORY */
345 for (i = newcnt; i < asoc->pre_open_streams; i++) {
346 outs = &asoc->strmout[i];
347 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
348 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
349 TAILQ_REMOVE(&outs->outqueue, sp, next);
350 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
351 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
352 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
354 sctp_m_freem(sp->data);
358 sctp_free_remote_addr(sp->net);
362 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
363 /* sa_ignore FREED_MEMORY */
365 outs->state = SCTP_STREAM_CLOSED;
368 /* cut back the count */
369 asoc->pre_open_streams = newcnt;
371 SCTP_TCB_SEND_UNLOCK(stcb);
372 asoc->streamoutcnt = asoc->pre_open_streams;
374 for (i = 0; i < asoc->streamoutcnt; i++) {
375 asoc->strmout[i].state = SCTP_STREAM_OPEN;
378 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
379 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
380 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
381 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
383 /* This is the next one we expect */
384 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
386 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
387 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
389 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
390 /* open the requested streams */
392 if (asoc->strmin != NULL) {
393 /* Free the old ones */
394 for (i = 0; i < asoc->streamincnt; i++) {
395 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
396 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
398 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
400 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
401 asoc->streamincnt = ntohs(init->num_outbound_streams);
403 asoc->streamincnt = asoc->max_inbound_streams;
405 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
406 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
407 if (asoc->strmin == NULL) {
408 /* we didn't get memory for the streams! */
409 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
412 for (i = 0; i < asoc->streamincnt; i++) {
413 asoc->strmin[i].sid = i;
414 asoc->strmin[i].last_mid_delivered = 0xffffffff;
415 TAILQ_INIT(&asoc->strmin[i].inqueue);
416 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
417 asoc->strmin[i].pd_api_started = 0;
418 asoc->strmin[i].delivery_started = 0;
421 * load_address_from_init will put the addresses into the
422 * association when the COOKIE is processed or the INIT-ACK is
423 * processed. Both types of COOKIE's existing and new call this
424 * routine. It will remove addresses that are no longer in the
425 * association (for the restarting case where addresses are
426 * removed). Up front when the INIT arrives we will discard it if it
427 * is a restart and new addresses have been added.
429 /* sa_ignore MEMLEAK */
434 * INIT-ACK message processing/consumption returns value < 0 on error
437 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
438 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
439 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
440 struct sctp_nets *net, int *abort_no_unlock,
441 uint8_t mflowtype, uint32_t mflowid,
444 struct sctp_association *asoc;
446 int retval, abort_flag;
447 uint32_t initack_limit;
448 int nat_friendly = 0;
450 /* First verify that we have no illegal param's */
453 op_err = sctp_arethere_unrecognized_parameters(m,
454 (offset + sizeof(struct sctp_init_chunk)),
455 &abort_flag, (struct sctp_chunkhdr *)cp, &nat_friendly);
457 /* Send an abort and notify peer */
458 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
459 *abort_no_unlock = 1;
463 asoc->peer_supports_nat = (uint8_t)nat_friendly;
464 /* process the peer's parameters in the INIT-ACK */
465 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
469 initack_limit = offset + ntohs(cp->ch.chunk_length);
470 /* load all addresses */
471 if ((retval = sctp_load_addresses_from_init(stcb, m,
472 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
473 src, dst, NULL, stcb->asoc.port))) {
474 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
475 "Problem with address parameters");
476 SCTPDBG(SCTP_DEBUG_INPUT1,
477 "Load addresses from INIT causes an abort %d\n",
479 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
480 src, dst, sh, op_err,
483 *abort_no_unlock = 1;
486 /* if the peer doesn't support asconf, flush the asconf queue */
487 if (asoc->asconf_supported == 0) {
488 struct sctp_asconf_addr *param, *nparam;
490 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
491 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
492 SCTP_FREE(param, SCTP_M_ASC_ADDR);
495 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
496 stcb->asoc.local_hmacs);
498 sctp_queue_op_err(stcb, op_err);
499 /* queuing will steal away the mbuf chain to the out queue */
502 /* extract the cookie and queue it to "echo" it back... */
503 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
504 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
505 stcb->asoc.overall_error_count,
507 SCTP_FROM_SCTP_INPUT,
510 stcb->asoc.overall_error_count = 0;
511 net->error_count = 0;
514 * Cancel the INIT timer, We do this first before queueing the
515 * cookie. We always cancel at the primary to assue that we are
516 * canceling the timer started by the INIT which always goes to the
519 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
520 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
522 /* calculate the RTO */
523 net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered, sctp_align_safe_nocopy,
524 SCTP_RTT_FROM_NON_DATA);
525 retval = sctp_send_cookie_echo(m, offset, stcb, net);
528 * No cookie, we probably should send a op error. But in any
529 * case if there is no cookie in the INIT-ACK, we can
530 * abandon the peer, its broke.
535 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
536 /* We abort with an error of missing mandatory param */
537 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
538 if (op_err != NULL) {
539 struct sctp_error_missing_param *cause;
541 SCTP_BUF_LEN(op_err) = len;
542 cause = mtod(op_err, struct sctp_error_missing_param *);
543 /* Subtract the reserved param */
544 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
545 cause->cause.length = htons(len);
546 cause->num_missing_params = htonl(1);
547 cause->type[0] = htons(SCTP_STATE_COOKIE);
549 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
550 src, dst, sh, op_err,
553 *abort_no_unlock = 1;
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)) {
574 memset(&store, 0, sizeof(store));
575 switch (cp->heartbeat.hb_info.addr_family) {
578 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
579 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
580 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
581 store.sin.sin_port = stcb->rport;
582 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
583 sizeof(store.sin.sin_addr));
591 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
592 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
593 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
594 store.sin6.sin6_port = stcb->rport;
595 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
604 r_net = sctp_findnet(stcb, &store.sa);
606 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
609 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
610 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
611 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
613 * If the its a HB and it's random value is correct when can
614 * confirm the destination.
616 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
617 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
618 stcb->asoc.primary_destination = r_net;
619 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
620 f_net = TAILQ_FIRST(&stcb->asoc.nets);
621 if (f_net != r_net) {
623 * first one on the list is NOT the primary
624 * sctp_cmpaddr() is much more efficient if
625 * the primary is the first on the list,
628 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
629 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
633 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
634 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
635 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
636 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
637 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
639 old_error_counter = r_net->error_count;
640 r_net->error_count = 0;
641 r_net->hb_responded = 1;
642 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
643 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
644 /* Now lets do a RTO with this */
645 r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv, sctp_align_safe_nocopy,
646 SCTP_RTT_FROM_NON_DATA);
647 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
648 r_net->dest_state |= SCTP_ADDR_REACHABLE;
649 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
650 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
652 if (r_net->dest_state & SCTP_ADDR_PF) {
653 r_net->dest_state &= ~SCTP_ADDR_PF;
654 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
656 if (old_error_counter > 0) {
657 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
658 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
659 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
661 if (r_net == stcb->asoc.primary_destination) {
662 if (stcb->asoc.alternate) {
663 /* release the alternate, primary is good */
664 sctp_free_remote_addr(stcb->asoc.alternate);
665 stcb->asoc.alternate = NULL;
668 /* Mobility adaptation */
670 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
671 SCTP_MOBILITY_BASE) ||
672 sctp_is_mobility_feature_on(stcb->sctp_ep,
673 SCTP_MOBILITY_FASTHANDOFF)) &&
674 sctp_is_mobility_feature_on(stcb->sctp_ep,
675 SCTP_MOBILITY_PRIM_DELETED)) {
677 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
678 stcb->sctp_ep, stcb, NULL,
679 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
680 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
681 SCTP_MOBILITY_FASTHANDOFF)) {
682 sctp_assoc_immediate_retrans(stcb,
683 stcb->asoc.primary_destination);
685 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
686 SCTP_MOBILITY_BASE)) {
687 sctp_move_chunks_from_net(stcb,
688 stcb->asoc.deleted_primary);
690 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
691 stcb->asoc.deleted_primary);
697 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
700 * return 0 means we want you to proceed with the abort non-zero
701 * means no abort processing
703 struct sctpasochead *head;
705 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
706 /* generate a new vtag and send init */
707 LIST_REMOVE(stcb, sctp_asocs);
708 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
709 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
711 * put it in the bucket in the vtag hash of assoc's for the
714 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
715 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
718 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
720 * treat like a case where the cookie expired i.e.: - dump
721 * current cookie. - generate a new vtag. - resend init.
723 /* generate a new vtag and send init */
724 LIST_REMOVE(stcb, sctp_asocs);
725 stcb->asoc.state &= ~SCTP_STATE_COOKIE_ECHOED;
726 stcb->asoc.state |= SCTP_STATE_COOKIE_WAIT;
727 sctp_stop_all_cookie_timers(stcb);
728 sctp_toss_old_cookies(stcb, &stcb->asoc);
729 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
730 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
732 * put it in the bucket in the vtag hash of assoc's for the
735 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
736 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
743 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
744 struct sctp_nets *net)
747 * return 0 means we want you to proceed with the abort non-zero
748 * means no abort processing
750 if (stcb->asoc.auth_supported == 0) {
751 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
754 sctp_asconf_send_nat_state_update(stcb, net);
760 sctp_handle_abort(struct sctp_abort_chunk *abort,
761 struct sctp_tcb *stcb, struct sctp_nets *net)
763 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
769 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
773 len = ntohs(abort->ch.chunk_length);
774 if (len > sizeof(struct sctp_chunkhdr)) {
776 * Need to check the cause codes for our two magic nat
777 * aborts which don't kill the assoc necessarily.
779 struct sctp_gen_error_cause *cause;
781 cause = (struct sctp_gen_error_cause *)(abort + 1);
782 error = ntohs(cause->code);
783 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
784 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
785 abort->ch.chunk_flags);
786 if (sctp_handle_nat_colliding_state(stcb)) {
789 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
790 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
791 abort->ch.chunk_flags);
792 if (sctp_handle_nat_missing_state(stcb, net)) {
799 /* stop any receive timers */
800 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net,
801 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
802 /* notify user of the abort and clean up... */
803 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
805 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
806 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
807 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
808 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
810 #ifdef SCTP_ASOCLOG_OF_TSNS
811 sctp_print_out_track_log(stcb);
813 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
814 so = SCTP_INP_SO(stcb->sctp_ep);
815 atomic_add_int(&stcb->asoc.refcnt, 1);
816 SCTP_TCB_UNLOCK(stcb);
817 SCTP_SOCKET_LOCK(so, 1);
819 atomic_subtract_int(&stcb->asoc.refcnt, 1);
821 stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
822 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
823 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
824 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
825 SCTP_SOCKET_UNLOCK(so, 1);
827 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
831 sctp_start_net_timers(struct sctp_tcb *stcb)
833 uint32_t cnt_hb_sent;
834 struct sctp_nets *net;
837 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
839 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
840 * If the dest in unconfirmed send a hb as well if under
841 * max_hb_burst have been sent.
843 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
844 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
845 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
846 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
847 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
852 sctp_chunk_output(stcb->sctp_ep, stcb,
853 SCTP_OUTPUT_FROM_COOKIE_ACK,
860 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
861 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
863 struct sctp_association *asoc;
864 int some_on_streamwheel;
866 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
870 SCTPDBG(SCTP_DEBUG_INPUT2,
871 "sctp_handle_shutdown: handling SHUTDOWN\n");
875 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
876 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
879 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
880 /* Shutdown NOT the expected size */
883 old_state = SCTP_GET_STATE(asoc);
884 sctp_update_acked(stcb, cp, abort_flag);
888 if (asoc->control_pdapi) {
890 * With a normal shutdown we assume the end of last record.
892 SCTP_INP_READ_LOCK(stcb->sctp_ep);
893 if (asoc->control_pdapi->on_strm_q) {
894 struct sctp_stream_in *strm;
896 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
897 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
899 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
900 asoc->control_pdapi->on_strm_q = 0;
901 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
903 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
904 asoc->control_pdapi->on_strm_q = 0;
907 panic("Unknown state on ctrl:%p on_strm_q:%d",
909 asoc->control_pdapi->on_strm_q);
913 asoc->control_pdapi->end_added = 1;
914 asoc->control_pdapi->pdapi_aborted = 1;
915 asoc->control_pdapi = NULL;
916 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
917 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
918 so = SCTP_INP_SO(stcb->sctp_ep);
919 atomic_add_int(&stcb->asoc.refcnt, 1);
920 SCTP_TCB_UNLOCK(stcb);
921 SCTP_SOCKET_LOCK(so, 1);
923 atomic_subtract_int(&stcb->asoc.refcnt, 1);
924 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
925 /* assoc was freed while we were unlocked */
926 SCTP_SOCKET_UNLOCK(so, 1);
930 if (stcb->sctp_socket) {
931 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
933 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
934 SCTP_SOCKET_UNLOCK(so, 1);
937 /* goto SHUTDOWN_RECEIVED state to block new requests */
938 if (stcb->sctp_socket) {
939 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
940 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
941 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
942 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_RECEIVED);
943 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
945 * notify upper layer that peer has initiated a
948 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
951 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
954 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) {
956 * stop the shutdown timer, since we WILL move to
959 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
960 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
962 /* Now is there unsent data on a stream somewhere? */
963 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
965 if (!TAILQ_EMPTY(&asoc->send_queue) ||
966 !TAILQ_EMPTY(&asoc->sent_queue) ||
967 some_on_streamwheel) {
968 /* By returning we will push more data out */
971 /* no outstanding data to send, so move on... */
972 /* send SHUTDOWN-ACK */
973 /* move to SHUTDOWN-ACK-SENT state */
974 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
975 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
976 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
978 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
979 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
980 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
981 sctp_stop_timers_for_shutdown(stcb);
982 sctp_send_shutdown_ack(stcb, net);
983 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
984 stcb->sctp_ep, stcb, net);
985 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
986 sctp_send_shutdown_ack(stcb, net);
992 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
993 struct sctp_tcb *stcb,
994 struct sctp_nets *net)
996 struct sctp_association *asoc;
997 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1000 so = SCTP_INP_SO(stcb->sctp_ep);
1002 SCTPDBG(SCTP_DEBUG_INPUT2,
1003 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
1008 /* process according to association state */
1009 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
1010 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
1011 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
1012 sctp_send_shutdown_complete(stcb, net, 1);
1013 SCTP_TCB_UNLOCK(stcb);
1016 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
1017 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
1018 /* unexpected SHUTDOWN-ACK... so ignore... */
1019 SCTP_TCB_UNLOCK(stcb);
1022 if (asoc->control_pdapi) {
1024 * With a normal shutdown we assume the end of last record.
1026 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1027 asoc->control_pdapi->end_added = 1;
1028 asoc->control_pdapi->pdapi_aborted = 1;
1029 asoc->control_pdapi = NULL;
1030 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1031 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1032 atomic_add_int(&stcb->asoc.refcnt, 1);
1033 SCTP_TCB_UNLOCK(stcb);
1034 SCTP_SOCKET_LOCK(so, 1);
1035 SCTP_TCB_LOCK(stcb);
1036 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1037 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1038 /* assoc was freed while we were unlocked */
1039 SCTP_SOCKET_UNLOCK(so, 1);
1043 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1044 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1045 SCTP_SOCKET_UNLOCK(so, 1);
1049 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1050 !TAILQ_EMPTY(&asoc->sent_queue) ||
1051 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
1052 panic("Queues are not empty when handling SHUTDOWN-ACK");
1055 /* stop the timer */
1056 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
1057 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1058 /* send SHUTDOWN-COMPLETE */
1059 sctp_send_shutdown_complete(stcb, net, 0);
1060 /* notify upper layer protocol */
1061 if (stcb->sctp_socket) {
1062 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1063 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1064 stcb->sctp_socket->so_snd.sb_cc = 0;
1066 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1068 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1069 /* free the TCB but first save off the ep */
1070 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1071 atomic_add_int(&stcb->asoc.refcnt, 1);
1072 SCTP_TCB_UNLOCK(stcb);
1073 SCTP_SOCKET_LOCK(so, 1);
1074 SCTP_TCB_LOCK(stcb);
1075 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1077 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1078 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1079 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1080 SCTP_SOCKET_UNLOCK(so, 1);
1085 * Skip past the param header and then we will find the chunk that caused the
1086 * problem. There are two possibilities ASCONF or FWD-TSN other than that and
1087 * our peer must be broken.
1090 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr,
1091 struct sctp_nets *net)
1093 struct sctp_chunkhdr *chk;
1095 chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr));
1096 switch (chk->chunk_type) {
1097 case SCTP_ASCONF_ACK:
1099 sctp_asconf_cleanup(stcb, net);
1101 case SCTP_IFORWARD_CUM_TSN:
1102 case SCTP_FORWARD_CUM_TSN:
1103 stcb->asoc.prsctp_supported = 0;
1106 SCTPDBG(SCTP_DEBUG_INPUT2,
1107 "Peer does not support chunk type %d(%x)??\n",
1108 chk->chunk_type, (uint32_t)chk->chunk_type);
1114 * Skip past the param header and then we will find the param that caused the
1115 * problem. There are a number of param's in a ASCONF OR the prsctp param
1116 * these will turn of specific features.
1117 * XXX: Is this the right thing to do?
1120 sctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr)
1122 struct sctp_paramhdr *pbad;
1125 switch (ntohs(pbad->param_type)) {
1127 case SCTP_PRSCTP_SUPPORTED:
1128 stcb->asoc.prsctp_supported = 0;
1130 case SCTP_SUPPORTED_CHUNK_EXT:
1132 /* draft-ietf-tsvwg-addip-sctp */
1133 case SCTP_HAS_NAT_SUPPORT:
1134 stcb->asoc.peer_supports_nat = 0;
1136 case SCTP_ADD_IP_ADDRESS:
1137 case SCTP_DEL_IP_ADDRESS:
1138 case SCTP_SET_PRIM_ADDR:
1139 stcb->asoc.asconf_supported = 0;
1141 case SCTP_SUCCESS_REPORT:
1142 case SCTP_ERROR_CAUSE_IND:
1143 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1144 SCTPDBG(SCTP_DEBUG_INPUT2,
1145 "Turning off ASCONF to this strange peer\n");
1146 stcb->asoc.asconf_supported = 0;
1149 SCTPDBG(SCTP_DEBUG_INPUT2,
1150 "Peer does not support param type %d(%x)??\n",
1151 pbad->param_type, (uint32_t)pbad->param_type);
1157 sctp_handle_error(struct sctp_chunkhdr *ch,
1158 struct sctp_tcb *stcb, struct sctp_nets *net)
1161 struct sctp_paramhdr *phdr;
1162 uint16_t error, error_type;
1164 struct sctp_association *asoc;
1166 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1170 /* parse through all of the errors and process */
1172 phdr = (struct sctp_paramhdr *)((caddr_t)ch +
1173 sizeof(struct sctp_chunkhdr));
1174 chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr);
1176 while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) {
1177 /* Process an Error Cause */
1178 error_type = ntohs(phdr->param_type);
1179 error_len = ntohs(phdr->param_length);
1180 if ((error_len > chklen) || (error_len == 0)) {
1181 /* invalid param length for this param */
1182 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in error param- chunk left:%d errorlen:%d\n",
1187 /* report the first error cause */
1190 switch (error_type) {
1191 case SCTP_CAUSE_INVALID_STREAM:
1192 case SCTP_CAUSE_MISSING_PARAM:
1193 case SCTP_CAUSE_INVALID_PARAM:
1194 case SCTP_CAUSE_NO_USER_DATA:
1195 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %d back? We have a bug :/ (or do they?)\n",
1198 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1199 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
1201 if (sctp_handle_nat_colliding_state(stcb)) {
1205 case SCTP_CAUSE_NAT_MISSING_STATE:
1206 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
1208 if (sctp_handle_nat_missing_state(stcb, net)) {
1212 case SCTP_CAUSE_STALE_COOKIE:
1214 * We only act if we have echoed a cookie and are
1217 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
1220 p = (int *)((caddr_t)phdr + sizeof(*phdr));
1221 /* Save the time doubled */
1222 asoc->cookie_preserve_req = ntohl(*p) << 1;
1223 asoc->stale_cookie_count++;
1224 if (asoc->stale_cookie_count >
1225 asoc->max_init_times) {
1226 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1227 /* now free the asoc */
1228 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1229 so = SCTP_INP_SO(stcb->sctp_ep);
1230 atomic_add_int(&stcb->asoc.refcnt, 1);
1231 SCTP_TCB_UNLOCK(stcb);
1232 SCTP_SOCKET_LOCK(so, 1);
1233 SCTP_TCB_LOCK(stcb);
1234 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1236 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1237 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1238 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1239 SCTP_SOCKET_UNLOCK(so, 1);
1243 /* blast back to INIT state */
1244 sctp_toss_old_cookies(stcb, &stcb->asoc);
1245 asoc->state &= ~SCTP_STATE_COOKIE_ECHOED;
1246 asoc->state |= SCTP_STATE_COOKIE_WAIT;
1247 sctp_stop_all_cookie_timers(stcb);
1248 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1251 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1253 * Nothing we can do here, we don't do hostname
1254 * addresses so if the peer does not like my IPv6
1255 * (or IPv4 for that matter) it does not matter. If
1256 * they don't support that type of address, they can
1257 * NOT possibly get that packet type... i.e. with no
1258 * IPv6 you can't receive a IPv6 packet. so we can
1259 * safely ignore this one. If we ever added support
1260 * for HOSTNAME Addresses, then we would need to do
1264 case SCTP_CAUSE_UNRECOG_CHUNK:
1265 sctp_process_unrecog_chunk(stcb, phdr, net);
1267 case SCTP_CAUSE_UNRECOG_PARAM:
1268 sctp_process_unrecog_param(stcb, phdr);
1270 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1272 * We ignore this since the timer will drive out a
1273 * new cookie anyway and there timer will drive us
1274 * to send a SHUTDOWN_COMPLETE. We can't send one
1275 * here since we don't have their tag.
1278 case SCTP_CAUSE_DELETING_LAST_ADDR:
1279 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1280 case SCTP_CAUSE_DELETING_SRC_ADDR:
1282 * We should NOT get these here, but in a
1285 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a Operational Error?<%d>?\n",
1288 case SCTP_CAUSE_OUT_OF_RESC:
1290 * And what, pray tell do we do with the fact that
1291 * the peer is out of resources? Not really sure we
1292 * could do anything but abort. I suspect this
1293 * should have came WITH an abort instead of in a
1298 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown error type = 0x%xh\n",
1302 adjust = SCTP_SIZE32(error_len);
1304 phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust);
1306 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, error, ch, SCTP_SO_NOT_LOCKED);
1311 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1312 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1313 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1314 struct sctp_nets *net, int *abort_no_unlock,
1315 uint8_t mflowtype, uint32_t mflowid,
1318 struct sctp_init_ack *init_ack;
1319 struct mbuf *op_err;
1321 SCTPDBG(SCTP_DEBUG_INPUT2,
1322 "sctp_handle_init_ack: handling INIT-ACK\n");
1325 SCTPDBG(SCTP_DEBUG_INPUT2,
1326 "sctp_handle_init_ack: TCB is null\n");
1329 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1330 /* Invalid length */
1331 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1332 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1333 src, dst, sh, op_err,
1336 *abort_no_unlock = 1;
1339 init_ack = &cp->init;
1340 /* validate parameters */
1341 if (init_ack->initiate_tag == 0) {
1342 /* protocol error... send an abort */
1343 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1344 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1345 src, dst, sh, op_err,
1348 *abort_no_unlock = 1;
1351 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1352 /* protocol error... send an abort */
1353 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1354 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1355 src, dst, sh, op_err,
1358 *abort_no_unlock = 1;
1361 if (init_ack->num_inbound_streams == 0) {
1362 /* protocol error... send an abort */
1363 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1364 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1365 src, dst, sh, op_err,
1368 *abort_no_unlock = 1;
1371 if (init_ack->num_outbound_streams == 0) {
1372 /* protocol error... send an abort */
1373 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1374 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1375 src, dst, sh, op_err,
1378 *abort_no_unlock = 1;
1381 /* process according to association state... */
1382 switch (stcb->asoc.state & SCTP_STATE_MASK) {
1383 case SCTP_STATE_COOKIE_WAIT:
1384 /* this is the expected state for this chunk */
1385 /* process the INIT-ACK parameters */
1386 if (stcb->asoc.primary_destination->dest_state &
1387 SCTP_ADDR_UNCONFIRMED) {
1389 * The primary is where we sent the INIT, we can
1390 * always consider it confirmed when the INIT-ACK is
1391 * returned. Do this before we load addresses
1394 stcb->asoc.primary_destination->dest_state &=
1395 ~SCTP_ADDR_UNCONFIRMED;
1396 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1397 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1399 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1400 net, abort_no_unlock,
1403 /* error in parsing parameters */
1406 /* update our state */
1407 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1408 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_ECHOED);
1410 /* reset the RTO calc */
1411 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1412 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1413 stcb->asoc.overall_error_count,
1415 SCTP_FROM_SCTP_INPUT,
1418 stcb->asoc.overall_error_count = 0;
1419 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1421 * collapse the init timer back in case of a exponential
1424 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1427 * the send at the end of the inbound data processing will
1428 * cause the cookie to be sent
1431 case SCTP_STATE_SHUTDOWN_SENT:
1432 /* incorrect state... discard */
1434 case SCTP_STATE_COOKIE_ECHOED:
1435 /* incorrect state... discard */
1437 case SCTP_STATE_OPEN:
1438 /* incorrect state... discard */
1440 case SCTP_STATE_EMPTY:
1441 case SCTP_STATE_INUSE:
1443 /* incorrect state... discard */
1447 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1451 static struct sctp_tcb *
1452 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1453 struct sockaddr *src, struct sockaddr *dst,
1454 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1455 struct sctp_inpcb *inp, struct sctp_nets **netp,
1456 struct sockaddr *init_src, int *notification,
1457 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1458 uint8_t mflowtype, uint32_t mflowid,
1459 uint32_t vrf_id, uint16_t port);
1463 * handle a state cookie for an existing association m: input packet mbuf
1464 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1465 * "split" mbuf and the cookie signature does not exist offset: offset into
1466 * mbuf to the cookie-echo chunk
1468 static struct sctp_tcb *
1469 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1470 struct sockaddr *src, struct sockaddr *dst,
1471 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1472 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1473 struct sockaddr *init_src, int *notification,
1474 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1475 uint8_t mflowtype, uint32_t mflowid,
1476 uint32_t vrf_id, uint16_t port)
1478 struct sctp_association *asoc;
1479 struct sctp_init_chunk *init_cp, init_buf;
1480 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1481 struct sctp_nets *net;
1482 struct mbuf *op_err;
1483 int init_offset, initack_offset, i;
1487 #if defined(SCTP_DETAILED_STR_STATS)
1492 /* I know that the TCB is non-NULL from the caller */
1494 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1495 if (asoc->cookie_how[how_indx] == 0)
1498 if (how_indx < sizeof(asoc->cookie_how)) {
1499 asoc->cookie_how[how_indx] = 1;
1501 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1502 /* SHUTDOWN came in after sending INIT-ACK */
1503 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1504 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1505 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1506 mflowtype, mflowid, inp->fibnum,
1508 if (how_indx < sizeof(asoc->cookie_how))
1509 asoc->cookie_how[how_indx] = 2;
1513 * find and validate the INIT chunk in the cookie (peer's info) the
1514 * INIT should start after the cookie-echo header struct (chunk
1515 * header, state cookie header struct)
1517 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1519 init_cp = (struct sctp_init_chunk *)
1520 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1521 (uint8_t *)&init_buf);
1522 if (init_cp == NULL) {
1523 /* could not pull a INIT chunk in cookie */
1526 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1530 * find and validate the INIT-ACK chunk in the cookie (my info) the
1531 * INIT-ACK follows the INIT chunk
1533 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1534 initack_cp = (struct sctp_init_ack_chunk *)
1535 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1536 (uint8_t *)&initack_buf);
1537 if (initack_cp == NULL) {
1538 /* could not pull INIT-ACK chunk in cookie */
1541 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1544 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1545 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1547 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1548 * to get into the OPEN state
1550 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1552 * Opps, this means that we somehow generated two vtag's
1553 * the same. I.e. we did:
1555 * <---INIT(tag=a)------
1556 * ----INIT-ACK(tag=t)-->
1557 * ----INIT(tag=t)------> *1
1558 * <---INIT-ACK(tag=a)---
1559 * <----CE(tag=t)------------- *2
1561 * At point *1 we should be generating a different
1562 * tag t'. Which means we would throw away the CE and send
1563 * ours instead. Basically this is case C (throw away side).
1565 if (how_indx < sizeof(asoc->cookie_how))
1566 asoc->cookie_how[how_indx] = 17;
1570 switch (SCTP_GET_STATE(asoc)) {
1571 case SCTP_STATE_COOKIE_WAIT:
1572 case SCTP_STATE_COOKIE_ECHOED:
1574 * INIT was sent but got a COOKIE_ECHO with the
1575 * correct tags... just accept it...but we must
1576 * process the init so that we can make sure we have
1577 * the right seq no's.
1579 /* First we must process the INIT !! */
1580 retval = sctp_process_init(init_cp, stcb);
1582 if (how_indx < sizeof(asoc->cookie_how))
1583 asoc->cookie_how[how_indx] = 3;
1586 /* we have already processed the INIT so no problem */
1587 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1589 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1590 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1592 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1593 /* update current state */
1594 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1595 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1597 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1599 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1600 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1601 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1602 stcb->sctp_ep, stcb, asoc->primary_destination);
1604 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1605 sctp_stop_all_cookie_timers(stcb);
1606 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1607 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1608 (inp->sctp_socket->so_qlimit == 0)
1610 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1614 * Here is where collision would go if we
1615 * did a connect() and instead got a
1616 * init/init-ack/cookie done before the
1617 * init-ack came back..
1619 stcb->sctp_ep->sctp_flags |=
1620 SCTP_PCB_FLAGS_CONNECTED;
1621 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1622 so = SCTP_INP_SO(stcb->sctp_ep);
1623 atomic_add_int(&stcb->asoc.refcnt, 1);
1624 SCTP_TCB_UNLOCK(stcb);
1625 SCTP_SOCKET_LOCK(so, 1);
1626 SCTP_TCB_LOCK(stcb);
1627 atomic_add_int(&stcb->asoc.refcnt, -1);
1628 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1629 SCTP_SOCKET_UNLOCK(so, 1);
1633 soisconnected(stcb->sctp_socket);
1634 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1635 SCTP_SOCKET_UNLOCK(so, 1);
1638 /* notify upper layer */
1639 *notification = SCTP_NOTIFY_ASSOC_UP;
1641 * since we did not send a HB make sure we don't
1644 net->hb_responded = 1;
1645 net->RTO = sctp_calculate_rto(stcb, asoc, net,
1646 &cookie->time_entered,
1647 sctp_align_unsafe_makecopy,
1648 SCTP_RTT_FROM_NON_DATA);
1650 if (stcb->asoc.sctp_autoclose_ticks &&
1651 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1652 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1658 * we're in the OPEN state (or beyond), so peer must
1659 * have simply lost the COOKIE-ACK
1663 sctp_stop_all_cookie_timers(stcb);
1665 * We ignore the return code here.. not sure if we should
1666 * somehow abort.. but we do have an existing asoc. This
1667 * really should not fail.
1669 if (sctp_load_addresses_from_init(stcb, m,
1670 init_offset + sizeof(struct sctp_init_chunk),
1671 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1672 if (how_indx < sizeof(asoc->cookie_how))
1673 asoc->cookie_how[how_indx] = 4;
1676 /* respond with a COOKIE-ACK */
1677 sctp_toss_old_cookies(stcb, asoc);
1678 sctp_send_cookie_ack(stcb);
1679 if (how_indx < sizeof(asoc->cookie_how))
1680 asoc->cookie_how[how_indx] = 5;
1683 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1684 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1685 cookie->tie_tag_my_vtag == 0 &&
1686 cookie->tie_tag_peer_vtag == 0) {
1688 * case C in Section 5.2.4 Table 2: XMOO silently discard
1690 if (how_indx < sizeof(asoc->cookie_how))
1691 asoc->cookie_how[how_indx] = 6;
1695 * If nat support, and the below and stcb is established, send back
1696 * a ABORT(colliding state) if we are established.
1698 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) &&
1699 (asoc->peer_supports_nat) &&
1700 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1701 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1702 (asoc->peer_vtag == 0)))) {
1704 * Special case - Peer's support nat. We may have two init's
1705 * that we gave out the same tag on since one was not
1706 * established.. i.e. we get INIT from host-1 behind the nat
1707 * and we respond tag-a, we get a INIT from host-2 behind
1708 * the nat and we get tag-a again. Then we bring up host-1
1709 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1710 * Now we have colliding state. We must send an abort here
1711 * with colliding state indication.
1713 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1714 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1715 mflowtype, mflowid, inp->fibnum,
1719 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1720 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1721 (asoc->peer_vtag == 0))) {
1723 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1724 * should be ok, re-accept peer info
1726 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1728 * Extension of case C. If we hit this, then the
1729 * random number generator returned the same vtag
1730 * when we first sent our INIT-ACK and when we later
1731 * sent our INIT. The side with the seq numbers that
1732 * are different will be the one that normnally
1733 * would have hit case C. This in effect "extends"
1734 * our vtags in this collision case to be 64 bits.
1735 * The same collision could occur aka you get both
1736 * vtag and seq number the same twice in a row.. but
1737 * is much less likely. If it did happen then we
1738 * would proceed through and bring up the assoc.. we
1739 * may end up with the wrong stream setup however..
1740 * which would be bad.. but there is no way to
1741 * tell.. until we send on a stream that does not
1744 if (how_indx < sizeof(asoc->cookie_how))
1745 asoc->cookie_how[how_indx] = 7;
1749 if (how_indx < sizeof(asoc->cookie_how))
1750 asoc->cookie_how[how_indx] = 8;
1751 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1752 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1753 sctp_stop_all_cookie_timers(stcb);
1755 * since we did not send a HB make sure we don't double
1758 net->hb_responded = 1;
1759 if (stcb->asoc.sctp_autoclose_ticks &&
1760 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1761 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1764 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1765 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1767 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1769 * Ok the peer probably discarded our data (if we
1770 * echoed a cookie+data). So anything on the
1771 * sent_queue should be marked for retransmit, we
1772 * may not get something to kick us so it COULD
1773 * still take a timeout to move these.. but it can't
1774 * hurt to mark them.
1776 struct sctp_tmit_chunk *chk;
1778 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1779 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1780 chk->sent = SCTP_DATAGRAM_RESEND;
1781 sctp_flight_size_decrease(chk);
1782 sctp_total_flight_decrease(stcb, chk);
1783 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1789 /* process the INIT info (peer's info) */
1790 retval = sctp_process_init(init_cp, stcb);
1792 if (how_indx < sizeof(asoc->cookie_how))
1793 asoc->cookie_how[how_indx] = 9;
1796 if (sctp_load_addresses_from_init(stcb, m,
1797 init_offset + sizeof(struct sctp_init_chunk),
1798 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1799 if (how_indx < sizeof(asoc->cookie_how))
1800 asoc->cookie_how[how_indx] = 10;
1803 if ((asoc->state & SCTP_STATE_COOKIE_WAIT) ||
1804 (asoc->state & SCTP_STATE_COOKIE_ECHOED)) {
1805 *notification = SCTP_NOTIFY_ASSOC_UP;
1807 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1808 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1809 (inp->sctp_socket->so_qlimit == 0)) {
1810 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1813 stcb->sctp_ep->sctp_flags |=
1814 SCTP_PCB_FLAGS_CONNECTED;
1815 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1816 so = SCTP_INP_SO(stcb->sctp_ep);
1817 atomic_add_int(&stcb->asoc.refcnt, 1);
1818 SCTP_TCB_UNLOCK(stcb);
1819 SCTP_SOCKET_LOCK(so, 1);
1820 SCTP_TCB_LOCK(stcb);
1821 atomic_add_int(&stcb->asoc.refcnt, -1);
1822 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1823 SCTP_SOCKET_UNLOCK(so, 1);
1827 soisconnected(stcb->sctp_socket);
1828 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1829 SCTP_SOCKET_UNLOCK(so, 1);
1832 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1833 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1835 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1836 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1837 } else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1838 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1840 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1842 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1843 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1844 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1845 stcb->sctp_ep, stcb, asoc->primary_destination);
1847 sctp_stop_all_cookie_timers(stcb);
1848 sctp_toss_old_cookies(stcb, asoc);
1849 sctp_send_cookie_ack(stcb);
1852 * only if we have retrans set do we do this. What
1853 * this call does is get only the COOKIE-ACK out and
1854 * then when we return the normal call to
1855 * sctp_chunk_output will get the retrans out behind
1858 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1860 if (how_indx < sizeof(asoc->cookie_how))
1861 asoc->cookie_how[how_indx] = 11;
1865 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1866 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1867 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1868 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1869 cookie->tie_tag_peer_vtag != 0) {
1870 struct sctpasochead *head;
1871 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1875 if (asoc->peer_supports_nat) {
1877 * This is a gross gross hack. Just call the
1878 * cookie_new code since we are allowing a duplicate
1879 * association. I hope this works...
1881 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1882 sh, cookie, cookie_len,
1883 inp, netp, init_src, notification,
1884 auth_skipped, auth_offset, auth_len,
1889 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1892 if (how_indx < sizeof(asoc->cookie_how))
1893 asoc->cookie_how[how_indx] = 12;
1894 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
1895 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1896 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1897 SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
1899 /* notify upper layer */
1900 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1901 atomic_add_int(&stcb->asoc.refcnt, 1);
1902 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) &&
1903 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1904 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
1905 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1907 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1908 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1909 } else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1910 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1912 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1913 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1914 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1915 stcb->sctp_ep, stcb, asoc->primary_destination);
1917 } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) {
1918 /* move to OPEN state, if not in SHUTDOWN_SENT */
1919 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1921 asoc->pre_open_streams =
1922 ntohs(initack_cp->init.num_outbound_streams);
1923 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1924 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1925 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1927 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1929 asoc->str_reset_seq_in = asoc->init_seq_number;
1931 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1932 if (asoc->mapping_array) {
1933 memset(asoc->mapping_array, 0,
1934 asoc->mapping_array_size);
1936 if (asoc->nr_mapping_array) {
1937 memset(asoc->nr_mapping_array, 0,
1938 asoc->mapping_array_size);
1940 SCTP_TCB_UNLOCK(stcb);
1941 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1942 so = SCTP_INP_SO(stcb->sctp_ep);
1943 SCTP_SOCKET_LOCK(so, 1);
1945 SCTP_INP_INFO_WLOCK();
1946 SCTP_INP_WLOCK(stcb->sctp_ep);
1947 SCTP_TCB_LOCK(stcb);
1948 atomic_add_int(&stcb->asoc.refcnt, -1);
1949 /* send up all the data */
1950 SCTP_TCB_SEND_LOCK(stcb);
1952 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1953 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1954 stcb->asoc.strmout[i].chunks_on_queues = 0;
1955 #if defined(SCTP_DETAILED_STR_STATS)
1956 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1957 asoc->strmout[i].abandoned_sent[j] = 0;
1958 asoc->strmout[i].abandoned_unsent[j] = 0;
1961 asoc->strmout[i].abandoned_sent[0] = 0;
1962 asoc->strmout[i].abandoned_unsent[0] = 0;
1964 stcb->asoc.strmout[i].sid = i;
1965 stcb->asoc.strmout[i].next_mid_ordered = 0;
1966 stcb->asoc.strmout[i].next_mid_unordered = 0;
1967 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1969 /* process the INIT-ACK info (my info) */
1970 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1971 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1973 /* pull from vtag hash */
1974 LIST_REMOVE(stcb, sctp_asocs);
1975 /* re-insert to new vtag position */
1976 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1977 SCTP_BASE_INFO(hashasocmark))];
1979 * put it in the bucket in the vtag hash of assoc's for the
1982 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1984 SCTP_TCB_SEND_UNLOCK(stcb);
1985 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1986 SCTP_INP_INFO_WUNLOCK();
1987 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1988 SCTP_SOCKET_UNLOCK(so, 1);
1990 asoc->total_flight = 0;
1991 asoc->total_flight_count = 0;
1992 /* process the INIT info (peer's info) */
1993 retval = sctp_process_init(init_cp, stcb);
1995 if (how_indx < sizeof(asoc->cookie_how))
1996 asoc->cookie_how[how_indx] = 13;
2001 * since we did not send a HB make sure we don't double
2004 net->hb_responded = 1;
2006 if (sctp_load_addresses_from_init(stcb, m,
2007 init_offset + sizeof(struct sctp_init_chunk),
2008 initack_offset, src, dst, init_src, stcb->asoc.port)) {
2009 if (how_indx < sizeof(asoc->cookie_how))
2010 asoc->cookie_how[how_indx] = 14;
2014 /* respond with a COOKIE-ACK */
2015 sctp_stop_all_cookie_timers(stcb);
2016 sctp_toss_old_cookies(stcb, asoc);
2017 sctp_send_cookie_ack(stcb);
2018 if (how_indx < sizeof(asoc->cookie_how))
2019 asoc->cookie_how[how_indx] = 15;
2023 if (how_indx < sizeof(asoc->cookie_how))
2024 asoc->cookie_how[how_indx] = 16;
2025 /* all other cases... */
2031 * handle a state cookie for a new association m: input packet mbuf chain--
2032 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2033 * and the cookie signature does not exist offset: offset into mbuf to the
2034 * cookie-echo chunk length: length of the cookie chunk to: where the init
2035 * was from returns a new TCB
2037 static struct sctp_tcb *
2038 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2039 struct sockaddr *src, struct sockaddr *dst,
2040 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2041 struct sctp_inpcb *inp, struct sctp_nets **netp,
2042 struct sockaddr *init_src, int *notification,
2043 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2044 uint8_t mflowtype, uint32_t mflowid,
2045 uint32_t vrf_id, uint16_t port)
2047 struct sctp_tcb *stcb;
2048 struct sctp_init_chunk *init_cp, init_buf;
2049 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2050 union sctp_sockstore store;
2051 struct sctp_association *asoc;
2052 int init_offset, initack_offset, initack_limit;
2055 uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
2056 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2059 so = SCTP_INP_SO(inp);
2063 * find and validate the INIT chunk in the cookie (peer's info) the
2064 * INIT should start after the cookie-echo header struct (chunk
2065 * header, state cookie header struct)
2067 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2068 init_cp = (struct sctp_init_chunk *)
2069 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2070 (uint8_t *)&init_buf);
2071 if (init_cp == NULL) {
2072 /* could not pull a INIT chunk in cookie */
2073 SCTPDBG(SCTP_DEBUG_INPUT1,
2074 "process_cookie_new: could not pull INIT chunk hdr\n");
2077 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2078 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2081 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2083 * find and validate the INIT-ACK chunk in the cookie (my info) the
2084 * INIT-ACK follows the INIT chunk
2086 initack_cp = (struct sctp_init_ack_chunk *)
2087 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2088 (uint8_t *)&initack_buf);
2089 if (initack_cp == NULL) {
2090 /* could not pull INIT-ACK chunk in cookie */
2091 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2094 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2098 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2099 * "initack_limit" value. This is because the chk_length field
2100 * includes the length of the cookie, but the cookie is omitted when
2101 * the INIT and INIT_ACK are tacked onto the cookie...
2103 initack_limit = offset + cookie_len;
2106 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2111 * Here we do a trick, we set in NULL for the proc/thread argument.
2112 * We do this since in effect we only use the p argument when the
2113 * socket is unbound and we must do an implicit bind. Since we are
2114 * getting a cookie, we cannot be unbound.
2116 stcb = sctp_aloc_assoc(inp, init_src, &error,
2117 ntohl(initack_cp->init.initiate_tag), vrf_id,
2118 ntohs(initack_cp->init.num_outbound_streams),
2120 (struct thread *)NULL
2123 struct mbuf *op_err;
2125 /* memory problem? */
2126 SCTPDBG(SCTP_DEBUG_INPUT1,
2127 "process_cookie_new: no room for another TCB!\n");
2128 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2129 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2130 src, dst, sh, op_err,
2135 /* get the correct sctp_nets */
2137 *netp = sctp_findnet(stcb, init_src);
2140 /* get scope variables out of cookie */
2141 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2142 asoc->scope.site_scope = cookie->site_scope;
2143 asoc->scope.local_scope = cookie->local_scope;
2144 asoc->scope.loopback_scope = cookie->loopback_scope;
2146 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2147 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2148 struct mbuf *op_err;
2151 * Houston we have a problem. The EP changed while the
2152 * cookie was in flight. Only recourse is to abort the
2155 atomic_add_int(&stcb->asoc.refcnt, 1);
2156 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2157 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2158 src, dst, sh, op_err,
2161 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2162 SCTP_TCB_UNLOCK(stcb);
2163 SCTP_SOCKET_LOCK(so, 1);
2164 SCTP_TCB_LOCK(stcb);
2166 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2167 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2168 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2169 SCTP_SOCKET_UNLOCK(so, 1);
2171 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2174 /* process the INIT-ACK info (my info) */
2175 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2176 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2177 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2178 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2179 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2180 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2181 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2182 asoc->str_reset_seq_in = asoc->init_seq_number;
2184 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2186 /* process the INIT info (peer's info) */
2188 retval = sctp_process_init(init_cp, stcb);
2192 atomic_add_int(&stcb->asoc.refcnt, 1);
2193 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2194 SCTP_TCB_UNLOCK(stcb);
2195 SCTP_SOCKET_LOCK(so, 1);
2196 SCTP_TCB_LOCK(stcb);
2198 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2199 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2200 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2201 SCTP_SOCKET_UNLOCK(so, 1);
2203 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2206 /* load all addresses */
2207 if (sctp_load_addresses_from_init(stcb, m,
2208 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2209 src, dst, init_src, port)) {
2210 atomic_add_int(&stcb->asoc.refcnt, 1);
2211 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2212 SCTP_TCB_UNLOCK(stcb);
2213 SCTP_SOCKET_LOCK(so, 1);
2214 SCTP_TCB_LOCK(stcb);
2216 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2217 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2218 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2219 SCTP_SOCKET_UNLOCK(so, 1);
2221 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2225 * verify any preceding AUTH chunk that was skipped
2227 /* pull the local authentication parameters from the cookie/init-ack */
2228 sctp_auth_get_cookie_params(stcb, m,
2229 initack_offset + sizeof(struct sctp_init_ack_chunk),
2230 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2232 struct sctp_auth_chunk *auth;
2234 auth = (struct sctp_auth_chunk *)
2235 sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2236 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2237 /* auth HMAC failed, dump the assoc and packet */
2238 SCTPDBG(SCTP_DEBUG_AUTH1,
2239 "COOKIE-ECHO: AUTH failed\n");
2240 atomic_add_int(&stcb->asoc.refcnt, 1);
2241 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2242 SCTP_TCB_UNLOCK(stcb);
2243 SCTP_SOCKET_LOCK(so, 1);
2244 SCTP_TCB_LOCK(stcb);
2246 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2247 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2248 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2249 SCTP_SOCKET_UNLOCK(so, 1);
2251 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2254 /* remaining chunks checked... good to go */
2255 stcb->asoc.authenticated = 1;
2258 /* update current state */
2259 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2260 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2261 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2262 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2263 stcb->sctp_ep, stcb, asoc->primary_destination);
2265 sctp_stop_all_cookie_timers(stcb);
2266 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2267 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2270 * if we're doing ASCONFs, check to see if we have any new local
2271 * addresses that need to get added to the peer (eg. addresses
2272 * changed while cookie echo in flight). This needs to be done
2273 * after we go to the OPEN state to do the correct asconf
2274 * processing. else, make sure we have the correct addresses in our
2278 /* warning, we re-use sin, sin6, sa_store here! */
2279 /* pull in local_address (our "from" address) */
2280 switch (cookie->laddr_type) {
2282 case SCTP_IPV4_ADDRESS:
2283 /* source addr is IPv4 */
2284 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2285 store.sin.sin_family = AF_INET;
2286 store.sin.sin_len = sizeof(struct sockaddr_in);
2287 store.sin.sin_addr.s_addr = cookie->laddress[0];
2291 case SCTP_IPV6_ADDRESS:
2292 /* source addr is IPv6 */
2293 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2294 store.sin6.sin6_family = AF_INET6;
2295 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2296 store.sin6.sin6_scope_id = cookie->scope_id;
2297 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2301 atomic_add_int(&stcb->asoc.refcnt, 1);
2302 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2303 SCTP_TCB_UNLOCK(stcb);
2304 SCTP_SOCKET_LOCK(so, 1);
2305 SCTP_TCB_LOCK(stcb);
2307 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2308 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2309 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2310 SCTP_SOCKET_UNLOCK(so, 1);
2312 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2316 /* set up to notify upper layer */
2317 *notification = SCTP_NOTIFY_ASSOC_UP;
2318 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2319 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2320 (inp->sctp_socket->so_qlimit == 0)) {
2322 * This is an endpoint that called connect() how it got a
2323 * cookie that is NEW is a bit of a mystery. It must be that
2324 * the INIT was sent, but before it got there.. a complete
2325 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2326 * should have went to the other code.. not here.. oh well..
2327 * a bit of protection is worth having..
2329 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2330 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2331 atomic_add_int(&stcb->asoc.refcnt, 1);
2332 SCTP_TCB_UNLOCK(stcb);
2333 SCTP_SOCKET_LOCK(so, 1);
2334 SCTP_TCB_LOCK(stcb);
2335 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2336 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2337 SCTP_SOCKET_UNLOCK(so, 1);
2341 soisconnected(stcb->sctp_socket);
2342 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2343 SCTP_SOCKET_UNLOCK(so, 1);
2345 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2346 (inp->sctp_socket->so_qlimit)) {
2348 * We don't want to do anything with this one. Since it is
2349 * the listening guy. The timer will get started for
2350 * accepted connections in the caller.
2354 /* since we did not send a HB make sure we don't double things */
2355 if ((netp) && (*netp))
2356 (*netp)->hb_responded = 1;
2358 if (stcb->asoc.sctp_autoclose_ticks &&
2359 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2360 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2362 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2363 if ((netp != NULL) && (*netp != NULL)) {
2364 /* calculate the RTT and set the encaps port */
2365 (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
2366 &cookie->time_entered, sctp_align_unsafe_makecopy,
2367 SCTP_RTT_FROM_NON_DATA);
2369 /* respond with a COOKIE-ACK */
2370 sctp_send_cookie_ack(stcb);
2373 * check the address lists for any ASCONFs that need to be sent
2374 * AFTER the cookie-ack is sent
2376 sctp_check_address_list(stcb, m,
2377 initack_offset + sizeof(struct sctp_init_ack_chunk),
2378 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2379 &store.sa, cookie->local_scope, cookie->site_scope,
2380 cookie->ipv4_scope, cookie->loopback_scope);
2387 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2388 * we NEED to make sure we are not already using the vtag. If so we
2389 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2390 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2391 SCTP_BASE_INFO(hashasocmark))];
2392 LIST_FOREACH(stcb, head, sctp_asocs) {
2393 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2394 -- SEND ABORT - TRY AGAIN --
2400 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2401 * existing (non-NULL) TCB
2403 static struct mbuf *
2404 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2405 struct sockaddr *src, struct sockaddr *dst,
2406 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2407 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2408 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2409 struct sctp_tcb **locked_tcb,
2410 uint8_t mflowtype, uint32_t mflowid,
2411 uint32_t vrf_id, uint16_t port)
2413 struct sctp_state_cookie *cookie;
2414 struct sctp_tcb *l_stcb = *stcb;
2415 struct sctp_inpcb *l_inp;
2416 struct sockaddr *to;
2417 struct sctp_pcb *ep;
2419 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2421 uint8_t cookie_ok = 0;
2422 unsigned int sig_offset, cookie_offset;
2423 unsigned int cookie_len;
2425 struct timeval time_expires;
2426 int notification = 0;
2427 struct sctp_nets *netl;
2428 int had_a_existing_tcb = 0;
2429 int send_int_conf = 0;
2431 struct sockaddr_in sin;
2434 struct sockaddr_in6 sin6;
2437 SCTPDBG(SCTP_DEBUG_INPUT2,
2438 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2440 if (inp_p == NULL) {
2443 cookie = &cp->cookie;
2444 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2445 cookie_len = ntohs(cp->ch.chunk_length);
2447 if ((cookie->peerport != sh->src_port) ||
2448 (cookie->myport != sh->dest_port) ||
2449 (cookie->my_vtag != sh->v_tag)) {
2451 * invalid ports or bad tag. Note that we always leave the
2452 * v_tag in the header in network order and when we stored
2453 * it in the my_vtag slot we also left it in network order.
2454 * This maintains the match even though it may be in the
2455 * opposite byte order of the machine :->
2459 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2460 sizeof(struct sctp_init_chunk) +
2461 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2462 /* cookie too small */
2466 * split off the signature into its own mbuf (since it should not be
2467 * calculated in the sctp_hmac_m() call).
2469 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2470 m_sig = m_split(m, sig_offset, M_NOWAIT);
2471 if (m_sig == NULL) {
2472 /* out of memory or ?? */
2475 #ifdef SCTP_MBUF_LOGGING
2476 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2477 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2482 * compute the signature/digest for the cookie
2484 ep = &(*inp_p)->sctp_ep;
2487 SCTP_TCB_UNLOCK(l_stcb);
2489 SCTP_INP_RLOCK(l_inp);
2491 SCTP_TCB_LOCK(l_stcb);
2493 /* which cookie is it? */
2494 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2495 (ep->current_secret_number != ep->last_secret_number)) {
2496 /* it's the old cookie */
2497 (void)sctp_hmac_m(SCTP_HMAC,
2498 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2499 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2501 /* it's the current cookie */
2502 (void)sctp_hmac_m(SCTP_HMAC,
2503 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2504 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2506 /* get the signature */
2507 SCTP_INP_RUNLOCK(l_inp);
2508 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2510 /* couldn't find signature */
2511 sctp_m_freem(m_sig);
2514 /* compare the received digest with the computed digest */
2515 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2516 /* try the old cookie? */
2517 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2518 (ep->current_secret_number != ep->last_secret_number)) {
2519 /* compute digest with old */
2520 (void)sctp_hmac_m(SCTP_HMAC,
2521 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2522 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2524 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2532 * Now before we continue we must reconstruct our mbuf so that
2533 * normal processing of any other chunks will work.
2539 while (SCTP_BUF_NEXT(m_at) != NULL) {
2540 m_at = SCTP_BUF_NEXT(m_at);
2542 SCTP_BUF_NEXT(m_at) = m_sig;
2545 if (cookie_ok == 0) {
2546 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2547 SCTPDBG(SCTP_DEBUG_INPUT2,
2548 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2549 (uint32_t)offset, cookie_offset, sig_offset);
2553 * check the cookie timestamps to be sure it's not stale
2555 (void)SCTP_GETTIME_TIMEVAL(&now);
2556 /* Expire time is in Ticks, so we convert to seconds */
2557 time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
2558 time_expires.tv_usec = cookie->time_entered.tv_usec;
2560 * TODO sctp_constants.h needs alternative time macros when _KERNEL
2563 if (timevalcmp(&now, &time_expires, >)) {
2564 /* cookie is stale! */
2565 struct mbuf *op_err;
2566 struct sctp_error_stale_cookie *cause;
2569 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2570 0, M_NOWAIT, 1, MT_DATA);
2571 if (op_err == NULL) {
2576 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2577 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2578 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2579 cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
2580 (sizeof(uint32_t))));
2581 /* seconds to usec */
2582 tim = (now.tv_sec - time_expires.tv_sec) * 1000000;
2585 tim = now.tv_usec - cookie->time_entered.tv_usec;
2586 cause->stale_time = htonl(tim);
2587 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2588 mflowtype, mflowid, l_inp->fibnum,
2593 * Now we must see with the lookup address if we have an existing
2594 * asoc. This will only happen if we were in the COOKIE-WAIT state
2595 * and a INIT collided with us and somewhere the peer sent the
2596 * cookie on another address besides the single address our assoc
2597 * had for him. In this case we will have one of the tie-tags set at
2598 * least AND the address field in the cookie can be used to look it
2602 switch (cookie->addr_type) {
2604 case SCTP_IPV6_ADDRESS:
2605 memset(&sin6, 0, sizeof(sin6));
2606 sin6.sin6_family = AF_INET6;
2607 sin6.sin6_len = sizeof(sin6);
2608 sin6.sin6_port = sh->src_port;
2609 sin6.sin6_scope_id = cookie->scope_id;
2610 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2611 sizeof(sin6.sin6_addr.s6_addr));
2612 to = (struct sockaddr *)&sin6;
2616 case SCTP_IPV4_ADDRESS:
2617 memset(&sin, 0, sizeof(sin));
2618 sin.sin_family = AF_INET;
2619 sin.sin_len = sizeof(sin);
2620 sin.sin_port = sh->src_port;
2621 sin.sin_addr.s_addr = cookie->address[0];
2622 to = (struct sockaddr *)&sin;
2626 /* This should not happen */
2629 if (*stcb == NULL) {
2630 /* Yep, lets check */
2631 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2632 if (*stcb == NULL) {
2634 * We should have only got back the same inp. If we
2635 * got back a different ep we have a problem. The
2636 * original findep got back l_inp and now
2638 if (l_inp != *inp_p) {
2639 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2642 if (*locked_tcb == NULL) {
2644 * In this case we found the assoc only
2645 * after we locked the create lock. This
2646 * means we are in a colliding case and we
2647 * must make sure that we unlock the tcb if
2648 * its one of the cases where we throw away
2649 * the incoming packets.
2651 *locked_tcb = *stcb;
2654 * We must also increment the inp ref count
2655 * since the ref_count flags was set when we
2656 * did not find the TCB, now we found it
2657 * which reduces the refcount.. we must
2658 * raise it back out to balance it all :-)
2660 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2661 if ((*stcb)->sctp_ep != l_inp) {
2662 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2663 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2668 cookie_len -= SCTP_SIGNATURE_SIZE;
2669 if (*stcb == NULL) {
2670 /* this is the "normal" case... get a new TCB */
2671 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2672 cookie, cookie_len, *inp_p,
2673 netp, to, ¬ification,
2674 auth_skipped, auth_offset, auth_len,
2678 /* this is abnormal... cookie-echo on existing TCB */
2679 had_a_existing_tcb = 1;
2680 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2682 cookie, cookie_len, *inp_p, *stcb, netp, to,
2683 ¬ification, auth_skipped, auth_offset, auth_len,
2688 if (*stcb == NULL) {
2689 /* still no TCB... must be bad cookie-echo */
2692 if (*netp != NULL) {
2693 (*netp)->flowtype = mflowtype;
2694 (*netp)->flowid = mflowid;
2697 * Ok, we built an association so confirm the address we sent the
2700 netl = sctp_findnet(*stcb, to);
2702 * This code should in theory NOT run but
2705 /* TSNH! Huh, why do I need to add this address here? */
2706 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2707 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2710 netl = sctp_findnet(*stcb, to);
2713 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2714 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2715 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2720 sctp_start_net_timers(*stcb);
2721 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2722 if (!had_a_existing_tcb ||
2723 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2725 * If we have a NEW cookie or the connect never
2726 * reached the connected state during collision we
2727 * must do the TCP accept thing.
2729 struct socket *so, *oso;
2730 struct sctp_inpcb *inp;
2732 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2734 * For a restart we will keep the same
2735 * socket, no need to do anything. I THINK!!
2737 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2738 if (send_int_conf) {
2739 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2740 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2744 oso = (*inp_p)->sctp_socket;
2745 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2746 SCTP_TCB_UNLOCK((*stcb));
2747 CURVNET_SET(oso->so_vnet);
2748 so = sonewconn(oso, 0
2751 SCTP_TCB_LOCK((*stcb));
2752 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2755 struct mbuf *op_err;
2756 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2757 struct socket *pcb_so;
2759 /* Too many sockets */
2760 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2761 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2762 sctp_abort_association(*inp_p, NULL, m, iphlen,
2763 src, dst, sh, op_err,
2766 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2767 pcb_so = SCTP_INP_SO(*inp_p);
2768 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2769 SCTP_TCB_UNLOCK((*stcb));
2770 SCTP_SOCKET_LOCK(pcb_so, 1);
2771 SCTP_TCB_LOCK((*stcb));
2772 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2774 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2775 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2776 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2777 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2781 inp = (struct sctp_inpcb *)so->so_pcb;
2782 SCTP_INP_INCR_REF(inp);
2784 * We add the unbound flag here so that if we get an
2785 * soabort() before we get the move_pcb done, we
2786 * will properly cleanup.
2788 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2789 SCTP_PCB_FLAGS_CONNECTED |
2790 SCTP_PCB_FLAGS_IN_TCPPOOL |
2791 SCTP_PCB_FLAGS_UNBOUND |
2792 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2793 SCTP_PCB_FLAGS_DONT_WAKE);
2794 inp->sctp_features = (*inp_p)->sctp_features;
2795 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2796 inp->sctp_socket = so;
2797 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2798 inp->max_cwnd = (*inp_p)->max_cwnd;
2799 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2800 inp->ecn_supported = (*inp_p)->ecn_supported;
2801 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2802 inp->auth_supported = (*inp_p)->auth_supported;
2803 inp->asconf_supported = (*inp_p)->asconf_supported;
2804 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2805 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2806 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2807 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2808 inp->sctp_context = (*inp_p)->sctp_context;
2809 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2810 inp->fibnum = (*inp_p)->fibnum;
2811 inp->inp_starting_point_for_iterator = NULL;
2813 * copy in the authentication parameters from the
2816 if (inp->sctp_ep.local_hmacs)
2817 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2818 inp->sctp_ep.local_hmacs =
2819 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2820 if (inp->sctp_ep.local_auth_chunks)
2821 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2822 inp->sctp_ep.local_auth_chunks =
2823 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2826 * Now we must move it from one hash table to
2827 * another and get the tcb in the right place.
2831 * This is where the one-2-one socket is put into
2832 * the accept state waiting for the accept!
2835 (*stcb)->asoc.state |= SCTP_STATE_IN_ACCEPT_QUEUE;
2837 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2839 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2840 SCTP_TCB_UNLOCK((*stcb));
2842 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2844 SCTP_TCB_LOCK((*stcb));
2845 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2849 * now we must check to see if we were aborted while
2850 * the move was going on and the lock/unlock
2853 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2855 * yep it was, we leave the assoc attached
2856 * to the socket since the sctp_inpcb_free()
2857 * call will send an abort for us.
2859 SCTP_INP_DECR_REF(inp);
2862 SCTP_INP_DECR_REF(inp);
2863 /* Switch over to the new guy */
2865 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2866 if (send_int_conf) {
2867 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2868 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2871 * Pull it from the incomplete queue and wake the
2874 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2875 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2876 SCTP_TCB_UNLOCK((*stcb));
2877 SCTP_SOCKET_LOCK(so, 1);
2880 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2881 SCTP_TCB_LOCK((*stcb));
2882 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2883 SCTP_SOCKET_UNLOCK(so, 1);
2889 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2891 if (send_int_conf) {
2892 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2893 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2899 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2900 struct sctp_tcb *stcb, struct sctp_nets *net)
2902 /* cp must not be used, others call this without a c-ack :-) */
2903 struct sctp_association *asoc;
2905 SCTPDBG(SCTP_DEBUG_INPUT2,
2906 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2907 if ((stcb == NULL) || (net == NULL)) {
2912 sctp_stop_all_cookie_timers(stcb);
2913 /* process according to association state */
2914 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
2915 /* state change only needed when I am in right state */
2916 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2917 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2918 sctp_start_net_timers(stcb);
2919 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2920 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2921 stcb->sctp_ep, stcb, asoc->primary_destination);
2925 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2926 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2927 if (asoc->overall_error_count == 0) {
2928 net->RTO = sctp_calculate_rto(stcb, asoc, net,
2929 &asoc->time_entered, sctp_align_safe_nocopy,
2930 SCTP_RTT_FROM_NON_DATA);
2932 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2933 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2934 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2935 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2936 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2940 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2941 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2942 so = SCTP_INP_SO(stcb->sctp_ep);
2943 atomic_add_int(&stcb->asoc.refcnt, 1);
2944 SCTP_TCB_UNLOCK(stcb);
2945 SCTP_SOCKET_LOCK(so, 1);
2946 SCTP_TCB_LOCK(stcb);
2947 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2949 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2950 soisconnected(stcb->sctp_socket);
2952 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2953 SCTP_SOCKET_UNLOCK(so, 1);
2957 * since we did not send a HB make sure we don't double
2960 net->hb_responded = 1;
2962 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2964 * We don't need to do the asconf thing, nor hb or
2965 * autoclose if the socket is closed.
2969 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2973 if (stcb->asoc.sctp_autoclose_ticks &&
2974 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2975 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2976 stcb->sctp_ep, stcb, NULL);
2979 * send ASCONF if parameters are pending and ASCONFs are
2980 * allowed (eg. addresses changed when init/cookie echo were
2983 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2984 (stcb->asoc.asconf_supported == 1) &&
2985 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2986 #ifdef SCTP_TIMER_BASED_ASCONF
2987 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2988 stcb->sctp_ep, stcb,
2989 stcb->asoc.primary_destination);
2991 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2992 SCTP_ADDR_NOT_LOCKED);
2997 /* Toss the cookie if I can */
2998 sctp_toss_old_cookies(stcb, asoc);
2999 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3000 /* Restart the timer if we have pending data */
3001 struct sctp_tmit_chunk *chk;
3003 chk = TAILQ_FIRST(&asoc->sent_queue);
3004 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
3009 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
3010 struct sctp_tcb *stcb)
3012 struct sctp_nets *net;
3013 struct sctp_tmit_chunk *lchk;
3014 struct sctp_ecne_chunk bkup;
3015 uint8_t override_bit;
3016 uint32_t tsn, window_data_tsn;
3018 unsigned int pkt_cnt;
3020 len = ntohs(cp->ch.chunk_length);
3021 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3022 (len != sizeof(struct old_sctp_ecne_chunk))) {
3025 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3026 /* Its the old format */
3027 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3028 bkup.num_pkts_since_cwr = htonl(1);
3031 SCTP_STAT_INCR(sctps_recvecne);
3032 tsn = ntohl(cp->tsn);
3033 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3034 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3036 window_data_tsn = stcb->asoc.sending_seq - 1;
3038 window_data_tsn = lchk->rec.data.tsn;
3041 /* Find where it was sent to if possible. */
3043 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3044 if (lchk->rec.data.tsn == tsn) {
3046 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3049 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
3055 * What to do. A previous send of a CWR was possibly lost.
3056 * See how old it is, we may have it marked on the actual
3059 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3060 if (tsn == net->last_cwr_tsn) {
3061 /* Found him, send it off */
3067 * If we reach here, we need to send a special CWR
3068 * that says hey, we did this a long time ago and
3069 * you lost the response.
3071 net = TAILQ_FIRST(&stcb->asoc.nets);
3076 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3083 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3084 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3086 * JRS - Use the congestion control given in the pluggable
3089 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3091 * We reduce once every RTT. So we will only lower cwnd at
3092 * the next sending seq i.e. the window_data_tsn
3094 net->cwr_window_tsn = window_data_tsn;
3095 net->ecn_ce_pkt_cnt += pkt_cnt;
3096 net->lost_cnt = pkt_cnt;
3097 net->last_cwr_tsn = tsn;
3099 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3100 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3101 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3103 * Another loss in the same window update how many
3104 * marks/packets lost we have had.
3108 if (pkt_cnt > net->lost_cnt) {
3109 /* Should be the case */
3110 cnt = (pkt_cnt - net->lost_cnt);
3111 net->ecn_ce_pkt_cnt += cnt;
3113 net->lost_cnt = pkt_cnt;
3114 net->last_cwr_tsn = tsn;
3116 * Most CC functions will ignore this call, since we
3117 * are in-window yet of the initial CE the peer saw.
3119 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3123 * We always send a CWR this way if our previous one was lost our
3124 * peer will get an update, or if it is not time again to reduce we
3125 * still get the cwr to the peer. Note we set the override when we
3126 * could not find the TSN on the chunk or the destination network.
3128 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3132 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3135 * Here we get a CWR from the peer. We must look in the outqueue and
3136 * make sure that we have a covered ECNE in the control chunk part.
3139 struct sctp_tmit_chunk *chk;
3140 struct sctp_ecne_chunk *ecne;
3144 cwr_tsn = ntohl(cp->tsn);
3145 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3146 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
3147 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3150 if ((override == 0) && (chk->whoTo != net)) {
3151 /* Must be from the right src unless override is set */
3154 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3155 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3156 /* this covers this ECNE, we can remove it */
3157 stcb->asoc.ecn_echo_cnt_onq--;
3158 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3160 sctp_m_freem(chk->data);
3162 stcb->asoc.ctrl_queue_cnt--;
3163 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3164 if (override == 0) {
3172 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3173 struct sctp_tcb *stcb, struct sctp_nets *net)
3175 struct sctp_association *asoc;
3176 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3180 SCTPDBG(SCTP_DEBUG_INPUT2,
3181 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3186 /* process according to association state */
3187 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3188 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3189 SCTPDBG(SCTP_DEBUG_INPUT2,
3190 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3191 SCTP_TCB_UNLOCK(stcb);
3194 /* notify upper layer protocol */
3195 if (stcb->sctp_socket) {
3196 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3199 if (!TAILQ_EMPTY(&asoc->send_queue) ||
3200 !TAILQ_EMPTY(&asoc->sent_queue) ||
3201 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3202 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3205 /* stop the timer */
3206 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3207 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3208 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3210 SCTPDBG(SCTP_DEBUG_INPUT2,
3211 "sctp_handle_shutdown_complete: calls free-asoc\n");
3212 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3213 so = SCTP_INP_SO(stcb->sctp_ep);
3214 atomic_add_int(&stcb->asoc.refcnt, 1);
3215 SCTP_TCB_UNLOCK(stcb);
3216 SCTP_SOCKET_LOCK(so, 1);
3217 SCTP_TCB_LOCK(stcb);
3218 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3220 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3221 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3222 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3223 SCTP_SOCKET_UNLOCK(so, 1);
3229 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3230 struct sctp_nets *net, uint8_t flg)
3232 switch (desc->chunk_type) {
3234 /* find the tsn to resend (possibly */
3237 struct sctp_tmit_chunk *tp1;
3239 tsn = ntohl(desc->tsn_ifany);
3240 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3241 if (tp1->rec.data.tsn == tsn) {
3245 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3253 * Do it the other way , aka without paying
3254 * attention to queue seq order.
3256 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3257 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3258 if (tp1->rec.data.tsn == tsn) {
3265 SCTP_STAT_INCR(sctps_pdrptsnnf);
3267 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3270 if (((flg & SCTP_BADCRC) == 0) &&
3271 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3274 if ((stcb->asoc.peers_rwnd == 0) &&
3275 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3276 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3279 if (stcb->asoc.peers_rwnd == 0 &&
3280 (flg & SCTP_FROM_MIDDLE_BOX)) {
3281 SCTP_STAT_INCR(sctps_pdrpdizrw);
3284 ddp = (uint8_t *)(mtod(tp1->data, caddr_t)+
3285 sizeof(struct sctp_data_chunk));
3289 for (iii = 0; iii < sizeof(desc->data_bytes);
3291 if (ddp[iii] != desc->data_bytes[iii]) {
3292 SCTP_STAT_INCR(sctps_pdrpbadd);
3300 * this guy had a RTO calculation
3301 * pending on it, cancel it
3303 if (tp1->whoTo->rto_needed == 0) {
3304 tp1->whoTo->rto_needed = 1;
3308 SCTP_STAT_INCR(sctps_pdrpmark);
3309 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3310 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3312 * mark it as if we were doing a FR, since
3313 * we will be getting gap ack reports behind
3314 * the info from the router.
3316 tp1->rec.data.doing_fast_retransmit = 1;
3318 * mark the tsn with what sequences can
3321 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3322 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3324 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3327 /* restart the timer */
3328 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3330 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3331 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3334 /* fix counts and things */
3335 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3336 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3337 tp1->whoTo->flight_size,
3339 (uint32_t)(uintptr_t)stcb,
3342 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3343 sctp_flight_size_decrease(tp1);
3344 sctp_total_flight_decrease(stcb, tp1);
3346 tp1->sent = SCTP_DATAGRAM_RESEND;
3352 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3353 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3356 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3358 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3361 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3362 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3363 audit, stcb->asoc.sent_queue_retran_cnt);
3364 #ifndef SCTP_AUDITING_ENABLED
3365 stcb->asoc.sent_queue_retran_cnt = audit;
3373 struct sctp_tmit_chunk *asconf;
3375 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3377 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3382 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3383 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3384 asconf->sent = SCTP_DATAGRAM_RESEND;
3385 asconf->snd_count--;
3389 case SCTP_INITIATION:
3390 /* resend the INIT */
3391 stcb->asoc.dropped_special_cnt++;
3392 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3394 * If we can get it in, in a few attempts we do
3395 * this, otherwise we let the timer fire.
3397 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3399 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3400 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3403 case SCTP_SELECTIVE_ACK:
3404 case SCTP_NR_SELECTIVE_ACK:
3405 /* resend the sack */
3406 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3408 case SCTP_HEARTBEAT_REQUEST:
3409 /* resend a demand HB */
3410 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3412 * Only retransmit if we KNOW we wont destroy the
3415 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3419 sctp_send_shutdown(stcb, net);
3421 case SCTP_SHUTDOWN_ACK:
3422 sctp_send_shutdown_ack(stcb, net);
3424 case SCTP_COOKIE_ECHO:
3426 struct sctp_tmit_chunk *cookie;
3429 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3431 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3436 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3437 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3438 cookie->sent = SCTP_DATAGRAM_RESEND;
3439 sctp_stop_all_cookie_timers(stcb);
3443 case SCTP_COOKIE_ACK:
3444 sctp_send_cookie_ack(stcb);
3446 case SCTP_ASCONF_ACK:
3447 /* resend last asconf ack */
3448 sctp_send_asconf_ack(stcb);
3450 case SCTP_IFORWARD_CUM_TSN:
3451 case SCTP_FORWARD_CUM_TSN:
3452 send_forward_tsn(stcb, &stcb->asoc);
3454 /* can't do anything with these */
3455 case SCTP_PACKET_DROPPED:
3456 case SCTP_INITIATION_ACK: /* this should not happen */
3457 case SCTP_HEARTBEAT_ACK:
3458 case SCTP_ABORT_ASSOCIATION:
3459 case SCTP_OPERATION_ERROR:
3460 case SCTP_SHUTDOWN_COMPLETE:
3470 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3476 * We set things to 0xffffffff since this is the last delivered
3477 * sequence and we will be sending in 0 after the reset.
3480 if (number_entries) {
3481 for (i = 0; i < number_entries; i++) {
3482 temp = ntohs(list[i]);
3483 if (temp >= stcb->asoc.streamincnt) {
3486 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3490 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3491 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3494 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3498 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3503 if (number_entries > 0) {
3504 for (i = 0; i < number_entries; i++) {
3505 temp = ntohs(list[i]);
3506 if (temp >= stcb->asoc.streamoutcnt) {
3507 /* no such stream */
3510 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3511 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3514 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3515 stcb->asoc.strmout[i].next_mid_ordered = 0;
3516 stcb->asoc.strmout[i].next_mid_unordered = 0;
3519 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3523 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3528 if (number_entries > 0) {
3529 for (i = 0; i < number_entries; i++) {
3530 temp = ntohs(list[i]);
3531 if (temp >= stcb->asoc.streamoutcnt) {
3532 /* no such stream */
3535 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3538 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3539 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3545 struct sctp_stream_reset_request *
3546 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3548 struct sctp_association *asoc;
3549 struct sctp_chunkhdr *ch;
3550 struct sctp_stream_reset_request *r;
3551 struct sctp_tmit_chunk *chk;
3555 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3556 asoc->stream_reset_outstanding = 0;
3559 if (stcb->asoc.str_reset == NULL) {
3560 asoc->stream_reset_outstanding = 0;
3563 chk = stcb->asoc.str_reset;
3564 if (chk->data == NULL) {
3568 /* he wants a copy of the chk pointer */
3571 clen = chk->send_size;
3572 ch = mtod(chk->data, struct sctp_chunkhdr *);
3573 r = (struct sctp_stream_reset_request *)(ch + 1);
3574 if (ntohl(r->request_seq) == seq) {
3578 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3579 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3580 /* move to the next one, there can only be a max of two */
3581 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3582 if (ntohl(r->request_seq) == seq) {
3586 /* that seq is not here */
3591 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3593 struct sctp_association *asoc;
3594 struct sctp_tmit_chunk *chk = stcb->asoc.str_reset;
3596 if (stcb->asoc.str_reset == NULL) {
3601 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3602 chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3603 TAILQ_REMOVE(&asoc->control_send_queue,
3607 sctp_m_freem(chk->data);
3610 asoc->ctrl_queue_cnt--;
3611 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3612 /* sa_ignore NO_NULL_CHK */
3613 stcb->asoc.str_reset = NULL;
3618 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3619 uint32_t seq, uint32_t action,
3620 struct sctp_stream_reset_response *respin)
3624 struct sctp_association *asoc = &stcb->asoc;
3625 struct sctp_tmit_chunk *chk;
3626 struct sctp_stream_reset_request *req_param;
3627 struct sctp_stream_reset_out_request *req_out_param;
3628 struct sctp_stream_reset_in_request *req_in_param;
3629 uint32_t number_entries;
3631 if (asoc->stream_reset_outstanding == 0) {
3635 if (seq == stcb->asoc.str_reset_seq_out) {
3636 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3637 if (req_param != NULL) {
3638 stcb->asoc.str_reset_seq_out++;
3639 type = ntohs(req_param->ph.param_type);
3640 lparm_len = ntohs(req_param->ph.param_length);
3641 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3644 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3645 number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3646 asoc->stream_reset_out_is_outstanding = 0;
3647 if (asoc->stream_reset_outstanding)
3648 asoc->stream_reset_outstanding--;
3649 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3651 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3652 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3653 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3654 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3656 * Set it up so we don't stop
3659 asoc->stream_reset_outstanding++;
3660 stcb->asoc.str_reset_seq_out--;
3661 asoc->stream_reset_out_is_outstanding = 1;
3664 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3666 if (no_clear == 0) {
3667 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3669 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3670 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3671 number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3672 if (asoc->stream_reset_outstanding)
3673 asoc->stream_reset_outstanding--;
3674 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3675 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3676 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3677 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3678 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3679 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3681 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3682 /* Ok we now may have more streams */
3685 num_stream = stcb->asoc.strm_pending_add_size;
3686 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3688 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3690 stcb->asoc.strm_pending_add_size = 0;
3691 if (asoc->stream_reset_outstanding)
3692 asoc->stream_reset_outstanding--;
3693 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3694 /* Put the new streams into effect */
3697 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3698 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3700 asoc->streamoutcnt += num_stream;
3701 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3702 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3703 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3704 SCTP_STREAM_CHANGE_DENIED);
3706 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3707 SCTP_STREAM_CHANGE_FAILED);
3709 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3710 if (asoc->stream_reset_outstanding)
3711 asoc->stream_reset_outstanding--;
3712 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3713 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3714 SCTP_STREAM_CHANGE_DENIED);
3715 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3716 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3717 SCTP_STREAM_CHANGE_FAILED);
3719 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3721 * a) Adopt the new in tsn.
3723 * c) Adopt the new out-tsn
3725 struct sctp_stream_reset_response_tsn *resp;
3726 struct sctp_forward_tsn_chunk fwdtsn;
3729 if (respin == NULL) {
3733 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3736 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3737 resp = (struct sctp_stream_reset_response_tsn *)respin;
3738 asoc->stream_reset_outstanding--;
3739 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3740 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3741 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3742 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3746 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3747 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3748 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3750 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3751 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3752 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3754 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3755 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3757 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3758 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3760 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3761 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3762 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3763 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3764 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3765 SCTP_ASSOC_RESET_DENIED);
3767 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3768 SCTP_ASSOC_RESET_FAILED);
3771 /* get rid of the request and get the request flags */
3772 if (asoc->stream_reset_outstanding == 0) {
3773 sctp_clean_up_stream_reset(stcb);
3777 if (asoc->stream_reset_outstanding == 0) {
3778 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3784 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3785 struct sctp_tmit_chunk *chk,
3786 struct sctp_stream_reset_in_request *req, int trunc)
3794 * peer wants me to send a str-reset to him for my outgoing seq's if
3797 struct sctp_association *asoc = &stcb->asoc;
3799 seq = ntohl(req->request_seq);
3800 if (asoc->str_reset_seq_in == seq) {
3801 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3802 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3803 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3805 /* Can't do it, since they exceeded our buffer size */
3806 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3807 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3808 len = ntohs(req->ph.param_length);
3809 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3810 if (number_entries) {
3811 for (i = 0; i < number_entries; i++) {
3812 temp = ntohs(req->list_of_streams[i]);
3813 if (temp >= stcb->asoc.streamoutcnt) {
3814 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3817 req->list_of_streams[i] = temp;
3819 for (i = 0; i < number_entries; i++) {
3820 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3821 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3826 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3827 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3828 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3831 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3833 /* Can't do it, since we have sent one out */
3834 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3837 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3838 asoc->str_reset_seq_in++;
3839 } else if (asoc->str_reset_seq_in - 1 == seq) {
3840 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3841 } else if (asoc->str_reset_seq_in - 2 == seq) {
3842 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3844 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3846 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3850 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3851 struct sctp_tmit_chunk *chk,
3852 struct sctp_stream_reset_tsn_request *req)
3854 /* reset all in and out and update the tsn */
3856 * A) reset my str-seq's on in and out. B) Select a receive next,
3857 * and set cum-ack to it. Also process this selected number as a
3858 * fwd-tsn as well. C) set in the response my next sending seq.
3860 struct sctp_forward_tsn_chunk fwdtsn;
3861 struct sctp_association *asoc = &stcb->asoc;
3865 seq = ntohl(req->request_seq);
3866 if (asoc->str_reset_seq_in == seq) {
3867 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3868 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3869 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3871 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3872 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3873 fwdtsn.ch.chunk_flags = 0;
3874 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3875 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3879 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3880 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3881 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3883 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3884 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3885 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3886 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3887 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3888 atomic_add_int(&asoc->sending_seq, 1);
3889 /* save off historical data for retrans */
3890 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3891 asoc->last_sending_seq[0] = asoc->sending_seq;
3892 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3893 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3894 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3895 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3896 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3897 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3899 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3900 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3901 asoc->str_reset_seq_in++;
3902 } else if (asoc->str_reset_seq_in - 1 == seq) {
3903 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3904 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3905 } else if (asoc->str_reset_seq_in - 2 == seq) {
3906 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3907 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3909 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3915 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3916 struct sctp_tmit_chunk *chk,
3917 struct sctp_stream_reset_out_request *req, int trunc)
3920 int number_entries, len;
3921 struct sctp_association *asoc = &stcb->asoc;
3923 seq = ntohl(req->request_seq);
3925 /* now if its not a duplicate we process it */
3926 if (asoc->str_reset_seq_in == seq) {
3927 len = ntohs(req->ph.param_length);
3928 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3930 * the sender is resetting, handle the list issue.. we must
3931 * a) verify if we can do the reset, if so no problem b) If
3932 * we can't do the reset we must copy the request. c) queue
3933 * it, and setup the data in processor to trigger it off
3934 * when needed and dequeue all the queued data.
3936 tsn = ntohl(req->send_reset_at_tsn);
3938 /* move the reset action back one */
3939 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3940 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3941 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3943 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3944 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3945 /* we can do it now */
3946 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3947 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3950 * we must queue it up and thus wait for the TSN's
3951 * to arrive that are at or before tsn
3953 struct sctp_stream_reset_list *liste;
3956 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3957 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3958 siz, SCTP_M_STRESET);
3959 if (liste == NULL) {
3960 /* gak out of memory */
3961 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3962 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3967 liste->number_entries = number_entries;
3968 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3969 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3970 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3972 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3973 asoc->str_reset_seq_in++;
3974 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3976 * one seq back, just echo back last action since my
3977 * response was lost.
3979 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3980 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3982 * two seq back, just echo back last action since my
3983 * response was lost.
3985 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3987 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3992 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3993 struct sctp_stream_reset_add_strm *str_add)
3996 * Peer is requesting to add more streams. If its within our
3997 * max-streams we will allow it.
3999 uint32_t num_stream, i;
4001 struct sctp_association *asoc = &stcb->asoc;
4002 struct sctp_queued_to_read *ctl, *nctl;
4004 /* Get the number. */
4005 seq = ntohl(str_add->request_seq);
4006 num_stream = ntohs(str_add->number_of_streams);
4007 /* Now what would be the new total? */
4008 if (asoc->str_reset_seq_in == seq) {
4009 num_stream += stcb->asoc.streamincnt;
4010 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4011 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4012 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4013 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
4014 (num_stream > 0xffff)) {
4015 /* We must reject it they ask for to many */
4017 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4019 /* Ok, we can do that :-) */
4020 struct sctp_stream_in *oldstrm;
4022 /* save off the old */
4023 oldstrm = stcb->asoc.strmin;
4024 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
4025 (num_stream * sizeof(struct sctp_stream_in)),
4027 if (stcb->asoc.strmin == NULL) {
4028 stcb->asoc.strmin = oldstrm;
4031 /* copy off the old data */
4032 for (i = 0; i < stcb->asoc.streamincnt; i++) {
4033 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4034 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4035 stcb->asoc.strmin[i].sid = i;
4036 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
4037 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
4038 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
4039 /* now anything on those queues? */
4040 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
4041 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
4042 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
4044 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
4045 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
4046 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
4049 /* Init the new streams */
4050 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
4051 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4052 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4053 stcb->asoc.strmin[i].sid = i;
4054 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
4055 stcb->asoc.strmin[i].pd_api_started = 0;
4056 stcb->asoc.strmin[i].delivery_started = 0;
4058 SCTP_FREE(oldstrm, SCTP_M_STRMI);
4059 /* update the size */
4060 stcb->asoc.streamincnt = num_stream;
4061 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4062 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
4064 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4065 asoc->str_reset_seq_in++;
4066 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4068 * one seq back, just echo back last action since my
4069 * response was lost.
4071 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4072 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4074 * two seq back, just echo back last action since my
4075 * response was lost.
4077 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4079 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4085 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4086 struct sctp_stream_reset_add_strm *str_add)
4089 * Peer is requesting to add more streams. If its within our
4090 * max-streams we will allow it.
4092 uint16_t num_stream;
4094 struct sctp_association *asoc = &stcb->asoc;
4096 /* Get the number. */
4097 seq = ntohl(str_add->request_seq);
4098 num_stream = ntohs(str_add->number_of_streams);
4099 /* Now what would be the new total? */
4100 if (asoc->str_reset_seq_in == seq) {
4101 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4102 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4103 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4104 } else if (stcb->asoc.stream_reset_outstanding) {
4105 /* We must reject it we have something pending */
4106 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4108 /* Ok, we can do that :-) */
4111 mychk = stcb->asoc.streamoutcnt;
4112 mychk += num_stream;
4113 if (mychk < 0x10000) {
4114 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4115 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
4116 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4119 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4122 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4123 asoc->str_reset_seq_in++;
4124 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4126 * one seq back, just echo back last action since my
4127 * response was lost.
4129 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4130 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4132 * two seq back, just echo back last action since my
4133 * response was lost.
4135 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4137 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4142 __attribute__((noinline))
4145 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4146 struct sctp_chunkhdr *ch_req)
4148 uint16_t remaining_length, param_len, ptype;
4149 struct sctp_paramhdr pstore;
4150 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4154 struct sctp_tmit_chunk *chk;
4155 struct sctp_chunkhdr *ch;
4156 struct sctp_paramhdr *ph;
4160 /* now it may be a reset or a reset-response */
4161 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
4163 /* setup for adding the response */
4164 sctp_alloc_a_chunk(stcb, chk);
4168 chk->copy_by_ref = 0;
4169 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4170 chk->rec.chunk_id.can_take_data = 0;
4172 chk->asoc = &stcb->asoc;
4173 chk->no_fr_allowed = 0;
4174 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4175 chk->book_size_scale = 0;
4176 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4177 if (chk->data == NULL) {
4180 sctp_m_freem(chk->data);
4183 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4186 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4188 /* setup chunk parameters */
4189 chk->sent = SCTP_DATAGRAM_UNSENT;
4193 ch = mtod(chk->data, struct sctp_chunkhdr *);
4194 ch->chunk_type = SCTP_STREAM_RESET;
4195 ch->chunk_flags = 0;
4196 ch->chunk_length = htons(chk->send_size);
4197 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4198 offset += sizeof(struct sctp_chunkhdr);
4199 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4200 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4205 param_len = ntohs(ph->param_length);
4206 if ((param_len > remaining_length) ||
4207 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4208 /* bad parameter length */
4211 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4212 (uint8_t *)&cstore);
4217 ptype = ntohs(ph->param_type);
4219 if (param_len > sizeof(cstore)) {
4224 if (num_param > SCTP_MAX_RESET_PARAMS) {
4225 /* hit the max of parameters already sorry.. */
4228 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4229 struct sctp_stream_reset_out_request *req_out;
4231 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4234 req_out = (struct sctp_stream_reset_out_request *)ph;
4236 if (stcb->asoc.stream_reset_outstanding) {
4237 seq = ntohl(req_out->response_seq);
4238 if (seq == stcb->asoc.str_reset_seq_out) {
4240 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4243 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4244 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4245 struct sctp_stream_reset_add_strm *str_add;
4247 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4250 str_add = (struct sctp_stream_reset_add_strm *)ph;
4252 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4253 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4254 struct sctp_stream_reset_add_strm *str_add;
4256 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4259 str_add = (struct sctp_stream_reset_add_strm *)ph;
4261 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4262 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4263 struct sctp_stream_reset_in_request *req_in;
4266 req_in = (struct sctp_stream_reset_in_request *)ph;
4267 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4268 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4269 struct sctp_stream_reset_tsn_request *req_tsn;
4272 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4273 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4275 goto strres_nochunk;
4279 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4280 struct sctp_stream_reset_response *resp;
4283 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4286 resp = (struct sctp_stream_reset_response *)ph;
4287 seq = ntohl(resp->response_seq);
4288 result = ntohl(resp->result);
4289 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4291 goto strres_nochunk;
4296 offset += SCTP_SIZE32(param_len);
4297 if (remaining_length >= SCTP_SIZE32(param_len)) {
4298 remaining_length -= SCTP_SIZE32(param_len);
4300 remaining_length = 0;
4304 /* we have no response free the stuff */
4305 goto strres_nochunk;
4307 /* ok we have a chunk to link in */
4308 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4311 stcb->asoc.ctrl_queue_cnt++;
4316 * Handle a router or endpoints report of a packet loss, there are two ways
4317 * to handle this, either we get the whole packet and must disect it
4318 * ourselves (possibly with truncation and or corruption) or it is a summary
4319 * from a middle box that did the disectting for us.
4322 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4323 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4325 uint32_t bottle_bw, on_queue;
4329 struct sctp_chunk_desc desc;
4330 struct sctp_chunkhdr *ch;
4332 chlen = ntohs(cp->ch.chunk_length);
4333 chlen -= sizeof(struct sctp_pktdrop_chunk);
4334 /* XXX possible chlen underflow */
4337 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4338 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4340 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4341 chlen -= sizeof(struct sctphdr);
4342 /* XXX possible chlen underflow */
4343 memset(&desc, 0, sizeof(desc));
4345 trunc_len = (uint16_t)ntohs(cp->trunc_len);
4346 if (trunc_len > limit) {
4349 /* now the chunks themselves */
4350 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4351 desc.chunk_type = ch->chunk_type;
4352 /* get amount we need to move */
4353 at = ntohs(ch->chunk_length);
4354 if (at < sizeof(struct sctp_chunkhdr)) {
4355 /* corrupt chunk, maybe at the end? */
4356 SCTP_STAT_INCR(sctps_pdrpcrupt);
4359 if (trunc_len == 0) {
4360 /* we are supposed to have all of it */
4362 /* corrupt skip it */
4363 SCTP_STAT_INCR(sctps_pdrpcrupt);
4367 /* is there enough of it left ? */
4368 if (desc.chunk_type == SCTP_DATA) {
4369 if (chlen < (sizeof(struct sctp_data_chunk) +
4370 sizeof(desc.data_bytes))) {
4374 if (chlen < sizeof(struct sctp_chunkhdr)) {
4379 if (desc.chunk_type == SCTP_DATA) {
4380 /* can we get out the tsn? */
4381 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4382 SCTP_STAT_INCR(sctps_pdrpmbda);
4384 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4386 struct sctp_data_chunk *dcp;
4390 dcp = (struct sctp_data_chunk *)ch;
4391 ddp = (uint8_t *)(dcp + 1);
4392 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4393 desc.data_bytes[iii] = ddp[iii];
4395 desc.tsn_ifany = dcp->dp.tsn;
4397 /* nope we are done. */
4398 SCTP_STAT_INCR(sctps_pdrpnedat);
4402 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4403 SCTP_STAT_INCR(sctps_pdrpmbct);
4406 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4407 SCTP_STAT_INCR(sctps_pdrppdbrk);
4410 if (SCTP_SIZE32(at) > chlen) {
4413 chlen -= SCTP_SIZE32(at);
4414 if (chlen < sizeof(struct sctp_chunkhdr)) {
4415 /* done, none left */
4418 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4420 /* Now update any rwnd --- possibly */
4421 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4422 /* From a peer, we get a rwnd report */
4425 SCTP_STAT_INCR(sctps_pdrpfehos);
4427 bottle_bw = ntohl(cp->bottle_bw);
4428 on_queue = ntohl(cp->current_onq);
4429 if (bottle_bw && on_queue) {
4430 /* a rwnd report is in here */
4431 if (bottle_bw > on_queue)
4432 a_rwnd = bottle_bw - on_queue;
4437 stcb->asoc.peers_rwnd = 0;
4439 if (a_rwnd > stcb->asoc.total_flight) {
4440 stcb->asoc.peers_rwnd =
4441 a_rwnd - stcb->asoc.total_flight;
4443 stcb->asoc.peers_rwnd = 0;
4445 if (stcb->asoc.peers_rwnd <
4446 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4447 /* SWS sender side engages */
4448 stcb->asoc.peers_rwnd = 0;
4453 SCTP_STAT_INCR(sctps_pdrpfmbox);
4456 /* now middle boxes in sat networks get a cwnd bump */
4457 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4458 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4459 (stcb->asoc.sat_network)) {
4461 * This is debatable but for sat networks it makes sense
4462 * Note if a T3 timer has went off, we will prohibit any
4463 * changes to cwnd until we exit the t3 loss recovery.
4465 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4466 net, cp, &bottle_bw, &on_queue);
4471 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4472 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4473 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4474 * length of the complete packet outputs: - length: modified to remaining
4475 * length after control processing - netp: modified to new sctp_nets after
4476 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4477 * bad packet,...) otherwise return the tcb for this packet
4480 __attribute__((noinline))
4482 static struct sctp_tcb *
4483 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4484 struct sockaddr *src, struct sockaddr *dst,
4485 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4486 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4487 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4488 uint32_t vrf_id, uint16_t port)
4490 struct sctp_association *asoc;
4491 struct mbuf *op_err;
4492 char msg[SCTP_DIAG_INFO_LEN];
4494 int num_chunks = 0; /* number of control chunks processed */
4495 uint32_t chk_length;
4497 int abort_no_unlock = 0;
4501 * How big should this be, and should it be alloc'd? Lets try the
4502 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4503 * until we get into jumbo grams and such..
4505 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4506 struct sctp_tcb *locked_tcb = stcb;
4508 uint32_t auth_offset = 0, auth_len = 0;
4509 int auth_skipped = 0;
4511 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4515 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4516 iphlen, *offset, length, (void *)stcb);
4518 /* validate chunk header length... */
4519 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4520 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4521 ntohs(ch->chunk_length));
4523 SCTP_TCB_UNLOCK(locked_tcb);
4528 * validate the verification tag
4530 vtag_in = ntohl(sh->v_tag);
4533 SCTP_TCB_LOCK_ASSERT(locked_tcb);
4535 if (ch->chunk_type == SCTP_INITIATION) {
4536 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4537 ntohs(ch->chunk_length), vtag_in);
4539 /* protocol error- silently discard... */
4540 SCTP_STAT_INCR(sctps_badvtag);
4542 SCTP_TCB_UNLOCK(locked_tcb);
4546 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4548 * If there is no stcb, skip the AUTH chunk and process
4549 * later after a stcb is found (to validate the lookup was
4552 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4554 (inp->auth_supported == 1)) {
4555 /* save this chunk for later processing */
4557 auth_offset = *offset;
4558 auth_len = ntohs(ch->chunk_length);
4560 /* (temporarily) move past this chunk */
4561 *offset += SCTP_SIZE32(auth_len);
4562 if (*offset >= length) {
4563 /* no more data left in the mbuf chain */
4566 SCTP_TCB_UNLOCK(locked_tcb);
4570 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4571 sizeof(struct sctp_chunkhdr), chunk_buf);
4577 SCTP_TCB_UNLOCK(locked_tcb);
4581 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4582 goto process_control_chunks;
4585 * first check if it's an ASCONF with an unknown src addr we
4586 * need to look inside to find the association
4588 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4589 struct sctp_chunkhdr *asconf_ch = ch;
4590 uint32_t asconf_offset = 0, asconf_len = 0;
4592 /* inp's refcount may be reduced */
4593 SCTP_INP_INCR_REF(inp);
4595 asconf_offset = *offset;
4597 asconf_len = ntohs(asconf_ch->chunk_length);
4598 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4600 stcb = sctp_findassociation_ep_asconf(m,
4603 sh, &inp, netp, vrf_id);
4606 asconf_offset += SCTP_SIZE32(asconf_len);
4607 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4608 sizeof(struct sctp_chunkhdr), chunk_buf);
4609 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4612 * reduce inp's refcount if not reduced in
4613 * sctp_findassociation_ep_asconf().
4615 SCTP_INP_DECR_REF(inp);
4620 /* now go back and verify any auth chunk to be sure */
4621 if (auth_skipped && (stcb != NULL)) {
4622 struct sctp_auth_chunk *auth;
4624 auth = (struct sctp_auth_chunk *)
4625 sctp_m_getptr(m, auth_offset,
4626 auth_len, chunk_buf);
4629 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4631 /* auth HMAC failed so dump it */
4634 SCTP_TCB_UNLOCK(locked_tcb);
4638 /* remaining chunks are HMAC checked */
4639 stcb->asoc.authenticated = 1;
4644 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4645 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4647 /* no association, so it's out of the blue... */
4648 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4649 mflowtype, mflowid, inp->fibnum,
4653 SCTP_TCB_UNLOCK(locked_tcb);
4658 /* ABORT and SHUTDOWN can use either v_tag... */
4659 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4660 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4661 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4662 /* Take the T-bit always into account. */
4663 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4664 (vtag_in == asoc->my_vtag)) ||
4665 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4666 (vtag_in == asoc->peer_vtag))) {
4669 /* drop this packet... */
4670 SCTP_STAT_INCR(sctps_badvtag);
4672 SCTP_TCB_UNLOCK(locked_tcb);
4676 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4677 if (vtag_in != asoc->my_vtag) {
4679 * this could be a stale SHUTDOWN-ACK or the
4680 * peer never got the SHUTDOWN-COMPLETE and
4681 * is still hung; we have started a new asoc
4682 * but it won't complete until the shutdown
4686 SCTP_TCB_UNLOCK(locked_tcb);
4688 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4689 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4691 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4693 mflowtype, mflowid, fibnum,
4698 /* for all other chunks, vtag must match */
4699 if (vtag_in != asoc->my_vtag) {
4700 /* invalid vtag... */
4701 SCTPDBG(SCTP_DEBUG_INPUT3,
4702 "invalid vtag: %xh, expect %xh\n",
4703 vtag_in, asoc->my_vtag);
4704 SCTP_STAT_INCR(sctps_badvtag);
4706 SCTP_TCB_UNLOCK(locked_tcb);
4712 } /* end if !SCTP_COOKIE_ECHO */
4714 * process all control chunks...
4716 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4717 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4718 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4719 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
4720 /* implied cookie-ack.. we must have lost the ack */
4721 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
4722 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
4723 stcb->asoc.overall_error_count,
4725 SCTP_FROM_SCTP_INPUT,
4728 stcb->asoc.overall_error_count = 0;
4729 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4732 process_control_chunks:
4733 while (IS_SCTP_CONTROL(ch)) {
4734 /* validate chunk length */
4735 chk_length = ntohs(ch->chunk_length);
4736 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4737 ch->chunk_type, chk_length);
4738 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4739 if (chk_length < sizeof(*ch) ||
4740 (*offset + (int)chk_length) > length) {
4743 SCTP_TCB_UNLOCK(locked_tcb);
4747 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4749 * INIT-ACK only gets the init ack "header" portion only
4750 * because we don't have to process the peer's COOKIE. All
4751 * others get a complete chunk.
4753 if ((ch->chunk_type == SCTP_INITIATION_ACK) ||
4754 (ch->chunk_type == SCTP_INITIATION)) {
4755 /* get an init-ack chunk */
4756 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4757 sizeof(struct sctp_init_ack_chunk), chunk_buf);
4761 SCTP_TCB_UNLOCK(locked_tcb);
4766 /* For cookies and all other chunks. */
4767 if (chk_length > sizeof(chunk_buf)) {
4769 * use just the size of the chunk buffer so
4770 * the front part of our chunks fit in
4771 * contiguous space up to the chunk buffer
4772 * size (508 bytes). For chunks that need to
4773 * get more than that they must use the
4774 * sctp_m_getptr() function or other means
4775 * (e.g. know how to parse mbuf chains).
4776 * Cookies do this already.
4778 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4779 (sizeof(chunk_buf) - 4),
4784 SCTP_TCB_UNLOCK(locked_tcb);
4789 /* We can fit it all */
4790 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4791 chk_length, chunk_buf);
4793 SCTP_PRINTF("sctp_process_control: Can't get the all data....\n");
4796 SCTP_TCB_UNLOCK(locked_tcb);
4803 /* Save off the last place we got a control from */
4805 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4807 * allow last_control to be NULL if
4808 * ASCONF... ASCONF processing will find the
4811 if ((netp != NULL) && (*netp != NULL))
4812 stcb->asoc.last_control_chunk_from = *netp;
4815 #ifdef SCTP_AUDITING_ENABLED
4816 sctp_audit_log(0xB0, ch->chunk_type);
4819 /* check to see if this chunk required auth, but isn't */
4820 if ((stcb != NULL) &&
4821 (stcb->asoc.auth_supported == 1) &&
4822 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4823 !stcb->asoc.authenticated) {
4824 /* "silently" ignore */
4825 SCTP_STAT_INCR(sctps_recvauthmissing);
4828 switch (ch->chunk_type) {
4829 case SCTP_INITIATION:
4830 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4831 /* The INIT chunk must be the only chunk. */
4832 if ((num_chunks > 1) ||
4833 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4834 /* RFC 4960 requires that no ABORT is sent */
4837 SCTP_TCB_UNLOCK(locked_tcb);
4841 /* Honor our resource limit. */
4842 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4843 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4844 sctp_abort_association(inp, stcb, m, iphlen,
4845 src, dst, sh, op_err,
4851 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4852 (struct sctp_init_chunk *)ch, inp,
4853 stcb, *netp, &abort_no_unlock,
4857 if ((!abort_no_unlock) && (locked_tcb)) {
4858 SCTP_TCB_UNLOCK(locked_tcb);
4862 case SCTP_PAD_CHUNK:
4864 case SCTP_INITIATION_ACK:
4865 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT-ACK\n");
4866 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4867 /* We are not interested anymore */
4868 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4871 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
4873 SCTP_TCB_UNLOCK(locked_tcb);
4877 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4878 so = SCTP_INP_SO(inp);
4879 atomic_add_int(&stcb->asoc.refcnt, 1);
4880 SCTP_TCB_UNLOCK(stcb);
4881 SCTP_SOCKET_LOCK(so, 1);
4882 SCTP_TCB_LOCK(stcb);
4883 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4885 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4886 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4887 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4888 SCTP_SOCKET_UNLOCK(so, 1);
4894 /* The INIT-ACK chunk must be the only chunk. */
4895 if ((num_chunks > 1) ||
4896 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4899 SCTP_TCB_UNLOCK(locked_tcb);
4903 if ((netp) && (*netp)) {
4904 ret = sctp_handle_init_ack(m, iphlen, *offset,
4906 (struct sctp_init_ack_chunk *)ch,
4915 if (abort_no_unlock) {
4919 * Special case, I must call the output routine to
4920 * get the cookie echoed
4922 if ((stcb != NULL) && (ret == 0)) {
4923 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4926 SCTP_TCB_UNLOCK(locked_tcb);
4930 case SCTP_SELECTIVE_ACK:
4932 struct sctp_sack_chunk *sack;
4934 uint32_t a_rwnd, cum_ack;
4935 uint16_t num_seg, num_dup;
4937 int offset_seg, offset_dup;
4939 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK\n");
4940 SCTP_STAT_INCR(sctps_recvsacks);
4942 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing SACK chunk\n");
4945 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4946 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4949 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4951 * If we have sent a shutdown-ack, we will pay no
4952 * attention to a sack sent in to us since
4953 * we don't care anymore.
4957 sack = (struct sctp_sack_chunk *)ch;
4958 flags = ch->chunk_flags;
4959 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4960 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4961 num_dup = ntohs(sack->sack.num_dup_tsns);
4962 a_rwnd = (uint32_t)ntohl(sack->sack.a_rwnd);
4963 if (sizeof(struct sctp_sack_chunk) +
4964 num_seg * sizeof(struct sctp_gap_ack_block) +
4965 num_dup * sizeof(uint32_t) != chk_length) {
4966 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4969 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4970 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4971 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4972 cum_ack, num_seg, a_rwnd);
4973 stcb->asoc.seen_a_sack_this_pkt = 1;
4974 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4976 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4977 (stcb->asoc.saw_sack_with_frags == 0) &&
4978 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4979 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))
4982 * We have a SIMPLE sack having no
4983 * prior segments and data on sent
4984 * queue to be acked.. Use the
4985 * faster path sack processing. We
4986 * also allow window update sacks
4987 * with no missing segments to go
4990 sctp_express_handle_sack(stcb, cum_ack, a_rwnd, &abort_now, ecne_seen);
4993 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4994 num_seg, 0, num_dup, &abort_now, flags,
4995 cum_ack, a_rwnd, ecne_seen);
4998 /* ABORT signal from sack processing */
5002 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
5003 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
5004 (stcb->asoc.stream_queue_cnt == 0)) {
5005 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
5010 * EY - nr_sack: If the received chunk is an
5013 case SCTP_NR_SELECTIVE_ACK:
5015 struct sctp_nr_sack_chunk *nr_sack;
5017 uint32_t a_rwnd, cum_ack;
5018 uint16_t num_seg, num_nr_seg, num_dup;
5020 int offset_seg, offset_dup;
5022 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK\n");
5023 SCTP_STAT_INCR(sctps_recvsacks);
5025 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing NR-SACK chunk\n");
5028 if (stcb->asoc.nrsack_supported == 0) {
5031 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
5032 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR-SACK chunk, too small\n");
5035 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
5037 * If we have sent a shutdown-ack, we will pay no
5038 * attention to a sack sent in to us since
5039 * we don't care anymore.
5043 nr_sack = (struct sctp_nr_sack_chunk *)ch;
5044 flags = ch->chunk_flags;
5045 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
5046 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
5047 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
5048 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
5049 a_rwnd = (uint32_t)ntohl(nr_sack->nr_sack.a_rwnd);
5050 if (sizeof(struct sctp_nr_sack_chunk) +
5051 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
5052 num_dup * sizeof(uint32_t) != chk_length) {
5053 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
5056 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
5057 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
5058 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
5059 cum_ack, num_seg, a_rwnd);
5060 stcb->asoc.seen_a_sack_this_pkt = 1;
5061 if ((stcb->asoc.pr_sctp_cnt == 0) &&
5062 (num_seg == 0) && (num_nr_seg == 0) &&
5063 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
5064 (stcb->asoc.saw_sack_with_frags == 0) &&
5065 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
5066 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
5068 * We have a SIMPLE sack having no
5069 * prior segments and data on sent
5070 * queue to be acked. Use the faster
5071 * path sack processing. We also
5072 * allow window update sacks with no
5073 * missing segments to go this way
5076 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
5077 &abort_now, ecne_seen);
5080 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
5081 num_seg, num_nr_seg, num_dup, &abort_now, flags,
5082 cum_ack, a_rwnd, ecne_seen);
5085 /* ABORT signal from sack processing */
5089 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
5090 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
5091 (stcb->asoc.stream_queue_cnt == 0)) {
5092 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
5097 case SCTP_HEARTBEAT_REQUEST:
5098 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
5099 if ((stcb) && netp && *netp) {
5100 SCTP_STAT_INCR(sctps_recvheartbeat);
5101 sctp_send_heartbeat_ack(stcb, m, *offset,
5104 /* He's alive so give him credit */
5105 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5106 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5107 stcb->asoc.overall_error_count,
5109 SCTP_FROM_SCTP_INPUT,
5112 stcb->asoc.overall_error_count = 0;
5115 case SCTP_HEARTBEAT_ACK:
5116 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT-ACK\n");
5117 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5121 SCTP_TCB_UNLOCK(locked_tcb);
5125 /* He's alive so give him credit */
5126 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5127 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5128 stcb->asoc.overall_error_count,
5130 SCTP_FROM_SCTP_INPUT,
5133 stcb->asoc.overall_error_count = 0;
5134 SCTP_STAT_INCR(sctps_recvheartbeatack);
5136 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5139 case SCTP_ABORT_ASSOCIATION:
5140 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5142 if ((stcb) && netp && *netp)
5143 sctp_handle_abort((struct sctp_abort_chunk *)ch,
5149 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5151 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5154 SCTP_TCB_UNLOCK(locked_tcb);
5158 if (netp && *netp) {
5161 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5162 stcb, *netp, &abort_flag);
5169 case SCTP_SHUTDOWN_ACK:
5170 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-ACK, stcb %p\n", (void *)stcb);
5171 if ((stcb) && (netp) && (*netp))
5172 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5177 case SCTP_OPERATION_ERROR:
5178 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP-ERR\n");
5179 if ((stcb) && netp && *netp && sctp_handle_error(ch, stcb, *netp) < 0) {
5184 case SCTP_COOKIE_ECHO:
5185 SCTPDBG(SCTP_DEBUG_INPUT3,
5186 "SCTP_COOKIE-ECHO, stcb %p\n", (void *)stcb);
5187 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5190 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5191 /* We are not interested anymore */
5194 SCTP_TCB_UNLOCK(stcb);
5201 * First are we accepting? We do this again here
5202 * since it is possible that a previous endpoint WAS
5203 * listening responded to a INIT-ACK and then
5204 * closed. We opened and bound.. and are now no
5208 if ((stcb == NULL) && (inp->sctp_socket->so_qlen >= inp->sctp_socket->so_qlimit)) {
5209 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5210 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5211 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5212 sctp_abort_association(inp, stcb, m, iphlen,
5213 src, dst, sh, op_err,
5220 struct mbuf *ret_buf;
5221 struct sctp_inpcb *linp;
5230 SCTP_ASOC_CREATE_LOCK(linp);
5231 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5232 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5233 SCTP_ASOC_CREATE_UNLOCK(linp);
5239 sctp_handle_cookie_echo(m, iphlen,
5243 (struct sctp_cookie_echo_chunk *)ch,
5257 SCTP_ASOC_CREATE_UNLOCK(linp);
5259 if (ret_buf == NULL) {
5261 SCTP_TCB_UNLOCK(locked_tcb);
5263 SCTPDBG(SCTP_DEBUG_INPUT3,
5264 "GAK, null buffer\n");
5268 /* if AUTH skipped, see if it verified... */
5273 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
5275 * Restart the timer if we have
5278 struct sctp_tmit_chunk *chk;
5280 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
5281 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5285 case SCTP_COOKIE_ACK:
5286 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE-ACK, stcb %p\n", (void *)stcb);
5287 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5289 SCTP_TCB_UNLOCK(locked_tcb);
5293 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5294 /* We are not interested anymore */
5295 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5298 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5299 so = SCTP_INP_SO(inp);
5300 atomic_add_int(&stcb->asoc.refcnt, 1);
5301 SCTP_TCB_UNLOCK(stcb);
5302 SCTP_SOCKET_LOCK(so, 1);
5303 SCTP_TCB_LOCK(stcb);
5304 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5306 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5307 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
5308 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5309 SCTP_SOCKET_UNLOCK(so, 1);
5315 /* He's alive so give him credit */
5316 if ((stcb) && netp && *netp) {
5317 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5318 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5319 stcb->asoc.overall_error_count,
5321 SCTP_FROM_SCTP_INPUT,
5324 stcb->asoc.overall_error_count = 0;
5325 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5329 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-ECHO\n");
5330 /* He's alive so give him credit */
5331 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5334 SCTP_TCB_UNLOCK(locked_tcb);
5340 if (stcb->asoc.ecn_supported == 0) {
5343 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5344 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5345 stcb->asoc.overall_error_count,
5347 SCTP_FROM_SCTP_INPUT,
5350 stcb->asoc.overall_error_count = 0;
5351 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch,
5357 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-CWR\n");
5358 /* He's alive so give him credit */
5359 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5362 SCTP_TCB_UNLOCK(locked_tcb);
5368 if (stcb->asoc.ecn_supported == 0) {
5371 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5372 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5373 stcb->asoc.overall_error_count,
5375 SCTP_FROM_SCTP_INPUT,
5378 stcb->asoc.overall_error_count = 0;
5379 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5382 case SCTP_SHUTDOWN_COMPLETE:
5383 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-COMPLETE, stcb %p\n", (void *)stcb);
5384 /* must be first and only chunk */
5385 if ((num_chunks > 1) ||
5386 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5389 SCTP_TCB_UNLOCK(locked_tcb);
5393 if ((stcb) && netp && *netp) {
5394 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5401 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5402 /* He's alive so give him credit */
5404 if (stcb->asoc.asconf_supported == 0) {
5407 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5408 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5409 stcb->asoc.overall_error_count,
5411 SCTP_FROM_SCTP_INPUT,
5414 stcb->asoc.overall_error_count = 0;
5415 sctp_handle_asconf(m, *offset, src,
5416 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5420 case SCTP_ASCONF_ACK:
5421 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF-ACK\n");
5422 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5425 SCTP_TCB_UNLOCK(locked_tcb);
5430 if ((stcb) && netp && *netp) {
5431 if (stcb->asoc.asconf_supported == 0) {
5434 /* He's alive so give him credit */
5435 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5436 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5437 stcb->asoc.overall_error_count,
5439 SCTP_FROM_SCTP_INPUT,
5442 stcb->asoc.overall_error_count = 0;
5443 sctp_handle_asconf_ack(m, *offset,
5444 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5445 if (abort_no_unlock)
5449 case SCTP_FORWARD_CUM_TSN:
5450 case SCTP_IFORWARD_CUM_TSN:
5451 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD-TSN\n");
5452 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5455 SCTP_TCB_UNLOCK(locked_tcb);
5460 /* He's alive so give him credit */
5464 if (stcb->asoc.prsctp_supported == 0) {
5467 stcb->asoc.overall_error_count = 0;
5468 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5469 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5470 stcb->asoc.overall_error_count,
5472 SCTP_FROM_SCTP_INPUT,
5476 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5477 /* We are not interested anymore */
5478 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5479 so = SCTP_INP_SO(inp);
5480 atomic_add_int(&stcb->asoc.refcnt, 1);
5481 SCTP_TCB_UNLOCK(stcb);
5482 SCTP_SOCKET_LOCK(so, 1);
5483 SCTP_TCB_LOCK(stcb);
5484 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5486 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5487 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5488 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5489 SCTP_SOCKET_UNLOCK(so, 1);
5495 * For sending a SACK this looks like DATA
5498 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5499 sctp_handle_forward_tsn(stcb,
5500 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5505 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5506 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5507 stcb->asoc.overall_error_count,
5509 SCTP_FROM_SCTP_INPUT,
5512 stcb->asoc.overall_error_count = 0;
5517 case SCTP_STREAM_RESET:
5518 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5519 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5522 SCTP_TCB_UNLOCK(locked_tcb);
5527 if (stcb->asoc.reconfig_supported == 0) {
5530 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5531 /* stop processing */
5536 case SCTP_PACKET_DROPPED:
5537 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5538 /* re-get it all please */
5539 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5542 SCTP_TCB_UNLOCK(locked_tcb);
5547 if (ch && (stcb) && netp && (*netp)) {
5548 if (stcb->asoc.pktdrop_supported == 0) {
5551 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5553 min(chk_length, (sizeof(chunk_buf) - 4)));
5557 case SCTP_AUTHENTICATION:
5558 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5560 /* save the first AUTH for later processing */
5561 if (auth_skipped == 0) {
5562 auth_offset = *offset;
5563 auth_len = chk_length;
5566 /* skip this chunk (temporarily) */
5569 if (stcb->asoc.auth_supported == 0) {
5572 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5573 (chk_length > (sizeof(struct sctp_auth_chunk) +
5574 SCTP_AUTH_DIGEST_LEN_MAX))) {
5577 SCTP_TCB_UNLOCK(locked_tcb);
5582 if (got_auth == 1) {
5583 /* skip this chunk... it's already auth'd */
5587 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5589 /* auth HMAC failed so dump the packet */
5593 /* remaining chunks are HMAC checked */
5594 stcb->asoc.authenticated = 1;
5600 /* it's an unknown chunk! */
5601 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5602 struct sctp_gen_error_cause *cause;
5605 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5606 0, M_NOWAIT, 1, MT_DATA);
5607 if (op_err != NULL) {
5608 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5609 cause = mtod(op_err, struct sctp_gen_error_cause *);
5610 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5611 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5612 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5613 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5614 if (SCTP_BUF_NEXT(op_err) != NULL) {
5615 #ifdef SCTP_MBUF_LOGGING
5616 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5617 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5620 sctp_queue_op_err(stcb, op_err);
5622 sctp_m_freem(op_err);
5626 if ((ch->chunk_type & 0x80) == 0) {
5627 /* discard this packet */
5630 } /* else skip this bad chunk and continue... */
5632 } /* switch (ch->chunk_type) */
5636 /* get the next chunk */
5637 *offset += SCTP_SIZE32(chk_length);
5638 if (*offset >= length) {
5639 /* no more data left in the mbuf chain */
5642 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5643 sizeof(struct sctp_chunkhdr), chunk_buf);
5646 SCTP_TCB_UNLOCK(locked_tcb);
5653 if (asconf_cnt > 0 && stcb != NULL) {
5654 sctp_send_asconf_ack(stcb);
5661 * common input chunk processing (v4 and v6)
5664 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5665 struct sockaddr *src, struct sockaddr *dst,
5666 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5667 #if !defined(SCTP_WITH_NO_CSUM)
5668 uint8_t compute_crc,
5671 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5672 uint32_t vrf_id, uint16_t port)
5675 int fwd_tsn_seen = 0, data_processed = 0;
5676 struct mbuf *m = *mm, *op_err;
5677 char msg[SCTP_DIAG_INFO_LEN];
5679 int cnt_ctrl_ready = 0;
5680 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5681 struct sctp_tcb *stcb = NULL;
5682 struct sctp_nets *net = NULL;
5684 SCTP_STAT_INCR(sctps_recvdatagrams);
5685 #ifdef SCTP_AUDITING_ENABLED
5686 sctp_audit_log(0xE0, 1);
5687 sctp_auditing(0, inp, stcb, net);
5689 #if !defined(SCTP_WITH_NO_CSUM)
5690 if (compute_crc != 0) {
5691 uint32_t check, calc_check;
5693 check = sh->checksum;
5695 calc_check = sctp_calculate_cksum(m, iphlen);
5696 sh->checksum = check;
5697 if (calc_check != check) {
5698 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5699 calc_check, check, (void *)m, length, iphlen);
5700 stcb = sctp_findassociation_addr(m, offset, src, dst,
5701 sh, ch, &inp, &net, vrf_id);
5702 #if defined(INET) || defined(INET6)
5703 if ((ch->chunk_type != SCTP_INITIATION) &&
5704 (net != NULL) && (net->port != port)) {
5705 if (net->port == 0) {
5706 /* UDP encapsulation turned on. */
5707 net->mtu -= sizeof(struct udphdr);
5708 if (stcb->asoc.smallest_mtu > net->mtu) {
5709 sctp_pathmtu_adjustment(stcb, net->mtu);
5711 } else if (port == 0) {
5712 /* UDP encapsulation turned off. */
5713 net->mtu += sizeof(struct udphdr);
5714 /* XXX Update smallest_mtu */
5720 net->flowtype = mflowtype;
5721 net->flowid = mflowid;
5723 if ((inp != NULL) && (stcb != NULL)) {
5724 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5725 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5726 } else if ((inp != NULL) && (stcb == NULL)) {
5729 SCTP_STAT_INCR(sctps_badsum);
5730 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5735 /* Destination port of 0 is illegal, based on RFC4960. */
5736 if (sh->dest_port == 0) {
5737 SCTP_STAT_INCR(sctps_hdrops);
5740 stcb = sctp_findassociation_addr(m, offset, src, dst,
5741 sh, ch, &inp, &net, vrf_id);
5742 #if defined(INET) || defined(INET6)
5743 if ((ch->chunk_type != SCTP_INITIATION) &&
5744 (net != NULL) && (net->port != port)) {
5745 if (net->port == 0) {
5746 /* UDP encapsulation turned on. */
5747 net->mtu -= sizeof(struct udphdr);
5748 if (stcb->asoc.smallest_mtu > net->mtu) {
5749 sctp_pathmtu_adjustment(stcb, net->mtu);
5751 } else if (port == 0) {
5752 /* UDP encapsulation turned off. */
5753 net->mtu += sizeof(struct udphdr);
5754 /* XXX Update smallest_mtu */
5760 net->flowtype = mflowtype;
5761 net->flowid = mflowid;
5764 SCTP_STAT_INCR(sctps_noport);
5765 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5768 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5769 sctp_send_shutdown_complete2(src, dst, sh,
5770 mflowtype, mflowid, fibnum,
5774 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5777 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5778 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5779 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5780 (ch->chunk_type != SCTP_INIT))) {
5781 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5783 sctp_send_abort(m, iphlen, src, dst,
5785 mflowtype, mflowid, fibnum,
5790 } else if (stcb == NULL) {
5793 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5794 (void *)m, iphlen, offset, length, (void *)stcb);
5796 /* always clear this before beginning a packet */
5797 stcb->asoc.authenticated = 0;
5798 stcb->asoc.seen_a_sack_this_pkt = 0;
5799 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5800 (void *)stcb, stcb->asoc.state);
5802 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5803 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5805 * If we hit here, we had a ref count
5806 * up when the assoc was aborted and the
5807 * timer is clearing out the assoc, we should
5808 * NOT respond to any packet.. its OOTB.
5810 SCTP_TCB_UNLOCK(stcb);
5812 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5813 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5815 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5816 mflowtype, mflowid, inp->fibnum,
5821 if (IS_SCTP_CONTROL(ch)) {
5822 /* process the control portion of the SCTP packet */
5823 /* sa_ignore NO_NULL_CHK */
5824 stcb = sctp_process_control(m, iphlen, &offset, length,
5826 inp, stcb, &net, &fwd_tsn_seen,
5827 mflowtype, mflowid, fibnum,
5831 * This covers us if the cookie-echo was there and
5832 * it changes our INP.
5834 inp = stcb->sctp_ep;
5835 #if defined(INET) || defined(INET6)
5836 if ((ch->chunk_type != SCTP_INITIATION) &&
5837 (net != NULL) && (net->port != port)) {
5838 if (net->port == 0) {
5839 /* UDP encapsulation turned on. */
5840 net->mtu -= sizeof(struct udphdr);
5841 if (stcb->asoc.smallest_mtu > net->mtu) {
5842 sctp_pathmtu_adjustment(stcb, net->mtu);
5844 } else if (port == 0) {
5845 /* UDP encapsulation turned off. */
5846 net->mtu += sizeof(struct udphdr);
5847 /* XXX Update smallest_mtu */
5855 * no control chunks, so pre-process DATA chunks (these
5856 * checks are taken care of by control processing)
5860 * if DATA only packet, and auth is required, then punt...
5861 * can't have authenticated without any AUTH (control)
5864 if ((stcb != NULL) &&
5865 (stcb->asoc.auth_supported == 1) &&
5866 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5867 /* "silently" ignore */
5868 SCTP_STAT_INCR(sctps_recvauthmissing);
5872 /* out of the blue DATA chunk */
5873 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5874 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5876 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5877 mflowtype, mflowid, fibnum,
5881 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5882 /* v_tag mismatch! */
5883 SCTP_STAT_INCR(sctps_badvtag);
5890 * no valid TCB for this packet, or we found it's a bad
5891 * packet while processing control, or we're done with this
5892 * packet (done or skip rest of data), so we drop it...
5897 * DATA chunk processing
5899 /* plow through the data chunks while length > offset */
5902 * Rest should be DATA only. Check authentication state if AUTH for
5905 if ((length > offset) &&
5907 (stcb->asoc.auth_supported == 1) &&
5908 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5909 !stcb->asoc.authenticated) {
5910 /* "silently" ignore */
5911 SCTP_STAT_INCR(sctps_recvauthmissing);
5912 SCTPDBG(SCTP_DEBUG_AUTH1,
5913 "Data chunk requires AUTH, skipped\n");
5916 if (length > offset) {
5920 * First check to make sure our state is correct. We would
5921 * not get here unless we really did have a tag, so we don't
5922 * abort if this happens, just dump the chunk silently.
5924 switch (SCTP_GET_STATE(&stcb->asoc)) {
5925 case SCTP_STATE_COOKIE_ECHOED:
5927 * we consider data with valid tags in this state
5928 * shows us the cookie-ack was lost. Imply it was
5931 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5932 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5933 stcb->asoc.overall_error_count,
5935 SCTP_FROM_SCTP_INPUT,
5938 stcb->asoc.overall_error_count = 0;
5939 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5941 case SCTP_STATE_COOKIE_WAIT:
5943 * We consider OOTB any data sent during asoc setup.
5945 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5946 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5948 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5949 mflowtype, mflowid, inp->fibnum,
5952 /* sa_ignore NOTREACHED */
5954 case SCTP_STATE_EMPTY: /* should not happen */
5955 case SCTP_STATE_INUSE: /* should not happen */
5956 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5957 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5960 /* sa_ignore NOTREACHED */
5962 case SCTP_STATE_OPEN:
5963 case SCTP_STATE_SHUTDOWN_SENT:
5966 /* plow through the data chunks while length > offset */
5967 retval = sctp_process_data(mm, iphlen, &offset, length,
5968 inp, stcb, net, &high_tsn);
5971 * The association aborted, NO UNLOCK needed since
5972 * the association is destroyed.
5979 * Anything important needs to have been m_copy'ed in
5983 /* take care of ecn */
5984 if ((data_processed == 1) &&
5985 (stcb->asoc.ecn_supported == 1) &&
5986 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5987 /* Yep, we need to add a ECNE */
5988 sctp_send_ecn_echo(stcb, net, high_tsn);
5990 if ((data_processed == 0) && (fwd_tsn_seen)) {
5992 uint32_t highest_tsn;
5994 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5995 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5997 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5999 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
6000 stcb->asoc.send_sack = 1;
6001 sctp_sack_check(stcb, was_a_gap);
6002 } else if (fwd_tsn_seen) {
6003 stcb->asoc.send_sack = 1;
6005 /* trigger send of any chunks in queue... */
6007 #ifdef SCTP_AUDITING_ENABLED
6008 sctp_audit_log(0xE0, 2);
6009 sctp_auditing(1, inp, stcb, net);
6011 SCTPDBG(SCTP_DEBUG_INPUT1,
6012 "Check for chunk output prw:%d tqe:%d tf=%d\n",
6013 stcb->asoc.peers_rwnd,
6014 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
6015 stcb->asoc.total_flight);
6016 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
6017 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
6018 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
6020 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
6022 stcb->asoc.trigger_reset ||
6024 (stcb->asoc.peers_rwnd > 0 ||
6025 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
6026 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
6027 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
6028 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
6030 #ifdef SCTP_AUDITING_ENABLED
6031 sctp_audit_log(0xE0, 3);
6032 sctp_auditing(2, inp, stcb, net);
6036 SCTP_TCB_UNLOCK(stcb);
6038 if (inp_decr != NULL) {
6039 /* reduce ref-count */
6040 SCTP_INP_WLOCK(inp_decr);
6041 SCTP_INP_DECR_REF(inp_decr);
6042 SCTP_INP_WUNLOCK(inp_decr);
6049 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
6053 uint32_t vrf_id = 0;
6055 struct sockaddr_in src, dst;
6058 struct sctp_chunkhdr *ch;
6060 #if !defined(SCTP_WITH_NO_CSUM)
6061 uint8_t compute_crc;
6068 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
6069 SCTP_RELEASE_PKT(i_pak);
6072 m = SCTP_HEADER_TO_CHAIN(i_pak);
6073 #ifdef SCTP_MBUF_LOGGING
6074 /* Log in any input mbufs */
6075 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6076 sctp_log_mbc(m, SCTP_MBUF_INPUT);
6079 #ifdef SCTP_PACKET_LOGGING
6080 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
6084 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
6085 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
6087 if_name(m->m_pkthdr.rcvif),
6088 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
6089 mflowid = m->m_pkthdr.flowid;
6090 mflowtype = M_HASHTYPE_GET(m);
6091 fibnum = M_GETFIB(m);
6092 SCTP_STAT_INCR(sctps_recvpackets);
6093 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
6094 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
6095 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
6096 if (SCTP_BUF_LEN(m) < offset) {
6097 if ((m = m_pullup(m, offset)) == NULL) {
6098 SCTP_STAT_INCR(sctps_hdrops);
6102 ip = mtod(m, struct ip *);
6103 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
6104 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
6105 offset -= sizeof(struct sctp_chunkhdr);
6106 memset(&src, 0, sizeof(struct sockaddr_in));
6107 src.sin_family = AF_INET;
6108 src.sin_len = sizeof(struct sockaddr_in);
6109 src.sin_port = sh->src_port;
6110 src.sin_addr = ip->ip_src;
6111 memset(&dst, 0, sizeof(struct sockaddr_in));
6112 dst.sin_family = AF_INET;
6113 dst.sin_len = sizeof(struct sockaddr_in);
6114 dst.sin_port = sh->dest_port;
6115 dst.sin_addr = ip->ip_dst;
6116 length = ntohs(ip->ip_len);
6117 /* Validate mbuf chain length with IP payload length. */
6118 if (SCTP_HEADER_LEN(m) != length) {
6119 SCTPDBG(SCTP_DEBUG_INPUT1,
6120 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
6121 SCTP_STAT_INCR(sctps_hdrops);
6124 /* SCTP does not allow broadcasts or multicasts */
6125 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
6128 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
6131 ecn_bits = ip->ip_tos;
6132 #if defined(SCTP_WITH_NO_CSUM)
6133 SCTP_STAT_INCR(sctps_recvnocrc);
6135 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
6136 SCTP_STAT_INCR(sctps_recvhwcrc);
6139 SCTP_STAT_INCR(sctps_recvswcrc);
6143 sctp_common_input_processing(&m, iphlen, offset, length,
6144 (struct sockaddr *)&src,
6145 (struct sockaddr *)&dst,
6147 #if !defined(SCTP_WITH_NO_CSUM)
6151 mflowtype, mflowid, fibnum,
6160 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6161 extern int *sctp_cpuarry;
6165 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
6172 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6178 uint32_t flowid, tag;
6180 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
6181 flowid = m->m_pkthdr.flowid;
6184 * No flow id built by lower layers fix it so we
6187 offset = off + sizeof(struct sctphdr);
6188 if (SCTP_BUF_LEN(m) < offset) {
6189 if ((m = m_pullup(m, offset)) == NULL) {
6190 SCTP_STAT_INCR(sctps_hdrops);
6191 return (IPPROTO_DONE);
6194 ip = mtod(m, struct ip *);
6195 sh = (struct sctphdr *)((caddr_t)ip + off);
6196 tag = htonl(sh->v_tag);
6197 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6198 m->m_pkthdr.flowid = flowid;
6199 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
6201 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6202 sctp_queue_to_mcore(m, off, cpu_to_use);
6203 return (IPPROTO_DONE);
6206 sctp_input_with_port(m, off, 0);
6207 return (IPPROTO_DONE);