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) == 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,
206 SCTP_INP_RUNLOCK(inp);
211 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
215 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
216 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
223 struct sctp_stream_queue_pending *sp;
224 struct sctp_association *asoc;
227 * This function returns if any stream has true unsent data on it.
228 * Note that as it looks through it will clean up any places that
229 * have old data that has been sent but left at top of stream queue.
233 SCTP_TCB_SEND_LOCK(stcb);
234 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
235 /* Check to see if some data queued */
236 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
237 /* sa_ignore FREED_MEMORY */
238 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
242 if ((sp->msg_is_complete) &&
244 (sp->sender_all_done)) {
246 * We are doing differed cleanup. Last time
247 * through when we took all the data the
248 * sender_all_done was not set.
250 if (sp->put_last_out == 0) {
251 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
252 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
258 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
259 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
260 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp, 1);
262 sctp_free_remote_addr(sp->net);
266 sctp_m_freem(sp->data);
269 sctp_free_a_strmoq(stcb, sp, so_locked);
270 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
276 if (unsent_data > 0) {
281 SCTP_TCB_SEND_UNLOCK(stcb);
282 return (unsent_data);
286 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
288 struct sctp_init *init;
289 struct sctp_association *asoc;
290 struct sctp_nets *lnet;
295 /* save off parameters */
296 asoc->peer_vtag = ntohl(init->initiate_tag);
297 asoc->peers_rwnd = ntohl(init->a_rwnd);
299 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
301 if (!TAILQ_EMPTY(&asoc->nets)) {
302 /* update any ssthresh's that may have a default */
303 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
304 lnet->ssthresh = asoc->peers_rwnd;
305 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
306 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);
496 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
497 stcb->asoc.local_hmacs);
499 sctp_queue_op_err(stcb, op_err);
500 /* queuing will steal away the mbuf chain to the out queue */
503 /* extract the cookie and queue it to "echo" it back... */
504 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
505 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
506 stcb->asoc.overall_error_count,
508 SCTP_FROM_SCTP_INPUT,
511 stcb->asoc.overall_error_count = 0;
512 net->error_count = 0;
515 * Cancel the INIT timer, We do this first before queueing the
516 * cookie. We always cancel at the primary to assue that we are
517 * canceling the timer started by the INIT which always goes to the
520 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
521 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
523 /* calculate the RTO */
524 net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
525 SCTP_RTT_FROM_NON_DATA);
526 retval = sctp_send_cookie_echo(m, offset, stcb, net);
529 * No cookie, we probably should send a op error. But in any
530 * case if there is no cookie in the INIT-ACK, we can
531 * abandon the peer, its broke.
536 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
537 /* We abort with an error of missing mandatory param */
538 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
539 if (op_err != NULL) {
540 struct sctp_error_missing_param *cause;
542 SCTP_BUF_LEN(op_err) = len;
543 cause = mtod(op_err, struct sctp_error_missing_param *);
544 /* Subtract the reserved param */
545 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
546 cause->cause.length = htons(len);
547 cause->num_missing_params = htonl(1);
548 cause->type[0] = htons(SCTP_STATE_COOKIE);
550 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
551 src, dst, sh, op_err,
554 *abort_no_unlock = 1;
563 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
564 struct sctp_tcb *stcb, struct sctp_nets *net)
566 union sctp_sockstore store;
567 struct sctp_nets *r_net, *f_net;
570 uint16_t old_error_counter;
572 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
577 memset(&store, 0, sizeof(store));
578 switch (cp->heartbeat.hb_info.addr_family) {
581 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
582 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
583 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
584 store.sin.sin_port = stcb->rport;
585 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
586 sizeof(store.sin.sin_addr));
594 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
595 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
596 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
597 store.sin6.sin6_port = stcb->rport;
598 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
607 r_net = sctp_findnet(stcb, &store.sa);
609 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
612 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
613 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
614 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
616 * If the its a HB and it's random value is correct when can
617 * confirm the destination.
619 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
620 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
621 stcb->asoc.primary_destination = r_net;
622 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
623 f_net = TAILQ_FIRST(&stcb->asoc.nets);
624 if (f_net != r_net) {
626 * first one on the list is NOT the primary
627 * sctp_cmpaddr() is much more efficient if
628 * the primary is the first on the list,
631 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
632 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
636 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
637 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
638 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
639 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
640 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
642 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
643 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
644 stcb->asoc.overall_error_count,
646 SCTP_FROM_SCTP_INPUT,
649 stcb->asoc.overall_error_count = 0;
650 old_error_counter = r_net->error_count;
651 r_net->error_count = 0;
652 r_net->hb_responded = 1;
653 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
654 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
655 /* Now lets do a RTO with this */
656 r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
657 SCTP_RTT_FROM_NON_DATA);
658 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
659 r_net->dest_state |= SCTP_ADDR_REACHABLE;
660 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
661 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
663 if (r_net->dest_state & SCTP_ADDR_PF) {
664 r_net->dest_state &= ~SCTP_ADDR_PF;
665 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
667 if (old_error_counter > 0) {
668 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
669 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
670 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
672 if (r_net == stcb->asoc.primary_destination) {
673 if (stcb->asoc.alternate) {
674 /* release the alternate, primary is good */
675 sctp_free_remote_addr(stcb->asoc.alternate);
676 stcb->asoc.alternate = NULL;
679 /* Mobility adaptation */
681 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
682 SCTP_MOBILITY_BASE) ||
683 sctp_is_mobility_feature_on(stcb->sctp_ep,
684 SCTP_MOBILITY_FASTHANDOFF)) &&
685 sctp_is_mobility_feature_on(stcb->sctp_ep,
686 SCTP_MOBILITY_PRIM_DELETED)) {
688 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
689 stcb->sctp_ep, stcb, NULL,
690 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
691 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
692 SCTP_MOBILITY_FASTHANDOFF)) {
693 sctp_assoc_immediate_retrans(stcb,
694 stcb->asoc.primary_destination);
696 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
697 SCTP_MOBILITY_BASE)) {
698 sctp_move_chunks_from_net(stcb,
699 stcb->asoc.deleted_primary);
701 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
702 stcb->asoc.deleted_primary);
708 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
711 * return 0 means we want you to proceed with the abort non-zero
712 * means no abort processing
714 struct sctpasochead *head;
716 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
717 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
718 atomic_add_int(&stcb->asoc.refcnt, 1);
719 SCTP_TCB_UNLOCK(stcb);
720 SCTP_INP_INFO_WLOCK();
722 atomic_subtract_int(&stcb->asoc.refcnt, 1);
724 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
725 /* generate a new vtag and send init */
726 LIST_REMOVE(stcb, sctp_asocs);
727 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
728 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
730 * put it in the bucket in the vtag hash of assoc's for the
733 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
734 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
735 SCTP_INP_INFO_WUNLOCK();
738 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
740 * treat like a case where the cookie expired i.e.: - dump
741 * current cookie. - generate a new vtag. - resend init.
743 /* generate a new vtag and send init */
744 LIST_REMOVE(stcb, sctp_asocs);
745 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
746 sctp_stop_all_cookie_timers(stcb);
747 sctp_toss_old_cookies(stcb, &stcb->asoc);
748 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
749 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
751 * put it in the bucket in the vtag hash of assoc's for the
754 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
755 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
756 SCTP_INP_INFO_WUNLOCK();
763 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
764 struct sctp_nets *net)
767 * return 0 means we want you to proceed with the abort non-zero
768 * means no abort processing
770 if (stcb->asoc.auth_supported == 0) {
771 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
774 sctp_asconf_send_nat_state_update(stcb, net);
779 /* Returns 1 if the stcb was aborted, 0 otherwise */
781 sctp_handle_abort(struct sctp_abort_chunk *abort,
782 struct sctp_tcb *stcb, struct sctp_nets *net)
784 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
790 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
794 len = ntohs(abort->ch.chunk_length);
795 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
797 * Need to check the cause codes for our two magic nat
798 * aborts which don't kill the assoc necessarily.
800 struct sctp_error_cause *cause;
802 cause = (struct sctp_error_cause *)(abort + 1);
803 error = ntohs(cause->code);
804 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
805 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
806 abort->ch.chunk_flags);
807 if (sctp_handle_nat_colliding_state(stcb)) {
810 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
811 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
812 abort->ch.chunk_flags);
813 if (sctp_handle_nat_missing_state(stcb, net)) {
820 /* stop any receive timers */
821 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net,
822 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
823 /* notify user of the abort and clean up... */
824 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
826 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
827 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
828 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
829 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
831 #ifdef SCTP_ASOCLOG_OF_TSNS
832 sctp_print_out_track_log(stcb);
834 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
835 so = SCTP_INP_SO(stcb->sctp_ep);
836 atomic_add_int(&stcb->asoc.refcnt, 1);
837 SCTP_TCB_UNLOCK(stcb);
838 SCTP_SOCKET_LOCK(so, 1);
840 atomic_subtract_int(&stcb->asoc.refcnt, 1);
842 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
843 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
844 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
845 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
846 SCTP_SOCKET_UNLOCK(so, 1);
848 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
853 sctp_start_net_timers(struct sctp_tcb *stcb)
855 uint32_t cnt_hb_sent;
856 struct sctp_nets *net;
859 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
861 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
862 * If the dest in unconfirmed send a hb as well if under
863 * max_hb_burst have been sent.
865 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
866 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
867 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
868 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
869 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
874 sctp_chunk_output(stcb->sctp_ep, stcb,
875 SCTP_OUTPUT_FROM_COOKIE_ACK,
882 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
883 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
885 struct sctp_association *asoc;
886 int some_on_streamwheel;
888 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
892 SCTPDBG(SCTP_DEBUG_INPUT2,
893 "sctp_handle_shutdown: handling SHUTDOWN\n");
897 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
898 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
901 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
902 /* Shutdown NOT the expected size */
905 old_state = SCTP_GET_STATE(stcb);
906 sctp_update_acked(stcb, cp, abort_flag);
910 if (asoc->control_pdapi) {
912 * With a normal shutdown we assume the end of last record.
914 SCTP_INP_READ_LOCK(stcb->sctp_ep);
915 if (asoc->control_pdapi->on_strm_q) {
916 struct sctp_stream_in *strm;
918 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
919 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
921 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
922 asoc->control_pdapi->on_strm_q = 0;
923 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
925 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
926 asoc->control_pdapi->on_strm_q = 0;
929 panic("Unknown state on ctrl:%p on_strm_q:%d",
931 asoc->control_pdapi->on_strm_q);
935 asoc->control_pdapi->end_added = 1;
936 asoc->control_pdapi->pdapi_aborted = 1;
937 asoc->control_pdapi = NULL;
938 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
939 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
940 so = SCTP_INP_SO(stcb->sctp_ep);
941 atomic_add_int(&stcb->asoc.refcnt, 1);
942 SCTP_TCB_UNLOCK(stcb);
943 SCTP_SOCKET_LOCK(so, 1);
945 atomic_subtract_int(&stcb->asoc.refcnt, 1);
946 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
947 /* assoc was freed while we were unlocked */
948 SCTP_SOCKET_UNLOCK(so, 1);
952 if (stcb->sctp_socket) {
953 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
955 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
956 SCTP_SOCKET_UNLOCK(so, 1);
959 /* goto SHUTDOWN_RECEIVED state to block new requests */
960 if (stcb->sctp_socket) {
961 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
962 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
963 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
964 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
965 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
967 * notify upper layer that peer has initiated a
970 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
973 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
976 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
978 * stop the shutdown timer, since we WILL move to
981 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
982 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
984 /* Now is there unsent data on a stream somewhere? */
985 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
987 if (!TAILQ_EMPTY(&asoc->send_queue) ||
988 !TAILQ_EMPTY(&asoc->sent_queue) ||
989 some_on_streamwheel) {
990 /* By returning we will push more data out */
993 /* no outstanding data to send, so move on... */
994 /* send SHUTDOWN-ACK */
995 /* move to SHUTDOWN-ACK-SENT state */
996 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
997 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
998 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1000 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
1001 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
1002 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
1003 sctp_stop_timers_for_shutdown(stcb);
1004 sctp_send_shutdown_ack(stcb, net);
1005 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
1006 stcb->sctp_ep, stcb, net);
1007 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1008 sctp_send_shutdown_ack(stcb, net);
1014 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
1015 struct sctp_tcb *stcb,
1016 struct sctp_nets *net)
1018 struct sctp_association *asoc;
1019 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1022 so = SCTP_INP_SO(stcb->sctp_ep);
1024 SCTPDBG(SCTP_DEBUG_INPUT2,
1025 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
1030 /* process according to association state */
1031 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1032 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1033 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
1034 sctp_send_shutdown_complete(stcb, net, 1);
1035 SCTP_TCB_UNLOCK(stcb);
1038 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
1039 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
1040 /* unexpected SHUTDOWN-ACK... so ignore... */
1041 SCTP_TCB_UNLOCK(stcb);
1044 if (asoc->control_pdapi) {
1046 * With a normal shutdown we assume the end of last record.
1048 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1049 asoc->control_pdapi->end_added = 1;
1050 asoc->control_pdapi->pdapi_aborted = 1;
1051 asoc->control_pdapi = NULL;
1052 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1053 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1054 atomic_add_int(&stcb->asoc.refcnt, 1);
1055 SCTP_TCB_UNLOCK(stcb);
1056 SCTP_SOCKET_LOCK(so, 1);
1057 SCTP_TCB_LOCK(stcb);
1058 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1059 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1060 /* assoc was freed while we were unlocked */
1061 SCTP_SOCKET_UNLOCK(so, 1);
1065 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1066 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1067 SCTP_SOCKET_UNLOCK(so, 1);
1071 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1072 !TAILQ_EMPTY(&asoc->sent_queue) ||
1073 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
1074 panic("Queues are not empty when handling SHUTDOWN-ACK");
1077 /* stop the timer */
1078 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
1079 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1080 /* send SHUTDOWN-COMPLETE */
1081 sctp_send_shutdown_complete(stcb, net, 0);
1082 /* notify upper layer protocol */
1083 if (stcb->sctp_socket) {
1084 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1085 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1086 stcb->sctp_socket->so_snd.sb_cc = 0;
1088 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1090 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1091 /* free the TCB but first save off the ep */
1092 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1093 atomic_add_int(&stcb->asoc.refcnt, 1);
1094 SCTP_TCB_UNLOCK(stcb);
1095 SCTP_SOCKET_LOCK(so, 1);
1096 SCTP_TCB_LOCK(stcb);
1097 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1099 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1100 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1101 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1102 SCTP_SOCKET_UNLOCK(so, 1);
1107 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type,
1108 struct sctp_nets *net)
1110 switch (chunk_type) {
1111 case SCTP_ASCONF_ACK:
1113 sctp_asconf_cleanup(stcb, net);
1115 case SCTP_IFORWARD_CUM_TSN:
1116 case SCTP_FORWARD_CUM_TSN:
1117 stcb->asoc.prsctp_supported = 0;
1120 SCTPDBG(SCTP_DEBUG_INPUT2,
1121 "Peer does not support chunk type %d (0x%x).\n",
1122 chunk_type, chunk_type);
1128 * Skip past the param header and then we will find the param that caused the
1129 * problem. There are a number of param's in a ASCONF OR the prsctp param
1130 * these will turn of specific features.
1131 * XXX: Is this the right thing to do?
1134 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1136 switch (parameter_type) {
1138 case SCTP_PRSCTP_SUPPORTED:
1139 stcb->asoc.prsctp_supported = 0;
1141 case SCTP_SUPPORTED_CHUNK_EXT:
1143 /* draft-ietf-tsvwg-addip-sctp */
1144 case SCTP_HAS_NAT_SUPPORT:
1145 stcb->asoc.peer_supports_nat = 0;
1147 case SCTP_ADD_IP_ADDRESS:
1148 case SCTP_DEL_IP_ADDRESS:
1149 case SCTP_SET_PRIM_ADDR:
1150 stcb->asoc.asconf_supported = 0;
1152 case SCTP_SUCCESS_REPORT:
1153 case SCTP_ERROR_CAUSE_IND:
1154 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1155 SCTPDBG(SCTP_DEBUG_INPUT2,
1156 "Turning off ASCONF to this strange peer\n");
1157 stcb->asoc.asconf_supported = 0;
1160 SCTPDBG(SCTP_DEBUG_INPUT2,
1161 "Peer does not support param type %d (0x%x)??\n",
1162 parameter_type, parameter_type);
1168 sctp_handle_error(struct sctp_chunkhdr *ch,
1169 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1171 struct sctp_error_cause *cause;
1172 struct sctp_association *asoc;
1173 uint32_t remaining_length, adjust;
1174 uint16_t code, cause_code, cause_length;
1175 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1179 /* parse through all of the errors and process */
1181 cause = (struct sctp_error_cause *)((caddr_t)ch +
1182 sizeof(struct sctp_chunkhdr));
1183 remaining_length = ntohs(ch->chunk_length);
1184 if (remaining_length > limit) {
1185 remaining_length = limit;
1187 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1188 remaining_length -= sizeof(struct sctp_chunkhdr);
1190 remaining_length = 0;
1193 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1194 /* Process an Error Cause */
1195 cause_code = ntohs(cause->code);
1196 cause_length = ntohs(cause->length);
1197 if ((cause_length > remaining_length) || (cause_length == 0)) {
1198 /* Invalid cause length, possibly due to truncation. */
1199 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1200 remaining_length, cause_length);
1204 /* report the first error cause */
1207 switch (cause_code) {
1208 case SCTP_CAUSE_INVALID_STREAM:
1209 case SCTP_CAUSE_MISSING_PARAM:
1210 case SCTP_CAUSE_INVALID_PARAM:
1211 case SCTP_CAUSE_NO_USER_DATA:
1212 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1215 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1216 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags: %x\n",
1218 if (sctp_handle_nat_colliding_state(stcb)) {
1222 case SCTP_CAUSE_NAT_MISSING_STATE:
1223 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags: %x\n",
1225 if (sctp_handle_nat_missing_state(stcb, net)) {
1229 case SCTP_CAUSE_STALE_COOKIE:
1231 * We only act if we have echoed a cookie and are
1234 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1235 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1236 struct sctp_error_stale_cookie *stale_cookie;
1238 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1239 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time);
1240 /* Double it to be more robust on RTX */
1241 if (asoc->cookie_preserve_req <= UINT32_MAX / 2) {
1242 asoc->cookie_preserve_req *= 2;
1244 asoc->cookie_preserve_req = UINT32_MAX;
1246 asoc->stale_cookie_count++;
1247 if (asoc->stale_cookie_count >
1248 asoc->max_init_times) {
1249 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1250 /* now free the asoc */
1251 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1252 so = SCTP_INP_SO(stcb->sctp_ep);
1253 atomic_add_int(&stcb->asoc.refcnt, 1);
1254 SCTP_TCB_UNLOCK(stcb);
1255 SCTP_SOCKET_LOCK(so, 1);
1256 SCTP_TCB_LOCK(stcb);
1257 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1259 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1260 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1261 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1262 SCTP_SOCKET_UNLOCK(so, 1);
1266 /* blast back to INIT state */
1267 sctp_toss_old_cookies(stcb, &stcb->asoc);
1268 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1269 sctp_stop_all_cookie_timers(stcb);
1270 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1273 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1275 * Nothing we can do here, we don't do hostname
1276 * addresses so if the peer does not like my IPv6
1277 * (or IPv4 for that matter) it does not matter. If
1278 * they don't support that type of address, they can
1279 * NOT possibly get that packet type... i.e. with no
1280 * IPv6 you can't receive a IPv6 packet. so we can
1281 * safely ignore this one. If we ever added support
1282 * for HOSTNAME Addresses, then we would need to do
1286 case SCTP_CAUSE_UNRECOG_CHUNK:
1287 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1288 struct sctp_error_unrecognized_chunk *unrec_chunk;
1290 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1291 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type, net);
1294 case SCTP_CAUSE_UNRECOG_PARAM:
1295 /* XXX: We only consider the first parameter */
1296 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1297 struct sctp_paramhdr *unrec_parameter;
1299 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1300 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1303 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1305 * We ignore this since the timer will drive out a
1306 * new cookie anyway and there timer will drive us
1307 * to send a SHUTDOWN_COMPLETE. We can't send one
1308 * here since we don't have their tag.
1311 case SCTP_CAUSE_DELETING_LAST_ADDR:
1312 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1313 case SCTP_CAUSE_DELETING_SRC_ADDR:
1315 * We should NOT get these here, but in a
1318 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1321 case SCTP_CAUSE_OUT_OF_RESC:
1323 * And what, pray tell do we do with the fact that
1324 * the peer is out of resources? Not really sure we
1325 * could do anything but abort. I suspect this
1326 * should have came WITH an abort instead of in a
1331 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1335 adjust = SCTP_SIZE32(cause_length);
1336 if (remaining_length >= adjust) {
1337 remaining_length -= adjust;
1339 remaining_length = 0;
1341 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1343 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1348 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1349 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1350 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1351 struct sctp_nets *net, int *abort_no_unlock,
1352 uint8_t mflowtype, uint32_t mflowid,
1355 struct sctp_init_ack *init_ack;
1356 struct mbuf *op_err;
1358 SCTPDBG(SCTP_DEBUG_INPUT2,
1359 "sctp_handle_init_ack: handling INIT-ACK\n");
1362 SCTPDBG(SCTP_DEBUG_INPUT2,
1363 "sctp_handle_init_ack: TCB is null\n");
1366 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1367 /* Invalid length */
1368 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1369 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1370 src, dst, sh, op_err,
1373 *abort_no_unlock = 1;
1376 init_ack = &cp->init;
1377 /* validate parameters */
1378 if (init_ack->initiate_tag == 0) {
1379 /* protocol error... send an abort */
1380 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1381 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1382 src, dst, sh, op_err,
1385 *abort_no_unlock = 1;
1388 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1389 /* protocol error... send an abort */
1390 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1391 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1392 src, dst, sh, op_err,
1395 *abort_no_unlock = 1;
1398 if (init_ack->num_inbound_streams == 0) {
1399 /* protocol error... send an abort */
1400 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1401 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1402 src, dst, sh, op_err,
1405 *abort_no_unlock = 1;
1408 if (init_ack->num_outbound_streams == 0) {
1409 /* protocol error... send an abort */
1410 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1411 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1412 src, dst, sh, op_err,
1415 *abort_no_unlock = 1;
1418 /* process according to association state... */
1419 switch (SCTP_GET_STATE(stcb)) {
1420 case SCTP_STATE_COOKIE_WAIT:
1421 /* this is the expected state for this chunk */
1422 /* process the INIT-ACK parameters */
1423 if (stcb->asoc.primary_destination->dest_state &
1424 SCTP_ADDR_UNCONFIRMED) {
1426 * The primary is where we sent the INIT, we can
1427 * always consider it confirmed when the INIT-ACK is
1428 * returned. Do this before we load addresses
1431 stcb->asoc.primary_destination->dest_state &=
1432 ~SCTP_ADDR_UNCONFIRMED;
1433 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1434 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1436 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1437 net, abort_no_unlock,
1440 /* error in parsing parameters */
1443 /* update our state */
1444 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1445 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1447 /* reset the RTO calc */
1448 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1449 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1450 stcb->asoc.overall_error_count,
1452 SCTP_FROM_SCTP_INPUT,
1455 stcb->asoc.overall_error_count = 0;
1456 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1458 * collapse the init timer back in case of a exponential
1461 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1464 * the send at the end of the inbound data processing will
1465 * cause the cookie to be sent
1468 case SCTP_STATE_SHUTDOWN_SENT:
1469 /* incorrect state... discard */
1471 case SCTP_STATE_COOKIE_ECHOED:
1472 /* incorrect state... discard */
1474 case SCTP_STATE_OPEN:
1475 /* incorrect state... discard */
1477 case SCTP_STATE_EMPTY:
1478 case SCTP_STATE_INUSE:
1480 /* incorrect state... discard */
1484 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1488 static struct sctp_tcb *
1489 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1490 struct sockaddr *src, struct sockaddr *dst,
1491 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1492 struct sctp_inpcb *inp, struct sctp_nets **netp,
1493 struct sockaddr *init_src, int *notification,
1494 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1495 uint8_t mflowtype, uint32_t mflowid,
1496 uint32_t vrf_id, uint16_t port);
1500 * handle a state cookie for an existing association m: input packet mbuf
1501 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1502 * "split" mbuf and the cookie signature does not exist offset: offset into
1503 * mbuf to the cookie-echo chunk
1505 static struct sctp_tcb *
1506 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1507 struct sockaddr *src, struct sockaddr *dst,
1508 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1509 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1510 struct sockaddr *init_src, int *notification,
1511 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1512 uint8_t mflowtype, uint32_t mflowid,
1513 uint32_t vrf_id, uint16_t port)
1515 struct sctp_association *asoc;
1516 struct sctp_init_chunk *init_cp, init_buf;
1517 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1518 struct sctp_nets *net;
1519 struct mbuf *op_err;
1521 int init_offset, initack_offset, i;
1525 #if defined(SCTP_DETAILED_STR_STATS)
1530 /* I know that the TCB is non-NULL from the caller */
1532 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1533 if (asoc->cookie_how[how_indx] == 0)
1536 if (how_indx < sizeof(asoc->cookie_how)) {
1537 asoc->cookie_how[how_indx] = 1;
1539 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1540 /* SHUTDOWN came in after sending INIT-ACK */
1541 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1542 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1543 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1544 mflowtype, mflowid, inp->fibnum,
1546 if (how_indx < sizeof(asoc->cookie_how))
1547 asoc->cookie_how[how_indx] = 2;
1551 * find and validate the INIT chunk in the cookie (peer's info) the
1552 * INIT should start after the cookie-echo header struct (chunk
1553 * header, state cookie header struct)
1555 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1557 init_cp = (struct sctp_init_chunk *)
1558 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1559 (uint8_t *)&init_buf);
1560 if (init_cp == NULL) {
1561 /* could not pull a INIT chunk in cookie */
1564 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1568 * find and validate the INIT-ACK chunk in the cookie (my info) the
1569 * INIT-ACK follows the INIT chunk
1571 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1572 initack_cp = (struct sctp_init_ack_chunk *)
1573 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1574 (uint8_t *)&initack_buf);
1575 if (initack_cp == NULL) {
1576 /* could not pull INIT-ACK chunk in cookie */
1579 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1582 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1583 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1585 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1586 * to get into the OPEN state
1588 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1590 * Opps, this means that we somehow generated two vtag's
1591 * the same. I.e. we did:
1593 * <---INIT(tag=a)------
1594 * ----INIT-ACK(tag=t)-->
1595 * ----INIT(tag=t)------> *1
1596 * <---INIT-ACK(tag=a)---
1597 * <----CE(tag=t)------------- *2
1599 * At point *1 we should be generating a different
1600 * tag t'. Which means we would throw away the CE and send
1601 * ours instead. Basically this is case C (throw away side).
1603 if (how_indx < sizeof(asoc->cookie_how))
1604 asoc->cookie_how[how_indx] = 17;
1608 switch (SCTP_GET_STATE(stcb)) {
1609 case SCTP_STATE_COOKIE_WAIT:
1610 case SCTP_STATE_COOKIE_ECHOED:
1612 * INIT was sent but got a COOKIE_ECHO with the
1613 * correct tags... just accept it...but we must
1614 * process the init so that we can make sure we have
1615 * the right seq no's.
1617 /* First we must process the INIT !! */
1618 retval = sctp_process_init(init_cp, stcb);
1620 if (how_indx < sizeof(asoc->cookie_how))
1621 asoc->cookie_how[how_indx] = 3;
1624 /* we have already processed the INIT so no problem */
1625 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1627 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1628 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1630 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1631 /* update current state */
1632 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1633 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1635 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1637 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1638 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1639 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1640 stcb->sctp_ep, stcb, asoc->primary_destination);
1642 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1643 sctp_stop_all_cookie_timers(stcb);
1644 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1645 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1646 (inp->sctp_socket->so_qlimit == 0)
1648 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1652 * Here is where collision would go if we
1653 * did a connect() and instead got a
1654 * init/init-ack/cookie done before the
1655 * init-ack came back..
1657 stcb->sctp_ep->sctp_flags |=
1658 SCTP_PCB_FLAGS_CONNECTED;
1659 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1660 so = SCTP_INP_SO(stcb->sctp_ep);
1661 atomic_add_int(&stcb->asoc.refcnt, 1);
1662 SCTP_TCB_UNLOCK(stcb);
1663 SCTP_SOCKET_LOCK(so, 1);
1664 SCTP_TCB_LOCK(stcb);
1665 atomic_add_int(&stcb->asoc.refcnt, -1);
1666 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1667 SCTP_SOCKET_UNLOCK(so, 1);
1671 soisconnected(stcb->sctp_socket);
1672 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1673 SCTP_SOCKET_UNLOCK(so, 1);
1676 /* notify upper layer */
1677 *notification = SCTP_NOTIFY_ASSOC_UP;
1679 * since we did not send a HB make sure we don't
1682 old.tv_sec = cookie->time_entered.tv_sec;
1683 old.tv_usec = cookie->time_entered.tv_usec;
1684 net->hb_responded = 1;
1685 net->RTO = sctp_calculate_rto(stcb, asoc, net,
1687 SCTP_RTT_FROM_NON_DATA);
1689 if (stcb->asoc.sctp_autoclose_ticks &&
1690 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1691 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1697 * we're in the OPEN state (or beyond), so peer must
1698 * have simply lost the COOKIE-ACK
1702 sctp_stop_all_cookie_timers(stcb);
1704 * We ignore the return code here.. not sure if we should
1705 * somehow abort.. but we do have an existing asoc. This
1706 * really should not fail.
1708 if (sctp_load_addresses_from_init(stcb, m,
1709 init_offset + sizeof(struct sctp_init_chunk),
1710 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1711 if (how_indx < sizeof(asoc->cookie_how))
1712 asoc->cookie_how[how_indx] = 4;
1715 /* respond with a COOKIE-ACK */
1716 sctp_toss_old_cookies(stcb, asoc);
1717 sctp_send_cookie_ack(stcb);
1718 if (how_indx < sizeof(asoc->cookie_how))
1719 asoc->cookie_how[how_indx] = 5;
1723 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1724 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1725 cookie->tie_tag_my_vtag == 0 &&
1726 cookie->tie_tag_peer_vtag == 0) {
1728 * case C in Section 5.2.4 Table 2: XMOO silently discard
1730 if (how_indx < sizeof(asoc->cookie_how))
1731 asoc->cookie_how[how_indx] = 6;
1735 * If nat support, and the below and stcb is established, send back
1736 * a ABORT(colliding state) if we are established.
1738 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1739 (asoc->peer_supports_nat) &&
1740 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1741 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1742 (asoc->peer_vtag == 0)))) {
1744 * Special case - Peer's support nat. We may have two init's
1745 * that we gave out the same tag on since one was not
1746 * established.. i.e. we get INIT from host-1 behind the nat
1747 * and we respond tag-a, we get a INIT from host-2 behind
1748 * the nat and we get tag-a again. Then we bring up host-1
1749 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1750 * Now we have colliding state. We must send an abort here
1751 * with colliding state indication.
1753 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1754 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1755 mflowtype, mflowid, inp->fibnum,
1759 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1760 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1761 (asoc->peer_vtag == 0))) {
1763 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1764 * should be ok, re-accept peer info
1766 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1768 * Extension of case C. If we hit this, then the
1769 * random number generator returned the same vtag
1770 * when we first sent our INIT-ACK and when we later
1771 * sent our INIT. The side with the seq numbers that
1772 * are different will be the one that normnally
1773 * would have hit case C. This in effect "extends"
1774 * our vtags in this collision case to be 64 bits.
1775 * The same collision could occur aka you get both
1776 * vtag and seq number the same twice in a row.. but
1777 * is much less likely. If it did happen then we
1778 * would proceed through and bring up the assoc.. we
1779 * may end up with the wrong stream setup however..
1780 * which would be bad.. but there is no way to
1781 * tell.. until we send on a stream that does not
1784 if (how_indx < sizeof(asoc->cookie_how))
1785 asoc->cookie_how[how_indx] = 7;
1789 if (how_indx < sizeof(asoc->cookie_how))
1790 asoc->cookie_how[how_indx] = 8;
1791 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1792 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1793 sctp_stop_all_cookie_timers(stcb);
1795 * since we did not send a HB make sure we don't double
1798 net->hb_responded = 1;
1799 if (stcb->asoc.sctp_autoclose_ticks &&
1800 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1801 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1804 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1805 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1807 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1809 * Ok the peer probably discarded our data (if we
1810 * echoed a cookie+data). So anything on the
1811 * sent_queue should be marked for retransmit, we
1812 * may not get something to kick us so it COULD
1813 * still take a timeout to move these.. but it can't
1814 * hurt to mark them.
1816 struct sctp_tmit_chunk *chk;
1818 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1819 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1820 chk->sent = SCTP_DATAGRAM_RESEND;
1821 sctp_flight_size_decrease(chk);
1822 sctp_total_flight_decrease(stcb, chk);
1823 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1829 /* process the INIT info (peer's info) */
1830 retval = sctp_process_init(init_cp, stcb);
1832 if (how_indx < sizeof(asoc->cookie_how))
1833 asoc->cookie_how[how_indx] = 9;
1836 if (sctp_load_addresses_from_init(stcb, m,
1837 init_offset + sizeof(struct sctp_init_chunk),
1838 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1839 if (how_indx < sizeof(asoc->cookie_how))
1840 asoc->cookie_how[how_indx] = 10;
1843 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1844 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1845 *notification = SCTP_NOTIFY_ASSOC_UP;
1847 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1848 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1849 (inp->sctp_socket->so_qlimit == 0)) {
1850 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1853 stcb->sctp_ep->sctp_flags |=
1854 SCTP_PCB_FLAGS_CONNECTED;
1855 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1856 so = SCTP_INP_SO(stcb->sctp_ep);
1857 atomic_add_int(&stcb->asoc.refcnt, 1);
1858 SCTP_TCB_UNLOCK(stcb);
1859 SCTP_SOCKET_LOCK(so, 1);
1860 SCTP_TCB_LOCK(stcb);
1861 atomic_add_int(&stcb->asoc.refcnt, -1);
1862 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1863 SCTP_SOCKET_UNLOCK(so, 1);
1867 soisconnected(stcb->sctp_socket);
1868 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1869 SCTP_SOCKET_UNLOCK(so, 1);
1872 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1873 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1875 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1876 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1877 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1878 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1880 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1882 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1883 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1884 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1885 stcb->sctp_ep, stcb, asoc->primary_destination);
1887 sctp_stop_all_cookie_timers(stcb);
1888 sctp_toss_old_cookies(stcb, asoc);
1889 sctp_send_cookie_ack(stcb);
1892 * only if we have retrans set do we do this. What
1893 * this call does is get only the COOKIE-ACK out and
1894 * then when we return the normal call to
1895 * sctp_chunk_output will get the retrans out behind
1898 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1900 if (how_indx < sizeof(asoc->cookie_how))
1901 asoc->cookie_how[how_indx] = 11;
1905 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1906 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1907 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1908 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1909 cookie->tie_tag_peer_vtag != 0) {
1910 struct sctpasochead *head;
1911 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1915 if (asoc->peer_supports_nat) {
1917 * This is a gross gross hack. Just call the
1918 * cookie_new code since we are allowing a duplicate
1919 * association. I hope this works...
1921 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1922 sh, cookie, cookie_len,
1923 inp, netp, init_src, notification,
1924 auth_skipped, auth_offset, auth_len,
1929 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1932 if (how_indx < sizeof(asoc->cookie_how))
1933 asoc->cookie_how[how_indx] = 12;
1934 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
1935 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1936 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1937 SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
1939 /* notify upper layer */
1940 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1941 atomic_add_int(&stcb->asoc.refcnt, 1);
1942 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1943 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1944 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1945 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1947 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1948 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1949 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1950 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1952 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1953 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1954 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1955 stcb->sctp_ep, stcb, asoc->primary_destination);
1957 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1958 /* move to OPEN state, if not in SHUTDOWN_SENT */
1959 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1961 asoc->pre_open_streams =
1962 ntohs(initack_cp->init.num_outbound_streams);
1963 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1964 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1965 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1967 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1969 asoc->str_reset_seq_in = asoc->init_seq_number;
1971 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1972 if (asoc->mapping_array) {
1973 memset(asoc->mapping_array, 0,
1974 asoc->mapping_array_size);
1976 if (asoc->nr_mapping_array) {
1977 memset(asoc->nr_mapping_array, 0,
1978 asoc->mapping_array_size);
1980 SCTP_TCB_UNLOCK(stcb);
1981 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1982 so = SCTP_INP_SO(stcb->sctp_ep);
1983 SCTP_SOCKET_LOCK(so, 1);
1985 SCTP_INP_INFO_WLOCK();
1986 SCTP_INP_WLOCK(stcb->sctp_ep);
1987 SCTP_TCB_LOCK(stcb);
1988 atomic_add_int(&stcb->asoc.refcnt, -1);
1989 /* send up all the data */
1990 SCTP_TCB_SEND_LOCK(stcb);
1992 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1993 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1994 stcb->asoc.strmout[i].chunks_on_queues = 0;
1995 #if defined(SCTP_DETAILED_STR_STATS)
1996 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1997 asoc->strmout[i].abandoned_sent[j] = 0;
1998 asoc->strmout[i].abandoned_unsent[j] = 0;
2001 asoc->strmout[i].abandoned_sent[0] = 0;
2002 asoc->strmout[i].abandoned_unsent[0] = 0;
2004 stcb->asoc.strmout[i].sid = i;
2005 stcb->asoc.strmout[i].next_mid_ordered = 0;
2006 stcb->asoc.strmout[i].next_mid_unordered = 0;
2007 stcb->asoc.strmout[i].last_msg_incomplete = 0;
2009 /* process the INIT-ACK info (my info) */
2010 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2011 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2013 /* pull from vtag hash */
2014 LIST_REMOVE(stcb, sctp_asocs);
2015 /* re-insert to new vtag position */
2016 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
2017 SCTP_BASE_INFO(hashasocmark))];
2019 * put it in the bucket in the vtag hash of assoc's for the
2022 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
2024 SCTP_TCB_SEND_UNLOCK(stcb);
2025 SCTP_INP_WUNLOCK(stcb->sctp_ep);
2026 SCTP_INP_INFO_WUNLOCK();
2027 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2028 SCTP_SOCKET_UNLOCK(so, 1);
2030 asoc->total_flight = 0;
2031 asoc->total_flight_count = 0;
2032 /* process the INIT info (peer's info) */
2033 retval = sctp_process_init(init_cp, stcb);
2035 if (how_indx < sizeof(asoc->cookie_how))
2036 asoc->cookie_how[how_indx] = 13;
2041 * since we did not send a HB make sure we don't double
2044 net->hb_responded = 1;
2046 if (sctp_load_addresses_from_init(stcb, m,
2047 init_offset + sizeof(struct sctp_init_chunk),
2048 initack_offset, src, dst, init_src, stcb->asoc.port)) {
2049 if (how_indx < sizeof(asoc->cookie_how))
2050 asoc->cookie_how[how_indx] = 14;
2054 /* respond with a COOKIE-ACK */
2055 sctp_stop_all_cookie_timers(stcb);
2056 sctp_toss_old_cookies(stcb, asoc);
2057 sctp_send_cookie_ack(stcb);
2058 if (how_indx < sizeof(asoc->cookie_how))
2059 asoc->cookie_how[how_indx] = 15;
2063 if (how_indx < sizeof(asoc->cookie_how))
2064 asoc->cookie_how[how_indx] = 16;
2065 /* all other cases... */
2071 * handle a state cookie for a new association m: input packet mbuf chain--
2072 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2073 * and the cookie signature does not exist offset: offset into mbuf to the
2074 * cookie-echo chunk length: length of the cookie chunk to: where the init
2075 * was from returns a new TCB
2077 static struct sctp_tcb *
2078 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2079 struct sockaddr *src, struct sockaddr *dst,
2080 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2081 struct sctp_inpcb *inp, struct sctp_nets **netp,
2082 struct sockaddr *init_src, int *notification,
2083 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2084 uint8_t mflowtype, uint32_t mflowid,
2085 uint32_t vrf_id, uint16_t port)
2087 struct sctp_tcb *stcb;
2088 struct sctp_init_chunk *init_cp, init_buf;
2089 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2090 union sctp_sockstore store;
2091 struct sctp_association *asoc;
2092 int init_offset, initack_offset, initack_limit;
2095 uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
2096 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2099 so = SCTP_INP_SO(inp);
2103 * find and validate the INIT chunk in the cookie (peer's info) the
2104 * INIT should start after the cookie-echo header struct (chunk
2105 * header, state cookie header struct)
2107 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2108 init_cp = (struct sctp_init_chunk *)
2109 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2110 (uint8_t *)&init_buf);
2111 if (init_cp == NULL) {
2112 /* could not pull a INIT chunk in cookie */
2113 SCTPDBG(SCTP_DEBUG_INPUT1,
2114 "process_cookie_new: could not pull INIT chunk hdr\n");
2117 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2118 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2121 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2123 * find and validate the INIT-ACK chunk in the cookie (my info) the
2124 * INIT-ACK follows the INIT chunk
2126 initack_cp = (struct sctp_init_ack_chunk *)
2127 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2128 (uint8_t *)&initack_buf);
2129 if (initack_cp == NULL) {
2130 /* could not pull INIT-ACK chunk in cookie */
2131 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2134 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2138 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2139 * "initack_limit" value. This is because the chk_length field
2140 * includes the length of the cookie, but the cookie is omitted when
2141 * the INIT and INIT_ACK are tacked onto the cookie...
2143 initack_limit = offset + cookie_len;
2146 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2151 * Here we do a trick, we set in NULL for the proc/thread argument.
2152 * We do this since in effect we only use the p argument when the
2153 * socket is unbound and we must do an implicit bind. Since we are
2154 * getting a cookie, we cannot be unbound.
2156 stcb = sctp_aloc_assoc(inp, init_src, &error,
2157 ntohl(initack_cp->init.initiate_tag), vrf_id,
2158 ntohs(initack_cp->init.num_outbound_streams),
2160 (struct thread *)NULL
2163 struct mbuf *op_err;
2165 /* memory problem? */
2166 SCTPDBG(SCTP_DEBUG_INPUT1,
2167 "process_cookie_new: no room for another TCB!\n");
2168 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2169 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2170 src, dst, sh, op_err,
2175 /* get the correct sctp_nets */
2177 *netp = sctp_findnet(stcb, init_src);
2180 /* get scope variables out of cookie */
2181 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2182 asoc->scope.site_scope = cookie->site_scope;
2183 asoc->scope.local_scope = cookie->local_scope;
2184 asoc->scope.loopback_scope = cookie->loopback_scope;
2186 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2187 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2188 struct mbuf *op_err;
2191 * Houston we have a problem. The EP changed while the
2192 * cookie was in flight. Only recourse is to abort the
2195 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2196 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2197 src, dst, sh, op_err,
2200 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2201 atomic_add_int(&stcb->asoc.refcnt, 1);
2202 SCTP_TCB_UNLOCK(stcb);
2203 SCTP_SOCKET_LOCK(so, 1);
2204 SCTP_TCB_LOCK(stcb);
2205 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2207 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2208 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2209 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2210 SCTP_SOCKET_UNLOCK(so, 1);
2214 /* process the INIT-ACK info (my info) */
2215 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2216 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2217 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2218 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2219 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2220 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2221 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2222 asoc->str_reset_seq_in = asoc->init_seq_number;
2224 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2226 /* process the INIT info (peer's info) */
2228 retval = sctp_process_init(init_cp, stcb);
2232 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2233 atomic_add_int(&stcb->asoc.refcnt, 1);
2234 SCTP_TCB_UNLOCK(stcb);
2235 SCTP_SOCKET_LOCK(so, 1);
2236 SCTP_TCB_LOCK(stcb);
2237 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2239 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2240 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2241 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2242 SCTP_SOCKET_UNLOCK(so, 1);
2246 /* load all addresses */
2247 if (sctp_load_addresses_from_init(stcb, m,
2248 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2249 src, dst, init_src, port)) {
2250 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2251 atomic_add_int(&stcb->asoc.refcnt, 1);
2252 SCTP_TCB_UNLOCK(stcb);
2253 SCTP_SOCKET_LOCK(so, 1);
2254 SCTP_TCB_LOCK(stcb);
2255 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2257 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2258 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2259 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2260 SCTP_SOCKET_UNLOCK(so, 1);
2265 * verify any preceding AUTH chunk that was skipped
2267 /* pull the local authentication parameters from the cookie/init-ack */
2268 sctp_auth_get_cookie_params(stcb, m,
2269 initack_offset + sizeof(struct sctp_init_ack_chunk),
2270 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2272 struct sctp_auth_chunk *auth;
2274 auth = (struct sctp_auth_chunk *)
2275 sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2276 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2277 /* auth HMAC failed, dump the assoc and packet */
2278 SCTPDBG(SCTP_DEBUG_AUTH1,
2279 "COOKIE-ECHO: AUTH failed\n");
2280 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2281 atomic_add_int(&stcb->asoc.refcnt, 1);
2282 SCTP_TCB_UNLOCK(stcb);
2283 SCTP_SOCKET_LOCK(so, 1);
2284 SCTP_TCB_LOCK(stcb);
2285 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2287 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2288 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2289 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2290 SCTP_SOCKET_UNLOCK(so, 1);
2294 /* remaining chunks checked... good to go */
2295 stcb->asoc.authenticated = 1;
2300 * if we're doing ASCONFs, check to see if we have any new local
2301 * addresses that need to get added to the peer (eg. addresses
2302 * changed while cookie echo in flight). This needs to be done
2303 * after we go to the OPEN state to do the correct asconf
2304 * processing. else, make sure we have the correct addresses in our
2308 /* warning, we re-use sin, sin6, sa_store here! */
2309 /* pull in local_address (our "from" address) */
2310 switch (cookie->laddr_type) {
2312 case SCTP_IPV4_ADDRESS:
2313 /* source addr is IPv4 */
2314 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2315 store.sin.sin_family = AF_INET;
2316 store.sin.sin_len = sizeof(struct sockaddr_in);
2317 store.sin.sin_addr.s_addr = cookie->laddress[0];
2321 case SCTP_IPV6_ADDRESS:
2322 /* source addr is IPv6 */
2323 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2324 store.sin6.sin6_family = AF_INET6;
2325 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2326 store.sin6.sin6_scope_id = cookie->scope_id;
2327 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2331 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2332 atomic_add_int(&stcb->asoc.refcnt, 1);
2333 SCTP_TCB_UNLOCK(stcb);
2334 SCTP_SOCKET_LOCK(so, 1);
2335 SCTP_TCB_LOCK(stcb);
2336 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2338 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2339 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2340 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2341 SCTP_SOCKET_UNLOCK(so, 1);
2346 /* update current state */
2347 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2348 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2349 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2350 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2351 stcb->sctp_ep, stcb, asoc->primary_destination);
2353 sctp_stop_all_cookie_timers(stcb);
2354 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2355 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2357 /* set up to notify upper layer */
2358 *notification = SCTP_NOTIFY_ASSOC_UP;
2359 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2360 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2361 (inp->sctp_socket->so_qlimit == 0)) {
2363 * This is an endpoint that called connect() how it got a
2364 * cookie that is NEW is a bit of a mystery. It must be that
2365 * the INIT was sent, but before it got there.. a complete
2366 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2367 * should have went to the other code.. not here.. oh well..
2368 * a bit of protection is worth having..
2370 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2371 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2372 atomic_add_int(&stcb->asoc.refcnt, 1);
2373 SCTP_TCB_UNLOCK(stcb);
2374 SCTP_SOCKET_LOCK(so, 1);
2375 SCTP_TCB_LOCK(stcb);
2376 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2377 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2378 SCTP_SOCKET_UNLOCK(so, 1);
2382 soisconnected(stcb->sctp_socket);
2383 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2384 SCTP_SOCKET_UNLOCK(so, 1);
2386 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2387 (inp->sctp_socket->so_qlimit)) {
2389 * We don't want to do anything with this one. Since it is
2390 * the listening guy. The timer will get started for
2391 * accepted connections in the caller.
2395 /* since we did not send a HB make sure we don't double things */
2396 if ((netp) && (*netp))
2397 (*netp)->hb_responded = 1;
2399 if (stcb->asoc.sctp_autoclose_ticks &&
2400 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2401 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2403 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2404 if ((netp != NULL) && (*netp != NULL)) {
2407 /* calculate the RTT and set the encaps port */
2408 old.tv_sec = cookie->time_entered.tv_sec;
2409 old.tv_usec = cookie->time_entered.tv_usec;
2410 (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
2411 &old, SCTP_RTT_FROM_NON_DATA);
2413 /* respond with a COOKIE-ACK */
2414 sctp_send_cookie_ack(stcb);
2417 * check the address lists for any ASCONFs that need to be sent
2418 * AFTER the cookie-ack is sent
2420 sctp_check_address_list(stcb, m,
2421 initack_offset + sizeof(struct sctp_init_ack_chunk),
2422 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2423 &store.sa, cookie->local_scope, cookie->site_scope,
2424 cookie->ipv4_scope, cookie->loopback_scope);
2431 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2432 * we NEED to make sure we are not already using the vtag. If so we
2433 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2434 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2435 SCTP_BASE_INFO(hashasocmark))];
2436 LIST_FOREACH(stcb, head, sctp_asocs) {
2437 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2438 -- SEND ABORT - TRY AGAIN --
2444 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2445 * existing (non-NULL) TCB
2447 static struct mbuf *
2448 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2449 struct sockaddr *src, struct sockaddr *dst,
2450 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2451 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2452 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2453 struct sctp_tcb **locked_tcb,
2454 uint8_t mflowtype, uint32_t mflowid,
2455 uint32_t vrf_id, uint16_t port)
2457 struct sctp_state_cookie *cookie;
2458 struct sctp_tcb *l_stcb = *stcb;
2459 struct sctp_inpcb *l_inp;
2460 struct sockaddr *to;
2461 struct sctp_pcb *ep;
2463 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2465 uint8_t cookie_ok = 0;
2466 unsigned int sig_offset, cookie_offset;
2467 unsigned int cookie_len;
2469 struct timeval time_expires;
2470 int notification = 0;
2471 struct sctp_nets *netl;
2472 int had_a_existing_tcb = 0;
2473 int send_int_conf = 0;
2475 struct sockaddr_in sin;
2478 struct sockaddr_in6 sin6;
2481 SCTPDBG(SCTP_DEBUG_INPUT2,
2482 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2484 if (inp_p == NULL) {
2487 cookie = &cp->cookie;
2488 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2489 cookie_len = ntohs(cp->ch.chunk_length);
2491 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2492 sizeof(struct sctp_init_chunk) +
2493 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2494 /* cookie too small */
2497 if ((cookie->peerport != sh->src_port) ||
2498 (cookie->myport != sh->dest_port) ||
2499 (cookie->my_vtag != sh->v_tag)) {
2501 * invalid ports or bad tag. Note that we always leave the
2502 * v_tag in the header in network order and when we stored
2503 * it in the my_vtag slot we also left it in network order.
2504 * This maintains the match even though it may be in the
2505 * opposite byte order of the machine :->
2510 * split off the signature into its own mbuf (since it should not be
2511 * calculated in the sctp_hmac_m() call).
2513 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2514 m_sig = m_split(m, sig_offset, M_NOWAIT);
2515 if (m_sig == NULL) {
2516 /* out of memory or ?? */
2519 #ifdef SCTP_MBUF_LOGGING
2520 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2521 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2526 * compute the signature/digest for the cookie
2528 ep = &(*inp_p)->sctp_ep;
2531 SCTP_TCB_UNLOCK(l_stcb);
2533 SCTP_INP_RLOCK(l_inp);
2535 SCTP_TCB_LOCK(l_stcb);
2537 /* which cookie is it? */
2538 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2539 (ep->current_secret_number != ep->last_secret_number)) {
2540 /* it's the old cookie */
2541 (void)sctp_hmac_m(SCTP_HMAC,
2542 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2543 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2545 /* it's the current cookie */
2546 (void)sctp_hmac_m(SCTP_HMAC,
2547 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2548 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2550 /* get the signature */
2551 SCTP_INP_RUNLOCK(l_inp);
2552 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2554 /* couldn't find signature */
2555 sctp_m_freem(m_sig);
2558 /* compare the received digest with the computed digest */
2559 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2560 /* try the old cookie? */
2561 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2562 (ep->current_secret_number != ep->last_secret_number)) {
2563 /* compute digest with old */
2564 (void)sctp_hmac_m(SCTP_HMAC,
2565 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2566 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2568 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2576 * Now before we continue we must reconstruct our mbuf so that
2577 * normal processing of any other chunks will work.
2583 while (SCTP_BUF_NEXT(m_at) != NULL) {
2584 m_at = SCTP_BUF_NEXT(m_at);
2586 SCTP_BUF_NEXT(m_at) = m_sig;
2589 if (cookie_ok == 0) {
2590 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2591 SCTPDBG(SCTP_DEBUG_INPUT2,
2592 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2593 (uint32_t)offset, cookie_offset, sig_offset);
2598 * check the cookie timestamps to be sure it's not stale
2600 (void)SCTP_GETTIME_TIMEVAL(&now);
2601 /* Expire time is in Ticks, so we convert to seconds */
2602 time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
2603 time_expires.tv_usec = cookie->time_entered.tv_usec;
2604 if (timevalcmp(&now, &time_expires, >)) {
2605 /* cookie is stale! */
2606 struct mbuf *op_err;
2607 struct sctp_error_stale_cookie *cause;
2608 struct timeval diff;
2611 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2612 0, M_NOWAIT, 1, MT_DATA);
2613 if (op_err == NULL) {
2618 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2619 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2620 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2621 cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
2622 (sizeof(uint32_t))));
2624 timevalsub(&diff, &time_expires);
2625 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2626 staleness = UINT32_MAX;
2628 staleness = diff.tv_sec * 1000000;
2630 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2631 staleness += diff.tv_usec;
2633 staleness = UINT32_MAX;
2635 cause->stale_time = htonl(staleness);
2636 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2637 mflowtype, mflowid, l_inp->fibnum,
2642 * Now we must see with the lookup address if we have an existing
2643 * asoc. This will only happen if we were in the COOKIE-WAIT state
2644 * and a INIT collided with us and somewhere the peer sent the
2645 * cookie on another address besides the single address our assoc
2646 * had for him. In this case we will have one of the tie-tags set at
2647 * least AND the address field in the cookie can be used to look it
2651 switch (cookie->addr_type) {
2653 case SCTP_IPV6_ADDRESS:
2654 memset(&sin6, 0, sizeof(sin6));
2655 sin6.sin6_family = AF_INET6;
2656 sin6.sin6_len = sizeof(sin6);
2657 sin6.sin6_port = sh->src_port;
2658 sin6.sin6_scope_id = cookie->scope_id;
2659 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2660 sizeof(sin6.sin6_addr.s6_addr));
2661 to = (struct sockaddr *)&sin6;
2665 case SCTP_IPV4_ADDRESS:
2666 memset(&sin, 0, sizeof(sin));
2667 sin.sin_family = AF_INET;
2668 sin.sin_len = sizeof(sin);
2669 sin.sin_port = sh->src_port;
2670 sin.sin_addr.s_addr = cookie->address[0];
2671 to = (struct sockaddr *)&sin;
2675 /* This should not happen */
2678 if (*stcb == NULL) {
2679 /* Yep, lets check */
2680 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2681 if (*stcb == NULL) {
2683 * We should have only got back the same inp. If we
2684 * got back a different ep we have a problem. The
2685 * original findep got back l_inp and now
2687 if (l_inp != *inp_p) {
2688 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2691 if (*locked_tcb == NULL) {
2693 * In this case we found the assoc only
2694 * after we locked the create lock. This
2695 * means we are in a colliding case and we
2696 * must make sure that we unlock the tcb if
2697 * its one of the cases where we throw away
2698 * the incoming packets.
2700 *locked_tcb = *stcb;
2703 * We must also increment the inp ref count
2704 * since the ref_count flags was set when we
2705 * did not find the TCB, now we found it
2706 * which reduces the refcount.. we must
2707 * raise it back out to balance it all :-)
2709 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2710 if ((*stcb)->sctp_ep != l_inp) {
2711 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2712 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2718 cookie_len -= SCTP_SIGNATURE_SIZE;
2719 if (*stcb == NULL) {
2720 /* this is the "normal" case... get a new TCB */
2721 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2722 cookie, cookie_len, *inp_p,
2723 netp, to, ¬ification,
2724 auth_skipped, auth_offset, auth_len,
2728 /* this is abnormal... cookie-echo on existing TCB */
2729 had_a_existing_tcb = 1;
2730 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2732 cookie, cookie_len, *inp_p, *stcb, netp, to,
2733 ¬ification, auth_skipped, auth_offset, auth_len,
2738 if (*stcb == NULL) {
2739 /* still no TCB... must be bad cookie-echo */
2742 if (*netp != NULL) {
2743 (*netp)->flowtype = mflowtype;
2744 (*netp)->flowid = mflowid;
2747 * Ok, we built an association so confirm the address we sent the
2750 netl = sctp_findnet(*stcb, to);
2752 * This code should in theory NOT run but
2755 /* TSNH! Huh, why do I need to add this address here? */
2756 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2757 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2760 netl = sctp_findnet(*stcb, to);
2763 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2764 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2765 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2770 sctp_start_net_timers(*stcb);
2771 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2772 if (!had_a_existing_tcb ||
2773 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2775 * If we have a NEW cookie or the connect never
2776 * reached the connected state during collision we
2777 * must do the TCP accept thing.
2779 struct socket *so, *oso;
2780 struct sctp_inpcb *inp;
2782 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2784 * For a restart we will keep the same
2785 * socket, no need to do anything. I THINK!!
2787 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2788 if (send_int_conf) {
2789 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2790 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2794 oso = (*inp_p)->sctp_socket;
2795 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2796 SCTP_TCB_UNLOCK((*stcb));
2797 CURVNET_SET(oso->so_vnet);
2798 so = sonewconn(oso, 0
2801 SCTP_TCB_LOCK((*stcb));
2802 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2805 struct mbuf *op_err;
2806 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2807 struct socket *pcb_so;
2809 /* Too many sockets */
2810 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2811 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2812 sctp_abort_association(*inp_p, NULL, m, iphlen,
2813 src, dst, sh, op_err,
2816 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2817 pcb_so = SCTP_INP_SO(*inp_p);
2818 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2819 SCTP_TCB_UNLOCK((*stcb));
2820 SCTP_SOCKET_LOCK(pcb_so, 1);
2821 SCTP_TCB_LOCK((*stcb));
2822 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2824 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2825 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2826 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2827 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2831 inp = (struct sctp_inpcb *)so->so_pcb;
2832 SCTP_INP_INCR_REF(inp);
2834 * We add the unbound flag here so that if we get an
2835 * soabort() before we get the move_pcb done, we
2836 * will properly cleanup.
2838 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2839 SCTP_PCB_FLAGS_CONNECTED |
2840 SCTP_PCB_FLAGS_IN_TCPPOOL |
2841 SCTP_PCB_FLAGS_UNBOUND |
2842 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2843 SCTP_PCB_FLAGS_DONT_WAKE);
2844 inp->sctp_features = (*inp_p)->sctp_features;
2845 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2846 inp->sctp_socket = so;
2847 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2848 inp->max_cwnd = (*inp_p)->max_cwnd;
2849 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2850 inp->ecn_supported = (*inp_p)->ecn_supported;
2851 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2852 inp->auth_supported = (*inp_p)->auth_supported;
2853 inp->asconf_supported = (*inp_p)->asconf_supported;
2854 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2855 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2856 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2857 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2858 inp->sctp_context = (*inp_p)->sctp_context;
2859 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2860 inp->fibnum = (*inp_p)->fibnum;
2861 inp->inp_starting_point_for_iterator = NULL;
2863 * copy in the authentication parameters from the
2866 if (inp->sctp_ep.local_hmacs)
2867 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2868 inp->sctp_ep.local_hmacs =
2869 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2870 if (inp->sctp_ep.local_auth_chunks)
2871 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2872 inp->sctp_ep.local_auth_chunks =
2873 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2876 * Now we must move it from one hash table to
2877 * another and get the tcb in the right place.
2881 * This is where the one-2-one socket is put into
2882 * the accept state waiting for the accept!
2885 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2887 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2889 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2890 SCTP_TCB_UNLOCK((*stcb));
2892 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2894 SCTP_TCB_LOCK((*stcb));
2895 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2899 * now we must check to see if we were aborted while
2900 * the move was going on and the lock/unlock
2903 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2905 * yep it was, we leave the assoc attached
2906 * to the socket since the sctp_inpcb_free()
2907 * call will send an abort for us.
2909 SCTP_INP_DECR_REF(inp);
2912 SCTP_INP_DECR_REF(inp);
2913 /* Switch over to the new guy */
2915 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2916 if (send_int_conf) {
2917 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2918 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2922 * Pull it from the incomplete queue and wake the
2925 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2926 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2927 SCTP_TCB_UNLOCK((*stcb));
2928 SCTP_SOCKET_LOCK(so, 1);
2931 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2932 SCTP_TCB_LOCK((*stcb));
2933 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2934 SCTP_SOCKET_UNLOCK(so, 1);
2940 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2942 if (send_int_conf) {
2943 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2944 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2950 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2951 struct sctp_tcb *stcb, struct sctp_nets *net)
2953 /* cp must not be used, others call this without a c-ack :-) */
2954 struct sctp_association *asoc;
2956 SCTPDBG(SCTP_DEBUG_INPUT2,
2957 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2958 if ((stcb == NULL) || (net == NULL)) {
2963 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2964 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2965 asoc->overall_error_count,
2967 SCTP_FROM_SCTP_INPUT,
2970 asoc->overall_error_count = 0;
2971 sctp_stop_all_cookie_timers(stcb);
2972 /* process according to association state */
2973 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2974 /* state change only needed when I am in right state */
2975 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2976 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2977 sctp_start_net_timers(stcb);
2978 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2979 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2980 stcb->sctp_ep, stcb, asoc->primary_destination);
2984 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2985 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2986 if (asoc->overall_error_count == 0) {
2987 net->RTO = sctp_calculate_rto(stcb, asoc, net,
2988 &asoc->time_entered,
2989 SCTP_RTT_FROM_NON_DATA);
2991 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2992 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2993 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2994 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2995 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2999 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
3000 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3001 so = SCTP_INP_SO(stcb->sctp_ep);
3002 atomic_add_int(&stcb->asoc.refcnt, 1);
3003 SCTP_TCB_UNLOCK(stcb);
3004 SCTP_SOCKET_LOCK(so, 1);
3005 SCTP_TCB_LOCK(stcb);
3006 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3008 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
3009 soisconnected(stcb->sctp_socket);
3011 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3012 SCTP_SOCKET_UNLOCK(so, 1);
3016 * since we did not send a HB make sure we don't double
3019 net->hb_responded = 1;
3021 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
3023 * We don't need to do the asconf thing, nor hb or
3024 * autoclose if the socket is closed.
3029 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
3033 if (stcb->asoc.sctp_autoclose_ticks &&
3034 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
3035 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
3036 stcb->sctp_ep, stcb, NULL);
3039 * send ASCONF if parameters are pending and ASCONFs are
3040 * allowed (eg. addresses changed when init/cookie echo were
3043 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
3044 (stcb->asoc.asconf_supported == 1) &&
3045 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
3046 #ifdef SCTP_TIMER_BASED_ASCONF
3047 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
3048 stcb->sctp_ep, stcb,
3049 stcb->asoc.primary_destination);
3051 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
3052 SCTP_ADDR_NOT_LOCKED);
3057 /* Toss the cookie if I can */
3058 sctp_toss_old_cookies(stcb, asoc);
3059 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3060 /* Restart the timer if we have pending data */
3061 struct sctp_tmit_chunk *chk;
3063 chk = TAILQ_FIRST(&asoc->sent_queue);
3064 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
3069 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
3070 struct sctp_tcb *stcb)
3072 struct sctp_nets *net;
3073 struct sctp_tmit_chunk *lchk;
3074 struct sctp_ecne_chunk bkup;
3075 uint8_t override_bit;
3076 uint32_t tsn, window_data_tsn;
3078 unsigned int pkt_cnt;
3080 len = ntohs(cp->ch.chunk_length);
3081 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3082 (len != sizeof(struct old_sctp_ecne_chunk))) {
3085 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3086 /* Its the old format */
3087 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3088 bkup.num_pkts_since_cwr = htonl(1);
3091 SCTP_STAT_INCR(sctps_recvecne);
3092 tsn = ntohl(cp->tsn);
3093 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3094 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3096 window_data_tsn = stcb->asoc.sending_seq - 1;
3098 window_data_tsn = lchk->rec.data.tsn;
3101 /* Find where it was sent to if possible. */
3103 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3104 if (lchk->rec.data.tsn == tsn) {
3106 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3109 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
3115 * What to do. A previous send of a CWR was possibly lost.
3116 * See how old it is, we may have it marked on the actual
3119 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3120 if (tsn == net->last_cwr_tsn) {
3121 /* Found him, send it off */
3127 * If we reach here, we need to send a special CWR
3128 * that says hey, we did this a long time ago and
3129 * you lost the response.
3131 net = TAILQ_FIRST(&stcb->asoc.nets);
3136 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3143 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3144 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3146 * JRS - Use the congestion control given in the pluggable
3149 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3151 * We reduce once every RTT. So we will only lower cwnd at
3152 * the next sending seq i.e. the window_data_tsn
3154 net->cwr_window_tsn = window_data_tsn;
3155 net->ecn_ce_pkt_cnt += pkt_cnt;
3156 net->lost_cnt = pkt_cnt;
3157 net->last_cwr_tsn = tsn;
3159 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3160 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3161 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3163 * Another loss in the same window update how many
3164 * marks/packets lost we have had.
3168 if (pkt_cnt > net->lost_cnt) {
3169 /* Should be the case */
3170 cnt = (pkt_cnt - net->lost_cnt);
3171 net->ecn_ce_pkt_cnt += cnt;
3173 net->lost_cnt = pkt_cnt;
3174 net->last_cwr_tsn = tsn;
3176 * Most CC functions will ignore this call, since we
3177 * are in-window yet of the initial CE the peer saw.
3179 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3183 * We always send a CWR this way if our previous one was lost our
3184 * peer will get an update, or if it is not time again to reduce we
3185 * still get the cwr to the peer. Note we set the override when we
3186 * could not find the TSN on the chunk or the destination network.
3188 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3192 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3195 * Here we get a CWR from the peer. We must look in the outqueue and
3196 * make sure that we have a covered ECNE in the control chunk part.
3199 struct sctp_tmit_chunk *chk, *nchk;
3200 struct sctp_ecne_chunk *ecne;
3204 cwr_tsn = ntohl(cp->tsn);
3205 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3206 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
3207 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3210 if ((override == 0) && (chk->whoTo != net)) {
3211 /* Must be from the right src unless override is set */
3214 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3215 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3216 /* this covers this ECNE, we can remove it */
3217 stcb->asoc.ecn_echo_cnt_onq--;
3218 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3220 stcb->asoc.ctrl_queue_cnt--;
3221 sctp_m_freem(chk->data);
3223 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3224 if (override == 0) {
3232 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3233 struct sctp_tcb *stcb, struct sctp_nets *net)
3235 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3239 SCTPDBG(SCTP_DEBUG_INPUT2,
3240 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3244 /* process according to association state */
3245 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3246 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3247 SCTPDBG(SCTP_DEBUG_INPUT2,
3248 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3249 SCTP_TCB_UNLOCK(stcb);
3252 /* notify upper layer protocol */
3253 if (stcb->sctp_socket) {
3254 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3257 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3258 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3259 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3260 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3263 /* stop the timer */
3264 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3265 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3266 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3268 SCTPDBG(SCTP_DEBUG_INPUT2,
3269 "sctp_handle_shutdown_complete: calls free-asoc\n");
3270 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3271 so = SCTP_INP_SO(stcb->sctp_ep);
3272 atomic_add_int(&stcb->asoc.refcnt, 1);
3273 SCTP_TCB_UNLOCK(stcb);
3274 SCTP_SOCKET_LOCK(so, 1);
3275 SCTP_TCB_LOCK(stcb);
3276 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3278 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3279 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3280 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3281 SCTP_SOCKET_UNLOCK(so, 1);
3287 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3288 struct sctp_nets *net, uint8_t flg)
3290 switch (desc->chunk_type) {
3292 /* find the tsn to resend (possibly */
3295 struct sctp_tmit_chunk *tp1;
3297 tsn = ntohl(desc->tsn_ifany);
3298 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3299 if (tp1->rec.data.tsn == tsn) {
3303 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3311 * Do it the other way , aka without paying
3312 * attention to queue seq order.
3314 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3315 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3316 if (tp1->rec.data.tsn == tsn) {
3323 SCTP_STAT_INCR(sctps_pdrptsnnf);
3325 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3328 if (((flg & SCTP_BADCRC) == 0) &&
3329 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3332 if ((stcb->asoc.peers_rwnd == 0) &&
3333 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3334 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3337 if (stcb->asoc.peers_rwnd == 0 &&
3338 (flg & SCTP_FROM_MIDDLE_BOX)) {
3339 SCTP_STAT_INCR(sctps_pdrpdizrw);
3342 ddp = (uint8_t *)(mtod(tp1->data, caddr_t)+
3343 sizeof(struct sctp_data_chunk));
3347 for (iii = 0; iii < sizeof(desc->data_bytes);
3349 if (ddp[iii] != desc->data_bytes[iii]) {
3350 SCTP_STAT_INCR(sctps_pdrpbadd);
3358 * this guy had a RTO calculation
3359 * pending on it, cancel it
3361 if (tp1->whoTo->rto_needed == 0) {
3362 tp1->whoTo->rto_needed = 1;
3366 SCTP_STAT_INCR(sctps_pdrpmark);
3367 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3368 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3370 * mark it as if we were doing a FR, since
3371 * we will be getting gap ack reports behind
3372 * the info from the router.
3374 tp1->rec.data.doing_fast_retransmit = 1;
3376 * mark the tsn with what sequences can
3379 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3380 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3382 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3385 /* restart the timer */
3386 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3388 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3389 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3392 /* fix counts and things */
3393 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3394 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3395 tp1->whoTo->flight_size,
3397 (uint32_t)(uintptr_t)stcb,
3400 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3401 sctp_flight_size_decrease(tp1);
3402 sctp_total_flight_decrease(stcb, tp1);
3404 tp1->sent = SCTP_DATAGRAM_RESEND;
3410 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3411 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3414 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3416 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3419 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3420 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3421 audit, stcb->asoc.sent_queue_retran_cnt);
3422 #ifndef SCTP_AUDITING_ENABLED
3423 stcb->asoc.sent_queue_retran_cnt = audit;
3431 struct sctp_tmit_chunk *asconf;
3433 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3435 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3440 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3441 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3442 asconf->sent = SCTP_DATAGRAM_RESEND;
3443 asconf->snd_count--;
3447 case SCTP_INITIATION:
3448 /* resend the INIT */
3449 stcb->asoc.dropped_special_cnt++;
3450 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3452 * If we can get it in, in a few attempts we do
3453 * this, otherwise we let the timer fire.
3455 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3457 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3458 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3461 case SCTP_SELECTIVE_ACK:
3462 case SCTP_NR_SELECTIVE_ACK:
3463 /* resend the sack */
3464 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3466 case SCTP_HEARTBEAT_REQUEST:
3467 /* resend a demand HB */
3468 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3470 * Only retransmit if we KNOW we wont destroy the
3473 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3477 sctp_send_shutdown(stcb, net);
3479 case SCTP_SHUTDOWN_ACK:
3480 sctp_send_shutdown_ack(stcb, net);
3482 case SCTP_COOKIE_ECHO:
3484 struct sctp_tmit_chunk *cookie;
3487 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3489 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3494 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3495 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3496 cookie->sent = SCTP_DATAGRAM_RESEND;
3497 sctp_stop_all_cookie_timers(stcb);
3501 case SCTP_COOKIE_ACK:
3502 sctp_send_cookie_ack(stcb);
3504 case SCTP_ASCONF_ACK:
3505 /* resend last asconf ack */
3506 sctp_send_asconf_ack(stcb);
3508 case SCTP_IFORWARD_CUM_TSN:
3509 case SCTP_FORWARD_CUM_TSN:
3510 send_forward_tsn(stcb, &stcb->asoc);
3512 /* can't do anything with these */
3513 case SCTP_PACKET_DROPPED:
3514 case SCTP_INITIATION_ACK: /* this should not happen */
3515 case SCTP_HEARTBEAT_ACK:
3516 case SCTP_ABORT_ASSOCIATION:
3517 case SCTP_OPERATION_ERROR:
3518 case SCTP_SHUTDOWN_COMPLETE:
3528 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3534 * We set things to 0xffffffff since this is the last delivered
3535 * sequence and we will be sending in 0 after the reset.
3538 if (number_entries) {
3539 for (i = 0; i < number_entries; i++) {
3540 temp = ntohs(list[i]);
3541 if (temp >= stcb->asoc.streamincnt) {
3544 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3548 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3549 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3552 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3556 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3561 if (number_entries > 0) {
3562 for (i = 0; i < number_entries; i++) {
3563 temp = ntohs(list[i]);
3564 if (temp >= stcb->asoc.streamoutcnt) {
3565 /* no such stream */
3568 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3569 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3572 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3573 stcb->asoc.strmout[i].next_mid_ordered = 0;
3574 stcb->asoc.strmout[i].next_mid_unordered = 0;
3577 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3581 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3586 if (number_entries > 0) {
3587 for (i = 0; i < number_entries; i++) {
3588 temp = ntohs(list[i]);
3589 if (temp >= stcb->asoc.streamoutcnt) {
3590 /* no such stream */
3593 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3596 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3597 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3603 struct sctp_stream_reset_request *
3604 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3606 struct sctp_association *asoc;
3607 struct sctp_chunkhdr *ch;
3608 struct sctp_stream_reset_request *r;
3609 struct sctp_tmit_chunk *chk;
3613 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3614 asoc->stream_reset_outstanding = 0;
3617 if (stcb->asoc.str_reset == NULL) {
3618 asoc->stream_reset_outstanding = 0;
3621 chk = stcb->asoc.str_reset;
3622 if (chk->data == NULL) {
3626 /* he wants a copy of the chk pointer */
3629 clen = chk->send_size;
3630 ch = mtod(chk->data, struct sctp_chunkhdr *);
3631 r = (struct sctp_stream_reset_request *)(ch + 1);
3632 if (ntohl(r->request_seq) == seq) {
3636 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3637 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3638 /* move to the next one, there can only be a max of two */
3639 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3640 if (ntohl(r->request_seq) == seq) {
3644 /* that seq is not here */
3649 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3651 struct sctp_association *asoc;
3652 struct sctp_tmit_chunk *chk;
3655 chk = asoc->str_reset;
3659 asoc->str_reset = NULL;
3660 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3661 chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3662 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3663 asoc->ctrl_queue_cnt--;
3665 sctp_m_freem(chk->data);
3668 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3673 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3674 uint32_t seq, uint32_t action,
3675 struct sctp_stream_reset_response *respin)
3679 struct sctp_association *asoc = &stcb->asoc;
3680 struct sctp_tmit_chunk *chk;
3681 struct sctp_stream_reset_request *req_param;
3682 struct sctp_stream_reset_out_request *req_out_param;
3683 struct sctp_stream_reset_in_request *req_in_param;
3684 uint32_t number_entries;
3686 if (asoc->stream_reset_outstanding == 0) {
3690 if (seq == stcb->asoc.str_reset_seq_out) {
3691 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3692 if (req_param != NULL) {
3693 stcb->asoc.str_reset_seq_out++;
3694 type = ntohs(req_param->ph.param_type);
3695 lparam_len = ntohs(req_param->ph.param_length);
3696 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3699 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3700 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3701 asoc->stream_reset_out_is_outstanding = 0;
3702 if (asoc->stream_reset_outstanding)
3703 asoc->stream_reset_outstanding--;
3704 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3706 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3707 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3708 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3709 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3711 * Set it up so we don't stop
3714 asoc->stream_reset_outstanding++;
3715 stcb->asoc.str_reset_seq_out--;
3716 asoc->stream_reset_out_is_outstanding = 1;
3719 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3721 if (no_clear == 0) {
3722 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3724 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3725 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3726 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3727 if (asoc->stream_reset_outstanding)
3728 asoc->stream_reset_outstanding--;
3729 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3730 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3731 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3732 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3733 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3734 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3736 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3737 /* Ok we now may have more streams */
3740 num_stream = stcb->asoc.strm_pending_add_size;
3741 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3743 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3745 stcb->asoc.strm_pending_add_size = 0;
3746 if (asoc->stream_reset_outstanding)
3747 asoc->stream_reset_outstanding--;
3748 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3749 /* Put the new streams into effect */
3752 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3753 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3755 asoc->streamoutcnt += num_stream;
3756 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3757 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3758 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3759 SCTP_STREAM_CHANGE_DENIED);
3761 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3762 SCTP_STREAM_CHANGE_FAILED);
3764 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3765 if (asoc->stream_reset_outstanding)
3766 asoc->stream_reset_outstanding--;
3767 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3768 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3769 SCTP_STREAM_CHANGE_DENIED);
3770 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3771 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3772 SCTP_STREAM_CHANGE_FAILED);
3774 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3776 * a) Adopt the new in tsn.
3778 * c) Adopt the new out-tsn
3780 struct sctp_stream_reset_response_tsn *resp;
3781 struct sctp_forward_tsn_chunk fwdtsn;
3784 if (respin == NULL) {
3788 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3791 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3792 resp = (struct sctp_stream_reset_response_tsn *)respin;
3793 asoc->stream_reset_outstanding--;
3794 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3795 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3796 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3797 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3801 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3802 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3803 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3806 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3807 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3808 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3810 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3811 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3813 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3814 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3816 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3817 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3818 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3819 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3820 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3821 SCTP_ASSOC_RESET_DENIED);
3823 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3824 SCTP_ASSOC_RESET_FAILED);
3827 /* get rid of the request and get the request flags */
3828 if (asoc->stream_reset_outstanding == 0) {
3829 sctp_clean_up_stream_reset(stcb);
3833 if (asoc->stream_reset_outstanding == 0) {
3834 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3840 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3841 struct sctp_tmit_chunk *chk,
3842 struct sctp_stream_reset_in_request *req, int trunc)
3850 * peer wants me to send a str-reset to him for my outgoing seq's if
3853 struct sctp_association *asoc = &stcb->asoc;
3855 seq = ntohl(req->request_seq);
3856 if (asoc->str_reset_seq_in == seq) {
3857 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3858 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3859 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3861 /* Can't do it, since they exceeded our buffer size */
3862 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3863 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3864 len = ntohs(req->ph.param_length);
3865 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3866 if (number_entries) {
3867 for (i = 0; i < number_entries; i++) {
3868 temp = ntohs(req->list_of_streams[i]);
3869 if (temp >= stcb->asoc.streamoutcnt) {
3870 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3873 req->list_of_streams[i] = temp;
3875 for (i = 0; i < number_entries; i++) {
3876 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3877 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3882 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3883 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3884 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3887 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3889 /* Can't do it, since we have sent one out */
3890 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3893 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3894 asoc->str_reset_seq_in++;
3895 } else if (asoc->str_reset_seq_in - 1 == seq) {
3896 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3897 } else if (asoc->str_reset_seq_in - 2 == seq) {
3898 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3900 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3902 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3906 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3907 struct sctp_tmit_chunk *chk,
3908 struct sctp_stream_reset_tsn_request *req)
3910 /* reset all in and out and update the tsn */
3912 * A) reset my str-seq's on in and out. B) Select a receive next,
3913 * and set cum-ack to it. Also process this selected number as a
3914 * fwd-tsn as well. C) set in the response my next sending seq.
3916 struct sctp_forward_tsn_chunk fwdtsn;
3917 struct sctp_association *asoc = &stcb->asoc;
3921 seq = ntohl(req->request_seq);
3922 if (asoc->str_reset_seq_in == seq) {
3923 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3924 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3925 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3927 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3928 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3929 fwdtsn.ch.chunk_flags = 0;
3930 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3931 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3935 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3936 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3937 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3939 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3940 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3941 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3942 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3943 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3944 atomic_add_int(&asoc->sending_seq, 1);
3945 /* save off historical data for retrans */
3946 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3947 asoc->last_sending_seq[0] = asoc->sending_seq;
3948 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3949 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3950 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3951 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3952 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3953 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3955 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3956 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3957 asoc->str_reset_seq_in++;
3958 } else if (asoc->str_reset_seq_in - 1 == seq) {
3959 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3960 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3961 } else if (asoc->str_reset_seq_in - 2 == seq) {
3962 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3963 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3965 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3971 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3972 struct sctp_tmit_chunk *chk,
3973 struct sctp_stream_reset_out_request *req, int trunc)
3976 int number_entries, len;
3977 struct sctp_association *asoc = &stcb->asoc;
3979 seq = ntohl(req->request_seq);
3981 /* now if its not a duplicate we process it */
3982 if (asoc->str_reset_seq_in == seq) {
3983 len = ntohs(req->ph.param_length);
3984 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3986 * the sender is resetting, handle the list issue.. we must
3987 * a) verify if we can do the reset, if so no problem b) If
3988 * we can't do the reset we must copy the request. c) queue
3989 * it, and setup the data in processor to trigger it off
3990 * when needed and dequeue all the queued data.
3992 tsn = ntohl(req->send_reset_at_tsn);
3994 /* move the reset action back one */
3995 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3996 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3997 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3999 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4000 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
4001 /* we can do it now */
4002 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
4003 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4006 * we must queue it up and thus wait for the TSN's
4007 * to arrive that are at or before tsn
4009 struct sctp_stream_reset_list *liste;
4012 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
4013 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
4014 siz, SCTP_M_STRESET);
4015 if (liste == NULL) {
4016 /* gak out of memory */
4017 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4018 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4023 liste->number_entries = number_entries;
4024 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
4025 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
4026 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
4028 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4029 asoc->str_reset_seq_in++;
4030 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4032 * one seq back, just echo back last action since my
4033 * response was lost.
4035 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4036 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4038 * two seq back, just echo back last action since my
4039 * response was lost.
4041 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4043 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4048 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4049 struct sctp_stream_reset_add_strm *str_add)
4052 * Peer is requesting to add more streams. If its within our
4053 * max-streams we will allow it.
4055 uint32_t num_stream, i;
4057 struct sctp_association *asoc = &stcb->asoc;
4058 struct sctp_queued_to_read *ctl, *nctl;
4060 /* Get the number. */
4061 seq = ntohl(str_add->request_seq);
4062 num_stream = ntohs(str_add->number_of_streams);
4063 /* Now what would be the new total? */
4064 if (asoc->str_reset_seq_in == seq) {
4065 num_stream += stcb->asoc.streamincnt;
4066 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4067 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4068 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4069 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
4070 (num_stream > 0xffff)) {
4071 /* We must reject it they ask for to many */
4073 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4075 /* Ok, we can do that :-) */
4076 struct sctp_stream_in *oldstrm;
4078 /* save off the old */
4079 oldstrm = stcb->asoc.strmin;
4080 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
4081 (num_stream * sizeof(struct sctp_stream_in)),
4083 if (stcb->asoc.strmin == NULL) {
4084 stcb->asoc.strmin = oldstrm;
4087 /* copy off the old data */
4088 for (i = 0; i < stcb->asoc.streamincnt; i++) {
4089 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4090 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4091 stcb->asoc.strmin[i].sid = i;
4092 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
4093 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
4094 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
4095 /* now anything on those queues? */
4096 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
4097 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
4098 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
4100 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
4101 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
4102 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
4105 /* Init the new streams */
4106 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
4107 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4108 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4109 stcb->asoc.strmin[i].sid = i;
4110 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
4111 stcb->asoc.strmin[i].pd_api_started = 0;
4112 stcb->asoc.strmin[i].delivery_started = 0;
4114 SCTP_FREE(oldstrm, SCTP_M_STRMI);
4115 /* update the size */
4116 stcb->asoc.streamincnt = num_stream;
4117 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4118 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
4120 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4121 asoc->str_reset_seq_in++;
4122 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4124 * one seq back, just echo back last action since my
4125 * response was lost.
4127 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4128 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4130 * two seq back, just echo back last action since my
4131 * response was lost.
4133 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4135 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4141 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4142 struct sctp_stream_reset_add_strm *str_add)
4145 * Peer is requesting to add more streams. If its within our
4146 * max-streams we will allow it.
4148 uint16_t num_stream;
4150 struct sctp_association *asoc = &stcb->asoc;
4152 /* Get the number. */
4153 seq = ntohl(str_add->request_seq);
4154 num_stream = ntohs(str_add->number_of_streams);
4155 /* Now what would be the new total? */
4156 if (asoc->str_reset_seq_in == seq) {
4157 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4158 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4159 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4160 } else if (stcb->asoc.stream_reset_outstanding) {
4161 /* We must reject it we have something pending */
4162 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4164 /* Ok, we can do that :-) */
4167 mychk = stcb->asoc.streamoutcnt;
4168 mychk += num_stream;
4169 if (mychk < 0x10000) {
4170 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4171 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
4172 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4175 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4178 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4179 asoc->str_reset_seq_in++;
4180 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4182 * one seq back, just echo back last action since my
4183 * response was lost.
4185 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4186 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4188 * two seq back, just echo back last action since my
4189 * response was lost.
4191 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4193 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4198 __attribute__((noinline))
4201 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4202 struct sctp_chunkhdr *ch_req)
4204 uint16_t remaining_length, param_len, ptype;
4205 struct sctp_paramhdr pstore;
4206 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4210 struct sctp_tmit_chunk *chk;
4211 struct sctp_chunkhdr *ch;
4212 struct sctp_paramhdr *ph;
4216 /* now it may be a reset or a reset-response */
4217 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
4219 /* setup for adding the response */
4220 sctp_alloc_a_chunk(stcb, chk);
4224 chk->copy_by_ref = 0;
4225 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4226 chk->rec.chunk_id.can_take_data = 0;
4228 chk->asoc = &stcb->asoc;
4229 chk->no_fr_allowed = 0;
4230 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4231 chk->book_size_scale = 0;
4232 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4233 if (chk->data == NULL) {
4236 sctp_m_freem(chk->data);
4239 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4242 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4244 /* setup chunk parameters */
4245 chk->sent = SCTP_DATAGRAM_UNSENT;
4249 ch = mtod(chk->data, struct sctp_chunkhdr *);
4250 ch->chunk_type = SCTP_STREAM_RESET;
4251 ch->chunk_flags = 0;
4252 ch->chunk_length = htons(chk->send_size);
4253 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4254 offset += sizeof(struct sctp_chunkhdr);
4255 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4256 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4261 param_len = ntohs(ph->param_length);
4262 if ((param_len > remaining_length) ||
4263 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4264 /* bad parameter length */
4267 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4268 (uint8_t *)&cstore);
4273 ptype = ntohs(ph->param_type);
4275 if (param_len > sizeof(cstore)) {
4280 if (num_param > SCTP_MAX_RESET_PARAMS) {
4281 /* hit the max of parameters already sorry.. */
4284 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4285 struct sctp_stream_reset_out_request *req_out;
4287 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4290 req_out = (struct sctp_stream_reset_out_request *)ph;
4292 if (stcb->asoc.stream_reset_outstanding) {
4293 seq = ntohl(req_out->response_seq);
4294 if (seq == stcb->asoc.str_reset_seq_out) {
4296 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4299 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4300 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4301 struct sctp_stream_reset_add_strm *str_add;
4303 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4306 str_add = (struct sctp_stream_reset_add_strm *)ph;
4308 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4309 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4310 struct sctp_stream_reset_add_strm *str_add;
4312 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4315 str_add = (struct sctp_stream_reset_add_strm *)ph;
4317 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4318 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4319 struct sctp_stream_reset_in_request *req_in;
4322 req_in = (struct sctp_stream_reset_in_request *)ph;
4323 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4324 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4325 struct sctp_stream_reset_tsn_request *req_tsn;
4328 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4329 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4331 goto strres_nochunk;
4335 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4336 struct sctp_stream_reset_response *resp;
4339 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4342 resp = (struct sctp_stream_reset_response *)ph;
4343 seq = ntohl(resp->response_seq);
4344 result = ntohl(resp->result);
4345 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4347 goto strres_nochunk;
4352 offset += SCTP_SIZE32(param_len);
4353 if (remaining_length >= SCTP_SIZE32(param_len)) {
4354 remaining_length -= SCTP_SIZE32(param_len);
4356 remaining_length = 0;
4360 /* we have no response free the stuff */
4361 goto strres_nochunk;
4363 /* ok we have a chunk to link in */
4364 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4367 stcb->asoc.ctrl_queue_cnt++;
4372 * Handle a router or endpoints report of a packet loss, there are two ways
4373 * to handle this, either we get the whole packet and must disect it
4374 * ourselves (possibly with truncation and or corruption) or it is a summary
4375 * from a middle box that did the disectting for us.
4378 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4379 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4381 uint32_t bottle_bw, on_queue;
4385 struct sctp_chunk_desc desc;
4386 struct sctp_chunkhdr *ch;
4388 chlen = ntohs(cp->ch.chunk_length);
4389 chlen -= sizeof(struct sctp_pktdrop_chunk);
4390 /* XXX possible chlen underflow */
4393 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4394 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4396 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4397 chlen -= sizeof(struct sctphdr);
4398 /* XXX possible chlen underflow */
4399 memset(&desc, 0, sizeof(desc));
4401 trunc_len = (uint16_t)ntohs(cp->trunc_len);
4402 if (trunc_len > limit) {
4406 /* now the chunks themselves */
4407 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4408 desc.chunk_type = ch->chunk_type;
4409 /* get amount we need to move */
4410 at = ntohs(ch->chunk_length);
4411 if (at < sizeof(struct sctp_chunkhdr)) {
4412 /* corrupt chunk, maybe at the end? */
4413 SCTP_STAT_INCR(sctps_pdrpcrupt);
4416 if (trunc_len == 0) {
4417 /* we are supposed to have all of it */
4419 /* corrupt skip it */
4420 SCTP_STAT_INCR(sctps_pdrpcrupt);
4424 /* is there enough of it left ? */
4425 if (desc.chunk_type == SCTP_DATA) {
4426 if (chlen < (sizeof(struct sctp_data_chunk) +
4427 sizeof(desc.data_bytes))) {
4431 if (chlen < sizeof(struct sctp_chunkhdr)) {
4436 if (desc.chunk_type == SCTP_DATA) {
4437 /* can we get out the tsn? */
4438 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4439 SCTP_STAT_INCR(sctps_pdrpmbda);
4441 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4443 struct sctp_data_chunk *dcp;
4447 dcp = (struct sctp_data_chunk *)ch;
4448 ddp = (uint8_t *)(dcp + 1);
4449 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4450 desc.data_bytes[iii] = ddp[iii];
4452 desc.tsn_ifany = dcp->dp.tsn;
4454 /* nope we are done. */
4455 SCTP_STAT_INCR(sctps_pdrpnedat);
4459 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4460 SCTP_STAT_INCR(sctps_pdrpmbct);
4463 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4464 SCTP_STAT_INCR(sctps_pdrppdbrk);
4467 if (SCTP_SIZE32(at) > chlen) {
4470 chlen -= SCTP_SIZE32(at);
4471 if (chlen < sizeof(struct sctp_chunkhdr)) {
4472 /* done, none left */
4475 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4477 /* Now update any rwnd --- possibly */
4478 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4479 /* From a peer, we get a rwnd report */
4482 SCTP_STAT_INCR(sctps_pdrpfehos);
4484 bottle_bw = ntohl(cp->bottle_bw);
4485 on_queue = ntohl(cp->current_onq);
4486 if (bottle_bw && on_queue) {
4487 /* a rwnd report is in here */
4488 if (bottle_bw > on_queue)
4489 a_rwnd = bottle_bw - on_queue;
4494 stcb->asoc.peers_rwnd = 0;
4496 if (a_rwnd > stcb->asoc.total_flight) {
4497 stcb->asoc.peers_rwnd =
4498 a_rwnd - stcb->asoc.total_flight;
4500 stcb->asoc.peers_rwnd = 0;
4502 if (stcb->asoc.peers_rwnd <
4503 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4504 /* SWS sender side engages */
4505 stcb->asoc.peers_rwnd = 0;
4510 SCTP_STAT_INCR(sctps_pdrpfmbox);
4513 /* now middle boxes in sat networks get a cwnd bump */
4514 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4515 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4516 (stcb->asoc.sat_network)) {
4518 * This is debatable but for sat networks it makes sense
4519 * Note if a T3 timer has went off, we will prohibit any
4520 * changes to cwnd until we exit the t3 loss recovery.
4522 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4523 net, cp, &bottle_bw, &on_queue);
4528 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4529 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4530 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4531 * length of the complete packet outputs: - length: modified to remaining
4532 * length after control processing - netp: modified to new sctp_nets after
4533 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4534 * bad packet,...) otherwise return the tcb for this packet
4537 __attribute__((noinline))
4539 static struct sctp_tcb *
4540 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4541 struct sockaddr *src, struct sockaddr *dst,
4542 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4543 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4544 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4545 uint32_t vrf_id, uint16_t port)
4547 struct sctp_association *asoc;
4548 struct mbuf *op_err;
4549 char msg[SCTP_DIAG_INFO_LEN];
4551 int num_chunks = 0; /* number of control chunks processed */
4552 uint32_t chk_length, contiguous;
4554 int abort_no_unlock = 0;
4558 * How big should this be, and should it be alloc'd? Lets try the
4559 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4560 * until we get into jumbo grams and such..
4562 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4564 uint32_t auth_offset = 0, auth_len = 0;
4565 int auth_skipped = 0;
4567 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4571 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4572 iphlen, *offset, length, (void *)stcb);
4575 SCTP_TCB_LOCK_ASSERT(stcb);
4577 /* validate chunk header length... */
4578 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4579 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4580 ntohs(ch->chunk_length));
4585 * validate the verification tag
4587 vtag_in = ntohl(sh->v_tag);
4589 if (ch->chunk_type == SCTP_INITIATION) {
4590 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4591 ntohs(ch->chunk_length), vtag_in);
4593 /* protocol error- silently discard... */
4594 SCTP_STAT_INCR(sctps_badvtag);
4596 SCTP_TCB_UNLOCK(stcb);
4600 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4602 * If there is no stcb, skip the AUTH chunk and process
4603 * later after a stcb is found (to validate the lookup was
4606 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4608 (inp->auth_supported == 1)) {
4609 /* save this chunk for later processing */
4611 auth_offset = *offset;
4612 auth_len = ntohs(ch->chunk_length);
4614 /* (temporarily) move past this chunk */
4615 *offset += SCTP_SIZE32(auth_len);
4616 if (*offset >= length) {
4617 /* no more data left in the mbuf chain */
4621 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4622 sizeof(struct sctp_chunkhdr), chunk_buf);
4629 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4630 goto process_control_chunks;
4633 * first check if it's an ASCONF with an unknown src addr we
4634 * need to look inside to find the association
4636 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4637 struct sctp_chunkhdr *asconf_ch = ch;
4638 uint32_t asconf_offset = 0, asconf_len = 0;
4640 /* inp's refcount may be reduced */
4641 SCTP_INP_INCR_REF(inp);
4643 asconf_offset = *offset;
4645 asconf_len = ntohs(asconf_ch->chunk_length);
4646 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4648 stcb = sctp_findassociation_ep_asconf(m,
4651 sh, &inp, netp, vrf_id);
4654 asconf_offset += SCTP_SIZE32(asconf_len);
4655 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4656 sizeof(struct sctp_chunkhdr), chunk_buf);
4657 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4660 * reduce inp's refcount if not reduced in
4661 * sctp_findassociation_ep_asconf().
4663 SCTP_INP_DECR_REF(inp);
4666 /* now go back and verify any auth chunk to be sure */
4667 if (auth_skipped && (stcb != NULL)) {
4668 struct sctp_auth_chunk *auth;
4670 auth = (struct sctp_auth_chunk *)
4671 sctp_m_getptr(m, auth_offset,
4672 auth_len, chunk_buf);
4675 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4677 /* auth HMAC failed so dump it */
4681 /* remaining chunks are HMAC checked */
4682 stcb->asoc.authenticated = 1;
4687 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4688 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4690 /* no association, so it's out of the blue... */
4691 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4692 mflowtype, mflowid, inp->fibnum,
4698 /* ABORT and SHUTDOWN can use either v_tag... */
4699 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4700 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4701 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4702 /* Take the T-bit always into account. */
4703 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4704 (vtag_in == asoc->my_vtag)) ||
4705 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4706 (asoc->peer_vtag != htonl(0)) &&
4707 (vtag_in == asoc->peer_vtag))) {
4710 /* drop this packet... */
4711 SCTP_STAT_INCR(sctps_badvtag);
4713 SCTP_TCB_UNLOCK(stcb);
4717 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4718 if (vtag_in != asoc->my_vtag) {
4720 * this could be a stale SHUTDOWN-ACK or the
4721 * peer never got the SHUTDOWN-COMPLETE and
4722 * is still hung; we have started a new asoc
4723 * but it won't complete until the shutdown
4727 SCTP_TCB_UNLOCK(stcb);
4729 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4730 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4732 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4734 mflowtype, mflowid, fibnum,
4739 /* for all other chunks, vtag must match */
4740 if (vtag_in != asoc->my_vtag) {
4741 /* invalid vtag... */
4742 SCTPDBG(SCTP_DEBUG_INPUT3,
4743 "invalid vtag: %xh, expect %xh\n",
4744 vtag_in, asoc->my_vtag);
4745 SCTP_STAT_INCR(sctps_badvtag);
4747 SCTP_TCB_UNLOCK(stcb);
4753 } /* end if !SCTP_COOKIE_ECHO */
4755 * process all control chunks...
4757 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4758 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4759 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4760 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4761 /* implied cookie-ack.. we must have lost the ack */
4762 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4766 process_control_chunks:
4767 while (IS_SCTP_CONTROL(ch)) {
4768 /* validate chunk length */
4769 chk_length = ntohs(ch->chunk_length);
4770 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4771 ch->chunk_type, chk_length);
4772 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4773 if (chk_length < sizeof(*ch) ||
4774 (*offset + (int)chk_length) > length) {
4778 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4780 * INIT and INIT-ACK only gets the init ack "header" portion
4781 * only because we don't have to process the peer's COOKIE.
4782 * All others get a complete chunk.
4784 switch (ch->chunk_type) {
4785 case SCTP_INITIATION:
4786 contiguous = sizeof(struct sctp_init_chunk);
4788 case SCTP_INITIATION_ACK:
4789 contiguous = sizeof(struct sctp_init_ack_chunk);
4792 contiguous = min(chk_length, sizeof(chunk_buf));
4795 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4801 SCTP_TCB_UNLOCK(stcb);
4807 /* Save off the last place we got a control from */
4809 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4811 * allow last_control to be NULL if
4812 * ASCONF... ASCONF processing will find the
4815 if ((netp != NULL) && (*netp != NULL))
4816 stcb->asoc.last_control_chunk_from = *netp;
4819 #ifdef SCTP_AUDITING_ENABLED
4820 sctp_audit_log(0xB0, ch->chunk_type);
4823 /* check to see if this chunk required auth, but isn't */
4824 if ((stcb != NULL) &&
4825 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4826 !stcb->asoc.authenticated) {
4827 /* "silently" ignore */
4828 SCTP_STAT_INCR(sctps_recvauthmissing);
4831 switch (ch->chunk_type) {
4832 case SCTP_INITIATION:
4833 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4834 /* The INIT chunk must be the only chunk. */
4835 if ((num_chunks > 1) ||
4836 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4837 /* RFC 4960 requires that no ABORT is sent */
4840 SCTP_TCB_UNLOCK(stcb);
4844 /* Honor our resource limit. */
4845 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4846 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4847 sctp_abort_association(inp, stcb, m, iphlen,
4848 src, dst, sh, op_err,
4854 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4855 (struct sctp_init_chunk *)ch, inp,
4856 stcb, *netp, &abort_no_unlock,
4860 if ((!abort_no_unlock) && (stcb != NULL)) {
4861 SCTP_TCB_UNLOCK(stcb);
4865 case SCTP_PAD_CHUNK:
4867 case SCTP_INITIATION_ACK:
4868 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4869 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4870 /* We are not interested anymore */
4871 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4876 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4877 so = SCTP_INP_SO(inp);
4878 atomic_add_int(&stcb->asoc.refcnt, 1);
4879 SCTP_TCB_UNLOCK(stcb);
4880 SCTP_SOCKET_LOCK(so, 1);
4881 SCTP_TCB_LOCK(stcb);
4882 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4884 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4885 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4886 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4887 SCTP_SOCKET_UNLOCK(so, 1);
4893 /* The INIT-ACK chunk must be the only chunk. */
4894 if ((num_chunks > 1) ||
4895 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4899 if ((netp != NULL) && (*netp != NULL)) {
4900 ret = sctp_handle_init_ack(m, iphlen, *offset,
4902 (struct sctp_init_ack_chunk *)ch,
4911 if (abort_no_unlock) {
4915 * Special case, I must call the output routine to
4916 * get the cookie echoed
4918 if ((stcb != NULL) && (ret == 0)) {
4919 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4923 case SCTP_SELECTIVE_ACK:
4924 case SCTP_NR_SELECTIVE_ACK:
4927 uint32_t a_rwnd, cum_ack;
4928 uint16_t num_seg, num_nr_seg, num_dup;
4930 int offset_seg, offset_dup;
4932 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4933 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4934 SCTP_STAT_INCR(sctps_recvsacks);
4936 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4937 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4940 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4941 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4942 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4946 if (stcb->asoc.nrsack_supported == 0) {
4949 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4950 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4954 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4956 * If we have sent a shutdown-ack, we will pay no
4957 * attention to a sack sent in to us since
4958 * we don't care anymore.
4962 flags = ch->chunk_flags;
4963 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4964 struct sctp_sack_chunk *sack;
4966 sack = (struct sctp_sack_chunk *)ch;
4967 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4968 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4970 num_dup = ntohs(sack->sack.num_dup_tsns);
4971 a_rwnd = ntohl(sack->sack.a_rwnd);
4972 if (sizeof(struct sctp_sack_chunk) +
4973 num_seg * sizeof(struct sctp_gap_ack_block) +
4974 num_dup * sizeof(uint32_t) != chk_length) {
4975 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4978 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4979 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4981 struct sctp_nr_sack_chunk *nr_sack;
4983 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4984 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4985 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4986 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4987 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4988 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4989 if (sizeof(struct sctp_nr_sack_chunk) +
4990 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4991 num_dup * sizeof(uint32_t) != chk_length) {
4992 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4995 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4996 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4998 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4999 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
5000 cum_ack, num_seg, a_rwnd);
5001 stcb->asoc.seen_a_sack_this_pkt = 1;
5002 if ((stcb->asoc.pr_sctp_cnt == 0) &&
5003 (num_seg == 0) && (num_nr_seg == 0) &&
5004 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
5005 (stcb->asoc.saw_sack_with_frags == 0) &&
5006 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
5007 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
5009 * We have a SIMPLE sack having no
5010 * prior segments and data on sent
5011 * queue to be acked. Use the faster
5012 * path sack processing. We also
5013 * allow window update sacks with no
5014 * missing segments to go this way
5017 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
5018 &abort_now, ecne_seen);
5020 if ((netp != NULL) && (*netp != NULL)) {
5021 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
5022 num_seg, num_nr_seg, num_dup, &abort_now, flags,
5023 cum_ack, a_rwnd, ecne_seen);
5027 /* ABORT signal from sack processing */
5031 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
5032 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
5033 (stcb->asoc.stream_queue_cnt == 0)) {
5034 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
5038 case SCTP_HEARTBEAT_REQUEST:
5039 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
5040 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5041 SCTP_STAT_INCR(sctps_recvheartbeat);
5042 sctp_send_heartbeat_ack(stcb, m, *offset,
5046 case SCTP_HEARTBEAT_ACK:
5047 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
5048 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5053 SCTP_STAT_INCR(sctps_recvheartbeatack);
5054 if ((netp != NULL) && (*netp != NULL)) {
5055 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5059 case SCTP_ABORT_ASSOCIATION:
5060 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5063 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5064 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
5074 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5076 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5080 if ((netp != NULL) && (*netp != NULL)) {
5083 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5084 stcb, *netp, &abort_flag);
5091 case SCTP_SHUTDOWN_ACK:
5092 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
5093 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5094 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5099 case SCTP_OPERATION_ERROR:
5100 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
5101 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
5102 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
5107 case SCTP_COOKIE_ECHO:
5108 SCTPDBG(SCTP_DEBUG_INPUT3,
5109 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
5110 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
5113 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5114 /* We are not interested anymore */
5117 SCTP_TCB_UNLOCK(stcb);
5124 * First are we accepting? We do this again here
5125 * since it is possible that a previous endpoint WAS
5126 * listening responded to a INIT-ACK and then
5127 * closed. We opened and bound.. and are now no
5131 if ((stcb == NULL) && (inp->sctp_socket->so_qlen >= inp->sctp_socket->so_qlimit)) {
5132 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5133 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5134 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5135 sctp_abort_association(inp, stcb, m, iphlen,
5136 src, dst, sh, op_err,
5143 struct mbuf *ret_buf;
5144 struct sctp_inpcb *linp;
5153 SCTP_ASOC_CREATE_LOCK(linp);
5154 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5155 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5156 SCTP_ASOC_CREATE_UNLOCK(linp);
5162 struct sctp_tcb *locked_stcb;
5166 sctp_handle_cookie_echo(m, iphlen,
5170 (struct sctp_cookie_echo_chunk *)ch,
5180 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
5181 SCTP_TCB_UNLOCK(locked_stcb);
5184 SCTP_TCB_LOCK_ASSERT(stcb);
5190 SCTP_ASOC_CREATE_UNLOCK(linp);
5192 if (ret_buf == NULL) {
5194 SCTP_TCB_UNLOCK(stcb);
5196 SCTPDBG(SCTP_DEBUG_INPUT3,
5197 "GAK, null buffer\n");
5201 /* if AUTH skipped, see if it verified... */
5206 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
5208 * Restart the timer if we have
5211 struct sctp_tmit_chunk *chk;
5213 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
5214 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5218 case SCTP_COOKIE_ACK:
5219 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
5220 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5223 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5224 /* We are not interested anymore */
5225 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5228 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5229 so = SCTP_INP_SO(inp);
5230 atomic_add_int(&stcb->asoc.refcnt, 1);
5231 SCTP_TCB_UNLOCK(stcb);
5232 SCTP_SOCKET_LOCK(so, 1);
5233 SCTP_TCB_LOCK(stcb);
5234 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5236 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5237 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
5238 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5239 SCTP_SOCKET_UNLOCK(so, 1);
5245 if ((netp != NULL) && (*netp != NULL)) {
5246 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5250 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
5251 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5256 if (stcb->asoc.ecn_supported == 0) {
5259 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5263 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5264 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5268 if (stcb->asoc.ecn_supported == 0) {
5271 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5273 case SCTP_SHUTDOWN_COMPLETE:
5274 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5275 /* must be first and only chunk */
5276 if ((num_chunks > 1) ||
5277 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5281 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5282 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5289 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5291 if (stcb->asoc.asconf_supported == 0) {
5294 sctp_handle_asconf(m, *offset, src,
5295 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5299 case SCTP_ASCONF_ACK:
5300 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5301 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5306 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5307 if (stcb->asoc.asconf_supported == 0) {
5310 /* He's alive so give him credit */
5311 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5312 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5313 stcb->asoc.overall_error_count,
5315 SCTP_FROM_SCTP_INPUT,
5318 stcb->asoc.overall_error_count = 0;
5319 sctp_handle_asconf_ack(m, *offset,
5320 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5321 if (abort_no_unlock)
5325 case SCTP_FORWARD_CUM_TSN:
5326 case SCTP_IFORWARD_CUM_TSN:
5327 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD_TSN\n");
5328 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5337 if (stcb->asoc.prsctp_supported == 0) {
5341 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5342 /* We are not interested anymore */
5343 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5344 so = SCTP_INP_SO(inp);
5345 atomic_add_int(&stcb->asoc.refcnt, 1);
5346 SCTP_TCB_UNLOCK(stcb);
5347 SCTP_SOCKET_LOCK(so, 1);
5348 SCTP_TCB_LOCK(stcb);
5349 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5351 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5352 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5353 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5354 SCTP_SOCKET_UNLOCK(so, 1);
5360 * For sending a SACK this looks like DATA
5363 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5364 sctp_handle_forward_tsn(stcb,
5365 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5372 case SCTP_STREAM_RESET:
5373 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5374 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5379 if (stcb->asoc.reconfig_supported == 0) {
5382 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5383 /* stop processing */
5388 case SCTP_PACKET_DROPPED:
5389 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5390 /* re-get it all please */
5391 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5397 if ((ch != NULL) && (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5398 if (stcb->asoc.pktdrop_supported == 0) {
5401 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5403 min(chk_length, contiguous));
5406 case SCTP_AUTHENTICATION:
5407 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5409 /* save the first AUTH for later processing */
5410 if (auth_skipped == 0) {
5411 auth_offset = *offset;
5412 auth_len = chk_length;
5415 /* skip this chunk (temporarily) */
5418 if (stcb->asoc.auth_supported == 0) {
5421 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5422 (chk_length > (sizeof(struct sctp_auth_chunk) +
5423 SCTP_AUTH_DIGEST_LEN_MAX))) {
5428 if (got_auth == 1) {
5429 /* skip this chunk... it's already auth'd */
5433 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5435 /* auth HMAC failed so dump the packet */
5439 /* remaining chunks are HMAC checked */
5440 stcb->asoc.authenticated = 1;
5446 /* it's an unknown chunk! */
5447 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5448 struct sctp_gen_error_cause *cause;
5451 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5452 0, M_NOWAIT, 1, MT_DATA);
5453 if (op_err != NULL) {
5454 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5455 cause = mtod(op_err, struct sctp_gen_error_cause *);
5456 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5457 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5458 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5459 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5460 if (SCTP_BUF_NEXT(op_err) != NULL) {
5461 #ifdef SCTP_MBUF_LOGGING
5462 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5463 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5466 sctp_queue_op_err(stcb, op_err);
5468 sctp_m_freem(op_err);
5472 if ((ch->chunk_type & 0x80) == 0) {
5473 /* discard this packet */
5476 } /* else skip this bad chunk and continue... */
5478 } /* switch (ch->chunk_type) */
5482 /* get the next chunk */
5483 *offset += SCTP_SIZE32(chk_length);
5484 if (*offset >= length) {
5485 /* no more data left in the mbuf chain */
5488 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5489 sizeof(struct sctp_chunkhdr), chunk_buf);
5496 if ((asconf_cnt > 0) && (stcb != NULL)) {
5497 sctp_send_asconf_ack(stcb);
5504 * common input chunk processing (v4 and v6)
5507 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5508 struct sockaddr *src, struct sockaddr *dst,
5509 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5510 uint8_t compute_crc,
5512 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5513 uint32_t vrf_id, uint16_t port)
5516 int fwd_tsn_seen = 0, data_processed = 0;
5517 struct mbuf *m = *mm, *op_err;
5518 char msg[SCTP_DIAG_INFO_LEN];
5520 int cnt_ctrl_ready = 0;
5521 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5522 struct sctp_tcb *stcb = NULL;
5523 struct sctp_nets *net = NULL;
5525 SCTP_STAT_INCR(sctps_recvdatagrams);
5526 #ifdef SCTP_AUDITING_ENABLED
5527 sctp_audit_log(0xE0, 1);
5528 sctp_auditing(0, inp, stcb, net);
5530 if (compute_crc != 0) {
5531 uint32_t check, calc_check;
5533 check = sh->checksum;
5535 calc_check = sctp_calculate_cksum(m, iphlen);
5536 sh->checksum = check;
5537 if (calc_check != check) {
5538 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5539 calc_check, check, (void *)m, length, iphlen);
5540 stcb = sctp_findassociation_addr(m, offset, src, dst,
5541 sh, ch, &inp, &net, vrf_id);
5542 #if defined(INET) || defined(INET6)
5543 if ((ch->chunk_type != SCTP_INITIATION) &&
5544 (net != NULL) && (net->port != port)) {
5545 if (net->port == 0) {
5546 /* UDP encapsulation turned on. */
5547 net->mtu -= sizeof(struct udphdr);
5548 if (stcb->asoc.smallest_mtu > net->mtu) {
5549 sctp_pathmtu_adjustment(stcb, net->mtu);
5551 } else if (port == 0) {
5552 /* UDP encapsulation turned off. */
5553 net->mtu += sizeof(struct udphdr);
5554 /* XXX Update smallest_mtu */
5560 net->flowtype = mflowtype;
5561 net->flowid = mflowid;
5563 if ((inp != NULL) && (stcb != NULL)) {
5564 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5565 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5566 } else if ((inp != NULL) && (stcb == NULL)) {
5569 SCTP_STAT_INCR(sctps_badsum);
5570 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5574 /* Destination port of 0 is illegal, based on RFC4960. */
5575 if (sh->dest_port == 0) {
5576 SCTP_STAT_INCR(sctps_hdrops);
5579 stcb = sctp_findassociation_addr(m, offset, src, dst,
5580 sh, ch, &inp, &net, vrf_id);
5581 #if defined(INET) || defined(INET6)
5582 if ((ch->chunk_type != SCTP_INITIATION) &&
5583 (net != NULL) && (net->port != port)) {
5584 if (net->port == 0) {
5585 /* UDP encapsulation turned on. */
5586 net->mtu -= sizeof(struct udphdr);
5587 if (stcb->asoc.smallest_mtu > net->mtu) {
5588 sctp_pathmtu_adjustment(stcb, net->mtu);
5590 } else if (port == 0) {
5591 /* UDP encapsulation turned off. */
5592 net->mtu += sizeof(struct udphdr);
5593 /* XXX Update smallest_mtu */
5599 net->flowtype = mflowtype;
5600 net->flowid = mflowid;
5603 SCTP_STAT_INCR(sctps_noport);
5604 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5607 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5608 sctp_send_shutdown_complete2(src, dst, sh,
5609 mflowtype, mflowid, fibnum,
5613 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5616 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5617 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5618 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5619 (ch->chunk_type != SCTP_INIT))) {
5620 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5622 sctp_send_abort(m, iphlen, src, dst,
5624 mflowtype, mflowid, fibnum,
5629 } else if (stcb == NULL) {
5632 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5633 (void *)m, iphlen, offset, length, (void *)stcb);
5635 /* always clear this before beginning a packet */
5636 stcb->asoc.authenticated = 0;
5637 stcb->asoc.seen_a_sack_this_pkt = 0;
5638 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5639 (void *)stcb, stcb->asoc.state);
5641 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5642 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5644 * If we hit here, we had a ref count
5645 * up when the assoc was aborted and the
5646 * timer is clearing out the assoc, we should
5647 * NOT respond to any packet.. its OOTB.
5649 SCTP_TCB_UNLOCK(stcb);
5651 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5652 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5654 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5655 mflowtype, mflowid, inp->fibnum,
5661 if (IS_SCTP_CONTROL(ch)) {
5662 /* process the control portion of the SCTP packet */
5663 /* sa_ignore NO_NULL_CHK */
5664 stcb = sctp_process_control(m, iphlen, &offset, length,
5666 inp, stcb, &net, &fwd_tsn_seen,
5667 mflowtype, mflowid, fibnum,
5671 * This covers us if the cookie-echo was there and
5672 * it changes our INP.
5674 inp = stcb->sctp_ep;
5675 #if defined(INET) || defined(INET6)
5676 if ((ch->chunk_type != SCTP_INITIATION) &&
5677 (net != NULL) && (net->port != port)) {
5678 if (net->port == 0) {
5679 /* UDP encapsulation turned on. */
5680 net->mtu -= sizeof(struct udphdr);
5681 if (stcb->asoc.smallest_mtu > net->mtu) {
5682 sctp_pathmtu_adjustment(stcb, net->mtu);
5684 } else if (port == 0) {
5685 /* UDP encapsulation turned off. */
5686 net->mtu += sizeof(struct udphdr);
5687 /* XXX Update smallest_mtu */
5695 * no control chunks, so pre-process DATA chunks (these
5696 * checks are taken care of by control processing)
5700 * if DATA only packet, and auth is required, then punt...
5701 * can't have authenticated without any AUTH (control)
5704 if ((stcb != NULL) &&
5705 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5706 /* "silently" ignore */
5707 SCTP_STAT_INCR(sctps_recvauthmissing);
5711 /* out of the blue DATA chunk */
5712 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5713 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5715 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5716 mflowtype, mflowid, fibnum,
5720 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5721 /* v_tag mismatch! */
5722 SCTP_STAT_INCR(sctps_badvtag);
5729 * no valid TCB for this packet, or we found it's a bad
5730 * packet while processing control, or we're done with this
5731 * packet (done or skip rest of data), so we drop it...
5737 * DATA chunk processing
5739 /* plow through the data chunks while length > offset */
5742 * Rest should be DATA only. Check authentication state if AUTH for
5745 if ((length > offset) &&
5747 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5748 !stcb->asoc.authenticated) {
5749 /* "silently" ignore */
5750 SCTP_STAT_INCR(sctps_recvauthmissing);
5751 SCTPDBG(SCTP_DEBUG_AUTH1,
5752 "Data chunk requires AUTH, skipped\n");
5755 if (length > offset) {
5759 * First check to make sure our state is correct. We would
5760 * not get here unless we really did have a tag, so we don't
5761 * abort if this happens, just dump the chunk silently.
5763 switch (SCTP_GET_STATE(stcb)) {
5764 case SCTP_STATE_COOKIE_ECHOED:
5766 * we consider data with valid tags in this state
5767 * shows us the cookie-ack was lost. Imply it was
5770 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5772 case SCTP_STATE_COOKIE_WAIT:
5774 * We consider OOTB any data sent during asoc setup.
5776 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5777 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5779 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5780 mflowtype, mflowid, inp->fibnum,
5783 /* sa_ignore NOTREACHED */
5785 case SCTP_STATE_EMPTY: /* should not happen */
5786 case SCTP_STATE_INUSE: /* should not happen */
5787 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5788 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5791 /* sa_ignore NOTREACHED */
5793 case SCTP_STATE_OPEN:
5794 case SCTP_STATE_SHUTDOWN_SENT:
5797 /* plow through the data chunks while length > offset */
5798 retval = sctp_process_data(mm, iphlen, &offset, length,
5799 inp, stcb, net, &high_tsn);
5802 * The association aborted, NO UNLOCK needed since
5803 * the association is destroyed.
5810 * Anything important needs to have been m_copy'ed in
5815 /* take care of ecn */
5816 if ((data_processed == 1) &&
5817 (stcb->asoc.ecn_supported == 1) &&
5818 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5819 /* Yep, we need to add a ECNE */
5820 sctp_send_ecn_echo(stcb, net, high_tsn);
5823 if ((data_processed == 0) && (fwd_tsn_seen)) {
5825 uint32_t highest_tsn;
5827 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5828 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5830 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5832 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5833 stcb->asoc.send_sack = 1;
5834 sctp_sack_check(stcb, was_a_gap);
5835 } else if (fwd_tsn_seen) {
5836 stcb->asoc.send_sack = 1;
5838 /* trigger send of any chunks in queue... */
5840 #ifdef SCTP_AUDITING_ENABLED
5841 sctp_audit_log(0xE0, 2);
5842 sctp_auditing(1, inp, stcb, net);
5844 SCTPDBG(SCTP_DEBUG_INPUT1,
5845 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5846 stcb->asoc.peers_rwnd,
5847 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5848 stcb->asoc.total_flight);
5849 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5850 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5851 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5853 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5855 stcb->asoc.trigger_reset ||
5857 (stcb->asoc.peers_rwnd > 0 ||
5858 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
5859 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5860 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5861 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5863 #ifdef SCTP_AUDITING_ENABLED
5864 sctp_audit_log(0xE0, 3);
5865 sctp_auditing(2, inp, stcb, net);
5869 SCTP_TCB_UNLOCK(stcb);
5871 if (inp_decr != NULL) {
5872 /* reduce ref-count */
5873 SCTP_INP_WLOCK(inp_decr);
5874 SCTP_INP_DECR_REF(inp_decr);
5875 SCTP_INP_WUNLOCK(inp_decr);
5882 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5886 uint32_t vrf_id = 0;
5888 struct sockaddr_in src, dst;
5891 struct sctp_chunkhdr *ch;
5893 uint8_t compute_crc;
5899 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5900 SCTP_RELEASE_PKT(i_pak);
5903 m = SCTP_HEADER_TO_CHAIN(i_pak);
5904 #ifdef SCTP_MBUF_LOGGING
5905 /* Log in any input mbufs */
5906 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5907 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5910 #ifdef SCTP_PACKET_LOGGING
5911 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5915 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5916 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5918 if_name(m->m_pkthdr.rcvif),
5919 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5920 mflowid = m->m_pkthdr.flowid;
5921 mflowtype = M_HASHTYPE_GET(m);
5922 fibnum = M_GETFIB(m);
5923 SCTP_STAT_INCR(sctps_recvpackets);
5924 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5925 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5926 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5927 if (SCTP_BUF_LEN(m) < offset) {
5928 if ((m = m_pullup(m, offset)) == NULL) {
5929 SCTP_STAT_INCR(sctps_hdrops);
5933 ip = mtod(m, struct ip *);
5934 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5935 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5936 offset -= sizeof(struct sctp_chunkhdr);
5937 memset(&src, 0, sizeof(struct sockaddr_in));
5938 src.sin_family = AF_INET;
5939 src.sin_len = sizeof(struct sockaddr_in);
5940 src.sin_port = sh->src_port;
5941 src.sin_addr = ip->ip_src;
5942 memset(&dst, 0, sizeof(struct sockaddr_in));
5943 dst.sin_family = AF_INET;
5944 dst.sin_len = sizeof(struct sockaddr_in);
5945 dst.sin_port = sh->dest_port;
5946 dst.sin_addr = ip->ip_dst;
5947 length = ntohs(ip->ip_len);
5948 /* Validate mbuf chain length with IP payload length. */
5949 if (SCTP_HEADER_LEN(m) != length) {
5950 SCTPDBG(SCTP_DEBUG_INPUT1,
5951 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5952 SCTP_STAT_INCR(sctps_hdrops);
5955 /* SCTP does not allow broadcasts or multicasts */
5956 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5959 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5962 ecn_bits = ip->ip_tos;
5963 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5964 SCTP_STAT_INCR(sctps_recvhwcrc);
5967 SCTP_STAT_INCR(sctps_recvswcrc);
5970 sctp_common_input_processing(&m, iphlen, offset, length,
5971 (struct sockaddr *)&src,
5972 (struct sockaddr *)&dst,
5976 mflowtype, mflowid, fibnum,
5985 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5986 extern int *sctp_cpuarry;
5990 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5997 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6003 uint32_t flowid, tag;
6005 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
6006 flowid = m->m_pkthdr.flowid;
6009 * No flow id built by lower layers fix it so we
6012 offset = off + sizeof(struct sctphdr);
6013 if (SCTP_BUF_LEN(m) < offset) {
6014 if ((m = m_pullup(m, offset)) == NULL) {
6015 SCTP_STAT_INCR(sctps_hdrops);
6016 return (IPPROTO_DONE);
6019 ip = mtod(m, struct ip *);
6020 sh = (struct sctphdr *)((caddr_t)ip + off);
6021 tag = htonl(sh->v_tag);
6022 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6023 m->m_pkthdr.flowid = flowid;
6024 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
6026 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6027 sctp_queue_to_mcore(m, off, cpu_to_use);
6028 return (IPPROTO_DONE);
6031 sctp_input_with_port(m, off, 0);
6032 return (IPPROTO_DONE);