sctp_input.c revision 171440
1163953Srrs/*- 2169382Srrs * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3163953Srrs * 4163953Srrs * Redistribution and use in source and binary forms, with or without 5163953Srrs * modification, are permitted provided that the following conditions are met: 6163953Srrs * 7163953Srrs * a) Redistributions of source code must retain the above copyright notice, 8163953Srrs * this list of conditions and the following disclaimer. 9163953Srrs * 10163953Srrs * b) Redistributions in binary form must reproduce the above copyright 11163953Srrs * notice, this list of conditions and the following disclaimer in 12163953Srrs * the documentation and/or other materials provided with the distribution. 13163953Srrs * 14163953Srrs * c) Neither the name of Cisco Systems, Inc. nor the names of its 15163953Srrs * contributors may be used to endorse or promote products derived 16163953Srrs * from this software without specific prior written permission. 17163953Srrs * 18163953Srrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19163953Srrs * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20163953Srrs * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21163953Srrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22163953Srrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23163953Srrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24163953Srrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25163953Srrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26163953Srrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27163953Srrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28163953Srrs * THE POSSIBILITY OF SUCH DAMAGE. 29163953Srrs */ 30163953Srrs 31163953Srrs/* $KAME: sctp_input.c,v 1.27 2005/03/06 16:04:17 itojun Exp $ */ 32163953Srrs 33163953Srrs#include <sys/cdefs.h> 34163953Srrs__FBSDID("$FreeBSD: head/sys/netinet/sctp_input.c 171440 2007-07-14 09:36:28Z rrs $"); 35163953Srrs 36163953Srrs#include <netinet/sctp_os.h> 37163953Srrs#include <netinet/sctp_var.h> 38167598Srrs#include <netinet/sctp_sysctl.h> 39163953Srrs#include <netinet/sctp_pcb.h> 40163953Srrs#include <netinet/sctp_header.h> 41163953Srrs#include <netinet/sctputil.h> 42163953Srrs#include <netinet/sctp_output.h> 43163953Srrs#include <netinet/sctp_input.h> 44163953Srrs#include <netinet/sctp_auth.h> 45163953Srrs#include <netinet/sctp_indata.h> 46163953Srrs#include <netinet/sctp_asconf.h> 47170091Srrs#include <netinet/sctp_bsd_addr.h> 48163953Srrs 49163953Srrs 50163953Srrs 51163953Srrsstatic void 52163953Srrssctp_stop_all_cookie_timers(struct sctp_tcb *stcb) 53163953Srrs{ 54163953Srrs struct sctp_nets *net; 55163953Srrs 56165220Srrs /* 57165220Srrs * This now not only stops all cookie timers it also stops any INIT 58165220Srrs * timers as well. This will make sure that the timers are stopped 59165220Srrs * in all collision cases. 60165220Srrs */ 61163953Srrs SCTP_TCB_LOCK_ASSERT(stcb); 62163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 63165220Srrs if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) { 64163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE, 65163953Srrs stcb->sctp_ep, 66163953Srrs stcb, 67165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1); 68165220Srrs } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) { 69165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, 70165220Srrs stcb->sctp_ep, 71165220Srrs stcb, 72165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2); 73163953Srrs } 74163953Srrs } 75163953Srrs} 76163953Srrs 77163953Srrs/* INIT handler */ 78163953Srrsstatic void 79163953Srrssctp_handle_init(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, 80163953Srrs struct sctp_init_chunk *cp, struct sctp_inpcb *inp, struct sctp_tcb *stcb, 81170181Srrs struct sctp_nets *net, int *abort_no_unlock, uint32_t vrf_id) 82163953Srrs{ 83163953Srrs struct sctp_init *init; 84163953Srrs struct mbuf *op_err; 85163953Srrs uint32_t init_limit; 86163953Srrs 87169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n", 88169420Srrs stcb); 89163953Srrs op_err = NULL; 90163953Srrs init = &cp->init; 91163953Srrs /* First are we accepting? */ 92163953Srrs if ((inp->sctp_socket->so_qlimit == 0) && (stcb == NULL)) { 93169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 94169420Srrs "sctp_handle_init: Abort, so_qlimit:%d\n", 95169420Srrs inp->sctp_socket->so_qlimit); 96163953Srrs /* 97163953Srrs * FIX ME ?? What about TCP model and we have a 98163953Srrs * match/restart case? 99163953Srrs */ 100169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 101170181Srrs vrf_id); 102168299Srrs if (stcb) 103168299Srrs *abort_no_unlock = 1; 104163953Srrs return; 105163953Srrs } 106163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) { 107163953Srrs /* Invalid length */ 108163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 109169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 110170181Srrs vrf_id); 111168299Srrs if (stcb) 112168299Srrs *abort_no_unlock = 1; 113163953Srrs return; 114163953Srrs } 115163953Srrs /* validate parameters */ 116163953Srrs if (init->initiate_tag == 0) { 117163953Srrs /* protocol error... send abort */ 118163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 119169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 120170181Srrs vrf_id); 121168299Srrs if (stcb) 122168299Srrs *abort_no_unlock = 1; 123163953Srrs return; 124163953Srrs } 125163953Srrs if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) { 126163953Srrs /* invalid parameter... send abort */ 127163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 128169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 129170181Srrs vrf_id); 130171440Srrs if (stcb) 131171440Srrs *abort_no_unlock = 1; 132163953Srrs return; 133163953Srrs } 134163953Srrs if (init->num_inbound_streams == 0) { 135163953Srrs /* protocol error... send abort */ 136163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 137169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 138170181Srrs vrf_id); 139168299Srrs if (stcb) 140168299Srrs *abort_no_unlock = 1; 141163953Srrs return; 142163953Srrs } 143163953Srrs if (init->num_outbound_streams == 0) { 144163953Srrs /* protocol error... send abort */ 145163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 146169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 147170181Srrs vrf_id); 148168299Srrs if (stcb) 149168299Srrs *abort_no_unlock = 1; 150163953Srrs return; 151163953Srrs } 152163953Srrs init_limit = offset + ntohs(cp->ch.chunk_length); 153163953Srrs if (sctp_validate_init_auth_params(m, offset + sizeof(*cp), 154163953Srrs init_limit)) { 155163953Srrs /* auth parameter(s) error... send abort */ 156170181Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, NULL, vrf_id); 157168299Srrs if (stcb) 158168299Srrs *abort_no_unlock = 1; 159163953Srrs return; 160163953Srrs } 161163953Srrs /* send an INIT-ACK w/cookie */ 162169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n"); 163170181Srrs sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, sh, cp, vrf_id); 164163953Srrs} 165163953Srrs 166163953Srrs/* 167163953Srrs * process peer "INIT/INIT-ACK" chunk returns value < 0 on error 168163953Srrs */ 169171158Srrs 170171158Srrsint 171171158Srrssctp_is_there_unsent_data(struct sctp_tcb *stcb) 172171158Srrs{ 173171158Srrs int unsent_data = 0; 174171158Srrs struct sctp_stream_queue_pending *sp; 175171158Srrs struct sctp_stream_out *strq; 176171158Srrs struct sctp_association *asoc; 177171158Srrs 178171158Srrs /* 179171158Srrs * This function returns the number of streams that have true unsent 180171158Srrs * data on them. Note that as it looks through it will clean up any 181171158Srrs * places that have old data that has been sent but left at top of 182171158Srrs * stream queue. 183171158Srrs */ 184171158Srrs asoc = &stcb->asoc; 185171158Srrs SCTP_TCB_SEND_LOCK(stcb); 186171158Srrs if (!TAILQ_EMPTY(&asoc->out_wheel)) { 187171158Srrs /* Check to see if some data queued */ 188171158Srrs TAILQ_FOREACH(strq, &asoc->out_wheel, next_spoke) { 189171158Srrs /* sa_ignore FREED_MEMORY */ 190171158Srrs is_there_another: 191171158Srrs sp = TAILQ_FIRST(&strq->outqueue); 192171158Srrs if (sp == NULL) { 193171158Srrs continue; 194171158Srrs } 195171158Srrs if ((sp->msg_is_complete) && 196171158Srrs (sp->length == 0) && 197171158Srrs (sp->sender_all_done)) { 198171158Srrs /* 199171158Srrs * We are doing differed cleanup. Last time 200171158Srrs * through when we took all the data the 201171158Srrs * sender_all_done was not set. 202171158Srrs */ 203171158Srrs if (sp->put_last_out == 0) { 204171158Srrs SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n"); 205171158Srrs SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n", 206171158Srrs sp->sender_all_done, 207171158Srrs sp->length, 208171158Srrs sp->msg_is_complete, 209171158Srrs sp->put_last_out); 210171158Srrs } 211171158Srrs atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1); 212171158Srrs TAILQ_REMOVE(&strq->outqueue, sp, next); 213171158Srrs sctp_free_remote_addr(sp->net); 214171158Srrs if (sp->data) { 215171158Srrs sctp_m_freem(sp->data); 216171158Srrs sp->data = NULL; 217171158Srrs } 218171158Srrs sctp_free_a_strmoq(stcb, sp); 219171158Srrs goto is_there_another; 220171158Srrs } else { 221171158Srrs unsent_data++; 222171158Srrs continue; 223171158Srrs } 224171158Srrs } 225171158Srrs } 226171158Srrs SCTP_TCB_SEND_UNLOCK(stcb); 227171158Srrs return (unsent_data); 228171158Srrs} 229171158Srrs 230163953Srrsstatic int 231163953Srrssctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb, 232163953Srrs struct sctp_nets *net) 233163953Srrs{ 234163953Srrs struct sctp_init *init; 235163953Srrs struct sctp_association *asoc; 236163953Srrs struct sctp_nets *lnet; 237163953Srrs unsigned int i; 238163953Srrs 239163953Srrs init = &cp->init; 240163953Srrs asoc = &stcb->asoc; 241163953Srrs /* save off parameters */ 242163953Srrs asoc->peer_vtag = ntohl(init->initiate_tag); 243163953Srrs asoc->peers_rwnd = ntohl(init->a_rwnd); 244163953Srrs if (TAILQ_FIRST(&asoc->nets)) { 245163953Srrs /* update any ssthresh's that may have a default */ 246163953Srrs TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 247163953Srrs lnet->ssthresh = asoc->peers_rwnd; 248163953Srrs 249170744Srrs if (sctp_logging_level & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) { 250170744Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION); 251170744Srrs } 252163953Srrs } 253163953Srrs } 254164181Srrs SCTP_TCB_SEND_LOCK(stcb); 255163953Srrs if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) { 256163953Srrs unsigned int newcnt; 257163953Srrs struct sctp_stream_out *outs; 258163953Srrs struct sctp_stream_queue_pending *sp; 259163953Srrs 260163953Srrs /* cut back on number of streams */ 261163953Srrs newcnt = ntohs(init->num_inbound_streams); 262163953Srrs /* This if is probably not needed but I am cautious */ 263163953Srrs if (asoc->strmout) { 264163953Srrs /* First make sure no data chunks are trapped */ 265163953Srrs for (i = newcnt; i < asoc->pre_open_streams; i++) { 266163953Srrs outs = &asoc->strmout[i]; 267163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 268163953Srrs while (sp) { 269163953Srrs TAILQ_REMOVE(&outs->outqueue, sp, 270163953Srrs next); 271163953Srrs asoc->stream_queue_cnt--; 272163953Srrs sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, 273163953Srrs stcb, SCTP_NOTIFY_DATAGRAM_UNSENT, 274163953Srrs sp); 275163953Srrs if (sp->data) { 276163953Srrs sctp_m_freem(sp->data); 277163953Srrs sp->data = NULL; 278163953Srrs } 279163953Srrs sctp_free_remote_addr(sp->net); 280163953Srrs sp->net = NULL; 281163953Srrs /* Free the chunk */ 282169420Srrs SCTP_PRINTF("sp:%p tcb:%p weird free case\n", 283163979Sru sp, stcb); 284163953Srrs 285163953Srrs sctp_free_a_strmoq(stcb, sp); 286169655Srrs /* sa_ignore FREED_MEMORY */ 287163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 288163953Srrs } 289163953Srrs } 290163953Srrs } 291163953Srrs /* cut back the count and abandon the upper streams */ 292163953Srrs asoc->pre_open_streams = newcnt; 293163953Srrs } 294164181Srrs SCTP_TCB_SEND_UNLOCK(stcb); 295163953Srrs asoc->streamoutcnt = asoc->pre_open_streams; 296163953Srrs /* init tsn's */ 297163953Srrs asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1; 298170744Srrs if (sctp_logging_level & SCTP_MAP_LOGGING_ENABLE) { 299170744Srrs sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 300170744Srrs } 301163953Srrs /* This is the next one we expect */ 302163953Srrs asoc->str_reset_seq_in = asoc->asconf_seq_in + 1; 303163953Srrs 304163953Srrs asoc->mapping_array_base_tsn = ntohl(init->initial_tsn); 305163953Srrs asoc->cumulative_tsn = asoc->asconf_seq_in; 306163953Srrs asoc->last_echo_tsn = asoc->asconf_seq_in; 307163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 308163953Srrs /* open the requested streams */ 309170091Srrs 310163953Srrs if (asoc->strmin != NULL) { 311163953Srrs /* Free the old ones */ 312164181Srrs struct sctp_queued_to_read *ctl; 313164181Srrs 314164181Srrs for (i = 0; i < asoc->streamincnt; i++) { 315164181Srrs ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 316164181Srrs while (ctl) { 317164181Srrs TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 318164181Srrs sctp_free_remote_addr(ctl->whoFrom); 319171158Srrs ctl->whoFrom = NULL; 320164181Srrs sctp_m_freem(ctl->data); 321164181Srrs ctl->data = NULL; 322164181Srrs sctp_free_a_readq(stcb, ctl); 323164181Srrs ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 324164181Srrs } 325164181Srrs } 326170091Srrs SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 327163953Srrs } 328164181Srrs asoc->streamincnt = ntohs(init->num_outbound_streams); 329164181Srrs if (asoc->streamincnt > MAX_SCTP_STREAMS) { 330164181Srrs asoc->streamincnt = MAX_SCTP_STREAMS; 331164181Srrs } 332163953Srrs SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt * 333170091Srrs sizeof(struct sctp_stream_in), SCTP_M_STRMI); 334163953Srrs if (asoc->strmin == NULL) { 335163953Srrs /* we didn't get memory for the streams! */ 336169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n"); 337163953Srrs return (-1); 338163953Srrs } 339163953Srrs for (i = 0; i < asoc->streamincnt; i++) { 340163953Srrs asoc->strmin[i].stream_no = i; 341163953Srrs asoc->strmin[i].last_sequence_delivered = 0xffff; 342163953Srrs /* 343163953Srrs * U-stream ranges will be set when the cookie is unpacked. 344163953Srrs * Or for the INIT sender they are un set (if pr-sctp not 345163953Srrs * supported) when the INIT-ACK arrives. 346163953Srrs */ 347163953Srrs TAILQ_INIT(&asoc->strmin[i].inqueue); 348168943Srrs asoc->strmin[i].delivery_started = 0; 349163953Srrs } 350163953Srrs /* 351163953Srrs * load_address_from_init will put the addresses into the 352163953Srrs * association when the COOKIE is processed or the INIT-ACK is 353163953Srrs * processed. Both types of COOKIE's existing and new call this 354163953Srrs * routine. It will remove addresses that are no longer in the 355163953Srrs * association (for the restarting case where addresses are 356163953Srrs * removed). Up front when the INIT arrives we will discard it if it 357163953Srrs * is a restart and new addresses have been added. 358163953Srrs */ 359169655Srrs /* sa_ignore MEMLEAK */ 360163953Srrs return (0); 361163953Srrs} 362163953Srrs 363163953Srrs/* 364163953Srrs * INIT-ACK message processing/consumption returns value < 0 on error 365163953Srrs */ 366163953Srrsstatic int 367163953Srrssctp_process_init_ack(struct mbuf *m, int iphlen, int offset, 368163953Srrs struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 369170181Srrs struct sctp_nets *net, int *abort_no_unlock, uint32_t vrf_id) 370163953Srrs{ 371163953Srrs struct sctp_association *asoc; 372163953Srrs struct mbuf *op_err; 373163953Srrs int retval, abort_flag; 374163953Srrs uint32_t initack_limit; 375163953Srrs 376163953Srrs /* First verify that we have no illegal param's */ 377163953Srrs abort_flag = 0; 378163953Srrs op_err = NULL; 379163953Srrs 380163953Srrs op_err = sctp_arethere_unrecognized_parameters(m, 381163953Srrs (offset + sizeof(struct sctp_init_chunk)), 382163953Srrs &abort_flag, (struct sctp_chunkhdr *)cp); 383163953Srrs if (abort_flag) { 384163953Srrs /* Send an abort and notify peer */ 385170056Srrs sctp_abort_an_association(stcb->sctp_ep, stcb, SCTP_CAUSE_PROTOCOL_VIOLATION, op_err); 386170056Srrs *abort_no_unlock = 1; 387163953Srrs return (-1); 388163953Srrs } 389163953Srrs asoc = &stcb->asoc; 390163953Srrs /* process the peer's parameters in the INIT-ACK */ 391163953Srrs retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb, net); 392163953Srrs if (retval < 0) { 393163953Srrs return (retval); 394163953Srrs } 395163953Srrs initack_limit = offset + ntohs(cp->ch.chunk_length); 396163953Srrs /* load all addresses */ 397163953Srrs if ((retval = sctp_load_addresses_from_init(stcb, m, iphlen, 398163953Srrs (offset + sizeof(struct sctp_init_chunk)), initack_limit, sh, 399163953Srrs NULL))) { 400163953Srrs /* Huh, we should abort */ 401169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 402169420Srrs "Load addresses from INIT causes an abort %d\n", 403169420Srrs retval); 404163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 405170181Srrs NULL, 0); 406168299Srrs *abort_no_unlock = 1; 407163953Srrs return (-1); 408163953Srrs } 409163953Srrs stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs, 410163953Srrs stcb->asoc.local_hmacs); 411163953Srrs if (op_err) { 412163953Srrs sctp_queue_op_err(stcb, op_err); 413163953Srrs /* queuing will steal away the mbuf chain to the out queue */ 414163953Srrs op_err = NULL; 415163953Srrs } 416163953Srrs /* extract the cookie and queue it to "echo" it back... */ 417163953Srrs stcb->asoc.overall_error_count = 0; 418163953Srrs net->error_count = 0; 419163953Srrs 420163953Srrs /* 421163953Srrs * Cancel the INIT timer, We do this first before queueing the 422163953Srrs * cookie. We always cancel at the primary to assue that we are 423163953Srrs * canceling the timer started by the INIT which always goes to the 424163953Srrs * primary. 425163953Srrs */ 426163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb, 427165220Srrs asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4); 428163953Srrs 429165220Srrs /* calculate the RTO */ 430165220Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered); 431165220Srrs 432163953Srrs retval = sctp_send_cookie_echo(m, offset, stcb, net); 433163953Srrs if (retval < 0) { 434163953Srrs /* 435163953Srrs * No cookie, we probably should send a op error. But in any 436163953Srrs * case if there is no cookie in the INIT-ACK, we can 437163953Srrs * abandon the peer, its broke. 438163953Srrs */ 439163953Srrs if (retval == -3) { 440163953Srrs /* We abort with an error of missing mandatory param */ 441163953Srrs op_err = 442163953Srrs sctp_generate_invmanparam(SCTP_CAUSE_MISSING_PARAM); 443163953Srrs if (op_err) { 444163953Srrs /* 445163953Srrs * Expand beyond to include the mandatory 446163953Srrs * param cookie 447163953Srrs */ 448163953Srrs struct sctp_inv_mandatory_param *mp; 449163953Srrs 450165647Srrs SCTP_BUF_LEN(op_err) = 451163953Srrs sizeof(struct sctp_inv_mandatory_param); 452163953Srrs mp = mtod(op_err, 453163953Srrs struct sctp_inv_mandatory_param *); 454163953Srrs /* Subtract the reserved param */ 455163953Srrs mp->length = 456163953Srrs htons(sizeof(struct sctp_inv_mandatory_param) - 2); 457163953Srrs mp->num_param = htonl(1); 458163953Srrs mp->param = htons(SCTP_STATE_COOKIE); 459163953Srrs mp->resv = 0; 460163953Srrs } 461163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, 462170181Srrs sh, op_err, 0); 463168299Srrs *abort_no_unlock = 1; 464163953Srrs } 465163953Srrs return (retval); 466163953Srrs } 467163953Srrs return (0); 468163953Srrs} 469163953Srrs 470163953Srrsstatic void 471163953Srrssctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp, 472163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 473163953Srrs{ 474163953Srrs struct sockaddr_storage store; 475163953Srrs struct sockaddr_in *sin; 476163953Srrs struct sockaddr_in6 *sin6; 477163953Srrs struct sctp_nets *r_net; 478163953Srrs struct timeval tv; 479163953Srrs 480163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) { 481163953Srrs /* Invalid length */ 482163953Srrs return; 483163953Srrs } 484163953Srrs sin = (struct sockaddr_in *)&store; 485163953Srrs sin6 = (struct sockaddr_in6 *)&store; 486163953Srrs 487163953Srrs memset(&store, 0, sizeof(store)); 488163953Srrs if (cp->heartbeat.hb_info.addr_family == AF_INET && 489163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) { 490163953Srrs sin->sin_family = cp->heartbeat.hb_info.addr_family; 491163953Srrs sin->sin_len = cp->heartbeat.hb_info.addr_len; 492163953Srrs sin->sin_port = stcb->rport; 493163953Srrs memcpy(&sin->sin_addr, cp->heartbeat.hb_info.address, 494163953Srrs sizeof(sin->sin_addr)); 495163953Srrs } else if (cp->heartbeat.hb_info.addr_family == AF_INET6 && 496163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) { 497163953Srrs sin6->sin6_family = cp->heartbeat.hb_info.addr_family; 498163953Srrs sin6->sin6_len = cp->heartbeat.hb_info.addr_len; 499163953Srrs sin6->sin6_port = stcb->rport; 500163953Srrs memcpy(&sin6->sin6_addr, cp->heartbeat.hb_info.address, 501163953Srrs sizeof(sin6->sin6_addr)); 502163953Srrs } else { 503163953Srrs return; 504163953Srrs } 505163953Srrs r_net = sctp_findnet(stcb, (struct sockaddr *)sin); 506163953Srrs if (r_net == NULL) { 507169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n"); 508163953Srrs return; 509163953Srrs } 510163953Srrs if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) && 511163953Srrs (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) && 512163953Srrs (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) { 513163953Srrs /* 514163953Srrs * If the its a HB and it's random value is correct when can 515163953Srrs * confirm the destination. 516163953Srrs */ 517163953Srrs r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 518167598Srrs if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) { 519167598Srrs stcb->asoc.primary_destination = r_net; 520167598Srrs r_net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 521167598Srrs r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY; 522167598Srrs r_net = TAILQ_FIRST(&stcb->asoc.nets); 523167598Srrs if (r_net != stcb->asoc.primary_destination) { 524167598Srrs /* 525167598Srrs * first one on the list is NOT the primary 526167598Srrs * sctp_cmpaddr() is much more efficent if 527167598Srrs * the primary is the first on the list, 528167598Srrs * make it so. 529167598Srrs */ 530167598Srrs TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 531167598Srrs TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 532167598Srrs } 533167598Srrs } 534163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 535163953Srrs stcb, 0, (void *)r_net); 536163953Srrs } 537163953Srrs r_net->error_count = 0; 538163953Srrs r_net->hb_responded = 1; 539163953Srrs tv.tv_sec = cp->heartbeat.hb_info.time_value_1; 540163953Srrs tv.tv_usec = cp->heartbeat.hb_info.time_value_2; 541163953Srrs if (r_net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 542163953Srrs r_net->dest_state &= ~SCTP_ADDR_NOT_REACHABLE; 543163953Srrs r_net->dest_state |= SCTP_ADDR_REACHABLE; 544163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 545163953Srrs SCTP_HEARTBEAT_SUCCESS, (void *)r_net); 546163953Srrs /* now was it the primary? if so restore */ 547163953Srrs if (r_net->dest_state & SCTP_ADDR_WAS_PRIMARY) { 548169420Srrs (void)sctp_set_primary_addr(stcb, (struct sockaddr *)NULL, r_net); 549163953Srrs } 550163953Srrs } 551171440Srrs /* 552171440Srrs * JRS 5/14/07 - If CMT PF is on and the destination is in PF state, 553171440Srrs * set the destination to active state and set the cwnd to one or 554171440Srrs * two MTU's based on whether PF1 or PF2 is being used. If a T3 555171440Srrs * timer is running, for the destination, stop the timer because a 556171440Srrs * PF-heartbeat was received. 557171440Srrs */ 558171440Srrs if (sctp_cmt_pf && (net->dest_state & SCTP_ADDR_PF) == 559171440Srrs SCTP_ADDR_PF) { 560171440Srrs if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 561171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 562171440Srrs stcb, net, 563171440Srrs SCTP_FROM_SCTP_INPUT + SCTP_LOC_5); 564171440Srrs } 565171440Srrs net->dest_state &= ~SCTP_ADDR_PF; 566171440Srrs net->cwnd = net->mtu * sctp_cmt_pf; 567171440Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Destination %p moved from PF to reachable with cwnd %d.\n", 568171440Srrs net, net->cwnd); 569171440Srrs } 570163953Srrs /* Now lets do a RTO with this */ 571163953Srrs r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv); 572163953Srrs} 573163953Srrs 574163953Srrsstatic void 575163953Srrssctp_handle_abort(struct sctp_abort_chunk *cp, 576163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 577163953Srrs{ 578169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n"); 579163953Srrs if (stcb == NULL) 580163953Srrs return; 581163953Srrs 582163953Srrs /* stop any receive timers */ 583171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_6); 584163953Srrs /* notify user of the abort and clean up... */ 585163953Srrs sctp_abort_notification(stcb, 0); 586163953Srrs /* free the tcb */ 587163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_aborted); 588163953Srrs if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 589163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 590163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 591163953Srrs } 592168859Srrs#ifdef SCTP_ASOCLOG_OF_TSNS 593168859Srrs sctp_print_out_track_log(stcb); 594168859Srrs#endif 595165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_6); 596169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n"); 597163953Srrs} 598163953Srrs 599163953Srrsstatic void 600163953Srrssctp_handle_shutdown(struct sctp_shutdown_chunk *cp, 601163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag) 602163953Srrs{ 603163953Srrs struct sctp_association *asoc; 604163953Srrs int some_on_streamwheel; 605163953Srrs 606169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 607169420Srrs "sctp_handle_shutdown: handling SHUTDOWN\n"); 608163953Srrs if (stcb == NULL) 609163953Srrs return; 610165220Srrs asoc = &stcb->asoc; 611165220Srrs if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 612165220Srrs (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 613163953Srrs return; 614163953Srrs } 615163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) { 616163953Srrs /* Shutdown NOT the expected size */ 617163953Srrs return; 618163953Srrs } else { 619163953Srrs sctp_update_acked(stcb, cp, net, abort_flag); 620163953Srrs } 621165220Srrs if (asoc->control_pdapi) { 622163953Srrs /* 623163953Srrs * With a normal shutdown we assume the end of last record. 624163953Srrs */ 625163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 626165220Srrs asoc->control_pdapi->end_added = 1; 627165220Srrs asoc->control_pdapi->pdapi_aborted = 1; 628165220Srrs asoc->control_pdapi = NULL; 629163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 630163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 631163953Srrs } 632163953Srrs /* goto SHUTDOWN_RECEIVED state to block new requests */ 633163953Srrs if (stcb->sctp_socket) { 634163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 635170056Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) && 636163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) { 637163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_RECEIVED; 638163953Srrs /* 639163953Srrs * notify upper layer that peer has initiated a 640163953Srrs * shutdown 641163953Srrs */ 642163953Srrs sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL); 643163953Srrs 644163953Srrs /* reset time */ 645169378Srrs (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 646163953Srrs } 647163953Srrs } 648163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) { 649163953Srrs /* 650163953Srrs * stop the shutdown timer, since we WILL move to 651163953Srrs * SHUTDOWN-ACK-SENT. 652163953Srrs */ 653171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_8); 654163953Srrs } 655171158Srrs /* Now is there unsent data on a stream somewhere? */ 656171158Srrs some_on_streamwheel = sctp_is_there_unsent_data(stcb); 657163953Srrs 658163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 659163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 660163953Srrs some_on_streamwheel) { 661163953Srrs /* By returning we will push more data out */ 662163953Srrs return; 663163953Srrs } else { 664163953Srrs /* no outstanding data to send, so move on... */ 665163953Srrs /* send SHUTDOWN-ACK */ 666163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 667163953Srrs /* move to SHUTDOWN-ACK-SENT state */ 668166675Srrs if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 669166675Srrs (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 670163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 671163953Srrs } 672163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_ACK_SENT; 673163953Srrs 674163953Srrs /* start SHUTDOWN timer */ 675163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, 676163953Srrs stcb, net); 677163953Srrs } 678163953Srrs} 679163953Srrs 680163953Srrsstatic void 681163953Srrssctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp, 682163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 683163953Srrs{ 684163953Srrs struct sctp_association *asoc; 685163953Srrs 686169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 687169420Srrs "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n"); 688163953Srrs if (stcb == NULL) 689163953Srrs return; 690163953Srrs 691163953Srrs asoc = &stcb->asoc; 692163953Srrs /* process according to association state */ 693163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 694163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 695163953Srrs /* unexpected SHUTDOWN-ACK... so ignore... */ 696163953Srrs SCTP_TCB_UNLOCK(stcb); 697163953Srrs return; 698163953Srrs } 699165220Srrs if (asoc->control_pdapi) { 700163953Srrs /* 701163953Srrs * With a normal shutdown we assume the end of last record. 702163953Srrs */ 703163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 704165220Srrs asoc->control_pdapi->end_added = 1; 705165220Srrs asoc->control_pdapi->pdapi_aborted = 1; 706165220Srrs asoc->control_pdapi = NULL; 707163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 708163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 709163953Srrs } 710163953Srrs /* are the queues empty? */ 711163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 712163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 713163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 714164205Srrs sctp_report_all_outbound(stcb, 0); 715163953Srrs } 716163953Srrs /* stop the timer */ 717171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9); 718163953Srrs /* send SHUTDOWN-COMPLETE */ 719163953Srrs sctp_send_shutdown_complete(stcb, net); 720163953Srrs /* notify upper layer protocol */ 721163953Srrs if (stcb->sctp_socket) { 722163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 723163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 724163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 725163953Srrs /* Set the connected flag to disconnected */ 726163953Srrs stcb->sctp_ep->sctp_socket->so_snd.sb_cc = 0; 727163953Srrs } 728163953Srrs } 729163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 730163953Srrs /* free the TCB but first save off the ep */ 731165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, 732171440Srrs SCTP_FROM_SCTP_INPUT + SCTP_LOC_10); 733163953Srrs} 734163953Srrs 735163953Srrs/* 736163953Srrs * Skip past the param header and then we will find the chunk that caused the 737163953Srrs * problem. There are two possiblities ASCONF or FWD-TSN other than that and 738163953Srrs * our peer must be broken. 739163953Srrs */ 740163953Srrsstatic void 741163953Srrssctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr, 742163953Srrs struct sctp_nets *net) 743163953Srrs{ 744163953Srrs struct sctp_chunkhdr *chk; 745163953Srrs 746163953Srrs chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr)); 747163953Srrs switch (chk->chunk_type) { 748163953Srrs case SCTP_ASCONF_ACK: 749163953Srrs case SCTP_ASCONF: 750163953Srrs sctp_asconf_cleanup(stcb, net); 751163953Srrs break; 752163953Srrs case SCTP_FORWARD_CUM_TSN: 753163953Srrs stcb->asoc.peer_supports_prsctp = 0; 754163953Srrs break; 755163953Srrs default: 756169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 757169420Srrs "Peer does not support chunk type %d(%x)??\n", 758169420Srrs chk->chunk_type, (uint32_t) chk->chunk_type); 759163953Srrs break; 760163953Srrs } 761163953Srrs} 762163953Srrs 763163953Srrs/* 764163953Srrs * Skip past the param header and then we will find the param that caused the 765163953Srrs * problem. There are a number of param's in a ASCONF OR the prsctp param 766163953Srrs * these will turn of specific features. 767163953Srrs */ 768163953Srrsstatic void 769163953Srrssctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr) 770163953Srrs{ 771163953Srrs struct sctp_paramhdr *pbad; 772163953Srrs 773163953Srrs pbad = phdr + 1; 774163953Srrs switch (ntohs(pbad->param_type)) { 775163953Srrs /* pr-sctp draft */ 776163953Srrs case SCTP_PRSCTP_SUPPORTED: 777163953Srrs stcb->asoc.peer_supports_prsctp = 0; 778163953Srrs break; 779163953Srrs case SCTP_SUPPORTED_CHUNK_EXT: 780163953Srrs break; 781163953Srrs /* draft-ietf-tsvwg-addip-sctp */ 782163953Srrs case SCTP_ECN_NONCE_SUPPORTED: 783163953Srrs stcb->asoc.peer_supports_ecn_nonce = 0; 784163953Srrs stcb->asoc.ecn_nonce_allowed = 0; 785163953Srrs stcb->asoc.ecn_allowed = 0; 786163953Srrs break; 787163953Srrs case SCTP_ADD_IP_ADDRESS: 788163953Srrs case SCTP_DEL_IP_ADDRESS: 789163953Srrs case SCTP_SET_PRIM_ADDR: 790163953Srrs stcb->asoc.peer_supports_asconf = 0; 791163953Srrs break; 792163953Srrs case SCTP_SUCCESS_REPORT: 793163953Srrs case SCTP_ERROR_CAUSE_IND: 794169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n"); 795169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 796169420Srrs "Turning off ASCONF to this strange peer\n"); 797163953Srrs stcb->asoc.peer_supports_asconf = 0; 798163953Srrs break; 799163953Srrs default: 800169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 801169420Srrs "Peer does not support param type %d(%x)??\n", 802169420Srrs pbad->param_type, (uint32_t) pbad->param_type); 803163953Srrs break; 804163953Srrs } 805163953Srrs} 806163953Srrs 807163953Srrsstatic int 808163953Srrssctp_handle_error(struct sctp_chunkhdr *ch, 809163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 810163953Srrs{ 811163953Srrs int chklen; 812163953Srrs struct sctp_paramhdr *phdr; 813163953Srrs uint16_t error_type; 814163953Srrs uint16_t error_len; 815163953Srrs struct sctp_association *asoc; 816163953Srrs 817163953Srrs int adjust; 818163953Srrs 819163953Srrs /* parse through all of the errors and process */ 820163953Srrs asoc = &stcb->asoc; 821163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)ch + 822163953Srrs sizeof(struct sctp_chunkhdr)); 823163953Srrs chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr); 824163953Srrs while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) { 825163953Srrs /* Process an Error Cause */ 826163953Srrs error_type = ntohs(phdr->param_type); 827163953Srrs error_len = ntohs(phdr->param_length); 828163953Srrs if ((error_len > chklen) || (error_len == 0)) { 829163953Srrs /* invalid param length for this param */ 830169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in error param- chunk left:%d errorlen:%d\n", 831169420Srrs chklen, error_len); 832163953Srrs return (0); 833163953Srrs } 834163953Srrs switch (error_type) { 835163953Srrs case SCTP_CAUSE_INVALID_STREAM: 836163953Srrs case SCTP_CAUSE_MISSING_PARAM: 837163953Srrs case SCTP_CAUSE_INVALID_PARAM: 838163953Srrs case SCTP_CAUSE_NO_USER_DATA: 839169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %d back? We have a bug :/ (or do they?)\n", 840169420Srrs error_type); 841163953Srrs break; 842163953Srrs case SCTP_CAUSE_STALE_COOKIE: 843163953Srrs /* 844163953Srrs * We only act if we have echoed a cookie and are 845163953Srrs * waiting. 846163953Srrs */ 847163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 848163953Srrs int *p; 849163953Srrs 850163953Srrs p = (int *)((caddr_t)phdr + sizeof(*phdr)); 851163953Srrs /* Save the time doubled */ 852163953Srrs asoc->cookie_preserve_req = ntohl(*p) << 1; 853163953Srrs asoc->stale_cookie_count++; 854163953Srrs if (asoc->stale_cookie_count > 855163953Srrs asoc->max_init_times) { 856163953Srrs sctp_abort_notification(stcb, 0); 857163953Srrs /* now free the asoc */ 858171440Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_11); 859163953Srrs return (-1); 860163953Srrs } 861163953Srrs /* blast back to INIT state */ 862163953Srrs asoc->state &= ~SCTP_STATE_COOKIE_ECHOED; 863163953Srrs asoc->state |= SCTP_STATE_COOKIE_WAIT; 864163953Srrs 865163953Srrs sctp_stop_all_cookie_timers(stcb); 866163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 867163953Srrs } 868163953Srrs break; 869163953Srrs case SCTP_CAUSE_UNRESOLVABLE_ADDR: 870163953Srrs /* 871163953Srrs * Nothing we can do here, we don't do hostname 872163953Srrs * addresses so if the peer does not like my IPv6 873163953Srrs * (or IPv4 for that matter) it does not matter. If 874163953Srrs * they don't support that type of address, they can 875163953Srrs * NOT possibly get that packet type... i.e. with no 876163953Srrs * IPv6 you can't recieve a IPv6 packet. so we can 877163953Srrs * safely ignore this one. If we ever added support 878163953Srrs * for HOSTNAME Addresses, then we would need to do 879163953Srrs * something here. 880163953Srrs */ 881163953Srrs break; 882163953Srrs case SCTP_CAUSE_UNRECOG_CHUNK: 883163953Srrs sctp_process_unrecog_chunk(stcb, phdr, net); 884163953Srrs break; 885163953Srrs case SCTP_CAUSE_UNRECOG_PARAM: 886163953Srrs sctp_process_unrecog_param(stcb, phdr); 887163953Srrs break; 888163953Srrs case SCTP_CAUSE_COOKIE_IN_SHUTDOWN: 889163953Srrs /* 890163953Srrs * We ignore this since the timer will drive out a 891163953Srrs * new cookie anyway and there timer will drive us 892163953Srrs * to send a SHUTDOWN_COMPLETE. We can't send one 893163953Srrs * here since we don't have their tag. 894163953Srrs */ 895163953Srrs break; 896163953Srrs case SCTP_CAUSE_DELETING_LAST_ADDR: 897163953Srrs case SCTP_CAUSE_RESOURCE_SHORTAGE: 898163953Srrs case SCTP_CAUSE_DELETING_SRC_ADDR: 899163953Srrs /* 900163953Srrs * We should NOT get these here, but in a 901166086Srrs * ASCONF-ACK. 902163953Srrs */ 903169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a Operational Error?<%d>?\n", 904169420Srrs error_type); 905163953Srrs break; 906163953Srrs case SCTP_CAUSE_OUT_OF_RESC: 907163953Srrs /* 908163953Srrs * And what, pray tell do we do with the fact that 909163953Srrs * the peer is out of resources? Not really sure we 910166086Srrs * could do anything but abort. I suspect this 911163953Srrs * should have came WITH an abort instead of in a 912163953Srrs * OP-ERROR. 913163953Srrs */ 914163953Srrs break; 915163953Srrs default: 916169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown error type = 0x%xh\n", 917169420Srrs error_type); 918163953Srrs break; 919163953Srrs } 920163953Srrs adjust = SCTP_SIZE32(error_len); 921163953Srrs chklen -= adjust; 922163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust); 923163953Srrs } 924163953Srrs return (0); 925163953Srrs} 926163953Srrs 927163953Srrsstatic int 928169352Srrssctp_handle_init_ack(struct mbuf *m, int iphlen, int offset, 929169352Srrs struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 930170181Srrs struct sctp_nets *net, int *abort_no_unlock, uint32_t vrf_id) 931163953Srrs{ 932163953Srrs struct sctp_init_ack *init_ack; 933163953Srrs int *state; 934163953Srrs struct mbuf *op_err; 935163953Srrs 936169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 937169420Srrs "sctp_handle_init_ack: handling INIT-ACK\n"); 938169420Srrs 939163953Srrs if (stcb == NULL) { 940169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 941169420Srrs "sctp_handle_init_ack: TCB is null\n"); 942163953Srrs return (-1); 943163953Srrs } 944163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) { 945163953Srrs /* Invalid length */ 946163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 947163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 948170181Srrs op_err, 0); 949168299Srrs *abort_no_unlock = 1; 950163953Srrs return (-1); 951163953Srrs } 952163953Srrs init_ack = &cp->init; 953163953Srrs /* validate parameters */ 954163953Srrs if (init_ack->initiate_tag == 0) { 955163953Srrs /* protocol error... send an abort */ 956163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 957163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 958170181Srrs op_err, 0); 959168299Srrs *abort_no_unlock = 1; 960163953Srrs return (-1); 961163953Srrs } 962163953Srrs if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) { 963163953Srrs /* protocol error... send an abort */ 964163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 965163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 966170181Srrs op_err, 0); 967168299Srrs *abort_no_unlock = 1; 968163953Srrs return (-1); 969163953Srrs } 970163953Srrs if (init_ack->num_inbound_streams == 0) { 971163953Srrs /* protocol error... send an abort */ 972163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 973163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 974170181Srrs op_err, 0); 975168299Srrs *abort_no_unlock = 1; 976163953Srrs return (-1); 977163953Srrs } 978163953Srrs if (init_ack->num_outbound_streams == 0) { 979163953Srrs /* protocol error... send an abort */ 980163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 981163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 982170181Srrs op_err, 0); 983168299Srrs *abort_no_unlock = 1; 984163953Srrs return (-1); 985163953Srrs } 986163953Srrs /* process according to association state... */ 987163953Srrs state = &stcb->asoc.state; 988163953Srrs switch (*state & SCTP_STATE_MASK) { 989163953Srrs case SCTP_STATE_COOKIE_WAIT: 990163953Srrs /* this is the expected state for this chunk */ 991163953Srrs /* process the INIT-ACK parameters */ 992163953Srrs if (stcb->asoc.primary_destination->dest_state & 993163953Srrs SCTP_ADDR_UNCONFIRMED) { 994163953Srrs /* 995163953Srrs * The primary is where we sent the INIT, we can 996163953Srrs * always consider it confirmed when the INIT-ACK is 997163953Srrs * returned. Do this before we load addresses 998163953Srrs * though. 999163953Srrs */ 1000163953Srrs stcb->asoc.primary_destination->dest_state &= 1001163953Srrs ~SCTP_ADDR_UNCONFIRMED; 1002163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 1003163953Srrs stcb, 0, (void *)stcb->asoc.primary_destination); 1004163953Srrs } 1005169352Srrs if (sctp_process_init_ack(m, iphlen, offset, sh, cp, stcb, 1006170181Srrs net, abort_no_unlock, vrf_id) < 0) { 1007163953Srrs /* error in parsing parameters */ 1008163953Srrs return (-1); 1009163953Srrs } 1010163953Srrs /* update our state */ 1011169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n"); 1012163953Srrs if (*state & SCTP_STATE_SHUTDOWN_PENDING) { 1013163953Srrs *state = SCTP_STATE_COOKIE_ECHOED | 1014163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 1015163953Srrs } else { 1016163953Srrs *state = SCTP_STATE_COOKIE_ECHOED; 1017163953Srrs } 1018163953Srrs 1019163953Srrs /* reset the RTO calc */ 1020163953Srrs stcb->asoc.overall_error_count = 0; 1021169378Srrs (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1022163953Srrs /* 1023163953Srrs * collapse the init timer back in case of a exponential 1024165220Srrs * backoff 1025163953Srrs */ 1026163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep, 1027163953Srrs stcb, net); 1028163953Srrs /* 1029163953Srrs * the send at the end of the inbound data processing will 1030163953Srrs * cause the cookie to be sent 1031163953Srrs */ 1032163953Srrs break; 1033163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 1034163953Srrs /* incorrect state... discard */ 1035163953Srrs break; 1036163953Srrs case SCTP_STATE_COOKIE_ECHOED: 1037163953Srrs /* incorrect state... discard */ 1038163953Srrs break; 1039163953Srrs case SCTP_STATE_OPEN: 1040163953Srrs /* incorrect state... discard */ 1041163953Srrs break; 1042163953Srrs case SCTP_STATE_EMPTY: 1043163953Srrs case SCTP_STATE_INUSE: 1044163953Srrs default: 1045163953Srrs /* incorrect state... discard */ 1046163953Srrs return (-1); 1047163953Srrs break; 1048163953Srrs } 1049169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n"); 1050163953Srrs return (0); 1051163953Srrs} 1052163953Srrs 1053163953Srrs 1054163953Srrs/* 1055163953Srrs * handle a state cookie for an existing association m: input packet mbuf 1056163953Srrs * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a 1057163953Srrs * "split" mbuf and the cookie signature does not exist offset: offset into 1058163953Srrs * mbuf to the cookie-echo chunk 1059163953Srrs */ 1060163953Srrsstatic struct sctp_tcb * 1061163953Srrssctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset, 1062163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1063163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 1064169352Srrs struct sockaddr *init_src, int *notification, sctp_assoc_t * sac_assoc_id, 1065170181Srrs uint32_t vrf_id) 1066163953Srrs{ 1067163953Srrs struct sctp_association *asoc; 1068163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1069163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1070163953Srrs int chk_length; 1071165220Srrs int init_offset, initack_offset, i; 1072163953Srrs int retval; 1073164205Srrs int spec_flag = 0; 1074170140Srrs uint32_t how_indx; 1075163953Srrs 1076163953Srrs /* I know that the TCB is non-NULL from the caller */ 1077163953Srrs asoc = &stcb->asoc; 1078166675Srrs for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) { 1079166023Srrs if (asoc->cookie_how[how_indx] == 0) 1080166023Srrs break; 1081166023Srrs } 1082166023Srrs if (how_indx < sizeof(asoc->cookie_how)) { 1083166023Srrs asoc->cookie_how[how_indx] = 1; 1084166023Srrs } 1085163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) { 1086163953Srrs /* SHUTDOWN came in after sending INIT-ACK */ 1087163953Srrs struct mbuf *op_err; 1088163953Srrs struct sctp_paramhdr *ph; 1089163953Srrs 1090163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 1091163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 1092165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 1093163953Srrs if (op_err == NULL) { 1094163953Srrs /* FOOBAR */ 1095163953Srrs return (NULL); 1096163953Srrs } 1097163953Srrs /* pre-reserve some space */ 1098165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 1099165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 1100165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 1101163953Srrs /* Set the len */ 1102165647Srrs SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 1103163953Srrs ph = mtod(op_err, struct sctp_paramhdr *); 1104163953Srrs ph->param_type = htons(SCTP_CAUSE_COOKIE_IN_SHUTDOWN); 1105163953Srrs ph->param_length = htons(sizeof(struct sctp_paramhdr)); 1106169352Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag, 1107170181Srrs vrf_id); 1108166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1109166023Srrs asoc->cookie_how[how_indx] = 2; 1110163953Srrs return (NULL); 1111163953Srrs } 1112163953Srrs /* 1113163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1114163953Srrs * INIT should start after the cookie-echo header struct (chunk 1115163953Srrs * header, state cookie header struct) 1116163953Srrs */ 1117163953Srrs init_offset = offset += sizeof(struct sctp_cookie_echo_chunk); 1118163953Srrs 1119163953Srrs init_cp = (struct sctp_init_chunk *) 1120163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1121163953Srrs (uint8_t *) & init_buf); 1122163953Srrs if (init_cp == NULL) { 1123163953Srrs /* could not pull a INIT chunk in cookie */ 1124163953Srrs return (NULL); 1125163953Srrs } 1126163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1127163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1128163953Srrs return (NULL); 1129163953Srrs } 1130163953Srrs /* 1131163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1132163953Srrs * INIT-ACK follows the INIT chunk 1133163953Srrs */ 1134163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1135163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1136163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1137163953Srrs (uint8_t *) & initack_buf); 1138163953Srrs if (initack_cp == NULL) { 1139163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1140163953Srrs return (NULL); 1141163953Srrs } 1142163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1143163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1144163953Srrs return (NULL); 1145163953Srrs } 1146163953Srrs if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) && 1147163953Srrs (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) { 1148163953Srrs /* 1149163953Srrs * case D in Section 5.2.4 Table 2: MMAA process accordingly 1150163953Srrs * to get into the OPEN state 1151163953Srrs */ 1152166023Srrs if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) { 1153166086Srrs#ifdef INVARIANTS 1154166023Srrs panic("Case D and non-match seq?"); 1155166086Srrs#else 1156169420Srrs SCTP_PRINTF("Case D, seq non-match %x vs %x?\n", 1157169420Srrs ntohl(initack_cp->init.initial_tsn), 1158169420Srrs asoc->init_seq_number); 1159166086Srrs#endif 1160166023Srrs } 1161163953Srrs switch SCTP_GET_STATE 1162163953Srrs (asoc) { 1163163953Srrs case SCTP_STATE_COOKIE_WAIT: 1164166023Srrs case SCTP_STATE_COOKIE_ECHOED: 1165163953Srrs /* 1166169352Srrs * INIT was sent but got a COOKIE_ECHO with the 1167166023Srrs * correct tags... just accept it...but we must 1168166023Srrs * process the init so that we can make sure we have 1169166023Srrs * the right seq no's. 1170163953Srrs */ 1171163953Srrs /* First we must process the INIT !! */ 1172163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1173163953Srrs if (retval < 0) { 1174166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1175166023Srrs asoc->cookie_how[how_indx] = 3; 1176163953Srrs return (NULL); 1177163953Srrs } 1178163953Srrs /* we have already processed the INIT so no problem */ 1179163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, 1180171440Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_12); 1181171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_13); 1182163953Srrs /* update current state */ 1183166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) 1184166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1185166675Srrs else 1186166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1187163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1188166675Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1189163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1190163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1191163953Srrs 1192166675Srrs } else { 1193163953Srrs /* if ok, move to OPEN state */ 1194163953Srrs asoc->state = SCTP_STATE_OPEN; 1195163953Srrs } 1196166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1197165220Srrs sctp_stop_all_cookie_timers(stcb); 1198163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1199163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1200163953Srrs (inp->sctp_socket->so_qlimit == 0) 1201163953Srrs ) { 1202163953Srrs /* 1203163953Srrs * Here is where collision would go if we 1204163953Srrs * did a connect() and instead got a 1205163953Srrs * init/init-ack/cookie done before the 1206163953Srrs * init-ack came back.. 1207163953Srrs */ 1208163953Srrs stcb->sctp_ep->sctp_flags |= 1209163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1210163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1211163953Srrs } 1212163953Srrs /* notify upper layer */ 1213163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1214163953Srrs /* 1215163953Srrs * since we did not send a HB make sure we don't 1216163953Srrs * double things 1217163953Srrs */ 1218163953Srrs net->hb_responded = 1; 1219170642Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, 1220170642Srrs &cookie->time_entered); 1221163953Srrs 1222163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1223163953Srrs (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) { 1224163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 1225163953Srrs inp, stcb, NULL); 1226163953Srrs } 1227163953Srrs break; 1228163953Srrs default: 1229163953Srrs /* 1230163953Srrs * we're in the OPEN state (or beyond), so peer must 1231163953Srrs * have simply lost the COOKIE-ACK 1232163953Srrs */ 1233163953Srrs break; 1234163953Srrs } /* end switch */ 1235165220Srrs sctp_stop_all_cookie_timers(stcb); 1236163953Srrs /* 1237163953Srrs * We ignore the return code here.. not sure if we should 1238163953Srrs * somehow abort.. but we do have an existing asoc. This 1239163953Srrs * really should not fail. 1240163953Srrs */ 1241163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1242163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1243163953Srrs initack_offset, sh, init_src)) { 1244166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1245166023Srrs asoc->cookie_how[how_indx] = 4; 1246163953Srrs return (NULL); 1247163953Srrs } 1248163953Srrs /* respond with a COOKIE-ACK */ 1249165220Srrs sctp_toss_old_cookies(stcb, asoc); 1250163953Srrs sctp_send_cookie_ack(stcb); 1251166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1252166023Srrs asoc->cookie_how[how_indx] = 5; 1253163953Srrs return (stcb); 1254169352Srrs } 1255163953Srrs if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1256163953Srrs ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag && 1257163953Srrs cookie->tie_tag_my_vtag == 0 && 1258163953Srrs cookie->tie_tag_peer_vtag == 0) { 1259163953Srrs /* 1260163953Srrs * case C in Section 5.2.4 Table 2: XMOO silently discard 1261163953Srrs */ 1262166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1263166023Srrs asoc->cookie_how[how_indx] = 6; 1264163953Srrs return (NULL); 1265163953Srrs } 1266163953Srrs if (ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag && 1267163953Srrs (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag || 1268163953Srrs init_cp->init.initiate_tag == 0)) { 1269163953Srrs /* 1270163953Srrs * case B in Section 5.2.4 Table 2: MXAA or MOAA my info 1271163953Srrs * should be ok, re-accept peer info 1272163953Srrs */ 1273166023Srrs if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) { 1274166023Srrs /* 1275166023Srrs * Extension of case C. If we hit this, then the 1276166023Srrs * random number generator returned the same vtag 1277166023Srrs * when we first sent our INIT-ACK and when we later 1278166023Srrs * sent our INIT. The side with the seq numbers that 1279166023Srrs * are different will be the one that normnally 1280166023Srrs * would have hit case C. This in effect "extends" 1281166023Srrs * our vtags in this collision case to be 64 bits. 1282166023Srrs * The same collision could occur aka you get both 1283166023Srrs * vtag and seq number the same twice in a row.. but 1284166023Srrs * is much less likely. If it did happen then we 1285166023Srrs * would proceed through and bring up the assoc.. we 1286166023Srrs * may end up with the wrong stream setup however.. 1287166023Srrs * which would be bad.. but there is no way to 1288166023Srrs * tell.. until we send on a stream that does not 1289166023Srrs * exist :-) 1290166023Srrs */ 1291166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1292166023Srrs asoc->cookie_how[how_indx] = 7; 1293166023Srrs 1294166023Srrs return (NULL); 1295166023Srrs } 1296166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1297166023Srrs asoc->cookie_how[how_indx] = 8; 1298171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_14); 1299163953Srrs sctp_stop_all_cookie_timers(stcb); 1300163953Srrs /* 1301163953Srrs * since we did not send a HB make sure we don't double 1302163953Srrs * things 1303163953Srrs */ 1304163953Srrs net->hb_responded = 1; 1305163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1306163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1307163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1308163953Srrs NULL); 1309163953Srrs } 1310163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1311164205Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1312164205Srrs 1313164205Srrs /* Note last_cwr_tsn? where is this used? */ 1314163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1315164205Srrs if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) { 1316164205Srrs /* 1317164205Srrs * Ok the peer probably discarded our data (if we 1318164205Srrs * echoed a cookie+data). So anything on the 1319164205Srrs * sent_queue should be marked for retransmit, we 1320164205Srrs * may not get something to kick us so it COULD 1321164205Srrs * still take a timeout to move these.. but it can't 1322164205Srrs * hurt to mark them. 1323164205Srrs */ 1324164205Srrs struct sctp_tmit_chunk *chk; 1325163953Srrs 1326164205Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1327164205Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 1328164205Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1329171440Srrs sctp_flight_size_decrease(chk); 1330171440Srrs sctp_total_flight_decrease(stcb, chk); 1331168124Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1332164205Srrs spec_flag++; 1333164205Srrs } 1334164205Srrs } 1335164205Srrs 1336164205Srrs } 1337163953Srrs /* process the INIT info (peer's info) */ 1338163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1339163953Srrs if (retval < 0) { 1340166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1341166023Srrs asoc->cookie_how[how_indx] = 9; 1342163953Srrs return (NULL); 1343163953Srrs } 1344163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1345163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1346163953Srrs initack_offset, sh, init_src)) { 1347166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1348166023Srrs asoc->cookie_how[how_indx] = 10; 1349163953Srrs return (NULL); 1350163953Srrs } 1351163953Srrs if ((asoc->state & SCTP_STATE_COOKIE_WAIT) || 1352163953Srrs (asoc->state & SCTP_STATE_COOKIE_ECHOED)) { 1353163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1354163953Srrs 1355163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1356163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1357163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1358163953Srrs stcb->sctp_ep->sctp_flags |= 1359163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1360163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1361163953Srrs } 1362166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) 1363166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1364166675Srrs else 1365166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1366166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1367166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1368166675Srrs } else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 1369166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_restartestab); 1370166675Srrs } else { 1371166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1372163953Srrs } 1373163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1374166675Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1375163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1376163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1377163953Srrs 1378163953Srrs } else { 1379163953Srrs asoc->state = SCTP_STATE_OPEN; 1380163953Srrs } 1381163953Srrs sctp_stop_all_cookie_timers(stcb); 1382165220Srrs sctp_toss_old_cookies(stcb, asoc); 1383163953Srrs sctp_send_cookie_ack(stcb); 1384164205Srrs if (spec_flag) { 1385164205Srrs /* 1386164205Srrs * only if we have retrans set do we do this. What 1387164205Srrs * this call does is get only the COOKIE-ACK out and 1388164205Srrs * then when we return the normal call to 1389164205Srrs * sctp_chunk_output will get the retrans out behind 1390164205Srrs * this. 1391164205Srrs */ 1392164205Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK); 1393164205Srrs } 1394166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1395166023Srrs asoc->cookie_how[how_indx] = 11; 1396166023Srrs 1397163953Srrs return (stcb); 1398163953Srrs } 1399163953Srrs if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1400163953Srrs ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) && 1401163953Srrs cookie->tie_tag_my_vtag == asoc->my_vtag_nonce && 1402163953Srrs cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce && 1403163953Srrs cookie->tie_tag_peer_vtag != 0) { 1404163953Srrs struct sctpasochead *head; 1405163953Srrs 1406163953Srrs /* 1407163953Srrs * case A in Section 5.2.4 Table 2: XXMM (peer restarted) 1408163953Srrs */ 1409165220Srrs /* temp code */ 1410166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1411166023Srrs asoc->cookie_how[how_indx] = 12; 1412171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_15); 1413171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16); 1414165647Srrs 1415163953Srrs *sac_assoc_id = sctp_get_associd(stcb); 1416163953Srrs /* notify upper layer */ 1417163953Srrs *notification = SCTP_NOTIFY_ASSOC_RESTART; 1418165220Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1419166675Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) && 1420166675Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 1421166675Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) { 1422166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1423166675Srrs } 1424166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 1425166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_restartestab); 1426166675Srrs } else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) { 1427166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_collisionestab); 1428166675Srrs } 1429165647Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1430165647Srrs asoc->state = SCTP_STATE_OPEN | 1431165647Srrs SCTP_STATE_SHUTDOWN_PENDING; 1432165647Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1433165647Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1434165647Srrs 1435165647Srrs } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) { 1436165647Srrs /* move to OPEN state, if not in SHUTDOWN_SENT */ 1437165647Srrs asoc->state = SCTP_STATE_OPEN; 1438165647Srrs } 1439165647Srrs asoc->pre_open_streams = 1440165647Srrs ntohs(initack_cp->init.num_outbound_streams); 1441165647Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1442165647Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1443165647Srrs 1444165647Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1445165647Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1446165647Srrs 1447165647Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1448165647Srrs 1449165647Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1450170138Srrs if (asoc->mapping_array) { 1451165647Srrs memset(asoc->mapping_array, 0, 1452165647Srrs asoc->mapping_array_size); 1453170138Srrs } 1454165220Srrs SCTP_TCB_UNLOCK(stcb); 1455165220Srrs SCTP_INP_INFO_WLOCK(); 1456165220Srrs SCTP_INP_WLOCK(stcb->sctp_ep); 1457165220Srrs SCTP_TCB_LOCK(stcb); 1458165220Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1459163953Srrs /* send up all the data */ 1460164205Srrs SCTP_TCB_SEND_LOCK(stcb); 1461165220Srrs 1462164205Srrs sctp_report_all_outbound(stcb, 1); 1463165220Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1464165220Srrs stcb->asoc.strmout[i].stream_no = i; 1465165220Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 1466165220Srrs stcb->asoc.strmout[i].last_msg_incomplete = 0; 1467165220Srrs } 1468163953Srrs /* process the INIT-ACK info (my info) */ 1469163953Srrs asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1470163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1471163953Srrs 1472163953Srrs /* pull from vtag hash */ 1473163953Srrs LIST_REMOVE(stcb, sctp_asocs); 1474163953Srrs /* re-insert to new vtag position */ 1475163953Srrs head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 1476163953Srrs sctppcbinfo.hashasocmark)]; 1477163953Srrs /* 1478163953Srrs * put it in the bucket in the vtag hash of assoc's for the 1479163953Srrs * system 1480163953Srrs */ 1481163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_asocs); 1482163953Srrs 1483163953Srrs /* Is this the first restart? */ 1484163953Srrs if (stcb->asoc.in_restart_hash == 0) { 1485163953Srrs /* Ok add it to assoc_id vtag hash */ 1486163953Srrs head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 1487163953Srrs sctppcbinfo.hashrestartmark)]; 1488163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_tcbrestarhash); 1489163953Srrs stcb->asoc.in_restart_hash = 1; 1490163953Srrs } 1491163953Srrs /* process the INIT info (peer's info) */ 1492164205Srrs SCTP_TCB_SEND_UNLOCK(stcb); 1493165220Srrs SCTP_INP_WUNLOCK(stcb->sctp_ep); 1494165220Srrs SCTP_INP_INFO_WUNLOCK(); 1495165220Srrs 1496163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1497163953Srrs if (retval < 0) { 1498166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1499166023Srrs asoc->cookie_how[how_indx] = 13; 1500166023Srrs 1501163953Srrs return (NULL); 1502163953Srrs } 1503163953Srrs /* 1504163953Srrs * since we did not send a HB make sure we don't double 1505163953Srrs * things 1506163953Srrs */ 1507163953Srrs net->hb_responded = 1; 1508163953Srrs 1509163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1510163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1511163953Srrs initack_offset, sh, init_src)) { 1512166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1513166023Srrs asoc->cookie_how[how_indx] = 14; 1514166023Srrs 1515163953Srrs return (NULL); 1516163953Srrs } 1517163953Srrs /* respond with a COOKIE-ACK */ 1518163953Srrs sctp_stop_all_cookie_timers(stcb); 1519165220Srrs sctp_toss_old_cookies(stcb, asoc); 1520163953Srrs sctp_send_cookie_ack(stcb); 1521166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1522166023Srrs asoc->cookie_how[how_indx] = 15; 1523163953Srrs 1524163953Srrs return (stcb); 1525163953Srrs } 1526166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1527166023Srrs asoc->cookie_how[how_indx] = 16; 1528163953Srrs /* all other cases... */ 1529163953Srrs return (NULL); 1530163953Srrs} 1531163953Srrs 1532166086Srrs 1533163953Srrs/* 1534163953Srrs * handle a state cookie for a new association m: input packet mbuf chain-- 1535163953Srrs * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf 1536163953Srrs * and the cookie signature does not exist offset: offset into mbuf to the 1537163953Srrs * cookie-echo chunk length: length of the cookie chunk to: where the init 1538163953Srrs * was from returns a new TCB 1539163953Srrs */ 1540163953Srrsstatic struct sctp_tcb * 1541163953Srrssctp_process_cookie_new(struct mbuf *m, int iphlen, int offset, 1542163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1543163953Srrs struct sctp_inpcb *inp, struct sctp_nets **netp, 1544163953Srrs struct sockaddr *init_src, int *notification, 1545169352Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len, 1546170181Srrs uint32_t vrf_id) 1547163953Srrs{ 1548163953Srrs struct sctp_tcb *stcb; 1549163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1550163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1551163953Srrs struct sockaddr_storage sa_store; 1552163953Srrs struct sockaddr *initack_src = (struct sockaddr *)&sa_store; 1553163953Srrs struct sockaddr_in *sin; 1554163953Srrs struct sockaddr_in6 *sin6; 1555163953Srrs struct sctp_association *asoc; 1556163953Srrs int chk_length; 1557163953Srrs int init_offset, initack_offset, initack_limit; 1558163953Srrs int retval; 1559163953Srrs int error = 0; 1560163953Srrs uint32_t old_tag; 1561166675Srrs uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE]; 1562163953Srrs 1563163953Srrs /* 1564163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1565163953Srrs * INIT should start after the cookie-echo header struct (chunk 1566163953Srrs * header, state cookie header struct) 1567163953Srrs */ 1568163953Srrs init_offset = offset + sizeof(struct sctp_cookie_echo_chunk); 1569163953Srrs init_cp = (struct sctp_init_chunk *) 1570163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1571163953Srrs (uint8_t *) & init_buf); 1572163953Srrs if (init_cp == NULL) { 1573163953Srrs /* could not pull a INIT chunk in cookie */ 1574169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 1575169420Srrs "process_cookie_new: could not pull INIT chunk hdr\n"); 1576163953Srrs return (NULL); 1577163953Srrs } 1578163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1579163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1580169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n"); 1581163953Srrs return (NULL); 1582163953Srrs } 1583163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1584163953Srrs /* 1585163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1586163953Srrs * INIT-ACK follows the INIT chunk 1587163953Srrs */ 1588163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1589163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1590163953Srrs (uint8_t *) & initack_buf); 1591163953Srrs if (initack_cp == NULL) { 1592163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1593169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n"); 1594163953Srrs return (NULL); 1595163953Srrs } 1596163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1597163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1598163953Srrs return (NULL); 1599163953Srrs } 1600163953Srrs /* 1601163953Srrs * NOTE: We can't use the INIT_ACK's chk_length to determine the 1602163953Srrs * "initack_limit" value. This is because the chk_length field 1603163953Srrs * includes the length of the cookie, but the cookie is omitted when 1604163953Srrs * the INIT and INIT_ACK are tacked onto the cookie... 1605163953Srrs */ 1606163953Srrs initack_limit = offset + cookie_len; 1607163953Srrs 1608163953Srrs /* 1609163953Srrs * now that we know the INIT/INIT-ACK are in place, create a new TCB 1610163953Srrs * and popluate 1611163953Srrs */ 1612163953Srrs stcb = sctp_aloc_assoc(inp, init_src, 0, &error, 1613168299Srrs ntohl(initack_cp->init.initiate_tag), vrf_id); 1614163953Srrs if (stcb == NULL) { 1615163953Srrs struct mbuf *op_err; 1616163953Srrs 1617163953Srrs /* memory problem? */ 1618169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 1619169420Srrs "process_cookie_new: no room for another TCB!\n"); 1620163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1621170140Srrs 1622163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1623170181Srrs sh, op_err, vrf_id); 1624163953Srrs return (NULL); 1625163953Srrs } 1626163953Srrs /* get the correct sctp_nets */ 1627169420Srrs if (netp) 1628169420Srrs *netp = sctp_findnet(stcb, init_src); 1629169420Srrs 1630163953Srrs asoc = &stcb->asoc; 1631163953Srrs /* get scope variables out of cookie */ 1632163953Srrs asoc->ipv4_local_scope = cookie->ipv4_scope; 1633163953Srrs asoc->site_scope = cookie->site_scope; 1634163953Srrs asoc->local_scope = cookie->local_scope; 1635163953Srrs asoc->loopback_scope = cookie->loopback_scope; 1636163953Srrs 1637163953Srrs if ((asoc->ipv4_addr_legal != cookie->ipv4_addr_legal) || 1638163953Srrs (asoc->ipv6_addr_legal != cookie->ipv6_addr_legal)) { 1639163953Srrs struct mbuf *op_err; 1640163953Srrs 1641163953Srrs /* 1642163953Srrs * Houston we have a problem. The EP changed while the 1643163953Srrs * cookie was in flight. Only recourse is to abort the 1644163953Srrs * association. 1645163953Srrs */ 1646170140Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1647163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1648163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1649170181Srrs sh, op_err, vrf_id); 1650171440Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 1651171440Srrs SCTP_FROM_SCTP_INPUT + SCTP_LOC_16); 1652170140Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1653163953Srrs return (NULL); 1654163953Srrs } 1655163953Srrs /* process the INIT-ACK info (my info) */ 1656163953Srrs old_tag = asoc->my_vtag; 1657163953Srrs asoc->assoc_id = asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1658163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1659163953Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1660163953Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1661163953Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1662163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1663163953Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1664163953Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1665163953Srrs 1666163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1667163953Srrs 1668163953Srrs /* process the INIT info (peer's info) */ 1669169420Srrs if (netp) 1670169420Srrs retval = sctp_process_init(init_cp, stcb, *netp); 1671169420Srrs else 1672169420Srrs retval = 0; 1673163953Srrs if (retval < 0) { 1674170140Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1675165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16); 1676170140Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1677163953Srrs return (NULL); 1678163953Srrs } 1679163953Srrs /* load all addresses */ 1680163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1681163953Srrs init_offset + sizeof(struct sctp_init_chunk), initack_offset, sh, 1682163953Srrs init_src)) { 1683170140Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1684165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_17); 1685170140Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1686163953Srrs return (NULL); 1687163953Srrs } 1688163953Srrs /* 1689163953Srrs * verify any preceding AUTH chunk that was skipped 1690163953Srrs */ 1691163953Srrs /* pull the local authentication parameters from the cookie/init-ack */ 1692163953Srrs sctp_auth_get_cookie_params(stcb, m, 1693163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1694163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk))); 1695163953Srrs if (auth_skipped) { 1696163953Srrs struct sctp_auth_chunk *auth; 1697163953Srrs 1698163953Srrs auth = (struct sctp_auth_chunk *) 1699166675Srrs sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf); 1700169420Srrs if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) { 1701163953Srrs /* auth HMAC failed, dump the assoc and packet */ 1702169420Srrs SCTPDBG(SCTP_DEBUG_AUTH1, 1703169420Srrs "COOKIE-ECHO: AUTH failed\n"); 1704171440Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1705165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_18); 1706171440Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1707163953Srrs return (NULL); 1708163953Srrs } else { 1709163953Srrs /* remaining chunks checked... good to go */ 1710163953Srrs stcb->asoc.authenticated = 1; 1711163953Srrs } 1712163953Srrs } 1713163953Srrs /* update current state */ 1714169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n"); 1715163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1716163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1717163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1718163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1719163953Srrs } else { 1720163953Srrs asoc->state = SCTP_STATE_OPEN; 1721163953Srrs } 1722165220Srrs sctp_stop_all_cookie_timers(stcb); 1723163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_passiveestab); 1724163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1725163953Srrs 1726163953Srrs /* 1727163953Srrs * if we're doing ASCONFs, check to see if we have any new local 1728163953Srrs * addresses that need to get added to the peer (eg. addresses 1729163953Srrs * changed while cookie echo in flight). This needs to be done 1730163953Srrs * after we go to the OPEN state to do the correct asconf 1731163953Srrs * processing. else, make sure we have the correct addresses in our 1732163953Srrs * lists 1733163953Srrs */ 1734163953Srrs 1735163953Srrs /* warning, we re-use sin, sin6, sa_store here! */ 1736163953Srrs /* pull in local_address (our "from" address) */ 1737163953Srrs if (cookie->laddr_type == SCTP_IPV4_ADDRESS) { 1738163953Srrs /* source addr is IPv4 */ 1739163953Srrs sin = (struct sockaddr_in *)initack_src; 1740163953Srrs memset(sin, 0, sizeof(*sin)); 1741163953Srrs sin->sin_family = AF_INET; 1742163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 1743163953Srrs sin->sin_addr.s_addr = cookie->laddress[0]; 1744163953Srrs } else if (cookie->laddr_type == SCTP_IPV6_ADDRESS) { 1745163953Srrs /* source addr is IPv6 */ 1746163953Srrs sin6 = (struct sockaddr_in6 *)initack_src; 1747163953Srrs memset(sin6, 0, sizeof(*sin6)); 1748163953Srrs sin6->sin6_family = AF_INET6; 1749163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1750163953Srrs sin6->sin6_scope_id = cookie->scope_id; 1751163953Srrs memcpy(&sin6->sin6_addr, cookie->laddress, 1752163953Srrs sizeof(sin6->sin6_addr)); 1753163953Srrs } else { 1754170140Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1755165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_19); 1756170140Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1757163953Srrs return (NULL); 1758163953Srrs } 1759163953Srrs 1760163953Srrs sctp_check_address_list(stcb, m, 1761163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1762163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)), 1763163953Srrs initack_src, cookie->local_scope, cookie->site_scope, 1764163953Srrs cookie->ipv4_scope, cookie->loopback_scope); 1765163953Srrs 1766163953Srrs 1767163953Srrs /* set up to notify upper layer */ 1768163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1769163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1770163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1771163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1772163953Srrs /* 1773163953Srrs * This is an endpoint that called connect() how it got a 1774163953Srrs * cookie that is NEW is a bit of a mystery. It must be that 1775163953Srrs * the INIT was sent, but before it got there.. a complete 1776163953Srrs * INIT/INIT-ACK/COOKIE arrived. But of course then it 1777163953Srrs * should have went to the other code.. not here.. oh well.. 1778163953Srrs * a bit of protection is worth having.. 1779163953Srrs */ 1780163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1781163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1782163953Srrs } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 1783163953Srrs (inp->sctp_socket->so_qlimit)) { 1784163953Srrs /* 1785163953Srrs * We don't want to do anything with this one. Since it is 1786163953Srrs * the listening guy. The timer will get started for 1787163953Srrs * accepted connections in the caller. 1788163953Srrs */ 1789163953Srrs ; 1790163953Srrs } 1791163953Srrs /* since we did not send a HB make sure we don't double things */ 1792169420Srrs if ((netp) && (*netp)) 1793169420Srrs (*netp)->hb_responded = 1; 1794163953Srrs 1795163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1796163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1797163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL); 1798163953Srrs } 1799163953Srrs /* respond with a COOKIE-ACK */ 1800165220Srrs /* calculate the RTT */ 1801171440Srrs (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1802170642Srrs if ((netp) && (*netp)) { 1803169420Srrs (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp, 1804169420Srrs &cookie->time_entered); 1805170642Srrs } 1806163953Srrs sctp_send_cookie_ack(stcb); 1807163953Srrs return (stcb); 1808163953Srrs} 1809163953Srrs 1810163953Srrs 1811163953Srrs/* 1812163953Srrs * handles a COOKIE-ECHO message stcb: modified to either a new or left as 1813163953Srrs * existing (non-NULL) TCB 1814163953Srrs */ 1815163953Srrsstatic struct mbuf * 1816163953Srrssctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset, 1817163953Srrs struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp, 1818163953Srrs struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp, 1819169352Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len, 1820170181Srrs struct sctp_tcb **locked_tcb, uint32_t vrf_id) 1821163953Srrs{ 1822163953Srrs struct sctp_state_cookie *cookie; 1823163953Srrs struct sockaddr_in6 sin6; 1824163953Srrs struct sockaddr_in sin; 1825163953Srrs struct sctp_tcb *l_stcb = *stcb; 1826163953Srrs struct sctp_inpcb *l_inp; 1827163953Srrs struct sockaddr *to; 1828163953Srrs sctp_assoc_t sac_restart_id; 1829163953Srrs struct sctp_pcb *ep; 1830163953Srrs struct mbuf *m_sig; 1831163953Srrs uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE]; 1832163953Srrs uint8_t *sig; 1833163953Srrs uint8_t cookie_ok = 0; 1834163953Srrs unsigned int size_of_pkt, sig_offset, cookie_offset; 1835163953Srrs unsigned int cookie_len; 1836163953Srrs struct timeval now; 1837163953Srrs struct timeval time_expires; 1838163953Srrs struct sockaddr_storage dest_store; 1839163953Srrs struct sockaddr *localep_sa = (struct sockaddr *)&dest_store; 1840163953Srrs struct ip *iph; 1841163953Srrs int notification = 0; 1842163953Srrs struct sctp_nets *netl; 1843163953Srrs int had_a_existing_tcb = 0; 1844163953Srrs 1845169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 1846169420Srrs "sctp_handle_cookie: handling COOKIE-ECHO\n"); 1847163953Srrs 1848163953Srrs if (inp_p == NULL) { 1849163953Srrs return (NULL); 1850163953Srrs } 1851163953Srrs /* First get the destination address setup too. */ 1852163953Srrs iph = mtod(m, struct ip *); 1853163953Srrs if (iph->ip_v == IPVERSION) { 1854163953Srrs /* its IPv4 */ 1855170140Srrs struct sockaddr_in *lsin; 1856163953Srrs 1857170140Srrs lsin = (struct sockaddr_in *)(localep_sa); 1858170140Srrs memset(lsin, 0, sizeof(*lsin)); 1859170140Srrs lsin->sin_family = AF_INET; 1860170140Srrs lsin->sin_len = sizeof(*lsin); 1861170140Srrs lsin->sin_port = sh->dest_port; 1862170140Srrs lsin->sin_addr.s_addr = iph->ip_dst.s_addr; 1863165647Srrs size_of_pkt = SCTP_GET_IPV4_LENGTH(iph); 1864163953Srrs } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1865163953Srrs /* its IPv6 */ 1866163953Srrs struct ip6_hdr *ip6; 1867170140Srrs struct sockaddr_in6 *lsin6; 1868163953Srrs 1869170140Srrs lsin6 = (struct sockaddr_in6 *)(localep_sa); 1870170140Srrs memset(lsin6, 0, sizeof(*lsin6)); 1871170140Srrs lsin6->sin6_family = AF_INET6; 1872170140Srrs lsin6->sin6_len = sizeof(struct sockaddr_in6); 1873163953Srrs ip6 = mtod(m, struct ip6_hdr *); 1874170140Srrs lsin6->sin6_port = sh->dest_port; 1875170140Srrs lsin6->sin6_addr = ip6->ip6_dst; 1876166675Srrs size_of_pkt = SCTP_GET_IPV6_LENGTH(ip6) + iphlen; 1877163953Srrs } else { 1878163953Srrs return (NULL); 1879163953Srrs } 1880163953Srrs 1881163953Srrs cookie = &cp->cookie; 1882163953Srrs cookie_offset = offset + sizeof(struct sctp_chunkhdr); 1883163953Srrs cookie_len = ntohs(cp->ch.chunk_length); 1884163953Srrs 1885163953Srrs if ((cookie->peerport != sh->src_port) && 1886163953Srrs (cookie->myport != sh->dest_port) && 1887163953Srrs (cookie->my_vtag != sh->v_tag)) { 1888163953Srrs /* 1889163953Srrs * invalid ports or bad tag. Note that we always leave the 1890163953Srrs * v_tag in the header in network order and when we stored 1891163953Srrs * it in the my_vtag slot we also left it in network order. 1892169352Srrs * This maintains the match even though it may be in the 1893163953Srrs * opposite byte order of the machine :-> 1894163953Srrs */ 1895163953Srrs return (NULL); 1896163953Srrs } 1897163953Srrs if (cookie_len > size_of_pkt || 1898163953Srrs cookie_len < sizeof(struct sctp_cookie_echo_chunk) + 1899163953Srrs sizeof(struct sctp_init_chunk) + 1900163953Srrs sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) { 1901163953Srrs /* cookie too long! or too small */ 1902163953Srrs return (NULL); 1903163953Srrs } 1904163953Srrs /* 1905163953Srrs * split off the signature into its own mbuf (since it should not be 1906163953Srrs * calculated in the sctp_hmac_m() call). 1907163953Srrs */ 1908163953Srrs sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE; 1909163953Srrs if (sig_offset > size_of_pkt) { 1910163953Srrs /* packet not correct size! */ 1911163953Srrs /* XXX this may already be accounted for earlier... */ 1912163953Srrs return (NULL); 1913163953Srrs } 1914163953Srrs m_sig = m_split(m, sig_offset, M_DONTWAIT); 1915163953Srrs if (m_sig == NULL) { 1916163953Srrs /* out of memory or ?? */ 1917163953Srrs return (NULL); 1918163953Srrs } 1919163953Srrs /* 1920163953Srrs * compute the signature/digest for the cookie 1921163953Srrs */ 1922163953Srrs ep = &(*inp_p)->sctp_ep; 1923163953Srrs l_inp = *inp_p; 1924163953Srrs if (l_stcb) { 1925163953Srrs SCTP_TCB_UNLOCK(l_stcb); 1926163953Srrs } 1927163953Srrs SCTP_INP_RLOCK(l_inp); 1928163953Srrs if (l_stcb) { 1929163953Srrs SCTP_TCB_LOCK(l_stcb); 1930163953Srrs } 1931163953Srrs /* which cookie is it? */ 1932163953Srrs if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) && 1933163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1934163953Srrs /* it's the old cookie */ 1935169378Srrs (void)sctp_hmac_m(SCTP_HMAC, 1936163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1937170462Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0); 1938163953Srrs } else { 1939163953Srrs /* it's the current cookie */ 1940169378Srrs (void)sctp_hmac_m(SCTP_HMAC, 1941163953Srrs (uint8_t *) ep->secret_key[(int)ep->current_secret_number], 1942170462Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0); 1943163953Srrs } 1944163953Srrs /* get the signature */ 1945163953Srrs SCTP_INP_RUNLOCK(l_inp); 1946163953Srrs sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig); 1947163953Srrs if (sig == NULL) { 1948163953Srrs /* couldn't find signature */ 1949164085Srrs sctp_m_freem(m_sig); 1950163953Srrs return (NULL); 1951163953Srrs } 1952163953Srrs /* compare the received digest with the computed digest */ 1953163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) { 1954163953Srrs /* try the old cookie? */ 1955163953Srrs if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) && 1956163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1957163953Srrs /* compute digest with old */ 1958169378Srrs (void)sctp_hmac_m(SCTP_HMAC, 1959163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1960170462Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0); 1961163953Srrs /* compare */ 1962163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0) 1963163953Srrs cookie_ok = 1; 1964163953Srrs } 1965163953Srrs } else { 1966163953Srrs cookie_ok = 1; 1967163953Srrs } 1968163953Srrs 1969163953Srrs /* 1970163953Srrs * Now before we continue we must reconstruct our mbuf so that 1971163953Srrs * normal processing of any other chunks will work. 1972163953Srrs */ 1973163953Srrs { 1974163953Srrs struct mbuf *m_at; 1975163953Srrs 1976163953Srrs m_at = m; 1977165647Srrs while (SCTP_BUF_NEXT(m_at) != NULL) { 1978165647Srrs m_at = SCTP_BUF_NEXT(m_at); 1979163953Srrs } 1980165647Srrs SCTP_BUF_NEXT(m_at) = m_sig; 1981163953Srrs } 1982163953Srrs 1983163953Srrs if (cookie_ok == 0) { 1984169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n"); 1985169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 1986169420Srrs "offset = %u, cookie_offset = %u, sig_offset = %u\n", 1987169420Srrs (uint32_t) offset, cookie_offset, sig_offset); 1988163953Srrs return (NULL); 1989163953Srrs } 1990163953Srrs /* 1991163953Srrs * check the cookie timestamps to be sure it's not stale 1992163953Srrs */ 1993169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 1994163953Srrs /* Expire time is in Ticks, so we convert to seconds */ 1995169655Srrs time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life); 1996163953Srrs time_expires.tv_usec = cookie->time_entered.tv_usec; 1997163953Srrs if (timevalcmp(&now, &time_expires, >)) { 1998163953Srrs /* cookie is stale! */ 1999163953Srrs struct mbuf *op_err; 2000163953Srrs struct sctp_stale_cookie_msg *scm; 2001163953Srrs uint32_t tim; 2002163953Srrs 2003163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_stale_cookie_msg), 2004165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 2005163953Srrs if (op_err == NULL) { 2006163953Srrs /* FOOBAR */ 2007163953Srrs return (NULL); 2008163953Srrs } 2009163953Srrs /* pre-reserve some space */ 2010165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 2011165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 2012165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 2013163953Srrs 2014163953Srrs /* Set the len */ 2015165647Srrs SCTP_BUF_LEN(op_err) = sizeof(struct sctp_stale_cookie_msg); 2016163953Srrs scm = mtod(op_err, struct sctp_stale_cookie_msg *); 2017163953Srrs scm->ph.param_type = htons(SCTP_CAUSE_STALE_COOKIE); 2018163953Srrs scm->ph.param_length = htons((sizeof(struct sctp_paramhdr) + 2019163953Srrs (sizeof(uint32_t)))); 2020163953Srrs /* seconds to usec */ 2021163953Srrs tim = (now.tv_sec - time_expires.tv_sec) * 1000000; 2022163953Srrs /* add in usec */ 2023163953Srrs if (tim == 0) 2024163953Srrs tim = now.tv_usec - cookie->time_entered.tv_usec; 2025163953Srrs scm->time_usec = htonl(tim); 2026169352Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag, 2027170181Srrs vrf_id); 2028163953Srrs return (NULL); 2029163953Srrs } 2030163953Srrs /* 2031163953Srrs * Now we must see with the lookup address if we have an existing 2032163953Srrs * asoc. This will only happen if we were in the COOKIE-WAIT state 2033163953Srrs * and a INIT collided with us and somewhere the peer sent the 2034163953Srrs * cookie on another address besides the single address our assoc 2035163953Srrs * had for him. In this case we will have one of the tie-tags set at 2036163953Srrs * least AND the address field in the cookie can be used to look it 2037163953Srrs * up. 2038163953Srrs */ 2039163953Srrs to = NULL; 2040163953Srrs if (cookie->addr_type == SCTP_IPV6_ADDRESS) { 2041163953Srrs memset(&sin6, 0, sizeof(sin6)); 2042163953Srrs sin6.sin6_family = AF_INET6; 2043163953Srrs sin6.sin6_len = sizeof(sin6); 2044163953Srrs sin6.sin6_port = sh->src_port; 2045163953Srrs sin6.sin6_scope_id = cookie->scope_id; 2046163953Srrs memcpy(&sin6.sin6_addr.s6_addr, cookie->address, 2047163953Srrs sizeof(sin6.sin6_addr.s6_addr)); 2048163953Srrs to = (struct sockaddr *)&sin6; 2049163953Srrs } else if (cookie->addr_type == SCTP_IPV4_ADDRESS) { 2050163953Srrs memset(&sin, 0, sizeof(sin)); 2051163953Srrs sin.sin_family = AF_INET; 2052163953Srrs sin.sin_len = sizeof(sin); 2053163953Srrs sin.sin_port = sh->src_port; 2054163953Srrs sin.sin_addr.s_addr = cookie->address[0]; 2055163953Srrs to = (struct sockaddr *)&sin; 2056169420Srrs } else { 2057169420Srrs /* This should not happen */ 2058169420Srrs return (NULL); 2059163953Srrs } 2060163953Srrs if ((*stcb == NULL) && to) { 2061163953Srrs /* Yep, lets check */ 2062163953Srrs *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, localep_sa, NULL); 2063163953Srrs if (*stcb == NULL) { 2064163953Srrs /* 2065163953Srrs * We should have only got back the same inp. If we 2066163953Srrs * got back a different ep we have a problem. The 2067163953Srrs * original findep got back l_inp and now 2068163953Srrs */ 2069163953Srrs if (l_inp != *inp_p) { 2070169420Srrs SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n"); 2071163953Srrs } 2072165220Srrs } else { 2073165220Srrs if (*locked_tcb == NULL) { 2074165220Srrs /* 2075165220Srrs * In this case we found the assoc only 2076165220Srrs * after we locked the create lock. This 2077165220Srrs * means we are in a colliding case and we 2078165220Srrs * must make sure that we unlock the tcb if 2079165220Srrs * its one of the cases where we throw away 2080165220Srrs * the incoming packets. 2081165220Srrs */ 2082165220Srrs *locked_tcb = *stcb; 2083165220Srrs 2084165220Srrs /* 2085165220Srrs * We must also increment the inp ref count 2086165220Srrs * since the ref_count flags was set when we 2087165220Srrs * did not find the TCB, now we found it 2088165220Srrs * which reduces the refcount.. we must 2089165220Srrs * raise it back out to balance it all :-) 2090165220Srrs */ 2091165220Srrs SCTP_INP_INCR_REF((*stcb)->sctp_ep); 2092165220Srrs if ((*stcb)->sctp_ep != l_inp) { 2093169420Srrs SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n", 2094165220Srrs (*stcb)->sctp_ep, l_inp); 2095165220Srrs } 2096165220Srrs } 2097163953Srrs } 2098163953Srrs } 2099169420Srrs if (to == NULL) 2100169420Srrs return (NULL); 2101169420Srrs 2102163953Srrs cookie_len -= SCTP_SIGNATURE_SIZE; 2103163953Srrs if (*stcb == NULL) { 2104163953Srrs /* this is the "normal" case... get a new TCB */ 2105163953Srrs *stcb = sctp_process_cookie_new(m, iphlen, offset, sh, cookie, 2106163953Srrs cookie_len, *inp_p, netp, to, ¬ification, 2107170181Srrs auth_skipped, auth_offset, auth_len, vrf_id); 2108163953Srrs } else { 2109163953Srrs /* this is abnormal... cookie-echo on existing TCB */ 2110163953Srrs had_a_existing_tcb = 1; 2111163953Srrs *stcb = sctp_process_cookie_existing(m, iphlen, offset, sh, 2112170181Srrs cookie, cookie_len, *inp_p, *stcb, *netp, to, 2113170181Srrs ¬ification, &sac_restart_id, vrf_id); 2114163953Srrs } 2115163953Srrs 2116163953Srrs if (*stcb == NULL) { 2117163953Srrs /* still no TCB... must be bad cookie-echo */ 2118163953Srrs return (NULL); 2119163953Srrs } 2120163953Srrs /* 2121163953Srrs * Ok, we built an association so confirm the address we sent the 2122163953Srrs * INIT-ACK to. 2123163953Srrs */ 2124163953Srrs netl = sctp_findnet(*stcb, to); 2125163953Srrs /* 2126163953Srrs * This code should in theory NOT run but 2127163953Srrs */ 2128163953Srrs if (netl == NULL) { 2129163953Srrs /* TSNH! Huh, why do I need to add this address here? */ 2130163953Srrs int ret; 2131163953Srrs 2132165220Srrs ret = sctp_add_remote_addr(*stcb, to, SCTP_DONOT_SETSCOPE, 2133165220Srrs SCTP_IN_COOKIE_PROC); 2134163953Srrs netl = sctp_findnet(*stcb, to); 2135163953Srrs } 2136163953Srrs if (netl) { 2137163953Srrs if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) { 2138163953Srrs netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 2139169420Srrs (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL, 2140163953Srrs netl); 2141163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 2142163953Srrs (*stcb), 0, (void *)netl); 2143163953Srrs } 2144163953Srrs } 2145163953Srrs if (*stcb) { 2146163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, *inp_p, 2147163953Srrs *stcb, NULL); 2148163953Srrs } 2149163953Srrs if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 2150163953Srrs if (!had_a_existing_tcb || 2151163953Srrs (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 2152163953Srrs /* 2153163953Srrs * If we have a NEW cookie or the connect never 2154163953Srrs * reached the connected state during collision we 2155163953Srrs * must do the TCP accept thing. 2156163953Srrs */ 2157163953Srrs struct socket *so, *oso; 2158163953Srrs struct sctp_inpcb *inp; 2159163953Srrs 2160163953Srrs if (notification == SCTP_NOTIFY_ASSOC_RESTART) { 2161163953Srrs /* 2162163953Srrs * For a restart we will keep the same 2163163953Srrs * socket, no need to do anything. I THINK!! 2164163953Srrs */ 2165163953Srrs sctp_ulp_notify(notification, *stcb, 0, (void *)&sac_restart_id); 2166163953Srrs return (m); 2167163953Srrs } 2168163953Srrs oso = (*inp_p)->sctp_socket; 2169163953Srrs /* 2170163953Srrs * We do this to keep the sockets side happy durin 2171163953Srrs * the sonewcon ONLY. 2172163953Srrs */ 2173163953Srrs NET_LOCK_GIANT(); 2174163953Srrs SCTP_TCB_UNLOCK((*stcb)); 2175166086Srrs so = sonewconn(oso, 0 2176163953Srrs ); 2177163953Srrs NET_UNLOCK_GIANT(); 2178163953Srrs SCTP_INP_WLOCK((*stcb)->sctp_ep); 2179163953Srrs SCTP_TCB_LOCK((*stcb)); 2180163953Srrs SCTP_INP_WUNLOCK((*stcb)->sctp_ep); 2181163953Srrs if (so == NULL) { 2182163953Srrs struct mbuf *op_err; 2183163953Srrs 2184163953Srrs /* Too many sockets */ 2185169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n"); 2186163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 2187163953Srrs sctp_abort_association(*inp_p, NULL, m, iphlen, 2188170181Srrs sh, op_err, vrf_id); 2189165220Srrs sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_20); 2190163953Srrs return (NULL); 2191163953Srrs } 2192163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 2193166086Srrs SCTP_INP_INCR_REF(inp); 2194166086Srrs /* 2195166086Srrs * We add the unbound flag here so that if we get an 2196166086Srrs * soabort() before we get the move_pcb done, we 2197166086Srrs * will properly cleanup. 2198166086Srrs */ 2199163953Srrs inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2200163953Srrs SCTP_PCB_FLAGS_CONNECTED | 2201163953Srrs SCTP_PCB_FLAGS_IN_TCPPOOL | 2202166086Srrs SCTP_PCB_FLAGS_UNBOUND | 2203163953Srrs (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) | 2204163953Srrs SCTP_PCB_FLAGS_DONT_WAKE); 2205163953Srrs inp->sctp_features = (*inp_p)->sctp_features; 2206163953Srrs inp->sctp_socket = so; 2207163953Srrs inp->sctp_frag_point = (*inp_p)->sctp_frag_point; 2208163953Srrs inp->partial_delivery_point = (*inp_p)->partial_delivery_point; 2209163953Srrs inp->sctp_context = (*inp_p)->sctp_context; 2210163953Srrs inp->inp_starting_point_for_iterator = NULL; 2211163953Srrs /* 2212163953Srrs * copy in the authentication parameters from the 2213163953Srrs * original endpoint 2214163953Srrs */ 2215163953Srrs if (inp->sctp_ep.local_hmacs) 2216163953Srrs sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2217163953Srrs inp->sctp_ep.local_hmacs = 2218163953Srrs sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs); 2219163953Srrs if (inp->sctp_ep.local_auth_chunks) 2220163953Srrs sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2221163953Srrs inp->sctp_ep.local_auth_chunks = 2222163953Srrs sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks); 2223163953Srrs (void)sctp_copy_skeylist(&(*inp_p)->sctp_ep.shared_keys, 2224163953Srrs &inp->sctp_ep.shared_keys); 2225163953Srrs 2226163953Srrs /* 2227163953Srrs * Now we must move it from one hash table to 2228163953Srrs * another and get the tcb in the right place. 2229163953Srrs */ 2230163953Srrs sctp_move_pcb_and_assoc(*inp_p, inp, *stcb); 2231170056Srrs 2232170056Srrs atomic_add_int(&(*stcb)->asoc.refcnt, 1); 2233170056Srrs SCTP_TCB_UNLOCK((*stcb)); 2234170056Srrs 2235169208Srrs sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb, M_NOWAIT); 2236170056Srrs SCTP_TCB_LOCK((*stcb)); 2237170056Srrs atomic_subtract_int(&(*stcb)->asoc.refcnt, 1); 2238163953Srrs 2239170056Srrs 2240166086Srrs /* 2241166086Srrs * now we must check to see if we were aborted while 2242166086Srrs * the move was going on and the lock/unlock 2243166086Srrs * happened. 2244166086Srrs */ 2245166086Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 2246166086Srrs /* 2247166086Srrs * yep it was, we leave the assoc attached 2248166086Srrs * to the socket since the sctp_inpcb_free() 2249166086Srrs * call will send an abort for us. 2250166086Srrs */ 2251166086Srrs SCTP_INP_DECR_REF(inp); 2252166086Srrs return (NULL); 2253166086Srrs } 2254166086Srrs SCTP_INP_DECR_REF(inp); 2255163953Srrs /* Switch over to the new guy */ 2256163953Srrs *inp_p = inp; 2257166086Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2258163953Srrs 2259166086Srrs /* 2260166086Srrs * Pull it from the incomplete queue and wake the 2261166086Srrs * guy 2262166086Srrs */ 2263166086Srrs soisconnected(so); 2264163953Srrs return (m); 2265163953Srrs } 2266163953Srrs } 2267163953Srrs if ((notification) && ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) { 2268163953Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2269163953Srrs } 2270163953Srrs return (m); 2271163953Srrs} 2272163953Srrs 2273163953Srrsstatic void 2274163953Srrssctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp, 2275163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2276163953Srrs{ 2277163953Srrs /* cp must not be used, others call this without a c-ack :-) */ 2278163953Srrs struct sctp_association *asoc; 2279163953Srrs 2280169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 2281169420Srrs "sctp_handle_cookie_ack: handling COOKIE-ACK\n"); 2282163953Srrs if (stcb == NULL) 2283163953Srrs return; 2284163953Srrs 2285163953Srrs asoc = &stcb->asoc; 2286163953Srrs 2287163953Srrs sctp_stop_all_cookie_timers(stcb); 2288163953Srrs /* process according to association state */ 2289163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 2290163953Srrs /* state change only needed when I am in right state */ 2291169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n"); 2292163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 2293163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 2294163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 2295163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 2296163953Srrs 2297163953Srrs } else { 2298163953Srrs asoc->state = SCTP_STATE_OPEN; 2299163953Srrs } 2300163953Srrs /* update RTO */ 2301163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 2302163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 2303163953Srrs if (asoc->overall_error_count == 0) { 2304163953Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, 2305163953Srrs &asoc->time_entered); 2306163953Srrs } 2307169378Srrs (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 2308163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL); 2309163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 2310163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 2311163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 2312163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 2313163953Srrs } 2314163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 2315163953Srrs stcb, net); 2316163953Srrs /* 2317163953Srrs * since we did not send a HB make sure we don't double 2318163953Srrs * things 2319163953Srrs */ 2320163953Srrs net->hb_responded = 1; 2321163953Srrs 2322163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 2323163953Srrs sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) { 2324163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 2325163953Srrs stcb->sctp_ep, stcb, NULL); 2326163953Srrs } 2327163953Srrs /* 2328163953Srrs * set ASCONF timer if ASCONFs are pending and allowed (eg. 2329163953Srrs * addresses changed when init/cookie echo in flight) 2330163953Srrs */ 2331163953Srrs if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) && 2332163953Srrs (stcb->asoc.peer_supports_asconf) && 2333163953Srrs (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) { 2334163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2335163953Srrs stcb->sctp_ep, stcb, 2336163953Srrs stcb->asoc.primary_destination); 2337163953Srrs } 2338163953Srrs } 2339163953Srrs /* Toss the cookie if I can */ 2340163953Srrs sctp_toss_old_cookies(stcb, asoc); 2341163953Srrs if (!TAILQ_EMPTY(&asoc->sent_queue)) { 2342163953Srrs /* Restart the timer if we have pending data */ 2343163953Srrs struct sctp_tmit_chunk *chk; 2344163953Srrs 2345163953Srrs chk = TAILQ_FIRST(&asoc->sent_queue); 2346163953Srrs if (chk) { 2347163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2348163953Srrs stcb, chk->whoTo); 2349163953Srrs } 2350163953Srrs } 2351163953Srrs} 2352163953Srrs 2353163953Srrsstatic void 2354163953Srrssctp_handle_ecn_echo(struct sctp_ecne_chunk *cp, 2355163953Srrs struct sctp_tcb *stcb) 2356163953Srrs{ 2357163953Srrs struct sctp_nets *net; 2358163953Srrs struct sctp_tmit_chunk *lchk; 2359163953Srrs uint32_t tsn; 2360163953Srrs 2361163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_ecne_chunk)) { 2362163953Srrs return; 2363163953Srrs } 2364163953Srrs SCTP_STAT_INCR(sctps_recvecne); 2365163953Srrs tsn = ntohl(cp->tsn); 2366163953Srrs /* ECN Nonce stuff: need a resync and disable the nonce sum check */ 2367163953Srrs /* Also we make sure we disable the nonce_wait */ 2368163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.send_queue); 2369163953Srrs if (lchk == NULL) { 2370163953Srrs stcb->asoc.nonce_resync_tsn = stcb->asoc.sending_seq; 2371163953Srrs } else { 2372163953Srrs stcb->asoc.nonce_resync_tsn = lchk->rec.data.TSN_seq; 2373163953Srrs } 2374163953Srrs stcb->asoc.nonce_wait_for_ecne = 0; 2375163953Srrs stcb->asoc.nonce_sum_check = 0; 2376163953Srrs 2377163953Srrs /* Find where it was sent, if possible */ 2378163953Srrs net = NULL; 2379163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.sent_queue); 2380163953Srrs while (lchk) { 2381163953Srrs if (lchk->rec.data.TSN_seq == tsn) { 2382163953Srrs net = lchk->whoTo; 2383163953Srrs break; 2384163953Srrs } 2385163953Srrs if (compare_with_wrap(lchk->rec.data.TSN_seq, tsn, MAX_SEQ)) 2386163953Srrs break; 2387163953Srrs lchk = TAILQ_NEXT(lchk, sctp_next); 2388163953Srrs } 2389163953Srrs if (net == NULL) 2390163953Srrs /* default is we use the primary */ 2391163953Srrs net = stcb->asoc.primary_destination; 2392163953Srrs 2393163953Srrs if (compare_with_wrap(tsn, stcb->asoc.last_cwr_tsn, MAX_TSN)) { 2394163953Srrs /* 2395171440Srrs * JRS - Use the congestion control given in the pluggable 2396171440Srrs * CC module 2397171440Srrs */ 2398171440Srrs stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net); 2399171440Srrs /* 2400163953Srrs * we reduce once every RTT. So we will only lower cwnd at 2401163953Srrs * the next sending seq i.e. the resync_tsn. 2402163953Srrs */ 2403163953Srrs stcb->asoc.last_cwr_tsn = stcb->asoc.nonce_resync_tsn; 2404163953Srrs } 2405163953Srrs /* 2406163953Srrs * We always send a CWR this way if our previous one was lost our 2407163953Srrs * peer will get an update, or if it is not time again to reduce we 2408163953Srrs * still get the cwr to the peer. 2409163953Srrs */ 2410163953Srrs sctp_send_cwr(stcb, net, tsn); 2411163953Srrs} 2412163953Srrs 2413163953Srrsstatic void 2414163953Srrssctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb) 2415163953Srrs{ 2416163953Srrs /* 2417163953Srrs * Here we get a CWR from the peer. We must look in the outqueue and 2418163953Srrs * make sure that we have a covered ECNE in teh control chunk part. 2419163953Srrs * If so remove it. 2420163953Srrs */ 2421163953Srrs struct sctp_tmit_chunk *chk; 2422163953Srrs struct sctp_ecne_chunk *ecne; 2423163953Srrs 2424163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 2425163953Srrs if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) { 2426163953Srrs continue; 2427163953Srrs } 2428163953Srrs /* 2429163953Srrs * Look for and remove if it is the right TSN. Since there 2430163953Srrs * is only ONE ECNE on the control queue at any one time we 2431163953Srrs * don't need to worry about more than one! 2432163953Srrs */ 2433163953Srrs ecne = mtod(chk->data, struct sctp_ecne_chunk *); 2434163953Srrs if (compare_with_wrap(ntohl(cp->tsn), ntohl(ecne->tsn), 2435163953Srrs MAX_TSN) || (cp->tsn == ecne->tsn)) { 2436163953Srrs /* this covers this ECNE, we can remove it */ 2437163953Srrs stcb->asoc.ecn_echo_cnt_onq--; 2438163953Srrs TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, 2439163953Srrs sctp_next); 2440163953Srrs if (chk->data) { 2441163953Srrs sctp_m_freem(chk->data); 2442163953Srrs chk->data = NULL; 2443163953Srrs } 2444163953Srrs stcb->asoc.ctrl_queue_cnt--; 2445163953Srrs sctp_free_a_chunk(stcb, chk); 2446163953Srrs break; 2447163953Srrs } 2448163953Srrs } 2449163953Srrs} 2450163953Srrs 2451163953Srrsstatic void 2452163953Srrssctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp, 2453163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2454163953Srrs{ 2455163953Srrs struct sctp_association *asoc; 2456163953Srrs 2457169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 2458169420Srrs "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n"); 2459163953Srrs if (stcb == NULL) 2460163953Srrs return; 2461163953Srrs 2462163953Srrs asoc = &stcb->asoc; 2463163953Srrs /* process according to association state */ 2464163953Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) { 2465163953Srrs /* unexpected SHUTDOWN-COMPLETE... so ignore... */ 2466163953Srrs SCTP_TCB_UNLOCK(stcb); 2467163953Srrs return; 2468163953Srrs } 2469163953Srrs /* notify upper layer protocol */ 2470163953Srrs if (stcb->sctp_socket) { 2471163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 2472163953Srrs /* are the queues empty? they should be */ 2473163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 2474163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 2475163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 2476164205Srrs sctp_report_all_outbound(stcb, 0); 2477163953Srrs } 2478163953Srrs } 2479163953Srrs /* stop the timer */ 2480171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_22); 2481163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 2482163953Srrs /* free the TCB */ 2483171440Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_23); 2484163953Srrs return; 2485163953Srrs} 2486163953Srrs 2487163953Srrsstatic int 2488163953Srrsprocess_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc, 2489163953Srrs struct sctp_nets *net, uint8_t flg) 2490163953Srrs{ 2491163953Srrs switch (desc->chunk_type) { 2492163953Srrs case SCTP_DATA: 2493163953Srrs /* find the tsn to resend (possibly */ 2494163953Srrs { 2495163953Srrs uint32_t tsn; 2496163953Srrs struct sctp_tmit_chunk *tp1; 2497163953Srrs 2498163953Srrs tsn = ntohl(desc->tsn_ifany); 2499163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2500163953Srrs while (tp1) { 2501163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2502163953Srrs /* found it */ 2503163953Srrs break; 2504163953Srrs } 2505163953Srrs if (compare_with_wrap(tp1->rec.data.TSN_seq, tsn, 2506163953Srrs MAX_TSN)) { 2507163953Srrs /* not found */ 2508163953Srrs tp1 = NULL; 2509163953Srrs break; 2510163953Srrs } 2511163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2512163953Srrs } 2513163953Srrs if (tp1 == NULL) { 2514163953Srrs /* 2515163953Srrs * Do it the other way , aka without paying 2516163953Srrs * attention to queue seq order. 2517163953Srrs */ 2518163953Srrs SCTP_STAT_INCR(sctps_pdrpdnfnd); 2519163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2520163953Srrs while (tp1) { 2521163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2522163953Srrs /* found it */ 2523163953Srrs break; 2524163953Srrs } 2525163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2526163953Srrs } 2527163953Srrs } 2528163953Srrs if (tp1 == NULL) { 2529163953Srrs SCTP_STAT_INCR(sctps_pdrptsnnf); 2530163953Srrs } 2531163953Srrs if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) { 2532163953Srrs uint8_t *ddp; 2533163953Srrs 2534163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 2535163953Srrs ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) { 2536163953Srrs SCTP_STAT_INCR(sctps_pdrpdiwnp); 2537163953Srrs return (0); 2538163953Srrs } 2539163953Srrs if (stcb->asoc.peers_rwnd == 0 && 2540163953Srrs (flg & SCTP_FROM_MIDDLE_BOX)) { 2541163953Srrs SCTP_STAT_INCR(sctps_pdrpdizrw); 2542163953Srrs return (0); 2543163953Srrs } 2544163953Srrs ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+ 2545163953Srrs sizeof(struct sctp_data_chunk)); 2546163953Srrs { 2547163953Srrs unsigned int iii; 2548163953Srrs 2549163953Srrs for (iii = 0; iii < sizeof(desc->data_bytes); 2550163953Srrs iii++) { 2551163953Srrs if (ddp[iii] != desc->data_bytes[iii]) { 2552163953Srrs SCTP_STAT_INCR(sctps_pdrpbadd); 2553163953Srrs return (-1); 2554163953Srrs } 2555163953Srrs } 2556163953Srrs } 2557163953Srrs /* 2558163953Srrs * We zero out the nonce so resync not 2559163953Srrs * needed 2560163953Srrs */ 2561163953Srrs tp1->rec.data.ect_nonce = 0; 2562163953Srrs 2563163953Srrs if (tp1->do_rtt) { 2564163953Srrs /* 2565163953Srrs * this guy had a RTO calculation 2566163953Srrs * pending on it, cancel it 2567163953Srrs */ 2568163953Srrs tp1->do_rtt = 0; 2569163953Srrs } 2570163953Srrs SCTP_STAT_INCR(sctps_pdrpmark); 2571163953Srrs if (tp1->sent != SCTP_DATAGRAM_RESEND) 2572163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2573163953Srrs tp1->sent = SCTP_DATAGRAM_RESEND; 2574163953Srrs /* 2575163953Srrs * mark it as if we were doing a FR, since 2576163953Srrs * we will be getting gap ack reports behind 2577163953Srrs * the info from the router. 2578163953Srrs */ 2579163953Srrs tp1->rec.data.doing_fast_retransmit = 1; 2580163953Srrs /* 2581163953Srrs * mark the tsn with what sequences can 2582163953Srrs * cause a new FR. 2583163953Srrs */ 2584163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 2585163953Srrs tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 2586163953Srrs } else { 2587163953Srrs tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 2588163953Srrs } 2589163953Srrs 2590163953Srrs /* restart the timer */ 2591163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2592171440Srrs stcb, tp1->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_24); 2593163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2594163953Srrs stcb, tp1->whoTo); 2595163953Srrs 2596163953Srrs /* fix counts and things */ 2597170744Srrs if (sctp_logging_level & SCTP_FLIGHT_LOGGING_ENABLE) { 2598170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP, 2599170744Srrs tp1->whoTo->flight_size, 2600170744Srrs tp1->book_size, 2601170744Srrs (uintptr_t) stcb, 2602170744Srrs tp1->rec.data.TSN_seq); 2603170744Srrs } 2604168709Srrs sctp_flight_size_decrease(tp1); 2605168709Srrs sctp_total_flight_decrease(stcb, tp1); 2606163953Srrs } { 2607163953Srrs /* audit code */ 2608163953Srrs unsigned int audit; 2609163953Srrs 2610163953Srrs audit = 0; 2611163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) { 2612163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2613163953Srrs audit++; 2614163953Srrs } 2615163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue, 2616163953Srrs sctp_next) { 2617163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2618163953Srrs audit++; 2619163953Srrs } 2620163953Srrs if (audit != stcb->asoc.sent_queue_retran_cnt) { 2621169420Srrs SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n", 2622163953Srrs audit, stcb->asoc.sent_queue_retran_cnt); 2623163953Srrs#ifndef SCTP_AUDITING_ENABLED 2624163953Srrs stcb->asoc.sent_queue_retran_cnt = audit; 2625163953Srrs#endif 2626163953Srrs } 2627163953Srrs } 2628163953Srrs } 2629163953Srrs break; 2630163953Srrs case SCTP_ASCONF: 2631163953Srrs { 2632163953Srrs struct sctp_tmit_chunk *asconf; 2633163953Srrs 2634163953Srrs TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue, 2635163953Srrs sctp_next) { 2636163953Srrs if (asconf->rec.chunk_id.id == SCTP_ASCONF) { 2637163953Srrs break; 2638163953Srrs } 2639163953Srrs } 2640163953Srrs if (asconf) { 2641163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 2642163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2643163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 2644163953Srrs asconf->snd_count--; 2645163953Srrs } 2646163953Srrs } 2647163953Srrs break; 2648163953Srrs case SCTP_INITIATION: 2649163953Srrs /* resend the INIT */ 2650163953Srrs stcb->asoc.dropped_special_cnt++; 2651163953Srrs if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) { 2652163953Srrs /* 2653163953Srrs * If we can get it in, in a few attempts we do 2654163953Srrs * this, otherwise we let the timer fire. 2655163953Srrs */ 2656163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, 2657171440Srrs stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_25); 2658163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 2659163953Srrs } 2660163953Srrs break; 2661163953Srrs case SCTP_SELECTIVE_ACK: 2662163953Srrs /* resend the sack */ 2663163953Srrs sctp_send_sack(stcb); 2664163953Srrs break; 2665163953Srrs case SCTP_HEARTBEAT_REQUEST: 2666163953Srrs /* resend a demand HB */ 2667171440Srrs if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) { 2668171440Srrs /* 2669171440Srrs * Only retransmit if we KNOW we wont destroy the 2670171440Srrs * tcb 2671171440Srrs */ 2672171440Srrs (void)sctp_send_hb(stcb, 1, net); 2673171440Srrs } 2674163953Srrs break; 2675163953Srrs case SCTP_SHUTDOWN: 2676163953Srrs sctp_send_shutdown(stcb, net); 2677163953Srrs break; 2678163953Srrs case SCTP_SHUTDOWN_ACK: 2679163953Srrs sctp_send_shutdown_ack(stcb, net); 2680163953Srrs break; 2681163953Srrs case SCTP_COOKIE_ECHO: 2682163953Srrs { 2683163953Srrs struct sctp_tmit_chunk *cookie; 2684163953Srrs 2685163953Srrs cookie = NULL; 2686163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, 2687163953Srrs sctp_next) { 2688163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 2689163953Srrs break; 2690163953Srrs } 2691163953Srrs } 2692163953Srrs if (cookie) { 2693163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) 2694163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2695163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 2696163953Srrs sctp_stop_all_cookie_timers(stcb); 2697163953Srrs } 2698163953Srrs } 2699163953Srrs break; 2700163953Srrs case SCTP_COOKIE_ACK: 2701163953Srrs sctp_send_cookie_ack(stcb); 2702163953Srrs break; 2703163953Srrs case SCTP_ASCONF_ACK: 2704163953Srrs /* resend last asconf ack */ 2705163953Srrs sctp_send_asconf_ack(stcb, 1); 2706163953Srrs break; 2707163953Srrs case SCTP_FORWARD_CUM_TSN: 2708163953Srrs send_forward_tsn(stcb, &stcb->asoc); 2709163953Srrs break; 2710163953Srrs /* can't do anything with these */ 2711163953Srrs case SCTP_PACKET_DROPPED: 2712163953Srrs case SCTP_INITIATION_ACK: /* this should not happen */ 2713163953Srrs case SCTP_HEARTBEAT_ACK: 2714163953Srrs case SCTP_ABORT_ASSOCIATION: 2715163953Srrs case SCTP_OPERATION_ERROR: 2716163953Srrs case SCTP_SHUTDOWN_COMPLETE: 2717163953Srrs case SCTP_ECN_ECHO: 2718163953Srrs case SCTP_ECN_CWR: 2719163953Srrs default: 2720163953Srrs break; 2721163953Srrs } 2722163953Srrs return (0); 2723163953Srrs} 2724163953Srrs 2725163953Srrsvoid 2726163953Srrssctp_reset_in_stream(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2727163953Srrs{ 2728163953Srrs int i; 2729163953Srrs uint16_t temp; 2730163953Srrs 2731163953Srrs /* 2732163953Srrs * We set things to 0xffff since this is the last delivered sequence 2733163953Srrs * and we will be sending in 0 after the reset. 2734163953Srrs */ 2735163953Srrs 2736163953Srrs if (number_entries) { 2737163953Srrs for (i = 0; i < number_entries; i++) { 2738163953Srrs temp = ntohs(list[i]); 2739163953Srrs if (temp >= stcb->asoc.streamincnt) { 2740163953Srrs continue; 2741163953Srrs } 2742163953Srrs stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff; 2743163953Srrs } 2744163953Srrs } else { 2745163953Srrs list = NULL; 2746163953Srrs for (i = 0; i < stcb->asoc.streamincnt; i++) { 2747163953Srrs stcb->asoc.strmin[i].last_sequence_delivered = 0xffff; 2748163953Srrs } 2749163953Srrs } 2750163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list); 2751163953Srrs} 2752163953Srrs 2753163953Srrsstatic void 2754163953Srrssctp_reset_out_streams(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2755163953Srrs{ 2756163953Srrs int i; 2757163953Srrs 2758163953Srrs if (number_entries == 0) { 2759163953Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 2760163953Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 2761163953Srrs } 2762163953Srrs } else if (number_entries) { 2763163953Srrs for (i = 0; i < number_entries; i++) { 2764163953Srrs uint16_t temp; 2765163953Srrs 2766163953Srrs temp = ntohs(list[i]); 2767163953Srrs if (temp >= stcb->asoc.streamoutcnt) { 2768163953Srrs /* no such stream */ 2769163953Srrs continue; 2770163953Srrs } 2771163953Srrs stcb->asoc.strmout[temp].next_sequence_sent = 0; 2772163953Srrs } 2773163953Srrs } 2774163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list); 2775163953Srrs} 2776163953Srrs 2777163953Srrs 2778163953Srrsstruct sctp_stream_reset_out_request * 2779163953Srrssctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk) 2780163953Srrs{ 2781163953Srrs struct sctp_association *asoc; 2782163953Srrs struct sctp_stream_reset_out_req *req; 2783163953Srrs struct sctp_stream_reset_out_request *r; 2784163953Srrs struct sctp_tmit_chunk *chk; 2785163953Srrs int len, clen; 2786163953Srrs 2787163953Srrs asoc = &stcb->asoc; 2788163953Srrs if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 2789169208Srrs asoc->stream_reset_outstanding = 0; 2790163953Srrs return (NULL); 2791163953Srrs } 2792163953Srrs if (stcb->asoc.str_reset == NULL) { 2793169208Srrs asoc->stream_reset_outstanding = 0; 2794163953Srrs return (NULL); 2795163953Srrs } 2796163953Srrs chk = stcb->asoc.str_reset; 2797163953Srrs if (chk->data == NULL) { 2798163953Srrs return (NULL); 2799163953Srrs } 2800163953Srrs if (bchk) { 2801163953Srrs /* he wants a copy of the chk pointer */ 2802163953Srrs *bchk = chk; 2803163953Srrs } 2804163953Srrs clen = chk->send_size; 2805163953Srrs req = mtod(chk->data, struct sctp_stream_reset_out_req *); 2806163953Srrs r = &req->sr_req; 2807163953Srrs if (ntohl(r->request_seq) == seq) { 2808163953Srrs /* found it */ 2809163953Srrs return (r); 2810163953Srrs } 2811163953Srrs len = SCTP_SIZE32(ntohs(r->ph.param_length)); 2812163953Srrs if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) { 2813163953Srrs /* move to the next one, there can only be a max of two */ 2814163953Srrs r = (struct sctp_stream_reset_out_request *)((caddr_t)r + len); 2815163953Srrs if (ntohl(r->request_seq) == seq) { 2816163953Srrs return (r); 2817163953Srrs } 2818163953Srrs } 2819163953Srrs /* that seq is not here */ 2820163953Srrs return (NULL); 2821163953Srrs} 2822163953Srrs 2823163953Srrsstatic void 2824163953Srrssctp_clean_up_stream_reset(struct sctp_tcb *stcb) 2825163953Srrs{ 2826163953Srrs struct sctp_association *asoc; 2827163953Srrs struct sctp_tmit_chunk *chk = stcb->asoc.str_reset; 2828163953Srrs 2829163953Srrs if (stcb->asoc.str_reset == NULL) { 2830163953Srrs return; 2831163953Srrs } 2832166675Srrs asoc = &stcb->asoc; 2833166675Srrs 2834171440Srrs sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_26); 2835163953Srrs TAILQ_REMOVE(&asoc->control_send_queue, 2836163953Srrs chk, 2837163953Srrs sctp_next); 2838163953Srrs if (chk->data) { 2839163953Srrs sctp_m_freem(chk->data); 2840163953Srrs chk->data = NULL; 2841163953Srrs } 2842163953Srrs asoc->ctrl_queue_cnt--; 2843163953Srrs sctp_free_a_chunk(stcb, chk); 2844163953Srrs stcb->asoc.str_reset = NULL; 2845163953Srrs} 2846163953Srrs 2847163953Srrs 2848163953Srrsstatic int 2849163953Srrssctp_handle_stream_reset_response(struct sctp_tcb *stcb, 2850163953Srrs uint32_t seq, uint32_t action, 2851164139Srrs struct sctp_stream_reset_response *respin) 2852163953Srrs{ 2853163953Srrs uint16_t type; 2854163953Srrs int lparm_len; 2855163953Srrs struct sctp_association *asoc = &stcb->asoc; 2856163953Srrs struct sctp_tmit_chunk *chk; 2857163953Srrs struct sctp_stream_reset_out_request *srparam; 2858163953Srrs int number_entries; 2859163953Srrs 2860163953Srrs if (asoc->stream_reset_outstanding == 0) { 2861163953Srrs /* duplicate */ 2862163953Srrs return (0); 2863163953Srrs } 2864163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 2865163953Srrs srparam = sctp_find_stream_reset(stcb, seq, &chk); 2866163953Srrs if (srparam) { 2867163953Srrs stcb->asoc.str_reset_seq_out++; 2868163953Srrs type = ntohs(srparam->ph.param_type); 2869163953Srrs lparm_len = ntohs(srparam->ph.param_length); 2870163953Srrs if (type == SCTP_STR_RESET_OUT_REQUEST) { 2871164139Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t); 2872163953Srrs asoc->stream_reset_out_is_outstanding = 0; 2873163953Srrs if (asoc->stream_reset_outstanding) 2874163953Srrs asoc->stream_reset_outstanding--; 2875163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2876163953Srrs /* do it */ 2877163953Srrs sctp_reset_out_streams(stcb, number_entries, srparam->list_of_streams); 2878163953Srrs } else { 2879163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, srparam->list_of_streams); 2880163953Srrs } 2881163953Srrs } else if (type == SCTP_STR_RESET_IN_REQUEST) { 2882163953Srrs /* Answered my request */ 2883164139Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t); 2884163953Srrs if (asoc->stream_reset_outstanding) 2885163953Srrs asoc->stream_reset_outstanding--; 2886163953Srrs if (action != SCTP_STREAM_RESET_PERFORMED) { 2887163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb, number_entries, srparam->list_of_streams); 2888163953Srrs } 2889163953Srrs } else if (type == SCTP_STR_RESET_TSN_REQUEST) { 2890163953Srrs /** 2891163953Srrs * a) Adopt the new in tsn. 2892163953Srrs * b) reset the map 2893163953Srrs * c) Adopt the new out-tsn 2894163953Srrs */ 2895163953Srrs struct sctp_stream_reset_response_tsn *resp; 2896163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2897163953Srrs int abort_flag = 0; 2898163953Srrs 2899163953Srrs if (respin == NULL) { 2900163953Srrs /* huh ? */ 2901163953Srrs return (0); 2902163953Srrs } 2903163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2904163953Srrs resp = (struct sctp_stream_reset_response_tsn *)respin; 2905163953Srrs asoc->stream_reset_outstanding--; 2906163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 2907163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 2908163953Srrs fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1); 2909170992Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0); 2910163953Srrs if (abort_flag) { 2911163953Srrs return (1); 2912163953Srrs } 2913163953Srrs stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1); 2914163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 2915163953Srrs stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn); 2916163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 2917163953Srrs stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn); 2918163953Srrs stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn; 2919163953Srrs 2920163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 2921163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 2922163953Srrs 2923163953Srrs } 2924163953Srrs } 2925163953Srrs /* get rid of the request and get the request flags */ 2926163953Srrs if (asoc->stream_reset_outstanding == 0) { 2927163953Srrs sctp_clean_up_stream_reset(stcb); 2928163953Srrs } 2929163953Srrs } 2930163953Srrs } 2931163953Srrs return (0); 2932163953Srrs} 2933163953Srrs 2934163953Srrsstatic void 2935163953Srrssctp_handle_str_reset_request_in(struct sctp_tcb *stcb, 2936163953Srrs struct sctp_tmit_chunk *chk, 2937170992Srrs struct sctp_stream_reset_in_request *req, int trunc) 2938163953Srrs{ 2939163953Srrs uint32_t seq; 2940163953Srrs int len, i; 2941163953Srrs int number_entries; 2942163953Srrs uint16_t temp; 2943163953Srrs 2944163953Srrs /* 2945163953Srrs * peer wants me to send a str-reset to him for my outgoing seq's if 2946163953Srrs * seq_in is right. 2947163953Srrs */ 2948163953Srrs struct sctp_association *asoc = &stcb->asoc; 2949163953Srrs 2950163953Srrs seq = ntohl(req->request_seq); 2951163953Srrs if (asoc->str_reset_seq_in == seq) { 2952170992Srrs if (trunc) { 2953170992Srrs /* Can't do it, since they exceeded our buffer size */ 2954170992Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2955170992Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_DENIED; 2956170992Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2957170992Srrs } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) { 2958163953Srrs len = ntohs(req->ph.param_length); 2959163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t)); 2960163953Srrs for (i = 0; i < number_entries; i++) { 2961163953Srrs temp = ntohs(req->list_of_streams[i]); 2962163953Srrs req->list_of_streams[i] = temp; 2963163953Srrs } 2964163953Srrs /* move the reset action back one */ 2965163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2966163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2967163953Srrs sctp_add_stream_reset_out(chk, number_entries, req->list_of_streams, 2968163953Srrs asoc->str_reset_seq_out, 2969163953Srrs seq, (asoc->sending_seq - 1)); 2970163953Srrs asoc->stream_reset_out_is_outstanding = 1; 2971163953Srrs asoc->str_reset = chk; 2972163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 2973163953Srrs stcb->asoc.stream_reset_outstanding++; 2974163953Srrs } else { 2975163953Srrs /* Can't do it, since we have sent one out */ 2976163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2977163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_TRY_LATER; 2978163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2979163953Srrs } 2980163953Srrs asoc->str_reset_seq_in++; 2981163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 2982163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2983163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 2984163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 2985163953Srrs } else { 2986163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2987163953Srrs } 2988163953Srrs} 2989163953Srrs 2990163953Srrsstatic int 2991163953Srrssctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb, 2992163953Srrs struct sctp_tmit_chunk *chk, 2993163953Srrs struct sctp_stream_reset_tsn_request *req) 2994163953Srrs{ 2995163953Srrs /* reset all in and out and update the tsn */ 2996163953Srrs /* 2997163953Srrs * A) reset my str-seq's on in and out. B) Select a receive next, 2998163953Srrs * and set cum-ack to it. Also process this selected number as a 2999163953Srrs * fwd-tsn as well. C) set in the response my next sending seq. 3000163953Srrs */ 3001163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 3002163953Srrs struct sctp_association *asoc = &stcb->asoc; 3003163953Srrs int abort_flag = 0; 3004163953Srrs uint32_t seq; 3005163953Srrs 3006163953Srrs seq = ntohl(req->request_seq); 3007163953Srrs if (asoc->str_reset_seq_in == seq) { 3008163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 3009163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 3010163953Srrs fwdtsn.ch.chunk_flags = 0; 3011163953Srrs fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1); 3012170992Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0); 3013163953Srrs if (abort_flag) { 3014163953Srrs return (1); 3015163953Srrs } 3016163953Srrs stcb->asoc.highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA; 3017163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 3018163953Srrs stcb->asoc.mapping_array_base_tsn = stcb->asoc.highest_tsn_inside_map + 1; 3019163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 3020163953Srrs atomic_add_int(&stcb->asoc.sending_seq, 1); 3021163953Srrs /* save off historical data for retrans */ 3022163953Srrs stcb->asoc.last_sending_seq[1] = stcb->asoc.last_sending_seq[0]; 3023163953Srrs stcb->asoc.last_sending_seq[0] = stcb->asoc.sending_seq; 3024163953Srrs stcb->asoc.last_base_tsnsent[1] = stcb->asoc.last_base_tsnsent[0]; 3025163953Srrs stcb->asoc.last_base_tsnsent[0] = stcb->asoc.mapping_array_base_tsn; 3026163953Srrs 3027163953Srrs sctp_add_stream_reset_result_tsn(chk, 3028163953Srrs ntohl(req->request_seq), 3029163953Srrs SCTP_STREAM_RESET_PERFORMED, 3030163953Srrs stcb->asoc.sending_seq, 3031163953Srrs stcb->asoc.mapping_array_base_tsn); 3032163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 3033163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 3034163953Srrs stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0]; 3035163953Srrs stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3036163953Srrs 3037163953Srrs asoc->str_reset_seq_in++; 3038163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 3039163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0], 3040163953Srrs stcb->asoc.last_sending_seq[0], 3041163953Srrs stcb->asoc.last_base_tsnsent[0] 3042163953Srrs ); 3043163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 3044163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1], 3045163953Srrs stcb->asoc.last_sending_seq[1], 3046163953Srrs stcb->asoc.last_base_tsnsent[1] 3047163953Srrs ); 3048163953Srrs } else { 3049163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 3050163953Srrs } 3051163953Srrs return (0); 3052163953Srrs} 3053163953Srrs 3054163953Srrsstatic void 3055163953Srrssctp_handle_str_reset_request_out(struct sctp_tcb *stcb, 3056163953Srrs struct sctp_tmit_chunk *chk, 3057170992Srrs struct sctp_stream_reset_out_request *req, int trunc) 3058163953Srrs{ 3059163953Srrs uint32_t seq, tsn; 3060163953Srrs int number_entries, len; 3061163953Srrs struct sctp_association *asoc = &stcb->asoc; 3062163953Srrs 3063163953Srrs seq = ntohl(req->request_seq); 3064163953Srrs 3065163953Srrs /* now if its not a duplicate we process it */ 3066163953Srrs if (asoc->str_reset_seq_in == seq) { 3067163953Srrs len = ntohs(req->ph.param_length); 3068163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t)); 3069163953Srrs /* 3070163953Srrs * the sender is resetting, handle the list issue.. we must 3071163953Srrs * a) verify if we can do the reset, if so no problem b) If 3072163953Srrs * we can't do the reset we must copy the request. c) queue 3073163953Srrs * it, and setup the data in processor to trigger it off 3074163953Srrs * when needed and dequeue all the queued data. 3075163953Srrs */ 3076163953Srrs tsn = ntohl(req->send_reset_at_tsn); 3077163953Srrs 3078163953Srrs /* move the reset action back one */ 3079163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 3080170992Srrs if (trunc) { 3081170992Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_DENIED); 3082170992Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_DENIED; 3083170992Srrs } else if ((tsn == asoc->cumulative_tsn) || 3084163953Srrs (compare_with_wrap(asoc->cumulative_tsn, tsn, MAX_TSN))) { 3085163953Srrs /* we can do it now */ 3086163953Srrs sctp_reset_in_stream(stcb, number_entries, req->list_of_streams); 3087163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 3088163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3089163953Srrs } else { 3090163953Srrs /* 3091163953Srrs * we must queue it up and thus wait for the TSN's 3092163953Srrs * to arrive that are at or before tsn 3093163953Srrs */ 3094163953Srrs struct sctp_stream_reset_list *liste; 3095163953Srrs int siz; 3096163953Srrs 3097163953Srrs siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t)); 3098163953Srrs SCTP_MALLOC(liste, struct sctp_stream_reset_list *, 3099170091Srrs siz, SCTP_M_STRESET); 3100163953Srrs if (liste == NULL) { 3101163953Srrs /* gak out of memory */ 3102163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_DENIED); 3103163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_DENIED; 3104163953Srrs return; 3105163953Srrs } 3106163953Srrs liste->tsn = tsn; 3107163953Srrs liste->number_entries = number_entries; 3108163953Srrs memcpy(&liste->req, req, 3109163953Srrs (sizeof(struct sctp_stream_reset_out_request) + (number_entries * sizeof(uint16_t)))); 3110163953Srrs TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp); 3111163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 3112163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3113163953Srrs } 3114163953Srrs asoc->str_reset_seq_in++; 3115163953Srrs } else if ((asoc->str_reset_seq_in - 1) == seq) { 3116163953Srrs /* 3117163953Srrs * one seq back, just echo back last action since my 3118163953Srrs * response was lost. 3119163953Srrs */ 3120163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 3121163953Srrs } else if ((asoc->str_reset_seq_in - 2) == seq) { 3122163953Srrs /* 3123163953Srrs * two seq back, just echo back last action since my 3124163953Srrs * response was lost. 3125163953Srrs */ 3126163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 3127163953Srrs } else { 3128163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 3129163953Srrs } 3130163953Srrs} 3131163953Srrs 3132170992Srrs#ifdef __GNUC__ 3133170992Srrs__attribute__((noinline)) 3134170992Srrs#endif 3135170992Srrs static int 3136170992Srrs sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3137170992Srrs struct sctp_stream_reset_out_req *sr_req) 3138163953Srrs{ 3139163953Srrs int chk_length, param_len, ptype; 3140170992Srrs struct sctp_paramhdr pstore; 3141170992Srrs uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE]; 3142170992Srrs 3143163953Srrs uint32_t seq; 3144163953Srrs int num_req = 0; 3145170992Srrs int trunc = 0; 3146163953Srrs struct sctp_tmit_chunk *chk; 3147163953Srrs struct sctp_chunkhdr *ch; 3148163953Srrs struct sctp_paramhdr *ph; 3149166675Srrs int ret_code = 0; 3150166675Srrs int num_param = 0; 3151163953Srrs 3152163953Srrs /* now it may be a reset or a reset-response */ 3153163953Srrs chk_length = ntohs(sr_req->ch.chunk_length); 3154163953Srrs 3155163953Srrs /* setup for adding the response */ 3156163953Srrs sctp_alloc_a_chunk(stcb, chk); 3157163953Srrs if (chk == NULL) { 3158163953Srrs return (ret_code); 3159163953Srrs } 3160163953Srrs chk->rec.chunk_id.id = SCTP_STREAM_RESET; 3161169208Srrs chk->rec.chunk_id.can_take_data = 0; 3162163953Srrs chk->asoc = &stcb->asoc; 3163163953Srrs chk->no_fr_allowed = 0; 3164163953Srrs chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr); 3165166023Srrs chk->book_size_scale = 0; 3166165647Srrs chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 3167163953Srrs if (chk->data == NULL) { 3168163953Srrsstrres_nochunk: 3169163953Srrs if (chk->data) { 3170163953Srrs sctp_m_freem(chk->data); 3171163953Srrs chk->data = NULL; 3172163953Srrs } 3173163953Srrs sctp_free_a_chunk(stcb, chk); 3174163953Srrs return (ret_code); 3175163953Srrs } 3176165647Srrs SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 3177163953Srrs 3178163953Srrs /* setup chunk parameters */ 3179163953Srrs chk->sent = SCTP_DATAGRAM_UNSENT; 3180163953Srrs chk->snd_count = 0; 3181163953Srrs chk->whoTo = stcb->asoc.primary_destination; 3182163953Srrs atomic_add_int(&chk->whoTo->ref_count, 1); 3183163953Srrs 3184163953Srrs ch = mtod(chk->data, struct sctp_chunkhdr *); 3185163953Srrs ch->chunk_type = SCTP_STREAM_RESET; 3186163953Srrs ch->chunk_flags = 0; 3187163953Srrs ch->chunk_length = htons(chk->send_size); 3188165647Srrs SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 3189170992Srrs offset += sizeof(struct sctp_chunkhdr); 3190163953Srrs while ((size_t)chk_length >= sizeof(struct sctp_stream_reset_tsn_request)) { 3191170992Srrs ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *) & pstore); 3192170992Srrs if (ph == NULL) 3193170992Srrs break; 3194163953Srrs param_len = ntohs(ph->param_length); 3195163953Srrs if (param_len < (int)sizeof(struct sctp_stream_reset_tsn_request)) { 3196163953Srrs /* bad param */ 3197163953Srrs break; 3198163953Srrs } 3199170994Srrs ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, (int)sizeof(cstore)), 3200170992Srrs (uint8_t *) & cstore); 3201163953Srrs ptype = ntohs(ph->param_type); 3202163953Srrs num_param++; 3203170994Srrs if (param_len > (int)sizeof(cstore)) { 3204170992Srrs trunc = 1; 3205170992Srrs } else { 3206170992Srrs trunc = 0; 3207170992Srrs } 3208170992Srrs 3209163953Srrs if (num_param > SCTP_MAX_RESET_PARAMS) { 3210163953Srrs /* hit the max of parameters already sorry.. */ 3211163953Srrs break; 3212163953Srrs } 3213163953Srrs if (ptype == SCTP_STR_RESET_OUT_REQUEST) { 3214163953Srrs struct sctp_stream_reset_out_request *req_out; 3215163953Srrs 3216163953Srrs req_out = (struct sctp_stream_reset_out_request *)ph; 3217163953Srrs num_req++; 3218163953Srrs if (stcb->asoc.stream_reset_outstanding) { 3219163953Srrs seq = ntohl(req_out->response_seq); 3220163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 3221163953Srrs /* implicit ack */ 3222169420Srrs (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_PERFORMED, NULL); 3223163953Srrs } 3224163953Srrs } 3225170992Srrs sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc); 3226163953Srrs } else if (ptype == SCTP_STR_RESET_IN_REQUEST) { 3227163953Srrs struct sctp_stream_reset_in_request *req_in; 3228163953Srrs 3229163953Srrs num_req++; 3230170992Srrs 3231163953Srrs req_in = (struct sctp_stream_reset_in_request *)ph; 3232170992Srrs 3233170992Srrs sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc); 3234163953Srrs } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) { 3235163953Srrs struct sctp_stream_reset_tsn_request *req_tsn; 3236163953Srrs 3237163953Srrs num_req++; 3238163953Srrs req_tsn = (struct sctp_stream_reset_tsn_request *)ph; 3239170992Srrs 3240163953Srrs if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) { 3241163953Srrs ret_code = 1; 3242163953Srrs goto strres_nochunk; 3243163953Srrs } 3244163953Srrs /* no more */ 3245163953Srrs break; 3246163953Srrs } else if (ptype == SCTP_STR_RESET_RESPONSE) { 3247163953Srrs struct sctp_stream_reset_response *resp; 3248163953Srrs uint32_t result; 3249163953Srrs 3250163953Srrs resp = (struct sctp_stream_reset_response *)ph; 3251163953Srrs seq = ntohl(resp->response_seq); 3252163953Srrs result = ntohl(resp->result); 3253163953Srrs if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) { 3254163953Srrs ret_code = 1; 3255163953Srrs goto strres_nochunk; 3256163953Srrs } 3257163953Srrs } else { 3258163953Srrs break; 3259163953Srrs } 3260170992Srrs offset += SCTP_SIZE32(param_len); 3261163953Srrs chk_length -= SCTP_SIZE32(param_len); 3262163953Srrs } 3263163953Srrs if (num_req == 0) { 3264163953Srrs /* we have no response free the stuff */ 3265163953Srrs goto strres_nochunk; 3266163953Srrs } 3267163953Srrs /* ok we have a chunk to link in */ 3268163953Srrs TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, 3269163953Srrs chk, 3270163953Srrs sctp_next); 3271163953Srrs stcb->asoc.ctrl_queue_cnt++; 3272163953Srrs return (ret_code); 3273163953Srrs} 3274163953Srrs 3275163953Srrs/* 3276163953Srrs * Handle a router or endpoints report of a packet loss, there are two ways 3277163953Srrs * to handle this, either we get the whole packet and must disect it 3278163953Srrs * ourselves (possibly with truncation and or corruption) or it is a summary 3279163953Srrs * from a middle box that did the disectting for us. 3280163953Srrs */ 3281163953Srrsstatic void 3282163953Srrssctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp, 3283170781Srrs struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit) 3284163953Srrs{ 3285163953Srrs uint32_t bottle_bw, on_queue; 3286163953Srrs uint16_t trunc_len; 3287163953Srrs unsigned int chlen; 3288163953Srrs unsigned int at; 3289163953Srrs struct sctp_chunk_desc desc; 3290163953Srrs struct sctp_chunkhdr *ch; 3291163953Srrs 3292163953Srrs chlen = ntohs(cp->ch.chunk_length); 3293163953Srrs chlen -= sizeof(struct sctp_pktdrop_chunk); 3294163953Srrs /* XXX possible chlen underflow */ 3295163953Srrs if (chlen == 0) { 3296163953Srrs ch = NULL; 3297163953Srrs if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) 3298163953Srrs SCTP_STAT_INCR(sctps_pdrpbwrpt); 3299163953Srrs } else { 3300163953Srrs ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr)); 3301163953Srrs chlen -= sizeof(struct sctphdr); 3302163953Srrs /* XXX possible chlen underflow */ 3303163953Srrs memset(&desc, 0, sizeof(desc)); 3304163953Srrs } 3305163953Srrs trunc_len = (uint16_t) ntohs(cp->trunc_len); 3306170781Srrs if (trunc_len > limit) { 3307170781Srrs trunc_len = limit; 3308170781Srrs } 3309163953Srrs /* now the chunks themselves */ 3310163953Srrs while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) { 3311163953Srrs desc.chunk_type = ch->chunk_type; 3312163953Srrs /* get amount we need to move */ 3313163953Srrs at = ntohs(ch->chunk_length); 3314163953Srrs if (at < sizeof(struct sctp_chunkhdr)) { 3315163953Srrs /* corrupt chunk, maybe at the end? */ 3316163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3317163953Srrs break; 3318163953Srrs } 3319163953Srrs if (trunc_len == 0) { 3320163953Srrs /* we are supposed to have all of it */ 3321163953Srrs if (at > chlen) { 3322163953Srrs /* corrupt skip it */ 3323163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3324163953Srrs break; 3325163953Srrs } 3326163953Srrs } else { 3327163953Srrs /* is there enough of it left ? */ 3328163953Srrs if (desc.chunk_type == SCTP_DATA) { 3329163953Srrs if (chlen < (sizeof(struct sctp_data_chunk) + 3330163953Srrs sizeof(desc.data_bytes))) { 3331163953Srrs break; 3332163953Srrs } 3333163953Srrs } else { 3334163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3335163953Srrs break; 3336163953Srrs } 3337163953Srrs } 3338163953Srrs } 3339163953Srrs if (desc.chunk_type == SCTP_DATA) { 3340163953Srrs /* can we get out the tsn? */ 3341163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3342163953Srrs SCTP_STAT_INCR(sctps_pdrpmbda); 3343163953Srrs 3344163953Srrs if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) { 3345163953Srrs /* yep */ 3346163953Srrs struct sctp_data_chunk *dcp; 3347163953Srrs uint8_t *ddp; 3348163953Srrs unsigned int iii; 3349163953Srrs 3350163953Srrs dcp = (struct sctp_data_chunk *)ch; 3351163953Srrs ddp = (uint8_t *) (dcp + 1); 3352163953Srrs for (iii = 0; iii < sizeof(desc.data_bytes); iii++) { 3353163953Srrs desc.data_bytes[iii] = ddp[iii]; 3354163953Srrs } 3355163953Srrs desc.tsn_ifany = dcp->dp.tsn; 3356163953Srrs } else { 3357163953Srrs /* nope we are done. */ 3358163953Srrs SCTP_STAT_INCR(sctps_pdrpnedat); 3359163953Srrs break; 3360163953Srrs } 3361163953Srrs } else { 3362163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3363163953Srrs SCTP_STAT_INCR(sctps_pdrpmbct); 3364163953Srrs } 3365163953Srrs 3366163953Srrs if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) { 3367163953Srrs SCTP_STAT_INCR(sctps_pdrppdbrk); 3368163953Srrs break; 3369163953Srrs } 3370163953Srrs if (SCTP_SIZE32(at) > chlen) { 3371163953Srrs break; 3372163953Srrs } 3373163953Srrs chlen -= SCTP_SIZE32(at); 3374163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3375163953Srrs /* done, none left */ 3376163953Srrs break; 3377163953Srrs } 3378163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at)); 3379163953Srrs } 3380163953Srrs /* Now update any rwnd --- possibly */ 3381163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) { 3382163953Srrs /* From a peer, we get a rwnd report */ 3383163953Srrs uint32_t a_rwnd; 3384163953Srrs 3385163953Srrs SCTP_STAT_INCR(sctps_pdrpfehos); 3386163953Srrs 3387163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3388163953Srrs on_queue = ntohl(cp->current_onq); 3389163953Srrs if (bottle_bw && on_queue) { 3390163953Srrs /* a rwnd report is in here */ 3391163953Srrs if (bottle_bw > on_queue) 3392163953Srrs a_rwnd = bottle_bw - on_queue; 3393163953Srrs else 3394163953Srrs a_rwnd = 0; 3395163953Srrs 3396163953Srrs if (a_rwnd == 0) 3397163953Srrs stcb->asoc.peers_rwnd = 0; 3398163953Srrs else { 3399163953Srrs if (a_rwnd > stcb->asoc.total_flight) { 3400163953Srrs stcb->asoc.peers_rwnd = 3401163953Srrs a_rwnd - stcb->asoc.total_flight; 3402163953Srrs } else { 3403163953Srrs stcb->asoc.peers_rwnd = 0; 3404163953Srrs } 3405163953Srrs if (stcb->asoc.peers_rwnd < 3406163953Srrs stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 3407163953Srrs /* SWS sender side engages */ 3408163953Srrs stcb->asoc.peers_rwnd = 0; 3409163953Srrs } 3410163953Srrs } 3411163953Srrs } 3412163953Srrs } else { 3413163953Srrs SCTP_STAT_INCR(sctps_pdrpfmbox); 3414163953Srrs } 3415163953Srrs 3416163953Srrs /* now middle boxes in sat networks get a cwnd bump */ 3417163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) && 3418163953Srrs (stcb->asoc.sat_t3_loss_recovery == 0) && 3419163953Srrs (stcb->asoc.sat_network)) { 3420163953Srrs /* 3421163953Srrs * This is debateable but for sat networks it makes sense 3422163953Srrs * Note if a T3 timer has went off, we will prohibit any 3423163953Srrs * changes to cwnd until we exit the t3 loss recovery. 3424163953Srrs */ 3425171440Srrs stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb, 3426171440Srrs net, cp, &bottle_bw, &on_queue); 3427163953Srrs } 3428163953Srrs} 3429163953Srrs 3430163953Srrs/* 3431163953Srrs * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to 3432163953Srrs * still contain IP/SCTP header - stcb: is the tcb found for this packet - 3433163953Srrs * offset: offset into the mbuf chain to first chunkhdr - length: is the 3434163953Srrs * length of the complete packet outputs: - length: modified to remaining 3435163953Srrs * length after control processing - netp: modified to new sctp_nets after 3436163953Srrs * cookie-echo processing - return NULL to discard the packet (ie. no asoc, 3437163953Srrs * bad packet,...) otherwise return the tcb for this packet 3438163953Srrs */ 3439170099Srrs#ifdef __GNUC__ 3440170099Srrs__attribute__((noinline)) 3441170099Srrs#endif 3442170099Srrs static struct sctp_tcb * 3443170099Srrs sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length, 3444170099Srrs struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp, 3445170099Srrs struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen, 3446170181Srrs uint32_t vrf_id) 3447163953Srrs{ 3448163953Srrs struct sctp_association *asoc; 3449163953Srrs uint32_t vtag_in; 3450163953Srrs int num_chunks = 0; /* number of control chunks processed */ 3451170140Srrs uint32_t chk_length; 3452163953Srrs int ret; 3453168299Srrs int abort_no_unlock = 0; 3454163953Srrs 3455163953Srrs /* 3456163953Srrs * How big should this be, and should it be alloc'd? Lets try the 3457163953Srrs * d-mtu-ceiling for now (2k) and that should hopefully work ... 3458163953Srrs * until we get into jumbo grams and such.. 3459163953Srrs */ 3460166675Srrs uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE]; 3461163953Srrs struct sctp_tcb *locked_tcb = stcb; 3462163953Srrs int got_auth = 0; 3463163953Srrs uint32_t auth_offset = 0, auth_len = 0; 3464163953Srrs int auth_skipped = 0; 3465163953Srrs 3466169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n", 3467169420Srrs iphlen, *offset, length, stcb); 3468163953Srrs 3469163953Srrs /* validate chunk header length... */ 3470163953Srrs if (ntohs(ch->chunk_length) < sizeof(*ch)) { 3471170056Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n", 3472170056Srrs ntohs(ch->chunk_length)); 3473170091Srrs if (locked_tcb) { 3474170091Srrs SCTP_TCB_UNLOCK(locked_tcb); 3475170091Srrs } 3476163953Srrs return (NULL); 3477163953Srrs } 3478163953Srrs /* 3479163953Srrs * validate the verification tag 3480163953Srrs */ 3481163953Srrs vtag_in = ntohl(sh->v_tag); 3482163953Srrs 3483165220Srrs if (locked_tcb) { 3484165220Srrs SCTP_TCB_LOCK_ASSERT(locked_tcb); 3485165220Srrs } 3486163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 3487170056Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n", 3488170056Srrs ntohs(ch->chunk_length), vtag_in); 3489163953Srrs if (vtag_in != 0) { 3490163953Srrs /* protocol error- silently discard... */ 3491163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3492169378Srrs if (locked_tcb) { 3493163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3494169378Srrs } 3495163953Srrs return (NULL); 3496163953Srrs } 3497163953Srrs } else if (ch->chunk_type != SCTP_COOKIE_ECHO) { 3498163953Srrs /* 3499163953Srrs * If there is no stcb, skip the AUTH chunk and process 3500163953Srrs * later after a stcb is found (to validate the lookup was 3501163953Srrs * valid. 3502163953Srrs */ 3503163953Srrs if ((ch->chunk_type == SCTP_AUTHENTICATION) && 3504163953Srrs (stcb == NULL) && !sctp_auth_disable) { 3505163953Srrs /* save this chunk for later processing */ 3506163953Srrs auth_skipped = 1; 3507163953Srrs auth_offset = *offset; 3508163953Srrs auth_len = ntohs(ch->chunk_length); 3509163953Srrs 3510163953Srrs /* (temporarily) move past this chunk */ 3511163953Srrs *offset += SCTP_SIZE32(auth_len); 3512163953Srrs if (*offset >= length) { 3513163953Srrs /* no more data left in the mbuf chain */ 3514163953Srrs *offset = length; 3515170091Srrs if (locked_tcb) { 3516170091Srrs SCTP_TCB_UNLOCK(locked_tcb); 3517170091Srrs } 3518163953Srrs return (NULL); 3519163953Srrs } 3520163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3521163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 3522163953Srrs } 3523169420Srrs if (ch == NULL) { 3524169420Srrs /* Help */ 3525169420Srrs *offset = length; 3526170091Srrs if (locked_tcb) { 3527170091Srrs SCTP_TCB_UNLOCK(locked_tcb); 3528170091Srrs } 3529169420Srrs return (NULL); 3530169420Srrs } 3531163953Srrs if (ch->chunk_type == SCTP_COOKIE_ECHO) { 3532163953Srrs goto process_control_chunks; 3533163953Srrs } 3534163953Srrs /* 3535163953Srrs * first check if it's an ASCONF with an unknown src addr we 3536163953Srrs * need to look inside to find the association 3537163953Srrs */ 3538163953Srrs if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) { 3539163953Srrs /* inp's refcount may be reduced */ 3540163953Srrs SCTP_INP_INCR_REF(inp); 3541163953Srrs 3542163953Srrs stcb = sctp_findassociation_ep_asconf(m, iphlen, 3543163953Srrs *offset, sh, &inp, netp); 3544163953Srrs if (stcb == NULL) { 3545163953Srrs /* 3546163953Srrs * reduce inp's refcount if not reduced in 3547163953Srrs * sctp_findassociation_ep_asconf(). 3548163953Srrs */ 3549163953Srrs SCTP_INP_DECR_REF(inp); 3550163953Srrs } 3551163953Srrs /* now go back and verify any auth chunk to be sure */ 3552163953Srrs if (auth_skipped && (stcb != NULL)) { 3553163953Srrs struct sctp_auth_chunk *auth; 3554163953Srrs 3555163953Srrs auth = (struct sctp_auth_chunk *) 3556163953Srrs sctp_m_getptr(m, auth_offset, 3557163953Srrs auth_len, chunk_buf); 3558163953Srrs got_auth = 1; 3559163953Srrs auth_skipped = 0; 3560169420Srrs if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, 3561163953Srrs auth_offset)) { 3562163953Srrs /* auth HMAC failed so dump it */ 3563163953Srrs *offset = length; 3564170091Srrs if (locked_tcb) { 3565170091Srrs SCTP_TCB_UNLOCK(locked_tcb); 3566170091Srrs } 3567163953Srrs return (NULL); 3568163953Srrs } else { 3569163953Srrs /* remaining chunks are HMAC checked */ 3570163953Srrs stcb->asoc.authenticated = 1; 3571163953Srrs } 3572163953Srrs } 3573163953Srrs } 3574163953Srrs if (stcb == NULL) { 3575163953Srrs /* no association, so it's out of the blue... */ 3576169352Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, NULL, 3577170181Srrs vrf_id); 3578163953Srrs *offset = length; 3579169378Srrs if (locked_tcb) { 3580163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3581169378Srrs } 3582163953Srrs return (NULL); 3583163953Srrs } 3584163953Srrs asoc = &stcb->asoc; 3585163953Srrs /* ABORT and SHUTDOWN can use either v_tag... */ 3586163953Srrs if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) || 3587163953Srrs (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) || 3588163953Srrs (ch->chunk_type == SCTP_PACKET_DROPPED)) { 3589163953Srrs if ((vtag_in == asoc->my_vtag) || 3590163953Srrs ((ch->chunk_flags & SCTP_HAD_NO_TCB) && 3591163953Srrs (vtag_in == asoc->peer_vtag))) { 3592163953Srrs /* this is valid */ 3593163953Srrs } else { 3594163953Srrs /* drop this packet... */ 3595163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3596169378Srrs if (locked_tcb) { 3597163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3598169378Srrs } 3599163953Srrs return (NULL); 3600163953Srrs } 3601163953Srrs } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 3602163953Srrs if (vtag_in != asoc->my_vtag) { 3603163953Srrs /* 3604163953Srrs * this could be a stale SHUTDOWN-ACK or the 3605163953Srrs * peer never got the SHUTDOWN-COMPLETE and 3606163953Srrs * is still hung; we have started a new asoc 3607163953Srrs * but it won't complete until the shutdown 3608163953Srrs * is completed 3609163953Srrs */ 3610169378Srrs if (locked_tcb) { 3611163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3612169378Srrs } 3613163953Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, 3614170181Srrs NULL, vrf_id); 3615163953Srrs return (NULL); 3616163953Srrs } 3617163953Srrs } else { 3618163953Srrs /* for all other chunks, vtag must match */ 3619163953Srrs if (vtag_in != asoc->my_vtag) { 3620163953Srrs /* invalid vtag... */ 3621169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, 3622169420Srrs "invalid vtag: %xh, expect %xh\n", 3623169420Srrs vtag_in, asoc->my_vtag); 3624163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3625169378Srrs if (locked_tcb) { 3626163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3627169378Srrs } 3628163953Srrs *offset = length; 3629163953Srrs return (NULL); 3630163953Srrs } 3631163953Srrs } 3632163953Srrs } /* end if !SCTP_COOKIE_ECHO */ 3633163953Srrs /* 3634163953Srrs * process all control chunks... 3635163953Srrs */ 3636163953Srrs if (((ch->chunk_type == SCTP_SELECTIVE_ACK) || 3637163953Srrs (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) && 3638163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 3639163953Srrs /* implied cookie-ack.. we must have lost the ack */ 3640163953Srrs stcb->asoc.overall_error_count = 0; 3641163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, 3642163953Srrs *netp); 3643163953Srrs } 3644163953Srrsprocess_control_chunks: 3645163953Srrs while (IS_SCTP_CONTROL(ch)) { 3646163953Srrs /* validate chunk length */ 3647163953Srrs chk_length = ntohs(ch->chunk_length); 3648169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n", 3649169420Srrs ch->chunk_type, chk_length); 3650170744Srrs SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length); 3651170140Srrs if (chk_length < sizeof(*ch) || 3652170140Srrs (*offset + (int)chk_length) > length) { 3653163953Srrs *offset = length; 3654169378Srrs if (locked_tcb) { 3655163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3656169378Srrs } 3657163953Srrs return (NULL); 3658163953Srrs } 3659163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks); 3660163953Srrs /* 3661163953Srrs * INIT-ACK only gets the init ack "header" portion only 3662163953Srrs * because we don't have to process the peer's COOKIE. All 3663163953Srrs * others get a complete chunk. 3664163953Srrs */ 3665169208Srrs if ((ch->chunk_type == SCTP_INITIATION_ACK) || 3666169208Srrs (ch->chunk_type == SCTP_INITIATION)) { 3667163953Srrs /* get an init-ack chunk */ 3668163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3669163953Srrs sizeof(struct sctp_init_ack_chunk), chunk_buf); 3670163953Srrs if (ch == NULL) { 3671163953Srrs *offset = length; 3672169378Srrs if (locked_tcb) { 3673163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3674169378Srrs } 3675163953Srrs return (NULL); 3676163953Srrs } 3677170642Srrs } else { 3678170786Srrs /* For cookies and all other chunks. */ 3679169208Srrs if (chk_length > sizeof(chunk_buf)) { 3680169208Srrs /* 3681169208Srrs * use just the size of the chunk buffer so 3682170642Srrs * the front part of our chunks fit in 3683170642Srrs * contiguous space up to the chunk buffer 3684170642Srrs * size (508 bytes). For chunks that need to 3685170786Srrs * get more than that they must use the 3686170642Srrs * sctp_m_getptr() function or other means 3687170786Srrs * (e.g. know how to parse mbuf chains). 3688170786Srrs * Cookies do this already. 3689169208Srrs */ 3690169208Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3691169208Srrs (sizeof(chunk_buf) - 4), 3692169208Srrs chunk_buf); 3693169208Srrs if (ch == NULL) { 3694169208Srrs *offset = length; 3695169378Srrs if (locked_tcb) { 3696169208Srrs SCTP_TCB_UNLOCK(locked_tcb); 3697169378Srrs } 3698169208Srrs return (NULL); 3699169208Srrs } 3700169208Srrs } else { 3701169208Srrs /* We can fit it all */ 3702170642Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3703170642Srrs chk_length, chunk_buf); 3704170642Srrs if (ch == NULL) { 3705170642Srrs SCTP_PRINTF("sctp_process_control: Can't get the all data....\n"); 3706170642Srrs *offset = length; 3707170642Srrs if (locked_tcb) { 3708170642Srrs SCTP_TCB_UNLOCK(locked_tcb); 3709169208Srrs } 3710170642Srrs return (NULL); 3711163953Srrs } 3712163953Srrs } 3713163953Srrs } 3714163953Srrs num_chunks++; 3715163953Srrs /* Save off the last place we got a control from */ 3716163953Srrs if (stcb != NULL) { 3717169420Srrs if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) { 3718163953Srrs /* 3719163953Srrs * allow last_control to be NULL if 3720163953Srrs * ASCONF... ASCONF processing will find the 3721163953Srrs * right net later 3722163953Srrs */ 3723169420Srrs if ((netp != NULL) && (*netp != NULL)) 3724169420Srrs stcb->asoc.last_control_chunk_from = *netp; 3725163953Srrs } 3726163953Srrs } 3727163953Srrs#ifdef SCTP_AUDITING_ENABLED 3728163953Srrs sctp_audit_log(0xB0, ch->chunk_type); 3729163953Srrs#endif 3730163953Srrs 3731163953Srrs /* check to see if this chunk required auth, but isn't */ 3732163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 3733163953Srrs sctp_auth_is_required_chunk(ch->chunk_type, 3734163953Srrs stcb->asoc.local_auth_chunks) && 3735163953Srrs !stcb->asoc.authenticated) { 3736163953Srrs /* "silently" ignore */ 3737163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 3738163953Srrs goto next_chunk; 3739163953Srrs } 3740163953Srrs switch (ch->chunk_type) { 3741163953Srrs case SCTP_INITIATION: 3742163953Srrs /* must be first and only chunk */ 3743169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n"); 3744163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3745163953Srrs /* We are not interested anymore? */ 3746163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3747163953Srrs /* 3748163953Srrs * collision case where we are 3749163953Srrs * sending to them too 3750163953Srrs */ 3751163953Srrs ; 3752163953Srrs } else { 3753169378Srrs if (locked_tcb) { 3754163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3755169378Srrs } 3756163953Srrs *offset = length; 3757163953Srrs return (NULL); 3758163953Srrs } 3759163953Srrs } 3760163953Srrs if ((num_chunks > 1) || 3761170140Srrs (sctp_strict_init && (length - *offset > (int)SCTP_SIZE32(chk_length)))) { 3762163953Srrs *offset = length; 3763169378Srrs if (locked_tcb) { 3764163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3765169378Srrs } 3766163953Srrs return (NULL); 3767163953Srrs } 3768163953Srrs if ((stcb != NULL) && 3769163953Srrs (SCTP_GET_STATE(&stcb->asoc) == 3770163953Srrs SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3771163953Srrs sctp_send_shutdown_ack(stcb, 3772163953Srrs stcb->asoc.primary_destination); 3773163953Srrs *offset = length; 3774163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3775169378Srrs if (locked_tcb) { 3776163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3777169378Srrs } 3778163953Srrs return (NULL); 3779163953Srrs } 3780169420Srrs if (netp) { 3781169420Srrs sctp_handle_init(m, iphlen, *offset, sh, 3782169420Srrs (struct sctp_init_chunk *)ch, inp, 3783170181Srrs stcb, *netp, &abort_no_unlock, vrf_id); 3784169420Srrs } 3785168299Srrs if (abort_no_unlock) 3786168299Srrs return (NULL); 3787168299Srrs 3788163953Srrs *offset = length; 3789169378Srrs if (locked_tcb) { 3790163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3791169378Srrs } 3792163953Srrs return (NULL); 3793163953Srrs break; 3794170642Srrs case SCTP_PAD_CHUNK: 3795170642Srrs break; 3796163953Srrs case SCTP_INITIATION_ACK: 3797163953Srrs /* must be first and only chunk */ 3798169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT-ACK\n"); 3799163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3800163953Srrs /* We are not interested anymore */ 3801163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3802163953Srrs ; 3803163953Srrs } else { 3804169378Srrs if (locked_tcb) { 3805163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3806169378Srrs } 3807163953Srrs *offset = length; 3808163953Srrs if (stcb) { 3809171440Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27); 3810163953Srrs } 3811163953Srrs return (NULL); 3812163953Srrs } 3813163953Srrs } 3814163953Srrs if ((num_chunks > 1) || 3815170140Srrs (sctp_strict_init && (length - *offset > (int)SCTP_SIZE32(chk_length)))) { 3816163953Srrs *offset = length; 3817169378Srrs if (locked_tcb) { 3818163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3819169378Srrs } 3820163953Srrs return (NULL); 3821163953Srrs } 3822169420Srrs if ((netp) && (*netp)) { 3823169420Srrs ret = sctp_handle_init_ack(m, iphlen, *offset, sh, 3824170181Srrs (struct sctp_init_ack_chunk *)ch, stcb, *netp, &abort_no_unlock, vrf_id); 3825169420Srrs } else { 3826169420Srrs ret = -1; 3827169420Srrs } 3828163953Srrs /* 3829163953Srrs * Special case, I must call the output routine to 3830163953Srrs * get the cookie echoed 3831163953Srrs */ 3832168299Srrs if (abort_no_unlock) 3833168299Srrs return (NULL); 3834168299Srrs 3835163953Srrs if ((stcb) && ret == 0) 3836163953Srrs sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3837163953Srrs *offset = length; 3838169378Srrs if (locked_tcb) { 3839163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3840169378Srrs } 3841163953Srrs return (NULL); 3842163953Srrs break; 3843163953Srrs case SCTP_SELECTIVE_ACK: 3844169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK\n"); 3845163953Srrs SCTP_STAT_INCR(sctps_recvsacks); 3846163953Srrs { 3847163953Srrs struct sctp_sack_chunk *sack; 3848163953Srrs int abort_now = 0; 3849163953Srrs uint32_t a_rwnd, cum_ack; 3850163953Srrs uint16_t num_seg; 3851163953Srrs int nonce_sum_flag; 3852163953Srrs 3853169420Srrs if ((stcb == NULL) || (chk_length < sizeof(struct sctp_sack_chunk))) { 3854169420Srrs SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on sack chunk, too small\n"); 3855169208Srrs *offset = length; 3856169378Srrs if (locked_tcb) { 3857169352Srrs SCTP_TCB_UNLOCK(locked_tcb); 3858169378Srrs } 3859169208Srrs return (NULL); 3860169208Srrs } 3861163953Srrs sack = (struct sctp_sack_chunk *)ch; 3862163953Srrs nonce_sum_flag = ch->chunk_flags & SCTP_SACK_NONCE_SUM; 3863163953Srrs cum_ack = ntohl(sack->sack.cum_tsn_ack); 3864163953Srrs num_seg = ntohs(sack->sack.num_gap_ack_blks); 3865163953Srrs a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd); 3866170606Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n", 3867170606Srrs cum_ack, 3868170606Srrs num_seg, 3869170606Srrs a_rwnd 3870170606Srrs ); 3871163953Srrs stcb->asoc.seen_a_sack_this_pkt = 1; 3872163953Srrs if ((stcb->asoc.pr_sctp_cnt == 0) && 3873163953Srrs (num_seg == 0) && 3874163953Srrs ((compare_with_wrap(cum_ack, stcb->asoc.last_acked_seq, MAX_TSN)) || 3875163953Srrs (cum_ack == stcb->asoc.last_acked_seq)) && 3876163953Srrs (stcb->asoc.saw_sack_with_frags == 0) && 3877163953Srrs (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) 3878163953Srrs ) { 3879163953Srrs /* 3880163953Srrs * We have a SIMPLE sack having no 3881163953Srrs * prior segments and data on sent 3882163953Srrs * queue to be acked.. Use the 3883163953Srrs * faster path sack processing. We 3884163953Srrs * also allow window update sacks 3885163953Srrs * with no missing segments to go 3886163953Srrs * this way too. 3887163953Srrs */ 3888169208Srrs sctp_express_handle_sack(stcb, cum_ack, a_rwnd, nonce_sum_flag, 3889169208Srrs &abort_now); 3890163953Srrs } else { 3891169420Srrs if (netp && *netp) 3892170781Srrs sctp_handle_sack(m, *offset, 3893170781Srrs sack, stcb, *netp, &abort_now, chk_length, a_rwnd); 3894163953Srrs } 3895163953Srrs if (abort_now) { 3896163953Srrs /* ABORT signal from sack processing */ 3897163953Srrs *offset = length; 3898163953Srrs return (NULL); 3899163953Srrs } 3900163953Srrs } 3901163953Srrs break; 3902163953Srrs case SCTP_HEARTBEAT_REQUEST: 3903169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n"); 3904169420Srrs if ((stcb) && netp && *netp) { 3905169420Srrs SCTP_STAT_INCR(sctps_recvheartbeat); 3906169420Srrs sctp_send_heartbeat_ack(stcb, m, *offset, 3907169420Srrs chk_length, *netp); 3908169420Srrs 3909169420Srrs /* He's alive so give him credit */ 3910169420Srrs stcb->asoc.overall_error_count = 0; 3911163953Srrs } 3912163953Srrs break; 3913163953Srrs case SCTP_HEARTBEAT_ACK: 3914169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT-ACK\n"); 3915169420Srrs if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) { 3916169208Srrs /* Its not ours */ 3917169352Srrs *offset = length; 3918169378Srrs if (locked_tcb) { 3919169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 3920169378Srrs } 3921169208Srrs return (NULL); 3922169208Srrs } 3923163953Srrs /* He's alive so give him credit */ 3924163953Srrs stcb->asoc.overall_error_count = 0; 3925163953Srrs SCTP_STAT_INCR(sctps_recvheartbeatack); 3926169420Srrs if (netp && *netp) 3927169420Srrs sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch, 3928169420Srrs stcb, *netp); 3929163953Srrs break; 3930163953Srrs case SCTP_ABORT_ASSOCIATION: 3931170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n", 3932170091Srrs stcb); 3933169420Srrs if ((stcb) && netp && *netp) 3934169420Srrs sctp_handle_abort((struct sctp_abort_chunk *)ch, 3935169420Srrs stcb, *netp); 3936163953Srrs *offset = length; 3937163953Srrs return (NULL); 3938163953Srrs break; 3939163953Srrs case SCTP_SHUTDOWN: 3940170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n", 3941170091Srrs stcb); 3942169420Srrs if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) { 3943169208Srrs *offset = length; 3944169378Srrs if (locked_tcb) { 3945169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 3946169378Srrs } 3947169208Srrs return (NULL); 3948169208Srrs 3949169420Srrs } 3950169420Srrs if (netp && *netp) { 3951163953Srrs int abort_flag = 0; 3952163953Srrs 3953163953Srrs sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch, 3954163953Srrs stcb, *netp, &abort_flag); 3955163953Srrs if (abort_flag) { 3956163953Srrs *offset = length; 3957163953Srrs return (NULL); 3958163953Srrs } 3959163953Srrs } 3960163953Srrs break; 3961163953Srrs case SCTP_SHUTDOWN_ACK: 3962170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-ACK, stcb %p\n", stcb); 3963169420Srrs if ((stcb) && (netp) && (*netp)) 3964169420Srrs sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp); 3965163953Srrs *offset = length; 3966163953Srrs return (NULL); 3967163953Srrs break; 3968169420Srrs 3969163953Srrs case SCTP_OPERATION_ERROR: 3970169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP-ERR\n"); 3971169420Srrs if ((stcb) && netp && *netp && sctp_handle_error(ch, stcb, *netp) < 0) { 3972169420Srrs 3973163953Srrs *offset = length; 3974163953Srrs return (NULL); 3975163953Srrs } 3976163953Srrs break; 3977163953Srrs case SCTP_COOKIE_ECHO: 3978169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, 3979170091Srrs "SCTP_COOKIE-ECHO, stcb %p\n", stcb); 3980163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3981163953Srrs ; 3982163953Srrs } else { 3983169420Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3984163953Srrs /* We are not interested anymore */ 3985163953Srrs *offset = length; 3986163953Srrs return (NULL); 3987163953Srrs } 3988163953Srrs } 3989163953Srrs /* 3990163953Srrs * First are we accepting? We do this again here 3991169420Srrs * sincen it is possible that a previous endpoint 3992169420Srrs * WAS listening responded to a INIT-ACK and then 3993163953Srrs * closed. We opened and bound.. and are now no 3994163953Srrs * longer listening. 3995163953Srrs */ 3996163953Srrs if (inp->sctp_socket->so_qlimit == 0) { 3997163953Srrs if ((stcb) && (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3998163953Srrs /* 3999163953Srrs * special case, is this a retran'd 4000163953Srrs * COOKIE-ECHO or a restarting assoc 4001163953Srrs * that is a peeled off or 4002163953Srrs * one-to-one style socket. 4003163953Srrs */ 4004163953Srrs goto process_cookie_anyway; 4005163953Srrs } 4006169352Srrs sctp_abort_association(inp, stcb, m, iphlen, 4007170181Srrs sh, NULL, vrf_id); 4008163953Srrs *offset = length; 4009163953Srrs return (NULL); 4010163953Srrs } else if (inp->sctp_socket->so_qlimit) { 4011163953Srrs /* we are accepting so check limits like TCP */ 4012163953Srrs if (inp->sctp_socket->so_qlen > 4013163953Srrs inp->sctp_socket->so_qlimit) { 4014163953Srrs /* no space */ 4015163953Srrs struct mbuf *oper; 4016163953Srrs struct sctp_paramhdr *phdr; 4017163953Srrs 4018163953Srrs if (sctp_abort_if_one_2_one_hits_limit) { 4019163953Srrs oper = NULL; 4020163953Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 4021165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 4022163953Srrs if (oper) { 4023165647Srrs SCTP_BUF_LEN(oper) = 4024163953Srrs sizeof(struct sctp_paramhdr); 4025163953Srrs phdr = mtod(oper, 4026163953Srrs struct sctp_paramhdr *); 4027163953Srrs phdr->param_type = 4028163953Srrs htons(SCTP_CAUSE_OUT_OF_RESC); 4029163953Srrs phdr->param_length = 4030163953Srrs htons(sizeof(struct sctp_paramhdr)); 4031163953Srrs } 4032163953Srrs sctp_abort_association(inp, stcb, m, 4033170181Srrs iphlen, sh, oper, vrf_id); 4034163953Srrs } 4035163953Srrs *offset = length; 4036163953Srrs return (NULL); 4037163953Srrs } 4038163953Srrs } 4039163953Srrs process_cookie_anyway: 4040163953Srrs { 4041163953Srrs struct mbuf *ret_buf; 4042165220Srrs struct sctp_inpcb *linp; 4043163953Srrs 4044169420Srrs if (stcb) { 4045165220Srrs linp = NULL; 4046169420Srrs } else { 4047165220Srrs linp = inp; 4048169420Srrs } 4049165220Srrs 4050169420Srrs if (linp) { 4051165220Srrs SCTP_ASOC_CREATE_LOCK(linp); 4052169420Srrs } 4053169420Srrs if (netp) { 4054169420Srrs ret_buf = 4055169420Srrs sctp_handle_cookie_echo(m, iphlen, 4056169420Srrs *offset, sh, 4057169420Srrs (struct sctp_cookie_echo_chunk *)ch, 4058169420Srrs &inp, &stcb, netp, 4059169420Srrs auth_skipped, 4060169420Srrs auth_offset, 4061169420Srrs auth_len, 4062169420Srrs &locked_tcb, 4063170181Srrs vrf_id); 4064169420Srrs } else { 4065169420Srrs ret_buf = NULL; 4066169420Srrs } 4067169420Srrs if (linp) { 4068165220Srrs SCTP_ASOC_CREATE_UNLOCK(linp); 4069169420Srrs } 4070163953Srrs if (ret_buf == NULL) { 4071163953Srrs if (locked_tcb) { 4072163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4073163953Srrs } 4074169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, 4075169420Srrs "GAK, null buffer\n"); 4076163953Srrs auth_skipped = 0; 4077163953Srrs *offset = length; 4078163953Srrs return (NULL); 4079163953Srrs } 4080163953Srrs /* if AUTH skipped, see if it verified... */ 4081163953Srrs if (auth_skipped) { 4082163953Srrs got_auth = 1; 4083163953Srrs auth_skipped = 0; 4084163953Srrs } 4085163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 4086163953Srrs /* 4087163953Srrs * Restart the timer if we have 4088163953Srrs * pending data 4089163953Srrs */ 4090163953Srrs struct sctp_tmit_chunk *chk; 4091163953Srrs 4092163953Srrs chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 4093163953Srrs if (chk) { 4094163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, 4095163953Srrs stcb->sctp_ep, stcb, 4096163953Srrs chk->whoTo); 4097163953Srrs } 4098163953Srrs } 4099163953Srrs } 4100163953Srrs break; 4101163953Srrs case SCTP_COOKIE_ACK: 4102170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE-ACK, stcb %p\n", stcb); 4103169420Srrs if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) { 4104169378Srrs if (locked_tcb) { 4105169352Srrs SCTP_TCB_UNLOCK(locked_tcb); 4106169378Srrs } 4107169352Srrs return (NULL); 4108169352Srrs } 4109163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4110163953Srrs /* We are not interested anymore */ 4111163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 4112163953Srrs ; 4113169420Srrs } else if (stcb) { 4114165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27); 4115163953Srrs *offset = length; 4116163953Srrs return (NULL); 4117163953Srrs } 4118163953Srrs } 4119163953Srrs /* He's alive so give him credit */ 4120169420Srrs if ((stcb) && netp && *netp) { 4121169378Srrs stcb->asoc.overall_error_count = 0; 4122169378Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp); 4123169378Srrs } 4124163953Srrs break; 4125163953Srrs case SCTP_ECN_ECHO: 4126169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-ECHO\n"); 4127163953Srrs /* He's alive so give him credit */ 4128169420Srrs if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) { 4129169208Srrs /* Its not ours */ 4130169378Srrs if (locked_tcb) { 4131169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4132169378Srrs } 4133169208Srrs *offset = length; 4134169208Srrs return (NULL); 4135169208Srrs } 4136169378Srrs if (stcb) { 4137169378Srrs stcb->asoc.overall_error_count = 0; 4138169378Srrs sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, 4139169378Srrs stcb); 4140169378Srrs } 4141163953Srrs break; 4142163953Srrs case SCTP_ECN_CWR: 4143169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-CWR\n"); 4144163953Srrs /* He's alive so give him credit */ 4145169420Srrs if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) { 4146169208Srrs /* Its not ours */ 4147169378Srrs if (locked_tcb) { 4148169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4149169378Srrs } 4150169208Srrs *offset = length; 4151169208Srrs return (NULL); 4152169208Srrs } 4153169378Srrs if (stcb) { 4154169378Srrs stcb->asoc.overall_error_count = 0; 4155169378Srrs sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb); 4156169378Srrs } 4157163953Srrs break; 4158163953Srrs case SCTP_SHUTDOWN_COMPLETE: 4159170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-COMPLETE, stcb %p\n", stcb); 4160163953Srrs /* must be first and only chunk */ 4161163953Srrs if ((num_chunks > 1) || 4162170140Srrs (length - *offset > (int)SCTP_SIZE32(chk_length))) { 4163163953Srrs *offset = length; 4164169378Srrs if (locked_tcb) { 4165163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4166169378Srrs } 4167163953Srrs return (NULL); 4168163953Srrs } 4169169420Srrs if ((stcb) && netp && *netp) { 4170169378Srrs sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch, 4171169378Srrs stcb, *netp); 4172169378Srrs } 4173163953Srrs *offset = length; 4174163953Srrs return (NULL); 4175163953Srrs break; 4176163953Srrs case SCTP_ASCONF: 4177169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n"); 4178163953Srrs /* He's alive so give him credit */ 4179169378Srrs if (stcb) { 4180169378Srrs stcb->asoc.overall_error_count = 0; 4181169378Srrs sctp_handle_asconf(m, *offset, 4182169378Srrs (struct sctp_asconf_chunk *)ch, stcb); 4183169378Srrs } 4184163953Srrs break; 4185163953Srrs case SCTP_ASCONF_ACK: 4186169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF-ACK\n"); 4187169208Srrs if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) { 4188169208Srrs /* Its not ours */ 4189169378Srrs if (locked_tcb) { 4190169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4191169378Srrs } 4192169208Srrs *offset = length; 4193169208Srrs return (NULL); 4194169208Srrs } 4195169420Srrs if ((stcb) && netp && *netp) { 4196169378Srrs /* He's alive so give him credit */ 4197169378Srrs stcb->asoc.overall_error_count = 0; 4198169378Srrs sctp_handle_asconf_ack(m, *offset, 4199169378Srrs (struct sctp_asconf_ack_chunk *)ch, stcb, *netp); 4200169378Srrs } 4201163953Srrs break; 4202163953Srrs case SCTP_FORWARD_CUM_TSN: 4203169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD-TSN\n"); 4204169208Srrs if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) { 4205169208Srrs /* Its not ours */ 4206169378Srrs if (locked_tcb) { 4207169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4208169378Srrs } 4209169208Srrs *offset = length; 4210169208Srrs return (NULL); 4211169208Srrs } 4212163953Srrs /* He's alive so give him credit */ 4213169378Srrs if (stcb) { 4214163953Srrs int abort_flag = 0; 4215163953Srrs 4216163953Srrs stcb->asoc.overall_error_count = 0; 4217163953Srrs *fwd_tsn_seen = 1; 4218163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4219163953Srrs /* We are not interested anymore */ 4220171440Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_29); 4221163953Srrs *offset = length; 4222163953Srrs return (NULL); 4223163953Srrs } 4224163953Srrs sctp_handle_forward_tsn(stcb, 4225170992Srrs (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset); 4226163953Srrs if (abort_flag) { 4227163953Srrs *offset = length; 4228163953Srrs return (NULL); 4229163953Srrs } else { 4230163953Srrs stcb->asoc.overall_error_count = 0; 4231163953Srrs } 4232163953Srrs 4233163953Srrs } 4234163953Srrs break; 4235163953Srrs case SCTP_STREAM_RESET: 4236169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n"); 4237169420Srrs if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) { 4238169208Srrs /* Its not ours */ 4239169378Srrs if (locked_tcb) { 4240169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4241169378Srrs } 4242169208Srrs *offset = length; 4243169208Srrs return (NULL); 4244169208Srrs } 4245163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4246163953Srrs /* We are not interested anymore */ 4247171440Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_30); 4248163953Srrs *offset = length; 4249163953Srrs return (NULL); 4250163953Srrs } 4251169420Srrs if (stcb->asoc.peer_supports_strreset == 0) { 4252169420Srrs /* 4253169420Srrs * hmm, peer should have announced this, but 4254169420Srrs * we will turn it on since he is sending us 4255169420Srrs * a stream reset. 4256169420Srrs */ 4257169420Srrs stcb->asoc.peer_supports_strreset = 1; 4258163953Srrs } 4259170992Srrs if (sctp_handle_stream_reset(stcb, m, *offset, (struct sctp_stream_reset_out_req *)ch)) { 4260169420Srrs /* stop processing */ 4261169420Srrs *offset = length; 4262169420Srrs return (NULL); 4263169420Srrs } 4264163953Srrs break; 4265163953Srrs case SCTP_PACKET_DROPPED: 4266169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n"); 4267163953Srrs /* re-get it all please */ 4268169208Srrs if (chk_length < sizeof(struct sctp_pktdrop_chunk)) { 4269169208Srrs /* Its not ours */ 4270169378Srrs if (locked_tcb) { 4271169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4272169378Srrs } 4273169208Srrs *offset = length; 4274169208Srrs return (NULL); 4275169208Srrs } 4276169420Srrs if (ch && (stcb) && netp && (*netp)) { 4277169378Srrs sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch, 4278170781Srrs stcb, *netp, 4279170781Srrs min(chk_length, (sizeof(chunk_buf) - 4))); 4280170781Srrs 4281169378Srrs } 4282163953Srrs break; 4283163953Srrs 4284163953Srrs case SCTP_AUTHENTICATION: 4285169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n"); 4286163953Srrs if (sctp_auth_disable) 4287163953Srrs goto unknown_chunk; 4288163953Srrs 4289163953Srrs if (stcb == NULL) { 4290163953Srrs /* save the first AUTH for later processing */ 4291163953Srrs if (auth_skipped == 0) { 4292163953Srrs auth_offset = *offset; 4293163953Srrs auth_len = chk_length; 4294163953Srrs auth_skipped = 1; 4295163953Srrs } 4296163953Srrs /* skip this chunk (temporarily) */ 4297163953Srrs goto next_chunk; 4298163953Srrs } 4299169208Srrs if ((chk_length < (sizeof(struct sctp_auth_chunk))) || 4300169420Srrs (chk_length > (sizeof(struct sctp_auth_chunk) + 4301169420Srrs SCTP_AUTH_DIGEST_LEN_MAX))) { 4302169208Srrs /* Its not ours */ 4303169378Srrs if (locked_tcb) { 4304169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4305169378Srrs } 4306169208Srrs *offset = length; 4307169208Srrs return (NULL); 4308169208Srrs } 4309163953Srrs if (got_auth == 1) { 4310163953Srrs /* skip this chunk... it's already auth'd */ 4311163953Srrs goto next_chunk; 4312163953Srrs } 4313163953Srrs got_auth = 1; 4314169420Srrs if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, 4315163953Srrs m, *offset)) { 4316163953Srrs /* auth HMAC failed so dump the packet */ 4317163953Srrs *offset = length; 4318163953Srrs return (stcb); 4319163953Srrs } else { 4320163953Srrs /* remaining chunks are HMAC checked */ 4321163953Srrs stcb->asoc.authenticated = 1; 4322163953Srrs } 4323163953Srrs break; 4324163953Srrs 4325163953Srrs default: 4326163953Srrs unknown_chunk: 4327163953Srrs /* it's an unknown chunk! */ 4328163953Srrs if ((ch->chunk_type & 0x40) && (stcb != NULL)) { 4329163953Srrs struct mbuf *mm; 4330163953Srrs struct sctp_paramhdr *phd; 4331163953Srrs 4332163953Srrs mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 4333165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 4334163953Srrs if (mm) { 4335163953Srrs phd = mtod(mm, struct sctp_paramhdr *); 4336163953Srrs /* 4337163953Srrs * We cheat and use param type since 4338163953Srrs * we did not bother to define a 4339163953Srrs * error cause struct. They are the 4340163953Srrs * same basic format with different 4341163953Srrs * names. 4342163953Srrs */ 4343163953Srrs phd->param_type = htons(SCTP_CAUSE_UNRECOG_CHUNK); 4344163953Srrs phd->param_length = htons(chk_length + sizeof(*phd)); 4345165647Srrs SCTP_BUF_LEN(mm) = sizeof(*phd); 4346166023Srrs SCTP_BUF_NEXT(mm) = SCTP_M_COPYM(m, *offset, SCTP_SIZE32(chk_length), 4347163953Srrs M_DONTWAIT); 4348165647Srrs if (SCTP_BUF_NEXT(mm)) { 4349163953Srrs sctp_queue_op_err(stcb, mm); 4350163953Srrs } else { 4351163953Srrs sctp_m_freem(mm); 4352163953Srrs } 4353163953Srrs } 4354163953Srrs } 4355163953Srrs if ((ch->chunk_type & 0x80) == 0) { 4356163953Srrs /* discard this packet */ 4357163953Srrs *offset = length; 4358163953Srrs return (stcb); 4359163953Srrs } /* else skip this bad chunk and continue... */ 4360163953Srrs break; 4361163953Srrs } /* switch (ch->chunk_type) */ 4362163953Srrs 4363163953Srrs 4364163953Srrsnext_chunk: 4365163953Srrs /* get the next chunk */ 4366163953Srrs *offset += SCTP_SIZE32(chk_length); 4367163953Srrs if (*offset >= length) { 4368163953Srrs /* no more data left in the mbuf chain */ 4369163953Srrs break; 4370163953Srrs } 4371163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4372163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 4373163953Srrs if (ch == NULL) { 4374169378Srrs if (locked_tcb) { 4375163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4376169378Srrs } 4377163953Srrs *offset = length; 4378163953Srrs return (NULL); 4379163953Srrs } 4380163953Srrs } /* while */ 4381163953Srrs return (stcb); 4382163953Srrs} 4383163953Srrs 4384163953Srrs 4385163953Srrs/* 4386163953Srrs * Process the ECN bits we have something set so we must look to see if it is 4387163953Srrs * ECN(0) or ECN(1) or CE 4388163953Srrs */ 4389170806Srrsstatic void 4390163953Srrssctp_process_ecn_marked_a(struct sctp_tcb *stcb, struct sctp_nets *net, 4391163953Srrs uint8_t ecn_bits) 4392163953Srrs{ 4393163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4394163953Srrs ; 4395163953Srrs } else if ((ecn_bits & SCTP_ECT1_BIT) == SCTP_ECT1_BIT) { 4396163953Srrs /* 4397163953Srrs * we only add to the nonce sum for ECT1, ECT0 does not 4398163953Srrs * change the NS bit (that we have yet to find a way to send 4399163953Srrs * it yet). 4400163953Srrs */ 4401163953Srrs 4402163953Srrs /* ECN Nonce stuff */ 4403163953Srrs stcb->asoc.receiver_nonce_sum++; 4404163953Srrs stcb->asoc.receiver_nonce_sum &= SCTP_SACK_NONCE_SUM; 4405163953Srrs 4406163953Srrs /* 4407163953Srrs * Drag up the last_echo point if cumack is larger since we 4408163953Srrs * don't want the point falling way behind by more than 4409163953Srrs * 2^^31 and then having it be incorrect. 4410163953Srrs */ 4411163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4412163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4413163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4414163953Srrs } 4415163953Srrs } else if ((ecn_bits & SCTP_ECT0_BIT) == SCTP_ECT0_BIT) { 4416163953Srrs /* 4417163953Srrs * Drag up the last_echo point if cumack is larger since we 4418163953Srrs * don't want the point falling way behind by more than 4419163953Srrs * 2^^31 and then having it be incorrect. 4420163953Srrs */ 4421163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4422163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4423163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4424163953Srrs } 4425163953Srrs } 4426163953Srrs} 4427163953Srrs 4428170806Srrsstatic void 4429163953Srrssctp_process_ecn_marked_b(struct sctp_tcb *stcb, struct sctp_nets *net, 4430163953Srrs uint32_t high_tsn, uint8_t ecn_bits) 4431163953Srrs{ 4432163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4433163953Srrs /* 4434163953Srrs * we possibly must notify the sender that a congestion 4435163953Srrs * window reduction is in order. We do this by adding a ECNE 4436163953Srrs * chunk to the output chunk queue. The incoming CWR will 4437163953Srrs * remove this chunk. 4438163953Srrs */ 4439163953Srrs if (compare_with_wrap(high_tsn, stcb->asoc.last_echo_tsn, 4440163953Srrs MAX_TSN)) { 4441163953Srrs /* Yep, we need to add a ECNE */ 4442163953Srrs sctp_send_ecn_echo(stcb, net, high_tsn); 4443163953Srrs stcb->asoc.last_echo_tsn = high_tsn; 4444163953Srrs } 4445163953Srrs } 4446163953Srrs} 4447163953Srrs 4448171440Srrs#ifdef INVARIANTS 4449171440Srrsstatic void 4450171440Srrssctp_validate_no_locks(struct sctp_inpcb *inp) 4451171440Srrs{ 4452171440Srrs struct sctp_tcb *stcb; 4453171440Srrs 4454171440Srrs LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 4455171440Srrs if (mtx_owned(&stcb->tcb_mtx)) { 4456171440Srrs panic("Own lock on stcb at return from input"); 4457171440Srrs } 4458171440Srrs } 4459171440Srrs} 4460171440Srrs 4461171440Srrs#endif 4462171440Srrs 4463163953Srrs/* 4464163953Srrs * common input chunk processing (v4 and v6) 4465163953Srrs */ 4466169378Srrsvoid 4467163953Srrssctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, 4468163953Srrs int length, struct sctphdr *sh, struct sctp_chunkhdr *ch, 4469163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 4470170181Srrs uint8_t ecn_bits, uint32_t vrf_id) 4471163953Srrs{ 4472163953Srrs /* 4473163953Srrs * Control chunk processing 4474163953Srrs */ 4475163953Srrs uint32_t high_tsn; 4476163953Srrs int fwd_tsn_seen = 0, data_processed = 0; 4477163953Srrs struct mbuf *m = *mm; 4478163953Srrs int abort_flag = 0; 4479163953Srrs int un_sent; 4480163953Srrs 4481163953Srrs SCTP_STAT_INCR(sctps_recvdatagrams); 4482163953Srrs#ifdef SCTP_AUDITING_ENABLED 4483163953Srrs sctp_audit_log(0xE0, 1); 4484163953Srrs sctp_auditing(0, inp, stcb, net); 4485163953Srrs#endif 4486163953Srrs 4487169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d\n", 4488169420Srrs m, iphlen, offset); 4489163953Srrs 4490163953Srrs if (stcb) { 4491163953Srrs /* always clear this before beginning a packet */ 4492163953Srrs stcb->asoc.authenticated = 0; 4493163953Srrs stcb->asoc.seen_a_sack_this_pkt = 0; 4494163953Srrs } 4495163953Srrs if (IS_SCTP_CONTROL(ch)) { 4496163953Srrs /* process the control portion of the SCTP packet */ 4497169655Srrs /* sa_ignore NO_NULL_CHK */ 4498163953Srrs stcb = sctp_process_control(m, iphlen, &offset, length, sh, ch, 4499170181Srrs inp, stcb, &net, &fwd_tsn_seen, vrf_id); 4500163953Srrs if (stcb) { 4501163953Srrs /* 4502163953Srrs * This covers us if the cookie-echo was there and 4503163953Srrs * it changes our INP. 4504163953Srrs */ 4505163953Srrs inp = stcb->sctp_ep; 4506163953Srrs } 4507163953Srrs } else { 4508163953Srrs /* 4509163953Srrs * no control chunks, so pre-process DATA chunks (these 4510163953Srrs * checks are taken care of by control processing) 4511163953Srrs */ 4512163953Srrs 4513163953Srrs /* 4514163953Srrs * if DATA only packet, and auth is required, then punt... 4515163953Srrs * can't have authenticated without any AUTH (control) 4516163953Srrs * chunks 4517163953Srrs */ 4518163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 4519163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4520163953Srrs stcb->asoc.local_auth_chunks)) { 4521163953Srrs /* "silently" ignore */ 4522163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4523163953Srrs SCTP_TCB_UNLOCK(stcb); 4524171440Srrs goto out_now; 4525163953Srrs } 4526163953Srrs if (stcb == NULL) { 4527163953Srrs /* out of the blue DATA chunk */ 4528169352Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL, 4529170181Srrs vrf_id); 4530171440Srrs goto out_now; 4531163953Srrs } 4532163953Srrs if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) { 4533163953Srrs /* v_tag mismatch! */ 4534163953Srrs SCTP_STAT_INCR(sctps_badvtag); 4535163953Srrs SCTP_TCB_UNLOCK(stcb); 4536171440Srrs goto out_now; 4537163953Srrs } 4538163953Srrs } 4539163953Srrs 4540163953Srrs if (stcb == NULL) { 4541163953Srrs /* 4542163953Srrs * no valid TCB for this packet, or we found it's a bad 4543163953Srrs * packet while processing control, or we're done with this 4544163953Srrs * packet (done or skip rest of data), so we drop it... 4545163953Srrs */ 4546171440Srrs goto out_now; 4547163953Srrs } 4548163953Srrs /* 4549163953Srrs * DATA chunk processing 4550163953Srrs */ 4551163953Srrs /* plow through the data chunks while length > offset */ 4552163953Srrs 4553163953Srrs /* 4554163953Srrs * Rest should be DATA only. Check authentication state if AUTH for 4555163953Srrs * DATA is required. 4556163953Srrs */ 4557165220Srrs if ((length > offset) && (stcb != NULL) && !sctp_auth_disable && 4558163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4559163953Srrs stcb->asoc.local_auth_chunks) && 4560163953Srrs !stcb->asoc.authenticated) { 4561163953Srrs /* "silently" ignore */ 4562163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4563169420Srrs SCTPDBG(SCTP_DEBUG_AUTH1, 4564169420Srrs "Data chunk requires AUTH, skipped\n"); 4565165220Srrs goto trigger_send; 4566163953Srrs } 4567163953Srrs if (length > offset) { 4568163953Srrs int retval; 4569163953Srrs 4570163953Srrs /* 4571163953Srrs * First check to make sure our state is correct. We would 4572163953Srrs * not get here unless we really did have a tag, so we don't 4573163953Srrs * abort if this happens, just dump the chunk silently. 4574163953Srrs */ 4575163953Srrs switch (SCTP_GET_STATE(&stcb->asoc)) { 4576163953Srrs case SCTP_STATE_COOKIE_ECHOED: 4577163953Srrs /* 4578163953Srrs * we consider data with valid tags in this state 4579163953Srrs * shows us the cookie-ack was lost. Imply it was 4580163953Srrs * there. 4581163953Srrs */ 4582163953Srrs stcb->asoc.overall_error_count = 0; 4583163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net); 4584163953Srrs break; 4585163953Srrs case SCTP_STATE_COOKIE_WAIT: 4586163953Srrs /* 4587163953Srrs * We consider OOTB any data sent during asoc setup. 4588163953Srrs */ 4589169352Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL, 4590170181Srrs vrf_id); 4591163953Srrs SCTP_TCB_UNLOCK(stcb); 4592171440Srrs goto out_now; 4593163953Srrs break; 4594163953Srrs case SCTP_STATE_EMPTY: /* should not happen */ 4595163953Srrs case SCTP_STATE_INUSE: /* should not happen */ 4596163953Srrs case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */ 4597163953Srrs case SCTP_STATE_SHUTDOWN_ACK_SENT: 4598163953Srrs default: 4599163953Srrs SCTP_TCB_UNLOCK(stcb); 4600171440Srrs goto out_now; 4601163953Srrs break; 4602163953Srrs case SCTP_STATE_OPEN: 4603163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 4604163953Srrs break; 4605163953Srrs } 4606163953Srrs /* take care of ECN, part 1. */ 4607163953Srrs if (stcb->asoc.ecn_allowed && 4608163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4609163953Srrs sctp_process_ecn_marked_a(stcb, net, ecn_bits); 4610163953Srrs } 4611163953Srrs /* plow through the data chunks while length > offset */ 4612163953Srrs retval = sctp_process_data(mm, iphlen, &offset, length, sh, 4613163953Srrs inp, stcb, net, &high_tsn); 4614163953Srrs if (retval == 2) { 4615163953Srrs /* 4616163953Srrs * The association aborted, NO UNLOCK needed since 4617163953Srrs * the association is destroyed. 4618163953Srrs */ 4619171440Srrs goto out_now; 4620163953Srrs } 4621163953Srrs data_processed = 1; 4622163953Srrs if (retval == 0) { 4623163953Srrs /* take care of ecn part 2. */ 4624163953Srrs if (stcb->asoc.ecn_allowed && 4625163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4626163953Srrs sctp_process_ecn_marked_b(stcb, net, high_tsn, 4627163953Srrs ecn_bits); 4628163953Srrs } 4629163953Srrs } 4630163953Srrs /* 4631163953Srrs * Anything important needs to have been m_copy'ed in 4632163953Srrs * process_data 4633163953Srrs */ 4634163953Srrs } 4635163953Srrs if ((data_processed == 0) && (fwd_tsn_seen)) { 4636163953Srrs int was_a_gap = 0; 4637163953Srrs 4638163953Srrs if (compare_with_wrap(stcb->asoc.highest_tsn_inside_map, 4639163953Srrs stcb->asoc.cumulative_tsn, MAX_TSN)) { 4640163953Srrs /* there was a gap before this data was processed */ 4641163953Srrs was_a_gap = 1; 4642163953Srrs } 4643163953Srrs sctp_sack_check(stcb, 1, was_a_gap, &abort_flag); 4644163953Srrs if (abort_flag) { 4645163953Srrs /* Again, we aborted so NO UNLOCK needed */ 4646171440Srrs goto out_now; 4647163953Srrs } 4648163953Srrs } 4649163953Srrs /* trigger send of any chunks in queue... */ 4650165220Srrstrigger_send: 4651163953Srrs#ifdef SCTP_AUDITING_ENABLED 4652163953Srrs sctp_audit_log(0xE0, 2); 4653163953Srrs sctp_auditing(1, inp, stcb, net); 4654163953Srrs#endif 4655169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 4656169420Srrs "Check for chunk output prw:%d tqe:%d tf=%d\n", 4657169420Srrs stcb->asoc.peers_rwnd, 4658169420Srrs TAILQ_EMPTY(&stcb->asoc.control_send_queue), 4659169420Srrs stcb->asoc.total_flight); 4660163953Srrs un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 4661163953Srrs 4662163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue) || 4663163953Srrs ((un_sent) && 4664163953Srrs (stcb->asoc.peers_rwnd > 0 || 4665163953Srrs (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) { 4666169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n"); 4667163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 4668169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n"); 4669163953Srrs } 4670163953Srrs#ifdef SCTP_AUDITING_ENABLED 4671163953Srrs sctp_audit_log(0xE0, 3); 4672163953Srrs sctp_auditing(2, inp, stcb, net); 4673163953Srrs#endif 4674163953Srrs SCTP_TCB_UNLOCK(stcb); 4675171440Srrsout_now: 4676171440Srrs#ifdef INVARIANTS 4677171440Srrs sctp_validate_no_locks(inp); 4678171440Srrs#endif 4679169378Srrs return; 4680163953Srrs} 4681163953Srrs 4682163953Srrs 4683163953Srrs 4684163953Srrsvoid 4685165647Srrssctp_input(i_pak, off) 4686165647Srrs struct mbuf *i_pak; 4687163953Srrs int off; 4688163953Srrs 4689163953Srrs{ 4690163953Srrs#ifdef SCTP_MBUF_LOGGING 4691163953Srrs struct mbuf *mat; 4692163953Srrs 4693163953Srrs#endif 4694165647Srrs struct mbuf *m; 4695163953Srrs int iphlen; 4696170181Srrs uint32_t vrf_id = 0; 4697163953Srrs uint8_t ecn_bits; 4698163953Srrs struct ip *ip; 4699163953Srrs struct sctphdr *sh; 4700163953Srrs struct sctp_inpcb *inp = NULL; 4701163953Srrs 4702163953Srrs uint32_t check, calc_check; 4703163953Srrs struct sctp_nets *net; 4704163953Srrs struct sctp_tcb *stcb = NULL; 4705163953Srrs struct sctp_chunkhdr *ch; 4706163953Srrs int refcount_up = 0; 4707163953Srrs int length, mlen, offset; 4708163953Srrs 4709169352Srrs 4710169352Srrs if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) { 4711169352Srrs SCTP_RELEASE_PKT(i_pak); 4712169352Srrs return; 4713169352Srrs } 4714168299Srrs mlen = SCTP_HEADER_LEN(i_pak); 4715163953Srrs iphlen = off; 4716165647Srrs m = SCTP_HEADER_TO_CHAIN(i_pak); 4717170056Srrs 4718163953Srrs net = NULL; 4719163953Srrs SCTP_STAT_INCR(sctps_recvpackets); 4720163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 4721163953Srrs 4722170091Srrs 4723163953Srrs#ifdef SCTP_MBUF_LOGGING 4724163953Srrs /* Log in any input mbufs */ 4725170744Srrs if (sctp_logging_level & SCTP_MBUF_LOGGING_ENABLE) { 4726170744Srrs mat = m; 4727170744Srrs while (mat) { 4728170744Srrs if (SCTP_BUF_IS_EXTENDED(mat)) { 4729170744Srrs sctp_log_mb(mat, SCTP_MBUF_INPUT); 4730170744Srrs } 4731170744Srrs mat = SCTP_BUF_NEXT(mat); 4732163953Srrs } 4733163953Srrs } 4734163953Srrs#endif 4735170091Srrs#ifdef SCTP_PACKET_LOGGING 4736170921Srrs if (sctp_logging_level & SCTP_LAST_PACKET_TRACING) 4737170921Srrs sctp_packet_log(m, mlen); 4738170091Srrs#endif 4739170091Srrs /* 4740170091Srrs * Must take out the iphlen, since mlen expects this (only effect lb 4741170091Srrs * case) 4742170091Srrs */ 4743170091Srrs mlen -= iphlen; 4744168124Srrs 4745163953Srrs /* 4746163953Srrs * Get IP, SCTP, and first chunk header together in first mbuf. 4747163953Srrs */ 4748163953Srrs ip = mtod(m, struct ip *); 4749163953Srrs offset = iphlen + sizeof(*sh) + sizeof(*ch); 4750165647Srrs if (SCTP_BUF_LEN(m) < offset) { 4751163953Srrs if ((m = m_pullup(m, offset)) == 0) { 4752163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4753163953Srrs return; 4754163953Srrs } 4755163953Srrs ip = mtod(m, struct ip *); 4756163953Srrs } 4757163953Srrs sh = (struct sctphdr *)((caddr_t)ip + iphlen); 4758163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(*sh)); 4759170859Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 4760170859Srrs "sctp_input() length:%d iphlen:%d\n", mlen, iphlen); 4761163953Srrs 4762163953Srrs /* SCTP does not allow broadcasts or multicasts */ 4763163953Srrs if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { 4764163953Srrs goto bad; 4765163953Srrs } 4766168124Srrs if (SCTP_IS_IT_BROADCAST(ip->ip_dst, m)) { 4767163953Srrs /* 4768163953Srrs * We only look at broadcast if its a front state, All 4769163953Srrs * others we will not have a tcb for anyway. 4770163953Srrs */ 4771163953Srrs goto bad; 4772163953Srrs } 4773163953Srrs /* validate SCTP checksum */ 4774168124Srrs if ((sctp_no_csum_on_loopback == 0) || !SCTP_IS_IT_LOOPBACK(m)) { 4775163953Srrs /* 4776163953Srrs * we do NOT validate things from the loopback if the sysctl 4777163953Srrs * is set to 1. 4778163953Srrs */ 4779163953Srrs check = sh->checksum; /* save incoming checksum */ 4780163953Srrs if ((check == 0) && (sctp_no_csum_on_loopback)) { 4781163953Srrs /* 4782163953Srrs * special hook for where we got a local address 4783163953Srrs * somehow routed across a non IFT_LOOP type 4784163953Srrs * interface 4785163953Srrs */ 4786163953Srrs if (ip->ip_src.s_addr == ip->ip_dst.s_addr) 4787163953Srrs goto sctp_skip_csum_4; 4788163953Srrs } 4789163953Srrs sh->checksum = 0; /* prepare for calc */ 4790163953Srrs calc_check = sctp_calculate_sum(m, &mlen, iphlen); 4791163953Srrs if (calc_check != check) { 4792169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 4793169420Srrs calc_check, check, m, mlen, iphlen); 4794163953Srrs 4795163953Srrs stcb = sctp_findassociation_addr(m, iphlen, 4796163953Srrs offset - sizeof(*ch), 4797169420Srrs sh, ch, &inp, &net, 4798169420Srrs vrf_id); 4799163953Srrs if ((inp) && (stcb)) { 4800163953Srrs sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 4801163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR); 4802163953Srrs } else if ((inp != NULL) && (stcb == NULL)) { 4803163953Srrs refcount_up = 1; 4804163953Srrs } 4805163953Srrs SCTP_STAT_INCR(sctps_badsum); 4806163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 4807163953Srrs goto bad; 4808163953Srrs } 4809163953Srrs sh->checksum = calc_check; 4810168299Srrs } 4811163953Srrssctp_skip_csum_4: 4812168124Srrs /* destination port of 0 is illegal, based on RFC2960. */ 4813168124Srrs if (sh->dest_port == 0) { 4814168124Srrs SCTP_STAT_INCR(sctps_hdrops); 4815168124Srrs goto bad; 4816168124Srrs } 4817163953Srrs /* validate mbuf chain length with IP payload length */ 4818163953Srrs if (mlen < (ip->ip_len - iphlen)) { 4819163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4820163953Srrs goto bad; 4821163953Srrs } 4822163953Srrs /* 4823163953Srrs * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 4824163953Srrs * IP/SCTP/first chunk header... 4825163953Srrs */ 4826163953Srrs stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 4827168299Srrs sh, ch, &inp, &net, vrf_id); 4828163953Srrs /* inp's ref-count increased && stcb locked */ 4829163953Srrs if (inp == NULL) { 4830163953Srrs struct sctp_init_chunk *init_chk, chunk_buf; 4831163953Srrs 4832163953Srrs SCTP_STAT_INCR(sctps_noport); 4833163953Srrs#ifdef ICMP_BANDLIM 4834163953Srrs /* 4835163953Srrs * we use the bandwidth limiting to protect against sending 4836163953Srrs * too many ABORTS all at once. In this case these count the 4837163953Srrs * same as an ICMP message. 4838163953Srrs */ 4839163953Srrs if (badport_bandlim(0) < 0) 4840163953Srrs goto bad; 4841163953Srrs#endif /* ICMP_BANDLIM */ 4842169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 4843169420Srrs "Sending a ABORT from packet entry!\n"); 4844163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 4845163953Srrs /* 4846163953Srrs * we do a trick here to get the INIT tag, dig in 4847163953Srrs * and get the tag from the INIT and put it in the 4848163953Srrs * common header. 4849163953Srrs */ 4850163953Srrs init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 4851163953Srrs iphlen + sizeof(*sh), sizeof(*init_chk), 4852163953Srrs (uint8_t *) & chunk_buf); 4853163953Srrs if (init_chk != NULL) 4854163953Srrs sh->v_tag = init_chk->init.initiate_tag; 4855163953Srrs } 4856165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 4857170181Srrs sctp_send_shutdown_complete2(m, iphlen, sh, vrf_id); 4858165220Srrs goto bad; 4859165220Srrs } 4860165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 4861165220Srrs goto bad; 4862165220Srrs } 4863165220Srrs if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 4864170181Srrs sctp_send_abort(m, iphlen, sh, 0, NULL, vrf_id); 4865163953Srrs goto bad; 4866163953Srrs } else if (stcb == NULL) { 4867163953Srrs refcount_up = 1; 4868163953Srrs } 4869171167Sgnn#ifdef IPSEC 4870163953Srrs /* 4871163953Srrs * I very much doubt any of the IPSEC stuff will work but I have no 4872163953Srrs * idea, so I will leave it in place. 4873163953Srrs */ 4874163996Srrs if (inp && ipsec4_in_reject(m, &inp->ip_inp.inp)) { 4875171133Sgnn ipsec4stat.in_polvio++; 4876163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4877163953Srrs goto bad; 4878163953Srrs } 4879163953Srrs#endif /* IPSEC */ 4880163953Srrs 4881163953Srrs /* 4882163953Srrs * common chunk processing 4883163953Srrs */ 4884163953Srrs length = ip->ip_len + iphlen; 4885163953Srrs offset -= sizeof(struct sctp_chunkhdr); 4886163953Srrs 4887163953Srrs ecn_bits = ip->ip_tos; 4888163953Srrs 4889169655Srrs /* sa_ignore NO_NULL_CHK */ 4890163953Srrs sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 4891170181Srrs inp, stcb, net, ecn_bits, vrf_id); 4892163953Srrs /* inp's ref-count reduced && stcb unlocked */ 4893163953Srrs if (m) { 4894163953Srrs sctp_m_freem(m); 4895163953Srrs } 4896163953Srrs if ((inp) && (refcount_up)) { 4897163953Srrs /* reduce ref-count */ 4898163953Srrs SCTP_INP_WLOCK(inp); 4899163953Srrs SCTP_INP_DECR_REF(inp); 4900163953Srrs SCTP_INP_WUNLOCK(inp); 4901163953Srrs } 4902163953Srrs return; 4903163953Srrsbad: 4904169420Srrs if (stcb) { 4905163953Srrs SCTP_TCB_UNLOCK(stcb); 4906169420Srrs } 4907163953Srrs if ((inp) && (refcount_up)) { 4908163953Srrs /* reduce ref-count */ 4909163953Srrs SCTP_INP_WLOCK(inp); 4910163953Srrs SCTP_INP_DECR_REF(inp); 4911163953Srrs SCTP_INP_WUNLOCK(inp); 4912163953Srrs } 4913163953Srrs if (m) { 4914163953Srrs sctp_m_freem(m); 4915163953Srrs } 4916163953Srrs return; 4917163953Srrs} 4918