sctp_input.c revision 165647
1163953Srrs/*- 2163953Srrs * Copyright (c) 2001-2006, 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 165647 2006-12-29 20:21:42Z rrs $"); 35163953Srrs 36163953Srrs#include "opt_ipsec.h" 37163953Srrs#include "opt_compat.h" 38163953Srrs#include "opt_inet6.h" 39163953Srrs#include "opt_inet.h" 40163953Srrs#include "opt_sctp.h" 41163953Srrs 42163953Srrs#include <sys/param.h> 43163953Srrs#include <sys/systm.h> 44163953Srrs#include <sys/malloc.h> 45163953Srrs#include <sys/mbuf.h> 46163953Srrs#include <sys/socket.h> 47163953Srrs#include <sys/socketvar.h> 48163953Srrs#include <sys/sysctl.h> 49163953Srrs#include <sys/domain.h> 50163953Srrs#include <sys/protosw.h> 51163953Srrs#include <sys/kernel.h> 52163953Srrs#include <sys/errno.h> 53163953Srrs#include <sys/syslog.h> 54163953Srrs 55163953Srrs#include <sys/limits.h> 56163953Srrs#include <machine/cpu.h> 57163953Srrs 58163953Srrs#include <net/if.h> 59163953Srrs#include <net/route.h> 60163953Srrs#include <net/if_types.h> 61163953Srrs 62163953Srrs#include <netinet/in.h> 63163953Srrs#include <netinet/in_systm.h> 64163953Srrs#include <netinet/ip.h> 65163953Srrs#include <netinet/in_pcb.h> 66163953Srrs#include <netinet/in_var.h> 67163953Srrs#include <netinet/ip_var.h> 68163953Srrs 69163953Srrs#ifdef INET6 70163953Srrs#include <netinet/ip6.h> 71163953Srrs#include <netinet6/ip6_var.h> 72163953Srrs#endif /* INET6 */ 73163953Srrs 74163953Srrs#include <netinet/ip_icmp.h> 75163953Srrs#include <netinet/icmp_var.h> 76163953Srrs 77163953Srrs#include <netinet/sctp_os.h> 78163953Srrs#include <netinet/sctp_var.h> 79163953Srrs#include <netinet/sctp_pcb.h> 80163953Srrs#include <netinet/sctp_header.h> 81163953Srrs#include <netinet/sctputil.h> 82163953Srrs#include <netinet/sctp_output.h> 83163953Srrs#include <netinet/sctp_input.h> 84163953Srrs#include <netinet/sctp_auth.h> 85163953Srrs#include <netinet/sctp_indata.h> 86163953Srrs#include <netinet/sctp_asconf.h> 87163953Srrs 88163953Srrs#include <netinet/ip_options.h> 89163953Srrs 90163953Srrs 91163953Srrs#ifdef IPSEC 92163953Srrs#include <netinet6/ipsec.h> 93163953Srrs#include <netkey/key.h> 94163953Srrs#endif /* IPSEC */ 95163953Srrs 96163953Srrs 97163953Srrs#ifdef SCTP_DEBUG 98163953Srrsextern uint32_t sctp_debug_on; 99163953Srrs 100163953Srrs#endif 101163953Srrs 102163953Srrs 103165220Srrs 104165220Srrs 105165220Srrsstruct sctp_foo_stuff sctp_logoff[30000]; 106165220Srrsint sctp_logoff_stuff = 0; 107165220Srrs 108165220Srrs 109163953Srrsstatic void 110163953Srrssctp_stop_all_cookie_timers(struct sctp_tcb *stcb) 111163953Srrs{ 112163953Srrs struct sctp_nets *net; 113163953Srrs 114165220Srrs /* 115165220Srrs * This now not only stops all cookie timers it also stops any INIT 116165220Srrs * timers as well. This will make sure that the timers are stopped 117165220Srrs * in all collision cases. 118165220Srrs */ 119163953Srrs SCTP_TCB_LOCK_ASSERT(stcb); 120163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 121165220Srrs if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) { 122163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE, 123163953Srrs stcb->sctp_ep, 124163953Srrs stcb, 125165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1); 126165220Srrs } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) { 127165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, 128165220Srrs stcb->sctp_ep, 129165220Srrs stcb, 130165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2); 131163953Srrs } 132163953Srrs } 133163953Srrs} 134163953Srrs 135163953Srrs/* INIT handler */ 136163953Srrsstatic void 137163953Srrssctp_handle_init(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, 138163953Srrs struct sctp_init_chunk *cp, struct sctp_inpcb *inp, struct sctp_tcb *stcb, 139163953Srrs struct sctp_nets *net) 140163953Srrs{ 141163953Srrs struct sctp_init *init; 142163953Srrs struct mbuf *op_err; 143163953Srrs uint32_t init_limit; 144163953Srrs 145163953Srrs#ifdef SCTP_DEBUG 146163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 147163953Srrs printf("sctp_handle_init: handling INIT tcb:%p\n", stcb); 148163953Srrs } 149163953Srrs#endif 150163953Srrs op_err = NULL; 151163953Srrs init = &cp->init; 152163953Srrs /* First are we accepting? */ 153163953Srrs if ((inp->sctp_socket->so_qlimit == 0) && (stcb == NULL)) { 154163953Srrs#ifdef SCTP_DEBUG 155163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 156163953Srrs printf("sctp_handle_init: Abort, so_qlimit:%d\n", inp->sctp_socket->so_qlimit); 157163953Srrs } 158163953Srrs#endif 159163953Srrs /* 160163953Srrs * FIX ME ?? What about TCP model and we have a 161163953Srrs * match/restart case? 162163953Srrs */ 163163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 164163953Srrs return; 165163953Srrs } 166163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) { 167163953Srrs /* Invalid length */ 168163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 169163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 170163953Srrs return; 171163953Srrs } 172163953Srrs /* validate parameters */ 173163953Srrs if (init->initiate_tag == 0) { 174163953Srrs /* protocol error... send abort */ 175163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 176163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 177163953Srrs return; 178163953Srrs } 179163953Srrs if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) { 180163953Srrs /* invalid parameter... send abort */ 181163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 182163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 183163953Srrs return; 184163953Srrs } 185163953Srrs if (init->num_inbound_streams == 0) { 186163953Srrs /* protocol error... send abort */ 187163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 188163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 189163953Srrs return; 190163953Srrs } 191163953Srrs if (init->num_outbound_streams == 0) { 192163953Srrs /* protocol error... send abort */ 193163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 194163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 195163953Srrs return; 196163953Srrs } 197163953Srrs init_limit = offset + ntohs(cp->ch.chunk_length); 198163953Srrs if (sctp_validate_init_auth_params(m, offset + sizeof(*cp), 199163953Srrs init_limit)) { 200163953Srrs /* auth parameter(s) error... send abort */ 201163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, NULL); 202163953Srrs return; 203163953Srrs } 204163953Srrs /* send an INIT-ACK w/cookie */ 205163953Srrs#ifdef SCTP_DEBUG 206163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 207163953Srrs printf("sctp_handle_init: sending INIT-ACK\n"); 208163953Srrs } 209163953Srrs#endif 210163953Srrs sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, sh, cp); 211163953Srrs} 212163953Srrs 213163953Srrs/* 214163953Srrs * process peer "INIT/INIT-ACK" chunk returns value < 0 on error 215163953Srrs */ 216163953Srrsstatic int 217163953Srrssctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb, 218163953Srrs struct sctp_nets *net) 219163953Srrs{ 220163953Srrs struct sctp_init *init; 221163953Srrs struct sctp_association *asoc; 222163953Srrs struct sctp_nets *lnet; 223163953Srrs unsigned int i; 224163953Srrs 225163953Srrs init = &cp->init; 226163953Srrs asoc = &stcb->asoc; 227163953Srrs /* save off parameters */ 228163953Srrs asoc->peer_vtag = ntohl(init->initiate_tag); 229163953Srrs asoc->peers_rwnd = ntohl(init->a_rwnd); 230163953Srrs if (TAILQ_FIRST(&asoc->nets)) { 231163953Srrs /* update any ssthresh's that may have a default */ 232163953Srrs TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 233163953Srrs lnet->ssthresh = asoc->peers_rwnd; 234163953Srrs 235163953Srrs#if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING) 236163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION); 237163953Srrs#endif 238163953Srrs 239163953Srrs } 240163953Srrs } 241164181Srrs SCTP_TCB_SEND_LOCK(stcb); 242163953Srrs if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) { 243163953Srrs unsigned int newcnt; 244163953Srrs struct sctp_stream_out *outs; 245163953Srrs struct sctp_stream_queue_pending *sp; 246163953Srrs 247163953Srrs /* cut back on number of streams */ 248163953Srrs newcnt = ntohs(init->num_inbound_streams); 249163953Srrs /* This if is probably not needed but I am cautious */ 250163953Srrs if (asoc->strmout) { 251163953Srrs /* First make sure no data chunks are trapped */ 252163953Srrs for (i = newcnt; i < asoc->pre_open_streams; i++) { 253163953Srrs outs = &asoc->strmout[i]; 254163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 255163953Srrs while (sp) { 256163953Srrs TAILQ_REMOVE(&outs->outqueue, sp, 257163953Srrs next); 258163953Srrs asoc->stream_queue_cnt--; 259163953Srrs sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, 260163953Srrs stcb, SCTP_NOTIFY_DATAGRAM_UNSENT, 261163953Srrs sp); 262163953Srrs if (sp->data) { 263163953Srrs sctp_m_freem(sp->data); 264163953Srrs sp->data = NULL; 265163953Srrs } 266163953Srrs sctp_free_remote_addr(sp->net); 267163953Srrs sp->net = NULL; 268163953Srrs /* Free the chunk */ 269163964Srrs printf("sp:%p tcb:%p weird free case\n", 270163979Sru sp, stcb); 271163953Srrs 272163953Srrs sctp_free_a_strmoq(stcb, sp); 273163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 274163953Srrs } 275163953Srrs } 276163953Srrs } 277163953Srrs /* cut back the count and abandon the upper streams */ 278163953Srrs asoc->pre_open_streams = newcnt; 279163953Srrs } 280164181Srrs SCTP_TCB_SEND_UNLOCK(stcb); 281163953Srrs asoc->streamoutcnt = asoc->pre_open_streams; 282163953Srrs /* init tsn's */ 283163953Srrs asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1; 284163953Srrs#ifdef SCTP_MAP_LOGGING 285163953Srrs sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 286163953Srrs#endif 287163953Srrs /* This is the next one we expect */ 288163953Srrs asoc->str_reset_seq_in = asoc->asconf_seq_in + 1; 289163953Srrs 290163953Srrs asoc->mapping_array_base_tsn = ntohl(init->initial_tsn); 291163953Srrs asoc->cumulative_tsn = asoc->asconf_seq_in; 292163953Srrs asoc->last_echo_tsn = asoc->asconf_seq_in; 293163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 294163953Srrs /* open the requested streams */ 295163953Srrs if (asoc->strmin != NULL) { 296163953Srrs /* Free the old ones */ 297164181Srrs struct sctp_queued_to_read *ctl; 298164181Srrs 299164181Srrs for (i = 0; i < asoc->streamincnt; i++) { 300164181Srrs ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 301164181Srrs while (ctl) { 302164181Srrs TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 303164181Srrs sctp_free_remote_addr(ctl->whoFrom); 304164181Srrs sctp_m_freem(ctl->data); 305164181Srrs ctl->data = NULL; 306164181Srrs sctp_free_a_readq(stcb, ctl); 307164181Srrs ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 308164181Srrs } 309164181Srrs } 310163953Srrs SCTP_FREE(asoc->strmin); 311163953Srrs } 312164181Srrs asoc->streamincnt = ntohs(init->num_outbound_streams); 313164181Srrs if (asoc->streamincnt > MAX_SCTP_STREAMS) { 314164181Srrs asoc->streamincnt = MAX_SCTP_STREAMS; 315164181Srrs } 316163953Srrs SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt * 317163953Srrs sizeof(struct sctp_stream_in), "StreamsIn"); 318163953Srrs if (asoc->strmin == NULL) { 319163953Srrs /* we didn't get memory for the streams! */ 320163953Srrs#ifdef SCTP_DEBUG 321163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 322163953Srrs printf("process_init: couldn't get memory for the streams!\n"); 323163953Srrs } 324163953Srrs#endif 325163953Srrs return (-1); 326163953Srrs } 327163953Srrs for (i = 0; i < asoc->streamincnt; i++) { 328163953Srrs asoc->strmin[i].stream_no = i; 329163953Srrs asoc->strmin[i].last_sequence_delivered = 0xffff; 330163953Srrs /* 331163953Srrs * U-stream ranges will be set when the cookie is unpacked. 332163953Srrs * Or for the INIT sender they are un set (if pr-sctp not 333163953Srrs * supported) when the INIT-ACK arrives. 334163953Srrs */ 335163953Srrs TAILQ_INIT(&asoc->strmin[i].inqueue); 336163953Srrs /* 337163953Srrs * we are not on any wheel, pr-sctp streams will go on the 338163953Srrs * wheel when they have data waiting for reorder. 339163953Srrs */ 340163953Srrs asoc->strmin[i].next_spoke.tqe_next = 0; 341163953Srrs asoc->strmin[i].next_spoke.tqe_prev = 0; 342163953Srrs } 343163953Srrs 344163953Srrs /* 345163953Srrs * load_address_from_init will put the addresses into the 346163953Srrs * association when the COOKIE is processed or the INIT-ACK is 347163953Srrs * processed. Both types of COOKIE's existing and new call this 348163953Srrs * routine. It will remove addresses that are no longer in the 349163953Srrs * association (for the restarting case where addresses are 350163953Srrs * removed). Up front when the INIT arrives we will discard it if it 351163953Srrs * is a restart and new addresses have been added. 352163953Srrs */ 353163953Srrs return (0); 354163953Srrs} 355163953Srrs 356163953Srrs/* 357163953Srrs * INIT-ACK message processing/consumption returns value < 0 on error 358163953Srrs */ 359163953Srrsstatic int 360163953Srrssctp_process_init_ack(struct mbuf *m, int iphlen, int offset, 361163953Srrs struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 362163953Srrs struct sctp_nets *net) 363163953Srrs{ 364163953Srrs struct sctp_association *asoc; 365163953Srrs struct mbuf *op_err; 366163953Srrs int retval, abort_flag; 367163953Srrs uint32_t initack_limit; 368163953Srrs 369163953Srrs /* First verify that we have no illegal param's */ 370163953Srrs abort_flag = 0; 371163953Srrs op_err = NULL; 372163953Srrs 373163953Srrs op_err = sctp_arethere_unrecognized_parameters(m, 374163953Srrs (offset + sizeof(struct sctp_init_chunk)), 375163953Srrs &abort_flag, (struct sctp_chunkhdr *)cp); 376163953Srrs if (abort_flag) { 377163953Srrs /* Send an abort and notify peer */ 378163953Srrs if (op_err != NULL) { 379163953Srrs sctp_send_operr_to(m, iphlen, op_err, cp->init.initiate_tag); 380163953Srrs } else { 381163953Srrs /* 382163953Srrs * Just notify (abort_assoc does this if we send an 383163953Srrs * abort). 384163953Srrs */ 385163953Srrs sctp_abort_notification(stcb, 0); 386163953Srrs /* 387163953Srrs * No sense in further INIT's since we will get the 388163953Srrs * same param back 389163953Srrs */ 390165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3); 391163953Srrs } 392163953Srrs return (-1); 393163953Srrs } 394163953Srrs asoc = &stcb->asoc; 395163953Srrs /* process the peer's parameters in the INIT-ACK */ 396163953Srrs retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb, net); 397163953Srrs if (retval < 0) { 398163953Srrs return (retval); 399163953Srrs } 400163953Srrs initack_limit = offset + ntohs(cp->ch.chunk_length); 401163953Srrs /* load all addresses */ 402163953Srrs if ((retval = sctp_load_addresses_from_init(stcb, m, iphlen, 403163953Srrs (offset + sizeof(struct sctp_init_chunk)), initack_limit, sh, 404163953Srrs NULL))) { 405163953Srrs /* Huh, we should abort */ 406163953Srrs#ifdef SCTP_DEBUG 407163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 408163953Srrs printf("Load addresses from INIT causes an abort %d\n", retval); 409163953Srrs } 410163953Srrs#endif 411163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 412163953Srrs NULL); 413163953Srrs return (-1); 414163953Srrs } 415163953Srrs stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs, 416163953Srrs stcb->asoc.local_hmacs); 417163953Srrs if (op_err) { 418163953Srrs sctp_queue_op_err(stcb, op_err); 419163953Srrs /* queuing will steal away the mbuf chain to the out queue */ 420163953Srrs op_err = NULL; 421163953Srrs } 422163953Srrs /* extract the cookie and queue it to "echo" it back... */ 423163953Srrs stcb->asoc.overall_error_count = 0; 424163953Srrs net->error_count = 0; 425163953Srrs 426163953Srrs /* 427163953Srrs * Cancel the INIT timer, We do this first before queueing the 428163953Srrs * cookie. We always cancel at the primary to assue that we are 429163953Srrs * canceling the timer started by the INIT which always goes to the 430163953Srrs * primary. 431163953Srrs */ 432163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb, 433165220Srrs asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4); 434163953Srrs 435165220Srrs /* calculate the RTO */ 436165220Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered); 437165220Srrs 438163953Srrs retval = sctp_send_cookie_echo(m, offset, stcb, net); 439163953Srrs if (retval < 0) { 440163953Srrs /* 441163953Srrs * No cookie, we probably should send a op error. But in any 442163953Srrs * case if there is no cookie in the INIT-ACK, we can 443163953Srrs * abandon the peer, its broke. 444163953Srrs */ 445163953Srrs if (retval == -3) { 446163953Srrs /* We abort with an error of missing mandatory param */ 447163953Srrs struct mbuf *op_err; 448163953Srrs 449163953Srrs op_err = 450163953Srrs sctp_generate_invmanparam(SCTP_CAUSE_MISSING_PARAM); 451163953Srrs if (op_err) { 452163953Srrs /* 453163953Srrs * Expand beyond to include the mandatory 454163953Srrs * param cookie 455163953Srrs */ 456163953Srrs struct sctp_inv_mandatory_param *mp; 457163953Srrs 458165647Srrs SCTP_BUF_LEN(op_err) = 459163953Srrs sizeof(struct sctp_inv_mandatory_param); 460163953Srrs mp = mtod(op_err, 461163953Srrs struct sctp_inv_mandatory_param *); 462163953Srrs /* Subtract the reserved param */ 463163953Srrs mp->length = 464163953Srrs htons(sizeof(struct sctp_inv_mandatory_param) - 2); 465163953Srrs mp->num_param = htonl(1); 466163953Srrs mp->param = htons(SCTP_STATE_COOKIE); 467163953Srrs mp->resv = 0; 468163953Srrs } 469163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, 470163953Srrs sh, op_err); 471163953Srrs } 472163953Srrs return (retval); 473163953Srrs } 474163953Srrs return (0); 475163953Srrs} 476163953Srrs 477163953Srrsstatic void 478163953Srrssctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp, 479163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 480163953Srrs{ 481163953Srrs struct sockaddr_storage store; 482163953Srrs struct sockaddr_in *sin; 483163953Srrs struct sockaddr_in6 *sin6; 484163953Srrs struct sctp_nets *r_net; 485163953Srrs struct timeval tv; 486163953Srrs 487163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) { 488163953Srrs /* Invalid length */ 489163953Srrs return; 490163953Srrs } 491163953Srrs sin = (struct sockaddr_in *)&store; 492163953Srrs sin6 = (struct sockaddr_in6 *)&store; 493163953Srrs 494163953Srrs memset(&store, 0, sizeof(store)); 495163953Srrs if (cp->heartbeat.hb_info.addr_family == AF_INET && 496163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) { 497163953Srrs sin->sin_family = cp->heartbeat.hb_info.addr_family; 498163953Srrs sin->sin_len = cp->heartbeat.hb_info.addr_len; 499163953Srrs sin->sin_port = stcb->rport; 500163953Srrs memcpy(&sin->sin_addr, cp->heartbeat.hb_info.address, 501163953Srrs sizeof(sin->sin_addr)); 502163953Srrs } else if (cp->heartbeat.hb_info.addr_family == AF_INET6 && 503163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) { 504163953Srrs sin6->sin6_family = cp->heartbeat.hb_info.addr_family; 505163953Srrs sin6->sin6_len = cp->heartbeat.hb_info.addr_len; 506163953Srrs sin6->sin6_port = stcb->rport; 507163953Srrs memcpy(&sin6->sin6_addr, cp->heartbeat.hb_info.address, 508163953Srrs sizeof(sin6->sin6_addr)); 509163953Srrs } else { 510163953Srrs return; 511163953Srrs } 512163953Srrs r_net = sctp_findnet(stcb, (struct sockaddr *)sin); 513163953Srrs if (r_net == NULL) { 514163953Srrs#ifdef SCTP_DEBUG 515163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 516163953Srrs printf("Huh? I can't find the address I sent it to, discard\n"); 517163953Srrs } 518163953Srrs#endif 519163953Srrs return; 520163953Srrs } 521163953Srrs if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) && 522163953Srrs (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) && 523163953Srrs (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) { 524163953Srrs /* 525163953Srrs * If the its a HB and it's random value is correct when can 526163953Srrs * confirm the destination. 527163953Srrs */ 528163953Srrs r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 529163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 530163953Srrs stcb, 0, (void *)r_net); 531163953Srrs } 532163953Srrs r_net->error_count = 0; 533163953Srrs r_net->hb_responded = 1; 534163953Srrs tv.tv_sec = cp->heartbeat.hb_info.time_value_1; 535163953Srrs tv.tv_usec = cp->heartbeat.hb_info.time_value_2; 536163953Srrs if (r_net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 537163953Srrs r_net->dest_state &= ~SCTP_ADDR_NOT_REACHABLE; 538163953Srrs r_net->dest_state |= SCTP_ADDR_REACHABLE; 539163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 540163953Srrs SCTP_HEARTBEAT_SUCCESS, (void *)r_net); 541163953Srrs /* now was it the primary? if so restore */ 542163953Srrs if (r_net->dest_state & SCTP_ADDR_WAS_PRIMARY) { 543163953Srrs sctp_set_primary_addr(stcb, (struct sockaddr *)NULL, r_net); 544163953Srrs } 545163953Srrs } 546163953Srrs /* Now lets do a RTO with this */ 547163953Srrs r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv); 548163953Srrs} 549163953Srrs 550163953Srrsstatic void 551163953Srrssctp_handle_abort(struct sctp_abort_chunk *cp, 552163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 553163953Srrs{ 554163953Srrs 555163953Srrs#ifdef SCTP_DEBUG 556163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 557163953Srrs printf("sctp_handle_abort: handling ABORT\n"); 558163953Srrs } 559163953Srrs#endif 560163953Srrs if (stcb == NULL) 561163953Srrs return; 562163953Srrs /* verify that the destination addr is in the association */ 563163953Srrs /* ignore abort for addresses being deleted */ 564163953Srrs 565163953Srrs /* stop any receive timers */ 566165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5); 567163953Srrs /* notify user of the abort and clean up... */ 568163953Srrs sctp_abort_notification(stcb, 0); 569163953Srrs /* free the tcb */ 570163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_aborted); 571163953Srrs if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 572163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 573163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 574163953Srrs } 575165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_6); 576163953Srrs#ifdef SCTP_DEBUG 577163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 578163953Srrs printf("sctp_handle_abort: finished\n"); 579163953Srrs } 580163953Srrs#endif 581163953Srrs} 582163953Srrs 583163953Srrsstatic void 584163953Srrssctp_handle_shutdown(struct sctp_shutdown_chunk *cp, 585163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag) 586163953Srrs{ 587163953Srrs struct sctp_association *asoc; 588163953Srrs int some_on_streamwheel; 589163953Srrs 590163953Srrs#ifdef SCTP_DEBUG 591163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 592163953Srrs printf("sctp_handle_shutdown: handling SHUTDOWN\n"); 593163953Srrs } 594163953Srrs#endif 595163953Srrs if (stcb == NULL) 596163953Srrs return; 597165220Srrs asoc = &stcb->asoc; 598165220Srrs if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 599165220Srrs (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 600163953Srrs return; 601163953Srrs } 602163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) { 603163953Srrs /* Shutdown NOT the expected size */ 604163953Srrs return; 605163953Srrs } else { 606163953Srrs sctp_update_acked(stcb, cp, net, abort_flag); 607163953Srrs } 608165220Srrs if (asoc->control_pdapi) { 609163953Srrs /* 610163953Srrs * With a normal shutdown we assume the end of last record. 611163953Srrs */ 612163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 613165220Srrs asoc->control_pdapi->end_added = 1; 614165220Srrs asoc->control_pdapi->pdapi_aborted = 1; 615165220Srrs asoc->control_pdapi = NULL; 616163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 617163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 618163953Srrs } 619163953Srrs /* goto SHUTDOWN_RECEIVED state to block new requests */ 620163953Srrs if (stcb->sctp_socket) { 621163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 622163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) { 623163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_RECEIVED; 624163953Srrs /* 625163953Srrs * notify upper layer that peer has initiated a 626163953Srrs * shutdown 627163953Srrs */ 628163953Srrs sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL); 629163953Srrs 630163953Srrs /* reset time */ 631163953Srrs SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 632163953Srrs } 633163953Srrs } 634163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) { 635163953Srrs /* 636163953Srrs * stop the shutdown timer, since we WILL move to 637163953Srrs * SHUTDOWN-ACK-SENT. 638163953Srrs */ 639165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_7); 640163953Srrs } 641163953Srrs /* Now are we there yet? */ 642163953Srrs some_on_streamwheel = 0; 643163953Srrs if (!TAILQ_EMPTY(&asoc->out_wheel)) { 644163953Srrs /* Check to see if some data queued */ 645163953Srrs struct sctp_stream_out *outs; 646163953Srrs 647163953Srrs TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) { 648163953Srrs if (!TAILQ_EMPTY(&outs->outqueue)) { 649163953Srrs some_on_streamwheel = 1; 650163953Srrs break; 651163953Srrs } 652163953Srrs } 653163953Srrs } 654163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 655163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 656163953Srrs some_on_streamwheel) { 657163953Srrs /* By returning we will push more data out */ 658163953Srrs return; 659163953Srrs } else { 660163953Srrs /* no outstanding data to send, so move on... */ 661163953Srrs /* send SHUTDOWN-ACK */ 662163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 663163953Srrs /* move to SHUTDOWN-ACK-SENT state */ 664163953Srrs if (asoc->state == SCTP_STATE_SHUTDOWN_RECEIVED) { 665163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 666163953Srrs } 667163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_ACK_SENT; 668163953Srrs 669163953Srrs /* start SHUTDOWN timer */ 670163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, 671163953Srrs stcb, net); 672163953Srrs } 673163953Srrs} 674163953Srrs 675163953Srrsstatic void 676163953Srrssctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp, 677163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 678163953Srrs{ 679163953Srrs struct sctp_association *asoc; 680163953Srrs 681163953Srrs#ifdef SCTP_DEBUG 682163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 683163953Srrs printf("sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n"); 684163953Srrs } 685163953Srrs#endif 686163953Srrs if (stcb == NULL) 687163953Srrs return; 688163953Srrs 689163953Srrs asoc = &stcb->asoc; 690163953Srrs /* process according to association state */ 691163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 692163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 693163953Srrs /* unexpected SHUTDOWN-ACK... so ignore... */ 694163953Srrs SCTP_TCB_UNLOCK(stcb); 695163953Srrs return; 696163953Srrs } 697165220Srrs if (asoc->control_pdapi) { 698163953Srrs /* 699163953Srrs * With a normal shutdown we assume the end of last record. 700163953Srrs */ 701163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 702165220Srrs asoc->control_pdapi->end_added = 1; 703165220Srrs asoc->control_pdapi->pdapi_aborted = 1; 704165220Srrs asoc->control_pdapi = NULL; 705163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 706163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 707163953Srrs } 708163953Srrs /* are the queues empty? */ 709163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 710163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 711163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 712164205Srrs sctp_report_all_outbound(stcb, 0); 713163953Srrs } 714163953Srrs /* stop the timer */ 715165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_8); 716163953Srrs /* send SHUTDOWN-COMPLETE */ 717163953Srrs sctp_send_shutdown_complete(stcb, net); 718163953Srrs /* notify upper layer protocol */ 719163953Srrs if (stcb->sctp_socket) { 720163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 721163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 722163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 723163953Srrs /* Set the connected flag to disconnected */ 724163953Srrs stcb->sctp_ep->sctp_socket->so_snd.sb_cc = 0; 725163953Srrs } 726163953Srrs } 727163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 728163953Srrs /* free the TCB but first save off the ep */ 729165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, 730165220Srrs SCTP_FROM_SCTP_INPUT + SCTP_LOC_9); 731163953Srrs} 732163953Srrs 733163953Srrs/* 734163953Srrs * Skip past the param header and then we will find the chunk that caused the 735163953Srrs * problem. There are two possiblities ASCONF or FWD-TSN other than that and 736163953Srrs * our peer must be broken. 737163953Srrs */ 738163953Srrsstatic void 739163953Srrssctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr, 740163953Srrs struct sctp_nets *net) 741163953Srrs{ 742163953Srrs struct sctp_chunkhdr *chk; 743163953Srrs 744163953Srrs chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr)); 745163953Srrs switch (chk->chunk_type) { 746163953Srrs case SCTP_ASCONF_ACK: 747163953Srrs case SCTP_ASCONF: 748163953Srrs sctp_asconf_cleanup(stcb, net); 749163953Srrs break; 750163953Srrs case SCTP_FORWARD_CUM_TSN: 751163953Srrs stcb->asoc.peer_supports_prsctp = 0; 752163953Srrs break; 753163953Srrs default: 754163953Srrs#ifdef SCTP_DEBUG 755163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 756163953Srrs printf("Peer does not support chunk type %d(%x)??\n", 757163953Srrs chk->chunk_type, (uint32_t) chk->chunk_type); 758163953Srrs } 759163953Srrs#endif 760163953Srrs break; 761163953Srrs } 762163953Srrs} 763163953Srrs 764163953Srrs/* 765163953Srrs * Skip past the param header and then we will find the param that caused the 766163953Srrs * problem. There are a number of param's in a ASCONF OR the prsctp param 767163953Srrs * these will turn of specific features. 768163953Srrs */ 769163953Srrsstatic void 770163953Srrssctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr) 771163953Srrs{ 772163953Srrs struct sctp_paramhdr *pbad; 773163953Srrs 774163953Srrs pbad = phdr + 1; 775163953Srrs switch (ntohs(pbad->param_type)) { 776163953Srrs /* pr-sctp draft */ 777163953Srrs case SCTP_PRSCTP_SUPPORTED: 778163953Srrs stcb->asoc.peer_supports_prsctp = 0; 779163953Srrs break; 780163953Srrs case SCTP_SUPPORTED_CHUNK_EXT: 781163953Srrs break; 782163953Srrs /* draft-ietf-tsvwg-addip-sctp */ 783163953Srrs case SCTP_ECN_NONCE_SUPPORTED: 784163953Srrs stcb->asoc.peer_supports_ecn_nonce = 0; 785163953Srrs stcb->asoc.ecn_nonce_allowed = 0; 786163953Srrs stcb->asoc.ecn_allowed = 0; 787163953Srrs break; 788163953Srrs case SCTP_ADD_IP_ADDRESS: 789163953Srrs case SCTP_DEL_IP_ADDRESS: 790163953Srrs case SCTP_SET_PRIM_ADDR: 791163953Srrs stcb->asoc.peer_supports_asconf = 0; 792163953Srrs break; 793163953Srrs case SCTP_SUCCESS_REPORT: 794163953Srrs case SCTP_ERROR_CAUSE_IND: 795163953Srrs#ifdef SCTP_DEBUG 796163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 797163953Srrs printf("Huh, the peer does not support success? or error cause?\n"); 798163953Srrs printf("Turning off ASCONF to this strange peer\n"); 799163953Srrs } 800163953Srrs#endif 801163953Srrs stcb->asoc.peer_supports_asconf = 0; 802163953Srrs break; 803163953Srrs default: 804163953Srrs#ifdef SCTP_DEBUG 805163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 806163953Srrs printf("Peer does not support param type %d(%x)??\n", 807163953Srrs pbad->param_type, (uint32_t) pbad->param_type); 808163953Srrs } 809163953Srrs#endif 810163953Srrs break; 811163953Srrs } 812163953Srrs} 813163953Srrs 814163953Srrsstatic int 815163953Srrssctp_handle_error(struct sctp_chunkhdr *ch, 816163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 817163953Srrs{ 818163953Srrs int chklen; 819163953Srrs struct sctp_paramhdr *phdr; 820163953Srrs uint16_t error_type; 821163953Srrs uint16_t error_len; 822163953Srrs struct sctp_association *asoc; 823163953Srrs 824163953Srrs int adjust; 825163953Srrs 826163953Srrs /* parse through all of the errors and process */ 827163953Srrs asoc = &stcb->asoc; 828163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)ch + 829163953Srrs sizeof(struct sctp_chunkhdr)); 830163953Srrs chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr); 831163953Srrs while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) { 832163953Srrs /* Process an Error Cause */ 833163953Srrs error_type = ntohs(phdr->param_type); 834163953Srrs error_len = ntohs(phdr->param_length); 835163953Srrs if ((error_len > chklen) || (error_len == 0)) { 836163953Srrs /* invalid param length for this param */ 837163953Srrs#ifdef SCTP_DEBUG 838163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 839163953Srrs printf("Bogus length in error param- chunk left:%d errorlen:%d\n", 840163953Srrs chklen, error_len); 841163953Srrs } 842163953Srrs#endif /* SCTP_DEBUG */ 843163953Srrs return (0); 844163953Srrs } 845163953Srrs switch (error_type) { 846163953Srrs case SCTP_CAUSE_INVALID_STREAM: 847163953Srrs case SCTP_CAUSE_MISSING_PARAM: 848163953Srrs case SCTP_CAUSE_INVALID_PARAM: 849163953Srrs case SCTP_CAUSE_NO_USER_DATA: 850163953Srrs#ifdef SCTP_DEBUG 851163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 852163953Srrs printf("Software error we got a %d back? We have a bug :/ (or do they?)\n", 853163953Srrs error_type); 854163953Srrs } 855163953Srrs#endif 856163953Srrs break; 857163953Srrs case SCTP_CAUSE_STALE_COOKIE: 858163953Srrs /* 859163953Srrs * We only act if we have echoed a cookie and are 860163953Srrs * waiting. 861163953Srrs */ 862163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 863163953Srrs int *p; 864163953Srrs 865163953Srrs p = (int *)((caddr_t)phdr + sizeof(*phdr)); 866163953Srrs /* Save the time doubled */ 867163953Srrs asoc->cookie_preserve_req = ntohl(*p) << 1; 868163953Srrs asoc->stale_cookie_count++; 869163953Srrs if (asoc->stale_cookie_count > 870163953Srrs asoc->max_init_times) { 871163953Srrs sctp_abort_notification(stcb, 0); 872163953Srrs /* now free the asoc */ 873165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_10); 874163953Srrs return (-1); 875163953Srrs } 876163953Srrs /* blast back to INIT state */ 877163953Srrs asoc->state &= ~SCTP_STATE_COOKIE_ECHOED; 878163953Srrs asoc->state |= SCTP_STATE_COOKIE_WAIT; 879163953Srrs 880163953Srrs sctp_stop_all_cookie_timers(stcb); 881163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 882163953Srrs } 883163953Srrs break; 884163953Srrs case SCTP_CAUSE_UNRESOLVABLE_ADDR: 885163953Srrs /* 886163953Srrs * Nothing we can do here, we don't do hostname 887163953Srrs * addresses so if the peer does not like my IPv6 888163953Srrs * (or IPv4 for that matter) it does not matter. If 889163953Srrs * they don't support that type of address, they can 890163953Srrs * NOT possibly get that packet type... i.e. with no 891163953Srrs * IPv6 you can't recieve a IPv6 packet. so we can 892163953Srrs * safely ignore this one. If we ever added support 893163953Srrs * for HOSTNAME Addresses, then we would need to do 894163953Srrs * something here. 895163953Srrs */ 896163953Srrs break; 897163953Srrs case SCTP_CAUSE_UNRECOG_CHUNK: 898163953Srrs sctp_process_unrecog_chunk(stcb, phdr, net); 899163953Srrs break; 900163953Srrs case SCTP_CAUSE_UNRECOG_PARAM: 901163953Srrs sctp_process_unrecog_param(stcb, phdr); 902163953Srrs break; 903163953Srrs case SCTP_CAUSE_COOKIE_IN_SHUTDOWN: 904163953Srrs /* 905163953Srrs * We ignore this since the timer will drive out a 906163953Srrs * new cookie anyway and there timer will drive us 907163953Srrs * to send a SHUTDOWN_COMPLETE. We can't send one 908163953Srrs * here since we don't have their tag. 909163953Srrs */ 910163953Srrs break; 911163953Srrs case SCTP_CAUSE_DELETING_LAST_ADDR: 912163953Srrs case SCTP_CAUSE_RESOURCE_SHORTAGE: 913163953Srrs case SCTP_CAUSE_DELETING_SRC_ADDR: 914163953Srrs /* 915163953Srrs * We should NOT get these here, but in a 916163953Srrs * ASCONF-ACK. n 917163953Srrs */ 918163953Srrs#ifdef SCTP_DEBUG 919163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 920163953Srrs printf("Peer sends ASCONF errors in a Operational Error?<%d>?\n", 921163953Srrs error_type); 922163953Srrs } 923163953Srrs#endif 924163953Srrs break; 925163953Srrs case SCTP_CAUSE_OUT_OF_RESC: 926163953Srrs /* 927163953Srrs * And what, pray tell do we do with the fact that 928163953Srrs * the peer is out of resources? Not really sure we 929163953Srrs * could do anything but abort. I suspect this n * 930163953Srrs * should have came WITH an abort instead of in a 931163953Srrs * OP-ERROR. 932163953Srrs */ 933163953Srrs break; 934163953Srrs default: 935163953Srrs#ifdef SCTP_DEBUG 936163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 937163953Srrs /* don't know what this error cause is... */ 938163953Srrs printf("sctp_handle_error: unknown error type = 0x%xh\n", 939163953Srrs error_type); 940163953Srrs } 941163953Srrs#endif /* SCTP_DEBUG */ 942163953Srrs break; 943163953Srrs } 944163953Srrs adjust = SCTP_SIZE32(error_len); 945163953Srrs chklen -= adjust; 946163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust); 947163953Srrs } 948163953Srrs return (0); 949163953Srrs} 950163953Srrs 951163953Srrsstatic int 952163953Srrssctp_handle_init_ack(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, 953163953Srrs struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 954163953Srrs struct sctp_nets *net) 955163953Srrs{ 956163953Srrs struct sctp_init_ack *init_ack; 957163953Srrs int *state; 958163953Srrs struct mbuf *op_err; 959163953Srrs 960163953Srrs#ifdef SCTP_DEBUG 961163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 962163953Srrs printf("sctp_handle_init_ack: handling INIT-ACK\n"); 963163953Srrs } 964163953Srrs#endif 965163953Srrs if (stcb == NULL) { 966163953Srrs#ifdef SCTP_DEBUG 967163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 968163953Srrs printf("sctp_handle_init_ack: TCB is null\n"); 969163953Srrs } 970163953Srrs#endif 971163953Srrs return (-1); 972163953Srrs } 973163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) { 974163953Srrs /* Invalid length */ 975163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 976163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 977163953Srrs op_err); 978163953Srrs return (-1); 979163953Srrs } 980163953Srrs init_ack = &cp->init; 981163953Srrs /* validate parameters */ 982163953Srrs if (init_ack->initiate_tag == 0) { 983163953Srrs /* protocol error... send an abort */ 984163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 985163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 986163953Srrs op_err); 987163953Srrs return (-1); 988163953Srrs } 989163953Srrs if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) { 990163953Srrs /* protocol error... send an abort */ 991163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 992163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 993163953Srrs op_err); 994163953Srrs return (-1); 995163953Srrs } 996163953Srrs if (init_ack->num_inbound_streams == 0) { 997163953Srrs /* protocol error... send an abort */ 998163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 999163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 1000163953Srrs op_err); 1001163953Srrs return (-1); 1002163953Srrs } 1003163953Srrs if (init_ack->num_outbound_streams == 0) { 1004163953Srrs /* protocol error... send an abort */ 1005163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 1006163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 1007163953Srrs op_err); 1008163953Srrs return (-1); 1009163953Srrs } 1010163953Srrs /* process according to association state... */ 1011163953Srrs state = &stcb->asoc.state; 1012163953Srrs switch (*state & SCTP_STATE_MASK) { 1013163953Srrs case SCTP_STATE_COOKIE_WAIT: 1014163953Srrs /* this is the expected state for this chunk */ 1015163953Srrs /* process the INIT-ACK parameters */ 1016163953Srrs if (stcb->asoc.primary_destination->dest_state & 1017163953Srrs SCTP_ADDR_UNCONFIRMED) { 1018163953Srrs /* 1019163953Srrs * The primary is where we sent the INIT, we can 1020163953Srrs * always consider it confirmed when the INIT-ACK is 1021163953Srrs * returned. Do this before we load addresses 1022163953Srrs * though. 1023163953Srrs */ 1024163953Srrs stcb->asoc.primary_destination->dest_state &= 1025163953Srrs ~SCTP_ADDR_UNCONFIRMED; 1026163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 1027163953Srrs stcb, 0, (void *)stcb->asoc.primary_destination); 1028163953Srrs } 1029163953Srrs if (sctp_process_init_ack(m, iphlen, offset, sh, cp, stcb, net 1030163953Srrs ) < 0) { 1031163953Srrs /* error in parsing parameters */ 1032163953Srrs return (-1); 1033163953Srrs } 1034163953Srrs /* update our state */ 1035163953Srrs#ifdef SCTP_DEBUG 1036163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 1037163953Srrs printf("moving to COOKIE-ECHOED state\n"); 1038163953Srrs } 1039163953Srrs#endif 1040163953Srrs if (*state & SCTP_STATE_SHUTDOWN_PENDING) { 1041163953Srrs *state = SCTP_STATE_COOKIE_ECHOED | 1042163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 1043163953Srrs } else { 1044163953Srrs *state = SCTP_STATE_COOKIE_ECHOED; 1045163953Srrs } 1046163953Srrs 1047163953Srrs /* reset the RTO calc */ 1048163953Srrs stcb->asoc.overall_error_count = 0; 1049163953Srrs SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1050163953Srrs /* 1051163953Srrs * collapse the init timer back in case of a exponential 1052165220Srrs * backoff 1053163953Srrs */ 1054163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep, 1055163953Srrs stcb, net); 1056163953Srrs /* 1057163953Srrs * the send at the end of the inbound data processing will 1058163953Srrs * cause the cookie to be sent 1059163953Srrs */ 1060163953Srrs break; 1061163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 1062163953Srrs /* incorrect state... discard */ 1063163953Srrs break; 1064163953Srrs case SCTP_STATE_COOKIE_ECHOED: 1065163953Srrs /* incorrect state... discard */ 1066163953Srrs break; 1067163953Srrs case SCTP_STATE_OPEN: 1068163953Srrs /* incorrect state... discard */ 1069163953Srrs break; 1070163953Srrs case SCTP_STATE_EMPTY: 1071163953Srrs case SCTP_STATE_INUSE: 1072163953Srrs default: 1073163953Srrs /* incorrect state... discard */ 1074163953Srrs return (-1); 1075163953Srrs break; 1076163953Srrs } /* end switch asoc state */ 1077163953Srrs#ifdef SCTP_DEBUG 1078163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1079163953Srrs printf("Leaving handle-init-ack end\n"); 1080163953Srrs } 1081163953Srrs#endif 1082163953Srrs return (0); 1083163953Srrs} 1084163953Srrs 1085163953Srrs 1086163953Srrs/* 1087163953Srrs * handle a state cookie for an existing association m: input packet mbuf 1088163953Srrs * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a 1089163953Srrs * "split" mbuf and the cookie signature does not exist offset: offset into 1090163953Srrs * mbuf to the cookie-echo chunk 1091163953Srrs */ 1092163953Srrsstatic struct sctp_tcb * 1093163953Srrssctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset, 1094163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1095163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 1096163953Srrs struct sockaddr *init_src, int *notification, sctp_assoc_t * sac_assoc_id) 1097163953Srrs{ 1098163953Srrs struct sctp_association *asoc; 1099163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1100163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1101163953Srrs int chk_length; 1102165220Srrs int init_offset, initack_offset, i; 1103163953Srrs int retval; 1104164205Srrs int spec_flag = 0; 1105163953Srrs 1106163953Srrs /* I know that the TCB is non-NULL from the caller */ 1107163953Srrs asoc = &stcb->asoc; 1108163953Srrs 1109163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) { 1110163953Srrs /* SHUTDOWN came in after sending INIT-ACK */ 1111163953Srrs struct mbuf *op_err; 1112163953Srrs struct sctp_paramhdr *ph; 1113163953Srrs 1114163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 1115163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 1116165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 1117163953Srrs if (op_err == NULL) { 1118163953Srrs /* FOOBAR */ 1119163953Srrs return (NULL); 1120163953Srrs } 1121163953Srrs /* pre-reserve some space */ 1122165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 1123165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 1124165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 1125163953Srrs /* Set the len */ 1126165647Srrs SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 1127163953Srrs ph = mtod(op_err, struct sctp_paramhdr *); 1128163953Srrs ph->param_type = htons(SCTP_CAUSE_COOKIE_IN_SHUTDOWN); 1129163953Srrs ph->param_length = htons(sizeof(struct sctp_paramhdr)); 1130163953Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag); 1131163953Srrs return (NULL); 1132163953Srrs } 1133163953Srrs /* 1134163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1135163953Srrs * INIT should start after the cookie-echo header struct (chunk 1136163953Srrs * header, state cookie header struct) 1137163953Srrs */ 1138163953Srrs init_offset = offset += sizeof(struct sctp_cookie_echo_chunk); 1139163953Srrs 1140163953Srrs init_cp = (struct sctp_init_chunk *) 1141163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1142163953Srrs (uint8_t *) & init_buf); 1143163953Srrs if (init_cp == NULL) { 1144163953Srrs /* could not pull a INIT chunk in cookie */ 1145163953Srrs return (NULL); 1146163953Srrs } 1147163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1148163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1149163953Srrs return (NULL); 1150163953Srrs } 1151163953Srrs /* 1152163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1153163953Srrs * INIT-ACK follows the INIT chunk 1154163953Srrs */ 1155163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1156163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1157163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1158163953Srrs (uint8_t *) & initack_buf); 1159163953Srrs if (initack_cp == NULL) { 1160163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1161163953Srrs return (NULL); 1162163953Srrs } 1163163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1164163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1165163953Srrs return (NULL); 1166163953Srrs } 1167163953Srrs if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) && 1168163953Srrs (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) { 1169163953Srrs /* 1170163953Srrs * case D in Section 5.2.4 Table 2: MMAA process accordingly 1171163953Srrs * to get into the OPEN state 1172163953Srrs */ 1173163953Srrs switch SCTP_GET_STATE 1174163953Srrs (asoc) { 1175163953Srrs case SCTP_STATE_COOKIE_WAIT: 1176163953Srrs /* 1177163953Srrs * INIT was sent, but got got a COOKIE_ECHO with the 1178163953Srrs * correct tags... just accept it... 1179163953Srrs */ 1180163953Srrs /* First we must process the INIT !! */ 1181163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1182163953Srrs if (retval < 0) { 1183163953Srrs return (NULL); 1184163953Srrs } 1185163953Srrs /* intentional fall through to below... */ 1186163953Srrs 1187163953Srrs case SCTP_STATE_COOKIE_ECHOED: 1188163953Srrs /* Duplicate INIT case */ 1189163953Srrs /* we have already processed the INIT so no problem */ 1190163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, 1191165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_11); 1192165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_12); 1193163953Srrs /* update current state */ 1194163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1195163953Srrs asoc->state = SCTP_STATE_OPEN | 1196163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 1197163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1198163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1199163953Srrs 1200163953Srrs } else if ((asoc->state & SCTP_STATE_SHUTDOWN_SENT) == 0) { 1201163953Srrs /* if ok, move to OPEN state */ 1202163953Srrs asoc->state = SCTP_STATE_OPEN; 1203163953Srrs } 1204165220Srrs sctp_stop_all_cookie_timers(stcb); 1205163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1206163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1207163953Srrs (inp->sctp_socket->so_qlimit == 0) 1208163953Srrs ) { 1209163953Srrs /* 1210163953Srrs * Here is where collision would go if we 1211163953Srrs * did a connect() and instead got a 1212163953Srrs * init/init-ack/cookie done before the 1213163953Srrs * init-ack came back.. 1214163953Srrs */ 1215163953Srrs stcb->sctp_ep->sctp_flags |= 1216163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1217163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1218163953Srrs } 1219163953Srrs /* notify upper layer */ 1220163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1221163953Srrs /* 1222163953Srrs * since we did not send a HB make sure we don't 1223163953Srrs * double things 1224163953Srrs */ 1225163953Srrs net->hb_responded = 1; 1226163953Srrs 1227163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1228163953Srrs (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) { 1229163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 1230163953Srrs inp, stcb, NULL); 1231163953Srrs } 1232163953Srrs break; 1233163953Srrs default: 1234163953Srrs /* 1235163953Srrs * we're in the OPEN state (or beyond), so peer must 1236163953Srrs * have simply lost the COOKIE-ACK 1237163953Srrs */ 1238163953Srrs break; 1239163953Srrs } /* end switch */ 1240165220Srrs sctp_stop_all_cookie_timers(stcb); 1241163953Srrs /* 1242163953Srrs * We ignore the return code here.. not sure if we should 1243163953Srrs * somehow abort.. but we do have an existing asoc. This 1244163953Srrs * really should not fail. 1245163953Srrs */ 1246163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1247163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1248163953Srrs initack_offset, sh, init_src)) { 1249163953Srrs return (NULL); 1250163953Srrs } 1251163953Srrs /* respond with a COOKIE-ACK */ 1252165220Srrs sctp_toss_old_cookies(stcb, asoc); 1253163953Srrs sctp_send_cookie_ack(stcb); 1254163953Srrs return (stcb); 1255163953Srrs } /* end if */ 1256163953Srrs if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1257163953Srrs ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag && 1258163953Srrs cookie->tie_tag_my_vtag == 0 && 1259163953Srrs cookie->tie_tag_peer_vtag == 0) { 1260163953Srrs /* 1261163953Srrs * case C in Section 5.2.4 Table 2: XMOO silently discard 1262163953Srrs */ 1263163953Srrs return (NULL); 1264163953Srrs } 1265163953Srrs if (ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag && 1266163953Srrs (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag || 1267163953Srrs init_cp->init.initiate_tag == 0)) { 1268163953Srrs /* 1269163953Srrs * case B in Section 5.2.4 Table 2: MXAA or MOAA my info 1270163953Srrs * should be ok, re-accept peer info 1271163953Srrs */ 1272165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_13); 1273163953Srrs sctp_stop_all_cookie_timers(stcb); 1274163953Srrs /* 1275163953Srrs * since we did not send a HB make sure we don't double 1276163953Srrs * things 1277163953Srrs */ 1278163953Srrs net->hb_responded = 1; 1279163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1280163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1281163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1282163953Srrs NULL); 1283163953Srrs } 1284163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1285164205Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1286164205Srrs 1287164205Srrs /* Note last_cwr_tsn? where is this used? */ 1288163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1289164205Srrs if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) { 1290164205Srrs /* 1291164205Srrs * Ok the peer probably discarded our data (if we 1292164205Srrs * echoed a cookie+data). So anything on the 1293164205Srrs * sent_queue should be marked for retransmit, we 1294164205Srrs * may not get something to kick us so it COULD 1295164205Srrs * still take a timeout to move these.. but it can't 1296164205Srrs * hurt to mark them. 1297164205Srrs */ 1298164205Srrs struct sctp_tmit_chunk *chk; 1299163953Srrs 1300164205Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1301164205Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 1302164205Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1303164205Srrs stcb->asoc.sent_queue_retran_cnt++; 1304164205Srrs spec_flag++; 1305164205Srrs } 1306164205Srrs } 1307164205Srrs 1308164205Srrs } 1309163953Srrs /* process the INIT info (peer's info) */ 1310163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1311163953Srrs if (retval < 0) { 1312163953Srrs return (NULL); 1313163953Srrs } 1314163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1315163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1316163953Srrs initack_offset, sh, init_src)) { 1317163953Srrs return (NULL); 1318163953Srrs } 1319163953Srrs if ((asoc->state & SCTP_STATE_COOKIE_WAIT) || 1320163953Srrs (asoc->state & SCTP_STATE_COOKIE_ECHOED)) { 1321163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1322163953Srrs 1323163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1324163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1325163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1326163953Srrs stcb->sctp_ep->sctp_flags |= 1327163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1328163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1329163953Srrs } 1330163953Srrs } 1331163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1332163953Srrs asoc->state = SCTP_STATE_OPEN | 1333163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 1334163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1335163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1336163953Srrs 1337163953Srrs } else { 1338163953Srrs asoc->state = SCTP_STATE_OPEN; 1339163953Srrs } 1340163953Srrs sctp_stop_all_cookie_timers(stcb); 1341165220Srrs sctp_toss_old_cookies(stcb, asoc); 1342163953Srrs sctp_send_cookie_ack(stcb); 1343164205Srrs if (spec_flag) { 1344164205Srrs /* 1345164205Srrs * only if we have retrans set do we do this. What 1346164205Srrs * this call does is get only the COOKIE-ACK out and 1347164205Srrs * then when we return the normal call to 1348164205Srrs * sctp_chunk_output will get the retrans out behind 1349164205Srrs * this. 1350164205Srrs */ 1351164205Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK); 1352164205Srrs } 1353163953Srrs return (stcb); 1354163953Srrs } 1355163953Srrs if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1356163953Srrs ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) && 1357163953Srrs cookie->tie_tag_my_vtag == asoc->my_vtag_nonce && 1358163953Srrs cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce && 1359163953Srrs cookie->tie_tag_peer_vtag != 0) { 1360163953Srrs struct sctpasochead *head; 1361163953Srrs 1362163953Srrs /* 1363163953Srrs * case A in Section 5.2.4 Table 2: XXMM (peer restarted) 1364163953Srrs */ 1365165220Srrs /* temp code */ 1366165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_14); 1367165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_15); 1368165647Srrs 1369163953Srrs *sac_assoc_id = sctp_get_associd(stcb); 1370163953Srrs /* notify upper layer */ 1371163953Srrs *notification = SCTP_NOTIFY_ASSOC_RESTART; 1372165220Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1373165647Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1374165647Srrs asoc->state = SCTP_STATE_OPEN | 1375165647Srrs SCTP_STATE_SHUTDOWN_PENDING; 1376165647Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1377165647Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1378165647Srrs 1379165647Srrs } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) { 1380165647Srrs /* move to OPEN state, if not in SHUTDOWN_SENT */ 1381165647Srrs asoc->state = SCTP_STATE_OPEN; 1382165647Srrs } 1383165647Srrs asoc->pre_open_streams = 1384165647Srrs ntohs(initack_cp->init.num_outbound_streams); 1385165647Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1386165647Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1387165647Srrs 1388165647Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1389165647Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1390165647Srrs 1391165647Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1392165647Srrs 1393165647Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1394165647Srrs if (asoc->mapping_array) 1395165647Srrs memset(asoc->mapping_array, 0, 1396165647Srrs asoc->mapping_array_size); 1397165220Srrs SCTP_TCB_UNLOCK(stcb); 1398165220Srrs SCTP_INP_INFO_WLOCK(); 1399165220Srrs SCTP_INP_WLOCK(stcb->sctp_ep); 1400165220Srrs SCTP_TCB_LOCK(stcb); 1401165220Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1402163953Srrs /* send up all the data */ 1403164205Srrs SCTP_TCB_SEND_LOCK(stcb); 1404165220Srrs 1405164205Srrs sctp_report_all_outbound(stcb, 1); 1406165220Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1407165220Srrs stcb->asoc.strmout[i].stream_no = i; 1408165220Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 1409165220Srrs stcb->asoc.strmout[i].last_msg_incomplete = 0; 1410165220Srrs } 1411163953Srrs /* process the INIT-ACK info (my info) */ 1412163953Srrs asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1413163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1414163953Srrs 1415163953Srrs /* pull from vtag hash */ 1416163953Srrs LIST_REMOVE(stcb, sctp_asocs); 1417163953Srrs /* re-insert to new vtag position */ 1418163953Srrs head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 1419163953Srrs sctppcbinfo.hashasocmark)]; 1420163953Srrs /* 1421163953Srrs * put it in the bucket in the vtag hash of assoc's for the 1422163953Srrs * system 1423163953Srrs */ 1424163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_asocs); 1425163953Srrs 1426163953Srrs /* Is this the first restart? */ 1427163953Srrs if (stcb->asoc.in_restart_hash == 0) { 1428163953Srrs /* Ok add it to assoc_id vtag hash */ 1429163953Srrs head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 1430163953Srrs sctppcbinfo.hashrestartmark)]; 1431163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_tcbrestarhash); 1432163953Srrs stcb->asoc.in_restart_hash = 1; 1433163953Srrs } 1434163953Srrs /* process the INIT info (peer's info) */ 1435164205Srrs SCTP_TCB_SEND_UNLOCK(stcb); 1436165220Srrs SCTP_INP_WUNLOCK(stcb->sctp_ep); 1437165220Srrs SCTP_INP_INFO_WUNLOCK(); 1438165220Srrs 1439163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1440163953Srrs if (retval < 0) { 1441163953Srrs return (NULL); 1442163953Srrs } 1443163953Srrs /* 1444163953Srrs * since we did not send a HB make sure we don't double 1445163953Srrs * things 1446163953Srrs */ 1447163953Srrs net->hb_responded = 1; 1448163953Srrs 1449163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1450163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1451163953Srrs initack_offset, sh, init_src)) { 1452163953Srrs return (NULL); 1453163953Srrs } 1454163953Srrs /* respond with a COOKIE-ACK */ 1455163953Srrs sctp_stop_all_cookie_timers(stcb); 1456165220Srrs sctp_toss_old_cookies(stcb, asoc); 1457163953Srrs sctp_send_cookie_ack(stcb); 1458163953Srrs 1459163953Srrs return (stcb); 1460163953Srrs } 1461163953Srrs /* if we are not a restart we need the assoc_id field pop'd */ 1462163953Srrs asoc->assoc_id = ntohl(initack_cp->init.initiate_tag); 1463163953Srrs 1464163953Srrs /* all other cases... */ 1465163953Srrs return (NULL); 1466163953Srrs} 1467163953Srrs 1468163953Srrs/* 1469163953Srrs * handle a state cookie for a new association m: input packet mbuf chain-- 1470163953Srrs * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf 1471163953Srrs * and the cookie signature does not exist offset: offset into mbuf to the 1472163953Srrs * cookie-echo chunk length: length of the cookie chunk to: where the init 1473163953Srrs * was from returns a new TCB 1474163953Srrs */ 1475163953Srrsstatic struct sctp_tcb * 1476163953Srrssctp_process_cookie_new(struct mbuf *m, int iphlen, int offset, 1477163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1478163953Srrs struct sctp_inpcb *inp, struct sctp_nets **netp, 1479163953Srrs struct sockaddr *init_src, int *notification, 1480163953Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len) 1481163953Srrs{ 1482163953Srrs struct sctp_tcb *stcb; 1483163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1484163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1485163953Srrs struct sockaddr_storage sa_store; 1486163953Srrs struct sockaddr *initack_src = (struct sockaddr *)&sa_store; 1487163953Srrs struct sockaddr_in *sin; 1488163953Srrs struct sockaddr_in6 *sin6; 1489163953Srrs struct sctp_association *asoc; 1490163953Srrs int chk_length; 1491163953Srrs int init_offset, initack_offset, initack_limit; 1492163953Srrs int retval; 1493163953Srrs int error = 0; 1494163953Srrs uint32_t old_tag; 1495163953Srrs uint8_t chunk_buf[DEFAULT_CHUNK_BUFFER]; 1496163953Srrs 1497163953Srrs /* 1498163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1499163953Srrs * INIT should start after the cookie-echo header struct (chunk 1500163953Srrs * header, state cookie header struct) 1501163953Srrs */ 1502163953Srrs init_offset = offset + sizeof(struct sctp_cookie_echo_chunk); 1503163953Srrs init_cp = (struct sctp_init_chunk *) 1504163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1505163953Srrs (uint8_t *) & init_buf); 1506163953Srrs if (init_cp == NULL) { 1507163953Srrs /* could not pull a INIT chunk in cookie */ 1508163953Srrs#ifdef SCTP_DEBUG 1509163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1510163953Srrs printf("process_cookie_new: could not pull INIT chunk hdr\n"); 1511163953Srrs } 1512163953Srrs#endif /* SCTP_DEBUG */ 1513163953Srrs return (NULL); 1514163953Srrs } 1515163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1516163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1517163953Srrs#ifdef SCTP_DEBUG 1518163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1519163953Srrs printf("HUH? process_cookie_new: could not find INIT chunk!\n"); 1520163953Srrs } 1521163953Srrs#endif /* SCTP_DEBUG */ 1522163953Srrs return (NULL); 1523163953Srrs } 1524163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1525163953Srrs /* 1526163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1527163953Srrs * INIT-ACK follows the INIT chunk 1528163953Srrs */ 1529163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1530163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1531163953Srrs (uint8_t *) & initack_buf); 1532163953Srrs if (initack_cp == NULL) { 1533163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1534163953Srrs#ifdef SCTP_DEBUG 1535163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1536163953Srrs printf("process_cookie_new: could not pull INIT-ACK chunk hdr\n"); 1537163953Srrs } 1538163953Srrs#endif /* SCTP_DEBUG */ 1539163953Srrs return (NULL); 1540163953Srrs } 1541163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1542163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1543163953Srrs return (NULL); 1544163953Srrs } 1545163953Srrs /* 1546163953Srrs * NOTE: We can't use the INIT_ACK's chk_length to determine the 1547163953Srrs * "initack_limit" value. This is because the chk_length field 1548163953Srrs * includes the length of the cookie, but the cookie is omitted when 1549163953Srrs * the INIT and INIT_ACK are tacked onto the cookie... 1550163953Srrs */ 1551163953Srrs initack_limit = offset + cookie_len; 1552163953Srrs 1553163953Srrs /* 1554163953Srrs * now that we know the INIT/INIT-ACK are in place, create a new TCB 1555163953Srrs * and popluate 1556163953Srrs */ 1557163953Srrs stcb = sctp_aloc_assoc(inp, init_src, 0, &error, 1558163953Srrs ntohl(initack_cp->init.initiate_tag)); 1559163953Srrs if (stcb == NULL) { 1560163953Srrs struct mbuf *op_err; 1561163953Srrs 1562163953Srrs /* memory problem? */ 1563163953Srrs#ifdef SCTP_DEBUG 1564163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1565163953Srrs printf("process_cookie_new: no room for another TCB!\n"); 1566163953Srrs } 1567163953Srrs#endif /* SCTP_DEBUG */ 1568163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1569163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1570163953Srrs sh, op_err); 1571163953Srrs return (NULL); 1572163953Srrs } 1573163953Srrs /* get the correct sctp_nets */ 1574163953Srrs *netp = sctp_findnet(stcb, init_src); 1575163953Srrs asoc = &stcb->asoc; 1576163953Srrs /* get scope variables out of cookie */ 1577163953Srrs asoc->ipv4_local_scope = cookie->ipv4_scope; 1578163953Srrs asoc->site_scope = cookie->site_scope; 1579163953Srrs asoc->local_scope = cookie->local_scope; 1580163953Srrs asoc->loopback_scope = cookie->loopback_scope; 1581163953Srrs 1582163953Srrs if ((asoc->ipv4_addr_legal != cookie->ipv4_addr_legal) || 1583163953Srrs (asoc->ipv6_addr_legal != cookie->ipv6_addr_legal)) { 1584163953Srrs struct mbuf *op_err; 1585163953Srrs 1586163953Srrs /* 1587163953Srrs * Houston we have a problem. The EP changed while the 1588163953Srrs * cookie was in flight. Only recourse is to abort the 1589163953Srrs * association. 1590163953Srrs */ 1591163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1592163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1593163953Srrs sh, op_err); 1594163953Srrs return (NULL); 1595163953Srrs } 1596163953Srrs /* process the INIT-ACK info (my info) */ 1597163953Srrs old_tag = asoc->my_vtag; 1598163953Srrs asoc->assoc_id = asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1599163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1600163953Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1601163953Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1602163953Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1603163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1604163953Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1605163953Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1606163953Srrs 1607163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1608163953Srrs 1609163953Srrs /* process the INIT info (peer's info) */ 1610163953Srrs retval = sctp_process_init(init_cp, stcb, *netp); 1611163953Srrs if (retval < 0) { 1612165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16); 1613163953Srrs return (NULL); 1614163953Srrs } 1615163953Srrs /* load all addresses */ 1616163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1617163953Srrs init_offset + sizeof(struct sctp_init_chunk), initack_offset, sh, 1618163953Srrs init_src)) { 1619165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_17); 1620163953Srrs return (NULL); 1621163953Srrs } 1622163953Srrs /* 1623163953Srrs * verify any preceding AUTH chunk that was skipped 1624163953Srrs */ 1625163953Srrs /* pull the local authentication parameters from the cookie/init-ack */ 1626163953Srrs sctp_auth_get_cookie_params(stcb, m, 1627163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1628163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk))); 1629163953Srrs if (auth_skipped) { 1630163953Srrs struct sctp_auth_chunk *auth; 1631163953Srrs 1632163953Srrs auth = (struct sctp_auth_chunk *) 1633163953Srrs sctp_m_getptr(m, auth_offset, auth_len, chunk_buf); 1634163953Srrs if (sctp_handle_auth(stcb, auth, m, auth_offset)) { 1635163953Srrs /* auth HMAC failed, dump the assoc and packet */ 1636163953Srrs#ifdef SCTP_DEBUG 1637163953Srrs if (sctp_debug_on & SCTP_DEBUG_AUTH1) 1638163953Srrs printf("COOKIE-ECHO: AUTH failed\n"); 1639163953Srrs#endif /* SCTP_DEBUG */ 1640165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_18); 1641163953Srrs return (NULL); 1642163953Srrs } else { 1643163953Srrs /* remaining chunks checked... good to go */ 1644163953Srrs stcb->asoc.authenticated = 1; 1645163953Srrs } 1646163953Srrs } 1647163953Srrs /* update current state */ 1648163953Srrs#ifdef SCTP_DEBUG 1649163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1650163953Srrs printf("moving to OPEN state\n"); 1651163953Srrs } 1652163953Srrs#endif 1653163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1654163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1655163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1656163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1657163953Srrs } else { 1658163953Srrs asoc->state = SCTP_STATE_OPEN; 1659163953Srrs } 1660165220Srrs sctp_stop_all_cookie_timers(stcb); 1661163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_passiveestab); 1662163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1663163953Srrs 1664163953Srrs /* 1665163953Srrs * if we're doing ASCONFs, check to see if we have any new local 1666163953Srrs * addresses that need to get added to the peer (eg. addresses 1667163953Srrs * changed while cookie echo in flight). This needs to be done 1668163953Srrs * after we go to the OPEN state to do the correct asconf 1669163953Srrs * processing. else, make sure we have the correct addresses in our 1670163953Srrs * lists 1671163953Srrs */ 1672163953Srrs 1673163953Srrs /* warning, we re-use sin, sin6, sa_store here! */ 1674163953Srrs /* pull in local_address (our "from" address) */ 1675163953Srrs if (cookie->laddr_type == SCTP_IPV4_ADDRESS) { 1676163953Srrs /* source addr is IPv4 */ 1677163953Srrs sin = (struct sockaddr_in *)initack_src; 1678163953Srrs memset(sin, 0, sizeof(*sin)); 1679163953Srrs sin->sin_family = AF_INET; 1680163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 1681163953Srrs sin->sin_addr.s_addr = cookie->laddress[0]; 1682163953Srrs } else if (cookie->laddr_type == SCTP_IPV6_ADDRESS) { 1683163953Srrs /* source addr is IPv6 */ 1684163953Srrs sin6 = (struct sockaddr_in6 *)initack_src; 1685163953Srrs memset(sin6, 0, sizeof(*sin6)); 1686163953Srrs sin6->sin6_family = AF_INET6; 1687163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1688163953Srrs sin6->sin6_scope_id = cookie->scope_id; 1689163953Srrs memcpy(&sin6->sin6_addr, cookie->laddress, 1690163953Srrs sizeof(sin6->sin6_addr)); 1691163953Srrs } else { 1692165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_19); 1693163953Srrs return (NULL); 1694163953Srrs } 1695163953Srrs 1696163953Srrs sctp_check_address_list(stcb, m, 1697163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1698163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)), 1699163953Srrs initack_src, cookie->local_scope, cookie->site_scope, 1700163953Srrs cookie->ipv4_scope, cookie->loopback_scope); 1701163953Srrs 1702163953Srrs 1703163953Srrs /* set up to notify upper layer */ 1704163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1705163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1706163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1707163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1708163953Srrs /* 1709163953Srrs * This is an endpoint that called connect() how it got a 1710163953Srrs * cookie that is NEW is a bit of a mystery. It must be that 1711163953Srrs * the INIT was sent, but before it got there.. a complete 1712163953Srrs * INIT/INIT-ACK/COOKIE arrived. But of course then it 1713163953Srrs * should have went to the other code.. not here.. oh well.. 1714163953Srrs * a bit of protection is worth having.. 1715163953Srrs */ 1716163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1717163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1718163953Srrs } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 1719163953Srrs (inp->sctp_socket->so_qlimit)) { 1720163953Srrs /* 1721163953Srrs * We don't want to do anything with this one. Since it is 1722163953Srrs * the listening guy. The timer will get started for 1723163953Srrs * accepted connections in the caller. 1724163953Srrs */ 1725163953Srrs ; 1726163953Srrs } 1727163953Srrs /* since we did not send a HB make sure we don't double things */ 1728163953Srrs (*netp)->hb_responded = 1; 1729163953Srrs 1730163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1731163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1732163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL); 1733163953Srrs } 1734163953Srrs /* respond with a COOKIE-ACK */ 1735165220Srrs /* calculate the RTT */ 1736165220Srrs (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp, 1737165220Srrs &cookie->time_entered); 1738163953Srrs sctp_send_cookie_ack(stcb); 1739163953Srrs return (stcb); 1740163953Srrs} 1741163953Srrs 1742163953Srrs 1743163953Srrs/* 1744163953Srrs * handles a COOKIE-ECHO message stcb: modified to either a new or left as 1745163953Srrs * existing (non-NULL) TCB 1746163953Srrs */ 1747163953Srrsstatic struct mbuf * 1748163953Srrssctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset, 1749163953Srrs struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp, 1750163953Srrs struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp, 1751165220Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len, struct sctp_tcb **locked_tcb) 1752163953Srrs{ 1753163953Srrs struct sctp_state_cookie *cookie; 1754163953Srrs struct sockaddr_in6 sin6; 1755163953Srrs struct sockaddr_in sin; 1756163953Srrs struct sctp_tcb *l_stcb = *stcb; 1757163953Srrs struct sctp_inpcb *l_inp; 1758163953Srrs struct sockaddr *to; 1759163953Srrs sctp_assoc_t sac_restart_id; 1760163953Srrs struct sctp_pcb *ep; 1761163953Srrs struct mbuf *m_sig; 1762163953Srrs uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE]; 1763163953Srrs uint8_t *sig; 1764163953Srrs uint8_t cookie_ok = 0; 1765163953Srrs unsigned int size_of_pkt, sig_offset, cookie_offset; 1766163953Srrs unsigned int cookie_len; 1767163953Srrs struct timeval now; 1768163953Srrs struct timeval time_expires; 1769163953Srrs struct sockaddr_storage dest_store; 1770163953Srrs struct sockaddr *localep_sa = (struct sockaddr *)&dest_store; 1771163953Srrs struct ip *iph; 1772163953Srrs int notification = 0; 1773163953Srrs struct sctp_nets *netl; 1774163953Srrs int had_a_existing_tcb = 0; 1775163953Srrs 1776163953Srrs#ifdef SCTP_DEBUG 1777163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 1778163953Srrs printf("sctp_handle_cookie: handling COOKIE-ECHO\n"); 1779163953Srrs } 1780163953Srrs#endif 1781163953Srrs 1782163953Srrs if (inp_p == NULL) { 1783163953Srrs return (NULL); 1784163953Srrs } 1785163953Srrs /* First get the destination address setup too. */ 1786163953Srrs iph = mtod(m, struct ip *); 1787163953Srrs if (iph->ip_v == IPVERSION) { 1788163953Srrs /* its IPv4 */ 1789163953Srrs struct sockaddr_in *sin; 1790163953Srrs 1791163953Srrs sin = (struct sockaddr_in *)(localep_sa); 1792163953Srrs memset(sin, 0, sizeof(*sin)); 1793163953Srrs sin->sin_family = AF_INET; 1794163953Srrs sin->sin_len = sizeof(*sin); 1795163953Srrs sin->sin_port = sh->dest_port; 1796163953Srrs sin->sin_addr.s_addr = iph->ip_dst.s_addr; 1797165647Srrs size_of_pkt = SCTP_GET_IPV4_LENGTH(iph); 1798165647Srrs 1799163953Srrs } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1800163953Srrs /* its IPv6 */ 1801163953Srrs struct ip6_hdr *ip6; 1802163953Srrs struct sockaddr_in6 *sin6; 1803163953Srrs 1804163953Srrs sin6 = (struct sockaddr_in6 *)(localep_sa); 1805163953Srrs memset(sin6, 0, sizeof(*sin6)); 1806163953Srrs sin6->sin6_family = AF_INET6; 1807163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1808163953Srrs ip6 = mtod(m, struct ip6_hdr *); 1809163953Srrs sin6->sin6_port = sh->dest_port; 1810163953Srrs sin6->sin6_addr = ip6->ip6_dst; 1811165647Srrs size_of_pkt = SCTP_GET_IPV6_LENGTH(ip6); 1812163953Srrs } else { 1813163953Srrs return (NULL); 1814163953Srrs } 1815163953Srrs 1816163953Srrs cookie = &cp->cookie; 1817163953Srrs cookie_offset = offset + sizeof(struct sctp_chunkhdr); 1818163953Srrs cookie_len = ntohs(cp->ch.chunk_length); 1819163953Srrs 1820163953Srrs if ((cookie->peerport != sh->src_port) && 1821163953Srrs (cookie->myport != sh->dest_port) && 1822163953Srrs (cookie->my_vtag != sh->v_tag)) { 1823163953Srrs /* 1824163953Srrs * invalid ports or bad tag. Note that we always leave the 1825163953Srrs * v_tag in the header in network order and when we stored 1826163953Srrs * it in the my_vtag slot we also left it in network order. 1827163953Srrs * This maintians the match even though it may be in the 1828163953Srrs * opposite byte order of the machine :-> 1829163953Srrs */ 1830163953Srrs return (NULL); 1831163953Srrs } 1832163953Srrs if (cookie_len > size_of_pkt || 1833163953Srrs cookie_len < sizeof(struct sctp_cookie_echo_chunk) + 1834163953Srrs sizeof(struct sctp_init_chunk) + 1835163953Srrs sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) { 1836163953Srrs /* cookie too long! or too small */ 1837163953Srrs return (NULL); 1838163953Srrs } 1839163953Srrs /* 1840163953Srrs * split off the signature into its own mbuf (since it should not be 1841163953Srrs * calculated in the sctp_hmac_m() call). 1842163953Srrs */ 1843163953Srrs sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE; 1844163953Srrs if (sig_offset > size_of_pkt) { 1845163953Srrs /* packet not correct size! */ 1846163953Srrs /* XXX this may already be accounted for earlier... */ 1847163953Srrs return (NULL); 1848163953Srrs } 1849163953Srrs m_sig = m_split(m, sig_offset, M_DONTWAIT); 1850163953Srrs if (m_sig == NULL) { 1851163953Srrs /* out of memory or ?? */ 1852163953Srrs return (NULL); 1853163953Srrs } 1854163953Srrs /* 1855163953Srrs * compute the signature/digest for the cookie 1856163953Srrs */ 1857163953Srrs ep = &(*inp_p)->sctp_ep; 1858163953Srrs l_inp = *inp_p; 1859163953Srrs if (l_stcb) { 1860163953Srrs SCTP_TCB_UNLOCK(l_stcb); 1861163953Srrs } 1862163953Srrs SCTP_INP_RLOCK(l_inp); 1863163953Srrs if (l_stcb) { 1864163953Srrs SCTP_TCB_LOCK(l_stcb); 1865163953Srrs } 1866163953Srrs /* which cookie is it? */ 1867163953Srrs if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) && 1868163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1869163953Srrs /* it's the old cookie */ 1870163953Srrs sctp_hmac_m(SCTP_HMAC, 1871163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1872163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1873163953Srrs } else { 1874163953Srrs /* it's the current cookie */ 1875163953Srrs sctp_hmac_m(SCTP_HMAC, 1876163953Srrs (uint8_t *) ep->secret_key[(int)ep->current_secret_number], 1877163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1878163953Srrs } 1879163953Srrs /* get the signature */ 1880163953Srrs SCTP_INP_RUNLOCK(l_inp); 1881163953Srrs sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig); 1882163953Srrs if (sig == NULL) { 1883163953Srrs /* couldn't find signature */ 1884164085Srrs sctp_m_freem(m_sig); 1885163953Srrs return (NULL); 1886163953Srrs } 1887163953Srrs /* compare the received digest with the computed digest */ 1888163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) { 1889163953Srrs /* try the old cookie? */ 1890163953Srrs if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) && 1891163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1892163953Srrs /* compute digest with old */ 1893163953Srrs sctp_hmac_m(SCTP_HMAC, 1894163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1895163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1896163953Srrs /* compare */ 1897163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0) 1898163953Srrs cookie_ok = 1; 1899163953Srrs } 1900163953Srrs } else { 1901163953Srrs cookie_ok = 1; 1902163953Srrs } 1903163953Srrs 1904163953Srrs /* 1905163953Srrs * Now before we continue we must reconstruct our mbuf so that 1906163953Srrs * normal processing of any other chunks will work. 1907163953Srrs */ 1908163953Srrs { 1909163953Srrs struct mbuf *m_at; 1910163953Srrs 1911163953Srrs m_at = m; 1912165647Srrs while (SCTP_BUF_NEXT(m_at) != NULL) { 1913165647Srrs m_at = SCTP_BUF_NEXT(m_at); 1914163953Srrs } 1915165647Srrs SCTP_BUF_NEXT(m_at) = m_sig; 1916163953Srrs } 1917163953Srrs 1918163953Srrs if (cookie_ok == 0) { 1919163953Srrs#ifdef SCTP_DEBUG 1920163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 1921163953Srrs printf("handle_cookie_echo: cookie signature validation failed!\n"); 1922163953Srrs printf("offset = %u, cookie_offset = %u, sig_offset = %u\n", 1923163953Srrs (uint32_t) offset, cookie_offset, sig_offset); 1924163953Srrs } 1925163953Srrs#endif 1926163953Srrs return (NULL); 1927163953Srrs } 1928163953Srrs /* 1929163953Srrs * check the cookie timestamps to be sure it's not stale 1930163953Srrs */ 1931163953Srrs SCTP_GETTIME_TIMEVAL(&now); 1932163953Srrs /* Expire time is in Ticks, so we convert to seconds */ 1933163953Srrs time_expires.tv_sec = cookie->time_entered.tv_sec + cookie->cookie_life; 1934163953Srrs time_expires.tv_usec = cookie->time_entered.tv_usec; 1935163953Srrs if (timevalcmp(&now, &time_expires, >)) { 1936163953Srrs /* cookie is stale! */ 1937163953Srrs struct mbuf *op_err; 1938163953Srrs struct sctp_stale_cookie_msg *scm; 1939163953Srrs uint32_t tim; 1940163953Srrs 1941163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_stale_cookie_msg), 1942165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 1943163953Srrs if (op_err == NULL) { 1944163953Srrs /* FOOBAR */ 1945163953Srrs return (NULL); 1946163953Srrs } 1947163953Srrs /* pre-reserve some space */ 1948165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 1949165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 1950165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 1951163953Srrs 1952163953Srrs /* Set the len */ 1953165647Srrs SCTP_BUF_LEN(op_err) = sizeof(struct sctp_stale_cookie_msg); 1954163953Srrs scm = mtod(op_err, struct sctp_stale_cookie_msg *); 1955163953Srrs scm->ph.param_type = htons(SCTP_CAUSE_STALE_COOKIE); 1956163953Srrs scm->ph.param_length = htons((sizeof(struct sctp_paramhdr) + 1957163953Srrs (sizeof(uint32_t)))); 1958163953Srrs /* seconds to usec */ 1959163953Srrs tim = (now.tv_sec - time_expires.tv_sec) * 1000000; 1960163953Srrs /* add in usec */ 1961163953Srrs if (tim == 0) 1962163953Srrs tim = now.tv_usec - cookie->time_entered.tv_usec; 1963163953Srrs scm->time_usec = htonl(tim); 1964163953Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag); 1965163953Srrs return (NULL); 1966163953Srrs } 1967163953Srrs /* 1968163953Srrs * Now we must see with the lookup address if we have an existing 1969163953Srrs * asoc. This will only happen if we were in the COOKIE-WAIT state 1970163953Srrs * and a INIT collided with us and somewhere the peer sent the 1971163953Srrs * cookie on another address besides the single address our assoc 1972163953Srrs * had for him. In this case we will have one of the tie-tags set at 1973163953Srrs * least AND the address field in the cookie can be used to look it 1974163953Srrs * up. 1975163953Srrs */ 1976163953Srrs to = NULL; 1977163953Srrs if (cookie->addr_type == SCTP_IPV6_ADDRESS) { 1978163953Srrs memset(&sin6, 0, sizeof(sin6)); 1979163953Srrs sin6.sin6_family = AF_INET6; 1980163953Srrs sin6.sin6_len = sizeof(sin6); 1981163953Srrs sin6.sin6_port = sh->src_port; 1982163953Srrs sin6.sin6_scope_id = cookie->scope_id; 1983163953Srrs memcpy(&sin6.sin6_addr.s6_addr, cookie->address, 1984163953Srrs sizeof(sin6.sin6_addr.s6_addr)); 1985163953Srrs to = (struct sockaddr *)&sin6; 1986163953Srrs } else if (cookie->addr_type == SCTP_IPV4_ADDRESS) { 1987163953Srrs memset(&sin, 0, sizeof(sin)); 1988163953Srrs sin.sin_family = AF_INET; 1989163953Srrs sin.sin_len = sizeof(sin); 1990163953Srrs sin.sin_port = sh->src_port; 1991163953Srrs sin.sin_addr.s_addr = cookie->address[0]; 1992163953Srrs to = (struct sockaddr *)&sin; 1993163953Srrs } 1994163953Srrs if ((*stcb == NULL) && to) { 1995163953Srrs /* Yep, lets check */ 1996163953Srrs *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, localep_sa, NULL); 1997163953Srrs if (*stcb == NULL) { 1998163953Srrs /* 1999163953Srrs * We should have only got back the same inp. If we 2000163953Srrs * got back a different ep we have a problem. The 2001163953Srrs * original findep got back l_inp and now 2002163953Srrs */ 2003163953Srrs if (l_inp != *inp_p) { 2004163953Srrs printf("Bad problem find_ep got a diff inp then special_locate?\n"); 2005163953Srrs } 2006165220Srrs } else { 2007165220Srrs if (*locked_tcb == NULL) { 2008165220Srrs /* 2009165220Srrs * In this case we found the assoc only 2010165220Srrs * after we locked the create lock. This 2011165220Srrs * means we are in a colliding case and we 2012165220Srrs * must make sure that we unlock the tcb if 2013165220Srrs * its one of the cases where we throw away 2014165220Srrs * the incoming packets. 2015165220Srrs */ 2016165220Srrs *locked_tcb = *stcb; 2017165220Srrs 2018165220Srrs /* 2019165220Srrs * We must also increment the inp ref count 2020165220Srrs * since the ref_count flags was set when we 2021165220Srrs * did not find the TCB, now we found it 2022165220Srrs * which reduces the refcount.. we must 2023165220Srrs * raise it back out to balance it all :-) 2024165220Srrs */ 2025165220Srrs SCTP_INP_INCR_REF((*stcb)->sctp_ep); 2026165220Srrs if ((*stcb)->sctp_ep != l_inp) { 2027165220Srrs printf("Huh? ep:%p diff then l_inp:%p?\n", 2028165220Srrs (*stcb)->sctp_ep, l_inp); 2029165220Srrs } 2030165220Srrs } 2031163953Srrs } 2032163953Srrs } 2033163953Srrs cookie_len -= SCTP_SIGNATURE_SIZE; 2034163953Srrs if (*stcb == NULL) { 2035163953Srrs /* this is the "normal" case... get a new TCB */ 2036163953Srrs *stcb = sctp_process_cookie_new(m, iphlen, offset, sh, cookie, 2037163953Srrs cookie_len, *inp_p, netp, to, ¬ification, 2038163953Srrs auth_skipped, auth_offset, auth_len); 2039163953Srrs } else { 2040163953Srrs /* this is abnormal... cookie-echo on existing TCB */ 2041163953Srrs had_a_existing_tcb = 1; 2042163953Srrs *stcb = sctp_process_cookie_existing(m, iphlen, offset, sh, 2043163953Srrs cookie, cookie_len, *inp_p, *stcb, *netp, to, ¬ification, 2044163953Srrs &sac_restart_id); 2045163953Srrs } 2046163953Srrs 2047163953Srrs if (*stcb == NULL) { 2048163953Srrs /* still no TCB... must be bad cookie-echo */ 2049163953Srrs return (NULL); 2050163953Srrs } 2051163953Srrs /* 2052163953Srrs * Ok, we built an association so confirm the address we sent the 2053163953Srrs * INIT-ACK to. 2054163953Srrs */ 2055163953Srrs netl = sctp_findnet(*stcb, to); 2056163953Srrs /* 2057163953Srrs * This code should in theory NOT run but 2058163953Srrs */ 2059163953Srrs if (netl == NULL) { 2060163953Srrs /* TSNH! Huh, why do I need to add this address here? */ 2061163953Srrs int ret; 2062163953Srrs 2063165220Srrs ret = sctp_add_remote_addr(*stcb, to, SCTP_DONOT_SETSCOPE, 2064165220Srrs SCTP_IN_COOKIE_PROC); 2065163953Srrs netl = sctp_findnet(*stcb, to); 2066163953Srrs } 2067163953Srrs if (netl) { 2068163953Srrs if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) { 2069163953Srrs netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 2070163953Srrs sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL, 2071163953Srrs netl); 2072163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 2073163953Srrs (*stcb), 0, (void *)netl); 2074163953Srrs } 2075163953Srrs } 2076163953Srrs if (*stcb) { 2077163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, *inp_p, 2078163953Srrs *stcb, NULL); 2079163953Srrs } 2080163953Srrs if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 2081163953Srrs if (!had_a_existing_tcb || 2082163953Srrs (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 2083163953Srrs /* 2084163953Srrs * If we have a NEW cookie or the connect never 2085163953Srrs * reached the connected state during collision we 2086163953Srrs * must do the TCP accept thing. 2087163953Srrs */ 2088163953Srrs struct socket *so, *oso; 2089163953Srrs struct sctp_inpcb *inp; 2090163953Srrs 2091163953Srrs if (notification == SCTP_NOTIFY_ASSOC_RESTART) { 2092163953Srrs /* 2093163953Srrs * For a restart we will keep the same 2094163953Srrs * socket, no need to do anything. I THINK!! 2095163953Srrs */ 2096163953Srrs sctp_ulp_notify(notification, *stcb, 0, (void *)&sac_restart_id); 2097163953Srrs return (m); 2098163953Srrs } 2099163953Srrs oso = (*inp_p)->sctp_socket; 2100163953Srrs /* 2101163953Srrs * We do this to keep the sockets side happy durin 2102163953Srrs * the sonewcon ONLY. 2103163953Srrs */ 2104163953Srrs NET_LOCK_GIANT(); 2105163953Srrs SCTP_TCB_UNLOCK((*stcb)); 2106163953Srrs so = sonewconn(oso, SS_ISCONNECTED 2107163953Srrs ); 2108163953Srrs NET_UNLOCK_GIANT(); 2109163953Srrs SCTP_INP_WLOCK((*stcb)->sctp_ep); 2110163953Srrs SCTP_TCB_LOCK((*stcb)); 2111163953Srrs SCTP_INP_WUNLOCK((*stcb)->sctp_ep); 2112163953Srrs if (so == NULL) { 2113163953Srrs struct mbuf *op_err; 2114163953Srrs 2115163953Srrs /* Too many sockets */ 2116163953Srrs#ifdef SCTP_DEBUG 2117163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 2118163953Srrs printf("process_cookie_new: no room for another socket!\n"); 2119163953Srrs } 2120163953Srrs#endif /* SCTP_DEBUG */ 2121163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 2122163953Srrs sctp_abort_association(*inp_p, NULL, m, iphlen, 2123163953Srrs sh, op_err); 2124165220Srrs sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_20); 2125163953Srrs return (NULL); 2126163953Srrs } 2127163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 2128163953Srrs inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2129163953Srrs SCTP_PCB_FLAGS_CONNECTED | 2130163953Srrs SCTP_PCB_FLAGS_IN_TCPPOOL | 2131163953Srrs (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) | 2132163953Srrs SCTP_PCB_FLAGS_DONT_WAKE); 2133163953Srrs inp->sctp_features = (*inp_p)->sctp_features; 2134163953Srrs inp->sctp_socket = so; 2135163953Srrs inp->sctp_frag_point = (*inp_p)->sctp_frag_point; 2136163953Srrs inp->partial_delivery_point = (*inp_p)->partial_delivery_point; 2137163953Srrs inp->sctp_context = (*inp_p)->sctp_context; 2138163953Srrs inp->inp_starting_point_for_iterator = NULL; 2139163953Srrs /* 2140163953Srrs * copy in the authentication parameters from the 2141163953Srrs * original endpoint 2142163953Srrs */ 2143163953Srrs if (inp->sctp_ep.local_hmacs) 2144163953Srrs sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2145163953Srrs inp->sctp_ep.local_hmacs = 2146163953Srrs sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs); 2147163953Srrs if (inp->sctp_ep.local_auth_chunks) 2148163953Srrs sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2149163953Srrs inp->sctp_ep.local_auth_chunks = 2150163953Srrs sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks); 2151163953Srrs (void)sctp_copy_skeylist(&(*inp_p)->sctp_ep.shared_keys, 2152163953Srrs &inp->sctp_ep.shared_keys); 2153163953Srrs 2154163953Srrs /* 2155163953Srrs * Now we must move it from one hash table to 2156163953Srrs * another and get the tcb in the right place. 2157163953Srrs */ 2158163953Srrs sctp_move_pcb_and_assoc(*inp_p, inp, *stcb); 2159163953Srrs 2160163953Srrs sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb); 2161163953Srrs 2162163953Srrs /* Switch over to the new guy */ 2163163953Srrs *inp_p = inp; 2164163953Srrs 2165163953Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2166163953Srrs return (m); 2167163953Srrs } 2168163953Srrs } 2169163953Srrs if ((notification) && ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) { 2170163953Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2171163953Srrs } 2172163953Srrs return (m); 2173163953Srrs} 2174163953Srrs 2175163953Srrsstatic void 2176163953Srrssctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp, 2177163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2178163953Srrs{ 2179163953Srrs /* cp must not be used, others call this without a c-ack :-) */ 2180163953Srrs struct sctp_association *asoc; 2181163953Srrs 2182163953Srrs#ifdef SCTP_DEBUG 2183163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2184163953Srrs printf("sctp_handle_cookie_ack: handling COOKIE-ACK\n"); 2185163953Srrs } 2186163953Srrs#endif 2187163953Srrs if (stcb == NULL) 2188163953Srrs return; 2189163953Srrs 2190163953Srrs asoc = &stcb->asoc; 2191163953Srrs 2192163953Srrs sctp_stop_all_cookie_timers(stcb); 2193163953Srrs /* process according to association state */ 2194163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 2195163953Srrs /* state change only needed when I am in right state */ 2196163953Srrs#ifdef SCTP_DEBUG 2197163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2198163953Srrs printf("moving to OPEN state\n"); 2199163953Srrs } 2200163953Srrs#endif 2201163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 2202163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 2203163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 2204163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 2205163953Srrs 2206163953Srrs } else { 2207163953Srrs asoc->state = SCTP_STATE_OPEN; 2208163953Srrs } 2209163953Srrs /* update RTO */ 2210163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 2211163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 2212163953Srrs if (asoc->overall_error_count == 0) { 2213163953Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, 2214163953Srrs &asoc->time_entered); 2215163953Srrs } 2216163953Srrs SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 2217163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL); 2218163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 2219163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 2220163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 2221163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 2222163953Srrs } 2223163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 2224163953Srrs stcb, net); 2225163953Srrs /* 2226163953Srrs * since we did not send a HB make sure we don't double 2227163953Srrs * things 2228163953Srrs */ 2229163953Srrs net->hb_responded = 1; 2230163953Srrs 2231163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 2232163953Srrs sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) { 2233163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 2234163953Srrs stcb->sctp_ep, stcb, NULL); 2235163953Srrs } 2236163953Srrs /* 2237163953Srrs * set ASCONF timer if ASCONFs are pending and allowed (eg. 2238163953Srrs * addresses changed when init/cookie echo in flight) 2239163953Srrs */ 2240163953Srrs if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) && 2241163953Srrs (stcb->asoc.peer_supports_asconf) && 2242163953Srrs (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) { 2243163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2244163953Srrs stcb->sctp_ep, stcb, 2245163953Srrs stcb->asoc.primary_destination); 2246163953Srrs } 2247163953Srrs } 2248163953Srrs /* Toss the cookie if I can */ 2249163953Srrs sctp_toss_old_cookies(stcb, asoc); 2250163953Srrs if (!TAILQ_EMPTY(&asoc->sent_queue)) { 2251163953Srrs /* Restart the timer if we have pending data */ 2252163953Srrs struct sctp_tmit_chunk *chk; 2253163953Srrs 2254163953Srrs chk = TAILQ_FIRST(&asoc->sent_queue); 2255163953Srrs if (chk) { 2256163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2257163953Srrs stcb, chk->whoTo); 2258163953Srrs } 2259163953Srrs } 2260163953Srrs} 2261163953Srrs 2262163953Srrsstatic void 2263163953Srrssctp_handle_ecn_echo(struct sctp_ecne_chunk *cp, 2264163953Srrs struct sctp_tcb *stcb) 2265163953Srrs{ 2266163953Srrs struct sctp_nets *net; 2267163953Srrs struct sctp_tmit_chunk *lchk; 2268163953Srrs uint32_t tsn; 2269163953Srrs 2270163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_ecne_chunk)) { 2271163953Srrs return; 2272163953Srrs } 2273163953Srrs SCTP_STAT_INCR(sctps_recvecne); 2274163953Srrs tsn = ntohl(cp->tsn); 2275163953Srrs /* ECN Nonce stuff: need a resync and disable the nonce sum check */ 2276163953Srrs /* Also we make sure we disable the nonce_wait */ 2277163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.send_queue); 2278163953Srrs if (lchk == NULL) { 2279163953Srrs stcb->asoc.nonce_resync_tsn = stcb->asoc.sending_seq; 2280163953Srrs } else { 2281163953Srrs stcb->asoc.nonce_resync_tsn = lchk->rec.data.TSN_seq; 2282163953Srrs } 2283163953Srrs stcb->asoc.nonce_wait_for_ecne = 0; 2284163953Srrs stcb->asoc.nonce_sum_check = 0; 2285163953Srrs 2286163953Srrs /* Find where it was sent, if possible */ 2287163953Srrs net = NULL; 2288163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.sent_queue); 2289163953Srrs while (lchk) { 2290163953Srrs if (lchk->rec.data.TSN_seq == tsn) { 2291163953Srrs net = lchk->whoTo; 2292163953Srrs break; 2293163953Srrs } 2294163953Srrs if (compare_with_wrap(lchk->rec.data.TSN_seq, tsn, MAX_SEQ)) 2295163953Srrs break; 2296163953Srrs lchk = TAILQ_NEXT(lchk, sctp_next); 2297163953Srrs } 2298163953Srrs if (net == NULL) 2299163953Srrs /* default is we use the primary */ 2300163953Srrs net = stcb->asoc.primary_destination; 2301163953Srrs 2302163953Srrs if (compare_with_wrap(tsn, stcb->asoc.last_cwr_tsn, MAX_TSN)) { 2303163953Srrs#ifdef SCTP_CWND_MONITOR 2304163953Srrs int old_cwnd; 2305163953Srrs 2306163953Srrs old_cwnd = net->cwnd; 2307163953Srrs#endif 2308163953Srrs SCTP_STAT_INCR(sctps_ecnereducedcwnd); 2309163953Srrs net->ssthresh = net->cwnd / 2; 2310163953Srrs if (net->ssthresh < net->mtu) { 2311163953Srrs net->ssthresh = net->mtu; 2312163953Srrs /* here back off the timer as well, to slow us down */ 2313163953Srrs net->RTO <<= 2; 2314163953Srrs } 2315163953Srrs net->cwnd = net->ssthresh; 2316163953Srrs#ifdef SCTP_CWND_MONITOR 2317163953Srrs sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_SAT); 2318163953Srrs#endif 2319163953Srrs /* 2320163953Srrs * we reduce once every RTT. So we will only lower cwnd at 2321163953Srrs * the next sending seq i.e. the resync_tsn. 2322163953Srrs */ 2323163953Srrs stcb->asoc.last_cwr_tsn = stcb->asoc.nonce_resync_tsn; 2324163953Srrs } 2325163953Srrs /* 2326163953Srrs * We always send a CWR this way if our previous one was lost our 2327163953Srrs * peer will get an update, or if it is not time again to reduce we 2328163953Srrs * still get the cwr to the peer. 2329163953Srrs */ 2330163953Srrs sctp_send_cwr(stcb, net, tsn); 2331163953Srrs} 2332163953Srrs 2333163953Srrsstatic void 2334163953Srrssctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb) 2335163953Srrs{ 2336163953Srrs /* 2337163953Srrs * Here we get a CWR from the peer. We must look in the outqueue and 2338163953Srrs * make sure that we have a covered ECNE in teh control chunk part. 2339163953Srrs * If so remove it. 2340163953Srrs */ 2341163953Srrs struct sctp_tmit_chunk *chk; 2342163953Srrs struct sctp_ecne_chunk *ecne; 2343163953Srrs 2344163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 2345163953Srrs if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) { 2346163953Srrs continue; 2347163953Srrs } 2348163953Srrs /* 2349163953Srrs * Look for and remove if it is the right TSN. Since there 2350163953Srrs * is only ONE ECNE on the control queue at any one time we 2351163953Srrs * don't need to worry about more than one! 2352163953Srrs */ 2353163953Srrs ecne = mtod(chk->data, struct sctp_ecne_chunk *); 2354163953Srrs if (compare_with_wrap(ntohl(cp->tsn), ntohl(ecne->tsn), 2355163953Srrs MAX_TSN) || (cp->tsn == ecne->tsn)) { 2356163953Srrs /* this covers this ECNE, we can remove it */ 2357163953Srrs stcb->asoc.ecn_echo_cnt_onq--; 2358163953Srrs TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, 2359163953Srrs sctp_next); 2360163953Srrs if (chk->data) { 2361163953Srrs sctp_m_freem(chk->data); 2362163953Srrs chk->data = NULL; 2363163953Srrs } 2364163953Srrs stcb->asoc.ctrl_queue_cnt--; 2365163953Srrs sctp_free_remote_addr(chk->whoTo); 2366163953Srrs sctp_free_a_chunk(stcb, chk); 2367163953Srrs break; 2368163953Srrs } 2369163953Srrs } 2370163953Srrs} 2371163953Srrs 2372163953Srrsstatic void 2373163953Srrssctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp, 2374163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2375163953Srrs{ 2376163953Srrs struct sctp_association *asoc; 2377163953Srrs 2378163953Srrs#ifdef SCTP_DEBUG 2379163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2380163953Srrs printf("sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n"); 2381163953Srrs } 2382163953Srrs#endif 2383163953Srrs if (stcb == NULL) 2384163953Srrs return; 2385163953Srrs 2386163953Srrs asoc = &stcb->asoc; 2387163953Srrs /* process according to association state */ 2388163953Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) { 2389163953Srrs /* unexpected SHUTDOWN-COMPLETE... so ignore... */ 2390163953Srrs SCTP_TCB_UNLOCK(stcb); 2391163953Srrs return; 2392163953Srrs } 2393163953Srrs /* notify upper layer protocol */ 2394163953Srrs if (stcb->sctp_socket) { 2395163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 2396163953Srrs /* are the queues empty? they should be */ 2397163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 2398163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 2399163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 2400164205Srrs sctp_report_all_outbound(stcb, 0); 2401163953Srrs } 2402163953Srrs } 2403163953Srrs /* stop the timer */ 2404165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_21); 2405163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 2406163953Srrs /* free the TCB */ 2407165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_22); 2408163953Srrs return; 2409163953Srrs} 2410163953Srrs 2411163953Srrsstatic int 2412163953Srrsprocess_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc, 2413163953Srrs struct sctp_nets *net, uint8_t flg) 2414163953Srrs{ 2415163953Srrs switch (desc->chunk_type) { 2416163953Srrs case SCTP_DATA: 2417163953Srrs /* find the tsn to resend (possibly */ 2418163953Srrs { 2419163953Srrs uint32_t tsn; 2420163953Srrs struct sctp_tmit_chunk *tp1; 2421163953Srrs 2422163953Srrs tsn = ntohl(desc->tsn_ifany); 2423163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2424163953Srrs while (tp1) { 2425163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2426163953Srrs /* found it */ 2427163953Srrs break; 2428163953Srrs } 2429163953Srrs if (compare_with_wrap(tp1->rec.data.TSN_seq, tsn, 2430163953Srrs MAX_TSN)) { 2431163953Srrs /* not found */ 2432163953Srrs tp1 = NULL; 2433163953Srrs break; 2434163953Srrs } 2435163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2436163953Srrs } 2437163953Srrs if (tp1 == NULL) { 2438163953Srrs /* 2439163953Srrs * Do it the other way , aka without paying 2440163953Srrs * attention to queue seq order. 2441163953Srrs */ 2442163953Srrs SCTP_STAT_INCR(sctps_pdrpdnfnd); 2443163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2444163953Srrs while (tp1) { 2445163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2446163953Srrs /* found it */ 2447163953Srrs break; 2448163953Srrs } 2449163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2450163953Srrs } 2451163953Srrs } 2452163953Srrs if (tp1 == NULL) { 2453163953Srrs SCTP_STAT_INCR(sctps_pdrptsnnf); 2454163953Srrs } 2455163953Srrs if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) { 2456163953Srrs uint8_t *ddp; 2457163953Srrs 2458163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 2459163953Srrs ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) { 2460163953Srrs SCTP_STAT_INCR(sctps_pdrpdiwnp); 2461163953Srrs return (0); 2462163953Srrs } 2463163953Srrs if (stcb->asoc.peers_rwnd == 0 && 2464163953Srrs (flg & SCTP_FROM_MIDDLE_BOX)) { 2465163953Srrs SCTP_STAT_INCR(sctps_pdrpdizrw); 2466163953Srrs return (0); 2467163953Srrs } 2468163953Srrs ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+ 2469163953Srrs sizeof(struct sctp_data_chunk)); 2470163953Srrs { 2471163953Srrs unsigned int iii; 2472163953Srrs 2473163953Srrs for (iii = 0; iii < sizeof(desc->data_bytes); 2474163953Srrs iii++) { 2475163953Srrs if (ddp[iii] != desc->data_bytes[iii]) { 2476163953Srrs SCTP_STAT_INCR(sctps_pdrpbadd); 2477163953Srrs return (-1); 2478163953Srrs } 2479163953Srrs } 2480163953Srrs } 2481163953Srrs /* 2482163953Srrs * We zero out the nonce so resync not 2483163953Srrs * needed 2484163953Srrs */ 2485163953Srrs tp1->rec.data.ect_nonce = 0; 2486163953Srrs 2487163953Srrs if (tp1->do_rtt) { 2488163953Srrs /* 2489163953Srrs * this guy had a RTO calculation 2490163953Srrs * pending on it, cancel it 2491163953Srrs */ 2492163953Srrs tp1->whoTo->rto_pending = 0; 2493163953Srrs tp1->do_rtt = 0; 2494163953Srrs } 2495163953Srrs SCTP_STAT_INCR(sctps_pdrpmark); 2496163953Srrs if (tp1->sent != SCTP_DATAGRAM_RESEND) 2497163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2498163953Srrs tp1->sent = SCTP_DATAGRAM_RESEND; 2499163953Srrs /* 2500163953Srrs * mark it as if we were doing a FR, since 2501163953Srrs * we will be getting gap ack reports behind 2502163953Srrs * the info from the router. 2503163953Srrs */ 2504163953Srrs tp1->rec.data.doing_fast_retransmit = 1; 2505163953Srrs /* 2506163953Srrs * mark the tsn with what sequences can 2507163953Srrs * cause a new FR. 2508163953Srrs */ 2509163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 2510163953Srrs tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 2511163953Srrs } else { 2512163953Srrs tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 2513163953Srrs } 2514163953Srrs 2515163953Srrs /* restart the timer */ 2516163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2517165220Srrs stcb, tp1->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_23); 2518163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2519163953Srrs stcb, tp1->whoTo); 2520163953Srrs 2521163953Srrs /* fix counts and things */ 2522165220Srrs#ifdef SCTP_FLIGHT_LOGGING 2523165220Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN, 2524165220Srrs tp1->whoTo->flight_size, 2525165220Srrs tp1->book_size, 2526165220Srrs (uintptr_t) stcb, 2527165220Srrs tp1->rec.data.TSN_seq); 2528165220Srrs#endif 2529163953Srrs if (tp1->whoTo->flight_size >= tp1->book_size) 2530163953Srrs tp1->whoTo->flight_size -= tp1->book_size; 2531163953Srrs else 2532163953Srrs tp1->whoTo->flight_size = 0; 2533163953Srrs 2534163953Srrs if (stcb->asoc.total_flight >= tp1->book_size) { 2535163953Srrs stcb->asoc.total_flight -= tp1->book_size; 2536163953Srrs if (stcb->asoc.total_flight_count > 0) 2537163953Srrs stcb->asoc.total_flight_count--; 2538163953Srrs } else { 2539163953Srrs stcb->asoc.total_flight = 0; 2540163953Srrs stcb->asoc.total_flight_count = 0; 2541163953Srrs } 2542163953Srrs tp1->snd_count--; 2543163953Srrs } { 2544163953Srrs /* audit code */ 2545163953Srrs unsigned int audit; 2546163953Srrs 2547163953Srrs audit = 0; 2548163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) { 2549163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2550163953Srrs audit++; 2551163953Srrs } 2552163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue, 2553163953Srrs sctp_next) { 2554163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2555163953Srrs audit++; 2556163953Srrs } 2557163953Srrs if (audit != stcb->asoc.sent_queue_retran_cnt) { 2558163953Srrs printf("**Local Audit finds cnt:%d asoc cnt:%d\n", 2559163953Srrs audit, stcb->asoc.sent_queue_retran_cnt); 2560163953Srrs#ifndef SCTP_AUDITING_ENABLED 2561163953Srrs stcb->asoc.sent_queue_retran_cnt = audit; 2562163953Srrs#endif 2563163953Srrs } 2564163953Srrs } 2565163953Srrs } 2566163953Srrs break; 2567163953Srrs case SCTP_ASCONF: 2568163953Srrs { 2569163953Srrs struct sctp_tmit_chunk *asconf; 2570163953Srrs 2571163953Srrs TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue, 2572163953Srrs sctp_next) { 2573163953Srrs if (asconf->rec.chunk_id.id == SCTP_ASCONF) { 2574163953Srrs break; 2575163953Srrs } 2576163953Srrs } 2577163953Srrs if (asconf) { 2578163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 2579163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2580163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 2581163953Srrs asconf->snd_count--; 2582163953Srrs } 2583163953Srrs } 2584163953Srrs break; 2585163953Srrs case SCTP_INITIATION: 2586163953Srrs /* resend the INIT */ 2587163953Srrs stcb->asoc.dropped_special_cnt++; 2588163953Srrs if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) { 2589163953Srrs /* 2590163953Srrs * If we can get it in, in a few attempts we do 2591163953Srrs * this, otherwise we let the timer fire. 2592163953Srrs */ 2593163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, 2594165220Srrs stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_24); 2595163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 2596163953Srrs } 2597163953Srrs break; 2598163953Srrs case SCTP_SELECTIVE_ACK: 2599163953Srrs /* resend the sack */ 2600163953Srrs sctp_send_sack(stcb); 2601163953Srrs break; 2602163953Srrs case SCTP_HEARTBEAT_REQUEST: 2603163953Srrs /* resend a demand HB */ 2604163953Srrs sctp_send_hb(stcb, 1, net); 2605163953Srrs break; 2606163953Srrs case SCTP_SHUTDOWN: 2607163953Srrs sctp_send_shutdown(stcb, net); 2608163953Srrs break; 2609163953Srrs case SCTP_SHUTDOWN_ACK: 2610163953Srrs sctp_send_shutdown_ack(stcb, net); 2611163953Srrs break; 2612163953Srrs case SCTP_COOKIE_ECHO: 2613163953Srrs { 2614163953Srrs struct sctp_tmit_chunk *cookie; 2615163953Srrs 2616163953Srrs cookie = NULL; 2617163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, 2618163953Srrs sctp_next) { 2619163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 2620163953Srrs break; 2621163953Srrs } 2622163953Srrs } 2623163953Srrs if (cookie) { 2624163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) 2625163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2626163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 2627163953Srrs sctp_stop_all_cookie_timers(stcb); 2628163953Srrs } 2629163953Srrs } 2630163953Srrs break; 2631163953Srrs case SCTP_COOKIE_ACK: 2632163953Srrs sctp_send_cookie_ack(stcb); 2633163953Srrs break; 2634163953Srrs case SCTP_ASCONF_ACK: 2635163953Srrs /* resend last asconf ack */ 2636163953Srrs sctp_send_asconf_ack(stcb, 1); 2637163953Srrs break; 2638163953Srrs case SCTP_FORWARD_CUM_TSN: 2639163953Srrs send_forward_tsn(stcb, &stcb->asoc); 2640163953Srrs break; 2641163953Srrs /* can't do anything with these */ 2642163953Srrs case SCTP_PACKET_DROPPED: 2643163953Srrs case SCTP_INITIATION_ACK: /* this should not happen */ 2644163953Srrs case SCTP_HEARTBEAT_ACK: 2645163953Srrs case SCTP_ABORT_ASSOCIATION: 2646163953Srrs case SCTP_OPERATION_ERROR: 2647163953Srrs case SCTP_SHUTDOWN_COMPLETE: 2648163953Srrs case SCTP_ECN_ECHO: 2649163953Srrs case SCTP_ECN_CWR: 2650163953Srrs default: 2651163953Srrs break; 2652163953Srrs } 2653163953Srrs return (0); 2654163953Srrs} 2655163953Srrs 2656163953Srrsvoid 2657163953Srrssctp_reset_in_stream(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2658163953Srrs{ 2659163953Srrs int i; 2660163953Srrs uint16_t temp; 2661163953Srrs 2662163953Srrs /* 2663163953Srrs * We set things to 0xffff since this is the last delivered sequence 2664163953Srrs * and we will be sending in 0 after the reset. 2665163953Srrs */ 2666163953Srrs 2667163953Srrs if (number_entries) { 2668163953Srrs for (i = 0; i < number_entries; i++) { 2669163953Srrs temp = ntohs(list[i]); 2670163953Srrs if (temp >= stcb->asoc.streamincnt) { 2671163953Srrs continue; 2672163953Srrs } 2673163953Srrs stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff; 2674163953Srrs } 2675163953Srrs } else { 2676163953Srrs list = NULL; 2677163953Srrs for (i = 0; i < stcb->asoc.streamincnt; i++) { 2678163953Srrs stcb->asoc.strmin[i].last_sequence_delivered = 0xffff; 2679163953Srrs } 2680163953Srrs } 2681163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list); 2682163953Srrs} 2683163953Srrs 2684163953Srrsstatic void 2685163953Srrssctp_reset_out_streams(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2686163953Srrs{ 2687163953Srrs int i; 2688163953Srrs 2689163953Srrs if (number_entries == 0) { 2690163953Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 2691163953Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 2692163953Srrs } 2693163953Srrs } else if (number_entries) { 2694163953Srrs for (i = 0; i < number_entries; i++) { 2695163953Srrs uint16_t temp; 2696163953Srrs 2697163953Srrs temp = ntohs(list[i]); 2698163953Srrs if (temp >= stcb->asoc.streamoutcnt) { 2699163953Srrs /* no such stream */ 2700163953Srrs continue; 2701163953Srrs } 2702163953Srrs stcb->asoc.strmout[temp].next_sequence_sent = 0; 2703163953Srrs } 2704163953Srrs } 2705163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list); 2706163953Srrs} 2707163953Srrs 2708163953Srrs 2709163953Srrsstruct sctp_stream_reset_out_request * 2710163953Srrssctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk) 2711163953Srrs{ 2712163953Srrs struct sctp_association *asoc; 2713163953Srrs struct sctp_stream_reset_out_req *req; 2714163953Srrs struct sctp_stream_reset_out_request *r; 2715163953Srrs struct sctp_tmit_chunk *chk; 2716163953Srrs int len, clen; 2717163953Srrs 2718163953Srrs asoc = &stcb->asoc; 2719163953Srrs if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 2720163953Srrs return (NULL); 2721163953Srrs } 2722163953Srrs if (stcb->asoc.str_reset == NULL) { 2723163953Srrs return (NULL); 2724163953Srrs } 2725163953Srrs chk = stcb->asoc.str_reset; 2726163953Srrs if (chk->data == NULL) { 2727163953Srrs return (NULL); 2728163953Srrs } 2729163953Srrs if (bchk) { 2730163953Srrs /* he wants a copy of the chk pointer */ 2731163953Srrs *bchk = chk; 2732163953Srrs } 2733163953Srrs clen = chk->send_size; 2734163953Srrs req = mtod(chk->data, struct sctp_stream_reset_out_req *); 2735163953Srrs r = &req->sr_req; 2736163953Srrs if (ntohl(r->request_seq) == seq) { 2737163953Srrs /* found it */ 2738163953Srrs return (r); 2739163953Srrs } 2740163953Srrs len = SCTP_SIZE32(ntohs(r->ph.param_length)); 2741163953Srrs if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) { 2742163953Srrs /* move to the next one, there can only be a max of two */ 2743163953Srrs r = (struct sctp_stream_reset_out_request *)((caddr_t)r + len); 2744163953Srrs if (ntohl(r->request_seq) == seq) { 2745163953Srrs return (r); 2746163953Srrs } 2747163953Srrs } 2748163953Srrs /* that seq is not here */ 2749163953Srrs return (NULL); 2750163953Srrs} 2751163953Srrs 2752163953Srrsstatic void 2753163953Srrssctp_clean_up_stream_reset(struct sctp_tcb *stcb) 2754163953Srrs{ 2755163953Srrs struct sctp_association *asoc; 2756163953Srrs 2757163953Srrs asoc = &stcb->asoc; 2758163953Srrs struct sctp_tmit_chunk *chk = stcb->asoc.str_reset; 2759163953Srrs 2760163953Srrs if (stcb->asoc.str_reset == NULL) { 2761163953Srrs return; 2762163953Srrs } 2763165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_25); 2764163953Srrs TAILQ_REMOVE(&asoc->control_send_queue, 2765163953Srrs chk, 2766163953Srrs sctp_next); 2767163953Srrs if (chk->data) { 2768163953Srrs sctp_m_freem(chk->data); 2769163953Srrs chk->data = NULL; 2770163953Srrs } 2771163953Srrs asoc->ctrl_queue_cnt--; 2772163953Srrs sctp_free_remote_addr(chk->whoTo); 2773163953Srrs 2774163953Srrs sctp_free_a_chunk(stcb, chk); 2775163953Srrs stcb->asoc.str_reset = NULL; 2776163953Srrs} 2777163953Srrs 2778163953Srrs 2779163953Srrsstatic int 2780163953Srrssctp_handle_stream_reset_response(struct sctp_tcb *stcb, 2781163953Srrs uint32_t seq, uint32_t action, 2782164139Srrs struct sctp_stream_reset_response *respin) 2783163953Srrs{ 2784163953Srrs uint16_t type; 2785163953Srrs int lparm_len; 2786163953Srrs struct sctp_association *asoc = &stcb->asoc; 2787163953Srrs struct sctp_tmit_chunk *chk; 2788163953Srrs struct sctp_stream_reset_out_request *srparam; 2789163953Srrs int number_entries; 2790163953Srrs 2791163953Srrs if (asoc->stream_reset_outstanding == 0) { 2792163953Srrs /* duplicate */ 2793163953Srrs return (0); 2794163953Srrs } 2795163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 2796163953Srrs srparam = sctp_find_stream_reset(stcb, seq, &chk); 2797163953Srrs if (srparam) { 2798163953Srrs stcb->asoc.str_reset_seq_out++; 2799163953Srrs type = ntohs(srparam->ph.param_type); 2800163953Srrs lparm_len = ntohs(srparam->ph.param_length); 2801163953Srrs if (type == SCTP_STR_RESET_OUT_REQUEST) { 2802164139Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t); 2803163953Srrs asoc->stream_reset_out_is_outstanding = 0; 2804163953Srrs if (asoc->stream_reset_outstanding) 2805163953Srrs asoc->stream_reset_outstanding--; 2806163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2807163953Srrs /* do it */ 2808163953Srrs sctp_reset_out_streams(stcb, number_entries, srparam->list_of_streams); 2809163953Srrs } else { 2810163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, srparam->list_of_streams); 2811163953Srrs } 2812163953Srrs } else if (type == SCTP_STR_RESET_IN_REQUEST) { 2813163953Srrs /* Answered my request */ 2814164139Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t); 2815163953Srrs if (asoc->stream_reset_outstanding) 2816163953Srrs asoc->stream_reset_outstanding--; 2817163953Srrs if (action != SCTP_STREAM_RESET_PERFORMED) { 2818163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb, number_entries, srparam->list_of_streams); 2819163953Srrs } 2820163953Srrs } else if (type == SCTP_STR_RESET_TSN_REQUEST) { 2821163953Srrs /** 2822163953Srrs * a) Adopt the new in tsn. 2823163953Srrs * b) reset the map 2824163953Srrs * c) Adopt the new out-tsn 2825163953Srrs */ 2826163953Srrs struct sctp_stream_reset_response_tsn *resp; 2827163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2828163953Srrs int abort_flag = 0; 2829163953Srrs 2830163953Srrs if (respin == NULL) { 2831163953Srrs /* huh ? */ 2832163953Srrs return (0); 2833163953Srrs } 2834163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2835163953Srrs resp = (struct sctp_stream_reset_response_tsn *)respin; 2836163953Srrs asoc->stream_reset_outstanding--; 2837163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 2838163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 2839163953Srrs fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1); 2840163953Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag); 2841163953Srrs if (abort_flag) { 2842163953Srrs return (1); 2843163953Srrs } 2844163953Srrs stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1); 2845163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 2846163953Srrs stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn); 2847163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 2848163953Srrs stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn); 2849163953Srrs stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn; 2850163953Srrs 2851163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 2852163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 2853163953Srrs 2854163953Srrs } 2855163953Srrs } 2856163953Srrs /* get rid of the request and get the request flags */ 2857163953Srrs if (asoc->stream_reset_outstanding == 0) { 2858163953Srrs sctp_clean_up_stream_reset(stcb); 2859163953Srrs } 2860163953Srrs } 2861163953Srrs } 2862163953Srrs return (0); 2863163953Srrs} 2864163953Srrs 2865163953Srrsstatic void 2866163953Srrssctp_handle_str_reset_request_in(struct sctp_tcb *stcb, 2867163953Srrs struct sctp_tmit_chunk *chk, 2868163953Srrs struct sctp_stream_reset_in_request *req) 2869163953Srrs{ 2870163953Srrs uint32_t seq; 2871163953Srrs int len, i; 2872163953Srrs int number_entries; 2873163953Srrs uint16_t temp; 2874163953Srrs 2875163953Srrs /* 2876163953Srrs * peer wants me to send a str-reset to him for my outgoing seq's if 2877163953Srrs * seq_in is right. 2878163953Srrs */ 2879163953Srrs struct sctp_association *asoc = &stcb->asoc; 2880163953Srrs 2881163953Srrs seq = ntohl(req->request_seq); 2882163953Srrs if (asoc->str_reset_seq_in == seq) { 2883163953Srrs if (stcb->asoc.stream_reset_out_is_outstanding == 0) { 2884163953Srrs len = ntohs(req->ph.param_length); 2885163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t)); 2886163953Srrs for (i = 0; i < number_entries; i++) { 2887163953Srrs temp = ntohs(req->list_of_streams[i]); 2888163953Srrs req->list_of_streams[i] = temp; 2889163953Srrs } 2890163953Srrs /* move the reset action back one */ 2891163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2892163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2893163953Srrs sctp_add_stream_reset_out(chk, number_entries, req->list_of_streams, 2894163953Srrs asoc->str_reset_seq_out, 2895163953Srrs seq, (asoc->sending_seq - 1)); 2896163953Srrs asoc->stream_reset_out_is_outstanding = 1; 2897163953Srrs asoc->str_reset = chk; 2898163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 2899163953Srrs stcb->asoc.stream_reset_outstanding++; 2900163953Srrs } else { 2901163953Srrs /* Can't do it, since we have sent one out */ 2902163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2903163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_TRY_LATER; 2904163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2905163953Srrs } 2906163953Srrs asoc->str_reset_seq_in++; 2907163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 2908163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2909163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 2910163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 2911163953Srrs } else { 2912163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2913163953Srrs } 2914163953Srrs} 2915163953Srrs 2916163953Srrsstatic int 2917163953Srrssctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb, 2918163953Srrs struct sctp_tmit_chunk *chk, 2919163953Srrs struct sctp_stream_reset_tsn_request *req) 2920163953Srrs{ 2921163953Srrs /* reset all in and out and update the tsn */ 2922163953Srrs /* 2923163953Srrs * A) reset my str-seq's on in and out. B) Select a receive next, 2924163953Srrs * and set cum-ack to it. Also process this selected number as a 2925163953Srrs * fwd-tsn as well. C) set in the response my next sending seq. 2926163953Srrs */ 2927163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2928163953Srrs struct sctp_association *asoc = &stcb->asoc; 2929163953Srrs int abort_flag = 0; 2930163953Srrs uint32_t seq; 2931163953Srrs 2932163953Srrs seq = ntohl(req->request_seq); 2933163953Srrs if (asoc->str_reset_seq_in == seq) { 2934163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 2935163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 2936163953Srrs fwdtsn.ch.chunk_flags = 0; 2937163953Srrs fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1); 2938163953Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag); 2939163953Srrs if (abort_flag) { 2940163953Srrs return (1); 2941163953Srrs } 2942163953Srrs stcb->asoc.highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA; 2943163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 2944163953Srrs stcb->asoc.mapping_array_base_tsn = stcb->asoc.highest_tsn_inside_map + 1; 2945163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 2946163953Srrs atomic_add_int(&stcb->asoc.sending_seq, 1); 2947163953Srrs /* save off historical data for retrans */ 2948163953Srrs stcb->asoc.last_sending_seq[1] = stcb->asoc.last_sending_seq[0]; 2949163953Srrs stcb->asoc.last_sending_seq[0] = stcb->asoc.sending_seq; 2950163953Srrs stcb->asoc.last_base_tsnsent[1] = stcb->asoc.last_base_tsnsent[0]; 2951163953Srrs stcb->asoc.last_base_tsnsent[0] = stcb->asoc.mapping_array_base_tsn; 2952163953Srrs 2953163953Srrs sctp_add_stream_reset_result_tsn(chk, 2954163953Srrs ntohl(req->request_seq), 2955163953Srrs SCTP_STREAM_RESET_PERFORMED, 2956163953Srrs stcb->asoc.sending_seq, 2957163953Srrs stcb->asoc.mapping_array_base_tsn); 2958163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 2959163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 2960163953Srrs stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0]; 2961163953Srrs stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2962163953Srrs 2963163953Srrs asoc->str_reset_seq_in++; 2964163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 2965163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0], 2966163953Srrs stcb->asoc.last_sending_seq[0], 2967163953Srrs stcb->asoc.last_base_tsnsent[0] 2968163953Srrs ); 2969163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 2970163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1], 2971163953Srrs stcb->asoc.last_sending_seq[1], 2972163953Srrs stcb->asoc.last_base_tsnsent[1] 2973163953Srrs ); 2974163953Srrs } else { 2975163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2976163953Srrs } 2977163953Srrs return (0); 2978163953Srrs} 2979163953Srrs 2980163953Srrsstatic void 2981163953Srrssctp_handle_str_reset_request_out(struct sctp_tcb *stcb, 2982163953Srrs struct sctp_tmit_chunk *chk, 2983163953Srrs struct sctp_stream_reset_out_request *req) 2984163953Srrs{ 2985163953Srrs uint32_t seq, tsn; 2986163953Srrs int number_entries, len; 2987163953Srrs struct sctp_association *asoc = &stcb->asoc; 2988163953Srrs 2989163953Srrs seq = ntohl(req->request_seq); 2990163953Srrs 2991163953Srrs /* now if its not a duplicate we process it */ 2992163953Srrs if (asoc->str_reset_seq_in == seq) { 2993163953Srrs len = ntohs(req->ph.param_length); 2994163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t)); 2995163953Srrs /* 2996163953Srrs * the sender is resetting, handle the list issue.. we must 2997163953Srrs * a) verify if we can do the reset, if so no problem b) If 2998163953Srrs * we can't do the reset we must copy the request. c) queue 2999163953Srrs * it, and setup the data in processor to trigger it off 3000163953Srrs * when needed and dequeue all the queued data. 3001163953Srrs */ 3002163953Srrs tsn = ntohl(req->send_reset_at_tsn); 3003163953Srrs 3004163953Srrs /* move the reset action back one */ 3005163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 3006163953Srrs if ((tsn == asoc->cumulative_tsn) || 3007163953Srrs (compare_with_wrap(asoc->cumulative_tsn, tsn, MAX_TSN))) { 3008163953Srrs /* we can do it now */ 3009163953Srrs sctp_reset_in_stream(stcb, number_entries, req->list_of_streams); 3010163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 3011163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3012163953Srrs } else { 3013163953Srrs /* 3014163953Srrs * we must queue it up and thus wait for the TSN's 3015163953Srrs * to arrive that are at or before tsn 3016163953Srrs */ 3017163953Srrs struct sctp_stream_reset_list *liste; 3018163953Srrs int siz; 3019163953Srrs 3020163953Srrs siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t)); 3021163953Srrs SCTP_MALLOC(liste, struct sctp_stream_reset_list *, 3022163953Srrs siz, "StrRstList"); 3023163953Srrs if (liste == NULL) { 3024163953Srrs /* gak out of memory */ 3025163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_DENIED); 3026163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_DENIED; 3027163953Srrs return; 3028163953Srrs } 3029163953Srrs liste->tsn = tsn; 3030163953Srrs liste->number_entries = number_entries; 3031163953Srrs memcpy(&liste->req, req, 3032163953Srrs (sizeof(struct sctp_stream_reset_out_request) + (number_entries * sizeof(uint16_t)))); 3033163953Srrs TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp); 3034163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 3035163953Srrs 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 /* 3040163953Srrs * one seq back, just echo back last action since my 3041163953Srrs * response was lost. 3042163953Srrs */ 3043163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 3044163953Srrs } else if ((asoc->str_reset_seq_in - 2) == seq) { 3045163953Srrs /* 3046163953Srrs * two seq back, just echo back last action since my 3047163953Srrs * response was lost. 3048163953Srrs */ 3049163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 3050163953Srrs } else { 3051163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 3052163953Srrs } 3053163953Srrs} 3054163953Srrs 3055163953Srrsstatic int 3056163953Srrssctp_handle_stream_reset(struct sctp_tcb *stcb, struct sctp_stream_reset_out_req *sr_req) 3057163953Srrs{ 3058163953Srrs int chk_length, param_len, ptype; 3059163953Srrs uint32_t seq; 3060163953Srrs int num_req = 0; 3061163953Srrs struct sctp_tmit_chunk *chk; 3062163953Srrs struct sctp_chunkhdr *ch; 3063163953Srrs struct sctp_paramhdr *ph; 3064163953Srrs 3065163953Srrs /* now it may be a reset or a reset-response */ 3066163953Srrs chk_length = ntohs(sr_req->ch.chunk_length); 3067163953Srrs int ret_code = 0; 3068163953Srrs int num_param = 0; 3069163953Srrs 3070163953Srrs /* setup for adding the response */ 3071163953Srrs sctp_alloc_a_chunk(stcb, chk); 3072163953Srrs if (chk == NULL) { 3073163953Srrs return (ret_code); 3074163953Srrs } 3075163953Srrs chk->rec.chunk_id.id = SCTP_STREAM_RESET; 3076163953Srrs chk->asoc = &stcb->asoc; 3077163953Srrs chk->no_fr_allowed = 0; 3078163953Srrs chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr); 3079165647Srrs chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 3080163953Srrs if (chk->data == NULL) { 3081163953Srrsstrres_nochunk: 3082163953Srrs if (chk->data) { 3083163953Srrs sctp_m_freem(chk->data); 3084163953Srrs chk->data = NULL; 3085163953Srrs } 3086163953Srrs sctp_free_a_chunk(stcb, chk); 3087163953Srrs return (ret_code); 3088163953Srrs } 3089165647Srrs SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 3090163953Srrs 3091163953Srrs /* setup chunk parameters */ 3092163953Srrs chk->sent = SCTP_DATAGRAM_UNSENT; 3093163953Srrs chk->snd_count = 0; 3094163953Srrs chk->whoTo = stcb->asoc.primary_destination; 3095163953Srrs atomic_add_int(&chk->whoTo->ref_count, 1); 3096163953Srrs 3097163953Srrs ch = mtod(chk->data, struct sctp_chunkhdr *); 3098163953Srrs ch->chunk_type = SCTP_STREAM_RESET; 3099163953Srrs ch->chunk_flags = 0; 3100163953Srrs ch->chunk_length = htons(chk->send_size); 3101165647Srrs SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 3102163953Srrs 3103163953Srrs 3104163953Srrs ph = (struct sctp_paramhdr *)&sr_req->sr_req; 3105163953Srrs while ((size_t)chk_length >= sizeof(struct sctp_stream_reset_tsn_request)) { 3106163953Srrs param_len = ntohs(ph->param_length); 3107163953Srrs if (param_len < (int)sizeof(struct sctp_stream_reset_tsn_request)) { 3108163953Srrs /* bad param */ 3109163953Srrs break; 3110163953Srrs } 3111163953Srrs ptype = ntohs(ph->param_type); 3112163953Srrs num_param++; 3113163953Srrs if (num_param > SCTP_MAX_RESET_PARAMS) { 3114163953Srrs /* hit the max of parameters already sorry.. */ 3115163953Srrs break; 3116163953Srrs } 3117163953Srrs if (ptype == SCTP_STR_RESET_OUT_REQUEST) { 3118163953Srrs struct sctp_stream_reset_out_request *req_out; 3119163953Srrs 3120163953Srrs req_out = (struct sctp_stream_reset_out_request *)ph; 3121163953Srrs num_req++; 3122163953Srrs if (stcb->asoc.stream_reset_outstanding) { 3123163953Srrs seq = ntohl(req_out->response_seq); 3124163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 3125163953Srrs /* implicit ack */ 3126163953Srrs sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_PERFORMED, NULL); 3127163953Srrs } 3128163953Srrs } 3129163953Srrs sctp_handle_str_reset_request_out(stcb, chk, req_out); 3130163953Srrs } else if (ptype == SCTP_STR_RESET_IN_REQUEST) { 3131163953Srrs struct sctp_stream_reset_in_request *req_in; 3132163953Srrs 3133163953Srrs num_req++; 3134163953Srrs req_in = (struct sctp_stream_reset_in_request *)ph; 3135163953Srrs sctp_handle_str_reset_request_in(stcb, chk, req_in); 3136163953Srrs } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) { 3137163953Srrs struct sctp_stream_reset_tsn_request *req_tsn; 3138163953Srrs 3139163953Srrs num_req++; 3140163953Srrs req_tsn = (struct sctp_stream_reset_tsn_request *)ph; 3141163953Srrs if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) { 3142163953Srrs ret_code = 1; 3143163953Srrs goto strres_nochunk; 3144163953Srrs } 3145163953Srrs /* no more */ 3146163953Srrs break; 3147163953Srrs } else if (ptype == SCTP_STR_RESET_RESPONSE) { 3148163953Srrs struct sctp_stream_reset_response *resp; 3149163953Srrs uint32_t result; 3150163953Srrs 3151163953Srrs resp = (struct sctp_stream_reset_response *)ph; 3152163953Srrs seq = ntohl(resp->response_seq); 3153163953Srrs result = ntohl(resp->result); 3154163953Srrs if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) { 3155163953Srrs ret_code = 1; 3156163953Srrs goto strres_nochunk; 3157163953Srrs } 3158163953Srrs } else { 3159163953Srrs break; 3160163953Srrs } 3161163953Srrs 3162163953Srrs ph = (struct sctp_paramhdr *)((caddr_t)ph + SCTP_SIZE32(param_len)); 3163163953Srrs chk_length -= SCTP_SIZE32(param_len); 3164163953Srrs } 3165163953Srrs if (num_req == 0) { 3166163953Srrs /* we have no response free the stuff */ 3167163953Srrs goto strres_nochunk; 3168163953Srrs } 3169163953Srrs /* ok we have a chunk to link in */ 3170163953Srrs TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, 3171163953Srrs chk, 3172163953Srrs sctp_next); 3173163953Srrs stcb->asoc.ctrl_queue_cnt++; 3174163953Srrs return (ret_code); 3175163953Srrs} 3176163953Srrs 3177163953Srrs/* 3178163953Srrs * Handle a router or endpoints report of a packet loss, there are two ways 3179163953Srrs * to handle this, either we get the whole packet and must disect it 3180163953Srrs * ourselves (possibly with truncation and or corruption) or it is a summary 3181163953Srrs * from a middle box that did the disectting for us. 3182163953Srrs */ 3183163953Srrsstatic void 3184163953Srrssctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp, 3185163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 3186163953Srrs{ 3187163953Srrs uint32_t bottle_bw, on_queue; 3188163953Srrs uint16_t trunc_len; 3189163953Srrs unsigned int chlen; 3190163953Srrs unsigned int at; 3191163953Srrs struct sctp_chunk_desc desc; 3192163953Srrs struct sctp_chunkhdr *ch; 3193163953Srrs 3194163953Srrs chlen = ntohs(cp->ch.chunk_length); 3195163953Srrs chlen -= sizeof(struct sctp_pktdrop_chunk); 3196163953Srrs /* XXX possible chlen underflow */ 3197163953Srrs if (chlen == 0) { 3198163953Srrs ch = NULL; 3199163953Srrs if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) 3200163953Srrs SCTP_STAT_INCR(sctps_pdrpbwrpt); 3201163953Srrs } else { 3202163953Srrs ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr)); 3203163953Srrs chlen -= sizeof(struct sctphdr); 3204163953Srrs /* XXX possible chlen underflow */ 3205163953Srrs memset(&desc, 0, sizeof(desc)); 3206163953Srrs } 3207163953Srrs trunc_len = (uint16_t) ntohs(cp->trunc_len); 3208163953Srrs /* now the chunks themselves */ 3209163953Srrs while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) { 3210163953Srrs desc.chunk_type = ch->chunk_type; 3211163953Srrs /* get amount we need to move */ 3212163953Srrs at = ntohs(ch->chunk_length); 3213163953Srrs if (at < sizeof(struct sctp_chunkhdr)) { 3214163953Srrs /* corrupt chunk, maybe at the end? */ 3215163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3216163953Srrs break; 3217163953Srrs } 3218163953Srrs if (trunc_len == 0) { 3219163953Srrs /* we are supposed to have all of it */ 3220163953Srrs if (at > chlen) { 3221163953Srrs /* corrupt skip it */ 3222163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3223163953Srrs break; 3224163953Srrs } 3225163953Srrs } else { 3226163953Srrs /* is there enough of it left ? */ 3227163953Srrs if (desc.chunk_type == SCTP_DATA) { 3228163953Srrs if (chlen < (sizeof(struct sctp_data_chunk) + 3229163953Srrs sizeof(desc.data_bytes))) { 3230163953Srrs break; 3231163953Srrs } 3232163953Srrs } else { 3233163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3234163953Srrs break; 3235163953Srrs } 3236163953Srrs } 3237163953Srrs } 3238163953Srrs if (desc.chunk_type == SCTP_DATA) { 3239163953Srrs /* can we get out the tsn? */ 3240163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3241163953Srrs SCTP_STAT_INCR(sctps_pdrpmbda); 3242163953Srrs 3243163953Srrs if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) { 3244163953Srrs /* yep */ 3245163953Srrs struct sctp_data_chunk *dcp; 3246163953Srrs uint8_t *ddp; 3247163953Srrs unsigned int iii; 3248163953Srrs 3249163953Srrs dcp = (struct sctp_data_chunk *)ch; 3250163953Srrs ddp = (uint8_t *) (dcp + 1); 3251163953Srrs for (iii = 0; iii < sizeof(desc.data_bytes); iii++) { 3252163953Srrs desc.data_bytes[iii] = ddp[iii]; 3253163953Srrs } 3254163953Srrs desc.tsn_ifany = dcp->dp.tsn; 3255163953Srrs } else { 3256163953Srrs /* nope we are done. */ 3257163953Srrs SCTP_STAT_INCR(sctps_pdrpnedat); 3258163953Srrs break; 3259163953Srrs } 3260163953Srrs } else { 3261163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3262163953Srrs SCTP_STAT_INCR(sctps_pdrpmbct); 3263163953Srrs } 3264163953Srrs 3265163953Srrs if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) { 3266163953Srrs SCTP_STAT_INCR(sctps_pdrppdbrk); 3267163953Srrs break; 3268163953Srrs } 3269163953Srrs if (SCTP_SIZE32(at) > chlen) { 3270163953Srrs break; 3271163953Srrs } 3272163953Srrs chlen -= SCTP_SIZE32(at); 3273163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3274163953Srrs /* done, none left */ 3275163953Srrs break; 3276163953Srrs } 3277163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at)); 3278163953Srrs } 3279163953Srrs /* Now update any rwnd --- possibly */ 3280163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) { 3281163953Srrs /* From a peer, we get a rwnd report */ 3282163953Srrs uint32_t a_rwnd; 3283163953Srrs 3284163953Srrs SCTP_STAT_INCR(sctps_pdrpfehos); 3285163953Srrs 3286163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3287163953Srrs on_queue = ntohl(cp->current_onq); 3288163953Srrs if (bottle_bw && on_queue) { 3289163953Srrs /* a rwnd report is in here */ 3290163953Srrs if (bottle_bw > on_queue) 3291163953Srrs a_rwnd = bottle_bw - on_queue; 3292163953Srrs else 3293163953Srrs a_rwnd = 0; 3294163953Srrs 3295163953Srrs if (a_rwnd == 0) 3296163953Srrs stcb->asoc.peers_rwnd = 0; 3297163953Srrs else { 3298163953Srrs if (a_rwnd > stcb->asoc.total_flight) { 3299163953Srrs stcb->asoc.peers_rwnd = 3300163953Srrs a_rwnd - stcb->asoc.total_flight; 3301163953Srrs } else { 3302163953Srrs stcb->asoc.peers_rwnd = 0; 3303163953Srrs } 3304163953Srrs if (stcb->asoc.peers_rwnd < 3305163953Srrs stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 3306163953Srrs /* SWS sender side engages */ 3307163953Srrs stcb->asoc.peers_rwnd = 0; 3308163953Srrs } 3309163953Srrs } 3310163953Srrs } 3311163953Srrs } else { 3312163953Srrs SCTP_STAT_INCR(sctps_pdrpfmbox); 3313163953Srrs } 3314163953Srrs 3315163953Srrs /* now middle boxes in sat networks get a cwnd bump */ 3316163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) && 3317163953Srrs (stcb->asoc.sat_t3_loss_recovery == 0) && 3318163953Srrs (stcb->asoc.sat_network)) { 3319163953Srrs /* 3320163953Srrs * This is debateable but for sat networks it makes sense 3321163953Srrs * Note if a T3 timer has went off, we will prohibit any 3322163953Srrs * changes to cwnd until we exit the t3 loss recovery. 3323163953Srrs */ 3324163953Srrs uint32_t bw_avail; 3325163953Srrs int rtt, incr; 3326163953Srrs 3327163953Srrs#ifdef SCTP_CWND_MONITOR 3328163953Srrs int old_cwnd = net->cwnd; 3329163953Srrs 3330163953Srrs#endif 3331163953Srrs /* need real RTT for this calc */ 3332163953Srrs rtt = ((net->lastsa >> 2) + net->lastsv) >> 1; 3333163953Srrs /* get bottle neck bw */ 3334163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3335163953Srrs /* and whats on queue */ 3336163953Srrs on_queue = ntohl(cp->current_onq); 3337163953Srrs /* 3338163953Srrs * adjust the on-queue if our flight is more it could be 3339163953Srrs * that the router has not yet gotten data "in-flight" to it 3340163953Srrs */ 3341163953Srrs if (on_queue < net->flight_size) 3342163953Srrs on_queue = net->flight_size; 3343163953Srrs 3344163953Srrs /* calculate the available space */ 3345163953Srrs bw_avail = (bottle_bw * rtt) / 1000; 3346163953Srrs if (bw_avail > bottle_bw) { 3347163953Srrs /* 3348163953Srrs * Cap the growth to no more than the bottle neck. 3349163953Srrs * This can happen as RTT slides up due to queues. 3350163953Srrs * It also means if you have more than a 1 second 3351163953Srrs * RTT with a empty queue you will be limited to the 3352163953Srrs * bottle_bw per second no matter if other points 3353163953Srrs * have 1/2 the RTT and you could get more out... 3354163953Srrs */ 3355163953Srrs bw_avail = bottle_bw; 3356163953Srrs } 3357163953Srrs if (on_queue > bw_avail) { 3358163953Srrs /* 3359163953Srrs * No room for anything else don't allow anything 3360163953Srrs * else to be "added to the fire". 3361163953Srrs */ 3362163953Srrs int seg_inflight, seg_onqueue, my_portion; 3363163953Srrs 3364163953Srrs net->partial_bytes_acked = 0; 3365163953Srrs 3366163953Srrs /* how much are we over queue size? */ 3367163953Srrs incr = on_queue - bw_avail; 3368163953Srrs if (stcb->asoc.seen_a_sack_this_pkt) { 3369163953Srrs /* 3370163953Srrs * undo any cwnd adjustment that the sack 3371163953Srrs * might have made 3372163953Srrs */ 3373163953Srrs net->cwnd = net->prev_cwnd; 3374163953Srrs } 3375163953Srrs /* Now how much of that is mine? */ 3376163953Srrs seg_inflight = net->flight_size / net->mtu; 3377163953Srrs seg_onqueue = on_queue / net->mtu; 3378163953Srrs my_portion = (incr * seg_inflight) / seg_onqueue; 3379163953Srrs 3380163953Srrs /* Have I made an adjustment already */ 3381163953Srrs if (net->cwnd > net->flight_size) { 3382163953Srrs /* 3383163953Srrs * for this flight I made an adjustment we 3384163953Srrs * need to decrease the portion by a share 3385163953Srrs * our previous adjustment. 3386163953Srrs */ 3387163953Srrs int diff_adj; 3388163953Srrs 3389163953Srrs diff_adj = net->cwnd - net->flight_size; 3390163953Srrs if (diff_adj > my_portion) 3391163953Srrs my_portion = 0; 3392163953Srrs else 3393163953Srrs my_portion -= diff_adj; 3394163953Srrs } 3395163953Srrs /* 3396163953Srrs * back down to the previous cwnd (assume we have 3397163953Srrs * had a sack before this packet). minus what ever 3398163953Srrs * portion of the overage is my fault. 3399163953Srrs */ 3400163953Srrs net->cwnd -= my_portion; 3401163953Srrs 3402163953Srrs /* we will NOT back down more than 1 MTU */ 3403163953Srrs if (net->cwnd <= net->mtu) { 3404163953Srrs net->cwnd = net->mtu; 3405163953Srrs } 3406163953Srrs /* force into CA */ 3407163953Srrs net->ssthresh = net->cwnd - 1; 3408163953Srrs } else { 3409163953Srrs /* 3410163953Srrs * Take 1/4 of the space left or max burst up .. 3411163953Srrs * whichever is less. 3412163953Srrs */ 3413163953Srrs incr = min((bw_avail - on_queue) >> 2, 3414163953Srrs (int)stcb->asoc.max_burst * (int)net->mtu); 3415163953Srrs net->cwnd += incr; 3416163953Srrs } 3417163953Srrs if (net->cwnd > bw_avail) { 3418163953Srrs /* We can't exceed the pipe size */ 3419163953Srrs net->cwnd = bw_avail; 3420163953Srrs } 3421163953Srrs if (net->cwnd < net->mtu) { 3422163953Srrs /* We always have 1 MTU */ 3423163953Srrs net->cwnd = net->mtu; 3424163953Srrs } 3425163953Srrs#ifdef SCTP_CWND_MONITOR 3426163953Srrs if (net->cwnd - old_cwnd != 0) { 3427163953Srrs /* log only changes */ 3428163953Srrs sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), 3429163953Srrs SCTP_CWND_LOG_FROM_SAT); 3430163953Srrs } 3431163953Srrs#endif 3432163953Srrs } 3433163953Srrs} 3434163953Srrs 3435163953Srrsextern int sctp_strict_init; 3436163953Srrsextern int sctp_abort_if_one_2_one_hits_limit; 3437163953Srrs 3438163953Srrs/* 3439163953Srrs * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to 3440163953Srrs * still contain IP/SCTP header - stcb: is the tcb found for this packet - 3441163953Srrs * offset: offset into the mbuf chain to first chunkhdr - length: is the 3442163953Srrs * length of the complete packet outputs: - length: modified to remaining 3443163953Srrs * length after control processing - netp: modified to new sctp_nets after 3444163953Srrs * cookie-echo processing - return NULL to discard the packet (ie. no asoc, 3445163953Srrs * bad packet,...) otherwise return the tcb for this packet 3446163953Srrs */ 3447163953Srrsstatic struct sctp_tcb * 3448163953Srrssctp_process_control(struct mbuf *m, int iphlen, int *offset, int length, 3449163953Srrs struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp, 3450163953Srrs struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen) 3451163953Srrs{ 3452163953Srrs struct sctp_association *asoc; 3453163953Srrs uint32_t vtag_in; 3454163953Srrs int num_chunks = 0; /* number of control chunks processed */ 3455163953Srrs int chk_length; 3456163953Srrs int ret; 3457163953Srrs 3458163953Srrs /* 3459163953Srrs * How big should this be, and should it be alloc'd? Lets try the 3460163953Srrs * d-mtu-ceiling for now (2k) and that should hopefully work ... 3461163953Srrs * until we get into jumbo grams and such.. 3462163953Srrs */ 3463163953Srrs uint8_t chunk_buf[DEFAULT_CHUNK_BUFFER]; 3464163953Srrs struct sctp_tcb *locked_tcb = stcb; 3465163953Srrs int got_auth = 0; 3466163953Srrs uint32_t auth_offset = 0, auth_len = 0; 3467163953Srrs int auth_skipped = 0; 3468163953Srrs 3469163953Srrs#ifdef SCTP_DEBUG 3470163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 3471163953Srrs printf("sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n", 3472163953Srrs iphlen, *offset, length, stcb); 3473163953Srrs } 3474163953Srrs#endif /* SCTP_DEBUG */ 3475163953Srrs 3476163953Srrs /* validate chunk header length... */ 3477163953Srrs if (ntohs(ch->chunk_length) < sizeof(*ch)) { 3478163953Srrs return (NULL); 3479163953Srrs } 3480163953Srrs /* 3481163953Srrs * validate the verification tag 3482163953Srrs */ 3483163953Srrs vtag_in = ntohl(sh->v_tag); 3484163953Srrs 3485165220Srrs if (locked_tcb) { 3486165220Srrs SCTP_TCB_LOCK_ASSERT(locked_tcb); 3487165220Srrs } 3488163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 3489163953Srrs if (vtag_in != 0) { 3490163953Srrs /* protocol error- silently discard... */ 3491163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3492163953Srrs if (locked_tcb) 3493163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3494163953Srrs return (NULL); 3495163953Srrs } 3496163953Srrs } else if (ch->chunk_type != SCTP_COOKIE_ECHO) { 3497163953Srrs /* 3498163953Srrs * If there is no stcb, skip the AUTH chunk and process 3499163953Srrs * later after a stcb is found (to validate the lookup was 3500163953Srrs * valid. 3501163953Srrs */ 3502163953Srrs if ((ch->chunk_type == SCTP_AUTHENTICATION) && 3503163953Srrs (stcb == NULL) && !sctp_auth_disable) { 3504163953Srrs /* save this chunk for later processing */ 3505163953Srrs auth_skipped = 1; 3506163953Srrs auth_offset = *offset; 3507163953Srrs auth_len = ntohs(ch->chunk_length); 3508163953Srrs 3509163953Srrs /* (temporarily) move past this chunk */ 3510163953Srrs *offset += SCTP_SIZE32(auth_len); 3511163953Srrs if (*offset >= length) { 3512163953Srrs /* no more data left in the mbuf chain */ 3513163953Srrs *offset = length; 3514163953Srrs return (NULL); 3515163953Srrs } 3516163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3517163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 3518163953Srrs } 3519163953Srrs if (ch->chunk_type == SCTP_COOKIE_ECHO) { 3520163953Srrs goto process_control_chunks; 3521163953Srrs } 3522163953Srrs /* 3523163953Srrs * first check if it's an ASCONF with an unknown src addr we 3524163953Srrs * need to look inside to find the association 3525163953Srrs */ 3526163953Srrs if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) { 3527163953Srrs /* inp's refcount may be reduced */ 3528163953Srrs SCTP_INP_INCR_REF(inp); 3529163953Srrs 3530163953Srrs stcb = sctp_findassociation_ep_asconf(m, iphlen, 3531163953Srrs *offset, sh, &inp, netp); 3532163953Srrs if (stcb == NULL) { 3533163953Srrs /* 3534163953Srrs * reduce inp's refcount if not reduced in 3535163953Srrs * sctp_findassociation_ep_asconf(). 3536163953Srrs */ 3537163953Srrs SCTP_INP_DECR_REF(inp); 3538163953Srrs } 3539163953Srrs /* now go back and verify any auth chunk to be sure */ 3540163953Srrs if (auth_skipped && (stcb != NULL)) { 3541163953Srrs struct sctp_auth_chunk *auth; 3542163953Srrs 3543163953Srrs auth = (struct sctp_auth_chunk *) 3544163953Srrs sctp_m_getptr(m, auth_offset, 3545163953Srrs auth_len, chunk_buf); 3546163953Srrs got_auth = 1; 3547163953Srrs auth_skipped = 0; 3548163953Srrs if (sctp_handle_auth(stcb, auth, m, 3549163953Srrs auth_offset)) { 3550163953Srrs /* auth HMAC failed so dump it */ 3551163953Srrs *offset = length; 3552163953Srrs return (NULL); 3553163953Srrs } else { 3554163953Srrs /* remaining chunks are HMAC checked */ 3555163953Srrs stcb->asoc.authenticated = 1; 3556163953Srrs } 3557163953Srrs } 3558163953Srrs } 3559163953Srrs if (stcb == NULL) { 3560163953Srrs /* no association, so it's out of the blue... */ 3561163953Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, NULL); 3562163953Srrs *offset = length; 3563163953Srrs if (locked_tcb) 3564163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3565163953Srrs return (NULL); 3566163953Srrs } 3567163953Srrs asoc = &stcb->asoc; 3568163953Srrs /* ABORT and SHUTDOWN can use either v_tag... */ 3569163953Srrs if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) || 3570163953Srrs (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) || 3571163953Srrs (ch->chunk_type == SCTP_PACKET_DROPPED)) { 3572163953Srrs if ((vtag_in == asoc->my_vtag) || 3573163953Srrs ((ch->chunk_flags & SCTP_HAD_NO_TCB) && 3574163953Srrs (vtag_in == asoc->peer_vtag))) { 3575163953Srrs /* this is valid */ 3576163953Srrs } else { 3577163953Srrs /* drop this packet... */ 3578163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3579163953Srrs if (locked_tcb) 3580163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3581163953Srrs return (NULL); 3582163953Srrs } 3583163953Srrs } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 3584163953Srrs if (vtag_in != asoc->my_vtag) { 3585163953Srrs /* 3586163953Srrs * this could be a stale SHUTDOWN-ACK or the 3587163953Srrs * peer never got the SHUTDOWN-COMPLETE and 3588163953Srrs * is still hung; we have started a new asoc 3589163953Srrs * but it won't complete until the shutdown 3590163953Srrs * is completed 3591163953Srrs */ 3592163953Srrs if (locked_tcb) 3593163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3594163953Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, 3595163953Srrs NULL); 3596163953Srrs return (NULL); 3597163953Srrs } 3598163953Srrs } else { 3599163953Srrs /* for all other chunks, vtag must match */ 3600163953Srrs if (vtag_in != asoc->my_vtag) { 3601163953Srrs /* invalid vtag... */ 3602163953Srrs#ifdef SCTP_DEBUG 3603163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3604163953Srrs printf("invalid vtag: %xh, expect %xh\n", vtag_in, asoc->my_vtag); 3605163953Srrs } 3606163953Srrs#endif /* SCTP_DEBUG */ 3607163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3608163953Srrs if (locked_tcb) 3609163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3610163953Srrs *offset = length; 3611163953Srrs return (NULL); 3612163953Srrs } 3613163953Srrs } 3614163953Srrs } /* end if !SCTP_COOKIE_ECHO */ 3615163953Srrs /* 3616163953Srrs * process all control chunks... 3617163953Srrs */ 3618163953Srrs if (((ch->chunk_type == SCTP_SELECTIVE_ACK) || 3619163953Srrs (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) && 3620163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 3621163953Srrs /* implied cookie-ack.. we must have lost the ack */ 3622163953Srrs stcb->asoc.overall_error_count = 0; 3623163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, 3624163953Srrs *netp); 3625163953Srrs } 3626163953Srrsprocess_control_chunks: 3627163953Srrs 3628163953Srrs while (IS_SCTP_CONTROL(ch)) { 3629163953Srrs /* validate chunk length */ 3630163953Srrs chk_length = ntohs(ch->chunk_length); 3631163953Srrs#ifdef SCTP_DEBUG 3632163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 3633163953Srrs printf("sctp_process_control: processing a chunk type=%u, len=%u\n", 3634163953Srrs ch->chunk_type, chk_length); 3635163953Srrs } 3636163953Srrs#endif /* SCTP_DEBUG */ 3637163953Srrs if ((size_t)chk_length < sizeof(*ch) || 3638163953Srrs (*offset + chk_length) > length) { 3639163953Srrs *offset = length; 3640163953Srrs if (locked_tcb) 3641163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3642163953Srrs return (NULL); 3643163953Srrs } 3644163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks); 3645163953Srrs /* 3646163953Srrs * INIT-ACK only gets the init ack "header" portion only 3647163953Srrs * because we don't have to process the peer's COOKIE. All 3648163953Srrs * others get a complete chunk. 3649163953Srrs */ 3650163953Srrs if (ch->chunk_type == SCTP_INITIATION_ACK) { 3651163953Srrs /* get an init-ack chunk */ 3652163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3653163953Srrs sizeof(struct sctp_init_ack_chunk), chunk_buf); 3654163953Srrs if (ch == NULL) { 3655163953Srrs *offset = length; 3656163953Srrs if (locked_tcb) 3657163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3658163953Srrs return (NULL); 3659163953Srrs } 3660163953Srrs } else { 3661163953Srrs /* get a complete chunk... */ 3662163953Srrs if ((size_t)chk_length > sizeof(chunk_buf)) { 3663163953Srrs struct mbuf *oper; 3664163953Srrs struct sctp_paramhdr *phdr; 3665163953Srrs 3666163953Srrs oper = NULL; 3667163953Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3668165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 3669163953Srrs if (oper) { 3670163953Srrs /* pre-reserve some space */ 3671165647Srrs SCTP_BUF_RESV_UF(oper, sizeof(struct sctp_chunkhdr)); 3672165647Srrs SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr); 3673163953Srrs phdr = mtod(oper, struct sctp_paramhdr *); 3674163953Srrs phdr->param_type = htons(SCTP_CAUSE_OUT_OF_RESC); 3675163953Srrs phdr->param_length = htons(sizeof(struct sctp_paramhdr)); 3676163953Srrs sctp_queue_op_err(stcb, oper); 3677163953Srrs } 3678163953Srrs if (locked_tcb) 3679163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3680163953Srrs return (NULL); 3681163953Srrs } 3682163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3683163953Srrs chk_length, chunk_buf); 3684163953Srrs if (ch == NULL) { 3685163953Srrs printf("sctp_process_control: Can't get the all data....\n"); 3686163953Srrs *offset = length; 3687163953Srrs if (locked_tcb) 3688163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3689163953Srrs return (NULL); 3690163953Srrs } 3691163953Srrs } 3692163953Srrs num_chunks++; 3693163953Srrs /* Save off the last place we got a control from */ 3694163953Srrs if (stcb != NULL) { 3695163953Srrs if ((*netp != NULL) || (ch->chunk_type == SCTP_ASCONF)) { 3696163953Srrs /* 3697163953Srrs * allow last_control to be NULL if 3698163953Srrs * ASCONF... ASCONF processing will find the 3699163953Srrs * right net later 3700163953Srrs */ 3701163953Srrs stcb->asoc.last_control_chunk_from = *netp; 3702163953Srrs } 3703163953Srrs } 3704163953Srrs#ifdef SCTP_AUDITING_ENABLED 3705163953Srrs sctp_audit_log(0xB0, ch->chunk_type); 3706163953Srrs#endif 3707163953Srrs 3708163953Srrs /* check to see if this chunk required auth, but isn't */ 3709163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 3710163953Srrs sctp_auth_is_required_chunk(ch->chunk_type, 3711163953Srrs stcb->asoc.local_auth_chunks) && 3712163953Srrs !stcb->asoc.authenticated) { 3713163953Srrs /* "silently" ignore */ 3714163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 3715163953Srrs goto next_chunk; 3716163953Srrs } 3717163953Srrs switch (ch->chunk_type) { 3718163953Srrs case SCTP_INITIATION: 3719163953Srrs /* must be first and only chunk */ 3720163953Srrs#ifdef SCTP_DEBUG 3721163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3722163953Srrs printf("SCTP_INIT\n"); 3723163953Srrs } 3724163953Srrs#endif /* SCTP_DEBUG */ 3725163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3726163953Srrs /* We are not interested anymore? */ 3727163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3728163953Srrs /* 3729163953Srrs * collision case where we are 3730163953Srrs * sending to them too 3731163953Srrs */ 3732163953Srrs ; 3733163953Srrs } else { 3734163953Srrs if (locked_tcb) 3735163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3736163953Srrs *offset = length; 3737163953Srrs return (NULL); 3738163953Srrs } 3739163953Srrs } 3740163953Srrs if ((num_chunks > 1) || 3741163953Srrs (sctp_strict_init && (length - *offset > SCTP_SIZE32(chk_length)))) { 3742163953Srrs *offset = length; 3743163953Srrs if (locked_tcb) 3744163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3745163953Srrs return (NULL); 3746163953Srrs } 3747163953Srrs if ((stcb != NULL) && 3748163953Srrs (SCTP_GET_STATE(&stcb->asoc) == 3749163953Srrs SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3750163953Srrs sctp_send_shutdown_ack(stcb, 3751163953Srrs stcb->asoc.primary_destination); 3752163953Srrs *offset = length; 3753163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3754163953Srrs if (locked_tcb) 3755163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3756163953Srrs return (NULL); 3757163953Srrs } 3758163953Srrs sctp_handle_init(m, iphlen, *offset, sh, 3759163953Srrs (struct sctp_init_chunk *)ch, inp, stcb, *netp); 3760163953Srrs *offset = length; 3761163953Srrs if (locked_tcb) 3762163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3763163953Srrs return (NULL); 3764163953Srrs break; 3765163953Srrs case SCTP_INITIATION_ACK: 3766163953Srrs /* must be first and only chunk */ 3767163953Srrs#ifdef SCTP_DEBUG 3768163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3769163953Srrs printf("SCTP_INIT-ACK\n"); 3770163953Srrs } 3771163953Srrs#endif /* SCTP_DEBUG */ 3772163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3773163953Srrs /* We are not interested anymore */ 3774163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3775163953Srrs ; 3776163953Srrs } else { 3777163953Srrs if (locked_tcb) 3778163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3779163953Srrs *offset = length; 3780163953Srrs if (stcb) { 3781165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_26); 3782163953Srrs } 3783163953Srrs return (NULL); 3784163953Srrs } 3785163953Srrs } 3786163953Srrs if ((num_chunks > 1) || 3787163953Srrs (sctp_strict_init && (length - *offset > SCTP_SIZE32(chk_length)))) { 3788163953Srrs *offset = length; 3789163953Srrs if (locked_tcb) 3790163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3791163953Srrs return (NULL); 3792163953Srrs } 3793163953Srrs ret = sctp_handle_init_ack(m, iphlen, *offset, sh, 3794163953Srrs (struct sctp_init_ack_chunk *)ch, stcb, *netp); 3795163953Srrs /* 3796163953Srrs * Special case, I must call the output routine to 3797163953Srrs * get the cookie echoed 3798163953Srrs */ 3799163953Srrs if ((stcb) && ret == 0) 3800163953Srrs sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3801163953Srrs *offset = length; 3802163953Srrs if (locked_tcb) 3803163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3804163953Srrs return (NULL); 3805163953Srrs break; 3806163953Srrs case SCTP_SELECTIVE_ACK: 3807163953Srrs#ifdef SCTP_DEBUG 3808163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3809163953Srrs printf("SCTP_SACK\n"); 3810163953Srrs } 3811163953Srrs#endif /* SCTP_DEBUG */ 3812163953Srrs SCTP_STAT_INCR(sctps_recvsacks); 3813163953Srrs { 3814163953Srrs struct sctp_sack_chunk *sack; 3815163953Srrs int abort_now = 0; 3816163953Srrs uint32_t a_rwnd, cum_ack; 3817163953Srrs uint16_t num_seg; 3818163953Srrs int nonce_sum_flag; 3819163953Srrs 3820163953Srrs sack = (struct sctp_sack_chunk *)ch; 3821163953Srrs 3822163953Srrs nonce_sum_flag = ch->chunk_flags & SCTP_SACK_NONCE_SUM; 3823163953Srrs cum_ack = ntohl(sack->sack.cum_tsn_ack); 3824163953Srrs num_seg = ntohs(sack->sack.num_gap_ack_blks); 3825163953Srrs a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd); 3826163953Srrs stcb->asoc.seen_a_sack_this_pkt = 1; 3827163953Srrs if ((stcb->asoc.pr_sctp_cnt == 0) && 3828163953Srrs (num_seg == 0) && 3829163953Srrs ((compare_with_wrap(cum_ack, stcb->asoc.last_acked_seq, MAX_TSN)) || 3830163953Srrs (cum_ack == stcb->asoc.last_acked_seq)) && 3831163953Srrs (stcb->asoc.saw_sack_with_frags == 0) && 3832163953Srrs (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) 3833163953Srrs ) { 3834163953Srrs /* 3835163953Srrs * We have a SIMPLE sack having no 3836163953Srrs * prior segments and data on sent 3837163953Srrs * queue to be acked.. Use the 3838163953Srrs * faster path sack processing. We 3839163953Srrs * also allow window update sacks 3840163953Srrs * with no missing segments to go 3841163953Srrs * this way too. 3842163953Srrs */ 3843163953Srrs sctp_express_handle_sack(stcb, cum_ack, a_rwnd, nonce_sum_flag, &abort_now); 3844163953Srrs } else { 3845163953Srrs sctp_handle_sack(sack, stcb, *netp, &abort_now); 3846163953Srrs } 3847163953Srrs if (abort_now) { 3848163953Srrs /* ABORT signal from sack processing */ 3849163953Srrs *offset = length; 3850163953Srrs return (NULL); 3851163953Srrs } 3852163953Srrs } 3853163953Srrs break; 3854163953Srrs case SCTP_HEARTBEAT_REQUEST: 3855163953Srrs#ifdef SCTP_DEBUG 3856163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3857163953Srrs printf("SCTP_HEARTBEAT\n"); 3858163953Srrs } 3859163953Srrs#endif /* SCTP_DEBUG */ 3860163953Srrs SCTP_STAT_INCR(sctps_recvheartbeat); 3861163953Srrs sctp_send_heartbeat_ack(stcb, m, *offset, chk_length, 3862163953Srrs *netp); 3863163953Srrs 3864163953Srrs /* He's alive so give him credit */ 3865163953Srrs stcb->asoc.overall_error_count = 0; 3866163953Srrs break; 3867163953Srrs case SCTP_HEARTBEAT_ACK: 3868163953Srrs#ifdef SCTP_DEBUG 3869163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3870163953Srrs printf("SCTP_HEARTBEAT-ACK\n"); 3871163953Srrs } 3872163953Srrs#endif /* SCTP_DEBUG */ 3873163953Srrs 3874163953Srrs /* He's alive so give him credit */ 3875163953Srrs stcb->asoc.overall_error_count = 0; 3876163953Srrs SCTP_STAT_INCR(sctps_recvheartbeatack); 3877163953Srrs sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch, 3878163953Srrs stcb, *netp); 3879163953Srrs break; 3880163953Srrs case SCTP_ABORT_ASSOCIATION: 3881163953Srrs#ifdef SCTP_DEBUG 3882163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3883163953Srrs printf("SCTP_ABORT\n"); 3884163953Srrs } 3885163953Srrs#endif /* SCTP_DEBUG */ 3886163953Srrs sctp_handle_abort((struct sctp_abort_chunk *)ch, 3887163953Srrs stcb, *netp); 3888163953Srrs *offset = length; 3889163953Srrs return (NULL); 3890163953Srrs break; 3891163953Srrs case SCTP_SHUTDOWN: 3892163953Srrs#ifdef SCTP_DEBUG 3893163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3894163953Srrs printf("SCTP_SHUTDOWN\n"); 3895163953Srrs } 3896163953Srrs#endif /* SCTP_DEBUG */ 3897163953Srrs { 3898163953Srrs int abort_flag = 0; 3899163953Srrs 3900163953Srrs sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch, 3901163953Srrs stcb, *netp, &abort_flag); 3902163953Srrs if (abort_flag) { 3903163953Srrs *offset = length; 3904163953Srrs return (NULL); 3905163953Srrs } 3906163953Srrs } 3907163953Srrs break; 3908163953Srrs case SCTP_SHUTDOWN_ACK: 3909163953Srrs#ifdef SCTP_DEBUG 3910163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3911163953Srrs printf("SCTP_SHUTDOWN-ACK\n"); 3912163953Srrs } 3913163953Srrs#endif /* SCTP_DEBUG */ 3914163953Srrs sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp); 3915163953Srrs *offset = length; 3916163953Srrs return (NULL); 3917163953Srrs break; 3918163953Srrs case SCTP_OPERATION_ERROR: 3919163953Srrs#ifdef SCTP_DEBUG 3920163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3921163953Srrs printf("SCTP_OP-ERR\n"); 3922163953Srrs } 3923163953Srrs#endif /* SCTP_DEBUG */ 3924163953Srrs if (sctp_handle_error(ch, stcb, *netp) < 0) { 3925163953Srrs *offset = length; 3926163953Srrs return (NULL); 3927163953Srrs } 3928163953Srrs break; 3929163953Srrs case SCTP_COOKIE_ECHO: 3930163953Srrs#ifdef SCTP_DEBUG 3931163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3932163953Srrs printf("SCTP_COOKIE-ECHO stcb is %p\n", stcb); 3933163953Srrs } 3934163953Srrs#endif /* SCTP_DEBUG */ 3935163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3936163953Srrs ; 3937163953Srrs } else { 3938163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) && 3939163953Srrs (stcb == NULL)) { 3940163953Srrs /* We are not interested anymore */ 3941163953Srrs *offset = length; 3942163953Srrs return (NULL); 3943163953Srrs } 3944163953Srrs } 3945163953Srrs /* 3946163953Srrs * First are we accepting? We do this again here 3947163953Srrs * since it is possible that a previous endpoint WAS 3948163953Srrs * listening responded to a INIT-ACK and then 3949163953Srrs * closed. We opened and bound.. and are now no 3950163953Srrs * longer listening. 3951163953Srrs */ 3952163953Srrs if (inp->sctp_socket->so_qlimit == 0) { 3953163953Srrs if ((stcb) && (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3954163953Srrs /* 3955163953Srrs * special case, is this a retran'd 3956163953Srrs * COOKIE-ECHO or a restarting assoc 3957163953Srrs * that is a peeled off or 3958163953Srrs * one-to-one style socket. 3959163953Srrs */ 3960163953Srrs goto process_cookie_anyway; 3961163953Srrs } 3962163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, 3963163953Srrs NULL); 3964163953Srrs *offset = length; 3965163953Srrs return (NULL); 3966163953Srrs } else if (inp->sctp_socket->so_qlimit) { 3967163953Srrs /* we are accepting so check limits like TCP */ 3968163953Srrs if (inp->sctp_socket->so_qlen > 3969163953Srrs inp->sctp_socket->so_qlimit) { 3970163953Srrs /* no space */ 3971163953Srrs struct mbuf *oper; 3972163953Srrs struct sctp_paramhdr *phdr; 3973163953Srrs 3974163953Srrs if (sctp_abort_if_one_2_one_hits_limit) { 3975163953Srrs oper = NULL; 3976163953Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3977165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 3978163953Srrs if (oper) { 3979165647Srrs SCTP_BUF_LEN(oper) = 3980163953Srrs sizeof(struct sctp_paramhdr); 3981163953Srrs phdr = mtod(oper, 3982163953Srrs struct sctp_paramhdr *); 3983163953Srrs phdr->param_type = 3984163953Srrs htons(SCTP_CAUSE_OUT_OF_RESC); 3985163953Srrs phdr->param_length = 3986163953Srrs htons(sizeof(struct sctp_paramhdr)); 3987163953Srrs } 3988163953Srrs sctp_abort_association(inp, stcb, m, 3989163953Srrs iphlen, sh, oper); 3990163953Srrs } 3991163953Srrs *offset = length; 3992163953Srrs return (NULL); 3993163953Srrs } 3994163953Srrs } 3995163953Srrs process_cookie_anyway: 3996163953Srrs { 3997163953Srrs struct mbuf *ret_buf; 3998165220Srrs struct sctp_inpcb *linp; 3999163953Srrs 4000165220Srrs if (stcb) 4001165220Srrs linp = NULL; 4002165220Srrs else 4003165220Srrs linp = inp; 4004165220Srrs 4005165220Srrs if (linp) 4006165220Srrs SCTP_ASOC_CREATE_LOCK(linp); 4007163953Srrs ret_buf = 4008163953Srrs sctp_handle_cookie_echo(m, iphlen, 4009163953Srrs *offset, sh, 4010163953Srrs (struct sctp_cookie_echo_chunk *)ch, 4011163953Srrs &inp, &stcb, netp, 4012163953Srrs auth_skipped, 4013163953Srrs auth_offset, 4014165220Srrs auth_len, 4015165220Srrs &locked_tcb); 4016165220Srrs if (linp) 4017165220Srrs SCTP_ASOC_CREATE_UNLOCK(linp); 4018163953Srrs if (ret_buf == NULL) { 4019163953Srrs if (locked_tcb) { 4020163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4021163953Srrs } 4022163953Srrs#ifdef SCTP_DEBUG 4023163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4024163953Srrs printf("GAK, null buffer\n"); 4025163953Srrs } 4026163953Srrs#endif /* SCTP_DEBUG */ 4027163953Srrs auth_skipped = 0; 4028163953Srrs *offset = length; 4029163953Srrs return (NULL); 4030163953Srrs } 4031163953Srrs /* if AUTH skipped, see if it verified... */ 4032163953Srrs if (auth_skipped) { 4033163953Srrs got_auth = 1; 4034163953Srrs auth_skipped = 0; 4035163953Srrs } 4036163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 4037163953Srrs /* 4038163953Srrs * Restart the timer if we have 4039163953Srrs * pending data 4040163953Srrs */ 4041163953Srrs struct sctp_tmit_chunk *chk; 4042163953Srrs 4043163953Srrs chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 4044163953Srrs if (chk) { 4045163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, 4046163953Srrs stcb->sctp_ep, stcb, 4047163953Srrs chk->whoTo); 4048163953Srrs } 4049163953Srrs } 4050163953Srrs } 4051163953Srrs break; 4052163953Srrs case SCTP_COOKIE_ACK: 4053163953Srrs#ifdef SCTP_DEBUG 4054163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4055163953Srrs printf("SCTP_COOKIE-ACK\n"); 4056163953Srrs } 4057163953Srrs#endif /* SCTP_DEBUG */ 4058163953Srrs 4059163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4060163953Srrs /* We are not interested anymore */ 4061163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 4062163953Srrs ; 4063163953Srrs } else { 4064165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27); 4065163953Srrs *offset = length; 4066163953Srrs return (NULL); 4067163953Srrs } 4068163953Srrs } 4069163953Srrs /* He's alive so give him credit */ 4070163953Srrs stcb->asoc.overall_error_count = 0; 4071163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp); 4072163953Srrs break; 4073163953Srrs case SCTP_ECN_ECHO: 4074163953Srrs#ifdef SCTP_DEBUG 4075163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4076163953Srrs printf("SCTP_ECN-ECHO\n"); 4077163953Srrs } 4078163953Srrs#endif /* SCTP_DEBUG */ 4079163953Srrs /* He's alive so give him credit */ 4080163953Srrs stcb->asoc.overall_error_count = 0; 4081163953Srrs sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, 4082163953Srrs stcb); 4083163953Srrs break; 4084163953Srrs case SCTP_ECN_CWR: 4085163953Srrs#ifdef SCTP_DEBUG 4086163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4087163953Srrs printf("SCTP_ECN-CWR\n"); 4088163953Srrs } 4089163953Srrs#endif /* SCTP_DEBUG */ 4090163953Srrs /* He's alive so give him credit */ 4091163953Srrs stcb->asoc.overall_error_count = 0; 4092163953Srrs 4093163953Srrs sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb); 4094163953Srrs break; 4095163953Srrs case SCTP_SHUTDOWN_COMPLETE: 4096163953Srrs#ifdef SCTP_DEBUG 4097163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4098163953Srrs printf("SCTP_SHUTDOWN-COMPLETE\n"); 4099163953Srrs } 4100163953Srrs#endif /* SCTP_DEBUG */ 4101163953Srrs /* must be first and only chunk */ 4102163953Srrs if ((num_chunks > 1) || 4103163953Srrs (length - *offset > SCTP_SIZE32(chk_length))) { 4104163953Srrs *offset = length; 4105163953Srrs if (locked_tcb) 4106163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4107163953Srrs 4108163953Srrs return (NULL); 4109163953Srrs } 4110163953Srrs sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch, 4111163953Srrs stcb, *netp); 4112163953Srrs *offset = length; 4113163953Srrs return (NULL); 4114163953Srrs break; 4115163953Srrs case SCTP_ASCONF: 4116163953Srrs#ifdef SCTP_DEBUG 4117163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4118163953Srrs printf("SCTP_ASCONF\n"); 4119163953Srrs } 4120163953Srrs#endif /* SCTP_DEBUG */ 4121163953Srrs /* He's alive so give him credit */ 4122163953Srrs stcb->asoc.overall_error_count = 0; 4123163953Srrs 4124163953Srrs sctp_handle_asconf(m, *offset, 4125163953Srrs (struct sctp_asconf_chunk *)ch, stcb); 4126163953Srrs break; 4127163953Srrs case SCTP_ASCONF_ACK: 4128163953Srrs#ifdef SCTP_DEBUG 4129163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4130163953Srrs printf("SCTP_ASCONF-ACK\n"); 4131163953Srrs } 4132163953Srrs#endif /* SCTP_DEBUG */ 4133163953Srrs /* He's alive so give him credit */ 4134163953Srrs stcb->asoc.overall_error_count = 0; 4135163953Srrs 4136163953Srrs sctp_handle_asconf_ack(m, *offset, 4137163953Srrs (struct sctp_asconf_ack_chunk *)ch, stcb, *netp); 4138163953Srrs break; 4139163953Srrs case SCTP_FORWARD_CUM_TSN: 4140163953Srrs#ifdef SCTP_DEBUG 4141163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4142163953Srrs printf("SCTP_FWD-TSN\n"); 4143163953Srrs } 4144163953Srrs#endif /* SCTP_DEBUG */ 4145163953Srrs /* He's alive so give him credit */ 4146163953Srrs { 4147163953Srrs int abort_flag = 0; 4148163953Srrs 4149163953Srrs stcb->asoc.overall_error_count = 0; 4150163953Srrs *fwd_tsn_seen = 1; 4151163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4152163953Srrs /* We are not interested anymore */ 4153165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28); 4154163953Srrs *offset = length; 4155163953Srrs return (NULL); 4156163953Srrs } 4157163953Srrs sctp_handle_forward_tsn(stcb, 4158163953Srrs (struct sctp_forward_tsn_chunk *)ch, &abort_flag); 4159163953Srrs if (abort_flag) { 4160163953Srrs *offset = length; 4161163953Srrs return (NULL); 4162163953Srrs } else { 4163163953Srrs stcb->asoc.overall_error_count = 0; 4164163953Srrs } 4165163953Srrs 4166163953Srrs } 4167163953Srrs break; 4168163953Srrs case SCTP_STREAM_RESET: 4169163953Srrs#ifdef SCTP_DEBUG 4170163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4171163953Srrs printf("SCTP_STREAM_RESET\n"); 4172163953Srrs } 4173163953Srrs#endif /* SCTP_DEBUG */ 4174163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4175163953Srrs chk_length, chunk_buf); 4176163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4177163953Srrs /* We are not interested anymore */ 4178165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_29); 4179163953Srrs *offset = length; 4180163953Srrs return (NULL); 4181163953Srrs } 4182163953Srrs if (stcb->asoc.peer_supports_strreset == 0) { 4183163953Srrs /* 4184163953Srrs * hmm, peer should have announced this, but 4185163953Srrs * we will turn it on since he is sending us 4186163953Srrs * a stream reset. 4187163953Srrs */ 4188163953Srrs stcb->asoc.peer_supports_strreset = 1; 4189163953Srrs } 4190163953Srrs if (sctp_handle_stream_reset(stcb, (struct sctp_stream_reset_out_req *)ch)) { 4191163953Srrs /* stop processing */ 4192163953Srrs *offset = length; 4193163953Srrs return (NULL); 4194163953Srrs } 4195163953Srrs break; 4196163953Srrs case SCTP_PACKET_DROPPED: 4197163953Srrs#ifdef SCTP_DEBUG 4198163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4199163953Srrs printf("SCTP_PACKET_DROPPED\n"); 4200163953Srrs } 4201163953Srrs#endif /* SCTP_DEBUG */ 4202163953Srrs /* re-get it all please */ 4203163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4204163953Srrs chk_length, chunk_buf); 4205163953Srrs 4206163953Srrs sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch, 4207163953Srrs stcb, *netp); 4208163953Srrs 4209163953Srrs break; 4210163953Srrs 4211163953Srrs case SCTP_AUTHENTICATION: 4212163953Srrs#ifdef SCTP_DEBUG 4213163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4214163953Srrs printf("SCTP_AUTHENTICATION\n"); 4215163953Srrs } 4216163953Srrs#endif /* SCTP_DEBUG */ 4217163953Srrs if (sctp_auth_disable) 4218163953Srrs goto unknown_chunk; 4219163953Srrs 4220163953Srrs if (stcb == NULL) { 4221163953Srrs /* save the first AUTH for later processing */ 4222163953Srrs if (auth_skipped == 0) { 4223163953Srrs auth_offset = *offset; 4224163953Srrs auth_len = chk_length; 4225163953Srrs auth_skipped = 1; 4226163953Srrs } 4227163953Srrs /* skip this chunk (temporarily) */ 4228163953Srrs goto next_chunk; 4229163953Srrs } 4230163953Srrs if (got_auth == 1) { 4231163953Srrs /* skip this chunk... it's already auth'd */ 4232163953Srrs goto next_chunk; 4233163953Srrs } 4234163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4235163953Srrs chk_length, chunk_buf); 4236163953Srrs got_auth = 1; 4237163953Srrs if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, 4238163953Srrs m, *offset)) { 4239163953Srrs /* auth HMAC failed so dump the packet */ 4240163953Srrs *offset = length; 4241163953Srrs return (stcb); 4242163953Srrs } else { 4243163953Srrs /* remaining chunks are HMAC checked */ 4244163953Srrs stcb->asoc.authenticated = 1; 4245163953Srrs } 4246163953Srrs break; 4247163953Srrs 4248163953Srrs default: 4249163953Srrs unknown_chunk: 4250163953Srrs /* it's an unknown chunk! */ 4251163953Srrs if ((ch->chunk_type & 0x40) && (stcb != NULL)) { 4252163953Srrs struct mbuf *mm; 4253163953Srrs struct sctp_paramhdr *phd; 4254163953Srrs 4255163953Srrs mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 4256165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 4257163953Srrs if (mm) { 4258163953Srrs phd = mtod(mm, struct sctp_paramhdr *); 4259163953Srrs /* 4260163953Srrs * We cheat and use param type since 4261163953Srrs * we did not bother to define a 4262163953Srrs * error cause struct. They are the 4263163953Srrs * same basic format with different 4264163953Srrs * names. 4265163953Srrs */ 4266163953Srrs phd->param_type = htons(SCTP_CAUSE_UNRECOG_CHUNK); 4267163953Srrs phd->param_length = htons(chk_length + sizeof(*phd)); 4268165647Srrs SCTP_BUF_LEN(mm) = sizeof(*phd); 4269165647Srrs SCTP_BUF_NEXT(mm) = sctp_m_copym(m, *offset, SCTP_SIZE32(chk_length), 4270163953Srrs M_DONTWAIT); 4271165647Srrs if (SCTP_BUF_NEXT(mm)) { 4272163953Srrs sctp_queue_op_err(stcb, mm); 4273163953Srrs } else { 4274163953Srrs sctp_m_freem(mm); 4275163953Srrs } 4276163953Srrs } 4277163953Srrs } 4278163953Srrs if ((ch->chunk_type & 0x80) == 0) { 4279163953Srrs /* discard this packet */ 4280163953Srrs *offset = length; 4281163953Srrs return (stcb); 4282163953Srrs } /* else skip this bad chunk and continue... */ 4283163953Srrs break; 4284163953Srrs } /* switch (ch->chunk_type) */ 4285163953Srrs 4286163953Srrs 4287163953Srrsnext_chunk: 4288163953Srrs /* get the next chunk */ 4289163953Srrs *offset += SCTP_SIZE32(chk_length); 4290163953Srrs if (*offset >= length) { 4291163953Srrs /* no more data left in the mbuf chain */ 4292163953Srrs break; 4293163953Srrs } 4294163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4295163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 4296163953Srrs if (ch == NULL) { 4297163953Srrs if (locked_tcb) 4298163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4299163953Srrs *offset = length; 4300163953Srrs return (NULL); 4301163953Srrs } 4302163953Srrs } /* while */ 4303163953Srrs return (stcb); 4304163953Srrs} 4305163953Srrs 4306163953Srrs 4307163953Srrs/* 4308163953Srrs * Process the ECN bits we have something set so we must look to see if it is 4309163953Srrs * ECN(0) or ECN(1) or CE 4310163953Srrs */ 4311163953Srrsstatic __inline void 4312163953Srrssctp_process_ecn_marked_a(struct sctp_tcb *stcb, struct sctp_nets *net, 4313163953Srrs uint8_t ecn_bits) 4314163953Srrs{ 4315163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4316163953Srrs ; 4317163953Srrs } else if ((ecn_bits & SCTP_ECT1_BIT) == SCTP_ECT1_BIT) { 4318163953Srrs /* 4319163953Srrs * we only add to the nonce sum for ECT1, ECT0 does not 4320163953Srrs * change the NS bit (that we have yet to find a way to send 4321163953Srrs * it yet). 4322163953Srrs */ 4323163953Srrs 4324163953Srrs /* ECN Nonce stuff */ 4325163953Srrs stcb->asoc.receiver_nonce_sum++; 4326163953Srrs stcb->asoc.receiver_nonce_sum &= SCTP_SACK_NONCE_SUM; 4327163953Srrs 4328163953Srrs /* 4329163953Srrs * Drag up the last_echo point if cumack is larger since we 4330163953Srrs * don't want the point falling way behind by more than 4331163953Srrs * 2^^31 and then having it be incorrect. 4332163953Srrs */ 4333163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4334163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4335163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4336163953Srrs } 4337163953Srrs } else if ((ecn_bits & SCTP_ECT0_BIT) == SCTP_ECT0_BIT) { 4338163953Srrs /* 4339163953Srrs * Drag up the last_echo point if cumack is larger since we 4340163953Srrs * don't want the point falling way behind by more than 4341163953Srrs * 2^^31 and then having it be incorrect. 4342163953Srrs */ 4343163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4344163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4345163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4346163953Srrs } 4347163953Srrs } 4348163953Srrs} 4349163953Srrs 4350163953Srrsstatic __inline void 4351163953Srrssctp_process_ecn_marked_b(struct sctp_tcb *stcb, struct sctp_nets *net, 4352163953Srrs uint32_t high_tsn, uint8_t ecn_bits) 4353163953Srrs{ 4354163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4355163953Srrs /* 4356163953Srrs * we possibly must notify the sender that a congestion 4357163953Srrs * window reduction is in order. We do this by adding a ECNE 4358163953Srrs * chunk to the output chunk queue. The incoming CWR will 4359163953Srrs * remove this chunk. 4360163953Srrs */ 4361163953Srrs if (compare_with_wrap(high_tsn, stcb->asoc.last_echo_tsn, 4362163953Srrs MAX_TSN)) { 4363163953Srrs /* Yep, we need to add a ECNE */ 4364163953Srrs sctp_send_ecn_echo(stcb, net, high_tsn); 4365163953Srrs stcb->asoc.last_echo_tsn = high_tsn; 4366163953Srrs } 4367163953Srrs } 4368163953Srrs} 4369163953Srrs 4370163953Srrs/* 4371163953Srrs * common input chunk processing (v4 and v6) 4372163953Srrs */ 4373163953Srrsint 4374163953Srrssctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, 4375163953Srrs int length, struct sctphdr *sh, struct sctp_chunkhdr *ch, 4376163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 4377163953Srrs uint8_t ecn_bits) 4378163953Srrs{ 4379163953Srrs /* 4380163953Srrs * Control chunk processing 4381163953Srrs */ 4382163953Srrs uint32_t high_tsn; 4383163953Srrs int fwd_tsn_seen = 0, data_processed = 0; 4384163953Srrs struct mbuf *m = *mm; 4385163953Srrs int abort_flag = 0; 4386163953Srrs int un_sent; 4387163953Srrs 4388163953Srrs SCTP_STAT_INCR(sctps_recvdatagrams); 4389163953Srrs#ifdef SCTP_AUDITING_ENABLED 4390163953Srrs sctp_audit_log(0xE0, 1); 4391163953Srrs sctp_auditing(0, inp, stcb, net); 4392163953Srrs#endif 4393163953Srrs 4394163953Srrs#ifdef SCTP_DEBUG 4395163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4396163996Srrs printf("Ok, Common input processing called, m:%p iphlen:%d offset:%d\n", 4397163996Srrs m, iphlen, offset); 4398163953Srrs } 4399163953Srrs#endif /* SCTP_DEBUG */ 4400163953Srrs 4401163953Srrs if (stcb) { 4402163953Srrs /* always clear this before beginning a packet */ 4403163953Srrs stcb->asoc.authenticated = 0; 4404163953Srrs stcb->asoc.seen_a_sack_this_pkt = 0; 4405163953Srrs } 4406163953Srrs if (IS_SCTP_CONTROL(ch)) { 4407163953Srrs /* process the control portion of the SCTP packet */ 4408163953Srrs stcb = sctp_process_control(m, iphlen, &offset, length, sh, ch, 4409163953Srrs inp, stcb, &net, &fwd_tsn_seen); 4410163953Srrs if (stcb) { 4411163953Srrs /* 4412163953Srrs * This covers us if the cookie-echo was there and 4413163953Srrs * it changes our INP. 4414163953Srrs */ 4415163953Srrs inp = stcb->sctp_ep; 4416163953Srrs } 4417163953Srrs } else { 4418163953Srrs /* 4419163953Srrs * no control chunks, so pre-process DATA chunks (these 4420163953Srrs * checks are taken care of by control processing) 4421163953Srrs */ 4422163953Srrs 4423163953Srrs /* 4424163953Srrs * if DATA only packet, and auth is required, then punt... 4425163953Srrs * can't have authenticated without any AUTH (control) 4426163953Srrs * chunks 4427163953Srrs */ 4428163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 4429163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4430163953Srrs stcb->asoc.local_auth_chunks)) { 4431163953Srrs /* "silently" ignore */ 4432163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4433163953Srrs SCTP_TCB_UNLOCK(stcb); 4434163953Srrs return (1); 4435163953Srrs } 4436163953Srrs if (stcb == NULL) { 4437163953Srrs /* out of the blue DATA chunk */ 4438163953Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL); 4439163953Srrs return (1); 4440163953Srrs } 4441163953Srrs if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) { 4442163953Srrs /* v_tag mismatch! */ 4443163953Srrs SCTP_STAT_INCR(sctps_badvtag); 4444163953Srrs SCTP_TCB_UNLOCK(stcb); 4445163953Srrs return (1); 4446163953Srrs } 4447163953Srrs } 4448163953Srrs 4449163953Srrs if (stcb == NULL) { 4450163953Srrs /* 4451163953Srrs * no valid TCB for this packet, or we found it's a bad 4452163953Srrs * packet while processing control, or we're done with this 4453163953Srrs * packet (done or skip rest of data), so we drop it... 4454163953Srrs */ 4455163953Srrs return (1); 4456163953Srrs } 4457163953Srrs /* 4458163953Srrs * DATA chunk processing 4459163953Srrs */ 4460163953Srrs /* plow through the data chunks while length > offset */ 4461163953Srrs 4462163953Srrs /* 4463163953Srrs * Rest should be DATA only. Check authentication state if AUTH for 4464163953Srrs * DATA is required. 4465163953Srrs */ 4466165220Srrs if ((length > offset) && (stcb != NULL) && !sctp_auth_disable && 4467163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4468163953Srrs stcb->asoc.local_auth_chunks) && 4469163953Srrs !stcb->asoc.authenticated) { 4470163953Srrs /* "silently" ignore */ 4471163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4472163953Srrs#ifdef SCTP_DEBUG 4473163953Srrs if (sctp_debug_on & SCTP_DEBUG_AUTH1) 4474163953Srrs printf("Data chunk requires AUTH, skipped\n"); 4475163953Srrs#endif 4476165220Srrs goto trigger_send; 4477163953Srrs } 4478163953Srrs if (length > offset) { 4479163953Srrs int retval; 4480163953Srrs 4481163953Srrs /* 4482163953Srrs * First check to make sure our state is correct. We would 4483163953Srrs * not get here unless we really did have a tag, so we don't 4484163953Srrs * abort if this happens, just dump the chunk silently. 4485163953Srrs */ 4486163953Srrs switch (SCTP_GET_STATE(&stcb->asoc)) { 4487163953Srrs case SCTP_STATE_COOKIE_ECHOED: 4488163953Srrs /* 4489163953Srrs * we consider data with valid tags in this state 4490163953Srrs * shows us the cookie-ack was lost. Imply it was 4491163953Srrs * there. 4492163953Srrs */ 4493163953Srrs stcb->asoc.overall_error_count = 0; 4494163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net); 4495163953Srrs break; 4496163953Srrs case SCTP_STATE_COOKIE_WAIT: 4497163953Srrs /* 4498163953Srrs * We consider OOTB any data sent during asoc setup. 4499163953Srrs */ 4500163953Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL); 4501163953Srrs SCTP_TCB_UNLOCK(stcb); 4502163953Srrs return (1); 4503163953Srrs break; 4504163953Srrs case SCTP_STATE_EMPTY: /* should not happen */ 4505163953Srrs case SCTP_STATE_INUSE: /* should not happen */ 4506163953Srrs case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */ 4507163953Srrs case SCTP_STATE_SHUTDOWN_ACK_SENT: 4508163953Srrs default: 4509163953Srrs SCTP_TCB_UNLOCK(stcb); 4510163953Srrs return (1); 4511163953Srrs break; 4512163953Srrs case SCTP_STATE_OPEN: 4513163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 4514163953Srrs break; 4515163953Srrs } 4516163953Srrs /* take care of ECN, part 1. */ 4517163953Srrs if (stcb->asoc.ecn_allowed && 4518163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4519163953Srrs sctp_process_ecn_marked_a(stcb, net, ecn_bits); 4520163953Srrs } 4521163953Srrs /* plow through the data chunks while length > offset */ 4522163953Srrs retval = sctp_process_data(mm, iphlen, &offset, length, sh, 4523163953Srrs inp, stcb, net, &high_tsn); 4524163953Srrs if (retval == 2) { 4525163953Srrs /* 4526163953Srrs * The association aborted, NO UNLOCK needed since 4527163953Srrs * the association is destroyed. 4528163953Srrs */ 4529163953Srrs return (0); 4530163953Srrs } 4531163953Srrs data_processed = 1; 4532163953Srrs if (retval == 0) { 4533163953Srrs /* take care of ecn part 2. */ 4534163953Srrs if (stcb->asoc.ecn_allowed && 4535163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4536163953Srrs sctp_process_ecn_marked_b(stcb, net, high_tsn, 4537163953Srrs ecn_bits); 4538163953Srrs } 4539163953Srrs } 4540163953Srrs /* 4541163953Srrs * Anything important needs to have been m_copy'ed in 4542163953Srrs * process_data 4543163953Srrs */ 4544163953Srrs } 4545163953Srrs if ((data_processed == 0) && (fwd_tsn_seen)) { 4546163953Srrs int was_a_gap = 0; 4547163953Srrs 4548163953Srrs if (compare_with_wrap(stcb->asoc.highest_tsn_inside_map, 4549163953Srrs stcb->asoc.cumulative_tsn, MAX_TSN)) { 4550163953Srrs /* there was a gap before this data was processed */ 4551163953Srrs was_a_gap = 1; 4552163953Srrs } 4553163953Srrs sctp_sack_check(stcb, 1, was_a_gap, &abort_flag); 4554163953Srrs if (abort_flag) { 4555163953Srrs /* Again, we aborted so NO UNLOCK needed */ 4556163953Srrs return (0); 4557163953Srrs } 4558163953Srrs } 4559163953Srrs /* trigger send of any chunks in queue... */ 4560165220Srrstrigger_send: 4561163953Srrs#ifdef SCTP_AUDITING_ENABLED 4562163953Srrs sctp_audit_log(0xE0, 2); 4563163953Srrs sctp_auditing(1, inp, stcb, net); 4564163953Srrs#endif 4565163953Srrs#ifdef SCTP_DEBUG 4566163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4567163953Srrs printf("Check for chunk output prw:%d tqe:%d tf=%d\n", 4568163953Srrs stcb->asoc.peers_rwnd, 4569163953Srrs TAILQ_EMPTY(&stcb->asoc.control_send_queue), 4570163953Srrs stcb->asoc.total_flight); 4571163953Srrs } 4572163953Srrs#endif 4573163953Srrs un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 4574163953Srrs 4575163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue) || 4576163953Srrs ((un_sent) && 4577163953Srrs (stcb->asoc.peers_rwnd > 0 || 4578163953Srrs (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) { 4579163953Srrs#ifdef SCTP_DEBUG 4580163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4581163953Srrs printf("Calling chunk OUTPUT\n"); 4582163953Srrs } 4583163953Srrs#endif 4584163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 4585163953Srrs#ifdef SCTP_DEBUG 4586163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4587163953Srrs printf("chunk OUTPUT returns\n"); 4588163953Srrs } 4589163953Srrs#endif 4590163953Srrs } 4591163953Srrs#ifdef SCTP_AUDITING_ENABLED 4592163953Srrs sctp_audit_log(0xE0, 3); 4593163953Srrs sctp_auditing(2, inp, stcb, net); 4594163953Srrs#endif 4595163953Srrs SCTP_TCB_UNLOCK(stcb); 4596163953Srrs return (0); 4597163953Srrs} 4598163953Srrs 4599163953Srrsextern int sctp_no_csum_on_loopback; 4600163953Srrs 4601163953Srrs 4602165220Srrsint sctp_buf_index = 0; 4603165220Srrsuint8_t sctp_list_of_chunks[30000]; 4604165220Srrs 4605165220Srrs 4606163953Srrsvoid 4607165647Srrssctp_input(i_pak, off) 4608165647Srrs struct mbuf *i_pak; 4609163953Srrs int off; 4610163953Srrs 4611163953Srrs{ 4612163953Srrs#ifdef SCTP_MBUF_LOGGING 4613163953Srrs struct mbuf *mat; 4614163953Srrs 4615163953Srrs#endif 4616165647Srrs struct mbuf *m; 4617163953Srrs int iphlen; 4618163953Srrs int s; 4619163953Srrs uint8_t ecn_bits; 4620163953Srrs struct ip *ip; 4621163953Srrs struct sctphdr *sh; 4622163953Srrs struct sctp_inpcb *inp = NULL; 4623163953Srrs 4624163953Srrs uint32_t check, calc_check; 4625163953Srrs struct sctp_nets *net; 4626163953Srrs struct sctp_tcb *stcb = NULL; 4627163953Srrs struct sctp_chunkhdr *ch; 4628163953Srrs int refcount_up = 0; 4629163953Srrs int length, mlen, offset; 4630163953Srrs 4631163953Srrs 4632163953Srrs iphlen = off; 4633165647Srrs m = SCTP_HEADER_TO_CHAIN(i_pak); 4634163953Srrs net = NULL; 4635163953Srrs SCTP_STAT_INCR(sctps_recvpackets); 4636163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 4637163953Srrs 4638163953Srrs /* 4639163953Srrs * Strip IP options, we don't allow any in or out. 4640163953Srrs */ 4641163953Srrs#ifdef SCTP_MBUF_LOGGING 4642163953Srrs /* Log in any input mbufs */ 4643163953Srrs mat = m; 4644163953Srrs while (mat) { 4645165647Srrs if (SCTP_BUF_IS_EXTENDED(mat)) { 4646163953Srrs sctp_log_mb(mat, SCTP_MBUF_INPUT); 4647163953Srrs } 4648165647Srrs mat = SCTP_BUF_NEXT(mat); 4649163953Srrs } 4650163953Srrs#endif 4651163953Srrs if ((size_t)iphlen > sizeof(struct ip)) { 4652163953Srrs ip_stripoptions(m, (struct mbuf *)0); 4653163953Srrs iphlen = sizeof(struct ip); 4654163953Srrs } 4655163953Srrs /* 4656163953Srrs * Get IP, SCTP, and first chunk header together in first mbuf. 4657163953Srrs */ 4658163953Srrs ip = mtod(m, struct ip *); 4659163953Srrs offset = iphlen + sizeof(*sh) + sizeof(*ch); 4660165647Srrs if (SCTP_BUF_LEN(m) < offset) { 4661163953Srrs if ((m = m_pullup(m, offset)) == 0) { 4662163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4663163953Srrs return; 4664163953Srrs } 4665163953Srrs ip = mtod(m, struct ip *); 4666163953Srrs } 4667163953Srrs sh = (struct sctphdr *)((caddr_t)ip + iphlen); 4668163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(*sh)); 4669163953Srrs 4670163953Srrs /* SCTP does not allow broadcasts or multicasts */ 4671163953Srrs if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { 4672163953Srrs goto bad; 4673163953Srrs } 4674163953Srrs if (((ch->chunk_type == SCTP_INITIATION) || 4675163953Srrs (ch->chunk_type == SCTP_INITIATION_ACK) || 4676163953Srrs (ch->chunk_type == SCTP_COOKIE_ECHO)) && 4677165647Srrs (SCTP_IS_IT_BROADCAST(ip->ip_dst, i_pak))) { 4678163953Srrs /* 4679163953Srrs * We only look at broadcast if its a front state, All 4680163953Srrs * others we will not have a tcb for anyway. 4681163953Srrs */ 4682163953Srrs goto bad; 4683163953Srrs } 4684163953Srrs /* destination port of 0 is illegal, based on RFC2960. */ 4685163953Srrs if (sh->dest_port == 0) { 4686163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4687163953Srrs goto bad; 4688163953Srrs } 4689163953Srrs /* validate SCTP checksum */ 4690163953Srrs if ((sctp_no_csum_on_loopback == 0) || 4691165647Srrs SCTP_IS_IT_LOOPBACK(i_pak)) { 4692163953Srrs /* 4693163953Srrs * we do NOT validate things from the loopback if the sysctl 4694163953Srrs * is set to 1. 4695163953Srrs */ 4696163953Srrs check = sh->checksum; /* save incoming checksum */ 4697163953Srrs if ((check == 0) && (sctp_no_csum_on_loopback)) { 4698163953Srrs /* 4699163953Srrs * special hook for where we got a local address 4700163953Srrs * somehow routed across a non IFT_LOOP type 4701163953Srrs * interface 4702163953Srrs */ 4703163953Srrs if (ip->ip_src.s_addr == ip->ip_dst.s_addr) 4704163953Srrs goto sctp_skip_csum_4; 4705163953Srrs } 4706163953Srrs sh->checksum = 0; /* prepare for calc */ 4707163953Srrs calc_check = sctp_calculate_sum(m, &mlen, iphlen); 4708163953Srrs if (calc_check != check) { 4709163953Srrs#ifdef SCTP_DEBUG 4710163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4711163996Srrs printf("Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 4712163996Srrs calc_check, check, m, mlen, iphlen); 4713163953Srrs } 4714163953Srrs#endif 4715163953Srrs 4716163953Srrs stcb = sctp_findassociation_addr(m, iphlen, 4717163953Srrs offset - sizeof(*ch), 4718163953Srrs sh, ch, &inp, &net); 4719163953Srrs if ((inp) && (stcb)) { 4720163953Srrs sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 4721163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR); 4722163953Srrs } else if ((inp != NULL) && (stcb == NULL)) { 4723163953Srrs refcount_up = 1; 4724163953Srrs } 4725163953Srrs SCTP_STAT_INCR(sctps_badsum); 4726163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 4727163953Srrs goto bad; 4728163953Srrs } 4729163953Srrs sh->checksum = calc_check; 4730163953Srrs } else { 4731163953Srrssctp_skip_csum_4: 4732165647Srrs mlen = SCTP_HEADER_LEN(i_pak); 4733163953Srrs } 4734163953Srrs /* validate mbuf chain length with IP payload length */ 4735163953Srrs if (mlen < (ip->ip_len - iphlen)) { 4736163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4737163953Srrs goto bad; 4738165220Srrs } { 4739165220Srrs /* TEMP log the first chunk */ 4740165220Srrs int x; 4741165220Srrs 4742165220Srrs x = atomic_fetchadd_int(&sctp_buf_index, 1); 4743165220Srrs if (x > 30000) { 4744165220Srrs sctp_buf_index = 1; 4745165220Srrs x = 0;; 4746165220Srrs } 4747165220Srrs sctp_list_of_chunks[x] = ch->chunk_type; 4748163953Srrs } 4749163953Srrs /* 4750163953Srrs * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 4751163953Srrs * IP/SCTP/first chunk header... 4752163953Srrs */ 4753163953Srrs stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 4754163953Srrs sh, ch, &inp, &net); 4755163953Srrs /* inp's ref-count increased && stcb locked */ 4756163953Srrs if (inp == NULL) { 4757163953Srrs struct sctp_init_chunk *init_chk, chunk_buf; 4758163953Srrs 4759163953Srrs SCTP_STAT_INCR(sctps_noport); 4760163953Srrs#ifdef ICMP_BANDLIM 4761163953Srrs /* 4762163953Srrs * we use the bandwidth limiting to protect against sending 4763163953Srrs * too many ABORTS all at once. In this case these count the 4764163953Srrs * same as an ICMP message. 4765163953Srrs */ 4766163953Srrs if (badport_bandlim(0) < 0) 4767163953Srrs goto bad; 4768163953Srrs#endif /* ICMP_BANDLIM */ 4769163953Srrs#ifdef SCTP_DEBUG 4770163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4771163953Srrs printf("Sending a ABORT from packet entry!\n"); 4772163953Srrs } 4773163953Srrs#endif 4774163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 4775163953Srrs /* 4776163953Srrs * we do a trick here to get the INIT tag, dig in 4777163953Srrs * and get the tag from the INIT and put it in the 4778163953Srrs * common header. 4779163953Srrs */ 4780163953Srrs init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 4781163953Srrs iphlen + sizeof(*sh), sizeof(*init_chk), 4782163953Srrs (uint8_t *) & chunk_buf); 4783163953Srrs if (init_chk != NULL) 4784163953Srrs sh->v_tag = init_chk->init.initiate_tag; 4785163953Srrs } 4786165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 4787165220Srrs sctp_send_shutdown_complete2(m, iphlen, sh); 4788165220Srrs goto bad; 4789165220Srrs } 4790165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 4791165220Srrs goto bad; 4792165220Srrs } 4793165220Srrs if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 4794165220Srrs sctp_send_abort(m, iphlen, sh, 0, NULL); 4795163953Srrs goto bad; 4796163953Srrs } else if (stcb == NULL) { 4797163953Srrs refcount_up = 1; 4798163953Srrs } 4799163953Srrs#ifdef IPSEC 4800163953Srrs /* 4801163953Srrs * I very much doubt any of the IPSEC stuff will work but I have no 4802163953Srrs * idea, so I will leave it in place. 4803163953Srrs */ 4804163953Srrs 4805163996Srrs if (inp && ipsec4_in_reject(m, &inp->ip_inp.inp)) { 4806163953Srrs ipsecstat.in_polvio++; 4807163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4808163953Srrs goto bad; 4809163953Srrs } 4810163953Srrs#endif /* IPSEC */ 4811163953Srrs 4812163953Srrs 4813163953Srrs 4814163953Srrs /* 4815163953Srrs * common chunk processing 4816163953Srrs */ 4817163953Srrs length = ip->ip_len + iphlen; 4818163953Srrs offset -= sizeof(struct sctp_chunkhdr); 4819163953Srrs 4820163953Srrs ecn_bits = ip->ip_tos; 4821163953Srrs s = splnet(); 4822163953Srrs 4823163953Srrs sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 4824163953Srrs inp, stcb, net, ecn_bits); 4825163953Srrs /* inp's ref-count reduced && stcb unlocked */ 4826163953Srrs splx(s); 4827163953Srrs if (m) { 4828163953Srrs sctp_m_freem(m); 4829163953Srrs } 4830163953Srrs if ((inp) && (refcount_up)) { 4831163953Srrs /* reduce ref-count */ 4832163953Srrs SCTP_INP_WLOCK(inp); 4833163953Srrs SCTP_INP_DECR_REF(inp); 4834163953Srrs SCTP_INP_WUNLOCK(inp); 4835163953Srrs } 4836163953Srrs return; 4837163953Srrsbad: 4838163953Srrs if (stcb) 4839163953Srrs SCTP_TCB_UNLOCK(stcb); 4840163953Srrs 4841163953Srrs if ((inp) && (refcount_up)) { 4842163953Srrs /* reduce ref-count */ 4843163953Srrs SCTP_INP_WLOCK(inp); 4844163953Srrs SCTP_INP_DECR_REF(inp); 4845163953Srrs SCTP_INP_WUNLOCK(inp); 4846163953Srrs } 4847163953Srrs if (m) { 4848163953Srrs sctp_m_freem(m); 4849163953Srrs } 4850163953Srrs return; 4851163953Srrs} 4852