sctp_input.c revision 166675
1163953Srrs/*- 2166675Srrs * Copyright (c) 2001-2007, 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 166675 2007-02-12 23:24:31Z rrs $"); 35163953Srrs 36163953Srrs#include <netinet/sctp_os.h> 37163953Srrs#include <netinet/sctp_var.h> 38163953Srrs#include <netinet/sctp_pcb.h> 39163953Srrs#include <netinet/sctp_header.h> 40163953Srrs#include <netinet/sctputil.h> 41163953Srrs#include <netinet/sctp_output.h> 42163953Srrs#include <netinet/sctp_input.h> 43163953Srrs#include <netinet/sctp_auth.h> 44163953Srrs#include <netinet/sctp_indata.h> 45163953Srrs#include <netinet/sctp_asconf.h> 46163953Srrs 47163953Srrs 48163953Srrs#ifdef SCTP_DEBUG 49163953Srrsextern uint32_t sctp_debug_on; 50163953Srrs 51163953Srrs#endif 52163953Srrs 53163953Srrs 54165220Srrs 55165220Srrsstruct sctp_foo_stuff sctp_logoff[30000]; 56165220Srrsint sctp_logoff_stuff = 0; 57165220Srrs 58165220Srrs 59163953Srrsstatic void 60163953Srrssctp_stop_all_cookie_timers(struct sctp_tcb *stcb) 61163953Srrs{ 62163953Srrs struct sctp_nets *net; 63163953Srrs 64165220Srrs /* 65165220Srrs * This now not only stops all cookie timers it also stops any INIT 66165220Srrs * timers as well. This will make sure that the timers are stopped 67165220Srrs * in all collision cases. 68165220Srrs */ 69163953Srrs SCTP_TCB_LOCK_ASSERT(stcb); 70163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 71165220Srrs if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) { 72163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE, 73163953Srrs stcb->sctp_ep, 74163953Srrs stcb, 75165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1); 76165220Srrs } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) { 77165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, 78165220Srrs stcb->sctp_ep, 79165220Srrs stcb, 80165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2); 81163953Srrs } 82163953Srrs } 83163953Srrs} 84163953Srrs 85163953Srrs/* INIT handler */ 86163953Srrsstatic void 87163953Srrssctp_handle_init(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, 88163953Srrs struct sctp_init_chunk *cp, struct sctp_inpcb *inp, struct sctp_tcb *stcb, 89163953Srrs struct sctp_nets *net) 90163953Srrs{ 91163953Srrs struct sctp_init *init; 92163953Srrs struct mbuf *op_err; 93163953Srrs uint32_t init_limit; 94163953Srrs 95163953Srrs#ifdef SCTP_DEBUG 96163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 97163953Srrs printf("sctp_handle_init: handling INIT tcb:%p\n", stcb); 98163953Srrs } 99163953Srrs#endif 100163953Srrs op_err = NULL; 101163953Srrs init = &cp->init; 102163953Srrs /* First are we accepting? */ 103163953Srrs if ((inp->sctp_socket->so_qlimit == 0) && (stcb == NULL)) { 104163953Srrs#ifdef SCTP_DEBUG 105163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 106163953Srrs printf("sctp_handle_init: Abort, so_qlimit:%d\n", inp->sctp_socket->so_qlimit); 107163953Srrs } 108163953Srrs#endif 109163953Srrs /* 110163953Srrs * FIX ME ?? What about TCP model and we have a 111163953Srrs * match/restart case? 112163953Srrs */ 113163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 114163953Srrs return; 115163953Srrs } 116163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) { 117163953Srrs /* Invalid length */ 118163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 119163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 120163953Srrs return; 121163953Srrs } 122163953Srrs /* validate parameters */ 123163953Srrs if (init->initiate_tag == 0) { 124163953Srrs /* protocol error... send abort */ 125163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 126163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 127163953Srrs return; 128163953Srrs } 129163953Srrs if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) { 130163953Srrs /* invalid parameter... send abort */ 131163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 132163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 133163953Srrs return; 134163953Srrs } 135163953Srrs if (init->num_inbound_streams == 0) { 136163953Srrs /* protocol error... send abort */ 137163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 138163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 139163953Srrs return; 140163953Srrs } 141163953Srrs if (init->num_outbound_streams == 0) { 142163953Srrs /* protocol error... send abort */ 143163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 144163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 145163953Srrs return; 146163953Srrs } 147163953Srrs init_limit = offset + ntohs(cp->ch.chunk_length); 148163953Srrs if (sctp_validate_init_auth_params(m, offset + sizeof(*cp), 149163953Srrs init_limit)) { 150163953Srrs /* auth parameter(s) error... send abort */ 151163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, NULL); 152163953Srrs return; 153163953Srrs } 154163953Srrs /* send an INIT-ACK w/cookie */ 155163953Srrs#ifdef SCTP_DEBUG 156163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 157163953Srrs printf("sctp_handle_init: sending INIT-ACK\n"); 158163953Srrs } 159163953Srrs#endif 160163953Srrs sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, sh, cp); 161163953Srrs} 162163953Srrs 163163953Srrs/* 164163953Srrs * process peer "INIT/INIT-ACK" chunk returns value < 0 on error 165163953Srrs */ 166163953Srrsstatic int 167163953Srrssctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb, 168163953Srrs struct sctp_nets *net) 169163953Srrs{ 170163953Srrs struct sctp_init *init; 171163953Srrs struct sctp_association *asoc; 172163953Srrs struct sctp_nets *lnet; 173163953Srrs unsigned int i; 174163953Srrs 175163953Srrs init = &cp->init; 176163953Srrs asoc = &stcb->asoc; 177163953Srrs /* save off parameters */ 178163953Srrs asoc->peer_vtag = ntohl(init->initiate_tag); 179163953Srrs asoc->peers_rwnd = ntohl(init->a_rwnd); 180163953Srrs if (TAILQ_FIRST(&asoc->nets)) { 181163953Srrs /* update any ssthresh's that may have a default */ 182163953Srrs TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 183163953Srrs lnet->ssthresh = asoc->peers_rwnd; 184163953Srrs 185163953Srrs#if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING) 186163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION); 187163953Srrs#endif 188163953Srrs 189163953Srrs } 190163953Srrs } 191164181Srrs SCTP_TCB_SEND_LOCK(stcb); 192163953Srrs if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) { 193163953Srrs unsigned int newcnt; 194163953Srrs struct sctp_stream_out *outs; 195163953Srrs struct sctp_stream_queue_pending *sp; 196163953Srrs 197163953Srrs /* cut back on number of streams */ 198163953Srrs newcnt = ntohs(init->num_inbound_streams); 199163953Srrs /* This if is probably not needed but I am cautious */ 200163953Srrs if (asoc->strmout) { 201163953Srrs /* First make sure no data chunks are trapped */ 202163953Srrs for (i = newcnt; i < asoc->pre_open_streams; i++) { 203163953Srrs outs = &asoc->strmout[i]; 204163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 205163953Srrs while (sp) { 206163953Srrs TAILQ_REMOVE(&outs->outqueue, sp, 207163953Srrs next); 208163953Srrs asoc->stream_queue_cnt--; 209163953Srrs sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, 210163953Srrs stcb, SCTP_NOTIFY_DATAGRAM_UNSENT, 211163953Srrs sp); 212163953Srrs if (sp->data) { 213163953Srrs sctp_m_freem(sp->data); 214163953Srrs sp->data = NULL; 215163953Srrs } 216163953Srrs sctp_free_remote_addr(sp->net); 217163953Srrs sp->net = NULL; 218163953Srrs /* Free the chunk */ 219163964Srrs printf("sp:%p tcb:%p weird free case\n", 220163979Sru sp, stcb); 221163953Srrs 222163953Srrs sctp_free_a_strmoq(stcb, sp); 223163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 224163953Srrs } 225163953Srrs } 226163953Srrs } 227163953Srrs /* cut back the count and abandon the upper streams */ 228163953Srrs asoc->pre_open_streams = newcnt; 229163953Srrs } 230164181Srrs SCTP_TCB_SEND_UNLOCK(stcb); 231163953Srrs asoc->streamoutcnt = asoc->pre_open_streams; 232163953Srrs /* init tsn's */ 233163953Srrs asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1; 234163953Srrs#ifdef SCTP_MAP_LOGGING 235163953Srrs sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 236163953Srrs#endif 237163953Srrs /* This is the next one we expect */ 238163953Srrs asoc->str_reset_seq_in = asoc->asconf_seq_in + 1; 239163953Srrs 240163953Srrs asoc->mapping_array_base_tsn = ntohl(init->initial_tsn); 241163953Srrs asoc->cumulative_tsn = asoc->asconf_seq_in; 242163953Srrs asoc->last_echo_tsn = asoc->asconf_seq_in; 243163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 244163953Srrs /* open the requested streams */ 245163953Srrs if (asoc->strmin != NULL) { 246163953Srrs /* Free the old ones */ 247164181Srrs struct sctp_queued_to_read *ctl; 248164181Srrs 249164181Srrs for (i = 0; i < asoc->streamincnt; i++) { 250164181Srrs ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 251164181Srrs while (ctl) { 252164181Srrs TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 253164181Srrs sctp_free_remote_addr(ctl->whoFrom); 254164181Srrs sctp_m_freem(ctl->data); 255164181Srrs ctl->data = NULL; 256164181Srrs sctp_free_a_readq(stcb, ctl); 257164181Srrs ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 258164181Srrs } 259164181Srrs } 260163953Srrs SCTP_FREE(asoc->strmin); 261163953Srrs } 262164181Srrs asoc->streamincnt = ntohs(init->num_outbound_streams); 263164181Srrs if (asoc->streamincnt > MAX_SCTP_STREAMS) { 264164181Srrs asoc->streamincnt = MAX_SCTP_STREAMS; 265164181Srrs } 266163953Srrs SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt * 267163953Srrs sizeof(struct sctp_stream_in), "StreamsIn"); 268163953Srrs if (asoc->strmin == NULL) { 269163953Srrs /* we didn't get memory for the streams! */ 270163953Srrs#ifdef SCTP_DEBUG 271163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 272163953Srrs printf("process_init: couldn't get memory for the streams!\n"); 273163953Srrs } 274163953Srrs#endif 275163953Srrs return (-1); 276163953Srrs } 277163953Srrs for (i = 0; i < asoc->streamincnt; i++) { 278163953Srrs asoc->strmin[i].stream_no = i; 279163953Srrs asoc->strmin[i].last_sequence_delivered = 0xffff; 280163953Srrs /* 281163953Srrs * U-stream ranges will be set when the cookie is unpacked. 282163953Srrs * Or for the INIT sender they are un set (if pr-sctp not 283163953Srrs * supported) when the INIT-ACK arrives. 284163953Srrs */ 285163953Srrs TAILQ_INIT(&asoc->strmin[i].inqueue); 286163953Srrs /* 287163953Srrs * we are not on any wheel, pr-sctp streams will go on the 288163953Srrs * wheel when they have data waiting for reorder. 289163953Srrs */ 290163953Srrs asoc->strmin[i].next_spoke.tqe_next = 0; 291163953Srrs asoc->strmin[i].next_spoke.tqe_prev = 0; 292163953Srrs } 293163953Srrs 294163953Srrs /* 295163953Srrs * load_address_from_init will put the addresses into the 296163953Srrs * association when the COOKIE is processed or the INIT-ACK is 297163953Srrs * processed. Both types of COOKIE's existing and new call this 298163953Srrs * routine. It will remove addresses that are no longer in the 299163953Srrs * association (for the restarting case where addresses are 300163953Srrs * removed). Up front when the INIT arrives we will discard it if it 301163953Srrs * is a restart and new addresses have been added. 302163953Srrs */ 303163953Srrs return (0); 304163953Srrs} 305163953Srrs 306163953Srrs/* 307163953Srrs * INIT-ACK message processing/consumption returns value < 0 on error 308163953Srrs */ 309163953Srrsstatic int 310163953Srrssctp_process_init_ack(struct mbuf *m, int iphlen, int offset, 311163953Srrs struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 312163953Srrs struct sctp_nets *net) 313163953Srrs{ 314163953Srrs struct sctp_association *asoc; 315163953Srrs struct mbuf *op_err; 316163953Srrs int retval, abort_flag; 317163953Srrs uint32_t initack_limit; 318163953Srrs 319163953Srrs /* First verify that we have no illegal param's */ 320163953Srrs abort_flag = 0; 321163953Srrs op_err = NULL; 322163953Srrs 323163953Srrs op_err = sctp_arethere_unrecognized_parameters(m, 324163953Srrs (offset + sizeof(struct sctp_init_chunk)), 325163953Srrs &abort_flag, (struct sctp_chunkhdr *)cp); 326163953Srrs if (abort_flag) { 327163953Srrs /* Send an abort and notify peer */ 328163953Srrs if (op_err != NULL) { 329163953Srrs sctp_send_operr_to(m, iphlen, op_err, cp->init.initiate_tag); 330163953Srrs } else { 331163953Srrs /* 332163953Srrs * Just notify (abort_assoc does this if we send an 333163953Srrs * abort). 334163953Srrs */ 335163953Srrs sctp_abort_notification(stcb, 0); 336163953Srrs /* 337163953Srrs * No sense in further INIT's since we will get the 338163953Srrs * same param back 339163953Srrs */ 340165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3); 341163953Srrs } 342163953Srrs return (-1); 343163953Srrs } 344163953Srrs asoc = &stcb->asoc; 345163953Srrs /* process the peer's parameters in the INIT-ACK */ 346163953Srrs retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb, net); 347163953Srrs if (retval < 0) { 348163953Srrs return (retval); 349163953Srrs } 350163953Srrs initack_limit = offset + ntohs(cp->ch.chunk_length); 351163953Srrs /* load all addresses */ 352163953Srrs if ((retval = sctp_load_addresses_from_init(stcb, m, iphlen, 353163953Srrs (offset + sizeof(struct sctp_init_chunk)), initack_limit, sh, 354163953Srrs NULL))) { 355163953Srrs /* Huh, we should abort */ 356163953Srrs#ifdef SCTP_DEBUG 357163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 358163953Srrs printf("Load addresses from INIT causes an abort %d\n", retval); 359163953Srrs } 360163953Srrs#endif 361163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 362163953Srrs NULL); 363163953Srrs return (-1); 364163953Srrs } 365163953Srrs stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs, 366163953Srrs stcb->asoc.local_hmacs); 367163953Srrs if (op_err) { 368163953Srrs sctp_queue_op_err(stcb, op_err); 369163953Srrs /* queuing will steal away the mbuf chain to the out queue */ 370163953Srrs op_err = NULL; 371163953Srrs } 372163953Srrs /* extract the cookie and queue it to "echo" it back... */ 373163953Srrs stcb->asoc.overall_error_count = 0; 374163953Srrs net->error_count = 0; 375163953Srrs 376163953Srrs /* 377163953Srrs * Cancel the INIT timer, We do this first before queueing the 378163953Srrs * cookie. We always cancel at the primary to assue that we are 379163953Srrs * canceling the timer started by the INIT which always goes to the 380163953Srrs * primary. 381163953Srrs */ 382163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb, 383165220Srrs asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4); 384163953Srrs 385165220Srrs /* calculate the RTO */ 386165220Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered); 387165220Srrs 388163953Srrs retval = sctp_send_cookie_echo(m, offset, stcb, net); 389163953Srrs if (retval < 0) { 390163953Srrs /* 391163953Srrs * No cookie, we probably should send a op error. But in any 392163953Srrs * case if there is no cookie in the INIT-ACK, we can 393163953Srrs * abandon the peer, its broke. 394163953Srrs */ 395163953Srrs if (retval == -3) { 396163953Srrs /* We abort with an error of missing mandatory param */ 397163953Srrs struct mbuf *op_err; 398163953Srrs 399163953Srrs op_err = 400163953Srrs sctp_generate_invmanparam(SCTP_CAUSE_MISSING_PARAM); 401163953Srrs if (op_err) { 402163953Srrs /* 403163953Srrs * Expand beyond to include the mandatory 404163953Srrs * param cookie 405163953Srrs */ 406163953Srrs struct sctp_inv_mandatory_param *mp; 407163953Srrs 408165647Srrs SCTP_BUF_LEN(op_err) = 409163953Srrs sizeof(struct sctp_inv_mandatory_param); 410163953Srrs mp = mtod(op_err, 411163953Srrs struct sctp_inv_mandatory_param *); 412163953Srrs /* Subtract the reserved param */ 413163953Srrs mp->length = 414163953Srrs htons(sizeof(struct sctp_inv_mandatory_param) - 2); 415163953Srrs mp->num_param = htonl(1); 416163953Srrs mp->param = htons(SCTP_STATE_COOKIE); 417163953Srrs mp->resv = 0; 418163953Srrs } 419163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, 420163953Srrs sh, op_err); 421163953Srrs } 422163953Srrs return (retval); 423163953Srrs } 424163953Srrs return (0); 425163953Srrs} 426163953Srrs 427163953Srrsstatic void 428163953Srrssctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp, 429163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 430163953Srrs{ 431163953Srrs struct sockaddr_storage store; 432163953Srrs struct sockaddr_in *sin; 433163953Srrs struct sockaddr_in6 *sin6; 434163953Srrs struct sctp_nets *r_net; 435163953Srrs struct timeval tv; 436163953Srrs 437163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) { 438163953Srrs /* Invalid length */ 439163953Srrs return; 440163953Srrs } 441163953Srrs sin = (struct sockaddr_in *)&store; 442163953Srrs sin6 = (struct sockaddr_in6 *)&store; 443163953Srrs 444163953Srrs memset(&store, 0, sizeof(store)); 445163953Srrs if (cp->heartbeat.hb_info.addr_family == AF_INET && 446163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) { 447163953Srrs sin->sin_family = cp->heartbeat.hb_info.addr_family; 448163953Srrs sin->sin_len = cp->heartbeat.hb_info.addr_len; 449163953Srrs sin->sin_port = stcb->rport; 450163953Srrs memcpy(&sin->sin_addr, cp->heartbeat.hb_info.address, 451163953Srrs sizeof(sin->sin_addr)); 452163953Srrs } else if (cp->heartbeat.hb_info.addr_family == AF_INET6 && 453163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) { 454163953Srrs sin6->sin6_family = cp->heartbeat.hb_info.addr_family; 455163953Srrs sin6->sin6_len = cp->heartbeat.hb_info.addr_len; 456163953Srrs sin6->sin6_port = stcb->rport; 457163953Srrs memcpy(&sin6->sin6_addr, cp->heartbeat.hb_info.address, 458163953Srrs sizeof(sin6->sin6_addr)); 459163953Srrs } else { 460163953Srrs return; 461163953Srrs } 462163953Srrs r_net = sctp_findnet(stcb, (struct sockaddr *)sin); 463163953Srrs if (r_net == NULL) { 464163953Srrs#ifdef SCTP_DEBUG 465163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 466163953Srrs printf("Huh? I can't find the address I sent it to, discard\n"); 467163953Srrs } 468163953Srrs#endif 469163953Srrs return; 470163953Srrs } 471163953Srrs if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) && 472163953Srrs (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) && 473163953Srrs (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) { 474163953Srrs /* 475163953Srrs * If the its a HB and it's random value is correct when can 476163953Srrs * confirm the destination. 477163953Srrs */ 478163953Srrs r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 479163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 480163953Srrs stcb, 0, (void *)r_net); 481163953Srrs } 482163953Srrs r_net->error_count = 0; 483163953Srrs r_net->hb_responded = 1; 484163953Srrs tv.tv_sec = cp->heartbeat.hb_info.time_value_1; 485163953Srrs tv.tv_usec = cp->heartbeat.hb_info.time_value_2; 486163953Srrs if (r_net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 487163953Srrs r_net->dest_state &= ~SCTP_ADDR_NOT_REACHABLE; 488163953Srrs r_net->dest_state |= SCTP_ADDR_REACHABLE; 489163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 490163953Srrs SCTP_HEARTBEAT_SUCCESS, (void *)r_net); 491163953Srrs /* now was it the primary? if so restore */ 492163953Srrs if (r_net->dest_state & SCTP_ADDR_WAS_PRIMARY) { 493163953Srrs sctp_set_primary_addr(stcb, (struct sockaddr *)NULL, r_net); 494163953Srrs } 495163953Srrs } 496163953Srrs /* Now lets do a RTO with this */ 497163953Srrs r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv); 498163953Srrs} 499163953Srrs 500163953Srrsstatic void 501163953Srrssctp_handle_abort(struct sctp_abort_chunk *cp, 502163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 503163953Srrs{ 504163953Srrs 505163953Srrs#ifdef SCTP_DEBUG 506163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 507163953Srrs printf("sctp_handle_abort: handling ABORT\n"); 508163953Srrs } 509163953Srrs#endif 510163953Srrs if (stcb == NULL) 511163953Srrs return; 512163953Srrs /* verify that the destination addr is in the association */ 513163953Srrs /* ignore abort for addresses being deleted */ 514163953Srrs 515163953Srrs /* stop any receive timers */ 516165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5); 517163953Srrs /* notify user of the abort and clean up... */ 518163953Srrs sctp_abort_notification(stcb, 0); 519163953Srrs /* free the tcb */ 520163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_aborted); 521163953Srrs if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 522163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 523163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 524163953Srrs } 525165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_6); 526163953Srrs#ifdef SCTP_DEBUG 527163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 528163953Srrs printf("sctp_handle_abort: finished\n"); 529163953Srrs } 530163953Srrs#endif 531163953Srrs} 532163953Srrs 533163953Srrsstatic void 534163953Srrssctp_handle_shutdown(struct sctp_shutdown_chunk *cp, 535163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag) 536163953Srrs{ 537163953Srrs struct sctp_association *asoc; 538163953Srrs int some_on_streamwheel; 539163953Srrs 540163953Srrs#ifdef SCTP_DEBUG 541163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 542163953Srrs printf("sctp_handle_shutdown: handling SHUTDOWN\n"); 543163953Srrs } 544163953Srrs#endif 545163953Srrs if (stcb == NULL) 546163953Srrs return; 547165220Srrs asoc = &stcb->asoc; 548165220Srrs if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 549165220Srrs (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 550163953Srrs return; 551163953Srrs } 552163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) { 553163953Srrs /* Shutdown NOT the expected size */ 554163953Srrs return; 555163953Srrs } else { 556163953Srrs sctp_update_acked(stcb, cp, net, abort_flag); 557163953Srrs } 558165220Srrs if (asoc->control_pdapi) { 559163953Srrs /* 560163953Srrs * With a normal shutdown we assume the end of last record. 561163953Srrs */ 562163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 563165220Srrs asoc->control_pdapi->end_added = 1; 564165220Srrs asoc->control_pdapi->pdapi_aborted = 1; 565165220Srrs asoc->control_pdapi = NULL; 566163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 567163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 568163953Srrs } 569163953Srrs /* goto SHUTDOWN_RECEIVED state to block new requests */ 570163953Srrs if (stcb->sctp_socket) { 571163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 572163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) { 573163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_RECEIVED; 574163953Srrs /* 575163953Srrs * notify upper layer that peer has initiated a 576163953Srrs * shutdown 577163953Srrs */ 578163953Srrs sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL); 579163953Srrs 580163953Srrs /* reset time */ 581163953Srrs SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 582163953Srrs } 583163953Srrs } 584163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) { 585163953Srrs /* 586163953Srrs * stop the shutdown timer, since we WILL move to 587163953Srrs * SHUTDOWN-ACK-SENT. 588163953Srrs */ 589165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_7); 590163953Srrs } 591163953Srrs /* Now are we there yet? */ 592163953Srrs some_on_streamwheel = 0; 593163953Srrs if (!TAILQ_EMPTY(&asoc->out_wheel)) { 594163953Srrs /* Check to see if some data queued */ 595163953Srrs struct sctp_stream_out *outs; 596163953Srrs 597163953Srrs TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) { 598163953Srrs if (!TAILQ_EMPTY(&outs->outqueue)) { 599163953Srrs some_on_streamwheel = 1; 600163953Srrs break; 601163953Srrs } 602163953Srrs } 603163953Srrs } 604163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 605163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 606163953Srrs some_on_streamwheel) { 607163953Srrs /* By returning we will push more data out */ 608163953Srrs return; 609163953Srrs } else { 610163953Srrs /* no outstanding data to send, so move on... */ 611163953Srrs /* send SHUTDOWN-ACK */ 612163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 613163953Srrs /* move to SHUTDOWN-ACK-SENT state */ 614166675Srrs if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 615166675Srrs (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 616163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 617163953Srrs } 618163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_ACK_SENT; 619163953Srrs 620163953Srrs /* start SHUTDOWN timer */ 621163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, 622163953Srrs stcb, net); 623163953Srrs } 624163953Srrs} 625163953Srrs 626163953Srrsstatic void 627163953Srrssctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp, 628163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 629163953Srrs{ 630163953Srrs struct sctp_association *asoc; 631163953Srrs 632163953Srrs#ifdef SCTP_DEBUG 633163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 634163953Srrs printf("sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n"); 635163953Srrs } 636163953Srrs#endif 637163953Srrs if (stcb == NULL) 638163953Srrs return; 639163953Srrs 640163953Srrs asoc = &stcb->asoc; 641163953Srrs /* process according to association state */ 642163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 643163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 644163953Srrs /* unexpected SHUTDOWN-ACK... so ignore... */ 645163953Srrs SCTP_TCB_UNLOCK(stcb); 646163953Srrs return; 647163953Srrs } 648165220Srrs if (asoc->control_pdapi) { 649163953Srrs /* 650163953Srrs * With a normal shutdown we assume the end of last record. 651163953Srrs */ 652163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 653165220Srrs asoc->control_pdapi->end_added = 1; 654165220Srrs asoc->control_pdapi->pdapi_aborted = 1; 655165220Srrs asoc->control_pdapi = NULL; 656163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 657163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 658163953Srrs } 659163953Srrs /* are the queues empty? */ 660163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 661163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 662163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 663164205Srrs sctp_report_all_outbound(stcb, 0); 664163953Srrs } 665163953Srrs /* stop the timer */ 666165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_8); 667163953Srrs /* send SHUTDOWN-COMPLETE */ 668163953Srrs sctp_send_shutdown_complete(stcb, net); 669163953Srrs /* notify upper layer protocol */ 670163953Srrs if (stcb->sctp_socket) { 671163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 672163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 673163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 674163953Srrs /* Set the connected flag to disconnected */ 675163953Srrs stcb->sctp_ep->sctp_socket->so_snd.sb_cc = 0; 676163953Srrs } 677163953Srrs } 678163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 679163953Srrs /* free the TCB but first save off the ep */ 680165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, 681165220Srrs SCTP_FROM_SCTP_INPUT + SCTP_LOC_9); 682163953Srrs} 683163953Srrs 684163953Srrs/* 685163953Srrs * Skip past the param header and then we will find the chunk that caused the 686163953Srrs * problem. There are two possiblities ASCONF or FWD-TSN other than that and 687163953Srrs * our peer must be broken. 688163953Srrs */ 689163953Srrsstatic void 690163953Srrssctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr, 691163953Srrs struct sctp_nets *net) 692163953Srrs{ 693163953Srrs struct sctp_chunkhdr *chk; 694163953Srrs 695163953Srrs chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr)); 696163953Srrs switch (chk->chunk_type) { 697163953Srrs case SCTP_ASCONF_ACK: 698163953Srrs case SCTP_ASCONF: 699163953Srrs sctp_asconf_cleanup(stcb, net); 700163953Srrs break; 701163953Srrs case SCTP_FORWARD_CUM_TSN: 702163953Srrs stcb->asoc.peer_supports_prsctp = 0; 703163953Srrs break; 704163953Srrs default: 705163953Srrs#ifdef SCTP_DEBUG 706163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 707163953Srrs printf("Peer does not support chunk type %d(%x)??\n", 708163953Srrs chk->chunk_type, (uint32_t) chk->chunk_type); 709163953Srrs } 710163953Srrs#endif 711163953Srrs break; 712163953Srrs } 713163953Srrs} 714163953Srrs 715163953Srrs/* 716163953Srrs * Skip past the param header and then we will find the param that caused the 717163953Srrs * problem. There are a number of param's in a ASCONF OR the prsctp param 718163953Srrs * these will turn of specific features. 719163953Srrs */ 720163953Srrsstatic void 721163953Srrssctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr) 722163953Srrs{ 723163953Srrs struct sctp_paramhdr *pbad; 724163953Srrs 725163953Srrs pbad = phdr + 1; 726163953Srrs switch (ntohs(pbad->param_type)) { 727163953Srrs /* pr-sctp draft */ 728163953Srrs case SCTP_PRSCTP_SUPPORTED: 729163953Srrs stcb->asoc.peer_supports_prsctp = 0; 730163953Srrs break; 731163953Srrs case SCTP_SUPPORTED_CHUNK_EXT: 732163953Srrs break; 733163953Srrs /* draft-ietf-tsvwg-addip-sctp */ 734163953Srrs case SCTP_ECN_NONCE_SUPPORTED: 735163953Srrs stcb->asoc.peer_supports_ecn_nonce = 0; 736163953Srrs stcb->asoc.ecn_nonce_allowed = 0; 737163953Srrs stcb->asoc.ecn_allowed = 0; 738163953Srrs break; 739163953Srrs case SCTP_ADD_IP_ADDRESS: 740163953Srrs case SCTP_DEL_IP_ADDRESS: 741163953Srrs case SCTP_SET_PRIM_ADDR: 742163953Srrs stcb->asoc.peer_supports_asconf = 0; 743163953Srrs break; 744163953Srrs case SCTP_SUCCESS_REPORT: 745163953Srrs case SCTP_ERROR_CAUSE_IND: 746163953Srrs#ifdef SCTP_DEBUG 747163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 748163953Srrs printf("Huh, the peer does not support success? or error cause?\n"); 749163953Srrs printf("Turning off ASCONF to this strange peer\n"); 750163953Srrs } 751163953Srrs#endif 752163953Srrs stcb->asoc.peer_supports_asconf = 0; 753163953Srrs break; 754163953Srrs default: 755163953Srrs#ifdef SCTP_DEBUG 756163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 757163953Srrs printf("Peer does not support param type %d(%x)??\n", 758163953Srrs pbad->param_type, (uint32_t) pbad->param_type); 759163953Srrs } 760163953Srrs#endif 761163953Srrs break; 762163953Srrs } 763163953Srrs} 764163953Srrs 765163953Srrsstatic int 766163953Srrssctp_handle_error(struct sctp_chunkhdr *ch, 767163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 768163953Srrs{ 769163953Srrs int chklen; 770163953Srrs struct sctp_paramhdr *phdr; 771163953Srrs uint16_t error_type; 772163953Srrs uint16_t error_len; 773163953Srrs struct sctp_association *asoc; 774163953Srrs 775163953Srrs int adjust; 776163953Srrs 777163953Srrs /* parse through all of the errors and process */ 778163953Srrs asoc = &stcb->asoc; 779163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)ch + 780163953Srrs sizeof(struct sctp_chunkhdr)); 781163953Srrs chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr); 782163953Srrs while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) { 783163953Srrs /* Process an Error Cause */ 784163953Srrs error_type = ntohs(phdr->param_type); 785163953Srrs error_len = ntohs(phdr->param_length); 786163953Srrs if ((error_len > chklen) || (error_len == 0)) { 787163953Srrs /* invalid param length for this param */ 788163953Srrs#ifdef SCTP_DEBUG 789163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 790163953Srrs printf("Bogus length in error param- chunk left:%d errorlen:%d\n", 791163953Srrs chklen, error_len); 792163953Srrs } 793163953Srrs#endif /* SCTP_DEBUG */ 794163953Srrs return (0); 795163953Srrs } 796163953Srrs switch (error_type) { 797163953Srrs case SCTP_CAUSE_INVALID_STREAM: 798163953Srrs case SCTP_CAUSE_MISSING_PARAM: 799163953Srrs case SCTP_CAUSE_INVALID_PARAM: 800163953Srrs case SCTP_CAUSE_NO_USER_DATA: 801163953Srrs#ifdef SCTP_DEBUG 802163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 803163953Srrs printf("Software error we got a %d back? We have a bug :/ (or do they?)\n", 804163953Srrs error_type); 805163953Srrs } 806163953Srrs#endif 807163953Srrs break; 808163953Srrs case SCTP_CAUSE_STALE_COOKIE: 809163953Srrs /* 810163953Srrs * We only act if we have echoed a cookie and are 811163953Srrs * waiting. 812163953Srrs */ 813163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 814163953Srrs int *p; 815163953Srrs 816163953Srrs p = (int *)((caddr_t)phdr + sizeof(*phdr)); 817163953Srrs /* Save the time doubled */ 818163953Srrs asoc->cookie_preserve_req = ntohl(*p) << 1; 819163953Srrs asoc->stale_cookie_count++; 820163953Srrs if (asoc->stale_cookie_count > 821163953Srrs asoc->max_init_times) { 822163953Srrs sctp_abort_notification(stcb, 0); 823163953Srrs /* now free the asoc */ 824165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_10); 825163953Srrs return (-1); 826163953Srrs } 827163953Srrs /* blast back to INIT state */ 828163953Srrs asoc->state &= ~SCTP_STATE_COOKIE_ECHOED; 829163953Srrs asoc->state |= SCTP_STATE_COOKIE_WAIT; 830163953Srrs 831163953Srrs sctp_stop_all_cookie_timers(stcb); 832163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 833163953Srrs } 834163953Srrs break; 835163953Srrs case SCTP_CAUSE_UNRESOLVABLE_ADDR: 836163953Srrs /* 837163953Srrs * Nothing we can do here, we don't do hostname 838163953Srrs * addresses so if the peer does not like my IPv6 839163953Srrs * (or IPv4 for that matter) it does not matter. If 840163953Srrs * they don't support that type of address, they can 841163953Srrs * NOT possibly get that packet type... i.e. with no 842163953Srrs * IPv6 you can't recieve a IPv6 packet. so we can 843163953Srrs * safely ignore this one. If we ever added support 844163953Srrs * for HOSTNAME Addresses, then we would need to do 845163953Srrs * something here. 846163953Srrs */ 847163953Srrs break; 848163953Srrs case SCTP_CAUSE_UNRECOG_CHUNK: 849163953Srrs sctp_process_unrecog_chunk(stcb, phdr, net); 850163953Srrs break; 851163953Srrs case SCTP_CAUSE_UNRECOG_PARAM: 852163953Srrs sctp_process_unrecog_param(stcb, phdr); 853163953Srrs break; 854163953Srrs case SCTP_CAUSE_COOKIE_IN_SHUTDOWN: 855163953Srrs /* 856163953Srrs * We ignore this since the timer will drive out a 857163953Srrs * new cookie anyway and there timer will drive us 858163953Srrs * to send a SHUTDOWN_COMPLETE. We can't send one 859163953Srrs * here since we don't have their tag. 860163953Srrs */ 861163953Srrs break; 862163953Srrs case SCTP_CAUSE_DELETING_LAST_ADDR: 863163953Srrs case SCTP_CAUSE_RESOURCE_SHORTAGE: 864163953Srrs case SCTP_CAUSE_DELETING_SRC_ADDR: 865163953Srrs /* 866163953Srrs * We should NOT get these here, but in a 867166086Srrs * ASCONF-ACK. 868163953Srrs */ 869163953Srrs#ifdef SCTP_DEBUG 870163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 871163953Srrs printf("Peer sends ASCONF errors in a Operational Error?<%d>?\n", 872163953Srrs error_type); 873163953Srrs } 874163953Srrs#endif 875163953Srrs break; 876163953Srrs case SCTP_CAUSE_OUT_OF_RESC: 877163953Srrs /* 878163953Srrs * And what, pray tell do we do with the fact that 879163953Srrs * the peer is out of resources? Not really sure we 880166086Srrs * could do anything but abort. I suspect this 881163953Srrs * should have came WITH an abort instead of in a 882163953Srrs * OP-ERROR. 883163953Srrs */ 884163953Srrs break; 885163953Srrs default: 886163953Srrs#ifdef SCTP_DEBUG 887163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 888163953Srrs /* don't know what this error cause is... */ 889163953Srrs printf("sctp_handle_error: unknown error type = 0x%xh\n", 890163953Srrs error_type); 891163953Srrs } 892163953Srrs#endif /* SCTP_DEBUG */ 893163953Srrs break; 894163953Srrs } 895163953Srrs adjust = SCTP_SIZE32(error_len); 896163953Srrs chklen -= adjust; 897163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust); 898163953Srrs } 899163953Srrs return (0); 900163953Srrs} 901163953Srrs 902163953Srrsstatic int 903163953Srrssctp_handle_init_ack(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, 904163953Srrs struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 905163953Srrs struct sctp_nets *net) 906163953Srrs{ 907163953Srrs struct sctp_init_ack *init_ack; 908163953Srrs int *state; 909163953Srrs struct mbuf *op_err; 910163953Srrs 911163953Srrs#ifdef SCTP_DEBUG 912163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 913163953Srrs printf("sctp_handle_init_ack: handling INIT-ACK\n"); 914163953Srrs } 915163953Srrs#endif 916163953Srrs if (stcb == NULL) { 917163953Srrs#ifdef SCTP_DEBUG 918163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 919163953Srrs printf("sctp_handle_init_ack: TCB is null\n"); 920163953Srrs } 921163953Srrs#endif 922163953Srrs return (-1); 923163953Srrs } 924163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) { 925163953Srrs /* Invalid length */ 926163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 927163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 928163953Srrs op_err); 929163953Srrs return (-1); 930163953Srrs } 931163953Srrs init_ack = &cp->init; 932163953Srrs /* validate parameters */ 933163953Srrs if (init_ack->initiate_tag == 0) { 934163953Srrs /* protocol error... send an abort */ 935163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 936163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 937163953Srrs op_err); 938163953Srrs return (-1); 939163953Srrs } 940163953Srrs if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) { 941163953Srrs /* protocol error... send an abort */ 942163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 943163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 944163953Srrs op_err); 945163953Srrs return (-1); 946163953Srrs } 947163953Srrs if (init_ack->num_inbound_streams == 0) { 948163953Srrs /* protocol error... send an abort */ 949163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 950163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 951163953Srrs op_err); 952163953Srrs return (-1); 953163953Srrs } 954163953Srrs if (init_ack->num_outbound_streams == 0) { 955163953Srrs /* protocol error... send an abort */ 956163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 957163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 958163953Srrs op_err); 959163953Srrs return (-1); 960163953Srrs } 961163953Srrs /* process according to association state... */ 962163953Srrs state = &stcb->asoc.state; 963163953Srrs switch (*state & SCTP_STATE_MASK) { 964163953Srrs case SCTP_STATE_COOKIE_WAIT: 965163953Srrs /* this is the expected state for this chunk */ 966163953Srrs /* process the INIT-ACK parameters */ 967163953Srrs if (stcb->asoc.primary_destination->dest_state & 968163953Srrs SCTP_ADDR_UNCONFIRMED) { 969163953Srrs /* 970163953Srrs * The primary is where we sent the INIT, we can 971163953Srrs * always consider it confirmed when the INIT-ACK is 972163953Srrs * returned. Do this before we load addresses 973163953Srrs * though. 974163953Srrs */ 975163953Srrs stcb->asoc.primary_destination->dest_state &= 976163953Srrs ~SCTP_ADDR_UNCONFIRMED; 977163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 978163953Srrs stcb, 0, (void *)stcb->asoc.primary_destination); 979163953Srrs } 980163953Srrs if (sctp_process_init_ack(m, iphlen, offset, sh, cp, stcb, net 981163953Srrs ) < 0) { 982163953Srrs /* error in parsing parameters */ 983163953Srrs return (-1); 984163953Srrs } 985163953Srrs /* update our state */ 986163953Srrs#ifdef SCTP_DEBUG 987163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 988163953Srrs printf("moving to COOKIE-ECHOED state\n"); 989163953Srrs } 990163953Srrs#endif 991163953Srrs if (*state & SCTP_STATE_SHUTDOWN_PENDING) { 992163953Srrs *state = SCTP_STATE_COOKIE_ECHOED | 993163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 994163953Srrs } else { 995163953Srrs *state = SCTP_STATE_COOKIE_ECHOED; 996163953Srrs } 997163953Srrs 998163953Srrs /* reset the RTO calc */ 999163953Srrs stcb->asoc.overall_error_count = 0; 1000163953Srrs SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1001163953Srrs /* 1002163953Srrs * collapse the init timer back in case of a exponential 1003165220Srrs * backoff 1004163953Srrs */ 1005163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep, 1006163953Srrs stcb, net); 1007163953Srrs /* 1008163953Srrs * the send at the end of the inbound data processing will 1009163953Srrs * cause the cookie to be sent 1010163953Srrs */ 1011163953Srrs break; 1012163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 1013163953Srrs /* incorrect state... discard */ 1014163953Srrs break; 1015163953Srrs case SCTP_STATE_COOKIE_ECHOED: 1016163953Srrs /* incorrect state... discard */ 1017163953Srrs break; 1018163953Srrs case SCTP_STATE_OPEN: 1019163953Srrs /* incorrect state... discard */ 1020163953Srrs break; 1021163953Srrs case SCTP_STATE_EMPTY: 1022163953Srrs case SCTP_STATE_INUSE: 1023163953Srrs default: 1024163953Srrs /* incorrect state... discard */ 1025163953Srrs return (-1); 1026163953Srrs break; 1027163953Srrs } /* end switch asoc state */ 1028163953Srrs#ifdef SCTP_DEBUG 1029163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1030163953Srrs printf("Leaving handle-init-ack end\n"); 1031163953Srrs } 1032163953Srrs#endif 1033163953Srrs return (0); 1034163953Srrs} 1035163953Srrs 1036163953Srrs 1037163953Srrs/* 1038163953Srrs * handle a state cookie for an existing association m: input packet mbuf 1039163953Srrs * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a 1040163953Srrs * "split" mbuf and the cookie signature does not exist offset: offset into 1041163953Srrs * mbuf to the cookie-echo chunk 1042163953Srrs */ 1043163953Srrsstatic struct sctp_tcb * 1044163953Srrssctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset, 1045163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1046163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 1047163953Srrs struct sockaddr *init_src, int *notification, sctp_assoc_t * sac_assoc_id) 1048163953Srrs{ 1049163953Srrs struct sctp_association *asoc; 1050163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1051163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1052163953Srrs int chk_length; 1053165220Srrs int init_offset, initack_offset, i; 1054163953Srrs int retval; 1055164205Srrs int spec_flag = 0; 1056166023Srrs int how_indx; 1057163953Srrs 1058163953Srrs /* I know that the TCB is non-NULL from the caller */ 1059163953Srrs asoc = &stcb->asoc; 1060166675Srrs for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) { 1061166023Srrs if (asoc->cookie_how[how_indx] == 0) 1062166023Srrs break; 1063166023Srrs } 1064166023Srrs if (how_indx < sizeof(asoc->cookie_how)) { 1065166023Srrs asoc->cookie_how[how_indx] = 1; 1066166023Srrs } 1067163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) { 1068163953Srrs /* SHUTDOWN came in after sending INIT-ACK */ 1069163953Srrs struct mbuf *op_err; 1070163953Srrs struct sctp_paramhdr *ph; 1071163953Srrs 1072163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 1073163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 1074165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 1075163953Srrs if (op_err == NULL) { 1076163953Srrs /* FOOBAR */ 1077163953Srrs return (NULL); 1078163953Srrs } 1079163953Srrs /* pre-reserve some space */ 1080165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 1081165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 1082165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 1083163953Srrs /* Set the len */ 1084165647Srrs SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 1085163953Srrs ph = mtod(op_err, struct sctp_paramhdr *); 1086163953Srrs ph->param_type = htons(SCTP_CAUSE_COOKIE_IN_SHUTDOWN); 1087163953Srrs ph->param_length = htons(sizeof(struct sctp_paramhdr)); 1088163953Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag); 1089166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1090166023Srrs asoc->cookie_how[how_indx] = 2; 1091163953Srrs return (NULL); 1092163953Srrs } 1093163953Srrs /* 1094163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1095163953Srrs * INIT should start after the cookie-echo header struct (chunk 1096163953Srrs * header, state cookie header struct) 1097163953Srrs */ 1098163953Srrs init_offset = offset += sizeof(struct sctp_cookie_echo_chunk); 1099163953Srrs 1100163953Srrs init_cp = (struct sctp_init_chunk *) 1101163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1102163953Srrs (uint8_t *) & init_buf); 1103163953Srrs if (init_cp == NULL) { 1104163953Srrs /* could not pull a INIT chunk in cookie */ 1105163953Srrs return (NULL); 1106163953Srrs } 1107163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1108163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1109163953Srrs return (NULL); 1110163953Srrs } 1111163953Srrs /* 1112163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1113163953Srrs * INIT-ACK follows the INIT chunk 1114163953Srrs */ 1115163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1116163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1117163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1118163953Srrs (uint8_t *) & initack_buf); 1119163953Srrs if (initack_cp == NULL) { 1120163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1121163953Srrs return (NULL); 1122163953Srrs } 1123163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1124163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1125163953Srrs return (NULL); 1126163953Srrs } 1127163953Srrs if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) && 1128163953Srrs (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) { 1129163953Srrs /* 1130163953Srrs * case D in Section 5.2.4 Table 2: MMAA process accordingly 1131163953Srrs * to get into the OPEN state 1132163953Srrs */ 1133166023Srrs if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) { 1134166086Srrs#ifdef INVARIANTS 1135166023Srrs panic("Case D and non-match seq?"); 1136166086Srrs#else 1137166086Srrs printf("Case D, seq non-match %x vs %x?\n", 1138166086Srrs ntohl(initack_cp->init.initial_tsn), asoc->init_seq_number); 1139166086Srrs#endif 1140166023Srrs } 1141163953Srrs switch SCTP_GET_STATE 1142163953Srrs (asoc) { 1143163953Srrs case SCTP_STATE_COOKIE_WAIT: 1144166023Srrs case SCTP_STATE_COOKIE_ECHOED: 1145163953Srrs /* 1146163953Srrs * INIT was sent, but got got a COOKIE_ECHO with the 1147166023Srrs * correct tags... just accept it...but we must 1148166023Srrs * process the init so that we can make sure we have 1149166023Srrs * the right seq no's. 1150163953Srrs */ 1151163953Srrs /* First we must process the INIT !! */ 1152163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1153163953Srrs if (retval < 0) { 1154166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1155166023Srrs asoc->cookie_how[how_indx] = 3; 1156163953Srrs return (NULL); 1157163953Srrs } 1158163953Srrs /* we have already processed the INIT so no problem */ 1159163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, 1160165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_11); 1161165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_12); 1162163953Srrs /* update current state */ 1163166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) 1164166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1165166675Srrs else 1166166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1167163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1168166675Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1169163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1170163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1171163953Srrs 1172166675Srrs } else { 1173163953Srrs /* if ok, move to OPEN state */ 1174163953Srrs asoc->state = SCTP_STATE_OPEN; 1175163953Srrs } 1176166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1177165220Srrs sctp_stop_all_cookie_timers(stcb); 1178163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1179163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1180163953Srrs (inp->sctp_socket->so_qlimit == 0) 1181163953Srrs ) { 1182163953Srrs /* 1183163953Srrs * Here is where collision would go if we 1184163953Srrs * did a connect() and instead got a 1185163953Srrs * init/init-ack/cookie done before the 1186163953Srrs * init-ack came back.. 1187163953Srrs */ 1188163953Srrs stcb->sctp_ep->sctp_flags |= 1189163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1190163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1191163953Srrs } 1192163953Srrs /* notify upper layer */ 1193163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1194163953Srrs /* 1195163953Srrs * since we did not send a HB make sure we don't 1196163953Srrs * double things 1197163953Srrs */ 1198163953Srrs net->hb_responded = 1; 1199163953Srrs 1200163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1201163953Srrs (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) { 1202163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 1203163953Srrs inp, stcb, NULL); 1204163953Srrs } 1205163953Srrs break; 1206163953Srrs default: 1207163953Srrs /* 1208163953Srrs * we're in the OPEN state (or beyond), so peer must 1209163953Srrs * have simply lost the COOKIE-ACK 1210163953Srrs */ 1211166675Srrs 1212163953Srrs break; 1213163953Srrs } /* end switch */ 1214165220Srrs sctp_stop_all_cookie_timers(stcb); 1215163953Srrs /* 1216163953Srrs * We ignore the return code here.. not sure if we should 1217163953Srrs * somehow abort.. but we do have an existing asoc. This 1218163953Srrs * really should not fail. 1219163953Srrs */ 1220163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1221163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1222163953Srrs initack_offset, sh, init_src)) { 1223166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1224166023Srrs asoc->cookie_how[how_indx] = 4; 1225163953Srrs return (NULL); 1226163953Srrs } 1227163953Srrs /* respond with a COOKIE-ACK */ 1228165220Srrs sctp_toss_old_cookies(stcb, asoc); 1229163953Srrs sctp_send_cookie_ack(stcb); 1230166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1231166023Srrs asoc->cookie_how[how_indx] = 5; 1232163953Srrs return (stcb); 1233163953Srrs } /* end if */ 1234163953Srrs if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1235163953Srrs ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag && 1236163953Srrs cookie->tie_tag_my_vtag == 0 && 1237163953Srrs cookie->tie_tag_peer_vtag == 0) { 1238163953Srrs /* 1239163953Srrs * case C in Section 5.2.4 Table 2: XMOO silently discard 1240163953Srrs */ 1241166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1242166023Srrs asoc->cookie_how[how_indx] = 6; 1243163953Srrs return (NULL); 1244163953Srrs } 1245163953Srrs if (ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag && 1246163953Srrs (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag || 1247163953Srrs init_cp->init.initiate_tag == 0)) { 1248163953Srrs /* 1249163953Srrs * case B in Section 5.2.4 Table 2: MXAA or MOAA my info 1250163953Srrs * should be ok, re-accept peer info 1251163953Srrs */ 1252166023Srrs if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) { 1253166023Srrs /* 1254166023Srrs * Extension of case C. If we hit this, then the 1255166023Srrs * random number generator returned the same vtag 1256166023Srrs * when we first sent our INIT-ACK and when we later 1257166023Srrs * sent our INIT. The side with the seq numbers that 1258166023Srrs * are different will be the one that normnally 1259166023Srrs * would have hit case C. This in effect "extends" 1260166023Srrs * our vtags in this collision case to be 64 bits. 1261166023Srrs * The same collision could occur aka you get both 1262166023Srrs * vtag and seq number the same twice in a row.. but 1263166023Srrs * is much less likely. If it did happen then we 1264166023Srrs * would proceed through and bring up the assoc.. we 1265166023Srrs * may end up with the wrong stream setup however.. 1266166023Srrs * which would be bad.. but there is no way to 1267166023Srrs * tell.. until we send on a stream that does not 1268166023Srrs * exist :-) 1269166023Srrs */ 1270166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1271166023Srrs asoc->cookie_how[how_indx] = 7; 1272166023Srrs 1273166023Srrs return (NULL); 1274166023Srrs } 1275166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1276166023Srrs asoc->cookie_how[how_indx] = 8; 1277165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_13); 1278163953Srrs sctp_stop_all_cookie_timers(stcb); 1279163953Srrs /* 1280163953Srrs * since we did not send a HB make sure we don't double 1281163953Srrs * things 1282163953Srrs */ 1283163953Srrs net->hb_responded = 1; 1284163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1285163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1286163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1287163953Srrs NULL); 1288163953Srrs } 1289163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1290164205Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1291164205Srrs 1292164205Srrs /* Note last_cwr_tsn? where is this used? */ 1293163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1294164205Srrs if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) { 1295164205Srrs /* 1296164205Srrs * Ok the peer probably discarded our data (if we 1297164205Srrs * echoed a cookie+data). So anything on the 1298164205Srrs * sent_queue should be marked for retransmit, we 1299164205Srrs * may not get something to kick us so it COULD 1300164205Srrs * still take a timeout to move these.. but it can't 1301164205Srrs * hurt to mark them. 1302164205Srrs */ 1303164205Srrs struct sctp_tmit_chunk *chk; 1304163953Srrs 1305164205Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1306164205Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 1307164205Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1308164205Srrs stcb->asoc.sent_queue_retran_cnt++; 1309164205Srrs spec_flag++; 1310164205Srrs } 1311164205Srrs } 1312164205Srrs 1313164205Srrs } 1314163953Srrs /* process the INIT info (peer's info) */ 1315163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1316163953Srrs if (retval < 0) { 1317166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1318166023Srrs asoc->cookie_how[how_indx] = 9; 1319163953Srrs return (NULL); 1320163953Srrs } 1321163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1322163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1323163953Srrs initack_offset, sh, init_src)) { 1324166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1325166023Srrs asoc->cookie_how[how_indx] = 10; 1326163953Srrs return (NULL); 1327163953Srrs } 1328163953Srrs if ((asoc->state & SCTP_STATE_COOKIE_WAIT) || 1329163953Srrs (asoc->state & SCTP_STATE_COOKIE_ECHOED)) { 1330163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1331163953Srrs 1332163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1333163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1334163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1335163953Srrs stcb->sctp_ep->sctp_flags |= 1336163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1337163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1338163953Srrs } 1339166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) 1340166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1341166675Srrs else 1342166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1343166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1344166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1345166675Srrs } else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 1346166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_restartestab); 1347166675Srrs } else { 1348166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1349163953Srrs } 1350163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1351166675Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1352163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1353163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1354163953Srrs 1355163953Srrs } else { 1356163953Srrs asoc->state = SCTP_STATE_OPEN; 1357163953Srrs } 1358163953Srrs sctp_stop_all_cookie_timers(stcb); 1359165220Srrs sctp_toss_old_cookies(stcb, asoc); 1360163953Srrs sctp_send_cookie_ack(stcb); 1361164205Srrs if (spec_flag) { 1362164205Srrs /* 1363164205Srrs * only if we have retrans set do we do this. What 1364164205Srrs * this call does is get only the COOKIE-ACK out and 1365164205Srrs * then when we return the normal call to 1366164205Srrs * sctp_chunk_output will get the retrans out behind 1367164205Srrs * this. 1368164205Srrs */ 1369164205Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK); 1370164205Srrs } 1371166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1372166023Srrs asoc->cookie_how[how_indx] = 11; 1373166023Srrs 1374163953Srrs return (stcb); 1375163953Srrs } 1376163953Srrs if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1377163953Srrs ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) && 1378163953Srrs cookie->tie_tag_my_vtag == asoc->my_vtag_nonce && 1379163953Srrs cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce && 1380163953Srrs cookie->tie_tag_peer_vtag != 0) { 1381163953Srrs struct sctpasochead *head; 1382163953Srrs 1383163953Srrs /* 1384163953Srrs * case A in Section 5.2.4 Table 2: XXMM (peer restarted) 1385163953Srrs */ 1386165220Srrs /* temp code */ 1387166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1388166023Srrs asoc->cookie_how[how_indx] = 12; 1389165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_14); 1390165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_15); 1391165647Srrs 1392163953Srrs *sac_assoc_id = sctp_get_associd(stcb); 1393163953Srrs /* notify upper layer */ 1394163953Srrs *notification = SCTP_NOTIFY_ASSOC_RESTART; 1395165220Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1396166675Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) && 1397166675Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 1398166675Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) { 1399166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1400166675Srrs } 1401166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 1402166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_restartestab); 1403166675Srrs } else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) { 1404166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_collisionestab); 1405166675Srrs } 1406165647Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1407165647Srrs asoc->state = SCTP_STATE_OPEN | 1408165647Srrs SCTP_STATE_SHUTDOWN_PENDING; 1409165647Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1410165647Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1411165647Srrs 1412165647Srrs } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) { 1413165647Srrs /* move to OPEN state, if not in SHUTDOWN_SENT */ 1414165647Srrs asoc->state = SCTP_STATE_OPEN; 1415165647Srrs } 1416165647Srrs asoc->pre_open_streams = 1417165647Srrs ntohs(initack_cp->init.num_outbound_streams); 1418165647Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1419165647Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1420165647Srrs 1421165647Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1422165647Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1423165647Srrs 1424165647Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1425165647Srrs 1426165647Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1427165647Srrs if (asoc->mapping_array) 1428165647Srrs memset(asoc->mapping_array, 0, 1429165647Srrs asoc->mapping_array_size); 1430165220Srrs SCTP_TCB_UNLOCK(stcb); 1431165220Srrs SCTP_INP_INFO_WLOCK(); 1432165220Srrs SCTP_INP_WLOCK(stcb->sctp_ep); 1433165220Srrs SCTP_TCB_LOCK(stcb); 1434165220Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1435163953Srrs /* send up all the data */ 1436164205Srrs SCTP_TCB_SEND_LOCK(stcb); 1437165220Srrs 1438164205Srrs sctp_report_all_outbound(stcb, 1); 1439165220Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1440165220Srrs stcb->asoc.strmout[i].stream_no = i; 1441165220Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 1442165220Srrs stcb->asoc.strmout[i].last_msg_incomplete = 0; 1443165220Srrs } 1444163953Srrs /* process the INIT-ACK info (my info) */ 1445163953Srrs asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1446163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1447163953Srrs 1448163953Srrs /* pull from vtag hash */ 1449163953Srrs LIST_REMOVE(stcb, sctp_asocs); 1450163953Srrs /* re-insert to new vtag position */ 1451163953Srrs head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 1452163953Srrs sctppcbinfo.hashasocmark)]; 1453163953Srrs /* 1454163953Srrs * put it in the bucket in the vtag hash of assoc's for the 1455163953Srrs * system 1456163953Srrs */ 1457163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_asocs); 1458163953Srrs 1459163953Srrs /* Is this the first restart? */ 1460163953Srrs if (stcb->asoc.in_restart_hash == 0) { 1461163953Srrs /* Ok add it to assoc_id vtag hash */ 1462163953Srrs head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 1463163953Srrs sctppcbinfo.hashrestartmark)]; 1464163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_tcbrestarhash); 1465163953Srrs stcb->asoc.in_restart_hash = 1; 1466163953Srrs } 1467163953Srrs /* process the INIT info (peer's info) */ 1468164205Srrs SCTP_TCB_SEND_UNLOCK(stcb); 1469165220Srrs SCTP_INP_WUNLOCK(stcb->sctp_ep); 1470165220Srrs SCTP_INP_INFO_WUNLOCK(); 1471165220Srrs 1472163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1473163953Srrs if (retval < 0) { 1474166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1475166023Srrs asoc->cookie_how[how_indx] = 13; 1476166023Srrs 1477163953Srrs return (NULL); 1478163953Srrs } 1479163953Srrs /* 1480163953Srrs * since we did not send a HB make sure we don't double 1481163953Srrs * things 1482163953Srrs */ 1483163953Srrs net->hb_responded = 1; 1484163953Srrs 1485163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1486163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1487163953Srrs initack_offset, sh, init_src)) { 1488166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1489166023Srrs asoc->cookie_how[how_indx] = 14; 1490166023Srrs 1491163953Srrs return (NULL); 1492163953Srrs } 1493163953Srrs /* respond with a COOKIE-ACK */ 1494163953Srrs sctp_stop_all_cookie_timers(stcb); 1495165220Srrs sctp_toss_old_cookies(stcb, asoc); 1496163953Srrs sctp_send_cookie_ack(stcb); 1497166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1498166023Srrs asoc->cookie_how[how_indx] = 15; 1499163953Srrs 1500163953Srrs return (stcb); 1501163953Srrs } 1502166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1503166023Srrs asoc->cookie_how[how_indx] = 16; 1504163953Srrs /* all other cases... */ 1505163953Srrs return (NULL); 1506163953Srrs} 1507163953Srrs 1508166086Srrs 1509163953Srrs/* 1510163953Srrs * handle a state cookie for a new association m: input packet mbuf chain-- 1511163953Srrs * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf 1512163953Srrs * and the cookie signature does not exist offset: offset into mbuf to the 1513163953Srrs * cookie-echo chunk length: length of the cookie chunk to: where the init 1514163953Srrs * was from returns a new TCB 1515163953Srrs */ 1516163953Srrsstatic struct sctp_tcb * 1517163953Srrssctp_process_cookie_new(struct mbuf *m, int iphlen, int offset, 1518163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1519163953Srrs struct sctp_inpcb *inp, struct sctp_nets **netp, 1520163953Srrs struct sockaddr *init_src, int *notification, 1521163953Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len) 1522163953Srrs{ 1523163953Srrs struct sctp_tcb *stcb; 1524163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1525163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1526163953Srrs struct sockaddr_storage sa_store; 1527163953Srrs struct sockaddr *initack_src = (struct sockaddr *)&sa_store; 1528163953Srrs struct sockaddr_in *sin; 1529163953Srrs struct sockaddr_in6 *sin6; 1530163953Srrs struct sctp_association *asoc; 1531163953Srrs int chk_length; 1532163953Srrs int init_offset, initack_offset, initack_limit; 1533163953Srrs int retval; 1534163953Srrs int error = 0; 1535163953Srrs uint32_t old_tag; 1536166675Srrs uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE]; 1537163953Srrs 1538163953Srrs /* 1539163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1540163953Srrs * INIT should start after the cookie-echo header struct (chunk 1541163953Srrs * header, state cookie header struct) 1542163953Srrs */ 1543163953Srrs init_offset = offset + sizeof(struct sctp_cookie_echo_chunk); 1544163953Srrs init_cp = (struct sctp_init_chunk *) 1545163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1546163953Srrs (uint8_t *) & init_buf); 1547163953Srrs if (init_cp == NULL) { 1548163953Srrs /* could not pull a INIT chunk in cookie */ 1549163953Srrs#ifdef SCTP_DEBUG 1550163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1551163953Srrs printf("process_cookie_new: could not pull INIT chunk hdr\n"); 1552163953Srrs } 1553163953Srrs#endif /* SCTP_DEBUG */ 1554163953Srrs return (NULL); 1555163953Srrs } 1556163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1557163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1558163953Srrs#ifdef SCTP_DEBUG 1559163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1560163953Srrs printf("HUH? process_cookie_new: could not find INIT chunk!\n"); 1561163953Srrs } 1562163953Srrs#endif /* SCTP_DEBUG */ 1563163953Srrs return (NULL); 1564163953Srrs } 1565163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1566163953Srrs /* 1567163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1568163953Srrs * INIT-ACK follows the INIT chunk 1569163953Srrs */ 1570163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1571163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1572163953Srrs (uint8_t *) & initack_buf); 1573163953Srrs if (initack_cp == NULL) { 1574163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1575163953Srrs#ifdef SCTP_DEBUG 1576163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1577163953Srrs printf("process_cookie_new: could not pull INIT-ACK chunk hdr\n"); 1578163953Srrs } 1579163953Srrs#endif /* SCTP_DEBUG */ 1580163953Srrs return (NULL); 1581163953Srrs } 1582163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1583163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1584163953Srrs return (NULL); 1585163953Srrs } 1586163953Srrs /* 1587163953Srrs * NOTE: We can't use the INIT_ACK's chk_length to determine the 1588163953Srrs * "initack_limit" value. This is because the chk_length field 1589163953Srrs * includes the length of the cookie, but the cookie is omitted when 1590163953Srrs * the INIT and INIT_ACK are tacked onto the cookie... 1591163953Srrs */ 1592163953Srrs initack_limit = offset + cookie_len; 1593163953Srrs 1594163953Srrs /* 1595163953Srrs * now that we know the INIT/INIT-ACK are in place, create a new TCB 1596163953Srrs * and popluate 1597163953Srrs */ 1598163953Srrs stcb = sctp_aloc_assoc(inp, init_src, 0, &error, 1599163953Srrs ntohl(initack_cp->init.initiate_tag)); 1600163953Srrs if (stcb == NULL) { 1601163953Srrs struct mbuf *op_err; 1602163953Srrs 1603163953Srrs /* memory problem? */ 1604163953Srrs#ifdef SCTP_DEBUG 1605163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1606163953Srrs printf("process_cookie_new: no room for another TCB!\n"); 1607163953Srrs } 1608163953Srrs#endif /* SCTP_DEBUG */ 1609163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1610163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1611163953Srrs sh, op_err); 1612163953Srrs return (NULL); 1613163953Srrs } 1614163953Srrs /* get the correct sctp_nets */ 1615163953Srrs *netp = sctp_findnet(stcb, init_src); 1616163953Srrs asoc = &stcb->asoc; 1617163953Srrs /* get scope variables out of cookie */ 1618163953Srrs asoc->ipv4_local_scope = cookie->ipv4_scope; 1619163953Srrs asoc->site_scope = cookie->site_scope; 1620163953Srrs asoc->local_scope = cookie->local_scope; 1621163953Srrs asoc->loopback_scope = cookie->loopback_scope; 1622163953Srrs 1623163953Srrs if ((asoc->ipv4_addr_legal != cookie->ipv4_addr_legal) || 1624163953Srrs (asoc->ipv6_addr_legal != cookie->ipv6_addr_legal)) { 1625163953Srrs struct mbuf *op_err; 1626163953Srrs 1627163953Srrs /* 1628163953Srrs * Houston we have a problem. The EP changed while the 1629163953Srrs * cookie was in flight. Only recourse is to abort the 1630163953Srrs * association. 1631163953Srrs */ 1632163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1633163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1634163953Srrs sh, op_err); 1635163953Srrs return (NULL); 1636163953Srrs } 1637163953Srrs /* process the INIT-ACK info (my info) */ 1638163953Srrs old_tag = asoc->my_vtag; 1639163953Srrs asoc->assoc_id = asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1640163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1641163953Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1642163953Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1643163953Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1644163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1645163953Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1646163953Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1647163953Srrs 1648163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1649163953Srrs 1650163953Srrs /* process the INIT info (peer's info) */ 1651163953Srrs retval = sctp_process_init(init_cp, stcb, *netp); 1652163953Srrs if (retval < 0) { 1653165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16); 1654163953Srrs return (NULL); 1655163953Srrs } 1656163953Srrs /* load all addresses */ 1657163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1658163953Srrs init_offset + sizeof(struct sctp_init_chunk), initack_offset, sh, 1659163953Srrs init_src)) { 1660165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_17); 1661163953Srrs return (NULL); 1662163953Srrs } 1663163953Srrs /* 1664163953Srrs * verify any preceding AUTH chunk that was skipped 1665163953Srrs */ 1666163953Srrs /* pull the local authentication parameters from the cookie/init-ack */ 1667163953Srrs sctp_auth_get_cookie_params(stcb, m, 1668163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1669163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk))); 1670163953Srrs if (auth_skipped) { 1671163953Srrs struct sctp_auth_chunk *auth; 1672163953Srrs 1673163953Srrs auth = (struct sctp_auth_chunk *) 1674166675Srrs sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf); 1675163953Srrs if (sctp_handle_auth(stcb, auth, m, auth_offset)) { 1676163953Srrs /* auth HMAC failed, dump the assoc and packet */ 1677163953Srrs#ifdef SCTP_DEBUG 1678163953Srrs if (sctp_debug_on & SCTP_DEBUG_AUTH1) 1679163953Srrs printf("COOKIE-ECHO: AUTH failed\n"); 1680163953Srrs#endif /* SCTP_DEBUG */ 1681165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_18); 1682163953Srrs return (NULL); 1683163953Srrs } else { 1684163953Srrs /* remaining chunks checked... good to go */ 1685163953Srrs stcb->asoc.authenticated = 1; 1686163953Srrs } 1687163953Srrs } 1688163953Srrs /* update current state */ 1689163953Srrs#ifdef SCTP_DEBUG 1690163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1691163953Srrs printf("moving to OPEN state\n"); 1692163953Srrs } 1693163953Srrs#endif 1694163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1695163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1696163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1697163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1698163953Srrs } else { 1699163953Srrs asoc->state = SCTP_STATE_OPEN; 1700163953Srrs } 1701165220Srrs sctp_stop_all_cookie_timers(stcb); 1702163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_passiveestab); 1703163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1704163953Srrs 1705163953Srrs /* 1706163953Srrs * if we're doing ASCONFs, check to see if we have any new local 1707163953Srrs * addresses that need to get added to the peer (eg. addresses 1708163953Srrs * changed while cookie echo in flight). This needs to be done 1709163953Srrs * after we go to the OPEN state to do the correct asconf 1710163953Srrs * processing. else, make sure we have the correct addresses in our 1711163953Srrs * lists 1712163953Srrs */ 1713163953Srrs 1714163953Srrs /* warning, we re-use sin, sin6, sa_store here! */ 1715163953Srrs /* pull in local_address (our "from" address) */ 1716163953Srrs if (cookie->laddr_type == SCTP_IPV4_ADDRESS) { 1717163953Srrs /* source addr is IPv4 */ 1718163953Srrs sin = (struct sockaddr_in *)initack_src; 1719163953Srrs memset(sin, 0, sizeof(*sin)); 1720163953Srrs sin->sin_family = AF_INET; 1721163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 1722163953Srrs sin->sin_addr.s_addr = cookie->laddress[0]; 1723163953Srrs } else if (cookie->laddr_type == SCTP_IPV6_ADDRESS) { 1724163953Srrs /* source addr is IPv6 */ 1725163953Srrs sin6 = (struct sockaddr_in6 *)initack_src; 1726163953Srrs memset(sin6, 0, sizeof(*sin6)); 1727163953Srrs sin6->sin6_family = AF_INET6; 1728163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1729163953Srrs sin6->sin6_scope_id = cookie->scope_id; 1730163953Srrs memcpy(&sin6->sin6_addr, cookie->laddress, 1731163953Srrs sizeof(sin6->sin6_addr)); 1732163953Srrs } else { 1733165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_19); 1734163953Srrs return (NULL); 1735163953Srrs } 1736163953Srrs 1737163953Srrs sctp_check_address_list(stcb, m, 1738163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1739163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)), 1740163953Srrs initack_src, cookie->local_scope, cookie->site_scope, 1741163953Srrs cookie->ipv4_scope, cookie->loopback_scope); 1742163953Srrs 1743163953Srrs 1744163953Srrs /* set up to notify upper layer */ 1745163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1746163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1747163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1748163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1749163953Srrs /* 1750163953Srrs * This is an endpoint that called connect() how it got a 1751163953Srrs * cookie that is NEW is a bit of a mystery. It must be that 1752163953Srrs * the INIT was sent, but before it got there.. a complete 1753163953Srrs * INIT/INIT-ACK/COOKIE arrived. But of course then it 1754163953Srrs * should have went to the other code.. not here.. oh well.. 1755163953Srrs * a bit of protection is worth having.. 1756163953Srrs */ 1757163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1758163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1759163953Srrs } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 1760163953Srrs (inp->sctp_socket->so_qlimit)) { 1761163953Srrs /* 1762163953Srrs * We don't want to do anything with this one. Since it is 1763163953Srrs * the listening guy. The timer will get started for 1764163953Srrs * accepted connections in the caller. 1765163953Srrs */ 1766163953Srrs ; 1767163953Srrs } 1768163953Srrs /* since we did not send a HB make sure we don't double things */ 1769163953Srrs (*netp)->hb_responded = 1; 1770163953Srrs 1771163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1772163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1773163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL); 1774163953Srrs } 1775163953Srrs /* respond with a COOKIE-ACK */ 1776165220Srrs /* calculate the RTT */ 1777165220Srrs (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp, 1778165220Srrs &cookie->time_entered); 1779163953Srrs sctp_send_cookie_ack(stcb); 1780163953Srrs return (stcb); 1781163953Srrs} 1782163953Srrs 1783163953Srrs 1784163953Srrs/* 1785163953Srrs * handles a COOKIE-ECHO message stcb: modified to either a new or left as 1786163953Srrs * existing (non-NULL) TCB 1787163953Srrs */ 1788163953Srrsstatic struct mbuf * 1789163953Srrssctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset, 1790163953Srrs struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp, 1791163953Srrs struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp, 1792165220Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len, struct sctp_tcb **locked_tcb) 1793163953Srrs{ 1794163953Srrs struct sctp_state_cookie *cookie; 1795163953Srrs struct sockaddr_in6 sin6; 1796163953Srrs struct sockaddr_in sin; 1797163953Srrs struct sctp_tcb *l_stcb = *stcb; 1798163953Srrs struct sctp_inpcb *l_inp; 1799163953Srrs struct sockaddr *to; 1800163953Srrs sctp_assoc_t sac_restart_id; 1801163953Srrs struct sctp_pcb *ep; 1802163953Srrs struct mbuf *m_sig; 1803163953Srrs uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE]; 1804163953Srrs uint8_t *sig; 1805163953Srrs uint8_t cookie_ok = 0; 1806163953Srrs unsigned int size_of_pkt, sig_offset, cookie_offset; 1807163953Srrs unsigned int cookie_len; 1808163953Srrs struct timeval now; 1809163953Srrs struct timeval time_expires; 1810163953Srrs struct sockaddr_storage dest_store; 1811163953Srrs struct sockaddr *localep_sa = (struct sockaddr *)&dest_store; 1812163953Srrs struct ip *iph; 1813163953Srrs int notification = 0; 1814163953Srrs struct sctp_nets *netl; 1815163953Srrs int had_a_existing_tcb = 0; 1816163953Srrs 1817163953Srrs#ifdef SCTP_DEBUG 1818163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 1819163953Srrs printf("sctp_handle_cookie: handling COOKIE-ECHO\n"); 1820163953Srrs } 1821163953Srrs#endif 1822163953Srrs 1823163953Srrs if (inp_p == NULL) { 1824163953Srrs return (NULL); 1825163953Srrs } 1826163953Srrs /* First get the destination address setup too. */ 1827163953Srrs iph = mtod(m, struct ip *); 1828163953Srrs if (iph->ip_v == IPVERSION) { 1829163953Srrs /* its IPv4 */ 1830163953Srrs struct sockaddr_in *sin; 1831163953Srrs 1832163953Srrs sin = (struct sockaddr_in *)(localep_sa); 1833163953Srrs memset(sin, 0, sizeof(*sin)); 1834163953Srrs sin->sin_family = AF_INET; 1835163953Srrs sin->sin_len = sizeof(*sin); 1836163953Srrs sin->sin_port = sh->dest_port; 1837163953Srrs sin->sin_addr.s_addr = iph->ip_dst.s_addr; 1838165647Srrs size_of_pkt = SCTP_GET_IPV4_LENGTH(iph); 1839163953Srrs } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1840163953Srrs /* its IPv6 */ 1841163953Srrs struct ip6_hdr *ip6; 1842163953Srrs struct sockaddr_in6 *sin6; 1843163953Srrs 1844163953Srrs sin6 = (struct sockaddr_in6 *)(localep_sa); 1845163953Srrs memset(sin6, 0, sizeof(*sin6)); 1846163953Srrs sin6->sin6_family = AF_INET6; 1847163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1848163953Srrs ip6 = mtod(m, struct ip6_hdr *); 1849163953Srrs sin6->sin6_port = sh->dest_port; 1850163953Srrs sin6->sin6_addr = ip6->ip6_dst; 1851166675Srrs size_of_pkt = SCTP_GET_IPV6_LENGTH(ip6) + iphlen; 1852163953Srrs } else { 1853163953Srrs return (NULL); 1854163953Srrs } 1855163953Srrs 1856163953Srrs cookie = &cp->cookie; 1857163953Srrs cookie_offset = offset + sizeof(struct sctp_chunkhdr); 1858163953Srrs cookie_len = ntohs(cp->ch.chunk_length); 1859163953Srrs 1860163953Srrs if ((cookie->peerport != sh->src_port) && 1861163953Srrs (cookie->myport != sh->dest_port) && 1862163953Srrs (cookie->my_vtag != sh->v_tag)) { 1863163953Srrs /* 1864163953Srrs * invalid ports or bad tag. Note that we always leave the 1865163953Srrs * v_tag in the header in network order and when we stored 1866163953Srrs * it in the my_vtag slot we also left it in network order. 1867163953Srrs * This maintians the match even though it may be in the 1868163953Srrs * opposite byte order of the machine :-> 1869163953Srrs */ 1870163953Srrs return (NULL); 1871163953Srrs } 1872163953Srrs if (cookie_len > size_of_pkt || 1873163953Srrs cookie_len < sizeof(struct sctp_cookie_echo_chunk) + 1874163953Srrs sizeof(struct sctp_init_chunk) + 1875163953Srrs sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) { 1876163953Srrs /* cookie too long! or too small */ 1877163953Srrs return (NULL); 1878163953Srrs } 1879163953Srrs /* 1880163953Srrs * split off the signature into its own mbuf (since it should not be 1881163953Srrs * calculated in the sctp_hmac_m() call). 1882163953Srrs */ 1883163953Srrs sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE; 1884163953Srrs if (sig_offset > size_of_pkt) { 1885163953Srrs /* packet not correct size! */ 1886163953Srrs /* XXX this may already be accounted for earlier... */ 1887163953Srrs return (NULL); 1888163953Srrs } 1889163953Srrs m_sig = m_split(m, sig_offset, M_DONTWAIT); 1890163953Srrs if (m_sig == NULL) { 1891163953Srrs /* out of memory or ?? */ 1892163953Srrs return (NULL); 1893163953Srrs } 1894163953Srrs /* 1895163953Srrs * compute the signature/digest for the cookie 1896163953Srrs */ 1897163953Srrs ep = &(*inp_p)->sctp_ep; 1898163953Srrs l_inp = *inp_p; 1899163953Srrs if (l_stcb) { 1900163953Srrs SCTP_TCB_UNLOCK(l_stcb); 1901163953Srrs } 1902163953Srrs SCTP_INP_RLOCK(l_inp); 1903163953Srrs if (l_stcb) { 1904163953Srrs SCTP_TCB_LOCK(l_stcb); 1905163953Srrs } 1906163953Srrs /* which cookie is it? */ 1907163953Srrs if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) && 1908163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1909163953Srrs /* it's the old cookie */ 1910163953Srrs sctp_hmac_m(SCTP_HMAC, 1911163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1912163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1913163953Srrs } else { 1914163953Srrs /* it's the current cookie */ 1915163953Srrs sctp_hmac_m(SCTP_HMAC, 1916163953Srrs (uint8_t *) ep->secret_key[(int)ep->current_secret_number], 1917163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1918163953Srrs } 1919163953Srrs /* get the signature */ 1920163953Srrs SCTP_INP_RUNLOCK(l_inp); 1921163953Srrs sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig); 1922163953Srrs if (sig == NULL) { 1923163953Srrs /* couldn't find signature */ 1924164085Srrs sctp_m_freem(m_sig); 1925163953Srrs return (NULL); 1926163953Srrs } 1927163953Srrs /* compare the received digest with the computed digest */ 1928163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) { 1929163953Srrs /* try the old cookie? */ 1930163953Srrs if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) && 1931163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1932163953Srrs /* compute digest with old */ 1933163953Srrs sctp_hmac_m(SCTP_HMAC, 1934163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1935163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1936163953Srrs /* compare */ 1937163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0) 1938163953Srrs cookie_ok = 1; 1939163953Srrs } 1940163953Srrs } else { 1941163953Srrs cookie_ok = 1; 1942163953Srrs } 1943163953Srrs 1944163953Srrs /* 1945163953Srrs * Now before we continue we must reconstruct our mbuf so that 1946163953Srrs * normal processing of any other chunks will work. 1947163953Srrs */ 1948163953Srrs { 1949163953Srrs struct mbuf *m_at; 1950163953Srrs 1951163953Srrs m_at = m; 1952165647Srrs while (SCTP_BUF_NEXT(m_at) != NULL) { 1953165647Srrs m_at = SCTP_BUF_NEXT(m_at); 1954163953Srrs } 1955165647Srrs SCTP_BUF_NEXT(m_at) = m_sig; 1956163953Srrs } 1957163953Srrs 1958163953Srrs if (cookie_ok == 0) { 1959163953Srrs#ifdef SCTP_DEBUG 1960163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 1961163953Srrs printf("handle_cookie_echo: cookie signature validation failed!\n"); 1962163953Srrs printf("offset = %u, cookie_offset = %u, sig_offset = %u\n", 1963163953Srrs (uint32_t) offset, cookie_offset, sig_offset); 1964163953Srrs } 1965163953Srrs#endif 1966163953Srrs return (NULL); 1967163953Srrs } 1968163953Srrs /* 1969163953Srrs * check the cookie timestamps to be sure it's not stale 1970163953Srrs */ 1971163953Srrs SCTP_GETTIME_TIMEVAL(&now); 1972163953Srrs /* Expire time is in Ticks, so we convert to seconds */ 1973163953Srrs time_expires.tv_sec = cookie->time_entered.tv_sec + cookie->cookie_life; 1974163953Srrs time_expires.tv_usec = cookie->time_entered.tv_usec; 1975163953Srrs if (timevalcmp(&now, &time_expires, >)) { 1976163953Srrs /* cookie is stale! */ 1977163953Srrs struct mbuf *op_err; 1978163953Srrs struct sctp_stale_cookie_msg *scm; 1979163953Srrs uint32_t tim; 1980163953Srrs 1981163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_stale_cookie_msg), 1982165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 1983163953Srrs if (op_err == NULL) { 1984163953Srrs /* FOOBAR */ 1985163953Srrs return (NULL); 1986163953Srrs } 1987163953Srrs /* pre-reserve some space */ 1988165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 1989165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 1990165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 1991163953Srrs 1992163953Srrs /* Set the len */ 1993165647Srrs SCTP_BUF_LEN(op_err) = sizeof(struct sctp_stale_cookie_msg); 1994163953Srrs scm = mtod(op_err, struct sctp_stale_cookie_msg *); 1995163953Srrs scm->ph.param_type = htons(SCTP_CAUSE_STALE_COOKIE); 1996163953Srrs scm->ph.param_length = htons((sizeof(struct sctp_paramhdr) + 1997163953Srrs (sizeof(uint32_t)))); 1998163953Srrs /* seconds to usec */ 1999163953Srrs tim = (now.tv_sec - time_expires.tv_sec) * 1000000; 2000163953Srrs /* add in usec */ 2001163953Srrs if (tim == 0) 2002163953Srrs tim = now.tv_usec - cookie->time_entered.tv_usec; 2003163953Srrs scm->time_usec = htonl(tim); 2004163953Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag); 2005163953Srrs return (NULL); 2006163953Srrs } 2007163953Srrs /* 2008163953Srrs * Now we must see with the lookup address if we have an existing 2009163953Srrs * asoc. This will only happen if we were in the COOKIE-WAIT state 2010163953Srrs * and a INIT collided with us and somewhere the peer sent the 2011163953Srrs * cookie on another address besides the single address our assoc 2012163953Srrs * had for him. In this case we will have one of the tie-tags set at 2013163953Srrs * least AND the address field in the cookie can be used to look it 2014163953Srrs * up. 2015163953Srrs */ 2016163953Srrs to = NULL; 2017163953Srrs if (cookie->addr_type == SCTP_IPV6_ADDRESS) { 2018163953Srrs memset(&sin6, 0, sizeof(sin6)); 2019163953Srrs sin6.sin6_family = AF_INET6; 2020163953Srrs sin6.sin6_len = sizeof(sin6); 2021163953Srrs sin6.sin6_port = sh->src_port; 2022163953Srrs sin6.sin6_scope_id = cookie->scope_id; 2023163953Srrs memcpy(&sin6.sin6_addr.s6_addr, cookie->address, 2024163953Srrs sizeof(sin6.sin6_addr.s6_addr)); 2025163953Srrs to = (struct sockaddr *)&sin6; 2026163953Srrs } else if (cookie->addr_type == SCTP_IPV4_ADDRESS) { 2027163953Srrs memset(&sin, 0, sizeof(sin)); 2028163953Srrs sin.sin_family = AF_INET; 2029163953Srrs sin.sin_len = sizeof(sin); 2030163953Srrs sin.sin_port = sh->src_port; 2031163953Srrs sin.sin_addr.s_addr = cookie->address[0]; 2032163953Srrs to = (struct sockaddr *)&sin; 2033163953Srrs } 2034163953Srrs if ((*stcb == NULL) && to) { 2035163953Srrs /* Yep, lets check */ 2036163953Srrs *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, localep_sa, NULL); 2037163953Srrs if (*stcb == NULL) { 2038163953Srrs /* 2039163953Srrs * We should have only got back the same inp. If we 2040163953Srrs * got back a different ep we have a problem. The 2041163953Srrs * original findep got back l_inp and now 2042163953Srrs */ 2043163953Srrs if (l_inp != *inp_p) { 2044163953Srrs printf("Bad problem find_ep got a diff inp then special_locate?\n"); 2045163953Srrs } 2046165220Srrs } else { 2047165220Srrs if (*locked_tcb == NULL) { 2048165220Srrs /* 2049165220Srrs * In this case we found the assoc only 2050165220Srrs * after we locked the create lock. This 2051165220Srrs * means we are in a colliding case and we 2052165220Srrs * must make sure that we unlock the tcb if 2053165220Srrs * its one of the cases where we throw away 2054165220Srrs * the incoming packets. 2055165220Srrs */ 2056165220Srrs *locked_tcb = *stcb; 2057165220Srrs 2058165220Srrs /* 2059165220Srrs * We must also increment the inp ref count 2060165220Srrs * since the ref_count flags was set when we 2061165220Srrs * did not find the TCB, now we found it 2062165220Srrs * which reduces the refcount.. we must 2063165220Srrs * raise it back out to balance it all :-) 2064165220Srrs */ 2065165220Srrs SCTP_INP_INCR_REF((*stcb)->sctp_ep); 2066165220Srrs if ((*stcb)->sctp_ep != l_inp) { 2067165220Srrs printf("Huh? ep:%p diff then l_inp:%p?\n", 2068165220Srrs (*stcb)->sctp_ep, l_inp); 2069165220Srrs } 2070165220Srrs } 2071163953Srrs } 2072163953Srrs } 2073163953Srrs cookie_len -= SCTP_SIGNATURE_SIZE; 2074163953Srrs if (*stcb == NULL) { 2075163953Srrs /* this is the "normal" case... get a new TCB */ 2076163953Srrs *stcb = sctp_process_cookie_new(m, iphlen, offset, sh, cookie, 2077163953Srrs cookie_len, *inp_p, netp, to, ¬ification, 2078163953Srrs auth_skipped, auth_offset, auth_len); 2079163953Srrs } else { 2080163953Srrs /* this is abnormal... cookie-echo on existing TCB */ 2081163953Srrs had_a_existing_tcb = 1; 2082163953Srrs *stcb = sctp_process_cookie_existing(m, iphlen, offset, sh, 2083163953Srrs cookie, cookie_len, *inp_p, *stcb, *netp, to, ¬ification, 2084163953Srrs &sac_restart_id); 2085163953Srrs } 2086163953Srrs 2087163953Srrs if (*stcb == NULL) { 2088163953Srrs /* still no TCB... must be bad cookie-echo */ 2089163953Srrs return (NULL); 2090163953Srrs } 2091163953Srrs /* 2092163953Srrs * Ok, we built an association so confirm the address we sent the 2093163953Srrs * INIT-ACK to. 2094163953Srrs */ 2095163953Srrs netl = sctp_findnet(*stcb, to); 2096163953Srrs /* 2097163953Srrs * This code should in theory NOT run but 2098163953Srrs */ 2099163953Srrs if (netl == NULL) { 2100163953Srrs /* TSNH! Huh, why do I need to add this address here? */ 2101163953Srrs int ret; 2102163953Srrs 2103165220Srrs ret = sctp_add_remote_addr(*stcb, to, SCTP_DONOT_SETSCOPE, 2104165220Srrs SCTP_IN_COOKIE_PROC); 2105163953Srrs netl = sctp_findnet(*stcb, to); 2106163953Srrs } 2107163953Srrs if (netl) { 2108163953Srrs if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) { 2109163953Srrs netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 2110163953Srrs sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL, 2111163953Srrs netl); 2112163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 2113163953Srrs (*stcb), 0, (void *)netl); 2114163953Srrs } 2115163953Srrs } 2116163953Srrs if (*stcb) { 2117163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, *inp_p, 2118163953Srrs *stcb, NULL); 2119163953Srrs } 2120163953Srrs if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 2121163953Srrs if (!had_a_existing_tcb || 2122163953Srrs (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 2123163953Srrs /* 2124163953Srrs * If we have a NEW cookie or the connect never 2125163953Srrs * reached the connected state during collision we 2126163953Srrs * must do the TCP accept thing. 2127163953Srrs */ 2128163953Srrs struct socket *so, *oso; 2129163953Srrs struct sctp_inpcb *inp; 2130163953Srrs 2131163953Srrs if (notification == SCTP_NOTIFY_ASSOC_RESTART) { 2132163953Srrs /* 2133163953Srrs * For a restart we will keep the same 2134163953Srrs * socket, no need to do anything. I THINK!! 2135163953Srrs */ 2136163953Srrs sctp_ulp_notify(notification, *stcb, 0, (void *)&sac_restart_id); 2137163953Srrs return (m); 2138163953Srrs } 2139163953Srrs oso = (*inp_p)->sctp_socket; 2140163953Srrs /* 2141163953Srrs * We do this to keep the sockets side happy durin 2142163953Srrs * the sonewcon ONLY. 2143163953Srrs */ 2144163953Srrs NET_LOCK_GIANT(); 2145163953Srrs SCTP_TCB_UNLOCK((*stcb)); 2146166086Srrs so = sonewconn(oso, 0 2147163953Srrs ); 2148163953Srrs NET_UNLOCK_GIANT(); 2149163953Srrs SCTP_INP_WLOCK((*stcb)->sctp_ep); 2150163953Srrs SCTP_TCB_LOCK((*stcb)); 2151163953Srrs SCTP_INP_WUNLOCK((*stcb)->sctp_ep); 2152163953Srrs if (so == NULL) { 2153163953Srrs struct mbuf *op_err; 2154163953Srrs 2155163953Srrs /* Too many sockets */ 2156163953Srrs#ifdef SCTP_DEBUG 2157163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 2158163953Srrs printf("process_cookie_new: no room for another socket!\n"); 2159163953Srrs } 2160163953Srrs#endif /* SCTP_DEBUG */ 2161163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 2162163953Srrs sctp_abort_association(*inp_p, NULL, m, iphlen, 2163163953Srrs sh, op_err); 2164165220Srrs sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_20); 2165163953Srrs return (NULL); 2166163953Srrs } 2167163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 2168166086Srrs SCTP_INP_INCR_REF(inp); 2169166086Srrs /* 2170166086Srrs * We add the unbound flag here so that if we get an 2171166086Srrs * soabort() before we get the move_pcb done, we 2172166086Srrs * will properly cleanup. 2173166086Srrs */ 2174163953Srrs inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2175163953Srrs SCTP_PCB_FLAGS_CONNECTED | 2176163953Srrs SCTP_PCB_FLAGS_IN_TCPPOOL | 2177166086Srrs SCTP_PCB_FLAGS_UNBOUND | 2178163953Srrs (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) | 2179163953Srrs SCTP_PCB_FLAGS_DONT_WAKE); 2180163953Srrs inp->sctp_features = (*inp_p)->sctp_features; 2181163953Srrs inp->sctp_socket = so; 2182163953Srrs inp->sctp_frag_point = (*inp_p)->sctp_frag_point; 2183163953Srrs inp->partial_delivery_point = (*inp_p)->partial_delivery_point; 2184163953Srrs inp->sctp_context = (*inp_p)->sctp_context; 2185163953Srrs inp->inp_starting_point_for_iterator = NULL; 2186163953Srrs /* 2187163953Srrs * copy in the authentication parameters from the 2188163953Srrs * original endpoint 2189163953Srrs */ 2190163953Srrs if (inp->sctp_ep.local_hmacs) 2191163953Srrs sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2192163953Srrs inp->sctp_ep.local_hmacs = 2193163953Srrs sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs); 2194163953Srrs if (inp->sctp_ep.local_auth_chunks) 2195163953Srrs sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2196163953Srrs inp->sctp_ep.local_auth_chunks = 2197163953Srrs sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks); 2198163953Srrs (void)sctp_copy_skeylist(&(*inp_p)->sctp_ep.shared_keys, 2199163953Srrs &inp->sctp_ep.shared_keys); 2200163953Srrs 2201163953Srrs /* 2202163953Srrs * Now we must move it from one hash table to 2203163953Srrs * another and get the tcb in the right place. 2204163953Srrs */ 2205163953Srrs sctp_move_pcb_and_assoc(*inp_p, inp, *stcb); 2206163953Srrs sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb); 2207163953Srrs 2208166086Srrs /* 2209166086Srrs * now we must check to see if we were aborted while 2210166086Srrs * the move was going on and the lock/unlock 2211166086Srrs * happened. 2212166086Srrs */ 2213166086Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 2214166086Srrs /* 2215166086Srrs * yep it was, we leave the assoc attached 2216166086Srrs * to the socket since the sctp_inpcb_free() 2217166086Srrs * call will send an abort for us. 2218166086Srrs */ 2219166086Srrs SCTP_INP_DECR_REF(inp); 2220166086Srrs return (NULL); 2221166086Srrs } 2222166086Srrs SCTP_INP_DECR_REF(inp); 2223163953Srrs /* Switch over to the new guy */ 2224163953Srrs *inp_p = inp; 2225166086Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2226163953Srrs 2227166086Srrs /* 2228166086Srrs * Pull it from the incomplete queue and wake the 2229166086Srrs * guy 2230166086Srrs */ 2231166086Srrs soisconnected(so); 2232163953Srrs return (m); 2233163953Srrs } 2234163953Srrs } 2235163953Srrs if ((notification) && ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) { 2236163953Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2237163953Srrs } 2238163953Srrs return (m); 2239163953Srrs} 2240163953Srrs 2241163953Srrsstatic void 2242163953Srrssctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp, 2243163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2244163953Srrs{ 2245163953Srrs /* cp must not be used, others call this without a c-ack :-) */ 2246163953Srrs struct sctp_association *asoc; 2247163953Srrs 2248163953Srrs#ifdef SCTP_DEBUG 2249163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2250163953Srrs printf("sctp_handle_cookie_ack: handling COOKIE-ACK\n"); 2251163953Srrs } 2252163953Srrs#endif 2253163953Srrs if (stcb == NULL) 2254163953Srrs return; 2255163953Srrs 2256163953Srrs asoc = &stcb->asoc; 2257163953Srrs 2258163953Srrs sctp_stop_all_cookie_timers(stcb); 2259163953Srrs /* process according to association state */ 2260163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 2261163953Srrs /* state change only needed when I am in right state */ 2262163953Srrs#ifdef SCTP_DEBUG 2263163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2264163953Srrs printf("moving to OPEN state\n"); 2265163953Srrs } 2266163953Srrs#endif 2267163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 2268163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 2269163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 2270163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 2271163953Srrs 2272163953Srrs } else { 2273163953Srrs asoc->state = SCTP_STATE_OPEN; 2274163953Srrs } 2275163953Srrs /* update RTO */ 2276163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 2277163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 2278163953Srrs if (asoc->overall_error_count == 0) { 2279163953Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, 2280163953Srrs &asoc->time_entered); 2281163953Srrs } 2282163953Srrs SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 2283163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL); 2284163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 2285163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 2286163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 2287163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 2288163953Srrs } 2289163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 2290163953Srrs stcb, net); 2291163953Srrs /* 2292163953Srrs * since we did not send a HB make sure we don't double 2293163953Srrs * things 2294163953Srrs */ 2295163953Srrs net->hb_responded = 1; 2296163953Srrs 2297163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 2298163953Srrs sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) { 2299163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 2300163953Srrs stcb->sctp_ep, stcb, NULL); 2301163953Srrs } 2302163953Srrs /* 2303163953Srrs * set ASCONF timer if ASCONFs are pending and allowed (eg. 2304163953Srrs * addresses changed when init/cookie echo in flight) 2305163953Srrs */ 2306163953Srrs if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) && 2307163953Srrs (stcb->asoc.peer_supports_asconf) && 2308163953Srrs (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) { 2309163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2310163953Srrs stcb->sctp_ep, stcb, 2311163953Srrs stcb->asoc.primary_destination); 2312163953Srrs } 2313163953Srrs } 2314163953Srrs /* Toss the cookie if I can */ 2315163953Srrs sctp_toss_old_cookies(stcb, asoc); 2316163953Srrs if (!TAILQ_EMPTY(&asoc->sent_queue)) { 2317163953Srrs /* Restart the timer if we have pending data */ 2318163953Srrs struct sctp_tmit_chunk *chk; 2319163953Srrs 2320163953Srrs chk = TAILQ_FIRST(&asoc->sent_queue); 2321163953Srrs if (chk) { 2322163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2323163953Srrs stcb, chk->whoTo); 2324163953Srrs } 2325163953Srrs } 2326163953Srrs} 2327163953Srrs 2328163953Srrsstatic void 2329163953Srrssctp_handle_ecn_echo(struct sctp_ecne_chunk *cp, 2330163953Srrs struct sctp_tcb *stcb) 2331163953Srrs{ 2332163953Srrs struct sctp_nets *net; 2333163953Srrs struct sctp_tmit_chunk *lchk; 2334163953Srrs uint32_t tsn; 2335163953Srrs 2336163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_ecne_chunk)) { 2337163953Srrs return; 2338163953Srrs } 2339163953Srrs SCTP_STAT_INCR(sctps_recvecne); 2340163953Srrs tsn = ntohl(cp->tsn); 2341163953Srrs /* ECN Nonce stuff: need a resync and disable the nonce sum check */ 2342163953Srrs /* Also we make sure we disable the nonce_wait */ 2343163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.send_queue); 2344163953Srrs if (lchk == NULL) { 2345163953Srrs stcb->asoc.nonce_resync_tsn = stcb->asoc.sending_seq; 2346163953Srrs } else { 2347163953Srrs stcb->asoc.nonce_resync_tsn = lchk->rec.data.TSN_seq; 2348163953Srrs } 2349163953Srrs stcb->asoc.nonce_wait_for_ecne = 0; 2350163953Srrs stcb->asoc.nonce_sum_check = 0; 2351163953Srrs 2352163953Srrs /* Find where it was sent, if possible */ 2353163953Srrs net = NULL; 2354163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.sent_queue); 2355163953Srrs while (lchk) { 2356163953Srrs if (lchk->rec.data.TSN_seq == tsn) { 2357163953Srrs net = lchk->whoTo; 2358163953Srrs break; 2359163953Srrs } 2360163953Srrs if (compare_with_wrap(lchk->rec.data.TSN_seq, tsn, MAX_SEQ)) 2361163953Srrs break; 2362163953Srrs lchk = TAILQ_NEXT(lchk, sctp_next); 2363163953Srrs } 2364163953Srrs if (net == NULL) 2365163953Srrs /* default is we use the primary */ 2366163953Srrs net = stcb->asoc.primary_destination; 2367163953Srrs 2368163953Srrs if (compare_with_wrap(tsn, stcb->asoc.last_cwr_tsn, MAX_TSN)) { 2369163953Srrs#ifdef SCTP_CWND_MONITOR 2370163953Srrs int old_cwnd; 2371163953Srrs 2372163953Srrs old_cwnd = net->cwnd; 2373163953Srrs#endif 2374163953Srrs SCTP_STAT_INCR(sctps_ecnereducedcwnd); 2375163953Srrs net->ssthresh = net->cwnd / 2; 2376163953Srrs if (net->ssthresh < net->mtu) { 2377163953Srrs net->ssthresh = net->mtu; 2378163953Srrs /* here back off the timer as well, to slow us down */ 2379163953Srrs net->RTO <<= 2; 2380163953Srrs } 2381163953Srrs net->cwnd = net->ssthresh; 2382163953Srrs#ifdef SCTP_CWND_MONITOR 2383163953Srrs sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_SAT); 2384163953Srrs#endif 2385163953Srrs /* 2386163953Srrs * we reduce once every RTT. So we will only lower cwnd at 2387163953Srrs * the next sending seq i.e. the resync_tsn. 2388163953Srrs */ 2389163953Srrs stcb->asoc.last_cwr_tsn = stcb->asoc.nonce_resync_tsn; 2390163953Srrs } 2391163953Srrs /* 2392163953Srrs * We always send a CWR this way if our previous one was lost our 2393163953Srrs * peer will get an update, or if it is not time again to reduce we 2394163953Srrs * still get the cwr to the peer. 2395163953Srrs */ 2396163953Srrs sctp_send_cwr(stcb, net, tsn); 2397163953Srrs} 2398163953Srrs 2399163953Srrsstatic void 2400163953Srrssctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb) 2401163953Srrs{ 2402163953Srrs /* 2403163953Srrs * Here we get a CWR from the peer. We must look in the outqueue and 2404163953Srrs * make sure that we have a covered ECNE in teh control chunk part. 2405163953Srrs * If so remove it. 2406163953Srrs */ 2407163953Srrs struct sctp_tmit_chunk *chk; 2408163953Srrs struct sctp_ecne_chunk *ecne; 2409163953Srrs 2410163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 2411163953Srrs if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) { 2412163953Srrs continue; 2413163953Srrs } 2414163953Srrs /* 2415163953Srrs * Look for and remove if it is the right TSN. Since there 2416163953Srrs * is only ONE ECNE on the control queue at any one time we 2417163953Srrs * don't need to worry about more than one! 2418163953Srrs */ 2419163953Srrs ecne = mtod(chk->data, struct sctp_ecne_chunk *); 2420163953Srrs if (compare_with_wrap(ntohl(cp->tsn), ntohl(ecne->tsn), 2421163953Srrs MAX_TSN) || (cp->tsn == ecne->tsn)) { 2422163953Srrs /* this covers this ECNE, we can remove it */ 2423163953Srrs stcb->asoc.ecn_echo_cnt_onq--; 2424163953Srrs TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, 2425163953Srrs sctp_next); 2426163953Srrs if (chk->data) { 2427163953Srrs sctp_m_freem(chk->data); 2428163953Srrs chk->data = NULL; 2429163953Srrs } 2430163953Srrs stcb->asoc.ctrl_queue_cnt--; 2431163953Srrs sctp_free_remote_addr(chk->whoTo); 2432163953Srrs sctp_free_a_chunk(stcb, chk); 2433163953Srrs break; 2434163953Srrs } 2435163953Srrs } 2436163953Srrs} 2437163953Srrs 2438163953Srrsstatic void 2439163953Srrssctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp, 2440163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2441163953Srrs{ 2442163953Srrs struct sctp_association *asoc; 2443163953Srrs 2444163953Srrs#ifdef SCTP_DEBUG 2445163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2446163953Srrs printf("sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n"); 2447163953Srrs } 2448163953Srrs#endif 2449163953Srrs if (stcb == NULL) 2450163953Srrs return; 2451163953Srrs 2452163953Srrs asoc = &stcb->asoc; 2453163953Srrs /* process according to association state */ 2454163953Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) { 2455163953Srrs /* unexpected SHUTDOWN-COMPLETE... so ignore... */ 2456163953Srrs SCTP_TCB_UNLOCK(stcb); 2457163953Srrs return; 2458163953Srrs } 2459163953Srrs /* notify upper layer protocol */ 2460163953Srrs if (stcb->sctp_socket) { 2461163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 2462163953Srrs /* are the queues empty? they should be */ 2463163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 2464163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 2465163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 2466164205Srrs sctp_report_all_outbound(stcb, 0); 2467163953Srrs } 2468163953Srrs } 2469163953Srrs /* stop the timer */ 2470165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_21); 2471163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 2472163953Srrs /* free the TCB */ 2473165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_22); 2474163953Srrs return; 2475163953Srrs} 2476163953Srrs 2477163953Srrsstatic int 2478163953Srrsprocess_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc, 2479163953Srrs struct sctp_nets *net, uint8_t flg) 2480163953Srrs{ 2481163953Srrs switch (desc->chunk_type) { 2482163953Srrs case SCTP_DATA: 2483163953Srrs /* find the tsn to resend (possibly */ 2484163953Srrs { 2485163953Srrs uint32_t tsn; 2486163953Srrs struct sctp_tmit_chunk *tp1; 2487163953Srrs 2488163953Srrs tsn = ntohl(desc->tsn_ifany); 2489163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2490163953Srrs while (tp1) { 2491163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2492163953Srrs /* found it */ 2493163953Srrs break; 2494163953Srrs } 2495163953Srrs if (compare_with_wrap(tp1->rec.data.TSN_seq, tsn, 2496163953Srrs MAX_TSN)) { 2497163953Srrs /* not found */ 2498163953Srrs tp1 = NULL; 2499163953Srrs break; 2500163953Srrs } 2501163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2502163953Srrs } 2503163953Srrs if (tp1 == NULL) { 2504163953Srrs /* 2505163953Srrs * Do it the other way , aka without paying 2506163953Srrs * attention to queue seq order. 2507163953Srrs */ 2508163953Srrs SCTP_STAT_INCR(sctps_pdrpdnfnd); 2509163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2510163953Srrs while (tp1) { 2511163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2512163953Srrs /* found it */ 2513163953Srrs break; 2514163953Srrs } 2515163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2516163953Srrs } 2517163953Srrs } 2518163953Srrs if (tp1 == NULL) { 2519163953Srrs SCTP_STAT_INCR(sctps_pdrptsnnf); 2520163953Srrs } 2521163953Srrs if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) { 2522163953Srrs uint8_t *ddp; 2523163953Srrs 2524163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 2525163953Srrs ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) { 2526163953Srrs SCTP_STAT_INCR(sctps_pdrpdiwnp); 2527163953Srrs return (0); 2528163953Srrs } 2529163953Srrs if (stcb->asoc.peers_rwnd == 0 && 2530163953Srrs (flg & SCTP_FROM_MIDDLE_BOX)) { 2531163953Srrs SCTP_STAT_INCR(sctps_pdrpdizrw); 2532163953Srrs return (0); 2533163953Srrs } 2534163953Srrs ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+ 2535163953Srrs sizeof(struct sctp_data_chunk)); 2536163953Srrs { 2537163953Srrs unsigned int iii; 2538163953Srrs 2539163953Srrs for (iii = 0; iii < sizeof(desc->data_bytes); 2540163953Srrs iii++) { 2541163953Srrs if (ddp[iii] != desc->data_bytes[iii]) { 2542163953Srrs SCTP_STAT_INCR(sctps_pdrpbadd); 2543163953Srrs return (-1); 2544163953Srrs } 2545163953Srrs } 2546163953Srrs } 2547163953Srrs /* 2548163953Srrs * We zero out the nonce so resync not 2549163953Srrs * needed 2550163953Srrs */ 2551163953Srrs tp1->rec.data.ect_nonce = 0; 2552163953Srrs 2553163953Srrs if (tp1->do_rtt) { 2554163953Srrs /* 2555163953Srrs * this guy had a RTO calculation 2556163953Srrs * pending on it, cancel it 2557163953Srrs */ 2558163953Srrs tp1->whoTo->rto_pending = 0; 2559163953Srrs tp1->do_rtt = 0; 2560163953Srrs } 2561163953Srrs SCTP_STAT_INCR(sctps_pdrpmark); 2562163953Srrs if (tp1->sent != SCTP_DATAGRAM_RESEND) 2563163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2564163953Srrs tp1->sent = SCTP_DATAGRAM_RESEND; 2565163953Srrs /* 2566163953Srrs * mark it as if we were doing a FR, since 2567163953Srrs * we will be getting gap ack reports behind 2568163953Srrs * the info from the router. 2569163953Srrs */ 2570163953Srrs tp1->rec.data.doing_fast_retransmit = 1; 2571163953Srrs /* 2572163953Srrs * mark the tsn with what sequences can 2573163953Srrs * cause a new FR. 2574163953Srrs */ 2575163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 2576163953Srrs tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 2577163953Srrs } else { 2578163953Srrs tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 2579163953Srrs } 2580163953Srrs 2581163953Srrs /* restart the timer */ 2582163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2583165220Srrs stcb, tp1->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_23); 2584163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2585163953Srrs stcb, tp1->whoTo); 2586163953Srrs 2587163953Srrs /* fix counts and things */ 2588165220Srrs#ifdef SCTP_FLIGHT_LOGGING 2589165220Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN, 2590165220Srrs tp1->whoTo->flight_size, 2591165220Srrs tp1->book_size, 2592165220Srrs (uintptr_t) stcb, 2593165220Srrs tp1->rec.data.TSN_seq); 2594165220Srrs#endif 2595163953Srrs if (tp1->whoTo->flight_size >= tp1->book_size) 2596163953Srrs tp1->whoTo->flight_size -= tp1->book_size; 2597163953Srrs else 2598163953Srrs tp1->whoTo->flight_size = 0; 2599163953Srrs 2600163953Srrs if (stcb->asoc.total_flight >= tp1->book_size) { 2601163953Srrs stcb->asoc.total_flight -= tp1->book_size; 2602163953Srrs if (stcb->asoc.total_flight_count > 0) 2603163953Srrs stcb->asoc.total_flight_count--; 2604163953Srrs } else { 2605163953Srrs stcb->asoc.total_flight = 0; 2606163953Srrs stcb->asoc.total_flight_count = 0; 2607163953Srrs } 2608163953Srrs tp1->snd_count--; 2609163953Srrs } { 2610163953Srrs /* audit code */ 2611163953Srrs unsigned int audit; 2612163953Srrs 2613163953Srrs audit = 0; 2614163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) { 2615163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2616163953Srrs audit++; 2617163953Srrs } 2618163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue, 2619163953Srrs sctp_next) { 2620163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2621163953Srrs audit++; 2622163953Srrs } 2623163953Srrs if (audit != stcb->asoc.sent_queue_retran_cnt) { 2624163953Srrs printf("**Local Audit finds cnt:%d asoc cnt:%d\n", 2625163953Srrs audit, stcb->asoc.sent_queue_retran_cnt); 2626163953Srrs#ifndef SCTP_AUDITING_ENABLED 2627163953Srrs stcb->asoc.sent_queue_retran_cnt = audit; 2628163953Srrs#endif 2629163953Srrs } 2630163953Srrs } 2631163953Srrs } 2632163953Srrs break; 2633163953Srrs case SCTP_ASCONF: 2634163953Srrs { 2635163953Srrs struct sctp_tmit_chunk *asconf; 2636163953Srrs 2637163953Srrs TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue, 2638163953Srrs sctp_next) { 2639163953Srrs if (asconf->rec.chunk_id.id == SCTP_ASCONF) { 2640163953Srrs break; 2641163953Srrs } 2642163953Srrs } 2643163953Srrs if (asconf) { 2644163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 2645163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2646163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 2647163953Srrs asconf->snd_count--; 2648163953Srrs } 2649163953Srrs } 2650163953Srrs break; 2651163953Srrs case SCTP_INITIATION: 2652163953Srrs /* resend the INIT */ 2653163953Srrs stcb->asoc.dropped_special_cnt++; 2654163953Srrs if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) { 2655163953Srrs /* 2656163953Srrs * If we can get it in, in a few attempts we do 2657163953Srrs * this, otherwise we let the timer fire. 2658163953Srrs */ 2659163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, 2660165220Srrs stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_24); 2661163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 2662163953Srrs } 2663163953Srrs break; 2664163953Srrs case SCTP_SELECTIVE_ACK: 2665163953Srrs /* resend the sack */ 2666163953Srrs sctp_send_sack(stcb); 2667163953Srrs break; 2668163953Srrs case SCTP_HEARTBEAT_REQUEST: 2669163953Srrs /* resend a demand HB */ 2670163953Srrs sctp_send_hb(stcb, 1, net); 2671163953Srrs break; 2672163953Srrs case SCTP_SHUTDOWN: 2673163953Srrs sctp_send_shutdown(stcb, net); 2674163953Srrs break; 2675163953Srrs case SCTP_SHUTDOWN_ACK: 2676163953Srrs sctp_send_shutdown_ack(stcb, net); 2677163953Srrs break; 2678163953Srrs case SCTP_COOKIE_ECHO: 2679163953Srrs { 2680163953Srrs struct sctp_tmit_chunk *cookie; 2681163953Srrs 2682163953Srrs cookie = NULL; 2683163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, 2684163953Srrs sctp_next) { 2685163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 2686163953Srrs break; 2687163953Srrs } 2688163953Srrs } 2689163953Srrs if (cookie) { 2690163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) 2691163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2692163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 2693163953Srrs sctp_stop_all_cookie_timers(stcb); 2694163953Srrs } 2695163953Srrs } 2696163953Srrs break; 2697163953Srrs case SCTP_COOKIE_ACK: 2698163953Srrs sctp_send_cookie_ack(stcb); 2699163953Srrs break; 2700163953Srrs case SCTP_ASCONF_ACK: 2701163953Srrs /* resend last asconf ack */ 2702163953Srrs sctp_send_asconf_ack(stcb, 1); 2703163953Srrs break; 2704163953Srrs case SCTP_FORWARD_CUM_TSN: 2705163953Srrs send_forward_tsn(stcb, &stcb->asoc); 2706163953Srrs break; 2707163953Srrs /* can't do anything with these */ 2708163953Srrs case SCTP_PACKET_DROPPED: 2709163953Srrs case SCTP_INITIATION_ACK: /* this should not happen */ 2710163953Srrs case SCTP_HEARTBEAT_ACK: 2711163953Srrs case SCTP_ABORT_ASSOCIATION: 2712163953Srrs case SCTP_OPERATION_ERROR: 2713163953Srrs case SCTP_SHUTDOWN_COMPLETE: 2714163953Srrs case SCTP_ECN_ECHO: 2715163953Srrs case SCTP_ECN_CWR: 2716163953Srrs default: 2717163953Srrs break; 2718163953Srrs } 2719163953Srrs return (0); 2720163953Srrs} 2721163953Srrs 2722163953Srrsvoid 2723163953Srrssctp_reset_in_stream(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2724163953Srrs{ 2725163953Srrs int i; 2726163953Srrs uint16_t temp; 2727163953Srrs 2728163953Srrs /* 2729163953Srrs * We set things to 0xffff since this is the last delivered sequence 2730163953Srrs * and we will be sending in 0 after the reset. 2731163953Srrs */ 2732163953Srrs 2733163953Srrs if (number_entries) { 2734163953Srrs for (i = 0; i < number_entries; i++) { 2735163953Srrs temp = ntohs(list[i]); 2736163953Srrs if (temp >= stcb->asoc.streamincnt) { 2737163953Srrs continue; 2738163953Srrs } 2739163953Srrs stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff; 2740163953Srrs } 2741163953Srrs } else { 2742163953Srrs list = NULL; 2743163953Srrs for (i = 0; i < stcb->asoc.streamincnt; i++) { 2744163953Srrs stcb->asoc.strmin[i].last_sequence_delivered = 0xffff; 2745163953Srrs } 2746163953Srrs } 2747163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list); 2748163953Srrs} 2749163953Srrs 2750163953Srrsstatic void 2751163953Srrssctp_reset_out_streams(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2752163953Srrs{ 2753163953Srrs int i; 2754163953Srrs 2755163953Srrs if (number_entries == 0) { 2756163953Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 2757163953Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 2758163953Srrs } 2759163953Srrs } else if (number_entries) { 2760163953Srrs for (i = 0; i < number_entries; i++) { 2761163953Srrs uint16_t temp; 2762163953Srrs 2763163953Srrs temp = ntohs(list[i]); 2764163953Srrs if (temp >= stcb->asoc.streamoutcnt) { 2765163953Srrs /* no such stream */ 2766163953Srrs continue; 2767163953Srrs } 2768163953Srrs stcb->asoc.strmout[temp].next_sequence_sent = 0; 2769163953Srrs } 2770163953Srrs } 2771163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list); 2772163953Srrs} 2773163953Srrs 2774163953Srrs 2775163953Srrsstruct sctp_stream_reset_out_request * 2776163953Srrssctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk) 2777163953Srrs{ 2778163953Srrs struct sctp_association *asoc; 2779163953Srrs struct sctp_stream_reset_out_req *req; 2780163953Srrs struct sctp_stream_reset_out_request *r; 2781163953Srrs struct sctp_tmit_chunk *chk; 2782163953Srrs int len, clen; 2783163953Srrs 2784163953Srrs asoc = &stcb->asoc; 2785163953Srrs if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 2786163953Srrs return (NULL); 2787163953Srrs } 2788163953Srrs if (stcb->asoc.str_reset == NULL) { 2789163953Srrs return (NULL); 2790163953Srrs } 2791163953Srrs chk = stcb->asoc.str_reset; 2792163953Srrs if (chk->data == NULL) { 2793163953Srrs return (NULL); 2794163953Srrs } 2795163953Srrs if (bchk) { 2796163953Srrs /* he wants a copy of the chk pointer */ 2797163953Srrs *bchk = chk; 2798163953Srrs } 2799163953Srrs clen = chk->send_size; 2800163953Srrs req = mtod(chk->data, struct sctp_stream_reset_out_req *); 2801163953Srrs r = &req->sr_req; 2802163953Srrs if (ntohl(r->request_seq) == seq) { 2803163953Srrs /* found it */ 2804163953Srrs return (r); 2805163953Srrs } 2806163953Srrs len = SCTP_SIZE32(ntohs(r->ph.param_length)); 2807163953Srrs if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) { 2808163953Srrs /* move to the next one, there can only be a max of two */ 2809163953Srrs r = (struct sctp_stream_reset_out_request *)((caddr_t)r + len); 2810163953Srrs if (ntohl(r->request_seq) == seq) { 2811163953Srrs return (r); 2812163953Srrs } 2813163953Srrs } 2814163953Srrs /* that seq is not here */ 2815163953Srrs return (NULL); 2816163953Srrs} 2817163953Srrs 2818163953Srrsstatic void 2819163953Srrssctp_clean_up_stream_reset(struct sctp_tcb *stcb) 2820163953Srrs{ 2821163953Srrs struct sctp_association *asoc; 2822163953Srrs struct sctp_tmit_chunk *chk = stcb->asoc.str_reset; 2823163953Srrs 2824163953Srrs if (stcb->asoc.str_reset == NULL) { 2825163953Srrs return; 2826163953Srrs } 2827166675Srrs asoc = &stcb->asoc; 2828166675Srrs 2829165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_25); 2830163953Srrs TAILQ_REMOVE(&asoc->control_send_queue, 2831163953Srrs chk, 2832163953Srrs sctp_next); 2833163953Srrs if (chk->data) { 2834163953Srrs sctp_m_freem(chk->data); 2835163953Srrs chk->data = NULL; 2836163953Srrs } 2837163953Srrs asoc->ctrl_queue_cnt--; 2838163953Srrs sctp_free_remote_addr(chk->whoTo); 2839163953Srrs 2840163953Srrs sctp_free_a_chunk(stcb, chk); 2841163953Srrs stcb->asoc.str_reset = NULL; 2842163953Srrs} 2843163953Srrs 2844163953Srrs 2845163953Srrsstatic int 2846163953Srrssctp_handle_stream_reset_response(struct sctp_tcb *stcb, 2847163953Srrs uint32_t seq, uint32_t action, 2848164139Srrs struct sctp_stream_reset_response *respin) 2849163953Srrs{ 2850163953Srrs uint16_t type; 2851163953Srrs int lparm_len; 2852163953Srrs struct sctp_association *asoc = &stcb->asoc; 2853163953Srrs struct sctp_tmit_chunk *chk; 2854163953Srrs struct sctp_stream_reset_out_request *srparam; 2855163953Srrs int number_entries; 2856163953Srrs 2857163953Srrs if (asoc->stream_reset_outstanding == 0) { 2858163953Srrs /* duplicate */ 2859163953Srrs return (0); 2860163953Srrs } 2861163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 2862163953Srrs srparam = sctp_find_stream_reset(stcb, seq, &chk); 2863163953Srrs if (srparam) { 2864163953Srrs stcb->asoc.str_reset_seq_out++; 2865163953Srrs type = ntohs(srparam->ph.param_type); 2866163953Srrs lparm_len = ntohs(srparam->ph.param_length); 2867163953Srrs if (type == SCTP_STR_RESET_OUT_REQUEST) { 2868164139Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t); 2869163953Srrs asoc->stream_reset_out_is_outstanding = 0; 2870163953Srrs if (asoc->stream_reset_outstanding) 2871163953Srrs asoc->stream_reset_outstanding--; 2872163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2873163953Srrs /* do it */ 2874163953Srrs sctp_reset_out_streams(stcb, number_entries, srparam->list_of_streams); 2875163953Srrs } else { 2876163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, srparam->list_of_streams); 2877163953Srrs } 2878163953Srrs } else if (type == SCTP_STR_RESET_IN_REQUEST) { 2879163953Srrs /* Answered my request */ 2880164139Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t); 2881163953Srrs if (asoc->stream_reset_outstanding) 2882163953Srrs asoc->stream_reset_outstanding--; 2883163953Srrs if (action != SCTP_STREAM_RESET_PERFORMED) { 2884163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb, number_entries, srparam->list_of_streams); 2885163953Srrs } 2886163953Srrs } else if (type == SCTP_STR_RESET_TSN_REQUEST) { 2887163953Srrs /** 2888163953Srrs * a) Adopt the new in tsn. 2889163953Srrs * b) reset the map 2890163953Srrs * c) Adopt the new out-tsn 2891163953Srrs */ 2892163953Srrs struct sctp_stream_reset_response_tsn *resp; 2893163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2894163953Srrs int abort_flag = 0; 2895163953Srrs 2896163953Srrs if (respin == NULL) { 2897163953Srrs /* huh ? */ 2898163953Srrs return (0); 2899163953Srrs } 2900163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2901163953Srrs resp = (struct sctp_stream_reset_response_tsn *)respin; 2902163953Srrs asoc->stream_reset_outstanding--; 2903163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 2904163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 2905163953Srrs fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1); 2906163953Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag); 2907163953Srrs if (abort_flag) { 2908163953Srrs return (1); 2909163953Srrs } 2910163953Srrs stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1); 2911163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 2912163953Srrs stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn); 2913163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 2914163953Srrs stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn); 2915163953Srrs stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn; 2916163953Srrs 2917163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 2918163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 2919163953Srrs 2920163953Srrs } 2921163953Srrs } 2922163953Srrs /* get rid of the request and get the request flags */ 2923163953Srrs if (asoc->stream_reset_outstanding == 0) { 2924163953Srrs sctp_clean_up_stream_reset(stcb); 2925163953Srrs } 2926163953Srrs } 2927163953Srrs } 2928163953Srrs return (0); 2929163953Srrs} 2930163953Srrs 2931163953Srrsstatic void 2932163953Srrssctp_handle_str_reset_request_in(struct sctp_tcb *stcb, 2933163953Srrs struct sctp_tmit_chunk *chk, 2934163953Srrs struct sctp_stream_reset_in_request *req) 2935163953Srrs{ 2936163953Srrs uint32_t seq; 2937163953Srrs int len, i; 2938163953Srrs int number_entries; 2939163953Srrs uint16_t temp; 2940163953Srrs 2941163953Srrs /* 2942163953Srrs * peer wants me to send a str-reset to him for my outgoing seq's if 2943163953Srrs * seq_in is right. 2944163953Srrs */ 2945163953Srrs struct sctp_association *asoc = &stcb->asoc; 2946163953Srrs 2947163953Srrs seq = ntohl(req->request_seq); 2948163953Srrs if (asoc->str_reset_seq_in == seq) { 2949163953Srrs if (stcb->asoc.stream_reset_out_is_outstanding == 0) { 2950163953Srrs len = ntohs(req->ph.param_length); 2951163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t)); 2952163953Srrs for (i = 0; i < number_entries; i++) { 2953163953Srrs temp = ntohs(req->list_of_streams[i]); 2954163953Srrs req->list_of_streams[i] = temp; 2955163953Srrs } 2956163953Srrs /* move the reset action back one */ 2957163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2958163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2959163953Srrs sctp_add_stream_reset_out(chk, number_entries, req->list_of_streams, 2960163953Srrs asoc->str_reset_seq_out, 2961163953Srrs seq, (asoc->sending_seq - 1)); 2962163953Srrs asoc->stream_reset_out_is_outstanding = 1; 2963163953Srrs asoc->str_reset = chk; 2964163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 2965163953Srrs stcb->asoc.stream_reset_outstanding++; 2966163953Srrs } else { 2967163953Srrs /* Can't do it, since we have sent one out */ 2968163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2969163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_TRY_LATER; 2970163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2971163953Srrs } 2972163953Srrs asoc->str_reset_seq_in++; 2973163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 2974163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2975163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 2976163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 2977163953Srrs } else { 2978163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2979163953Srrs } 2980163953Srrs} 2981163953Srrs 2982163953Srrsstatic int 2983163953Srrssctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb, 2984163953Srrs struct sctp_tmit_chunk *chk, 2985163953Srrs struct sctp_stream_reset_tsn_request *req) 2986163953Srrs{ 2987163953Srrs /* reset all in and out and update the tsn */ 2988163953Srrs /* 2989163953Srrs * A) reset my str-seq's on in and out. B) Select a receive next, 2990163953Srrs * and set cum-ack to it. Also process this selected number as a 2991163953Srrs * fwd-tsn as well. C) set in the response my next sending seq. 2992163953Srrs */ 2993163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2994163953Srrs struct sctp_association *asoc = &stcb->asoc; 2995163953Srrs int abort_flag = 0; 2996163953Srrs uint32_t seq; 2997163953Srrs 2998163953Srrs seq = ntohl(req->request_seq); 2999163953Srrs if (asoc->str_reset_seq_in == seq) { 3000163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 3001163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 3002163953Srrs fwdtsn.ch.chunk_flags = 0; 3003163953Srrs fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1); 3004163953Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag); 3005163953Srrs if (abort_flag) { 3006163953Srrs return (1); 3007163953Srrs } 3008163953Srrs stcb->asoc.highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA; 3009163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 3010163953Srrs stcb->asoc.mapping_array_base_tsn = stcb->asoc.highest_tsn_inside_map + 1; 3011163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 3012163953Srrs atomic_add_int(&stcb->asoc.sending_seq, 1); 3013163953Srrs /* save off historical data for retrans */ 3014163953Srrs stcb->asoc.last_sending_seq[1] = stcb->asoc.last_sending_seq[0]; 3015163953Srrs stcb->asoc.last_sending_seq[0] = stcb->asoc.sending_seq; 3016163953Srrs stcb->asoc.last_base_tsnsent[1] = stcb->asoc.last_base_tsnsent[0]; 3017163953Srrs stcb->asoc.last_base_tsnsent[0] = stcb->asoc.mapping_array_base_tsn; 3018163953Srrs 3019163953Srrs sctp_add_stream_reset_result_tsn(chk, 3020163953Srrs ntohl(req->request_seq), 3021163953Srrs SCTP_STREAM_RESET_PERFORMED, 3022163953Srrs stcb->asoc.sending_seq, 3023163953Srrs stcb->asoc.mapping_array_base_tsn); 3024163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 3025163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 3026163953Srrs stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0]; 3027163953Srrs stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3028163953Srrs 3029163953Srrs asoc->str_reset_seq_in++; 3030163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 3031163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0], 3032163953Srrs stcb->asoc.last_sending_seq[0], 3033163953Srrs stcb->asoc.last_base_tsnsent[0] 3034163953Srrs ); 3035163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 3036163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1], 3037163953Srrs stcb->asoc.last_sending_seq[1], 3038163953Srrs stcb->asoc.last_base_tsnsent[1] 3039163953Srrs ); 3040163953Srrs } else { 3041163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 3042163953Srrs } 3043163953Srrs return (0); 3044163953Srrs} 3045163953Srrs 3046163953Srrsstatic void 3047163953Srrssctp_handle_str_reset_request_out(struct sctp_tcb *stcb, 3048163953Srrs struct sctp_tmit_chunk *chk, 3049163953Srrs struct sctp_stream_reset_out_request *req) 3050163953Srrs{ 3051163953Srrs uint32_t seq, tsn; 3052163953Srrs int number_entries, len; 3053163953Srrs struct sctp_association *asoc = &stcb->asoc; 3054163953Srrs 3055163953Srrs seq = ntohl(req->request_seq); 3056163953Srrs 3057163953Srrs /* now if its not a duplicate we process it */ 3058163953Srrs if (asoc->str_reset_seq_in == seq) { 3059163953Srrs len = ntohs(req->ph.param_length); 3060163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t)); 3061163953Srrs /* 3062163953Srrs * the sender is resetting, handle the list issue.. we must 3063163953Srrs * a) verify if we can do the reset, if so no problem b) If 3064163953Srrs * we can't do the reset we must copy the request. c) queue 3065163953Srrs * it, and setup the data in processor to trigger it off 3066163953Srrs * when needed and dequeue all the queued data. 3067163953Srrs */ 3068163953Srrs tsn = ntohl(req->send_reset_at_tsn); 3069163953Srrs 3070163953Srrs /* move the reset action back one */ 3071163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 3072163953Srrs if ((tsn == asoc->cumulative_tsn) || 3073163953Srrs (compare_with_wrap(asoc->cumulative_tsn, tsn, MAX_TSN))) { 3074163953Srrs /* we can do it now */ 3075163953Srrs sctp_reset_in_stream(stcb, number_entries, req->list_of_streams); 3076163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 3077163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3078163953Srrs } else { 3079163953Srrs /* 3080163953Srrs * we must queue it up and thus wait for the TSN's 3081163953Srrs * to arrive that are at or before tsn 3082163953Srrs */ 3083163953Srrs struct sctp_stream_reset_list *liste; 3084163953Srrs int siz; 3085163953Srrs 3086163953Srrs siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t)); 3087163953Srrs SCTP_MALLOC(liste, struct sctp_stream_reset_list *, 3088163953Srrs siz, "StrRstList"); 3089163953Srrs if (liste == NULL) { 3090163953Srrs /* gak out of memory */ 3091163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_DENIED); 3092163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_DENIED; 3093163953Srrs return; 3094163953Srrs } 3095163953Srrs liste->tsn = tsn; 3096163953Srrs liste->number_entries = number_entries; 3097163953Srrs memcpy(&liste->req, req, 3098163953Srrs (sizeof(struct sctp_stream_reset_out_request) + (number_entries * sizeof(uint16_t)))); 3099163953Srrs TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp); 3100163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 3101163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3102163953Srrs } 3103163953Srrs asoc->str_reset_seq_in++; 3104163953Srrs } else if ((asoc->str_reset_seq_in - 1) == seq) { 3105163953Srrs /* 3106163953Srrs * one seq back, just echo back last action since my 3107163953Srrs * response was lost. 3108163953Srrs */ 3109163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 3110163953Srrs } else if ((asoc->str_reset_seq_in - 2) == seq) { 3111163953Srrs /* 3112163953Srrs * two seq back, just echo back last action since my 3113163953Srrs * response was lost. 3114163953Srrs */ 3115163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 3116163953Srrs } else { 3117163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 3118163953Srrs } 3119163953Srrs} 3120163953Srrs 3121163953Srrsstatic int 3122163953Srrssctp_handle_stream_reset(struct sctp_tcb *stcb, struct sctp_stream_reset_out_req *sr_req) 3123163953Srrs{ 3124163953Srrs int chk_length, param_len, ptype; 3125163953Srrs uint32_t seq; 3126163953Srrs int num_req = 0; 3127163953Srrs struct sctp_tmit_chunk *chk; 3128163953Srrs struct sctp_chunkhdr *ch; 3129163953Srrs struct sctp_paramhdr *ph; 3130166675Srrs int ret_code = 0; 3131166675Srrs int num_param = 0; 3132163953Srrs 3133163953Srrs /* now it may be a reset or a reset-response */ 3134163953Srrs chk_length = ntohs(sr_req->ch.chunk_length); 3135163953Srrs 3136163953Srrs /* setup for adding the response */ 3137163953Srrs sctp_alloc_a_chunk(stcb, chk); 3138163953Srrs if (chk == NULL) { 3139163953Srrs return (ret_code); 3140163953Srrs } 3141163953Srrs chk->rec.chunk_id.id = SCTP_STREAM_RESET; 3142163953Srrs chk->asoc = &stcb->asoc; 3143163953Srrs chk->no_fr_allowed = 0; 3144163953Srrs chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr); 3145166023Srrs chk->book_size_scale = 0; 3146165647Srrs chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 3147163953Srrs if (chk->data == NULL) { 3148163953Srrsstrres_nochunk: 3149163953Srrs if (chk->data) { 3150163953Srrs sctp_m_freem(chk->data); 3151163953Srrs chk->data = NULL; 3152163953Srrs } 3153163953Srrs sctp_free_a_chunk(stcb, chk); 3154163953Srrs return (ret_code); 3155163953Srrs } 3156165647Srrs SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 3157163953Srrs 3158163953Srrs /* setup chunk parameters */ 3159163953Srrs chk->sent = SCTP_DATAGRAM_UNSENT; 3160163953Srrs chk->snd_count = 0; 3161163953Srrs chk->whoTo = stcb->asoc.primary_destination; 3162163953Srrs atomic_add_int(&chk->whoTo->ref_count, 1); 3163163953Srrs 3164163953Srrs ch = mtod(chk->data, struct sctp_chunkhdr *); 3165163953Srrs ch->chunk_type = SCTP_STREAM_RESET; 3166163953Srrs ch->chunk_flags = 0; 3167163953Srrs ch->chunk_length = htons(chk->send_size); 3168165647Srrs SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 3169163953Srrs 3170163953Srrs ph = (struct sctp_paramhdr *)&sr_req->sr_req; 3171163953Srrs while ((size_t)chk_length >= sizeof(struct sctp_stream_reset_tsn_request)) { 3172163953Srrs param_len = ntohs(ph->param_length); 3173163953Srrs if (param_len < (int)sizeof(struct sctp_stream_reset_tsn_request)) { 3174163953Srrs /* bad param */ 3175163953Srrs break; 3176163953Srrs } 3177163953Srrs ptype = ntohs(ph->param_type); 3178163953Srrs num_param++; 3179163953Srrs if (num_param > SCTP_MAX_RESET_PARAMS) { 3180163953Srrs /* hit the max of parameters already sorry.. */ 3181163953Srrs break; 3182163953Srrs } 3183163953Srrs if (ptype == SCTP_STR_RESET_OUT_REQUEST) { 3184163953Srrs struct sctp_stream_reset_out_request *req_out; 3185163953Srrs 3186163953Srrs req_out = (struct sctp_stream_reset_out_request *)ph; 3187163953Srrs num_req++; 3188163953Srrs if (stcb->asoc.stream_reset_outstanding) { 3189163953Srrs seq = ntohl(req_out->response_seq); 3190163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 3191163953Srrs /* implicit ack */ 3192163953Srrs sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_PERFORMED, NULL); 3193163953Srrs } 3194163953Srrs } 3195163953Srrs sctp_handle_str_reset_request_out(stcb, chk, req_out); 3196163953Srrs } else if (ptype == SCTP_STR_RESET_IN_REQUEST) { 3197163953Srrs struct sctp_stream_reset_in_request *req_in; 3198163953Srrs 3199163953Srrs num_req++; 3200163953Srrs req_in = (struct sctp_stream_reset_in_request *)ph; 3201163953Srrs sctp_handle_str_reset_request_in(stcb, chk, req_in); 3202163953Srrs } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) { 3203163953Srrs struct sctp_stream_reset_tsn_request *req_tsn; 3204163953Srrs 3205163953Srrs num_req++; 3206163953Srrs req_tsn = (struct sctp_stream_reset_tsn_request *)ph; 3207163953Srrs if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) { 3208163953Srrs ret_code = 1; 3209163953Srrs goto strres_nochunk; 3210163953Srrs } 3211163953Srrs /* no more */ 3212163953Srrs break; 3213163953Srrs } else if (ptype == SCTP_STR_RESET_RESPONSE) { 3214163953Srrs struct sctp_stream_reset_response *resp; 3215163953Srrs uint32_t result; 3216163953Srrs 3217163953Srrs resp = (struct sctp_stream_reset_response *)ph; 3218163953Srrs seq = ntohl(resp->response_seq); 3219163953Srrs result = ntohl(resp->result); 3220163953Srrs if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) { 3221163953Srrs ret_code = 1; 3222163953Srrs goto strres_nochunk; 3223163953Srrs } 3224163953Srrs } else { 3225163953Srrs break; 3226163953Srrs } 3227163953Srrs 3228163953Srrs ph = (struct sctp_paramhdr *)((caddr_t)ph + SCTP_SIZE32(param_len)); 3229163953Srrs chk_length -= SCTP_SIZE32(param_len); 3230163953Srrs } 3231163953Srrs if (num_req == 0) { 3232163953Srrs /* we have no response free the stuff */ 3233163953Srrs goto strres_nochunk; 3234163953Srrs } 3235163953Srrs /* ok we have a chunk to link in */ 3236163953Srrs TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, 3237163953Srrs chk, 3238163953Srrs sctp_next); 3239163953Srrs stcb->asoc.ctrl_queue_cnt++; 3240163953Srrs return (ret_code); 3241163953Srrs} 3242163953Srrs 3243163953Srrs/* 3244163953Srrs * Handle a router or endpoints report of a packet loss, there are two ways 3245163953Srrs * to handle this, either we get the whole packet and must disect it 3246163953Srrs * ourselves (possibly with truncation and or corruption) or it is a summary 3247163953Srrs * from a middle box that did the disectting for us. 3248163953Srrs */ 3249163953Srrsstatic void 3250163953Srrssctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp, 3251163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 3252163953Srrs{ 3253163953Srrs uint32_t bottle_bw, on_queue; 3254163953Srrs uint16_t trunc_len; 3255163953Srrs unsigned int chlen; 3256163953Srrs unsigned int at; 3257163953Srrs struct sctp_chunk_desc desc; 3258163953Srrs struct sctp_chunkhdr *ch; 3259163953Srrs 3260163953Srrs chlen = ntohs(cp->ch.chunk_length); 3261163953Srrs chlen -= sizeof(struct sctp_pktdrop_chunk); 3262163953Srrs /* XXX possible chlen underflow */ 3263163953Srrs if (chlen == 0) { 3264163953Srrs ch = NULL; 3265163953Srrs if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) 3266163953Srrs SCTP_STAT_INCR(sctps_pdrpbwrpt); 3267163953Srrs } else { 3268163953Srrs ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr)); 3269163953Srrs chlen -= sizeof(struct sctphdr); 3270163953Srrs /* XXX possible chlen underflow */ 3271163953Srrs memset(&desc, 0, sizeof(desc)); 3272163953Srrs } 3273163953Srrs trunc_len = (uint16_t) ntohs(cp->trunc_len); 3274163953Srrs /* now the chunks themselves */ 3275163953Srrs while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) { 3276163953Srrs desc.chunk_type = ch->chunk_type; 3277163953Srrs /* get amount we need to move */ 3278163953Srrs at = ntohs(ch->chunk_length); 3279163953Srrs if (at < sizeof(struct sctp_chunkhdr)) { 3280163953Srrs /* corrupt chunk, maybe at the end? */ 3281163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3282163953Srrs break; 3283163953Srrs } 3284163953Srrs if (trunc_len == 0) { 3285163953Srrs /* we are supposed to have all of it */ 3286163953Srrs if (at > chlen) { 3287163953Srrs /* corrupt skip it */ 3288163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3289163953Srrs break; 3290163953Srrs } 3291163953Srrs } else { 3292163953Srrs /* is there enough of it left ? */ 3293163953Srrs if (desc.chunk_type == SCTP_DATA) { 3294163953Srrs if (chlen < (sizeof(struct sctp_data_chunk) + 3295163953Srrs sizeof(desc.data_bytes))) { 3296163953Srrs break; 3297163953Srrs } 3298163953Srrs } else { 3299163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3300163953Srrs break; 3301163953Srrs } 3302163953Srrs } 3303163953Srrs } 3304163953Srrs if (desc.chunk_type == SCTP_DATA) { 3305163953Srrs /* can we get out the tsn? */ 3306163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3307163953Srrs SCTP_STAT_INCR(sctps_pdrpmbda); 3308163953Srrs 3309163953Srrs if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) { 3310163953Srrs /* yep */ 3311163953Srrs struct sctp_data_chunk *dcp; 3312163953Srrs uint8_t *ddp; 3313163953Srrs unsigned int iii; 3314163953Srrs 3315163953Srrs dcp = (struct sctp_data_chunk *)ch; 3316163953Srrs ddp = (uint8_t *) (dcp + 1); 3317163953Srrs for (iii = 0; iii < sizeof(desc.data_bytes); iii++) { 3318163953Srrs desc.data_bytes[iii] = ddp[iii]; 3319163953Srrs } 3320163953Srrs desc.tsn_ifany = dcp->dp.tsn; 3321163953Srrs } else { 3322163953Srrs /* nope we are done. */ 3323163953Srrs SCTP_STAT_INCR(sctps_pdrpnedat); 3324163953Srrs break; 3325163953Srrs } 3326163953Srrs } else { 3327163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3328163953Srrs SCTP_STAT_INCR(sctps_pdrpmbct); 3329163953Srrs } 3330163953Srrs 3331163953Srrs if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) { 3332163953Srrs SCTP_STAT_INCR(sctps_pdrppdbrk); 3333163953Srrs break; 3334163953Srrs } 3335163953Srrs if (SCTP_SIZE32(at) > chlen) { 3336163953Srrs break; 3337163953Srrs } 3338163953Srrs chlen -= SCTP_SIZE32(at); 3339163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3340163953Srrs /* done, none left */ 3341163953Srrs break; 3342163953Srrs } 3343163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at)); 3344163953Srrs } 3345163953Srrs /* Now update any rwnd --- possibly */ 3346163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) { 3347163953Srrs /* From a peer, we get a rwnd report */ 3348163953Srrs uint32_t a_rwnd; 3349163953Srrs 3350163953Srrs SCTP_STAT_INCR(sctps_pdrpfehos); 3351163953Srrs 3352163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3353163953Srrs on_queue = ntohl(cp->current_onq); 3354163953Srrs if (bottle_bw && on_queue) { 3355163953Srrs /* a rwnd report is in here */ 3356163953Srrs if (bottle_bw > on_queue) 3357163953Srrs a_rwnd = bottle_bw - on_queue; 3358163953Srrs else 3359163953Srrs a_rwnd = 0; 3360163953Srrs 3361163953Srrs if (a_rwnd == 0) 3362163953Srrs stcb->asoc.peers_rwnd = 0; 3363163953Srrs else { 3364163953Srrs if (a_rwnd > stcb->asoc.total_flight) { 3365163953Srrs stcb->asoc.peers_rwnd = 3366163953Srrs a_rwnd - stcb->asoc.total_flight; 3367163953Srrs } else { 3368163953Srrs stcb->asoc.peers_rwnd = 0; 3369163953Srrs } 3370163953Srrs if (stcb->asoc.peers_rwnd < 3371163953Srrs stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 3372163953Srrs /* SWS sender side engages */ 3373163953Srrs stcb->asoc.peers_rwnd = 0; 3374163953Srrs } 3375163953Srrs } 3376163953Srrs } 3377163953Srrs } else { 3378163953Srrs SCTP_STAT_INCR(sctps_pdrpfmbox); 3379163953Srrs } 3380163953Srrs 3381163953Srrs /* now middle boxes in sat networks get a cwnd bump */ 3382163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) && 3383163953Srrs (stcb->asoc.sat_t3_loss_recovery == 0) && 3384163953Srrs (stcb->asoc.sat_network)) { 3385163953Srrs /* 3386163953Srrs * This is debateable but for sat networks it makes sense 3387163953Srrs * Note if a T3 timer has went off, we will prohibit any 3388163953Srrs * changes to cwnd until we exit the t3 loss recovery. 3389163953Srrs */ 3390163953Srrs uint32_t bw_avail; 3391163953Srrs int rtt, incr; 3392163953Srrs 3393163953Srrs#ifdef SCTP_CWND_MONITOR 3394163953Srrs int old_cwnd = net->cwnd; 3395163953Srrs 3396163953Srrs#endif 3397163953Srrs /* need real RTT for this calc */ 3398163953Srrs rtt = ((net->lastsa >> 2) + net->lastsv) >> 1; 3399163953Srrs /* get bottle neck bw */ 3400163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3401163953Srrs /* and whats on queue */ 3402163953Srrs on_queue = ntohl(cp->current_onq); 3403163953Srrs /* 3404163953Srrs * adjust the on-queue if our flight is more it could be 3405163953Srrs * that the router has not yet gotten data "in-flight" to it 3406163953Srrs */ 3407163953Srrs if (on_queue < net->flight_size) 3408163953Srrs on_queue = net->flight_size; 3409163953Srrs 3410163953Srrs /* calculate the available space */ 3411163953Srrs bw_avail = (bottle_bw * rtt) / 1000; 3412163953Srrs if (bw_avail > bottle_bw) { 3413163953Srrs /* 3414163953Srrs * Cap the growth to no more than the bottle neck. 3415163953Srrs * This can happen as RTT slides up due to queues. 3416163953Srrs * It also means if you have more than a 1 second 3417163953Srrs * RTT with a empty queue you will be limited to the 3418163953Srrs * bottle_bw per second no matter if other points 3419163953Srrs * have 1/2 the RTT and you could get more out... 3420163953Srrs */ 3421163953Srrs bw_avail = bottle_bw; 3422163953Srrs } 3423163953Srrs if (on_queue > bw_avail) { 3424163953Srrs /* 3425163953Srrs * No room for anything else don't allow anything 3426163953Srrs * else to be "added to the fire". 3427163953Srrs */ 3428163953Srrs int seg_inflight, seg_onqueue, my_portion; 3429163953Srrs 3430163953Srrs net->partial_bytes_acked = 0; 3431163953Srrs 3432163953Srrs /* how much are we over queue size? */ 3433163953Srrs incr = on_queue - bw_avail; 3434163953Srrs if (stcb->asoc.seen_a_sack_this_pkt) { 3435163953Srrs /* 3436163953Srrs * undo any cwnd adjustment that the sack 3437163953Srrs * might have made 3438163953Srrs */ 3439163953Srrs net->cwnd = net->prev_cwnd; 3440163953Srrs } 3441163953Srrs /* Now how much of that is mine? */ 3442163953Srrs seg_inflight = net->flight_size / net->mtu; 3443163953Srrs seg_onqueue = on_queue / net->mtu; 3444163953Srrs my_portion = (incr * seg_inflight) / seg_onqueue; 3445163953Srrs 3446163953Srrs /* Have I made an adjustment already */ 3447163953Srrs if (net->cwnd > net->flight_size) { 3448163953Srrs /* 3449163953Srrs * for this flight I made an adjustment we 3450163953Srrs * need to decrease the portion by a share 3451163953Srrs * our previous adjustment. 3452163953Srrs */ 3453163953Srrs int diff_adj; 3454163953Srrs 3455163953Srrs diff_adj = net->cwnd - net->flight_size; 3456163953Srrs if (diff_adj > my_portion) 3457163953Srrs my_portion = 0; 3458163953Srrs else 3459163953Srrs my_portion -= diff_adj; 3460163953Srrs } 3461163953Srrs /* 3462163953Srrs * back down to the previous cwnd (assume we have 3463163953Srrs * had a sack before this packet). minus what ever 3464163953Srrs * portion of the overage is my fault. 3465163953Srrs */ 3466163953Srrs net->cwnd -= my_portion; 3467163953Srrs 3468163953Srrs /* we will NOT back down more than 1 MTU */ 3469163953Srrs if (net->cwnd <= net->mtu) { 3470163953Srrs net->cwnd = net->mtu; 3471163953Srrs } 3472163953Srrs /* force into CA */ 3473163953Srrs net->ssthresh = net->cwnd - 1; 3474163953Srrs } else { 3475163953Srrs /* 3476163953Srrs * Take 1/4 of the space left or max burst up .. 3477163953Srrs * whichever is less. 3478163953Srrs */ 3479163953Srrs incr = min((bw_avail - on_queue) >> 2, 3480163953Srrs (int)stcb->asoc.max_burst * (int)net->mtu); 3481163953Srrs net->cwnd += incr; 3482163953Srrs } 3483163953Srrs if (net->cwnd > bw_avail) { 3484163953Srrs /* We can't exceed the pipe size */ 3485163953Srrs net->cwnd = bw_avail; 3486163953Srrs } 3487163953Srrs if (net->cwnd < net->mtu) { 3488163953Srrs /* We always have 1 MTU */ 3489163953Srrs net->cwnd = net->mtu; 3490163953Srrs } 3491163953Srrs#ifdef SCTP_CWND_MONITOR 3492163953Srrs if (net->cwnd - old_cwnd != 0) { 3493163953Srrs /* log only changes */ 3494163953Srrs sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), 3495163953Srrs SCTP_CWND_LOG_FROM_SAT); 3496163953Srrs } 3497163953Srrs#endif 3498163953Srrs } 3499163953Srrs} 3500163953Srrs 3501163953Srrsextern int sctp_strict_init; 3502163953Srrsextern int sctp_abort_if_one_2_one_hits_limit; 3503163953Srrs 3504163953Srrs/* 3505163953Srrs * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to 3506163953Srrs * still contain IP/SCTP header - stcb: is the tcb found for this packet - 3507163953Srrs * offset: offset into the mbuf chain to first chunkhdr - length: is the 3508163953Srrs * length of the complete packet outputs: - length: modified to remaining 3509163953Srrs * length after control processing - netp: modified to new sctp_nets after 3510163953Srrs * cookie-echo processing - return NULL to discard the packet (ie. no asoc, 3511163953Srrs * bad packet,...) otherwise return the tcb for this packet 3512163953Srrs */ 3513163953Srrsstatic struct sctp_tcb * 3514163953Srrssctp_process_control(struct mbuf *m, int iphlen, int *offset, int length, 3515163953Srrs struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp, 3516163953Srrs struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen) 3517163953Srrs{ 3518163953Srrs struct sctp_association *asoc; 3519163953Srrs uint32_t vtag_in; 3520163953Srrs int num_chunks = 0; /* number of control chunks processed */ 3521163953Srrs int chk_length; 3522163953Srrs int ret; 3523163953Srrs 3524163953Srrs /* 3525163953Srrs * How big should this be, and should it be alloc'd? Lets try the 3526163953Srrs * d-mtu-ceiling for now (2k) and that should hopefully work ... 3527163953Srrs * until we get into jumbo grams and such.. 3528163953Srrs */ 3529166675Srrs uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE]; 3530163953Srrs struct sctp_tcb *locked_tcb = stcb; 3531163953Srrs int got_auth = 0; 3532163953Srrs uint32_t auth_offset = 0, auth_len = 0; 3533163953Srrs int auth_skipped = 0; 3534163953Srrs 3535163953Srrs#ifdef SCTP_DEBUG 3536163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 3537163953Srrs printf("sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n", 3538163953Srrs iphlen, *offset, length, stcb); 3539163953Srrs } 3540163953Srrs#endif /* SCTP_DEBUG */ 3541163953Srrs 3542163953Srrs /* validate chunk header length... */ 3543163953Srrs if (ntohs(ch->chunk_length) < sizeof(*ch)) { 3544163953Srrs return (NULL); 3545163953Srrs } 3546163953Srrs /* 3547163953Srrs * validate the verification tag 3548163953Srrs */ 3549163953Srrs vtag_in = ntohl(sh->v_tag); 3550163953Srrs 3551165220Srrs if (locked_tcb) { 3552165220Srrs SCTP_TCB_LOCK_ASSERT(locked_tcb); 3553165220Srrs } 3554163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 3555163953Srrs if (vtag_in != 0) { 3556163953Srrs /* protocol error- silently discard... */ 3557163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3558163953Srrs if (locked_tcb) 3559163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3560163953Srrs return (NULL); 3561163953Srrs } 3562163953Srrs } else if (ch->chunk_type != SCTP_COOKIE_ECHO) { 3563163953Srrs /* 3564163953Srrs * If there is no stcb, skip the AUTH chunk and process 3565163953Srrs * later after a stcb is found (to validate the lookup was 3566163953Srrs * valid. 3567163953Srrs */ 3568163953Srrs if ((ch->chunk_type == SCTP_AUTHENTICATION) && 3569163953Srrs (stcb == NULL) && !sctp_auth_disable) { 3570163953Srrs /* save this chunk for later processing */ 3571163953Srrs auth_skipped = 1; 3572163953Srrs auth_offset = *offset; 3573163953Srrs auth_len = ntohs(ch->chunk_length); 3574163953Srrs 3575163953Srrs /* (temporarily) move past this chunk */ 3576163953Srrs *offset += SCTP_SIZE32(auth_len); 3577163953Srrs if (*offset >= length) { 3578163953Srrs /* no more data left in the mbuf chain */ 3579163953Srrs *offset = length; 3580163953Srrs return (NULL); 3581163953Srrs } 3582163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3583163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 3584163953Srrs } 3585163953Srrs if (ch->chunk_type == SCTP_COOKIE_ECHO) { 3586163953Srrs goto process_control_chunks; 3587163953Srrs } 3588163953Srrs /* 3589163953Srrs * first check if it's an ASCONF with an unknown src addr we 3590163953Srrs * need to look inside to find the association 3591163953Srrs */ 3592163953Srrs if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) { 3593163953Srrs /* inp's refcount may be reduced */ 3594163953Srrs SCTP_INP_INCR_REF(inp); 3595163953Srrs 3596163953Srrs stcb = sctp_findassociation_ep_asconf(m, iphlen, 3597163953Srrs *offset, sh, &inp, netp); 3598163953Srrs if (stcb == NULL) { 3599163953Srrs /* 3600163953Srrs * reduce inp's refcount if not reduced in 3601163953Srrs * sctp_findassociation_ep_asconf(). 3602163953Srrs */ 3603163953Srrs SCTP_INP_DECR_REF(inp); 3604163953Srrs } 3605163953Srrs /* now go back and verify any auth chunk to be sure */ 3606163953Srrs if (auth_skipped && (stcb != NULL)) { 3607163953Srrs struct sctp_auth_chunk *auth; 3608163953Srrs 3609163953Srrs auth = (struct sctp_auth_chunk *) 3610163953Srrs sctp_m_getptr(m, auth_offset, 3611163953Srrs auth_len, chunk_buf); 3612163953Srrs got_auth = 1; 3613163953Srrs auth_skipped = 0; 3614163953Srrs if (sctp_handle_auth(stcb, auth, m, 3615163953Srrs auth_offset)) { 3616163953Srrs /* auth HMAC failed so dump it */ 3617163953Srrs *offset = length; 3618163953Srrs return (NULL); 3619163953Srrs } else { 3620163953Srrs /* remaining chunks are HMAC checked */ 3621163953Srrs stcb->asoc.authenticated = 1; 3622163953Srrs } 3623163953Srrs } 3624163953Srrs } 3625163953Srrs if (stcb == NULL) { 3626163953Srrs /* no association, so it's out of the blue... */ 3627163953Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, NULL); 3628163953Srrs *offset = length; 3629163953Srrs if (locked_tcb) 3630163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3631163953Srrs return (NULL); 3632163953Srrs } 3633163953Srrs asoc = &stcb->asoc; 3634163953Srrs /* ABORT and SHUTDOWN can use either v_tag... */ 3635163953Srrs if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) || 3636163953Srrs (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) || 3637163953Srrs (ch->chunk_type == SCTP_PACKET_DROPPED)) { 3638163953Srrs if ((vtag_in == asoc->my_vtag) || 3639163953Srrs ((ch->chunk_flags & SCTP_HAD_NO_TCB) && 3640163953Srrs (vtag_in == asoc->peer_vtag))) { 3641163953Srrs /* this is valid */ 3642163953Srrs } else { 3643163953Srrs /* drop this packet... */ 3644163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3645163953Srrs if (locked_tcb) 3646163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3647163953Srrs return (NULL); 3648163953Srrs } 3649163953Srrs } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 3650163953Srrs if (vtag_in != asoc->my_vtag) { 3651163953Srrs /* 3652163953Srrs * this could be a stale SHUTDOWN-ACK or the 3653163953Srrs * peer never got the SHUTDOWN-COMPLETE and 3654163953Srrs * is still hung; we have started a new asoc 3655163953Srrs * but it won't complete until the shutdown 3656163953Srrs * is completed 3657163953Srrs */ 3658163953Srrs if (locked_tcb) 3659163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3660163953Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, 3661163953Srrs NULL); 3662163953Srrs return (NULL); 3663163953Srrs } 3664163953Srrs } else { 3665163953Srrs /* for all other chunks, vtag must match */ 3666163953Srrs if (vtag_in != asoc->my_vtag) { 3667163953Srrs /* invalid vtag... */ 3668163953Srrs#ifdef SCTP_DEBUG 3669163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3670163953Srrs printf("invalid vtag: %xh, expect %xh\n", vtag_in, asoc->my_vtag); 3671163953Srrs } 3672163953Srrs#endif /* SCTP_DEBUG */ 3673163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3674163953Srrs if (locked_tcb) 3675163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3676163953Srrs *offset = length; 3677163953Srrs return (NULL); 3678163953Srrs } 3679163953Srrs } 3680163953Srrs } /* end if !SCTP_COOKIE_ECHO */ 3681163953Srrs /* 3682163953Srrs * process all control chunks... 3683163953Srrs */ 3684163953Srrs if (((ch->chunk_type == SCTP_SELECTIVE_ACK) || 3685163953Srrs (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) && 3686163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 3687163953Srrs /* implied cookie-ack.. we must have lost the ack */ 3688163953Srrs stcb->asoc.overall_error_count = 0; 3689163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, 3690163953Srrs *netp); 3691163953Srrs } 3692163953Srrsprocess_control_chunks: 3693163953Srrs 3694163953Srrs while (IS_SCTP_CONTROL(ch)) { 3695163953Srrs /* validate chunk length */ 3696163953Srrs chk_length = ntohs(ch->chunk_length); 3697163953Srrs#ifdef SCTP_DEBUG 3698163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 3699163953Srrs printf("sctp_process_control: processing a chunk type=%u, len=%u\n", 3700163953Srrs ch->chunk_type, chk_length); 3701163953Srrs } 3702163953Srrs#endif /* SCTP_DEBUG */ 3703163953Srrs if ((size_t)chk_length < sizeof(*ch) || 3704163953Srrs (*offset + chk_length) > length) { 3705163953Srrs *offset = length; 3706163953Srrs if (locked_tcb) 3707163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3708163953Srrs return (NULL); 3709163953Srrs } 3710163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks); 3711163953Srrs /* 3712163953Srrs * INIT-ACK only gets the init ack "header" portion only 3713163953Srrs * because we don't have to process the peer's COOKIE. All 3714163953Srrs * others get a complete chunk. 3715163953Srrs */ 3716163953Srrs if (ch->chunk_type == SCTP_INITIATION_ACK) { 3717163953Srrs /* get an init-ack chunk */ 3718163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3719163953Srrs sizeof(struct sctp_init_ack_chunk), chunk_buf); 3720163953Srrs if (ch == NULL) { 3721163953Srrs *offset = length; 3722163953Srrs if (locked_tcb) 3723163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3724163953Srrs return (NULL); 3725163953Srrs } 3726163953Srrs } else { 3727163953Srrs /* get a complete chunk... */ 3728163953Srrs if ((size_t)chk_length > sizeof(chunk_buf)) { 3729163953Srrs struct mbuf *oper; 3730163953Srrs struct sctp_paramhdr *phdr; 3731163953Srrs 3732163953Srrs oper = NULL; 3733163953Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3734165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 3735163953Srrs if (oper) { 3736163953Srrs /* pre-reserve some space */ 3737165647Srrs SCTP_BUF_RESV_UF(oper, sizeof(struct sctp_chunkhdr)); 3738165647Srrs SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr); 3739163953Srrs phdr = mtod(oper, struct sctp_paramhdr *); 3740163953Srrs phdr->param_type = htons(SCTP_CAUSE_OUT_OF_RESC); 3741163953Srrs phdr->param_length = htons(sizeof(struct sctp_paramhdr)); 3742163953Srrs sctp_queue_op_err(stcb, oper); 3743163953Srrs } 3744163953Srrs if (locked_tcb) 3745163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3746163953Srrs return (NULL); 3747163953Srrs } 3748163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3749163953Srrs chk_length, chunk_buf); 3750163953Srrs if (ch == NULL) { 3751163953Srrs printf("sctp_process_control: Can't get the all data....\n"); 3752163953Srrs *offset = length; 3753163953Srrs if (locked_tcb) 3754163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3755163953Srrs return (NULL); 3756163953Srrs } 3757163953Srrs } 3758163953Srrs num_chunks++; 3759163953Srrs /* Save off the last place we got a control from */ 3760163953Srrs if (stcb != NULL) { 3761163953Srrs if ((*netp != NULL) || (ch->chunk_type == SCTP_ASCONF)) { 3762163953Srrs /* 3763163953Srrs * allow last_control to be NULL if 3764163953Srrs * ASCONF... ASCONF processing will find the 3765163953Srrs * right net later 3766163953Srrs */ 3767163953Srrs stcb->asoc.last_control_chunk_from = *netp; 3768163953Srrs } 3769163953Srrs } 3770163953Srrs#ifdef SCTP_AUDITING_ENABLED 3771163953Srrs sctp_audit_log(0xB0, ch->chunk_type); 3772163953Srrs#endif 3773163953Srrs 3774163953Srrs /* check to see if this chunk required auth, but isn't */ 3775163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 3776163953Srrs sctp_auth_is_required_chunk(ch->chunk_type, 3777163953Srrs stcb->asoc.local_auth_chunks) && 3778163953Srrs !stcb->asoc.authenticated) { 3779163953Srrs /* "silently" ignore */ 3780163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 3781163953Srrs goto next_chunk; 3782163953Srrs } 3783163953Srrs switch (ch->chunk_type) { 3784163953Srrs case SCTP_INITIATION: 3785163953Srrs /* must be first and only chunk */ 3786163953Srrs#ifdef SCTP_DEBUG 3787163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3788163953Srrs printf("SCTP_INIT\n"); 3789163953Srrs } 3790163953Srrs#endif /* SCTP_DEBUG */ 3791163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3792163953Srrs /* We are not interested anymore? */ 3793163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3794163953Srrs /* 3795163953Srrs * collision case where we are 3796163953Srrs * sending to them too 3797163953Srrs */ 3798163953Srrs ; 3799163953Srrs } else { 3800163953Srrs if (locked_tcb) 3801163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3802163953Srrs *offset = length; 3803163953Srrs return (NULL); 3804163953Srrs } 3805163953Srrs } 3806163953Srrs if ((num_chunks > 1) || 3807163953Srrs (sctp_strict_init && (length - *offset > SCTP_SIZE32(chk_length)))) { 3808163953Srrs *offset = length; 3809163953Srrs if (locked_tcb) 3810163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3811163953Srrs return (NULL); 3812163953Srrs } 3813163953Srrs if ((stcb != NULL) && 3814163953Srrs (SCTP_GET_STATE(&stcb->asoc) == 3815163953Srrs SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3816163953Srrs sctp_send_shutdown_ack(stcb, 3817163953Srrs stcb->asoc.primary_destination); 3818163953Srrs *offset = length; 3819163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3820163953Srrs if (locked_tcb) 3821163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3822163953Srrs return (NULL); 3823163953Srrs } 3824163953Srrs sctp_handle_init(m, iphlen, *offset, sh, 3825163953Srrs (struct sctp_init_chunk *)ch, inp, stcb, *netp); 3826163953Srrs *offset = length; 3827163953Srrs if (locked_tcb) 3828163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3829163953Srrs return (NULL); 3830163953Srrs break; 3831163953Srrs case SCTP_INITIATION_ACK: 3832163953Srrs /* must be first and only chunk */ 3833163953Srrs#ifdef SCTP_DEBUG 3834163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3835163953Srrs printf("SCTP_INIT-ACK\n"); 3836163953Srrs } 3837163953Srrs#endif /* SCTP_DEBUG */ 3838163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3839163953Srrs /* We are not interested anymore */ 3840163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3841163953Srrs ; 3842163953Srrs } else { 3843163953Srrs if (locked_tcb) 3844163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3845163953Srrs *offset = length; 3846163953Srrs if (stcb) { 3847165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_26); 3848163953Srrs } 3849163953Srrs return (NULL); 3850163953Srrs } 3851163953Srrs } 3852163953Srrs if ((num_chunks > 1) || 3853163953Srrs (sctp_strict_init && (length - *offset > SCTP_SIZE32(chk_length)))) { 3854163953Srrs *offset = length; 3855163953Srrs if (locked_tcb) 3856163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3857163953Srrs return (NULL); 3858163953Srrs } 3859163953Srrs ret = sctp_handle_init_ack(m, iphlen, *offset, sh, 3860163953Srrs (struct sctp_init_ack_chunk *)ch, stcb, *netp); 3861163953Srrs /* 3862163953Srrs * Special case, I must call the output routine to 3863163953Srrs * get the cookie echoed 3864163953Srrs */ 3865163953Srrs if ((stcb) && ret == 0) 3866163953Srrs sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3867163953Srrs *offset = length; 3868163953Srrs if (locked_tcb) 3869163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3870163953Srrs return (NULL); 3871163953Srrs break; 3872163953Srrs case SCTP_SELECTIVE_ACK: 3873163953Srrs#ifdef SCTP_DEBUG 3874163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3875163953Srrs printf("SCTP_SACK\n"); 3876163953Srrs } 3877163953Srrs#endif /* SCTP_DEBUG */ 3878163953Srrs SCTP_STAT_INCR(sctps_recvsacks); 3879163953Srrs { 3880163953Srrs struct sctp_sack_chunk *sack; 3881163953Srrs int abort_now = 0; 3882163953Srrs uint32_t a_rwnd, cum_ack; 3883163953Srrs uint16_t num_seg; 3884163953Srrs int nonce_sum_flag; 3885163953Srrs 3886163953Srrs sack = (struct sctp_sack_chunk *)ch; 3887163953Srrs 3888163953Srrs nonce_sum_flag = ch->chunk_flags & SCTP_SACK_NONCE_SUM; 3889163953Srrs cum_ack = ntohl(sack->sack.cum_tsn_ack); 3890163953Srrs num_seg = ntohs(sack->sack.num_gap_ack_blks); 3891163953Srrs a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd); 3892163953Srrs stcb->asoc.seen_a_sack_this_pkt = 1; 3893163953Srrs if ((stcb->asoc.pr_sctp_cnt == 0) && 3894163953Srrs (num_seg == 0) && 3895163953Srrs ((compare_with_wrap(cum_ack, stcb->asoc.last_acked_seq, MAX_TSN)) || 3896163953Srrs (cum_ack == stcb->asoc.last_acked_seq)) && 3897163953Srrs (stcb->asoc.saw_sack_with_frags == 0) && 3898163953Srrs (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) 3899163953Srrs ) { 3900163953Srrs /* 3901163953Srrs * We have a SIMPLE sack having no 3902163953Srrs * prior segments and data on sent 3903163953Srrs * queue to be acked.. Use the 3904163953Srrs * faster path sack processing. We 3905163953Srrs * also allow window update sacks 3906163953Srrs * with no missing segments to go 3907163953Srrs * this way too. 3908163953Srrs */ 3909163953Srrs sctp_express_handle_sack(stcb, cum_ack, a_rwnd, nonce_sum_flag, &abort_now); 3910163953Srrs } else { 3911163953Srrs sctp_handle_sack(sack, stcb, *netp, &abort_now); 3912163953Srrs } 3913163953Srrs if (abort_now) { 3914163953Srrs /* ABORT signal from sack processing */ 3915163953Srrs *offset = length; 3916163953Srrs return (NULL); 3917163953Srrs } 3918163953Srrs } 3919163953Srrs break; 3920163953Srrs case SCTP_HEARTBEAT_REQUEST: 3921163953Srrs#ifdef SCTP_DEBUG 3922163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3923163953Srrs printf("SCTP_HEARTBEAT\n"); 3924163953Srrs } 3925163953Srrs#endif /* SCTP_DEBUG */ 3926163953Srrs SCTP_STAT_INCR(sctps_recvheartbeat); 3927163953Srrs sctp_send_heartbeat_ack(stcb, m, *offset, chk_length, 3928163953Srrs *netp); 3929163953Srrs 3930163953Srrs /* He's alive so give him credit */ 3931163953Srrs stcb->asoc.overall_error_count = 0; 3932163953Srrs break; 3933163953Srrs case SCTP_HEARTBEAT_ACK: 3934163953Srrs#ifdef SCTP_DEBUG 3935163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3936163953Srrs printf("SCTP_HEARTBEAT-ACK\n"); 3937163953Srrs } 3938163953Srrs#endif /* SCTP_DEBUG */ 3939163953Srrs 3940163953Srrs /* He's alive so give him credit */ 3941163953Srrs stcb->asoc.overall_error_count = 0; 3942163953Srrs SCTP_STAT_INCR(sctps_recvheartbeatack); 3943163953Srrs sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch, 3944163953Srrs stcb, *netp); 3945163953Srrs break; 3946163953Srrs case SCTP_ABORT_ASSOCIATION: 3947163953Srrs#ifdef SCTP_DEBUG 3948163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3949163953Srrs printf("SCTP_ABORT\n"); 3950163953Srrs } 3951163953Srrs#endif /* SCTP_DEBUG */ 3952163953Srrs sctp_handle_abort((struct sctp_abort_chunk *)ch, 3953163953Srrs stcb, *netp); 3954163953Srrs *offset = length; 3955163953Srrs return (NULL); 3956163953Srrs break; 3957163953Srrs case SCTP_SHUTDOWN: 3958163953Srrs#ifdef SCTP_DEBUG 3959163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3960163953Srrs printf("SCTP_SHUTDOWN\n"); 3961163953Srrs } 3962163953Srrs#endif /* SCTP_DEBUG */ 3963163953Srrs { 3964163953Srrs int abort_flag = 0; 3965163953Srrs 3966163953Srrs sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch, 3967163953Srrs stcb, *netp, &abort_flag); 3968163953Srrs if (abort_flag) { 3969163953Srrs *offset = length; 3970163953Srrs return (NULL); 3971163953Srrs } 3972163953Srrs } 3973163953Srrs break; 3974163953Srrs case SCTP_SHUTDOWN_ACK: 3975163953Srrs#ifdef SCTP_DEBUG 3976163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3977163953Srrs printf("SCTP_SHUTDOWN-ACK\n"); 3978163953Srrs } 3979163953Srrs#endif /* SCTP_DEBUG */ 3980163953Srrs sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp); 3981163953Srrs *offset = length; 3982163953Srrs return (NULL); 3983163953Srrs break; 3984163953Srrs case SCTP_OPERATION_ERROR: 3985163953Srrs#ifdef SCTP_DEBUG 3986163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3987163953Srrs printf("SCTP_OP-ERR\n"); 3988163953Srrs } 3989163953Srrs#endif /* SCTP_DEBUG */ 3990163953Srrs if (sctp_handle_error(ch, stcb, *netp) < 0) { 3991163953Srrs *offset = length; 3992163953Srrs return (NULL); 3993163953Srrs } 3994163953Srrs break; 3995163953Srrs case SCTP_COOKIE_ECHO: 3996163953Srrs#ifdef SCTP_DEBUG 3997163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3998163953Srrs printf("SCTP_COOKIE-ECHO stcb is %p\n", stcb); 3999163953Srrs } 4000163953Srrs#endif /* SCTP_DEBUG */ 4001163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 4002163953Srrs ; 4003163953Srrs } else { 4004163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) && 4005163953Srrs (stcb == NULL)) { 4006163953Srrs /* We are not interested anymore */ 4007163953Srrs *offset = length; 4008163953Srrs return (NULL); 4009163953Srrs } 4010163953Srrs } 4011163953Srrs /* 4012163953Srrs * First are we accepting? We do this again here 4013163953Srrs * since it is possible that a previous endpoint WAS 4014163953Srrs * listening responded to a INIT-ACK and then 4015163953Srrs * closed. We opened and bound.. and are now no 4016163953Srrs * longer listening. 4017163953Srrs */ 4018163953Srrs if (inp->sctp_socket->so_qlimit == 0) { 4019163953Srrs if ((stcb) && (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4020163953Srrs /* 4021163953Srrs * special case, is this a retran'd 4022163953Srrs * COOKIE-ECHO or a restarting assoc 4023163953Srrs * that is a peeled off or 4024163953Srrs * one-to-one style socket. 4025163953Srrs */ 4026163953Srrs goto process_cookie_anyway; 4027163953Srrs } 4028163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, 4029163953Srrs NULL); 4030163953Srrs *offset = length; 4031163953Srrs return (NULL); 4032163953Srrs } else if (inp->sctp_socket->so_qlimit) { 4033163953Srrs /* we are accepting so check limits like TCP */ 4034163953Srrs if (inp->sctp_socket->so_qlen > 4035163953Srrs inp->sctp_socket->so_qlimit) { 4036163953Srrs /* no space */ 4037163953Srrs struct mbuf *oper; 4038163953Srrs struct sctp_paramhdr *phdr; 4039163953Srrs 4040163953Srrs if (sctp_abort_if_one_2_one_hits_limit) { 4041163953Srrs oper = NULL; 4042163953Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 4043165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 4044163953Srrs if (oper) { 4045165647Srrs SCTP_BUF_LEN(oper) = 4046163953Srrs sizeof(struct sctp_paramhdr); 4047163953Srrs phdr = mtod(oper, 4048163953Srrs struct sctp_paramhdr *); 4049163953Srrs phdr->param_type = 4050163953Srrs htons(SCTP_CAUSE_OUT_OF_RESC); 4051163953Srrs phdr->param_length = 4052163953Srrs htons(sizeof(struct sctp_paramhdr)); 4053163953Srrs } 4054163953Srrs sctp_abort_association(inp, stcb, m, 4055163953Srrs iphlen, sh, oper); 4056163953Srrs } 4057163953Srrs *offset = length; 4058163953Srrs return (NULL); 4059163953Srrs } 4060163953Srrs } 4061163953Srrs process_cookie_anyway: 4062163953Srrs { 4063163953Srrs struct mbuf *ret_buf; 4064165220Srrs struct sctp_inpcb *linp; 4065163953Srrs 4066165220Srrs if (stcb) 4067165220Srrs linp = NULL; 4068165220Srrs else 4069165220Srrs linp = inp; 4070165220Srrs 4071165220Srrs if (linp) 4072165220Srrs SCTP_ASOC_CREATE_LOCK(linp); 4073163953Srrs ret_buf = 4074163953Srrs sctp_handle_cookie_echo(m, iphlen, 4075163953Srrs *offset, sh, 4076163953Srrs (struct sctp_cookie_echo_chunk *)ch, 4077163953Srrs &inp, &stcb, netp, 4078163953Srrs auth_skipped, 4079163953Srrs auth_offset, 4080165220Srrs auth_len, 4081165220Srrs &locked_tcb); 4082165220Srrs if (linp) 4083165220Srrs SCTP_ASOC_CREATE_UNLOCK(linp); 4084163953Srrs if (ret_buf == NULL) { 4085163953Srrs if (locked_tcb) { 4086163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4087163953Srrs } 4088163953Srrs#ifdef SCTP_DEBUG 4089163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4090163953Srrs printf("GAK, null buffer\n"); 4091163953Srrs } 4092163953Srrs#endif /* SCTP_DEBUG */ 4093163953Srrs auth_skipped = 0; 4094163953Srrs *offset = length; 4095163953Srrs return (NULL); 4096163953Srrs } 4097163953Srrs /* if AUTH skipped, see if it verified... */ 4098163953Srrs if (auth_skipped) { 4099163953Srrs got_auth = 1; 4100163953Srrs auth_skipped = 0; 4101163953Srrs } 4102163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 4103163953Srrs /* 4104163953Srrs * Restart the timer if we have 4105163953Srrs * pending data 4106163953Srrs */ 4107163953Srrs struct sctp_tmit_chunk *chk; 4108163953Srrs 4109163953Srrs chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 4110163953Srrs if (chk) { 4111163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, 4112163953Srrs stcb->sctp_ep, stcb, 4113163953Srrs chk->whoTo); 4114163953Srrs } 4115163953Srrs } 4116163953Srrs } 4117163953Srrs break; 4118163953Srrs case SCTP_COOKIE_ACK: 4119163953Srrs#ifdef SCTP_DEBUG 4120163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4121163953Srrs printf("SCTP_COOKIE-ACK\n"); 4122163953Srrs } 4123163953Srrs#endif /* SCTP_DEBUG */ 4124163953Srrs 4125163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4126163953Srrs /* We are not interested anymore */ 4127163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 4128163953Srrs ; 4129163953Srrs } else { 4130165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27); 4131163953Srrs *offset = length; 4132163953Srrs return (NULL); 4133163953Srrs } 4134163953Srrs } 4135163953Srrs /* He's alive so give him credit */ 4136163953Srrs stcb->asoc.overall_error_count = 0; 4137163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp); 4138163953Srrs break; 4139163953Srrs case SCTP_ECN_ECHO: 4140163953Srrs#ifdef SCTP_DEBUG 4141163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4142163953Srrs printf("SCTP_ECN-ECHO\n"); 4143163953Srrs } 4144163953Srrs#endif /* SCTP_DEBUG */ 4145163953Srrs /* He's alive so give him credit */ 4146163953Srrs stcb->asoc.overall_error_count = 0; 4147163953Srrs sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, 4148163953Srrs stcb); 4149163953Srrs break; 4150163953Srrs case SCTP_ECN_CWR: 4151163953Srrs#ifdef SCTP_DEBUG 4152163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4153163953Srrs printf("SCTP_ECN-CWR\n"); 4154163953Srrs } 4155163953Srrs#endif /* SCTP_DEBUG */ 4156163953Srrs /* He's alive so give him credit */ 4157163953Srrs stcb->asoc.overall_error_count = 0; 4158163953Srrs 4159163953Srrs sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb); 4160163953Srrs break; 4161163953Srrs case SCTP_SHUTDOWN_COMPLETE: 4162163953Srrs#ifdef SCTP_DEBUG 4163163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4164163953Srrs printf("SCTP_SHUTDOWN-COMPLETE\n"); 4165163953Srrs } 4166163953Srrs#endif /* SCTP_DEBUG */ 4167163953Srrs /* must be first and only chunk */ 4168163953Srrs if ((num_chunks > 1) || 4169163953Srrs (length - *offset > SCTP_SIZE32(chk_length))) { 4170163953Srrs *offset = length; 4171163953Srrs if (locked_tcb) 4172163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4173163953Srrs 4174163953Srrs return (NULL); 4175163953Srrs } 4176163953Srrs sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch, 4177163953Srrs stcb, *netp); 4178163953Srrs *offset = length; 4179163953Srrs return (NULL); 4180163953Srrs break; 4181163953Srrs case SCTP_ASCONF: 4182163953Srrs#ifdef SCTP_DEBUG 4183163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4184163953Srrs printf("SCTP_ASCONF\n"); 4185163953Srrs } 4186163953Srrs#endif /* SCTP_DEBUG */ 4187163953Srrs /* He's alive so give him credit */ 4188163953Srrs stcb->asoc.overall_error_count = 0; 4189163953Srrs 4190163953Srrs sctp_handle_asconf(m, *offset, 4191163953Srrs (struct sctp_asconf_chunk *)ch, stcb); 4192163953Srrs break; 4193163953Srrs case SCTP_ASCONF_ACK: 4194163953Srrs#ifdef SCTP_DEBUG 4195163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4196163953Srrs printf("SCTP_ASCONF-ACK\n"); 4197163953Srrs } 4198163953Srrs#endif /* SCTP_DEBUG */ 4199163953Srrs /* He's alive so give him credit */ 4200163953Srrs stcb->asoc.overall_error_count = 0; 4201163953Srrs 4202163953Srrs sctp_handle_asconf_ack(m, *offset, 4203163953Srrs (struct sctp_asconf_ack_chunk *)ch, stcb, *netp); 4204163953Srrs break; 4205163953Srrs case SCTP_FORWARD_CUM_TSN: 4206163953Srrs#ifdef SCTP_DEBUG 4207163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4208163953Srrs printf("SCTP_FWD-TSN\n"); 4209163953Srrs } 4210163953Srrs#endif /* SCTP_DEBUG */ 4211163953Srrs /* He's alive so give him credit */ 4212163953Srrs { 4213163953Srrs int abort_flag = 0; 4214163953Srrs 4215163953Srrs stcb->asoc.overall_error_count = 0; 4216163953Srrs *fwd_tsn_seen = 1; 4217163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4218163953Srrs /* We are not interested anymore */ 4219165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28); 4220163953Srrs *offset = length; 4221163953Srrs return (NULL); 4222163953Srrs } 4223163953Srrs sctp_handle_forward_tsn(stcb, 4224163953Srrs (struct sctp_forward_tsn_chunk *)ch, &abort_flag); 4225163953Srrs if (abort_flag) { 4226163953Srrs *offset = length; 4227163953Srrs return (NULL); 4228163953Srrs } else { 4229163953Srrs stcb->asoc.overall_error_count = 0; 4230163953Srrs } 4231163953Srrs 4232163953Srrs } 4233163953Srrs break; 4234163953Srrs case SCTP_STREAM_RESET: 4235163953Srrs#ifdef SCTP_DEBUG 4236163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4237163953Srrs printf("SCTP_STREAM_RESET\n"); 4238163953Srrs } 4239163953Srrs#endif /* SCTP_DEBUG */ 4240163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4241163953Srrs chk_length, chunk_buf); 4242163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4243163953Srrs /* We are not interested anymore */ 4244165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_29); 4245163953Srrs *offset = length; 4246163953Srrs return (NULL); 4247163953Srrs } 4248163953Srrs if (stcb->asoc.peer_supports_strreset == 0) { 4249163953Srrs /* 4250163953Srrs * hmm, peer should have announced this, but 4251163953Srrs * we will turn it on since he is sending us 4252163953Srrs * a stream reset. 4253163953Srrs */ 4254163953Srrs stcb->asoc.peer_supports_strreset = 1; 4255163953Srrs } 4256163953Srrs if (sctp_handle_stream_reset(stcb, (struct sctp_stream_reset_out_req *)ch)) { 4257163953Srrs /* stop processing */ 4258163953Srrs *offset = length; 4259163953Srrs return (NULL); 4260163953Srrs } 4261163953Srrs break; 4262163953Srrs case SCTP_PACKET_DROPPED: 4263163953Srrs#ifdef SCTP_DEBUG 4264163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4265163953Srrs printf("SCTP_PACKET_DROPPED\n"); 4266163953Srrs } 4267163953Srrs#endif /* SCTP_DEBUG */ 4268163953Srrs /* re-get it all please */ 4269163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4270163953Srrs chk_length, chunk_buf); 4271163953Srrs 4272163953Srrs sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch, 4273163953Srrs stcb, *netp); 4274163953Srrs 4275163953Srrs break; 4276163953Srrs 4277163953Srrs case SCTP_AUTHENTICATION: 4278163953Srrs#ifdef SCTP_DEBUG 4279163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4280163953Srrs printf("SCTP_AUTHENTICATION\n"); 4281163953Srrs } 4282163953Srrs#endif /* SCTP_DEBUG */ 4283163953Srrs if (sctp_auth_disable) 4284163953Srrs goto unknown_chunk; 4285163953Srrs 4286163953Srrs if (stcb == NULL) { 4287163953Srrs /* save the first AUTH for later processing */ 4288163953Srrs if (auth_skipped == 0) { 4289163953Srrs auth_offset = *offset; 4290163953Srrs auth_len = chk_length; 4291163953Srrs auth_skipped = 1; 4292163953Srrs } 4293163953Srrs /* skip this chunk (temporarily) */ 4294163953Srrs goto next_chunk; 4295163953Srrs } 4296163953Srrs if (got_auth == 1) { 4297163953Srrs /* skip this chunk... it's already auth'd */ 4298163953Srrs goto next_chunk; 4299163953Srrs } 4300163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4301163953Srrs chk_length, chunk_buf); 4302163953Srrs got_auth = 1; 4303163953Srrs if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, 4304163953Srrs m, *offset)) { 4305163953Srrs /* auth HMAC failed so dump the packet */ 4306163953Srrs *offset = length; 4307163953Srrs return (stcb); 4308163953Srrs } else { 4309163953Srrs /* remaining chunks are HMAC checked */ 4310163953Srrs stcb->asoc.authenticated = 1; 4311163953Srrs } 4312163953Srrs break; 4313163953Srrs 4314163953Srrs default: 4315163953Srrs unknown_chunk: 4316163953Srrs /* it's an unknown chunk! */ 4317163953Srrs if ((ch->chunk_type & 0x40) && (stcb != NULL)) { 4318163953Srrs struct mbuf *mm; 4319163953Srrs struct sctp_paramhdr *phd; 4320163953Srrs 4321163953Srrs mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 4322165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 4323163953Srrs if (mm) { 4324163953Srrs phd = mtod(mm, struct sctp_paramhdr *); 4325163953Srrs /* 4326163953Srrs * We cheat and use param type since 4327163953Srrs * we did not bother to define a 4328163953Srrs * error cause struct. They are the 4329163953Srrs * same basic format with different 4330163953Srrs * names. 4331163953Srrs */ 4332163953Srrs phd->param_type = htons(SCTP_CAUSE_UNRECOG_CHUNK); 4333163953Srrs phd->param_length = htons(chk_length + sizeof(*phd)); 4334165647Srrs SCTP_BUF_LEN(mm) = sizeof(*phd); 4335166023Srrs SCTP_BUF_NEXT(mm) = SCTP_M_COPYM(m, *offset, SCTP_SIZE32(chk_length), 4336163953Srrs M_DONTWAIT); 4337165647Srrs if (SCTP_BUF_NEXT(mm)) { 4338163953Srrs sctp_queue_op_err(stcb, mm); 4339163953Srrs } else { 4340163953Srrs sctp_m_freem(mm); 4341163953Srrs } 4342163953Srrs } 4343163953Srrs } 4344163953Srrs if ((ch->chunk_type & 0x80) == 0) { 4345163953Srrs /* discard this packet */ 4346163953Srrs *offset = length; 4347163953Srrs return (stcb); 4348163953Srrs } /* else skip this bad chunk and continue... */ 4349163953Srrs break; 4350163953Srrs } /* switch (ch->chunk_type) */ 4351163953Srrs 4352163953Srrs 4353163953Srrsnext_chunk: 4354163953Srrs /* get the next chunk */ 4355163953Srrs *offset += SCTP_SIZE32(chk_length); 4356163953Srrs if (*offset >= length) { 4357163953Srrs /* no more data left in the mbuf chain */ 4358163953Srrs break; 4359163953Srrs } 4360163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4361163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 4362163953Srrs if (ch == NULL) { 4363163953Srrs if (locked_tcb) 4364163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4365163953Srrs *offset = length; 4366163953Srrs return (NULL); 4367163953Srrs } 4368163953Srrs } /* while */ 4369163953Srrs return (stcb); 4370163953Srrs} 4371163953Srrs 4372163953Srrs 4373163953Srrs/* 4374163953Srrs * Process the ECN bits we have something set so we must look to see if it is 4375163953Srrs * ECN(0) or ECN(1) or CE 4376163953Srrs */ 4377163953Srrsstatic __inline void 4378163953Srrssctp_process_ecn_marked_a(struct sctp_tcb *stcb, struct sctp_nets *net, 4379163953Srrs uint8_t ecn_bits) 4380163953Srrs{ 4381163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4382163953Srrs ; 4383163953Srrs } else if ((ecn_bits & SCTP_ECT1_BIT) == SCTP_ECT1_BIT) { 4384163953Srrs /* 4385163953Srrs * we only add to the nonce sum for ECT1, ECT0 does not 4386163953Srrs * change the NS bit (that we have yet to find a way to send 4387163953Srrs * it yet). 4388163953Srrs */ 4389163953Srrs 4390163953Srrs /* ECN Nonce stuff */ 4391163953Srrs stcb->asoc.receiver_nonce_sum++; 4392163953Srrs stcb->asoc.receiver_nonce_sum &= SCTP_SACK_NONCE_SUM; 4393163953Srrs 4394163953Srrs /* 4395163953Srrs * Drag up the last_echo point if cumack is larger since we 4396163953Srrs * don't want the point falling way behind by more than 4397163953Srrs * 2^^31 and then having it be incorrect. 4398163953Srrs */ 4399163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4400163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4401163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4402163953Srrs } 4403163953Srrs } else if ((ecn_bits & SCTP_ECT0_BIT) == SCTP_ECT0_BIT) { 4404163953Srrs /* 4405163953Srrs * Drag up the last_echo point if cumack is larger since we 4406163953Srrs * don't want the point falling way behind by more than 4407163953Srrs * 2^^31 and then having it be incorrect. 4408163953Srrs */ 4409163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4410163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4411163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4412163953Srrs } 4413163953Srrs } 4414163953Srrs} 4415163953Srrs 4416163953Srrsstatic __inline void 4417163953Srrssctp_process_ecn_marked_b(struct sctp_tcb *stcb, struct sctp_nets *net, 4418163953Srrs uint32_t high_tsn, uint8_t ecn_bits) 4419163953Srrs{ 4420163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4421163953Srrs /* 4422163953Srrs * we possibly must notify the sender that a congestion 4423163953Srrs * window reduction is in order. We do this by adding a ECNE 4424163953Srrs * chunk to the output chunk queue. The incoming CWR will 4425163953Srrs * remove this chunk. 4426163953Srrs */ 4427163953Srrs if (compare_with_wrap(high_tsn, stcb->asoc.last_echo_tsn, 4428163953Srrs MAX_TSN)) { 4429163953Srrs /* Yep, we need to add a ECNE */ 4430163953Srrs sctp_send_ecn_echo(stcb, net, high_tsn); 4431163953Srrs stcb->asoc.last_echo_tsn = high_tsn; 4432163953Srrs } 4433163953Srrs } 4434163953Srrs} 4435163953Srrs 4436163953Srrs/* 4437163953Srrs * common input chunk processing (v4 and v6) 4438163953Srrs */ 4439163953Srrsint 4440163953Srrssctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, 4441163953Srrs int length, struct sctphdr *sh, struct sctp_chunkhdr *ch, 4442163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 4443163953Srrs uint8_t ecn_bits) 4444163953Srrs{ 4445163953Srrs /* 4446163953Srrs * Control chunk processing 4447163953Srrs */ 4448163953Srrs uint32_t high_tsn; 4449163953Srrs int fwd_tsn_seen = 0, data_processed = 0; 4450163953Srrs struct mbuf *m = *mm; 4451163953Srrs int abort_flag = 0; 4452163953Srrs int un_sent; 4453163953Srrs 4454163953Srrs SCTP_STAT_INCR(sctps_recvdatagrams); 4455163953Srrs#ifdef SCTP_AUDITING_ENABLED 4456163953Srrs sctp_audit_log(0xE0, 1); 4457163953Srrs sctp_auditing(0, inp, stcb, net); 4458163953Srrs#endif 4459163953Srrs 4460163953Srrs#ifdef SCTP_DEBUG 4461163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4462163996Srrs printf("Ok, Common input processing called, m:%p iphlen:%d offset:%d\n", 4463163996Srrs m, iphlen, offset); 4464163953Srrs } 4465163953Srrs#endif /* SCTP_DEBUG */ 4466163953Srrs 4467163953Srrs if (stcb) { 4468163953Srrs /* always clear this before beginning a packet */ 4469163953Srrs stcb->asoc.authenticated = 0; 4470163953Srrs stcb->asoc.seen_a_sack_this_pkt = 0; 4471163953Srrs } 4472163953Srrs if (IS_SCTP_CONTROL(ch)) { 4473163953Srrs /* process the control portion of the SCTP packet */ 4474163953Srrs stcb = sctp_process_control(m, iphlen, &offset, length, sh, ch, 4475163953Srrs inp, stcb, &net, &fwd_tsn_seen); 4476163953Srrs if (stcb) { 4477163953Srrs /* 4478163953Srrs * This covers us if the cookie-echo was there and 4479163953Srrs * it changes our INP. 4480163953Srrs */ 4481163953Srrs inp = stcb->sctp_ep; 4482163953Srrs } 4483163953Srrs } else { 4484163953Srrs /* 4485163953Srrs * no control chunks, so pre-process DATA chunks (these 4486163953Srrs * checks are taken care of by control processing) 4487163953Srrs */ 4488163953Srrs 4489163953Srrs /* 4490163953Srrs * if DATA only packet, and auth is required, then punt... 4491163953Srrs * can't have authenticated without any AUTH (control) 4492163953Srrs * chunks 4493163953Srrs */ 4494163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 4495163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4496163953Srrs stcb->asoc.local_auth_chunks)) { 4497163953Srrs /* "silently" ignore */ 4498163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4499163953Srrs SCTP_TCB_UNLOCK(stcb); 4500163953Srrs return (1); 4501163953Srrs } 4502163953Srrs if (stcb == NULL) { 4503163953Srrs /* out of the blue DATA chunk */ 4504163953Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL); 4505163953Srrs return (1); 4506163953Srrs } 4507163953Srrs if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) { 4508163953Srrs /* v_tag mismatch! */ 4509163953Srrs SCTP_STAT_INCR(sctps_badvtag); 4510163953Srrs SCTP_TCB_UNLOCK(stcb); 4511163953Srrs return (1); 4512163953Srrs } 4513163953Srrs } 4514163953Srrs 4515163953Srrs if (stcb == NULL) { 4516163953Srrs /* 4517163953Srrs * no valid TCB for this packet, or we found it's a bad 4518163953Srrs * packet while processing control, or we're done with this 4519163953Srrs * packet (done or skip rest of data), so we drop it... 4520163953Srrs */ 4521163953Srrs return (1); 4522163953Srrs } 4523163953Srrs /* 4524163953Srrs * DATA chunk processing 4525163953Srrs */ 4526163953Srrs /* plow through the data chunks while length > offset */ 4527163953Srrs 4528163953Srrs /* 4529163953Srrs * Rest should be DATA only. Check authentication state if AUTH for 4530163953Srrs * DATA is required. 4531163953Srrs */ 4532165220Srrs if ((length > offset) && (stcb != NULL) && !sctp_auth_disable && 4533163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4534163953Srrs stcb->asoc.local_auth_chunks) && 4535163953Srrs !stcb->asoc.authenticated) { 4536163953Srrs /* "silently" ignore */ 4537163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4538163953Srrs#ifdef SCTP_DEBUG 4539163953Srrs if (sctp_debug_on & SCTP_DEBUG_AUTH1) 4540163953Srrs printf("Data chunk requires AUTH, skipped\n"); 4541163953Srrs#endif 4542165220Srrs goto trigger_send; 4543163953Srrs } 4544163953Srrs if (length > offset) { 4545163953Srrs int retval; 4546163953Srrs 4547163953Srrs /* 4548163953Srrs * First check to make sure our state is correct. We would 4549163953Srrs * not get here unless we really did have a tag, so we don't 4550163953Srrs * abort if this happens, just dump the chunk silently. 4551163953Srrs */ 4552163953Srrs switch (SCTP_GET_STATE(&stcb->asoc)) { 4553163953Srrs case SCTP_STATE_COOKIE_ECHOED: 4554163953Srrs /* 4555163953Srrs * we consider data with valid tags in this state 4556163953Srrs * shows us the cookie-ack was lost. Imply it was 4557163953Srrs * there. 4558163953Srrs */ 4559163953Srrs stcb->asoc.overall_error_count = 0; 4560163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net); 4561163953Srrs break; 4562163953Srrs case SCTP_STATE_COOKIE_WAIT: 4563163953Srrs /* 4564163953Srrs * We consider OOTB any data sent during asoc setup. 4565163953Srrs */ 4566163953Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL); 4567163953Srrs SCTP_TCB_UNLOCK(stcb); 4568163953Srrs return (1); 4569163953Srrs break; 4570163953Srrs case SCTP_STATE_EMPTY: /* should not happen */ 4571163953Srrs case SCTP_STATE_INUSE: /* should not happen */ 4572163953Srrs case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */ 4573163953Srrs case SCTP_STATE_SHUTDOWN_ACK_SENT: 4574163953Srrs default: 4575163953Srrs SCTP_TCB_UNLOCK(stcb); 4576163953Srrs return (1); 4577163953Srrs break; 4578163953Srrs case SCTP_STATE_OPEN: 4579163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 4580163953Srrs break; 4581163953Srrs } 4582163953Srrs /* take care of ECN, part 1. */ 4583163953Srrs if (stcb->asoc.ecn_allowed && 4584163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4585163953Srrs sctp_process_ecn_marked_a(stcb, net, ecn_bits); 4586163953Srrs } 4587163953Srrs /* plow through the data chunks while length > offset */ 4588163953Srrs retval = sctp_process_data(mm, iphlen, &offset, length, sh, 4589163953Srrs inp, stcb, net, &high_tsn); 4590163953Srrs if (retval == 2) { 4591163953Srrs /* 4592163953Srrs * The association aborted, NO UNLOCK needed since 4593163953Srrs * the association is destroyed. 4594163953Srrs */ 4595163953Srrs return (0); 4596163953Srrs } 4597163953Srrs data_processed = 1; 4598163953Srrs if (retval == 0) { 4599163953Srrs /* take care of ecn part 2. */ 4600163953Srrs if (stcb->asoc.ecn_allowed && 4601163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4602163953Srrs sctp_process_ecn_marked_b(stcb, net, high_tsn, 4603163953Srrs ecn_bits); 4604163953Srrs } 4605163953Srrs } 4606163953Srrs /* 4607163953Srrs * Anything important needs to have been m_copy'ed in 4608163953Srrs * process_data 4609163953Srrs */ 4610163953Srrs } 4611163953Srrs if ((data_processed == 0) && (fwd_tsn_seen)) { 4612163953Srrs int was_a_gap = 0; 4613163953Srrs 4614163953Srrs if (compare_with_wrap(stcb->asoc.highest_tsn_inside_map, 4615163953Srrs stcb->asoc.cumulative_tsn, MAX_TSN)) { 4616163953Srrs /* there was a gap before this data was processed */ 4617163953Srrs was_a_gap = 1; 4618163953Srrs } 4619163953Srrs sctp_sack_check(stcb, 1, was_a_gap, &abort_flag); 4620163953Srrs if (abort_flag) { 4621163953Srrs /* Again, we aborted so NO UNLOCK needed */ 4622163953Srrs return (0); 4623163953Srrs } 4624163953Srrs } 4625163953Srrs /* trigger send of any chunks in queue... */ 4626165220Srrstrigger_send: 4627163953Srrs#ifdef SCTP_AUDITING_ENABLED 4628163953Srrs sctp_audit_log(0xE0, 2); 4629163953Srrs sctp_auditing(1, inp, stcb, net); 4630163953Srrs#endif 4631163953Srrs#ifdef SCTP_DEBUG 4632163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4633163953Srrs printf("Check for chunk output prw:%d tqe:%d tf=%d\n", 4634163953Srrs stcb->asoc.peers_rwnd, 4635163953Srrs TAILQ_EMPTY(&stcb->asoc.control_send_queue), 4636163953Srrs stcb->asoc.total_flight); 4637163953Srrs } 4638163953Srrs#endif 4639163953Srrs un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 4640163953Srrs 4641163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue) || 4642163953Srrs ((un_sent) && 4643163953Srrs (stcb->asoc.peers_rwnd > 0 || 4644163953Srrs (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) { 4645163953Srrs#ifdef SCTP_DEBUG 4646163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4647163953Srrs printf("Calling chunk OUTPUT\n"); 4648163953Srrs } 4649163953Srrs#endif 4650163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 4651163953Srrs#ifdef SCTP_DEBUG 4652163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4653163953Srrs printf("chunk OUTPUT returns\n"); 4654163953Srrs } 4655163953Srrs#endif 4656163953Srrs } 4657163953Srrs#ifdef SCTP_AUDITING_ENABLED 4658163953Srrs sctp_audit_log(0xE0, 3); 4659163953Srrs sctp_auditing(2, inp, stcb, net); 4660163953Srrs#endif 4661163953Srrs SCTP_TCB_UNLOCK(stcb); 4662163953Srrs return (0); 4663163953Srrs} 4664163953Srrs 4665163953Srrsextern int sctp_no_csum_on_loopback; 4666163953Srrs 4667163953Srrs 4668165220Srrsint sctp_buf_index = 0; 4669165220Srrsuint8_t sctp_list_of_chunks[30000]; 4670165220Srrs 4671165220Srrs 4672163953Srrsvoid 4673165647Srrssctp_input(i_pak, off) 4674165647Srrs struct mbuf *i_pak; 4675163953Srrs int off; 4676163953Srrs 4677163953Srrs{ 4678163953Srrs#ifdef SCTP_MBUF_LOGGING 4679163953Srrs struct mbuf *mat; 4680163953Srrs 4681163953Srrs#endif 4682165647Srrs struct mbuf *m; 4683163953Srrs int iphlen; 4684163953Srrs uint8_t ecn_bits; 4685163953Srrs struct ip *ip; 4686163953Srrs struct sctphdr *sh; 4687163953Srrs struct sctp_inpcb *inp = NULL; 4688163953Srrs 4689163953Srrs uint32_t check, calc_check; 4690163953Srrs struct sctp_nets *net; 4691163953Srrs struct sctp_tcb *stcb = NULL; 4692163953Srrs struct sctp_chunkhdr *ch; 4693163953Srrs int refcount_up = 0; 4694163953Srrs int length, mlen, offset; 4695163953Srrs 4696163953Srrs 4697163953Srrs iphlen = off; 4698165647Srrs m = SCTP_HEADER_TO_CHAIN(i_pak); 4699163953Srrs net = NULL; 4700163953Srrs SCTP_STAT_INCR(sctps_recvpackets); 4701163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 4702163953Srrs 4703163953Srrs /* 4704163953Srrs * Strip IP options, we don't allow any in or out. 4705163953Srrs */ 4706163953Srrs#ifdef SCTP_MBUF_LOGGING 4707163953Srrs /* Log in any input mbufs */ 4708163953Srrs mat = m; 4709163953Srrs while (mat) { 4710165647Srrs if (SCTP_BUF_IS_EXTENDED(mat)) { 4711163953Srrs sctp_log_mb(mat, SCTP_MBUF_INPUT); 4712163953Srrs } 4713165647Srrs mat = SCTP_BUF_NEXT(mat); 4714163953Srrs } 4715163953Srrs#endif 4716163953Srrs if ((size_t)iphlen > sizeof(struct ip)) { 4717163953Srrs ip_stripoptions(m, (struct mbuf *)0); 4718163953Srrs iphlen = sizeof(struct ip); 4719163953Srrs } 4720163953Srrs /* 4721163953Srrs * Get IP, SCTP, and first chunk header together in first mbuf. 4722163953Srrs */ 4723163953Srrs ip = mtod(m, struct ip *); 4724163953Srrs offset = iphlen + sizeof(*sh) + sizeof(*ch); 4725165647Srrs if (SCTP_BUF_LEN(m) < offset) { 4726163953Srrs if ((m = m_pullup(m, offset)) == 0) { 4727163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4728163953Srrs return; 4729163953Srrs } 4730163953Srrs ip = mtod(m, struct ip *); 4731163953Srrs } 4732163953Srrs sh = (struct sctphdr *)((caddr_t)ip + iphlen); 4733163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(*sh)); 4734163953Srrs 4735163953Srrs /* SCTP does not allow broadcasts or multicasts */ 4736163953Srrs if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { 4737163953Srrs goto bad; 4738163953Srrs } 4739163953Srrs if (((ch->chunk_type == SCTP_INITIATION) || 4740163953Srrs (ch->chunk_type == SCTP_INITIATION_ACK) || 4741163953Srrs (ch->chunk_type == SCTP_COOKIE_ECHO)) && 4742165647Srrs (SCTP_IS_IT_BROADCAST(ip->ip_dst, i_pak))) { 4743163953Srrs /* 4744163953Srrs * We only look at broadcast if its a front state, All 4745163953Srrs * others we will not have a tcb for anyway. 4746163953Srrs */ 4747163953Srrs goto bad; 4748163953Srrs } 4749163953Srrs /* destination port of 0 is illegal, based on RFC2960. */ 4750163953Srrs if (sh->dest_port == 0) { 4751163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4752163953Srrs goto bad; 4753163953Srrs } 4754163953Srrs /* validate SCTP checksum */ 4755166023Srrs if ((sctp_no_csum_on_loopback == 0) || !SCTP_IS_IT_LOOPBACK(i_pak)) { 4756163953Srrs /* 4757163953Srrs * we do NOT validate things from the loopback if the sysctl 4758163953Srrs * is set to 1. 4759163953Srrs */ 4760163953Srrs check = sh->checksum; /* save incoming checksum */ 4761163953Srrs if ((check == 0) && (sctp_no_csum_on_loopback)) { 4762163953Srrs /* 4763163953Srrs * special hook for where we got a local address 4764163953Srrs * somehow routed across a non IFT_LOOP type 4765163953Srrs * interface 4766163953Srrs */ 4767163953Srrs if (ip->ip_src.s_addr == ip->ip_dst.s_addr) 4768163953Srrs goto sctp_skip_csum_4; 4769163953Srrs } 4770163953Srrs sh->checksum = 0; /* prepare for calc */ 4771163953Srrs calc_check = sctp_calculate_sum(m, &mlen, iphlen); 4772163953Srrs if (calc_check != check) { 4773163953Srrs#ifdef SCTP_DEBUG 4774163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4775163996Srrs printf("Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 4776163996Srrs calc_check, check, m, mlen, iphlen); 4777163953Srrs } 4778163953Srrs#endif 4779163953Srrs 4780163953Srrs stcb = sctp_findassociation_addr(m, iphlen, 4781163953Srrs offset - sizeof(*ch), 4782163953Srrs sh, ch, &inp, &net); 4783163953Srrs if ((inp) && (stcb)) { 4784163953Srrs sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 4785163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR); 4786163953Srrs } else if ((inp != NULL) && (stcb == NULL)) { 4787163953Srrs refcount_up = 1; 4788163953Srrs } 4789163953Srrs SCTP_STAT_INCR(sctps_badsum); 4790163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 4791163953Srrs goto bad; 4792163953Srrs } 4793163953Srrs sh->checksum = calc_check; 4794163953Srrs } else { 4795163953Srrssctp_skip_csum_4: 4796165647Srrs mlen = SCTP_HEADER_LEN(i_pak); 4797163953Srrs } 4798163953Srrs /* validate mbuf chain length with IP payload length */ 4799163953Srrs if (mlen < (ip->ip_len - iphlen)) { 4800163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4801163953Srrs goto bad; 4802165220Srrs } { 4803165220Srrs /* TEMP log the first chunk */ 4804165220Srrs int x; 4805165220Srrs 4806165220Srrs x = atomic_fetchadd_int(&sctp_buf_index, 1); 4807166023Srrs if (x >= 30000) { 4808165220Srrs sctp_buf_index = 1; 4809165220Srrs x = 0;; 4810165220Srrs } 4811165220Srrs sctp_list_of_chunks[x] = ch->chunk_type; 4812163953Srrs } 4813163953Srrs /* 4814163953Srrs * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 4815163953Srrs * IP/SCTP/first chunk header... 4816163953Srrs */ 4817163953Srrs stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 4818163953Srrs sh, ch, &inp, &net); 4819163953Srrs /* inp's ref-count increased && stcb locked */ 4820163953Srrs if (inp == NULL) { 4821163953Srrs struct sctp_init_chunk *init_chk, chunk_buf; 4822163953Srrs 4823163953Srrs SCTP_STAT_INCR(sctps_noport); 4824163953Srrs#ifdef ICMP_BANDLIM 4825163953Srrs /* 4826163953Srrs * we use the bandwidth limiting to protect against sending 4827163953Srrs * too many ABORTS all at once. In this case these count the 4828163953Srrs * same as an ICMP message. 4829163953Srrs */ 4830163953Srrs if (badport_bandlim(0) < 0) 4831163953Srrs goto bad; 4832163953Srrs#endif /* ICMP_BANDLIM */ 4833163953Srrs#ifdef SCTP_DEBUG 4834163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4835163953Srrs printf("Sending a ABORT from packet entry!\n"); 4836163953Srrs } 4837163953Srrs#endif 4838163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 4839163953Srrs /* 4840163953Srrs * we do a trick here to get the INIT tag, dig in 4841163953Srrs * and get the tag from the INIT and put it in the 4842163953Srrs * common header. 4843163953Srrs */ 4844163953Srrs init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 4845163953Srrs iphlen + sizeof(*sh), sizeof(*init_chk), 4846163953Srrs (uint8_t *) & chunk_buf); 4847163953Srrs if (init_chk != NULL) 4848163953Srrs sh->v_tag = init_chk->init.initiate_tag; 4849163953Srrs } 4850165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 4851165220Srrs sctp_send_shutdown_complete2(m, iphlen, sh); 4852165220Srrs goto bad; 4853165220Srrs } 4854165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 4855165220Srrs goto bad; 4856165220Srrs } 4857165220Srrs if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 4858165220Srrs sctp_send_abort(m, iphlen, sh, 0, NULL); 4859163953Srrs goto bad; 4860163953Srrs } else if (stcb == NULL) { 4861163953Srrs refcount_up = 1; 4862163953Srrs } 4863163953Srrs#ifdef IPSEC 4864163953Srrs /* 4865163953Srrs * I very much doubt any of the IPSEC stuff will work but I have no 4866163953Srrs * idea, so I will leave it in place. 4867163953Srrs */ 4868163953Srrs 4869163996Srrs if (inp && ipsec4_in_reject(m, &inp->ip_inp.inp)) { 4870163953Srrs ipsecstat.in_polvio++; 4871163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4872163953Srrs goto bad; 4873163953Srrs } 4874163953Srrs#endif /* IPSEC */ 4875163953Srrs 4876163953Srrs 4877163953Srrs 4878163953Srrs /* 4879163953Srrs * common chunk processing 4880163953Srrs */ 4881163953Srrs length = ip->ip_len + iphlen; 4882163953Srrs offset -= sizeof(struct sctp_chunkhdr); 4883163953Srrs 4884163953Srrs ecn_bits = ip->ip_tos; 4885163953Srrs 4886163953Srrs sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 4887163953Srrs inp, stcb, net, ecn_bits); 4888163953Srrs /* inp's ref-count reduced && stcb unlocked */ 4889163953Srrs if (m) { 4890163953Srrs sctp_m_freem(m); 4891163953Srrs } 4892163953Srrs if ((inp) && (refcount_up)) { 4893163953Srrs /* reduce ref-count */ 4894163953Srrs SCTP_INP_WLOCK(inp); 4895163953Srrs SCTP_INP_DECR_REF(inp); 4896163953Srrs SCTP_INP_WUNLOCK(inp); 4897163953Srrs } 4898163953Srrs return; 4899163953Srrsbad: 4900163953Srrs if (stcb) 4901163953Srrs SCTP_TCB_UNLOCK(stcb); 4902163953Srrs 4903163953Srrs if ((inp) && (refcount_up)) { 4904163953Srrs /* reduce ref-count */ 4905163953Srrs SCTP_INP_WLOCK(inp); 4906163953Srrs SCTP_INP_DECR_REF(inp); 4907163953Srrs SCTP_INP_WUNLOCK(inp); 4908163953Srrs } 4909163953Srrs if (m) { 4910163953Srrs sctp_m_freem(m); 4911163953Srrs } 4912163953Srrs return; 4913163953Srrs} 4914