sctp_input.c revision 164085
1163953Srrs/*- 2163953Srrs * Copyright (c) 2001-2006, Cisco Systems, Inc. All rights reserved. 3163953Srrs * 4163953Srrs * Redistribution and use in source and binary forms, with or without 5163953Srrs * modification, are permitted provided that the following conditions are met: 6163953Srrs * 7163953Srrs * a) Redistributions of source code must retain the above copyright notice, 8163953Srrs * this list of conditions and the following disclaimer. 9163953Srrs * 10163953Srrs * b) Redistributions in binary form must reproduce the above copyright 11163953Srrs * notice, this list of conditions and the following disclaimer in 12163953Srrs * the documentation and/or other materials provided with the distribution. 13163953Srrs * 14163953Srrs * c) Neither the name of Cisco Systems, Inc. nor the names of its 15163953Srrs * contributors may be used to endorse or promote products derived 16163953Srrs * from this software without specific prior written permission. 17163953Srrs * 18163953Srrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19163953Srrs * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20163953Srrs * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21163953Srrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22163953Srrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23163953Srrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24163953Srrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25163953Srrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26163953Srrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27163953Srrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28163953Srrs * THE POSSIBILITY OF SUCH DAMAGE. 29163953Srrs */ 30163953Srrs 31163953Srrs/* $KAME: sctp_input.c,v 1.27 2005/03/06 16:04:17 itojun Exp $ */ 32163953Srrs 33163953Srrs#include <sys/cdefs.h> 34163953Srrs__FBSDID("$FreeBSD: head/sys/netinet/sctp_input.c 164085 2006-11-08 00:21:13Z rrs $"); 35163953Srrs 36163953Srrs#include "opt_ipsec.h" 37163953Srrs#include "opt_compat.h" 38163953Srrs#include "opt_inet6.h" 39163953Srrs#include "opt_inet.h" 40163953Srrs#include "opt_sctp.h" 41163953Srrs 42163953Srrs#include <sys/param.h> 43163953Srrs#include <sys/systm.h> 44163953Srrs#include <sys/malloc.h> 45163953Srrs#include <sys/mbuf.h> 46163953Srrs#include <sys/socket.h> 47163953Srrs#include <sys/socketvar.h> 48163953Srrs#include <sys/sysctl.h> 49163953Srrs#include <sys/domain.h> 50163953Srrs#include <sys/protosw.h> 51163953Srrs#include <sys/kernel.h> 52163953Srrs#include <sys/errno.h> 53163953Srrs#include <sys/syslog.h> 54163953Srrs 55163953Srrs#include <sys/limits.h> 56163953Srrs#include <machine/cpu.h> 57163953Srrs 58163953Srrs#include <net/if.h> 59163953Srrs#include <net/route.h> 60163953Srrs#include <net/if_types.h> 61163953Srrs 62163953Srrs#include <netinet/in.h> 63163953Srrs#include <netinet/in_systm.h> 64163953Srrs#include <netinet/ip.h> 65163953Srrs#include <netinet/in_pcb.h> 66163953Srrs#include <netinet/in_var.h> 67163953Srrs#include <netinet/ip_var.h> 68163953Srrs 69163953Srrs#ifdef INET6 70163953Srrs#include <netinet/ip6.h> 71163953Srrs#include <netinet6/ip6_var.h> 72163953Srrs#endif /* INET6 */ 73163953Srrs 74163953Srrs#include <netinet/ip_icmp.h> 75163953Srrs#include <netinet/icmp_var.h> 76163953Srrs 77163953Srrs#include <netinet/sctp_os.h> 78163953Srrs#include <netinet/sctp_var.h> 79163953Srrs#include <netinet/sctp_pcb.h> 80163953Srrs#include <netinet/sctp_header.h> 81163953Srrs#include <netinet/sctputil.h> 82163953Srrs#include <netinet/sctp_output.h> 83163953Srrs#include <netinet/sctp_input.h> 84163953Srrs#include <netinet/sctp_auth.h> 85163953Srrs#include <netinet/sctp_indata.h> 86163953Srrs#include <netinet/sctp_asconf.h> 87163953Srrs 88163953Srrs#include <netinet/ip_options.h> 89163953Srrs 90163953Srrs 91163953Srrs#ifdef IPSEC 92163953Srrs#include <netinet6/ipsec.h> 93163953Srrs#include <netkey/key.h> 94163953Srrs#endif /* IPSEC */ 95163953Srrs 96163953Srrs 97163953Srrs#ifdef SCTP_DEBUG 98163953Srrsextern uint32_t sctp_debug_on; 99163953Srrs 100163953Srrs#endif 101163953Srrs 102163953Srrs 103163953Srrsstatic void 104163953Srrssctp_stop_all_cookie_timers(struct sctp_tcb *stcb) 105163953Srrs{ 106163953Srrs struct sctp_nets *net; 107163953Srrs 108163953Srrs SCTP_TCB_LOCK_ASSERT(stcb); 109163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 110163953Srrs if ((callout_pending(&net->rxt_timer.timer)) && 111163953Srrs (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE)) { 112163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE, 113163953Srrs stcb->sctp_ep, 114163953Srrs stcb, 115163953Srrs net); 116163953Srrs } 117163953Srrs } 118163953Srrs} 119163953Srrs 120163953Srrs/* INIT handler */ 121163953Srrsstatic void 122163953Srrssctp_handle_init(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, 123163953Srrs struct sctp_init_chunk *cp, struct sctp_inpcb *inp, struct sctp_tcb *stcb, 124163953Srrs struct sctp_nets *net) 125163953Srrs{ 126163953Srrs struct sctp_init *init; 127163953Srrs struct mbuf *op_err; 128163953Srrs uint32_t init_limit; 129163953Srrs 130163953Srrs#ifdef SCTP_DEBUG 131163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 132163953Srrs printf("sctp_handle_init: handling INIT tcb:%p\n", stcb); 133163953Srrs } 134163953Srrs#endif 135163953Srrs op_err = NULL; 136163953Srrs init = &cp->init; 137163953Srrs /* First are we accepting? */ 138163953Srrs if ((inp->sctp_socket->so_qlimit == 0) && (stcb == NULL)) { 139163953Srrs#ifdef SCTP_DEBUG 140163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 141163953Srrs printf("sctp_handle_init: Abort, so_qlimit:%d\n", inp->sctp_socket->so_qlimit); 142163953Srrs } 143163953Srrs#endif 144163953Srrs /* 145163953Srrs * FIX ME ?? What about TCP model and we have a 146163953Srrs * match/restart case? 147163953Srrs */ 148163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 149163953Srrs return; 150163953Srrs } 151163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) { 152163953Srrs /* Invalid length */ 153163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 154163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 155163953Srrs return; 156163953Srrs } 157163953Srrs /* validate parameters */ 158163953Srrs if (init->initiate_tag == 0) { 159163953Srrs /* protocol error... send abort */ 160163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 161163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 162163953Srrs return; 163163953Srrs } 164163953Srrs if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) { 165163953Srrs /* invalid parameter... send abort */ 166163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 167163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 168163953Srrs return; 169163953Srrs } 170163953Srrs if (init->num_inbound_streams == 0) { 171163953Srrs /* protocol error... send abort */ 172163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 173163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 174163953Srrs return; 175163953Srrs } 176163953Srrs if (init->num_outbound_streams == 0) { 177163953Srrs /* protocol error... send abort */ 178163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 179163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err); 180163953Srrs return; 181163953Srrs } 182163953Srrs init_limit = offset + ntohs(cp->ch.chunk_length); 183163953Srrs if (sctp_validate_init_auth_params(m, offset + sizeof(*cp), 184163953Srrs init_limit)) { 185163953Srrs /* auth parameter(s) error... send abort */ 186163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, NULL); 187163953Srrs return; 188163953Srrs } 189163953Srrs /* send an INIT-ACK w/cookie */ 190163953Srrs#ifdef SCTP_DEBUG 191163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 192163953Srrs printf("sctp_handle_init: sending INIT-ACK\n"); 193163953Srrs } 194163953Srrs#endif 195163953Srrs sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, sh, cp); 196163953Srrs} 197163953Srrs 198163953Srrs/* 199163953Srrs * process peer "INIT/INIT-ACK" chunk returns value < 0 on error 200163953Srrs */ 201163953Srrsstatic int 202163953Srrssctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb, 203163953Srrs struct sctp_nets *net) 204163953Srrs{ 205163953Srrs struct sctp_init *init; 206163953Srrs struct sctp_association *asoc; 207163953Srrs struct sctp_nets *lnet; 208163953Srrs unsigned int i; 209163953Srrs 210163953Srrs init = &cp->init; 211163953Srrs asoc = &stcb->asoc; 212163953Srrs /* save off parameters */ 213163953Srrs asoc->peer_vtag = ntohl(init->initiate_tag); 214163953Srrs asoc->peers_rwnd = ntohl(init->a_rwnd); 215163953Srrs if (TAILQ_FIRST(&asoc->nets)) { 216163953Srrs /* update any ssthresh's that may have a default */ 217163953Srrs TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 218163953Srrs lnet->ssthresh = asoc->peers_rwnd; 219163953Srrs 220163953Srrs#if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING) 221163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION); 222163953Srrs#endif 223163953Srrs 224163953Srrs } 225163953Srrs } 226163953Srrs if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) { 227163953Srrs unsigned int newcnt; 228163953Srrs struct sctp_stream_out *outs; 229163953Srrs struct sctp_stream_queue_pending *sp; 230163953Srrs 231163953Srrs /* cut back on number of streams */ 232163953Srrs newcnt = ntohs(init->num_inbound_streams); 233163953Srrs /* This if is probably not needed but I am cautious */ 234163953Srrs if (asoc->strmout) { 235163953Srrs /* First make sure no data chunks are trapped */ 236163953Srrs for (i = newcnt; i < asoc->pre_open_streams; i++) { 237163953Srrs outs = &asoc->strmout[i]; 238163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 239163953Srrs while (sp) { 240163953Srrs TAILQ_REMOVE(&outs->outqueue, sp, 241163953Srrs next); 242163953Srrs asoc->stream_queue_cnt--; 243163953Srrs sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, 244163953Srrs stcb, SCTP_NOTIFY_DATAGRAM_UNSENT, 245163953Srrs sp); 246163953Srrs if (sp->data) { 247163953Srrs sctp_m_freem(sp->data); 248163953Srrs sp->data = NULL; 249163953Srrs } 250163953Srrs sctp_free_remote_addr(sp->net); 251163953Srrs sp->net = NULL; 252163953Srrs /* Free the chunk */ 253163964Srrs printf("sp:%p tcb:%p weird free case\n", 254163979Sru sp, stcb); 255163953Srrs 256163953Srrs sctp_free_a_strmoq(stcb, sp); 257163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 258163953Srrs } 259163953Srrs } 260163953Srrs } 261163953Srrs /* cut back the count and abandon the upper streams */ 262163953Srrs asoc->pre_open_streams = newcnt; 263163953Srrs } 264163953Srrs asoc->streamincnt = ntohs(init->num_outbound_streams); 265163953Srrs if (asoc->streamincnt > MAX_SCTP_STREAMS) { 266163953Srrs asoc->streamincnt = MAX_SCTP_STREAMS; 267163953Srrs } 268163953Srrs asoc->streamoutcnt = asoc->pre_open_streams; 269163953Srrs /* init tsn's */ 270163953Srrs asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1; 271163953Srrs#ifdef SCTP_MAP_LOGGING 272163953Srrs sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 273163953Srrs#endif 274163953Srrs /* This is the next one we expect */ 275163953Srrs asoc->str_reset_seq_in = asoc->asconf_seq_in + 1; 276163953Srrs 277163953Srrs asoc->mapping_array_base_tsn = ntohl(init->initial_tsn); 278163953Srrs asoc->cumulative_tsn = asoc->asconf_seq_in; 279163953Srrs asoc->last_echo_tsn = asoc->asconf_seq_in; 280163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 281163953Srrs /* open the requested streams */ 282163953Srrs if (asoc->strmin != NULL) { 283163953Srrs /* Free the old ones */ 284163953Srrs SCTP_FREE(asoc->strmin); 285163953Srrs } 286163953Srrs SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt * 287163953Srrs sizeof(struct sctp_stream_in), "StreamsIn"); 288163953Srrs if (asoc->strmin == NULL) { 289163953Srrs /* we didn't get memory for the streams! */ 290163953Srrs#ifdef SCTP_DEBUG 291163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 292163953Srrs printf("process_init: couldn't get memory for the streams!\n"); 293163953Srrs } 294163953Srrs#endif 295163953Srrs return (-1); 296163953Srrs } 297163953Srrs for (i = 0; i < asoc->streamincnt; i++) { 298163953Srrs asoc->strmin[i].stream_no = i; 299163953Srrs asoc->strmin[i].last_sequence_delivered = 0xffff; 300163953Srrs /* 301163953Srrs * U-stream ranges will be set when the cookie is unpacked. 302163953Srrs * Or for the INIT sender they are un set (if pr-sctp not 303163953Srrs * supported) when the INIT-ACK arrives. 304163953Srrs */ 305163953Srrs TAILQ_INIT(&asoc->strmin[i].inqueue); 306163953Srrs /* 307163953Srrs * we are not on any wheel, pr-sctp streams will go on the 308163953Srrs * wheel when they have data waiting for reorder. 309163953Srrs */ 310163953Srrs asoc->strmin[i].next_spoke.tqe_next = 0; 311163953Srrs asoc->strmin[i].next_spoke.tqe_prev = 0; 312163953Srrs } 313163953Srrs 314163953Srrs /* 315163953Srrs * load_address_from_init will put the addresses into the 316163953Srrs * association when the COOKIE is processed or the INIT-ACK is 317163953Srrs * processed. Both types of COOKIE's existing and new call this 318163953Srrs * routine. It will remove addresses that are no longer in the 319163953Srrs * association (for the restarting case where addresses are 320163953Srrs * removed). Up front when the INIT arrives we will discard it if it 321163953Srrs * is a restart and new addresses have been added. 322163953Srrs */ 323163953Srrs return (0); 324163953Srrs} 325163953Srrs 326163953Srrs/* 327163953Srrs * INIT-ACK message processing/consumption returns value < 0 on error 328163953Srrs */ 329163953Srrsstatic int 330163953Srrssctp_process_init_ack(struct mbuf *m, int iphlen, int offset, 331163953Srrs struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 332163953Srrs struct sctp_nets *net) 333163953Srrs{ 334163953Srrs struct sctp_association *asoc; 335163953Srrs struct mbuf *op_err; 336163953Srrs int retval, abort_flag; 337163953Srrs uint32_t initack_limit; 338163953Srrs 339163953Srrs /* First verify that we have no illegal param's */ 340163953Srrs abort_flag = 0; 341163953Srrs op_err = NULL; 342163953Srrs 343163953Srrs op_err = sctp_arethere_unrecognized_parameters(m, 344163953Srrs (offset + sizeof(struct sctp_init_chunk)), 345163953Srrs &abort_flag, (struct sctp_chunkhdr *)cp); 346163953Srrs if (abort_flag) { 347163953Srrs /* Send an abort and notify peer */ 348163953Srrs if (op_err != NULL) { 349163953Srrs sctp_send_operr_to(m, iphlen, op_err, cp->init.initiate_tag); 350163953Srrs } else { 351163953Srrs /* 352163953Srrs * Just notify (abort_assoc does this if we send an 353163953Srrs * abort). 354163953Srrs */ 355163953Srrs sctp_abort_notification(stcb, 0); 356163953Srrs /* 357163953Srrs * No sense in further INIT's since we will get the 358163953Srrs * same param back 359163953Srrs */ 360163953Srrs sctp_free_assoc(stcb->sctp_ep, stcb, 0); 361163953Srrs } 362163953Srrs return (-1); 363163953Srrs } 364163953Srrs asoc = &stcb->asoc; 365163953Srrs /* process the peer's parameters in the INIT-ACK */ 366163953Srrs retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb, net); 367163953Srrs if (retval < 0) { 368163953Srrs return (retval); 369163953Srrs } 370163953Srrs initack_limit = offset + ntohs(cp->ch.chunk_length); 371163953Srrs /* load all addresses */ 372163953Srrs if ((retval = sctp_load_addresses_from_init(stcb, m, iphlen, 373163953Srrs (offset + sizeof(struct sctp_init_chunk)), initack_limit, sh, 374163953Srrs NULL))) { 375163953Srrs /* Huh, we should abort */ 376163953Srrs#ifdef SCTP_DEBUG 377163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 378163953Srrs printf("Load addresses from INIT causes an abort %d\n", retval); 379163953Srrs } 380163953Srrs#endif 381163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 382163953Srrs NULL); 383163953Srrs return (-1); 384163953Srrs } 385163953Srrs stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs, 386163953Srrs stcb->asoc.local_hmacs); 387163953Srrs if (op_err) { 388163953Srrs sctp_queue_op_err(stcb, op_err); 389163953Srrs /* queuing will steal away the mbuf chain to the out queue */ 390163953Srrs op_err = NULL; 391163953Srrs } 392163953Srrs /* extract the cookie and queue it to "echo" it back... */ 393163953Srrs stcb->asoc.overall_error_count = 0; 394163953Srrs net->error_count = 0; 395163953Srrs 396163953Srrs /* 397163953Srrs * Cancel the INIT timer, We do this first before queueing the 398163953Srrs * cookie. We always cancel at the primary to assue that we are 399163953Srrs * canceling the timer started by the INIT which always goes to the 400163953Srrs * primary. 401163953Srrs */ 402163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb, 403163953Srrs asoc->primary_destination); 404163953Srrs 405163953Srrs retval = sctp_send_cookie_echo(m, offset, stcb, net); 406163953Srrs if (retval < 0) { 407163953Srrs /* 408163953Srrs * No cookie, we probably should send a op error. But in any 409163953Srrs * case if there is no cookie in the INIT-ACK, we can 410163953Srrs * abandon the peer, its broke. 411163953Srrs */ 412163953Srrs if (retval == -3) { 413163953Srrs /* We abort with an error of missing mandatory param */ 414163953Srrs struct mbuf *op_err; 415163953Srrs 416163953Srrs op_err = 417163953Srrs sctp_generate_invmanparam(SCTP_CAUSE_MISSING_PARAM); 418163953Srrs if (op_err) { 419163953Srrs /* 420163953Srrs * Expand beyond to include the mandatory 421163953Srrs * param cookie 422163953Srrs */ 423163953Srrs struct sctp_inv_mandatory_param *mp; 424163953Srrs 425163953Srrs op_err->m_len = 426163953Srrs sizeof(struct sctp_inv_mandatory_param); 427163953Srrs mp = mtod(op_err, 428163953Srrs struct sctp_inv_mandatory_param *); 429163953Srrs /* Subtract the reserved param */ 430163953Srrs mp->length = 431163953Srrs htons(sizeof(struct sctp_inv_mandatory_param) - 2); 432163953Srrs mp->num_param = htonl(1); 433163953Srrs mp->param = htons(SCTP_STATE_COOKIE); 434163953Srrs mp->resv = 0; 435163953Srrs } 436163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, 437163953Srrs sh, op_err); 438163953Srrs } 439163953Srrs return (retval); 440163953Srrs } 441163953Srrs /* calculate the RTO */ 442163953Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered); 443163953Srrs 444163953Srrs return (0); 445163953Srrs} 446163953Srrs 447163953Srrsstatic void 448163953Srrssctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp, 449163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 450163953Srrs{ 451163953Srrs struct sockaddr_storage store; 452163953Srrs struct sockaddr_in *sin; 453163953Srrs struct sockaddr_in6 *sin6; 454163953Srrs struct sctp_nets *r_net; 455163953Srrs struct timeval tv; 456163953Srrs 457163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) { 458163953Srrs /* Invalid length */ 459163953Srrs return; 460163953Srrs } 461163953Srrs sin = (struct sockaddr_in *)&store; 462163953Srrs sin6 = (struct sockaddr_in6 *)&store; 463163953Srrs 464163953Srrs memset(&store, 0, sizeof(store)); 465163953Srrs if (cp->heartbeat.hb_info.addr_family == AF_INET && 466163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) { 467163953Srrs sin->sin_family = cp->heartbeat.hb_info.addr_family; 468163953Srrs sin->sin_len = cp->heartbeat.hb_info.addr_len; 469163953Srrs sin->sin_port = stcb->rport; 470163953Srrs memcpy(&sin->sin_addr, cp->heartbeat.hb_info.address, 471163953Srrs sizeof(sin->sin_addr)); 472163953Srrs } else if (cp->heartbeat.hb_info.addr_family == AF_INET6 && 473163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) { 474163953Srrs sin6->sin6_family = cp->heartbeat.hb_info.addr_family; 475163953Srrs sin6->sin6_len = cp->heartbeat.hb_info.addr_len; 476163953Srrs sin6->sin6_port = stcb->rport; 477163953Srrs memcpy(&sin6->sin6_addr, cp->heartbeat.hb_info.address, 478163953Srrs sizeof(sin6->sin6_addr)); 479163953Srrs } else { 480163953Srrs return; 481163953Srrs } 482163953Srrs r_net = sctp_findnet(stcb, (struct sockaddr *)sin); 483163953Srrs if (r_net == NULL) { 484163953Srrs#ifdef SCTP_DEBUG 485163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 486163953Srrs printf("Huh? I can't find the address I sent it to, discard\n"); 487163953Srrs } 488163953Srrs#endif 489163953Srrs return; 490163953Srrs } 491163953Srrs if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) && 492163953Srrs (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) && 493163953Srrs (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) { 494163953Srrs /* 495163953Srrs * If the its a HB and it's random value is correct when can 496163953Srrs * confirm the destination. 497163953Srrs */ 498163953Srrs r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 499163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 500163953Srrs stcb, 0, (void *)r_net); 501163953Srrs } 502163953Srrs r_net->error_count = 0; 503163953Srrs r_net->hb_responded = 1; 504163953Srrs tv.tv_sec = cp->heartbeat.hb_info.time_value_1; 505163953Srrs tv.tv_usec = cp->heartbeat.hb_info.time_value_2; 506163953Srrs if (r_net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 507163953Srrs r_net->dest_state &= ~SCTP_ADDR_NOT_REACHABLE; 508163953Srrs r_net->dest_state |= SCTP_ADDR_REACHABLE; 509163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 510163953Srrs SCTP_HEARTBEAT_SUCCESS, (void *)r_net); 511163953Srrs /* now was it the primary? if so restore */ 512163953Srrs if (r_net->dest_state & SCTP_ADDR_WAS_PRIMARY) { 513163953Srrs sctp_set_primary_addr(stcb, (struct sockaddr *)NULL, r_net); 514163953Srrs } 515163953Srrs } 516163953Srrs /* Now lets do a RTO with this */ 517163953Srrs r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv); 518163953Srrs} 519163953Srrs 520163953Srrsstatic void 521163953Srrssctp_handle_abort(struct sctp_abort_chunk *cp, 522163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 523163953Srrs{ 524163953Srrs 525163953Srrs#ifdef SCTP_DEBUG 526163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 527163953Srrs printf("sctp_handle_abort: handling ABORT\n"); 528163953Srrs } 529163953Srrs#endif 530163953Srrs if (stcb == NULL) 531163953Srrs return; 532163953Srrs /* verify that the destination addr is in the association */ 533163953Srrs /* ignore abort for addresses being deleted */ 534163953Srrs 535163953Srrs /* stop any receive timers */ 536163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net); 537163953Srrs /* notify user of the abort and clean up... */ 538163953Srrs sctp_abort_notification(stcb, 0); 539163953Srrs /* free the tcb */ 540163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_aborted); 541163953Srrs if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 542163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 543163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 544163953Srrs } 545163953Srrs sctp_free_assoc(stcb->sctp_ep, stcb, 0); 546163953Srrs#ifdef SCTP_DEBUG 547163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 548163953Srrs printf("sctp_handle_abort: finished\n"); 549163953Srrs } 550163953Srrs#endif 551163953Srrs} 552163953Srrs 553163953Srrsstatic void 554163953Srrssctp_handle_shutdown(struct sctp_shutdown_chunk *cp, 555163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag) 556163953Srrs{ 557163953Srrs struct sctp_association *asoc; 558163953Srrs int some_on_streamwheel; 559163953Srrs 560163953Srrs#ifdef SCTP_DEBUG 561163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 562163953Srrs printf("sctp_handle_shutdown: handling SHUTDOWN\n"); 563163953Srrs } 564163953Srrs#endif 565163953Srrs if (stcb == NULL) 566163953Srrs return; 567163953Srrs 568163953Srrs if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) || 569163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 570163953Srrs return; 571163953Srrs } 572163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) { 573163953Srrs /* Shutdown NOT the expected size */ 574163953Srrs return; 575163953Srrs } else { 576163953Srrs sctp_update_acked(stcb, cp, net, abort_flag); 577163953Srrs } 578163953Srrs asoc = &stcb->asoc; 579163953Srrs if (stcb->asoc.control_pdapi) { 580163953Srrs /* 581163953Srrs * With a normal shutdown we assume the end of last record. 582163953Srrs */ 583163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 584163953Srrs stcb->asoc.control_pdapi->end_added = 1; 585164085Srrs stcb->asoc.control_pdapi->pdapi_aborted = 1; 586163953Srrs if (stcb->asoc.control_pdapi->tail_mbuf) { 587163953Srrs stcb->asoc.control_pdapi->tail_mbuf->m_flags |= M_EOR; 588163953Srrs } 589163953Srrs stcb->asoc.control_pdapi = NULL; 590163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 591163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 592163953Srrs } 593163953Srrs /* goto SHUTDOWN_RECEIVED state to block new requests */ 594163953Srrs if (stcb->sctp_socket) { 595163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 596163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) { 597163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_RECEIVED; 598163953Srrs /* 599163953Srrs * notify upper layer that peer has initiated a 600163953Srrs * shutdown 601163953Srrs */ 602163953Srrs sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL); 603163953Srrs 604163953Srrs /* reset time */ 605163953Srrs SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 606163953Srrs } 607163953Srrs } 608163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) { 609163953Srrs /* 610163953Srrs * stop the shutdown timer, since we WILL move to 611163953Srrs * SHUTDOWN-ACK-SENT. 612163953Srrs */ 613163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net); 614163953Srrs } 615163953Srrs /* Now are we there yet? */ 616163953Srrs some_on_streamwheel = 0; 617163953Srrs if (!TAILQ_EMPTY(&asoc->out_wheel)) { 618163953Srrs /* Check to see if some data queued */ 619163953Srrs struct sctp_stream_out *outs; 620163953Srrs 621163953Srrs TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) { 622163953Srrs if (!TAILQ_EMPTY(&outs->outqueue)) { 623163953Srrs some_on_streamwheel = 1; 624163953Srrs break; 625163953Srrs } 626163953Srrs } 627163953Srrs } 628163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 629163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 630163953Srrs some_on_streamwheel) { 631163953Srrs /* By returning we will push more data out */ 632163953Srrs return; 633163953Srrs } else { 634163953Srrs /* no outstanding data to send, so move on... */ 635163953Srrs /* send SHUTDOWN-ACK */ 636163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 637163953Srrs /* move to SHUTDOWN-ACK-SENT state */ 638163953Srrs if (asoc->state == SCTP_STATE_SHUTDOWN_RECEIVED) { 639163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 640163953Srrs } 641163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_ACK_SENT; 642163953Srrs 643163953Srrs /* start SHUTDOWN timer */ 644163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, 645163953Srrs stcb, net); 646163953Srrs } 647163953Srrs} 648163953Srrs 649163953Srrsstatic void 650163953Srrssctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp, 651163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 652163953Srrs{ 653163953Srrs struct sctp_association *asoc; 654163953Srrs 655163953Srrs#ifdef SCTP_DEBUG 656163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 657163953Srrs printf("sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n"); 658163953Srrs } 659163953Srrs#endif 660163953Srrs if (stcb == NULL) 661163953Srrs return; 662163953Srrs 663163953Srrs asoc = &stcb->asoc; 664163953Srrs /* process according to association state */ 665163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 666163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 667163953Srrs /* unexpected SHUTDOWN-ACK... so ignore... */ 668163953Srrs SCTP_TCB_UNLOCK(stcb); 669163953Srrs return; 670163953Srrs } 671163953Srrs if (stcb->asoc.control_pdapi) { 672163953Srrs /* 673163953Srrs * With a normal shutdown we assume the end of last record. 674163953Srrs */ 675163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 676163953Srrs stcb->asoc.control_pdapi->end_added = 1; 677164085Srrs stcb->asoc.control_pdapi->pdapi_aborted = 1; 678163953Srrs if (stcb->asoc.control_pdapi->tail_mbuf) { 679163953Srrs stcb->asoc.control_pdapi->tail_mbuf->m_flags |= M_EOR; 680163953Srrs } 681163953Srrs stcb->asoc.control_pdapi = NULL; 682163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 683163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 684163953Srrs } 685163953Srrs /* are the queues empty? */ 686163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 687163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 688163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 689163953Srrs sctp_report_all_outbound(stcb); 690163953Srrs } 691163953Srrs /* stop the timer */ 692163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net); 693163953Srrs /* send SHUTDOWN-COMPLETE */ 694163953Srrs sctp_send_shutdown_complete(stcb, net); 695163953Srrs /* notify upper layer protocol */ 696163953Srrs if (stcb->sctp_socket) { 697163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 698163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 699163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 700163953Srrs /* Set the connected flag to disconnected */ 701163953Srrs stcb->sctp_ep->sctp_socket->so_snd.sb_cc = 0; 702163953Srrs } 703163953Srrs } 704163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 705163953Srrs /* free the TCB but first save off the ep */ 706163953Srrs sctp_free_assoc(stcb->sctp_ep, stcb, 0); 707163953Srrs} 708163953Srrs 709163953Srrs/* 710163953Srrs * Skip past the param header and then we will find the chunk that caused the 711163953Srrs * problem. There are two possiblities ASCONF or FWD-TSN other than that and 712163953Srrs * our peer must be broken. 713163953Srrs */ 714163953Srrsstatic void 715163953Srrssctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr, 716163953Srrs struct sctp_nets *net) 717163953Srrs{ 718163953Srrs struct sctp_chunkhdr *chk; 719163953Srrs 720163953Srrs chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr)); 721163953Srrs switch (chk->chunk_type) { 722163953Srrs case SCTP_ASCONF_ACK: 723163953Srrs case SCTP_ASCONF: 724163953Srrs sctp_asconf_cleanup(stcb, net); 725163953Srrs break; 726163953Srrs case SCTP_FORWARD_CUM_TSN: 727163953Srrs stcb->asoc.peer_supports_prsctp = 0; 728163953Srrs break; 729163953Srrs default: 730163953Srrs#ifdef SCTP_DEBUG 731163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 732163953Srrs printf("Peer does not support chunk type %d(%x)??\n", 733163953Srrs chk->chunk_type, (uint32_t) chk->chunk_type); 734163953Srrs } 735163953Srrs#endif 736163953Srrs break; 737163953Srrs } 738163953Srrs} 739163953Srrs 740163953Srrs/* 741163953Srrs * Skip past the param header and then we will find the param that caused the 742163953Srrs * problem. There are a number of param's in a ASCONF OR the prsctp param 743163953Srrs * these will turn of specific features. 744163953Srrs */ 745163953Srrsstatic void 746163953Srrssctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr) 747163953Srrs{ 748163953Srrs struct sctp_paramhdr *pbad; 749163953Srrs 750163953Srrs pbad = phdr + 1; 751163953Srrs switch (ntohs(pbad->param_type)) { 752163953Srrs /* pr-sctp draft */ 753163953Srrs case SCTP_PRSCTP_SUPPORTED: 754163953Srrs stcb->asoc.peer_supports_prsctp = 0; 755163953Srrs break; 756163953Srrs case SCTP_SUPPORTED_CHUNK_EXT: 757163953Srrs break; 758163953Srrs /* draft-ietf-tsvwg-addip-sctp */ 759163953Srrs case SCTP_ECN_NONCE_SUPPORTED: 760163953Srrs stcb->asoc.peer_supports_ecn_nonce = 0; 761163953Srrs stcb->asoc.ecn_nonce_allowed = 0; 762163953Srrs stcb->asoc.ecn_allowed = 0; 763163953Srrs break; 764163953Srrs case SCTP_ADD_IP_ADDRESS: 765163953Srrs case SCTP_DEL_IP_ADDRESS: 766163953Srrs case SCTP_SET_PRIM_ADDR: 767163953Srrs stcb->asoc.peer_supports_asconf = 0; 768163953Srrs break; 769163953Srrs case SCTP_SUCCESS_REPORT: 770163953Srrs case SCTP_ERROR_CAUSE_IND: 771163953Srrs#ifdef SCTP_DEBUG 772163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 773163953Srrs printf("Huh, the peer does not support success? or error cause?\n"); 774163953Srrs printf("Turning off ASCONF to this strange peer\n"); 775163953Srrs } 776163953Srrs#endif 777163953Srrs stcb->asoc.peer_supports_asconf = 0; 778163953Srrs break; 779163953Srrs default: 780163953Srrs#ifdef SCTP_DEBUG 781163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 782163953Srrs printf("Peer does not support param type %d(%x)??\n", 783163953Srrs pbad->param_type, (uint32_t) pbad->param_type); 784163953Srrs } 785163953Srrs#endif 786163953Srrs break; 787163953Srrs } 788163953Srrs} 789163953Srrs 790163953Srrsstatic int 791163953Srrssctp_handle_error(struct sctp_chunkhdr *ch, 792163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 793163953Srrs{ 794163953Srrs int chklen; 795163953Srrs struct sctp_paramhdr *phdr; 796163953Srrs uint16_t error_type; 797163953Srrs uint16_t error_len; 798163953Srrs struct sctp_association *asoc; 799163953Srrs 800163953Srrs int adjust; 801163953Srrs 802163953Srrs /* parse through all of the errors and process */ 803163953Srrs asoc = &stcb->asoc; 804163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)ch + 805163953Srrs sizeof(struct sctp_chunkhdr)); 806163953Srrs chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr); 807163953Srrs while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) { 808163953Srrs /* Process an Error Cause */ 809163953Srrs error_type = ntohs(phdr->param_type); 810163953Srrs error_len = ntohs(phdr->param_length); 811163953Srrs if ((error_len > chklen) || (error_len == 0)) { 812163953Srrs /* invalid param length for this param */ 813163953Srrs#ifdef SCTP_DEBUG 814163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 815163953Srrs printf("Bogus length in error param- chunk left:%d errorlen:%d\n", 816163953Srrs chklen, error_len); 817163953Srrs } 818163953Srrs#endif /* SCTP_DEBUG */ 819163953Srrs return (0); 820163953Srrs } 821163953Srrs switch (error_type) { 822163953Srrs case SCTP_CAUSE_INVALID_STREAM: 823163953Srrs case SCTP_CAUSE_MISSING_PARAM: 824163953Srrs case SCTP_CAUSE_INVALID_PARAM: 825163953Srrs case SCTP_CAUSE_NO_USER_DATA: 826163953Srrs#ifdef SCTP_DEBUG 827163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 828163953Srrs printf("Software error we got a %d back? We have a bug :/ (or do they?)\n", 829163953Srrs error_type); 830163953Srrs } 831163953Srrs#endif 832163953Srrs break; 833163953Srrs case SCTP_CAUSE_STALE_COOKIE: 834163953Srrs /* 835163953Srrs * We only act if we have echoed a cookie and are 836163953Srrs * waiting. 837163953Srrs */ 838163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 839163953Srrs int *p; 840163953Srrs 841163953Srrs p = (int *)((caddr_t)phdr + sizeof(*phdr)); 842163953Srrs /* Save the time doubled */ 843163953Srrs asoc->cookie_preserve_req = ntohl(*p) << 1; 844163953Srrs asoc->stale_cookie_count++; 845163953Srrs if (asoc->stale_cookie_count > 846163953Srrs asoc->max_init_times) { 847163953Srrs sctp_abort_notification(stcb, 0); 848163953Srrs /* now free the asoc */ 849163953Srrs sctp_free_assoc(stcb->sctp_ep, stcb, 0); 850163953Srrs return (-1); 851163953Srrs } 852163953Srrs /* blast back to INIT state */ 853163953Srrs asoc->state &= ~SCTP_STATE_COOKIE_ECHOED; 854163953Srrs asoc->state |= SCTP_STATE_COOKIE_WAIT; 855163953Srrs 856163953Srrs sctp_stop_all_cookie_timers(stcb); 857163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 858163953Srrs } 859163953Srrs break; 860163953Srrs case SCTP_CAUSE_UNRESOLVABLE_ADDR: 861163953Srrs /* 862163953Srrs * Nothing we can do here, we don't do hostname 863163953Srrs * addresses so if the peer does not like my IPv6 864163953Srrs * (or IPv4 for that matter) it does not matter. If 865163953Srrs * they don't support that type of address, they can 866163953Srrs * NOT possibly get that packet type... i.e. with no 867163953Srrs * IPv6 you can't recieve a IPv6 packet. so we can 868163953Srrs * safely ignore this one. If we ever added support 869163953Srrs * for HOSTNAME Addresses, then we would need to do 870163953Srrs * something here. 871163953Srrs */ 872163953Srrs break; 873163953Srrs case SCTP_CAUSE_UNRECOG_CHUNK: 874163953Srrs sctp_process_unrecog_chunk(stcb, phdr, net); 875163953Srrs break; 876163953Srrs case SCTP_CAUSE_UNRECOG_PARAM: 877163953Srrs sctp_process_unrecog_param(stcb, phdr); 878163953Srrs break; 879163953Srrs case SCTP_CAUSE_COOKIE_IN_SHUTDOWN: 880163953Srrs /* 881163953Srrs * We ignore this since the timer will drive out a 882163953Srrs * new cookie anyway and there timer will drive us 883163953Srrs * to send a SHUTDOWN_COMPLETE. We can't send one 884163953Srrs * here since we don't have their tag. 885163953Srrs */ 886163953Srrs break; 887163953Srrs case SCTP_CAUSE_DELETING_LAST_ADDR: 888163953Srrs case SCTP_CAUSE_RESOURCE_SHORTAGE: 889163953Srrs case SCTP_CAUSE_DELETING_SRC_ADDR: 890163953Srrs /* 891163953Srrs * We should NOT get these here, but in a 892163953Srrs * ASCONF-ACK. n 893163953Srrs */ 894163953Srrs#ifdef SCTP_DEBUG 895163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 896163953Srrs printf("Peer sends ASCONF errors in a Operational Error?<%d>?\n", 897163953Srrs error_type); 898163953Srrs } 899163953Srrs#endif 900163953Srrs break; 901163953Srrs case SCTP_CAUSE_OUT_OF_RESC: 902163953Srrs /* 903163953Srrs * And what, pray tell do we do with the fact that 904163953Srrs * the peer is out of resources? Not really sure we 905163953Srrs * could do anything but abort. I suspect this n * 906163953Srrs * should have came WITH an abort instead of in a 907163953Srrs * OP-ERROR. 908163953Srrs */ 909163953Srrs break; 910163953Srrs default: 911163953Srrs#ifdef SCTP_DEBUG 912163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 913163953Srrs /* don't know what this error cause is... */ 914163953Srrs printf("sctp_handle_error: unknown error type = 0x%xh\n", 915163953Srrs error_type); 916163953Srrs } 917163953Srrs#endif /* SCTP_DEBUG */ 918163953Srrs break; 919163953Srrs } 920163953Srrs adjust = SCTP_SIZE32(error_len); 921163953Srrs chklen -= adjust; 922163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust); 923163953Srrs } 924163953Srrs return (0); 925163953Srrs} 926163953Srrs 927163953Srrsstatic int 928163953Srrssctp_handle_init_ack(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, 929163953Srrs struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 930163953Srrs struct sctp_nets *net) 931163953Srrs{ 932163953Srrs struct sctp_init_ack *init_ack; 933163953Srrs int *state; 934163953Srrs struct mbuf *op_err; 935163953Srrs 936163953Srrs#ifdef SCTP_DEBUG 937163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 938163953Srrs printf("sctp_handle_init_ack: handling INIT-ACK\n"); 939163953Srrs } 940163953Srrs#endif 941163953Srrs if (stcb == NULL) { 942163953Srrs#ifdef SCTP_DEBUG 943163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 944163953Srrs printf("sctp_handle_init_ack: TCB is null\n"); 945163953Srrs } 946163953Srrs#endif 947163953Srrs return (-1); 948163953Srrs } 949163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) { 950163953Srrs /* Invalid length */ 951163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 952163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 953163953Srrs op_err); 954163953Srrs return (-1); 955163953Srrs } 956163953Srrs init_ack = &cp->init; 957163953Srrs /* validate parameters */ 958163953Srrs if (init_ack->initiate_tag == 0) { 959163953Srrs /* protocol error... send an abort */ 960163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 961163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 962163953Srrs op_err); 963163953Srrs return (-1); 964163953Srrs } 965163953Srrs if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) { 966163953Srrs /* protocol error... send an abort */ 967163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 968163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 969163953Srrs op_err); 970163953Srrs return (-1); 971163953Srrs } 972163953Srrs if (init_ack->num_inbound_streams == 0) { 973163953Srrs /* protocol error... send an abort */ 974163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 975163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 976163953Srrs op_err); 977163953Srrs return (-1); 978163953Srrs } 979163953Srrs if (init_ack->num_outbound_streams == 0) { 980163953Srrs /* protocol error... send an abort */ 981163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 982163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 983163953Srrs op_err); 984163953Srrs return (-1); 985163953Srrs } 986163953Srrs /* process according to association state... */ 987163953Srrs state = &stcb->asoc.state; 988163953Srrs switch (*state & SCTP_STATE_MASK) { 989163953Srrs case SCTP_STATE_COOKIE_WAIT: 990163953Srrs /* this is the expected state for this chunk */ 991163953Srrs /* process the INIT-ACK parameters */ 992163953Srrs if (stcb->asoc.primary_destination->dest_state & 993163953Srrs SCTP_ADDR_UNCONFIRMED) { 994163953Srrs /* 995163953Srrs * The primary is where we sent the INIT, we can 996163953Srrs * always consider it confirmed when the INIT-ACK is 997163953Srrs * returned. Do this before we load addresses 998163953Srrs * though. 999163953Srrs */ 1000163953Srrs stcb->asoc.primary_destination->dest_state &= 1001163953Srrs ~SCTP_ADDR_UNCONFIRMED; 1002163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 1003163953Srrs stcb, 0, (void *)stcb->asoc.primary_destination); 1004163953Srrs } 1005163953Srrs if (sctp_process_init_ack(m, iphlen, offset, sh, cp, stcb, net 1006163953Srrs ) < 0) { 1007163953Srrs /* error in parsing parameters */ 1008163953Srrs return (-1); 1009163953Srrs } 1010163953Srrs /* update our state */ 1011163953Srrs#ifdef SCTP_DEBUG 1012163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 1013163953Srrs printf("moving to COOKIE-ECHOED state\n"); 1014163953Srrs } 1015163953Srrs#endif 1016163953Srrs if (*state & SCTP_STATE_SHUTDOWN_PENDING) { 1017163953Srrs *state = SCTP_STATE_COOKIE_ECHOED | 1018163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 1019163953Srrs } else { 1020163953Srrs *state = SCTP_STATE_COOKIE_ECHOED; 1021163953Srrs } 1022163953Srrs 1023163953Srrs /* reset the RTO calc */ 1024163953Srrs stcb->asoc.overall_error_count = 0; 1025163953Srrs SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1026163953Srrs /* 1027163953Srrs * collapse the init timer back in case of a exponential 1028163953Srrs * backoff n 1029163953Srrs */ 1030163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep, 1031163953Srrs stcb, net); 1032163953Srrs /* 1033163953Srrs * the send at the end of the inbound data processing will 1034163953Srrs * cause the cookie to be sent 1035163953Srrs */ 1036163953Srrs break; 1037163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 1038163953Srrs /* incorrect state... discard */ 1039163953Srrs break; 1040163953Srrs case SCTP_STATE_COOKIE_ECHOED: 1041163953Srrs /* incorrect state... discard */ 1042163953Srrs break; 1043163953Srrs case SCTP_STATE_OPEN: 1044163953Srrs /* incorrect state... discard */ 1045163953Srrs break; 1046163953Srrs case SCTP_STATE_EMPTY: 1047163953Srrs case SCTP_STATE_INUSE: 1048163953Srrs default: 1049163953Srrs /* incorrect state... discard */ 1050163953Srrs return (-1); 1051163953Srrs break; 1052163953Srrs } /* end switch asoc state */ 1053163953Srrs#ifdef SCTP_DEBUG 1054163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1055163953Srrs printf("Leaving handle-init-ack end\n"); 1056163953Srrs } 1057163953Srrs#endif 1058163953Srrs return (0); 1059163953Srrs} 1060163953Srrs 1061163953Srrs 1062163953Srrs/* 1063163953Srrs * handle a state cookie for an existing association m: input packet mbuf 1064163953Srrs * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a 1065163953Srrs * "split" mbuf and the cookie signature does not exist offset: offset into 1066163953Srrs * mbuf to the cookie-echo chunk 1067163953Srrs */ 1068163953Srrsstatic struct sctp_tcb * 1069163953Srrssctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset, 1070163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1071163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 1072163953Srrs struct sockaddr *init_src, int *notification, sctp_assoc_t * sac_assoc_id) 1073163953Srrs{ 1074163953Srrs struct sctp_association *asoc; 1075163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1076163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1077163953Srrs int chk_length; 1078163953Srrs int init_offset, initack_offset; 1079163953Srrs int retval; 1080163953Srrs 1081163953Srrs /* I know that the TCB is non-NULL from the caller */ 1082163953Srrs asoc = &stcb->asoc; 1083163953Srrs 1084163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) { 1085163953Srrs /* SHUTDOWN came in after sending INIT-ACK */ 1086163953Srrs struct mbuf *op_err; 1087163953Srrs struct sctp_paramhdr *ph; 1088163953Srrs 1089163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 1090163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 1091163953Srrs 1, M_DONTWAIT, 1, MT_DATA); 1092163953Srrs if (op_err == NULL) { 1093163953Srrs /* FOOBAR */ 1094163953Srrs return (NULL); 1095163953Srrs } 1096163953Srrs /* pre-reserve some space */ 1097163953Srrs op_err->m_data += sizeof(struct ip6_hdr); 1098163953Srrs op_err->m_data += sizeof(struct sctphdr); 1099163953Srrs op_err->m_data += sizeof(struct sctp_chunkhdr); 1100163953Srrs /* Set the len */ 1101163953Srrs op_err->m_len = op_err->m_pkthdr.len = sizeof(struct sctp_paramhdr); 1102163953Srrs ph = mtod(op_err, struct sctp_paramhdr *); 1103163953Srrs ph->param_type = htons(SCTP_CAUSE_COOKIE_IN_SHUTDOWN); 1104163953Srrs ph->param_length = htons(sizeof(struct sctp_paramhdr)); 1105163953Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag); 1106163953Srrs return (NULL); 1107163953Srrs } 1108163953Srrs /* 1109163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1110163953Srrs * INIT should start after the cookie-echo header struct (chunk 1111163953Srrs * header, state cookie header struct) 1112163953Srrs */ 1113163953Srrs init_offset = offset += sizeof(struct sctp_cookie_echo_chunk); 1114163953Srrs 1115163953Srrs init_cp = (struct sctp_init_chunk *) 1116163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1117163953Srrs (uint8_t *) & init_buf); 1118163953Srrs if (init_cp == NULL) { 1119163953Srrs /* could not pull a INIT chunk in cookie */ 1120163953Srrs return (NULL); 1121163953Srrs } 1122163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1123163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1124163953Srrs return (NULL); 1125163953Srrs } 1126163953Srrs /* 1127163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1128163953Srrs * INIT-ACK follows the INIT chunk 1129163953Srrs */ 1130163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1131163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1132163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1133163953Srrs (uint8_t *) & initack_buf); 1134163953Srrs if (initack_cp == NULL) { 1135163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1136163953Srrs return (NULL); 1137163953Srrs } 1138163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1139163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1140163953Srrs return (NULL); 1141163953Srrs } 1142163953Srrs if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) && 1143163953Srrs (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) { 1144163953Srrs /* 1145163953Srrs * case D in Section 5.2.4 Table 2: MMAA process accordingly 1146163953Srrs * to get into the OPEN state 1147163953Srrs */ 1148163953Srrs switch SCTP_GET_STATE 1149163953Srrs (asoc) { 1150163953Srrs case SCTP_STATE_COOKIE_WAIT: 1151163953Srrs /* 1152163953Srrs * INIT was sent, but got got a COOKIE_ECHO with the 1153163953Srrs * correct tags... just accept it... 1154163953Srrs */ 1155163953Srrs /* First we must process the INIT !! */ 1156163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1157163953Srrs if (retval < 0) { 1158163953Srrs return (NULL); 1159163953Srrs } 1160163953Srrs /* intentional fall through to below... */ 1161163953Srrs 1162163953Srrs case SCTP_STATE_COOKIE_ECHOED: 1163163953Srrs /* Duplicate INIT case */ 1164163953Srrs /* we have already processed the INIT so no problem */ 1165163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, 1166163953Srrs net); 1167163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 1168163953Srrs sctp_stop_all_cookie_timers(stcb); 1169163953Srrs /* update current state */ 1170163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1171163953Srrs asoc->state = SCTP_STATE_OPEN | 1172163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 1173163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1174163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1175163953Srrs 1176163953Srrs } else if ((asoc->state & SCTP_STATE_SHUTDOWN_SENT) == 0) { 1177163953Srrs /* if ok, move to OPEN state */ 1178163953Srrs asoc->state = SCTP_STATE_OPEN; 1179163953Srrs } 1180163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1181163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1182163953Srrs (inp->sctp_socket->so_qlimit == 0) 1183163953Srrs ) { 1184163953Srrs /* 1185163953Srrs * Here is where collision would go if we 1186163953Srrs * did a connect() and instead got a 1187163953Srrs * init/init-ack/cookie done before the 1188163953Srrs * init-ack came back.. 1189163953Srrs */ 1190163953Srrs stcb->sctp_ep->sctp_flags |= 1191163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1192163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1193163953Srrs } 1194163953Srrs /* notify upper layer */ 1195163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1196163953Srrs /* 1197163953Srrs * since we did not send a HB make sure we don't 1198163953Srrs * double things 1199163953Srrs */ 1200163953Srrs net->hb_responded = 1; 1201163953Srrs 1202163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1203163953Srrs (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) { 1204163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 1205163953Srrs inp, stcb, NULL); 1206163953Srrs } 1207163953Srrs break; 1208163953Srrs default: 1209163953Srrs /* 1210163953Srrs * we're in the OPEN state (or beyond), so peer must 1211163953Srrs * have simply lost the COOKIE-ACK 1212163953Srrs */ 1213163953Srrs break; 1214163953Srrs } /* end switch */ 1215163953Srrs 1216163953Srrs /* 1217163953Srrs * We ignore the return code here.. not sure if we should 1218163953Srrs * somehow abort.. but we do have an existing asoc. This 1219163953Srrs * really should not fail. 1220163953Srrs */ 1221163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1222163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1223163953Srrs initack_offset, sh, init_src)) { 1224163953Srrs return (NULL); 1225163953Srrs } 1226163953Srrs /* respond with a COOKIE-ACK */ 1227163953Srrs sctp_send_cookie_ack(stcb); 1228163953Srrs return (stcb); 1229163953Srrs } /* end if */ 1230163953Srrs if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1231163953Srrs ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag && 1232163953Srrs cookie->tie_tag_my_vtag == 0 && 1233163953Srrs cookie->tie_tag_peer_vtag == 0) { 1234163953Srrs /* 1235163953Srrs * case C in Section 5.2.4 Table 2: XMOO silently discard 1236163953Srrs */ 1237163953Srrs return (NULL); 1238163953Srrs } 1239163953Srrs if (ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag && 1240163953Srrs (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag || 1241163953Srrs init_cp->init.initiate_tag == 0)) { 1242163953Srrs /* 1243163953Srrs * case B in Section 5.2.4 Table 2: MXAA or MOAA my info 1244163953Srrs * should be ok, re-accept peer info 1245163953Srrs */ 1246163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); 1247163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 1248163953Srrs sctp_stop_all_cookie_timers(stcb); 1249163953Srrs /* 1250163953Srrs * since we did not send a HB make sure we don't double 1251163953Srrs * things 1252163953Srrs */ 1253163953Srrs net->hb_responded = 1; 1254163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1255163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1256163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1257163953Srrs NULL); 1258163953Srrs } 1259163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1260163953Srrs asoc->pre_open_streams = 1261163953Srrs ntohs(initack_cp->init.num_outbound_streams); 1262163953Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1263163953Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = 1264163953Srrs asoc->init_seq_number; 1265163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1266163953Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1267163953Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1268163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1269163953Srrs 1270163953Srrs /* process the INIT info (peer's info) */ 1271163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1272163953Srrs if (retval < 0) { 1273163953Srrs return (NULL); 1274163953Srrs } 1275163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1276163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1277163953Srrs initack_offset, sh, init_src)) { 1278163953Srrs return (NULL); 1279163953Srrs } 1280163953Srrs if ((asoc->state & SCTP_STATE_COOKIE_WAIT) || 1281163953Srrs (asoc->state & SCTP_STATE_COOKIE_ECHOED)) { 1282163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1283163953Srrs 1284163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1285163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1286163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1287163953Srrs stcb->sctp_ep->sctp_flags |= 1288163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1289163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1290163953Srrs } 1291163953Srrs } 1292163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1293163953Srrs asoc->state = SCTP_STATE_OPEN | 1294163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 1295163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1296163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1297163953Srrs 1298163953Srrs } else { 1299163953Srrs asoc->state = SCTP_STATE_OPEN; 1300163953Srrs } 1301163953Srrs sctp_stop_all_cookie_timers(stcb); 1302163953Srrs sctp_send_cookie_ack(stcb); 1303163953Srrs return (stcb); 1304163953Srrs } 1305163953Srrs if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1306163953Srrs ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) && 1307163953Srrs cookie->tie_tag_my_vtag == asoc->my_vtag_nonce && 1308163953Srrs cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce && 1309163953Srrs cookie->tie_tag_peer_vtag != 0) { 1310163953Srrs struct sctpasochead *head; 1311163953Srrs 1312163953Srrs /* 1313163953Srrs * case A in Section 5.2.4 Table 2: XXMM (peer restarted) 1314163953Srrs */ 1315163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 1316163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); 1317163953Srrs *sac_assoc_id = sctp_get_associd(stcb); 1318163953Srrs /* notify upper layer */ 1319163953Srrs *notification = SCTP_NOTIFY_ASSOC_RESTART; 1320163953Srrs 1321163953Srrs 1322163953Srrs /* send up all the data */ 1323163953Srrs sctp_report_all_outbound(stcb); 1324163953Srrs 1325163953Srrs /* process the INIT-ACK info (my info) */ 1326163953Srrs asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1327163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1328163953Srrs 1329163953Srrs /* pull from vtag hash */ 1330163953Srrs LIST_REMOVE(stcb, sctp_asocs); 1331163953Srrs /* re-insert to new vtag position */ 1332163953Srrs head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 1333163953Srrs sctppcbinfo.hashasocmark)]; 1334163953Srrs /* 1335163953Srrs * put it in the bucket in the vtag hash of assoc's for the 1336163953Srrs * system 1337163953Srrs */ 1338163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_asocs); 1339163953Srrs 1340163953Srrs /* Is this the first restart? */ 1341163953Srrs if (stcb->asoc.in_restart_hash == 0) { 1342163953Srrs /* Ok add it to assoc_id vtag hash */ 1343163953Srrs head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 1344163953Srrs sctppcbinfo.hashrestartmark)]; 1345163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_tcbrestarhash); 1346163953Srrs stcb->asoc.in_restart_hash = 1; 1347163953Srrs } 1348163953Srrs asoc->pre_open_streams = 1349163953Srrs ntohs(initack_cp->init.num_outbound_streams); 1350163953Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1351163953Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1352163953Srrs 1353163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1354163953Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1355163953Srrs 1356163953Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1357163953Srrs 1358163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1359163953Srrs if (asoc->mapping_array) 1360163953Srrs memset(asoc->mapping_array, 0, 1361163953Srrs asoc->mapping_array_size); 1362163953Srrs /* process the INIT info (peer's info) */ 1363163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1364163953Srrs if (retval < 0) { 1365163953Srrs return (NULL); 1366163953Srrs } 1367163953Srrs /* 1368163953Srrs * since we did not send a HB make sure we don't double 1369163953Srrs * things 1370163953Srrs */ 1371163953Srrs net->hb_responded = 1; 1372163953Srrs 1373163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1374163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1375163953Srrs initack_offset, sh, init_src)) { 1376163953Srrs return (NULL); 1377163953Srrs } 1378163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1379163953Srrs asoc->state = SCTP_STATE_OPEN | 1380163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 1381163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1382163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1383163953Srrs 1384163953Srrs } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) { 1385163953Srrs /* move to OPEN state, if not in SHUTDOWN_SENT */ 1386163953Srrs asoc->state = SCTP_STATE_OPEN; 1387163953Srrs } 1388163953Srrs /* respond with a COOKIE-ACK */ 1389163953Srrs sctp_stop_all_cookie_timers(stcb); 1390163953Srrs sctp_send_cookie_ack(stcb); 1391163953Srrs 1392163953Srrs return (stcb); 1393163953Srrs } 1394163953Srrs /* if we are not a restart we need the assoc_id field pop'd */ 1395163953Srrs asoc->assoc_id = ntohl(initack_cp->init.initiate_tag); 1396163953Srrs 1397163953Srrs /* all other cases... */ 1398163953Srrs return (NULL); 1399163953Srrs} 1400163953Srrs 1401163953Srrs/* 1402163953Srrs * handle a state cookie for a new association m: input packet mbuf chain-- 1403163953Srrs * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf 1404163953Srrs * and the cookie signature does not exist offset: offset into mbuf to the 1405163953Srrs * cookie-echo chunk length: length of the cookie chunk to: where the init 1406163953Srrs * was from returns a new TCB 1407163953Srrs */ 1408163953Srrsstatic struct sctp_tcb * 1409163953Srrssctp_process_cookie_new(struct mbuf *m, int iphlen, int offset, 1410163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1411163953Srrs struct sctp_inpcb *inp, struct sctp_nets **netp, 1412163953Srrs struct sockaddr *init_src, int *notification, 1413163953Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len) 1414163953Srrs{ 1415163953Srrs struct sctp_tcb *stcb; 1416163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1417163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1418163953Srrs struct sockaddr_storage sa_store; 1419163953Srrs struct sockaddr *initack_src = (struct sockaddr *)&sa_store; 1420163953Srrs struct sockaddr_in *sin; 1421163953Srrs struct sockaddr_in6 *sin6; 1422163953Srrs struct sctp_association *asoc; 1423163953Srrs int chk_length; 1424163953Srrs int init_offset, initack_offset, initack_limit; 1425163953Srrs int retval; 1426163953Srrs int error = 0; 1427163953Srrs uint32_t old_tag; 1428163953Srrs uint8_t chunk_buf[DEFAULT_CHUNK_BUFFER]; 1429163953Srrs 1430163953Srrs /* 1431163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1432163953Srrs * INIT should start after the cookie-echo header struct (chunk 1433163953Srrs * header, state cookie header struct) 1434163953Srrs */ 1435163953Srrs init_offset = offset + sizeof(struct sctp_cookie_echo_chunk); 1436163953Srrs init_cp = (struct sctp_init_chunk *) 1437163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1438163953Srrs (uint8_t *) & init_buf); 1439163953Srrs if (init_cp == NULL) { 1440163953Srrs /* could not pull a INIT chunk in cookie */ 1441163953Srrs#ifdef SCTP_DEBUG 1442163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1443163953Srrs printf("process_cookie_new: could not pull INIT chunk hdr\n"); 1444163953Srrs } 1445163953Srrs#endif /* SCTP_DEBUG */ 1446163953Srrs return (NULL); 1447163953Srrs } 1448163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1449163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1450163953Srrs#ifdef SCTP_DEBUG 1451163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1452163953Srrs printf("HUH? process_cookie_new: could not find INIT chunk!\n"); 1453163953Srrs } 1454163953Srrs#endif /* SCTP_DEBUG */ 1455163953Srrs return (NULL); 1456163953Srrs } 1457163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1458163953Srrs /* 1459163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1460163953Srrs * INIT-ACK follows the INIT chunk 1461163953Srrs */ 1462163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1463163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1464163953Srrs (uint8_t *) & initack_buf); 1465163953Srrs if (initack_cp == NULL) { 1466163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1467163953Srrs#ifdef SCTP_DEBUG 1468163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1469163953Srrs printf("process_cookie_new: could not pull INIT-ACK chunk hdr\n"); 1470163953Srrs } 1471163953Srrs#endif /* SCTP_DEBUG */ 1472163953Srrs return (NULL); 1473163953Srrs } 1474163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1475163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1476163953Srrs return (NULL); 1477163953Srrs } 1478163953Srrs /* 1479163953Srrs * NOTE: We can't use the INIT_ACK's chk_length to determine the 1480163953Srrs * "initack_limit" value. This is because the chk_length field 1481163953Srrs * includes the length of the cookie, but the cookie is omitted when 1482163953Srrs * the INIT and INIT_ACK are tacked onto the cookie... 1483163953Srrs */ 1484163953Srrs initack_limit = offset + cookie_len; 1485163953Srrs 1486163953Srrs /* 1487163953Srrs * now that we know the INIT/INIT-ACK are in place, create a new TCB 1488163953Srrs * and popluate 1489163953Srrs */ 1490163953Srrs stcb = sctp_aloc_assoc(inp, init_src, 0, &error, 1491163953Srrs ntohl(initack_cp->init.initiate_tag)); 1492163953Srrs if (stcb == NULL) { 1493163953Srrs struct mbuf *op_err; 1494163953Srrs 1495163953Srrs /* memory problem? */ 1496163953Srrs#ifdef SCTP_DEBUG 1497163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1498163953Srrs printf("process_cookie_new: no room for another TCB!\n"); 1499163953Srrs } 1500163953Srrs#endif /* SCTP_DEBUG */ 1501163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1502163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1503163953Srrs sh, op_err); 1504163953Srrs return (NULL); 1505163953Srrs } 1506163953Srrs /* get the correct sctp_nets */ 1507163953Srrs *netp = sctp_findnet(stcb, init_src); 1508163953Srrs asoc = &stcb->asoc; 1509163953Srrs /* get scope variables out of cookie */ 1510163953Srrs asoc->ipv4_local_scope = cookie->ipv4_scope; 1511163953Srrs asoc->site_scope = cookie->site_scope; 1512163953Srrs asoc->local_scope = cookie->local_scope; 1513163953Srrs asoc->loopback_scope = cookie->loopback_scope; 1514163953Srrs 1515163953Srrs if ((asoc->ipv4_addr_legal != cookie->ipv4_addr_legal) || 1516163953Srrs (asoc->ipv6_addr_legal != cookie->ipv6_addr_legal)) { 1517163953Srrs struct mbuf *op_err; 1518163953Srrs 1519163953Srrs /* 1520163953Srrs * Houston we have a problem. The EP changed while the 1521163953Srrs * cookie was in flight. Only recourse is to abort the 1522163953Srrs * association. 1523163953Srrs */ 1524163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1525163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1526163953Srrs sh, op_err); 1527163953Srrs return (NULL); 1528163953Srrs } 1529163953Srrs /* process the INIT-ACK info (my info) */ 1530163953Srrs old_tag = asoc->my_vtag; 1531163953Srrs asoc->assoc_id = asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1532163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1533163953Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1534163953Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1535163953Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1536163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1537163953Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1538163953Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1539163953Srrs 1540163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1541163953Srrs 1542163953Srrs /* process the INIT info (peer's info) */ 1543163953Srrs retval = sctp_process_init(init_cp, stcb, *netp); 1544163953Srrs if (retval < 0) { 1545163953Srrs sctp_free_assoc(inp, stcb, 0); 1546163953Srrs return (NULL); 1547163953Srrs } 1548163953Srrs /* load all addresses */ 1549163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1550163953Srrs init_offset + sizeof(struct sctp_init_chunk), initack_offset, sh, 1551163953Srrs init_src)) { 1552163953Srrs sctp_free_assoc(inp, stcb, 0); 1553163953Srrs return (NULL); 1554163953Srrs } 1555163953Srrs /* 1556163953Srrs * verify any preceding AUTH chunk that was skipped 1557163953Srrs */ 1558163953Srrs /* pull the local authentication parameters from the cookie/init-ack */ 1559163953Srrs sctp_auth_get_cookie_params(stcb, m, 1560163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1561163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk))); 1562163953Srrs if (auth_skipped) { 1563163953Srrs struct sctp_auth_chunk *auth; 1564163953Srrs 1565163953Srrs auth = (struct sctp_auth_chunk *) 1566163953Srrs sctp_m_getptr(m, auth_offset, auth_len, chunk_buf); 1567163953Srrs if (sctp_handle_auth(stcb, auth, m, auth_offset)) { 1568163953Srrs /* auth HMAC failed, dump the assoc and packet */ 1569163953Srrs#ifdef SCTP_DEBUG 1570163953Srrs if (sctp_debug_on & SCTP_DEBUG_AUTH1) 1571163953Srrs printf("COOKIE-ECHO: AUTH failed\n"); 1572163953Srrs#endif /* SCTP_DEBUG */ 1573163953Srrs sctp_free_assoc(inp, stcb, 0); 1574163953Srrs return (NULL); 1575163953Srrs } else { 1576163953Srrs /* remaining chunks checked... good to go */ 1577163953Srrs stcb->asoc.authenticated = 1; 1578163953Srrs } 1579163953Srrs } 1580163953Srrs /* update current state */ 1581163953Srrs#ifdef SCTP_DEBUG 1582163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 1583163953Srrs printf("moving to OPEN state\n"); 1584163953Srrs } 1585163953Srrs#endif 1586163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1587163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1588163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1589163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1590163953Srrs } else { 1591163953Srrs asoc->state = SCTP_STATE_OPEN; 1592163953Srrs } 1593163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_passiveestab); 1594163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1595163953Srrs sctp_stop_all_cookie_timers(stcb); 1596163953Srrs /* calculate the RTT */ 1597163953Srrs (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp, 1598163953Srrs &cookie->time_entered); 1599163953Srrs 1600163953Srrs /* 1601163953Srrs * if we're doing ASCONFs, check to see if we have any new local 1602163953Srrs * addresses that need to get added to the peer (eg. addresses 1603163953Srrs * changed while cookie echo in flight). This needs to be done 1604163953Srrs * after we go to the OPEN state to do the correct asconf 1605163953Srrs * processing. else, make sure we have the correct addresses in our 1606163953Srrs * lists 1607163953Srrs */ 1608163953Srrs 1609163953Srrs /* warning, we re-use sin, sin6, sa_store here! */ 1610163953Srrs /* pull in local_address (our "from" address) */ 1611163953Srrs if (cookie->laddr_type == SCTP_IPV4_ADDRESS) { 1612163953Srrs /* source addr is IPv4 */ 1613163953Srrs sin = (struct sockaddr_in *)initack_src; 1614163953Srrs memset(sin, 0, sizeof(*sin)); 1615163953Srrs sin->sin_family = AF_INET; 1616163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 1617163953Srrs sin->sin_addr.s_addr = cookie->laddress[0]; 1618163953Srrs } else if (cookie->laddr_type == SCTP_IPV6_ADDRESS) { 1619163953Srrs /* source addr is IPv6 */ 1620163953Srrs sin6 = (struct sockaddr_in6 *)initack_src; 1621163953Srrs memset(sin6, 0, sizeof(*sin6)); 1622163953Srrs sin6->sin6_family = AF_INET6; 1623163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1624163953Srrs sin6->sin6_scope_id = cookie->scope_id; 1625163953Srrs memcpy(&sin6->sin6_addr, cookie->laddress, 1626163953Srrs sizeof(sin6->sin6_addr)); 1627163953Srrs } else { 1628163953Srrs sctp_free_assoc(inp, stcb, 0); 1629163953Srrs return (NULL); 1630163953Srrs } 1631163953Srrs 1632163953Srrs sctp_check_address_list(stcb, m, 1633163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1634163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)), 1635163953Srrs initack_src, cookie->local_scope, cookie->site_scope, 1636163953Srrs cookie->ipv4_scope, cookie->loopback_scope); 1637163953Srrs 1638163953Srrs 1639163953Srrs /* set up to notify upper layer */ 1640163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1641163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1642163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1643163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1644163953Srrs /* 1645163953Srrs * This is an endpoint that called connect() how it got a 1646163953Srrs * cookie that is NEW is a bit of a mystery. It must be that 1647163953Srrs * the INIT was sent, but before it got there.. a complete 1648163953Srrs * INIT/INIT-ACK/COOKIE arrived. But of course then it 1649163953Srrs * should have went to the other code.. not here.. oh well.. 1650163953Srrs * a bit of protection is worth having.. 1651163953Srrs */ 1652163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1653163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1654163953Srrs } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 1655163953Srrs (inp->sctp_socket->so_qlimit)) { 1656163953Srrs /* 1657163953Srrs * We don't want to do anything with this one. Since it is 1658163953Srrs * the listening guy. The timer will get started for 1659163953Srrs * accepted connections in the caller. 1660163953Srrs */ 1661163953Srrs ; 1662163953Srrs } 1663163953Srrs /* since we did not send a HB make sure we don't double things */ 1664163953Srrs (*netp)->hb_responded = 1; 1665163953Srrs 1666163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1667163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1668163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL); 1669163953Srrs } 1670163953Srrs /* respond with a COOKIE-ACK */ 1671163953Srrs sctp_send_cookie_ack(stcb); 1672163953Srrs return (stcb); 1673163953Srrs} 1674163953Srrs 1675163953Srrs 1676163953Srrs/* 1677163953Srrs * handles a COOKIE-ECHO message stcb: modified to either a new or left as 1678163953Srrs * existing (non-NULL) TCB 1679163953Srrs */ 1680163953Srrsstatic struct mbuf * 1681163953Srrssctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset, 1682163953Srrs struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp, 1683163953Srrs struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp, 1684163953Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len) 1685163953Srrs{ 1686163953Srrs struct sctp_state_cookie *cookie; 1687163953Srrs struct sockaddr_in6 sin6; 1688163953Srrs struct sockaddr_in sin; 1689163953Srrs struct sctp_tcb *l_stcb = *stcb; 1690163953Srrs struct sctp_inpcb *l_inp; 1691163953Srrs struct sockaddr *to; 1692163953Srrs sctp_assoc_t sac_restart_id; 1693163953Srrs struct sctp_pcb *ep; 1694163953Srrs struct mbuf *m_sig; 1695163953Srrs uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE]; 1696163953Srrs uint8_t *sig; 1697163953Srrs uint8_t cookie_ok = 0; 1698163953Srrs unsigned int size_of_pkt, sig_offset, cookie_offset; 1699163953Srrs unsigned int cookie_len; 1700163953Srrs struct timeval now; 1701163953Srrs struct timeval time_expires; 1702163953Srrs struct sockaddr_storage dest_store; 1703163953Srrs struct sockaddr *localep_sa = (struct sockaddr *)&dest_store; 1704163953Srrs struct ip *iph; 1705163953Srrs int notification = 0; 1706163953Srrs struct sctp_nets *netl; 1707163953Srrs int had_a_existing_tcb = 0; 1708163953Srrs 1709163953Srrs#ifdef SCTP_DEBUG 1710163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 1711163953Srrs printf("sctp_handle_cookie: handling COOKIE-ECHO\n"); 1712163953Srrs } 1713163953Srrs#endif 1714163953Srrs 1715163953Srrs if (inp_p == NULL) { 1716163953Srrs return (NULL); 1717163953Srrs } 1718163953Srrs /* First get the destination address setup too. */ 1719163953Srrs iph = mtod(m, struct ip *); 1720163953Srrs if (iph->ip_v == IPVERSION) { 1721163953Srrs /* its IPv4 */ 1722163953Srrs struct sockaddr_in *sin; 1723163953Srrs 1724163953Srrs sin = (struct sockaddr_in *)(localep_sa); 1725163953Srrs memset(sin, 0, sizeof(*sin)); 1726163953Srrs sin->sin_family = AF_INET; 1727163953Srrs sin->sin_len = sizeof(*sin); 1728163953Srrs sin->sin_port = sh->dest_port; 1729163953Srrs sin->sin_addr.s_addr = iph->ip_dst.s_addr; 1730163953Srrs } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1731163953Srrs /* its IPv6 */ 1732163953Srrs struct ip6_hdr *ip6; 1733163953Srrs struct sockaddr_in6 *sin6; 1734163953Srrs 1735163953Srrs sin6 = (struct sockaddr_in6 *)(localep_sa); 1736163953Srrs memset(sin6, 0, sizeof(*sin6)); 1737163953Srrs sin6->sin6_family = AF_INET6; 1738163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1739163953Srrs ip6 = mtod(m, struct ip6_hdr *); 1740163953Srrs sin6->sin6_port = sh->dest_port; 1741163953Srrs sin6->sin6_addr = ip6->ip6_dst; 1742163953Srrs } else { 1743163953Srrs return (NULL); 1744163953Srrs } 1745163953Srrs 1746163953Srrs cookie = &cp->cookie; 1747163953Srrs cookie_offset = offset + sizeof(struct sctp_chunkhdr); 1748163953Srrs cookie_len = ntohs(cp->ch.chunk_length); 1749163953Srrs 1750163953Srrs if ((cookie->peerport != sh->src_port) && 1751163953Srrs (cookie->myport != sh->dest_port) && 1752163953Srrs (cookie->my_vtag != sh->v_tag)) { 1753163953Srrs /* 1754163953Srrs * invalid ports or bad tag. Note that we always leave the 1755163953Srrs * v_tag in the header in network order and when we stored 1756163953Srrs * it in the my_vtag slot we also left it in network order. 1757163953Srrs * This maintians the match even though it may be in the 1758163953Srrs * opposite byte order of the machine :-> 1759163953Srrs */ 1760163953Srrs return (NULL); 1761163953Srrs } 1762163953Srrs /* compute size of packet */ 1763163953Srrs if (m->m_flags & M_PKTHDR) { 1764163953Srrs size_of_pkt = m->m_pkthdr.len; 1765163953Srrs } else { 1766163953Srrs /* Should have a pkt hdr really */ 1767163953Srrs struct mbuf *mat; 1768163953Srrs 1769163953Srrs mat = m; 1770163953Srrs size_of_pkt = 0; 1771163953Srrs while (mat != NULL) { 1772163953Srrs size_of_pkt += mat->m_len; 1773163953Srrs mat = mat->m_next; 1774163953Srrs } 1775163953Srrs } 1776163953Srrs if (cookie_len > size_of_pkt || 1777163953Srrs cookie_len < sizeof(struct sctp_cookie_echo_chunk) + 1778163953Srrs sizeof(struct sctp_init_chunk) + 1779163953Srrs sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) { 1780163953Srrs /* cookie too long! or too small */ 1781163953Srrs return (NULL); 1782163953Srrs } 1783163953Srrs /* 1784163953Srrs * split off the signature into its own mbuf (since it should not be 1785163953Srrs * calculated in the sctp_hmac_m() call). 1786163953Srrs */ 1787163953Srrs sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE; 1788163953Srrs if (sig_offset > size_of_pkt) { 1789163953Srrs /* packet not correct size! */ 1790163953Srrs /* XXX this may already be accounted for earlier... */ 1791163953Srrs return (NULL); 1792163953Srrs } 1793163953Srrs m_sig = m_split(m, sig_offset, M_DONTWAIT); 1794163953Srrs if (m_sig == NULL) { 1795163953Srrs /* out of memory or ?? */ 1796163953Srrs return (NULL); 1797163953Srrs } 1798163953Srrs /* 1799163953Srrs * compute the signature/digest for the cookie 1800163953Srrs */ 1801163953Srrs ep = &(*inp_p)->sctp_ep; 1802163953Srrs l_inp = *inp_p; 1803163953Srrs if (l_stcb) { 1804163953Srrs SCTP_TCB_UNLOCK(l_stcb); 1805163953Srrs } 1806163953Srrs SCTP_INP_RLOCK(l_inp); 1807163953Srrs if (l_stcb) { 1808163953Srrs SCTP_TCB_LOCK(l_stcb); 1809163953Srrs } 1810163953Srrs /* which cookie is it? */ 1811163953Srrs if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) && 1812163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1813163953Srrs /* it's the old cookie */ 1814163953Srrs sctp_hmac_m(SCTP_HMAC, 1815163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1816163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1817163953Srrs } else { 1818163953Srrs /* it's the current cookie */ 1819163953Srrs sctp_hmac_m(SCTP_HMAC, 1820163953Srrs (uint8_t *) ep->secret_key[(int)ep->current_secret_number], 1821163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1822163953Srrs } 1823163953Srrs /* get the signature */ 1824163953Srrs SCTP_INP_RUNLOCK(l_inp); 1825163953Srrs sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig); 1826163953Srrs if (sig == NULL) { 1827163953Srrs /* couldn't find signature */ 1828164085Srrs sctp_m_freem(m_sig); 1829163953Srrs return (NULL); 1830163953Srrs } 1831163953Srrs /* compare the received digest with the computed digest */ 1832163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) { 1833163953Srrs /* try the old cookie? */ 1834163953Srrs if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) && 1835163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1836163953Srrs /* compute digest with old */ 1837163953Srrs sctp_hmac_m(SCTP_HMAC, 1838163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1839163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1840163953Srrs /* compare */ 1841163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0) 1842163953Srrs cookie_ok = 1; 1843163953Srrs } 1844163953Srrs } else { 1845163953Srrs cookie_ok = 1; 1846163953Srrs } 1847163953Srrs 1848163953Srrs /* 1849163953Srrs * Now before we continue we must reconstruct our mbuf so that 1850163953Srrs * normal processing of any other chunks will work. 1851163953Srrs */ 1852163953Srrs { 1853163953Srrs struct mbuf *m_at; 1854163953Srrs 1855163953Srrs m_at = m; 1856163953Srrs while (m_at->m_next != NULL) { 1857163953Srrs m_at = m_at->m_next; 1858163953Srrs } 1859163953Srrs m_at->m_next = m_sig; 1860163953Srrs if (m->m_flags & M_PKTHDR) { 1861163953Srrs /* 1862163953Srrs * We should only do this if and only if the front 1863163953Srrs * mbuf has a m_pkthdr... it should in theory. 1864163953Srrs */ 1865163953Srrs if (m_sig->m_flags & M_PKTHDR) { 1866163953Srrs /* Add back to the pkt hdr of main m chain */ 1867163953Srrs m->m_pkthdr.len += m_sig->m_pkthdr.len; 1868163953Srrs } else { 1869163953Srrs /* 1870163953Srrs * Got a problem, no pkthdr in split chain. 1871163953Srrs * TSNH but we will handle it just in case 1872163953Srrs */ 1873163953Srrs int mmlen = 0; 1874163953Srrs struct mbuf *lat; 1875163953Srrs 1876163953Srrs printf("Warning: Hitting m_split join TSNH code - fixed\n"); 1877163953Srrs lat = m_sig; 1878163953Srrs while (lat) { 1879163953Srrs mmlen += lat->m_len; 1880163953Srrs lat = lat->m_next; 1881163953Srrs } 1882163953Srrs m->m_pkthdr.len += mmlen; 1883163953Srrs } 1884163953Srrs } 1885163953Srrs } 1886163953Srrs 1887163953Srrs if (cookie_ok == 0) { 1888163953Srrs#ifdef SCTP_DEBUG 1889163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 1890163953Srrs printf("handle_cookie_echo: cookie signature validation failed!\n"); 1891163953Srrs printf("offset = %u, cookie_offset = %u, sig_offset = %u\n", 1892163953Srrs (uint32_t) offset, cookie_offset, sig_offset); 1893163953Srrs } 1894163953Srrs#endif 1895163953Srrs return (NULL); 1896163953Srrs } 1897163953Srrs /* 1898163953Srrs * check the cookie timestamps to be sure it's not stale 1899163953Srrs */ 1900163953Srrs SCTP_GETTIME_TIMEVAL(&now); 1901163953Srrs /* Expire time is in Ticks, so we convert to seconds */ 1902163953Srrs time_expires.tv_sec = cookie->time_entered.tv_sec + cookie->cookie_life; 1903163953Srrs time_expires.tv_usec = cookie->time_entered.tv_usec; 1904163953Srrs if (timevalcmp(&now, &time_expires, >)) { 1905163953Srrs /* cookie is stale! */ 1906163953Srrs struct mbuf *op_err; 1907163953Srrs struct sctp_stale_cookie_msg *scm; 1908163953Srrs uint32_t tim; 1909163953Srrs 1910163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_stale_cookie_msg), 1911163953Srrs 1, M_DONTWAIT, 1, MT_DATA); 1912163953Srrs if (op_err == NULL) { 1913163953Srrs /* FOOBAR */ 1914163953Srrs return (NULL); 1915163953Srrs } 1916163953Srrs /* pre-reserve some space */ 1917163953Srrs op_err->m_data += sizeof(struct ip6_hdr); 1918163953Srrs op_err->m_data += sizeof(struct sctphdr); 1919163953Srrs op_err->m_data += sizeof(struct sctp_chunkhdr); 1920163953Srrs 1921163953Srrs /* Set the len */ 1922163953Srrs op_err->m_len = op_err->m_pkthdr.len = sizeof(struct sctp_stale_cookie_msg); 1923163953Srrs scm = mtod(op_err, struct sctp_stale_cookie_msg *); 1924163953Srrs scm->ph.param_type = htons(SCTP_CAUSE_STALE_COOKIE); 1925163953Srrs scm->ph.param_length = htons((sizeof(struct sctp_paramhdr) + 1926163953Srrs (sizeof(uint32_t)))); 1927163953Srrs /* seconds to usec */ 1928163953Srrs tim = (now.tv_sec - time_expires.tv_sec) * 1000000; 1929163953Srrs /* add in usec */ 1930163953Srrs if (tim == 0) 1931163953Srrs tim = now.tv_usec - cookie->time_entered.tv_usec; 1932163953Srrs scm->time_usec = htonl(tim); 1933163953Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag); 1934163953Srrs return (NULL); 1935163953Srrs } 1936163953Srrs /* 1937163953Srrs * Now we must see with the lookup address if we have an existing 1938163953Srrs * asoc. This will only happen if we were in the COOKIE-WAIT state 1939163953Srrs * and a INIT collided with us and somewhere the peer sent the 1940163953Srrs * cookie on another address besides the single address our assoc 1941163953Srrs * had for him. In this case we will have one of the tie-tags set at 1942163953Srrs * least AND the address field in the cookie can be used to look it 1943163953Srrs * up. 1944163953Srrs */ 1945163953Srrs to = NULL; 1946163953Srrs if (cookie->addr_type == SCTP_IPV6_ADDRESS) { 1947163953Srrs memset(&sin6, 0, sizeof(sin6)); 1948163953Srrs sin6.sin6_family = AF_INET6; 1949163953Srrs sin6.sin6_len = sizeof(sin6); 1950163953Srrs sin6.sin6_port = sh->src_port; 1951163953Srrs sin6.sin6_scope_id = cookie->scope_id; 1952163953Srrs memcpy(&sin6.sin6_addr.s6_addr, cookie->address, 1953163953Srrs sizeof(sin6.sin6_addr.s6_addr)); 1954163953Srrs to = (struct sockaddr *)&sin6; 1955163953Srrs } else if (cookie->addr_type == SCTP_IPV4_ADDRESS) { 1956163953Srrs memset(&sin, 0, sizeof(sin)); 1957163953Srrs sin.sin_family = AF_INET; 1958163953Srrs sin.sin_len = sizeof(sin); 1959163953Srrs sin.sin_port = sh->src_port; 1960163953Srrs sin.sin_addr.s_addr = cookie->address[0]; 1961163953Srrs to = (struct sockaddr *)&sin; 1962163953Srrs } 1963163953Srrs if ((*stcb == NULL) && to) { 1964163953Srrs /* Yep, lets check */ 1965163953Srrs *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, localep_sa, NULL); 1966163953Srrs if (*stcb == NULL) { 1967163953Srrs /* 1968163953Srrs * We should have only got back the same inp. If we 1969163953Srrs * got back a different ep we have a problem. The 1970163953Srrs * original findep got back l_inp and now 1971163953Srrs */ 1972163953Srrs if (l_inp != *inp_p) { 1973163953Srrs printf("Bad problem find_ep got a diff inp then special_locate?\n"); 1974163953Srrs } 1975163953Srrs } 1976163953Srrs } 1977163953Srrs cookie_len -= SCTP_SIGNATURE_SIZE; 1978163953Srrs if (*stcb == NULL) { 1979163953Srrs /* this is the "normal" case... get a new TCB */ 1980163953Srrs *stcb = sctp_process_cookie_new(m, iphlen, offset, sh, cookie, 1981163953Srrs cookie_len, *inp_p, netp, to, ¬ification, 1982163953Srrs auth_skipped, auth_offset, auth_len); 1983163953Srrs } else { 1984163953Srrs /* this is abnormal... cookie-echo on existing TCB */ 1985163953Srrs had_a_existing_tcb = 1; 1986163953Srrs *stcb = sctp_process_cookie_existing(m, iphlen, offset, sh, 1987163953Srrs cookie, cookie_len, *inp_p, *stcb, *netp, to, ¬ification, 1988163953Srrs &sac_restart_id); 1989163953Srrs } 1990163953Srrs 1991163953Srrs if (*stcb == NULL) { 1992163953Srrs /* still no TCB... must be bad cookie-echo */ 1993163953Srrs return (NULL); 1994163953Srrs } 1995163953Srrs /* 1996163953Srrs * Ok, we built an association so confirm the address we sent the 1997163953Srrs * INIT-ACK to. 1998163953Srrs */ 1999163953Srrs netl = sctp_findnet(*stcb, to); 2000163953Srrs /* 2001163953Srrs * This code should in theory NOT run but 2002163953Srrs */ 2003163953Srrs if (netl == NULL) { 2004163953Srrs /* TSNH! Huh, why do I need to add this address here? */ 2005163953Srrs int ret; 2006163953Srrs 2007163953Srrs ret = sctp_add_remote_addr(*stcb, to, 0, 100); 2008163953Srrs netl = sctp_findnet(*stcb, to); 2009163953Srrs } 2010163953Srrs if (netl) { 2011163953Srrs if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) { 2012163953Srrs netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 2013163953Srrs sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL, 2014163953Srrs netl); 2015163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 2016163953Srrs (*stcb), 0, (void *)netl); 2017163953Srrs } 2018163953Srrs } 2019163953Srrs if (*stcb) { 2020163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, *inp_p, 2021163953Srrs *stcb, NULL); 2022163953Srrs } 2023163953Srrs if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 2024163953Srrs if (!had_a_existing_tcb || 2025163953Srrs (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 2026163953Srrs /* 2027163953Srrs * If we have a NEW cookie or the connect never 2028163953Srrs * reached the connected state during collision we 2029163953Srrs * must do the TCP accept thing. 2030163953Srrs */ 2031163953Srrs struct socket *so, *oso; 2032163953Srrs struct sctp_inpcb *inp; 2033163953Srrs 2034163953Srrs if (notification == SCTP_NOTIFY_ASSOC_RESTART) { 2035163953Srrs /* 2036163953Srrs * For a restart we will keep the same 2037163953Srrs * socket, no need to do anything. I THINK!! 2038163953Srrs */ 2039163953Srrs sctp_ulp_notify(notification, *stcb, 0, (void *)&sac_restart_id); 2040163953Srrs return (m); 2041163953Srrs } 2042163953Srrs oso = (*inp_p)->sctp_socket; 2043163953Srrs /* 2044163953Srrs * We do this to keep the sockets side happy durin 2045163953Srrs * the sonewcon ONLY. 2046163953Srrs */ 2047163953Srrs NET_LOCK_GIANT(); 2048163953Srrs SCTP_TCB_UNLOCK((*stcb)); 2049163953Srrs so = sonewconn(oso, SS_ISCONNECTED 2050163953Srrs ); 2051163953Srrs NET_UNLOCK_GIANT(); 2052163953Srrs SCTP_INP_WLOCK((*stcb)->sctp_ep); 2053163953Srrs SCTP_TCB_LOCK((*stcb)); 2054163953Srrs SCTP_INP_WUNLOCK((*stcb)->sctp_ep); 2055163953Srrs if (so == NULL) { 2056163953Srrs struct mbuf *op_err; 2057163953Srrs 2058163953Srrs /* Too many sockets */ 2059163953Srrs#ifdef SCTP_DEBUG 2060163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 2061163953Srrs printf("process_cookie_new: no room for another socket!\n"); 2062163953Srrs } 2063163953Srrs#endif /* SCTP_DEBUG */ 2064163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 2065163953Srrs sctp_abort_association(*inp_p, NULL, m, iphlen, 2066163953Srrs sh, op_err); 2067163953Srrs sctp_free_assoc(*inp_p, *stcb, 0); 2068163953Srrs return (NULL); 2069163953Srrs } 2070163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 2071163953Srrs inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2072163953Srrs SCTP_PCB_FLAGS_CONNECTED | 2073163953Srrs SCTP_PCB_FLAGS_IN_TCPPOOL | 2074163953Srrs (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) | 2075163953Srrs SCTP_PCB_FLAGS_DONT_WAKE); 2076163953Srrs inp->sctp_features = (*inp_p)->sctp_features; 2077163953Srrs inp->sctp_socket = so; 2078163953Srrs inp->sctp_frag_point = (*inp_p)->sctp_frag_point; 2079163953Srrs inp->partial_delivery_point = (*inp_p)->partial_delivery_point; 2080163953Srrs inp->sctp_context = (*inp_p)->sctp_context; 2081163953Srrs inp->inp_starting_point_for_iterator = NULL; 2082163953Srrs /* 2083163953Srrs * copy in the authentication parameters from the 2084163953Srrs * original endpoint 2085163953Srrs */ 2086163953Srrs if (inp->sctp_ep.local_hmacs) 2087163953Srrs sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2088163953Srrs inp->sctp_ep.local_hmacs = 2089163953Srrs sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs); 2090163953Srrs if (inp->sctp_ep.local_auth_chunks) 2091163953Srrs sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2092163953Srrs inp->sctp_ep.local_auth_chunks = 2093163953Srrs sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks); 2094163953Srrs (void)sctp_copy_skeylist(&(*inp_p)->sctp_ep.shared_keys, 2095163953Srrs &inp->sctp_ep.shared_keys); 2096163953Srrs 2097163953Srrs /* 2098163953Srrs * Now we must move it from one hash table to 2099163953Srrs * another and get the tcb in the right place. 2100163953Srrs */ 2101163953Srrs sctp_move_pcb_and_assoc(*inp_p, inp, *stcb); 2102163953Srrs 2103163953Srrs sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb); 2104163953Srrs 2105163953Srrs /* Switch over to the new guy */ 2106163953Srrs *inp_p = inp; 2107163953Srrs 2108163953Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2109163953Srrs return (m); 2110163953Srrs } 2111163953Srrs } 2112163953Srrs if ((notification) && ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) { 2113163953Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2114163953Srrs } 2115163953Srrs return (m); 2116163953Srrs} 2117163953Srrs 2118163953Srrsstatic void 2119163953Srrssctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp, 2120163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2121163953Srrs{ 2122163953Srrs /* cp must not be used, others call this without a c-ack :-) */ 2123163953Srrs struct sctp_association *asoc; 2124163953Srrs 2125163953Srrs#ifdef SCTP_DEBUG 2126163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2127163953Srrs printf("sctp_handle_cookie_ack: handling COOKIE-ACK\n"); 2128163953Srrs } 2129163953Srrs#endif 2130163953Srrs if (stcb == NULL) 2131163953Srrs return; 2132163953Srrs 2133163953Srrs asoc = &stcb->asoc; 2134163953Srrs 2135163953Srrs sctp_stop_all_cookie_timers(stcb); 2136163953Srrs /* process according to association state */ 2137163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 2138163953Srrs /* state change only needed when I am in right state */ 2139163953Srrs#ifdef SCTP_DEBUG 2140163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2141163953Srrs printf("moving to OPEN state\n"); 2142163953Srrs } 2143163953Srrs#endif 2144163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 2145163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 2146163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 2147163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 2148163953Srrs 2149163953Srrs } else { 2150163953Srrs asoc->state = SCTP_STATE_OPEN; 2151163953Srrs } 2152163953Srrs /* update RTO */ 2153163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 2154163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 2155163953Srrs if (asoc->overall_error_count == 0) { 2156163953Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, 2157163953Srrs &asoc->time_entered); 2158163953Srrs } 2159163953Srrs SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 2160163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL); 2161163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 2162163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 2163163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 2164163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 2165163953Srrs } 2166163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 2167163953Srrs stcb, net); 2168163953Srrs /* 2169163953Srrs * since we did not send a HB make sure we don't double 2170163953Srrs * things 2171163953Srrs */ 2172163953Srrs net->hb_responded = 1; 2173163953Srrs 2174163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 2175163953Srrs sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) { 2176163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 2177163953Srrs stcb->sctp_ep, stcb, NULL); 2178163953Srrs } 2179163953Srrs /* 2180163953Srrs * set ASCONF timer if ASCONFs are pending and allowed (eg. 2181163953Srrs * addresses changed when init/cookie echo in flight) 2182163953Srrs */ 2183163953Srrs if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) && 2184163953Srrs (stcb->asoc.peer_supports_asconf) && 2185163953Srrs (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) { 2186163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2187163953Srrs stcb->sctp_ep, stcb, 2188163953Srrs stcb->asoc.primary_destination); 2189163953Srrs } 2190163953Srrs } 2191163953Srrs /* Toss the cookie if I can */ 2192163953Srrs sctp_toss_old_cookies(stcb, asoc); 2193163953Srrs if (!TAILQ_EMPTY(&asoc->sent_queue)) { 2194163953Srrs /* Restart the timer if we have pending data */ 2195163953Srrs struct sctp_tmit_chunk *chk; 2196163953Srrs 2197163953Srrs chk = TAILQ_FIRST(&asoc->sent_queue); 2198163953Srrs if (chk) { 2199163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2200163953Srrs stcb, chk->whoTo); 2201163953Srrs } 2202163953Srrs } 2203163953Srrs} 2204163953Srrs 2205163953Srrsstatic void 2206163953Srrssctp_handle_ecn_echo(struct sctp_ecne_chunk *cp, 2207163953Srrs struct sctp_tcb *stcb) 2208163953Srrs{ 2209163953Srrs struct sctp_nets *net; 2210163953Srrs struct sctp_tmit_chunk *lchk; 2211163953Srrs uint32_t tsn; 2212163953Srrs 2213163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_ecne_chunk)) { 2214163953Srrs return; 2215163953Srrs } 2216163953Srrs SCTP_STAT_INCR(sctps_recvecne); 2217163953Srrs tsn = ntohl(cp->tsn); 2218163953Srrs /* ECN Nonce stuff: need a resync and disable the nonce sum check */ 2219163953Srrs /* Also we make sure we disable the nonce_wait */ 2220163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.send_queue); 2221163953Srrs if (lchk == NULL) { 2222163953Srrs stcb->asoc.nonce_resync_tsn = stcb->asoc.sending_seq; 2223163953Srrs } else { 2224163953Srrs stcb->asoc.nonce_resync_tsn = lchk->rec.data.TSN_seq; 2225163953Srrs } 2226163953Srrs stcb->asoc.nonce_wait_for_ecne = 0; 2227163953Srrs stcb->asoc.nonce_sum_check = 0; 2228163953Srrs 2229163953Srrs /* Find where it was sent, if possible */ 2230163953Srrs net = NULL; 2231163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.sent_queue); 2232163953Srrs while (lchk) { 2233163953Srrs if (lchk->rec.data.TSN_seq == tsn) { 2234163953Srrs net = lchk->whoTo; 2235163953Srrs break; 2236163953Srrs } 2237163953Srrs if (compare_with_wrap(lchk->rec.data.TSN_seq, tsn, MAX_SEQ)) 2238163953Srrs break; 2239163953Srrs lchk = TAILQ_NEXT(lchk, sctp_next); 2240163953Srrs } 2241163953Srrs if (net == NULL) 2242163953Srrs /* default is we use the primary */ 2243163953Srrs net = stcb->asoc.primary_destination; 2244163953Srrs 2245163953Srrs if (compare_with_wrap(tsn, stcb->asoc.last_cwr_tsn, MAX_TSN)) { 2246163953Srrs#ifdef SCTP_CWND_MONITOR 2247163953Srrs int old_cwnd; 2248163953Srrs 2249163953Srrs old_cwnd = net->cwnd; 2250163953Srrs#endif 2251163953Srrs SCTP_STAT_INCR(sctps_ecnereducedcwnd); 2252163953Srrs net->ssthresh = net->cwnd / 2; 2253163953Srrs if (net->ssthresh < net->mtu) { 2254163953Srrs net->ssthresh = net->mtu; 2255163953Srrs /* here back off the timer as well, to slow us down */ 2256163953Srrs net->RTO <<= 2; 2257163953Srrs } 2258163953Srrs net->cwnd = net->ssthresh; 2259163953Srrs#ifdef SCTP_CWND_MONITOR 2260163953Srrs sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_SAT); 2261163953Srrs#endif 2262163953Srrs /* 2263163953Srrs * we reduce once every RTT. So we will only lower cwnd at 2264163953Srrs * the next sending seq i.e. the resync_tsn. 2265163953Srrs */ 2266163953Srrs stcb->asoc.last_cwr_tsn = stcb->asoc.nonce_resync_tsn; 2267163953Srrs } 2268163953Srrs /* 2269163953Srrs * We always send a CWR this way if our previous one was lost our 2270163953Srrs * peer will get an update, or if it is not time again to reduce we 2271163953Srrs * still get the cwr to the peer. 2272163953Srrs */ 2273163953Srrs sctp_send_cwr(stcb, net, tsn); 2274163953Srrs} 2275163953Srrs 2276163953Srrsstatic void 2277163953Srrssctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb) 2278163953Srrs{ 2279163953Srrs /* 2280163953Srrs * Here we get a CWR from the peer. We must look in the outqueue and 2281163953Srrs * make sure that we have a covered ECNE in teh control chunk part. 2282163953Srrs * If so remove it. 2283163953Srrs */ 2284163953Srrs struct sctp_tmit_chunk *chk; 2285163953Srrs struct sctp_ecne_chunk *ecne; 2286163953Srrs 2287163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 2288163953Srrs if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) { 2289163953Srrs continue; 2290163953Srrs } 2291163953Srrs /* 2292163953Srrs * Look for and remove if it is the right TSN. Since there 2293163953Srrs * is only ONE ECNE on the control queue at any one time we 2294163953Srrs * don't need to worry about more than one! 2295163953Srrs */ 2296163953Srrs ecne = mtod(chk->data, struct sctp_ecne_chunk *); 2297163953Srrs if (compare_with_wrap(ntohl(cp->tsn), ntohl(ecne->tsn), 2298163953Srrs MAX_TSN) || (cp->tsn == ecne->tsn)) { 2299163953Srrs /* this covers this ECNE, we can remove it */ 2300163953Srrs stcb->asoc.ecn_echo_cnt_onq--; 2301163953Srrs TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, 2302163953Srrs sctp_next); 2303163953Srrs if (chk->data) { 2304163953Srrs sctp_m_freem(chk->data); 2305163953Srrs chk->data = NULL; 2306163953Srrs } 2307163953Srrs stcb->asoc.ctrl_queue_cnt--; 2308163953Srrs sctp_free_remote_addr(chk->whoTo); 2309163953Srrs sctp_free_a_chunk(stcb, chk); 2310163953Srrs break; 2311163953Srrs } 2312163953Srrs } 2313163953Srrs} 2314163953Srrs 2315163953Srrsstatic void 2316163953Srrssctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp, 2317163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2318163953Srrs{ 2319163953Srrs struct sctp_association *asoc; 2320163953Srrs 2321163953Srrs#ifdef SCTP_DEBUG 2322163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 2323163953Srrs printf("sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n"); 2324163953Srrs } 2325163953Srrs#endif 2326163953Srrs if (stcb == NULL) 2327163953Srrs return; 2328163953Srrs 2329163953Srrs asoc = &stcb->asoc; 2330163953Srrs /* process according to association state */ 2331163953Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) { 2332163953Srrs /* unexpected SHUTDOWN-COMPLETE... so ignore... */ 2333163953Srrs SCTP_TCB_UNLOCK(stcb); 2334163953Srrs return; 2335163953Srrs } 2336163953Srrs /* notify upper layer protocol */ 2337163953Srrs if (stcb->sctp_socket) { 2338163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 2339163953Srrs /* are the queues empty? they should be */ 2340163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 2341163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 2342163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 2343163953Srrs sctp_report_all_outbound(stcb); 2344163953Srrs } 2345163953Srrs } 2346163953Srrs /* stop the timer */ 2347163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net); 2348163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 2349163953Srrs /* free the TCB */ 2350163953Srrs sctp_free_assoc(stcb->sctp_ep, stcb, 0); 2351163953Srrs return; 2352163953Srrs} 2353163953Srrs 2354163953Srrsstatic int 2355163953Srrsprocess_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc, 2356163953Srrs struct sctp_nets *net, uint8_t flg) 2357163953Srrs{ 2358163953Srrs switch (desc->chunk_type) { 2359163953Srrs case SCTP_DATA: 2360163953Srrs /* find the tsn to resend (possibly */ 2361163953Srrs { 2362163953Srrs uint32_t tsn; 2363163953Srrs struct sctp_tmit_chunk *tp1; 2364163953Srrs 2365163953Srrs tsn = ntohl(desc->tsn_ifany); 2366163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2367163953Srrs while (tp1) { 2368163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2369163953Srrs /* found it */ 2370163953Srrs break; 2371163953Srrs } 2372163953Srrs if (compare_with_wrap(tp1->rec.data.TSN_seq, tsn, 2373163953Srrs MAX_TSN)) { 2374163953Srrs /* not found */ 2375163953Srrs tp1 = NULL; 2376163953Srrs break; 2377163953Srrs } 2378163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2379163953Srrs } 2380163953Srrs if (tp1 == NULL) { 2381163953Srrs /* 2382163953Srrs * Do it the other way , aka without paying 2383163953Srrs * attention to queue seq order. 2384163953Srrs */ 2385163953Srrs SCTP_STAT_INCR(sctps_pdrpdnfnd); 2386163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2387163953Srrs while (tp1) { 2388163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2389163953Srrs /* found it */ 2390163953Srrs break; 2391163953Srrs } 2392163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2393163953Srrs } 2394163953Srrs } 2395163953Srrs if (tp1 == NULL) { 2396163953Srrs SCTP_STAT_INCR(sctps_pdrptsnnf); 2397163953Srrs } 2398163953Srrs if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) { 2399163953Srrs uint8_t *ddp; 2400163953Srrs 2401163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 2402163953Srrs ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) { 2403163953Srrs SCTP_STAT_INCR(sctps_pdrpdiwnp); 2404163953Srrs return (0); 2405163953Srrs } 2406163953Srrs if (stcb->asoc.peers_rwnd == 0 && 2407163953Srrs (flg & SCTP_FROM_MIDDLE_BOX)) { 2408163953Srrs SCTP_STAT_INCR(sctps_pdrpdizrw); 2409163953Srrs return (0); 2410163953Srrs } 2411163953Srrs ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+ 2412163953Srrs sizeof(struct sctp_data_chunk)); 2413163953Srrs { 2414163953Srrs unsigned int iii; 2415163953Srrs 2416163953Srrs for (iii = 0; iii < sizeof(desc->data_bytes); 2417163953Srrs iii++) { 2418163953Srrs if (ddp[iii] != desc->data_bytes[iii]) { 2419163953Srrs SCTP_STAT_INCR(sctps_pdrpbadd); 2420163953Srrs return (-1); 2421163953Srrs } 2422163953Srrs } 2423163953Srrs } 2424163953Srrs /* 2425163953Srrs * We zero out the nonce so resync not 2426163953Srrs * needed 2427163953Srrs */ 2428163953Srrs tp1->rec.data.ect_nonce = 0; 2429163953Srrs 2430163953Srrs if (tp1->do_rtt) { 2431163953Srrs /* 2432163953Srrs * this guy had a RTO calculation 2433163953Srrs * pending on it, cancel it 2434163953Srrs */ 2435163953Srrs tp1->whoTo->rto_pending = 0; 2436163953Srrs tp1->do_rtt = 0; 2437163953Srrs } 2438163953Srrs SCTP_STAT_INCR(sctps_pdrpmark); 2439163953Srrs if (tp1->sent != SCTP_DATAGRAM_RESEND) 2440163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2441163953Srrs tp1->sent = SCTP_DATAGRAM_RESEND; 2442163953Srrs /* 2443163953Srrs * mark it as if we were doing a FR, since 2444163953Srrs * we will be getting gap ack reports behind 2445163953Srrs * the info from the router. 2446163953Srrs */ 2447163953Srrs tp1->rec.data.doing_fast_retransmit = 1; 2448163953Srrs /* 2449163953Srrs * mark the tsn with what sequences can 2450163953Srrs * cause a new FR. 2451163953Srrs */ 2452163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 2453163953Srrs tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 2454163953Srrs } else { 2455163953Srrs tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 2456163953Srrs } 2457163953Srrs 2458163953Srrs /* restart the timer */ 2459163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2460163953Srrs stcb, tp1->whoTo); 2461163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2462163953Srrs stcb, tp1->whoTo); 2463163953Srrs 2464163953Srrs /* fix counts and things */ 2465163953Srrs if (tp1->whoTo->flight_size >= tp1->book_size) 2466163953Srrs tp1->whoTo->flight_size -= tp1->book_size; 2467163953Srrs else 2468163953Srrs tp1->whoTo->flight_size = 0; 2469163953Srrs 2470163953Srrs if (stcb->asoc.total_flight >= tp1->book_size) { 2471163953Srrs stcb->asoc.total_flight -= tp1->book_size; 2472163953Srrs if (stcb->asoc.total_flight_count > 0) 2473163953Srrs stcb->asoc.total_flight_count--; 2474163953Srrs } else { 2475163953Srrs stcb->asoc.total_flight = 0; 2476163953Srrs stcb->asoc.total_flight_count = 0; 2477163953Srrs } 2478163953Srrs tp1->snd_count--; 2479163953Srrs } { 2480163953Srrs /* audit code */ 2481163953Srrs unsigned int audit; 2482163953Srrs 2483163953Srrs audit = 0; 2484163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) { 2485163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2486163953Srrs audit++; 2487163953Srrs } 2488163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue, 2489163953Srrs sctp_next) { 2490163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2491163953Srrs audit++; 2492163953Srrs } 2493163953Srrs if (audit != stcb->asoc.sent_queue_retran_cnt) { 2494163953Srrs printf("**Local Audit finds cnt:%d asoc cnt:%d\n", 2495163953Srrs audit, stcb->asoc.sent_queue_retran_cnt); 2496163953Srrs#ifndef SCTP_AUDITING_ENABLED 2497163953Srrs stcb->asoc.sent_queue_retran_cnt = audit; 2498163953Srrs#endif 2499163953Srrs } 2500163953Srrs } 2501163953Srrs } 2502163953Srrs break; 2503163953Srrs case SCTP_ASCONF: 2504163953Srrs { 2505163953Srrs struct sctp_tmit_chunk *asconf; 2506163953Srrs 2507163953Srrs TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue, 2508163953Srrs sctp_next) { 2509163953Srrs if (asconf->rec.chunk_id.id == SCTP_ASCONF) { 2510163953Srrs break; 2511163953Srrs } 2512163953Srrs } 2513163953Srrs if (asconf) { 2514163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 2515163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2516163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 2517163953Srrs asconf->snd_count--; 2518163953Srrs } 2519163953Srrs } 2520163953Srrs break; 2521163953Srrs case SCTP_INITIATION: 2522163953Srrs /* resend the INIT */ 2523163953Srrs stcb->asoc.dropped_special_cnt++; 2524163953Srrs if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) { 2525163953Srrs /* 2526163953Srrs * If we can get it in, in a few attempts we do 2527163953Srrs * this, otherwise we let the timer fire. 2528163953Srrs */ 2529163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, 2530163953Srrs stcb, net); 2531163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 2532163953Srrs } 2533163953Srrs break; 2534163953Srrs case SCTP_SELECTIVE_ACK: 2535163953Srrs /* resend the sack */ 2536163953Srrs sctp_send_sack(stcb); 2537163953Srrs break; 2538163953Srrs case SCTP_HEARTBEAT_REQUEST: 2539163953Srrs /* resend a demand HB */ 2540163953Srrs sctp_send_hb(stcb, 1, net); 2541163953Srrs break; 2542163953Srrs case SCTP_SHUTDOWN: 2543163953Srrs sctp_send_shutdown(stcb, net); 2544163953Srrs break; 2545163953Srrs case SCTP_SHUTDOWN_ACK: 2546163953Srrs sctp_send_shutdown_ack(stcb, net); 2547163953Srrs break; 2548163953Srrs case SCTP_COOKIE_ECHO: 2549163953Srrs { 2550163953Srrs struct sctp_tmit_chunk *cookie; 2551163953Srrs 2552163953Srrs cookie = NULL; 2553163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, 2554163953Srrs sctp_next) { 2555163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 2556163953Srrs break; 2557163953Srrs } 2558163953Srrs } 2559163953Srrs if (cookie) { 2560163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) 2561163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2562163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 2563163953Srrs sctp_stop_all_cookie_timers(stcb); 2564163953Srrs } 2565163953Srrs } 2566163953Srrs break; 2567163953Srrs case SCTP_COOKIE_ACK: 2568163953Srrs sctp_send_cookie_ack(stcb); 2569163953Srrs break; 2570163953Srrs case SCTP_ASCONF_ACK: 2571163953Srrs /* resend last asconf ack */ 2572163953Srrs sctp_send_asconf_ack(stcb, 1); 2573163953Srrs break; 2574163953Srrs case SCTP_FORWARD_CUM_TSN: 2575163953Srrs send_forward_tsn(stcb, &stcb->asoc); 2576163953Srrs break; 2577163953Srrs /* can't do anything with these */ 2578163953Srrs case SCTP_PACKET_DROPPED: 2579163953Srrs case SCTP_INITIATION_ACK: /* this should not happen */ 2580163953Srrs case SCTP_HEARTBEAT_ACK: 2581163953Srrs case SCTP_ABORT_ASSOCIATION: 2582163953Srrs case SCTP_OPERATION_ERROR: 2583163953Srrs case SCTP_SHUTDOWN_COMPLETE: 2584163953Srrs case SCTP_ECN_ECHO: 2585163953Srrs case SCTP_ECN_CWR: 2586163953Srrs default: 2587163953Srrs break; 2588163953Srrs } 2589163953Srrs return (0); 2590163953Srrs} 2591163953Srrs 2592163953Srrsvoid 2593163953Srrssctp_reset_in_stream(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2594163953Srrs{ 2595163953Srrs int i; 2596163953Srrs uint16_t temp; 2597163953Srrs 2598163953Srrs /* 2599163953Srrs * We set things to 0xffff since this is the last delivered sequence 2600163953Srrs * and we will be sending in 0 after the reset. 2601163953Srrs */ 2602163953Srrs 2603163953Srrs if (number_entries) { 2604163953Srrs for (i = 0; i < number_entries; i++) { 2605163953Srrs temp = ntohs(list[i]); 2606163953Srrs if (temp >= stcb->asoc.streamincnt) { 2607163953Srrs continue; 2608163953Srrs } 2609163953Srrs stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff; 2610163953Srrs } 2611163953Srrs } else { 2612163953Srrs list = NULL; 2613163953Srrs for (i = 0; i < stcb->asoc.streamincnt; i++) { 2614163953Srrs stcb->asoc.strmin[i].last_sequence_delivered = 0xffff; 2615163953Srrs } 2616163953Srrs } 2617163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list); 2618163953Srrs} 2619163953Srrs 2620163953Srrsstatic void 2621163953Srrssctp_reset_out_streams(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2622163953Srrs{ 2623163953Srrs int i; 2624163953Srrs 2625163953Srrs if (number_entries == 0) { 2626163953Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 2627163953Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 2628163953Srrs } 2629163953Srrs } else if (number_entries) { 2630163953Srrs for (i = 0; i < number_entries; i++) { 2631163953Srrs uint16_t temp; 2632163953Srrs 2633163953Srrs temp = ntohs(list[i]); 2634163953Srrs if (temp >= stcb->asoc.streamoutcnt) { 2635163953Srrs /* no such stream */ 2636163953Srrs continue; 2637163953Srrs } 2638163953Srrs stcb->asoc.strmout[temp].next_sequence_sent = 0; 2639163953Srrs } 2640163953Srrs } 2641163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list); 2642163953Srrs} 2643163953Srrs 2644163953Srrs 2645163953Srrsstruct sctp_stream_reset_out_request * 2646163953Srrssctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk) 2647163953Srrs{ 2648163953Srrs struct sctp_association *asoc; 2649163953Srrs struct sctp_stream_reset_out_req *req; 2650163953Srrs struct sctp_stream_reset_out_request *r; 2651163953Srrs struct sctp_tmit_chunk *chk; 2652163953Srrs int len, clen; 2653163953Srrs 2654163953Srrs asoc = &stcb->asoc; 2655163953Srrs if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 2656163953Srrs return (NULL); 2657163953Srrs } 2658163953Srrs if (stcb->asoc.str_reset == NULL) { 2659163953Srrs return (NULL); 2660163953Srrs } 2661163953Srrs chk = stcb->asoc.str_reset; 2662163953Srrs if (chk->data == NULL) { 2663163953Srrs return (NULL); 2664163953Srrs } 2665163953Srrs if (bchk) { 2666163953Srrs /* he wants a copy of the chk pointer */ 2667163953Srrs *bchk = chk; 2668163953Srrs } 2669163953Srrs clen = chk->send_size; 2670163953Srrs req = mtod(chk->data, struct sctp_stream_reset_out_req *); 2671163953Srrs r = &req->sr_req; 2672163953Srrs if (ntohl(r->request_seq) == seq) { 2673163953Srrs /* found it */ 2674163953Srrs return (r); 2675163953Srrs } 2676163953Srrs len = SCTP_SIZE32(ntohs(r->ph.param_length)); 2677163953Srrs if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) { 2678163953Srrs /* move to the next one, there can only be a max of two */ 2679163953Srrs r = (struct sctp_stream_reset_out_request *)((caddr_t)r + len); 2680163953Srrs if (ntohl(r->request_seq) == seq) { 2681163953Srrs return (r); 2682163953Srrs } 2683163953Srrs } 2684163953Srrs /* that seq is not here */ 2685163953Srrs return (NULL); 2686163953Srrs} 2687163953Srrs 2688163953Srrsstatic void 2689163953Srrssctp_clean_up_stream_reset(struct sctp_tcb *stcb) 2690163953Srrs{ 2691163953Srrs struct sctp_association *asoc; 2692163953Srrs 2693163953Srrs asoc = &stcb->asoc; 2694163953Srrs struct sctp_tmit_chunk *chk = stcb->asoc.str_reset; 2695163953Srrs 2696163953Srrs if (stcb->asoc.str_reset == NULL) { 2697163953Srrs return; 2698163953Srrs } 2699163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 2700163953Srrs TAILQ_REMOVE(&asoc->control_send_queue, 2701163953Srrs chk, 2702163953Srrs sctp_next); 2703163953Srrs if (chk->data) { 2704163953Srrs sctp_m_freem(chk->data); 2705163953Srrs chk->data = NULL; 2706163953Srrs } 2707163953Srrs asoc->ctrl_queue_cnt--; 2708163953Srrs sctp_free_remote_addr(chk->whoTo); 2709163953Srrs 2710163953Srrs sctp_free_a_chunk(stcb, chk); 2711163953Srrs stcb->asoc.str_reset = NULL; 2712163953Srrs} 2713163953Srrs 2714163953Srrs 2715163953Srrsstatic int 2716163953Srrssctp_handle_stream_reset_response(struct sctp_tcb *stcb, 2717163953Srrs uint32_t seq, uint32_t action, 2718163953Srrs struct sctp_stream_reset_response *respin 2719163953Srrs) 2720163953Srrs{ 2721163953Srrs uint16_t type; 2722163953Srrs int lparm_len; 2723163953Srrs struct sctp_association *asoc = &stcb->asoc; 2724163953Srrs struct sctp_tmit_chunk *chk; 2725163953Srrs struct sctp_stream_reset_out_request *srparam; 2726163953Srrs int number_entries; 2727163953Srrs 2728163953Srrs if (asoc->stream_reset_outstanding == 0) { 2729163953Srrs /* duplicate */ 2730163953Srrs return (0); 2731163953Srrs } 2732163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 2733163953Srrs srparam = sctp_find_stream_reset(stcb, seq, &chk); 2734163953Srrs if (srparam) { 2735163953Srrs stcb->asoc.str_reset_seq_out++; 2736163953Srrs type = ntohs(srparam->ph.param_type); 2737163953Srrs lparm_len = ntohs(srparam->ph.param_length); 2738163953Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t); 2739163953Srrs if (type == SCTP_STR_RESET_OUT_REQUEST) { 2740163953Srrs asoc->stream_reset_out_is_outstanding = 0; 2741163953Srrs if (asoc->stream_reset_outstanding) 2742163953Srrs asoc->stream_reset_outstanding--; 2743163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2744163953Srrs /* do it */ 2745163953Srrs sctp_reset_out_streams(stcb, number_entries, srparam->list_of_streams); 2746163953Srrs } else { 2747163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, srparam->list_of_streams); 2748163953Srrs } 2749163953Srrs } else if (type == SCTP_STR_RESET_IN_REQUEST) { 2750163953Srrs /* Answered my request */ 2751163953Srrs if (asoc->stream_reset_outstanding) 2752163953Srrs asoc->stream_reset_outstanding--; 2753163953Srrs if (action != SCTP_STREAM_RESET_PERFORMED) { 2754163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb, number_entries, srparam->list_of_streams); 2755163953Srrs } 2756163953Srrs } else if (type == SCTP_STR_RESET_TSN_REQUEST) { 2757163953Srrs /** 2758163953Srrs * a) Adopt the new in tsn. 2759163953Srrs * b) reset the map 2760163953Srrs * c) Adopt the new out-tsn 2761163953Srrs */ 2762163953Srrs struct sctp_stream_reset_response_tsn *resp; 2763163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2764163953Srrs int abort_flag = 0; 2765163953Srrs 2766163953Srrs if (respin == NULL) { 2767163953Srrs /* huh ? */ 2768163953Srrs return (0); 2769163953Srrs } 2770163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2771163953Srrs resp = (struct sctp_stream_reset_response_tsn *)respin; 2772163953Srrs asoc->stream_reset_outstanding--; 2773163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 2774163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 2775163953Srrs fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1); 2776163953Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag); 2777163953Srrs if (abort_flag) { 2778163953Srrs return (1); 2779163953Srrs } 2780163953Srrs stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1); 2781163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 2782163953Srrs stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn); 2783163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 2784163953Srrs stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn); 2785163953Srrs stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn; 2786163953Srrs 2787163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 2788163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 2789163953Srrs 2790163953Srrs } 2791163953Srrs } 2792163953Srrs /* get rid of the request and get the request flags */ 2793163953Srrs if (asoc->stream_reset_outstanding == 0) { 2794163953Srrs sctp_clean_up_stream_reset(stcb); 2795163953Srrs } 2796163953Srrs } 2797163953Srrs } 2798163953Srrs return (0); 2799163953Srrs} 2800163953Srrs 2801163953Srrsstatic void 2802163953Srrssctp_handle_str_reset_request_in(struct sctp_tcb *stcb, 2803163953Srrs struct sctp_tmit_chunk *chk, 2804163953Srrs struct sctp_stream_reset_in_request *req) 2805163953Srrs{ 2806163953Srrs uint32_t seq; 2807163953Srrs int len, i; 2808163953Srrs int number_entries; 2809163953Srrs uint16_t temp; 2810163953Srrs 2811163953Srrs /* 2812163953Srrs * peer wants me to send a str-reset to him for my outgoing seq's if 2813163953Srrs * seq_in is right. 2814163953Srrs */ 2815163953Srrs struct sctp_association *asoc = &stcb->asoc; 2816163953Srrs 2817163953Srrs seq = ntohl(req->request_seq); 2818163953Srrs if (asoc->str_reset_seq_in == seq) { 2819163953Srrs if (stcb->asoc.stream_reset_out_is_outstanding == 0) { 2820163953Srrs len = ntohs(req->ph.param_length); 2821163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t)); 2822163953Srrs for (i = 0; i < number_entries; i++) { 2823163953Srrs temp = ntohs(req->list_of_streams[i]); 2824163953Srrs req->list_of_streams[i] = temp; 2825163953Srrs } 2826163953Srrs /* move the reset action back one */ 2827163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2828163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2829163953Srrs sctp_add_stream_reset_out(chk, number_entries, req->list_of_streams, 2830163953Srrs asoc->str_reset_seq_out, 2831163953Srrs seq, (asoc->sending_seq - 1)); 2832163953Srrs asoc->stream_reset_out_is_outstanding = 1; 2833163953Srrs asoc->str_reset = chk; 2834163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 2835163953Srrs stcb->asoc.stream_reset_outstanding++; 2836163953Srrs } else { 2837163953Srrs /* Can't do it, since we have sent one out */ 2838163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2839163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_TRY_LATER; 2840163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2841163953Srrs } 2842163953Srrs asoc->str_reset_seq_in++; 2843163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 2844163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2845163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 2846163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 2847163953Srrs } else { 2848163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2849163953Srrs } 2850163953Srrs} 2851163953Srrs 2852163953Srrsstatic int 2853163953Srrssctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb, 2854163953Srrs struct sctp_tmit_chunk *chk, 2855163953Srrs struct sctp_stream_reset_tsn_request *req) 2856163953Srrs{ 2857163953Srrs /* reset all in and out and update the tsn */ 2858163953Srrs /* 2859163953Srrs * A) reset my str-seq's on in and out. B) Select a receive next, 2860163953Srrs * and set cum-ack to it. Also process this selected number as a 2861163953Srrs * fwd-tsn as well. C) set in the response my next sending seq. 2862163953Srrs */ 2863163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2864163953Srrs struct sctp_association *asoc = &stcb->asoc; 2865163953Srrs int abort_flag = 0; 2866163953Srrs uint32_t seq; 2867163953Srrs 2868163953Srrs seq = ntohl(req->request_seq); 2869163953Srrs if (asoc->str_reset_seq_in == seq) { 2870163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 2871163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 2872163953Srrs fwdtsn.ch.chunk_flags = 0; 2873163953Srrs fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1); 2874163953Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag); 2875163953Srrs if (abort_flag) { 2876163953Srrs return (1); 2877163953Srrs } 2878163953Srrs stcb->asoc.highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA; 2879163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 2880163953Srrs stcb->asoc.mapping_array_base_tsn = stcb->asoc.highest_tsn_inside_map + 1; 2881163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 2882163953Srrs atomic_add_int(&stcb->asoc.sending_seq, 1); 2883163953Srrs /* save off historical data for retrans */ 2884163953Srrs stcb->asoc.last_sending_seq[1] = stcb->asoc.last_sending_seq[0]; 2885163953Srrs stcb->asoc.last_sending_seq[0] = stcb->asoc.sending_seq; 2886163953Srrs stcb->asoc.last_base_tsnsent[1] = stcb->asoc.last_base_tsnsent[0]; 2887163953Srrs stcb->asoc.last_base_tsnsent[0] = stcb->asoc.mapping_array_base_tsn; 2888163953Srrs 2889163953Srrs sctp_add_stream_reset_result_tsn(chk, 2890163953Srrs ntohl(req->request_seq), 2891163953Srrs SCTP_STREAM_RESET_PERFORMED, 2892163953Srrs stcb->asoc.sending_seq, 2893163953Srrs stcb->asoc.mapping_array_base_tsn); 2894163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 2895163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 2896163953Srrs stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0]; 2897163953Srrs stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2898163953Srrs 2899163953Srrs asoc->str_reset_seq_in++; 2900163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 2901163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0], 2902163953Srrs stcb->asoc.last_sending_seq[0], 2903163953Srrs stcb->asoc.last_base_tsnsent[0] 2904163953Srrs ); 2905163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 2906163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1], 2907163953Srrs stcb->asoc.last_sending_seq[1], 2908163953Srrs stcb->asoc.last_base_tsnsent[1] 2909163953Srrs ); 2910163953Srrs } else { 2911163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2912163953Srrs } 2913163953Srrs return (0); 2914163953Srrs} 2915163953Srrs 2916163953Srrsstatic void 2917163953Srrssctp_handle_str_reset_request_out(struct sctp_tcb *stcb, 2918163953Srrs struct sctp_tmit_chunk *chk, 2919163953Srrs struct sctp_stream_reset_out_request *req) 2920163953Srrs{ 2921163953Srrs uint32_t seq, tsn; 2922163953Srrs int number_entries, len; 2923163953Srrs struct sctp_association *asoc = &stcb->asoc; 2924163953Srrs 2925163953Srrs seq = ntohl(req->request_seq); 2926163953Srrs 2927163953Srrs /* now if its not a duplicate we process it */ 2928163953Srrs if (asoc->str_reset_seq_in == seq) { 2929163953Srrs len = ntohs(req->ph.param_length); 2930163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t)); 2931163953Srrs /* 2932163953Srrs * the sender is resetting, handle the list issue.. we must 2933163953Srrs * a) verify if we can do the reset, if so no problem b) If 2934163953Srrs * we can't do the reset we must copy the request. c) queue 2935163953Srrs * it, and setup the data in processor to trigger it off 2936163953Srrs * when needed and dequeue all the queued data. 2937163953Srrs */ 2938163953Srrs tsn = ntohl(req->send_reset_at_tsn); 2939163953Srrs 2940163953Srrs /* move the reset action back one */ 2941163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2942163953Srrs if ((tsn == asoc->cumulative_tsn) || 2943163953Srrs (compare_with_wrap(asoc->cumulative_tsn, tsn, MAX_TSN))) { 2944163953Srrs /* we can do it now */ 2945163953Srrs sctp_reset_in_stream(stcb, number_entries, req->list_of_streams); 2946163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 2947163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2948163953Srrs } else { 2949163953Srrs /* 2950163953Srrs * we must queue it up and thus wait for the TSN's 2951163953Srrs * to arrive that are at or before tsn 2952163953Srrs */ 2953163953Srrs struct sctp_stream_reset_list *liste; 2954163953Srrs int siz; 2955163953Srrs 2956163953Srrs siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t)); 2957163953Srrs SCTP_MALLOC(liste, struct sctp_stream_reset_list *, 2958163953Srrs siz, "StrRstList"); 2959163953Srrs if (liste == NULL) { 2960163953Srrs /* gak out of memory */ 2961163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_DENIED); 2962163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_DENIED; 2963163953Srrs return; 2964163953Srrs } 2965163953Srrs liste->tsn = tsn; 2966163953Srrs liste->number_entries = number_entries; 2967163953Srrs memcpy(&liste->req, req, 2968163953Srrs (sizeof(struct sctp_stream_reset_out_request) + (number_entries * sizeof(uint16_t)))); 2969163953Srrs TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp); 2970163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 2971163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2972163953Srrs } 2973163953Srrs asoc->str_reset_seq_in++; 2974163953Srrs } else if ((asoc->str_reset_seq_in - 1) == seq) { 2975163953Srrs /* 2976163953Srrs * one seq back, just echo back last action since my 2977163953Srrs * response was lost. 2978163953Srrs */ 2979163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2980163953Srrs } else if ((asoc->str_reset_seq_in - 2) == seq) { 2981163953Srrs /* 2982163953Srrs * two seq back, just echo back last action since my 2983163953Srrs * response was lost. 2984163953Srrs */ 2985163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 2986163953Srrs } else { 2987163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2988163953Srrs } 2989163953Srrs} 2990163953Srrs 2991163953Srrsstatic int 2992163953Srrssctp_handle_stream_reset(struct sctp_tcb *stcb, struct sctp_stream_reset_out_req *sr_req) 2993163953Srrs{ 2994163953Srrs int chk_length, param_len, ptype; 2995163953Srrs uint32_t seq; 2996163953Srrs int num_req = 0; 2997163953Srrs struct sctp_tmit_chunk *chk; 2998163953Srrs struct sctp_chunkhdr *ch; 2999163953Srrs struct sctp_paramhdr *ph; 3000163953Srrs 3001163953Srrs /* now it may be a reset or a reset-response */ 3002163953Srrs chk_length = ntohs(sr_req->ch.chunk_length); 3003163953Srrs int ret_code = 0; 3004163953Srrs int num_param = 0; 3005163953Srrs 3006163953Srrs /* setup for adding the response */ 3007163953Srrs sctp_alloc_a_chunk(stcb, chk); 3008163953Srrs if (chk == NULL) { 3009163953Srrs return (ret_code); 3010163953Srrs } 3011163953Srrs chk->rec.chunk_id.id = SCTP_STREAM_RESET; 3012163953Srrs chk->asoc = &stcb->asoc; 3013163953Srrs chk->no_fr_allowed = 0; 3014163953Srrs chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr); 3015163953Srrs chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA); 3016163953Srrs if (chk->data == NULL) { 3017163953Srrsstrres_nochunk: 3018163953Srrs if (chk->data) { 3019163953Srrs sctp_m_freem(chk->data); 3020163953Srrs chk->data = NULL; 3021163953Srrs } 3022163953Srrs sctp_free_a_chunk(stcb, chk); 3023163953Srrs return (ret_code); 3024163953Srrs } 3025163953Srrs chk->data->m_data += SCTP_MIN_OVERHEAD; 3026163953Srrs 3027163953Srrs /* setup chunk parameters */ 3028163953Srrs chk->sent = SCTP_DATAGRAM_UNSENT; 3029163953Srrs chk->snd_count = 0; 3030163953Srrs chk->whoTo = stcb->asoc.primary_destination; 3031163953Srrs atomic_add_int(&chk->whoTo->ref_count, 1); 3032163953Srrs 3033163953Srrs ch = mtod(chk->data, struct sctp_chunkhdr *); 3034163953Srrs ch->chunk_type = SCTP_STREAM_RESET; 3035163953Srrs ch->chunk_flags = 0; 3036163953Srrs ch->chunk_length = htons(chk->send_size); 3037163953Srrs chk->data->m_pkthdr.len = chk->data->m_len = SCTP_SIZE32(chk->send_size); 3038163953Srrs 3039163953Srrs 3040163953Srrs ph = (struct sctp_paramhdr *)&sr_req->sr_req; 3041163953Srrs while ((size_t)chk_length >= sizeof(struct sctp_stream_reset_tsn_request)) { 3042163953Srrs param_len = ntohs(ph->param_length); 3043163953Srrs if (param_len < (int)sizeof(struct sctp_stream_reset_tsn_request)) { 3044163953Srrs /* bad param */ 3045163953Srrs break; 3046163953Srrs } 3047163953Srrs ptype = ntohs(ph->param_type); 3048163953Srrs num_param++; 3049163953Srrs if (num_param > SCTP_MAX_RESET_PARAMS) { 3050163953Srrs /* hit the max of parameters already sorry.. */ 3051163953Srrs break; 3052163953Srrs } 3053163953Srrs if (ptype == SCTP_STR_RESET_OUT_REQUEST) { 3054163953Srrs struct sctp_stream_reset_out_request *req_out; 3055163953Srrs 3056163953Srrs req_out = (struct sctp_stream_reset_out_request *)ph; 3057163953Srrs num_req++; 3058163953Srrs if (stcb->asoc.stream_reset_outstanding) { 3059163953Srrs seq = ntohl(req_out->response_seq); 3060163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 3061163953Srrs /* implicit ack */ 3062163953Srrs sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_PERFORMED, NULL); 3063163953Srrs } 3064163953Srrs } 3065163953Srrs sctp_handle_str_reset_request_out(stcb, chk, req_out); 3066163953Srrs } else if (ptype == SCTP_STR_RESET_IN_REQUEST) { 3067163953Srrs struct sctp_stream_reset_in_request *req_in; 3068163953Srrs 3069163953Srrs num_req++; 3070163953Srrs req_in = (struct sctp_stream_reset_in_request *)ph; 3071163953Srrs sctp_handle_str_reset_request_in(stcb, chk, req_in); 3072163953Srrs } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) { 3073163953Srrs struct sctp_stream_reset_tsn_request *req_tsn; 3074163953Srrs 3075163953Srrs num_req++; 3076163953Srrs req_tsn = (struct sctp_stream_reset_tsn_request *)ph; 3077163953Srrs if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) { 3078163953Srrs ret_code = 1; 3079163953Srrs goto strres_nochunk; 3080163953Srrs } 3081163953Srrs /* no more */ 3082163953Srrs break; 3083163953Srrs } else if (ptype == SCTP_STR_RESET_RESPONSE) { 3084163953Srrs struct sctp_stream_reset_response *resp; 3085163953Srrs uint32_t result; 3086163953Srrs 3087163953Srrs resp = (struct sctp_stream_reset_response *)ph; 3088163953Srrs seq = ntohl(resp->response_seq); 3089163953Srrs result = ntohl(resp->result); 3090163953Srrs if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) { 3091163953Srrs ret_code = 1; 3092163953Srrs goto strres_nochunk; 3093163953Srrs } 3094163953Srrs } else { 3095163953Srrs break; 3096163953Srrs } 3097163953Srrs 3098163953Srrs ph = (struct sctp_paramhdr *)((caddr_t)ph + SCTP_SIZE32(param_len)); 3099163953Srrs chk_length -= SCTP_SIZE32(param_len); 3100163953Srrs } 3101163953Srrs if (num_req == 0) { 3102163953Srrs /* we have no response free the stuff */ 3103163953Srrs goto strres_nochunk; 3104163953Srrs } 3105163953Srrs /* ok we have a chunk to link in */ 3106163953Srrs TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, 3107163953Srrs chk, 3108163953Srrs sctp_next); 3109163953Srrs stcb->asoc.ctrl_queue_cnt++; 3110163953Srrs return (ret_code); 3111163953Srrs} 3112163953Srrs 3113163953Srrs/* 3114163953Srrs * Handle a router or endpoints report of a packet loss, there are two ways 3115163953Srrs * to handle this, either we get the whole packet and must disect it 3116163953Srrs * ourselves (possibly with truncation and or corruption) or it is a summary 3117163953Srrs * from a middle box that did the disectting for us. 3118163953Srrs */ 3119163953Srrsstatic void 3120163953Srrssctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp, 3121163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 3122163953Srrs{ 3123163953Srrs uint32_t bottle_bw, on_queue; 3124163953Srrs uint16_t trunc_len; 3125163953Srrs unsigned int chlen; 3126163953Srrs unsigned int at; 3127163953Srrs struct sctp_chunk_desc desc; 3128163953Srrs struct sctp_chunkhdr *ch; 3129163953Srrs 3130163953Srrs chlen = ntohs(cp->ch.chunk_length); 3131163953Srrs chlen -= sizeof(struct sctp_pktdrop_chunk); 3132163953Srrs /* XXX possible chlen underflow */ 3133163953Srrs if (chlen == 0) { 3134163953Srrs ch = NULL; 3135163953Srrs if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) 3136163953Srrs SCTP_STAT_INCR(sctps_pdrpbwrpt); 3137163953Srrs } else { 3138163953Srrs ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr)); 3139163953Srrs chlen -= sizeof(struct sctphdr); 3140163953Srrs /* XXX possible chlen underflow */ 3141163953Srrs memset(&desc, 0, sizeof(desc)); 3142163953Srrs } 3143163953Srrs trunc_len = (uint16_t) ntohs(cp->trunc_len); 3144163953Srrs /* now the chunks themselves */ 3145163953Srrs while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) { 3146163953Srrs desc.chunk_type = ch->chunk_type; 3147163953Srrs /* get amount we need to move */ 3148163953Srrs at = ntohs(ch->chunk_length); 3149163953Srrs if (at < sizeof(struct sctp_chunkhdr)) { 3150163953Srrs /* corrupt chunk, maybe at the end? */ 3151163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3152163953Srrs break; 3153163953Srrs } 3154163953Srrs if (trunc_len == 0) { 3155163953Srrs /* we are supposed to have all of it */ 3156163953Srrs if (at > chlen) { 3157163953Srrs /* corrupt skip it */ 3158163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3159163953Srrs break; 3160163953Srrs } 3161163953Srrs } else { 3162163953Srrs /* is there enough of it left ? */ 3163163953Srrs if (desc.chunk_type == SCTP_DATA) { 3164163953Srrs if (chlen < (sizeof(struct sctp_data_chunk) + 3165163953Srrs sizeof(desc.data_bytes))) { 3166163953Srrs break; 3167163953Srrs } 3168163953Srrs } else { 3169163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3170163953Srrs break; 3171163953Srrs } 3172163953Srrs } 3173163953Srrs } 3174163953Srrs if (desc.chunk_type == SCTP_DATA) { 3175163953Srrs /* can we get out the tsn? */ 3176163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3177163953Srrs SCTP_STAT_INCR(sctps_pdrpmbda); 3178163953Srrs 3179163953Srrs if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) { 3180163953Srrs /* yep */ 3181163953Srrs struct sctp_data_chunk *dcp; 3182163953Srrs uint8_t *ddp; 3183163953Srrs unsigned int iii; 3184163953Srrs 3185163953Srrs dcp = (struct sctp_data_chunk *)ch; 3186163953Srrs ddp = (uint8_t *) (dcp + 1); 3187163953Srrs for (iii = 0; iii < sizeof(desc.data_bytes); iii++) { 3188163953Srrs desc.data_bytes[iii] = ddp[iii]; 3189163953Srrs } 3190163953Srrs desc.tsn_ifany = dcp->dp.tsn; 3191163953Srrs } else { 3192163953Srrs /* nope we are done. */ 3193163953Srrs SCTP_STAT_INCR(sctps_pdrpnedat); 3194163953Srrs break; 3195163953Srrs } 3196163953Srrs } else { 3197163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3198163953Srrs SCTP_STAT_INCR(sctps_pdrpmbct); 3199163953Srrs } 3200163953Srrs 3201163953Srrs if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) { 3202163953Srrs SCTP_STAT_INCR(sctps_pdrppdbrk); 3203163953Srrs break; 3204163953Srrs } 3205163953Srrs if (SCTP_SIZE32(at) > chlen) { 3206163953Srrs break; 3207163953Srrs } 3208163953Srrs chlen -= SCTP_SIZE32(at); 3209163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3210163953Srrs /* done, none left */ 3211163953Srrs break; 3212163953Srrs } 3213163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at)); 3214163953Srrs } 3215163953Srrs /* Now update any rwnd --- possibly */ 3216163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) { 3217163953Srrs /* From a peer, we get a rwnd report */ 3218163953Srrs uint32_t a_rwnd; 3219163953Srrs 3220163953Srrs SCTP_STAT_INCR(sctps_pdrpfehos); 3221163953Srrs 3222163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3223163953Srrs on_queue = ntohl(cp->current_onq); 3224163953Srrs if (bottle_bw && on_queue) { 3225163953Srrs /* a rwnd report is in here */ 3226163953Srrs if (bottle_bw > on_queue) 3227163953Srrs a_rwnd = bottle_bw - on_queue; 3228163953Srrs else 3229163953Srrs a_rwnd = 0; 3230163953Srrs 3231163953Srrs if (a_rwnd == 0) 3232163953Srrs stcb->asoc.peers_rwnd = 0; 3233163953Srrs else { 3234163953Srrs if (a_rwnd > stcb->asoc.total_flight) { 3235163953Srrs stcb->asoc.peers_rwnd = 3236163953Srrs a_rwnd - stcb->asoc.total_flight; 3237163953Srrs } else { 3238163953Srrs stcb->asoc.peers_rwnd = 0; 3239163953Srrs } 3240163953Srrs if (stcb->asoc.peers_rwnd < 3241163953Srrs stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 3242163953Srrs /* SWS sender side engages */ 3243163953Srrs stcb->asoc.peers_rwnd = 0; 3244163953Srrs } 3245163953Srrs } 3246163953Srrs } 3247163953Srrs } else { 3248163953Srrs SCTP_STAT_INCR(sctps_pdrpfmbox); 3249163953Srrs } 3250163953Srrs 3251163953Srrs /* now middle boxes in sat networks get a cwnd bump */ 3252163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) && 3253163953Srrs (stcb->asoc.sat_t3_loss_recovery == 0) && 3254163953Srrs (stcb->asoc.sat_network)) { 3255163953Srrs /* 3256163953Srrs * This is debateable but for sat networks it makes sense 3257163953Srrs * Note if a T3 timer has went off, we will prohibit any 3258163953Srrs * changes to cwnd until we exit the t3 loss recovery. 3259163953Srrs */ 3260163953Srrs uint32_t bw_avail; 3261163953Srrs int rtt, incr; 3262163953Srrs 3263163953Srrs#ifdef SCTP_CWND_MONITOR 3264163953Srrs int old_cwnd = net->cwnd; 3265163953Srrs 3266163953Srrs#endif 3267163953Srrs /* need real RTT for this calc */ 3268163953Srrs rtt = ((net->lastsa >> 2) + net->lastsv) >> 1; 3269163953Srrs /* get bottle neck bw */ 3270163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3271163953Srrs /* and whats on queue */ 3272163953Srrs on_queue = ntohl(cp->current_onq); 3273163953Srrs /* 3274163953Srrs * adjust the on-queue if our flight is more it could be 3275163953Srrs * that the router has not yet gotten data "in-flight" to it 3276163953Srrs */ 3277163953Srrs if (on_queue < net->flight_size) 3278163953Srrs on_queue = net->flight_size; 3279163953Srrs 3280163953Srrs /* calculate the available space */ 3281163953Srrs bw_avail = (bottle_bw * rtt) / 1000; 3282163953Srrs if (bw_avail > bottle_bw) { 3283163953Srrs /* 3284163953Srrs * Cap the growth to no more than the bottle neck. 3285163953Srrs * This can happen as RTT slides up due to queues. 3286163953Srrs * It also means if you have more than a 1 second 3287163953Srrs * RTT with a empty queue you will be limited to the 3288163953Srrs * bottle_bw per second no matter if other points 3289163953Srrs * have 1/2 the RTT and you could get more out... 3290163953Srrs */ 3291163953Srrs bw_avail = bottle_bw; 3292163953Srrs } 3293163953Srrs if (on_queue > bw_avail) { 3294163953Srrs /* 3295163953Srrs * No room for anything else don't allow anything 3296163953Srrs * else to be "added to the fire". 3297163953Srrs */ 3298163953Srrs int seg_inflight, seg_onqueue, my_portion; 3299163953Srrs 3300163953Srrs net->partial_bytes_acked = 0; 3301163953Srrs 3302163953Srrs /* how much are we over queue size? */ 3303163953Srrs incr = on_queue - bw_avail; 3304163953Srrs if (stcb->asoc.seen_a_sack_this_pkt) { 3305163953Srrs /* 3306163953Srrs * undo any cwnd adjustment that the sack 3307163953Srrs * might have made 3308163953Srrs */ 3309163953Srrs net->cwnd = net->prev_cwnd; 3310163953Srrs } 3311163953Srrs /* Now how much of that is mine? */ 3312163953Srrs seg_inflight = net->flight_size / net->mtu; 3313163953Srrs seg_onqueue = on_queue / net->mtu; 3314163953Srrs my_portion = (incr * seg_inflight) / seg_onqueue; 3315163953Srrs 3316163953Srrs /* Have I made an adjustment already */ 3317163953Srrs if (net->cwnd > net->flight_size) { 3318163953Srrs /* 3319163953Srrs * for this flight I made an adjustment we 3320163953Srrs * need to decrease the portion by a share 3321163953Srrs * our previous adjustment. 3322163953Srrs */ 3323163953Srrs int diff_adj; 3324163953Srrs 3325163953Srrs diff_adj = net->cwnd - net->flight_size; 3326163953Srrs if (diff_adj > my_portion) 3327163953Srrs my_portion = 0; 3328163953Srrs else 3329163953Srrs my_portion -= diff_adj; 3330163953Srrs } 3331163953Srrs /* 3332163953Srrs * back down to the previous cwnd (assume we have 3333163953Srrs * had a sack before this packet). minus what ever 3334163953Srrs * portion of the overage is my fault. 3335163953Srrs */ 3336163953Srrs net->cwnd -= my_portion; 3337163953Srrs 3338163953Srrs /* we will NOT back down more than 1 MTU */ 3339163953Srrs if (net->cwnd <= net->mtu) { 3340163953Srrs net->cwnd = net->mtu; 3341163953Srrs } 3342163953Srrs /* force into CA */ 3343163953Srrs net->ssthresh = net->cwnd - 1; 3344163953Srrs } else { 3345163953Srrs /* 3346163953Srrs * Take 1/4 of the space left or max burst up .. 3347163953Srrs * whichever is less. 3348163953Srrs */ 3349163953Srrs incr = min((bw_avail - on_queue) >> 2, 3350163953Srrs (int)stcb->asoc.max_burst * (int)net->mtu); 3351163953Srrs net->cwnd += incr; 3352163953Srrs } 3353163953Srrs if (net->cwnd > bw_avail) { 3354163953Srrs /* We can't exceed the pipe size */ 3355163953Srrs net->cwnd = bw_avail; 3356163953Srrs } 3357163953Srrs if (net->cwnd < net->mtu) { 3358163953Srrs /* We always have 1 MTU */ 3359163953Srrs net->cwnd = net->mtu; 3360163953Srrs } 3361163953Srrs#ifdef SCTP_CWND_MONITOR 3362163953Srrs if (net->cwnd - old_cwnd != 0) { 3363163953Srrs /* log only changes */ 3364163953Srrs sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), 3365163953Srrs SCTP_CWND_LOG_FROM_SAT); 3366163953Srrs } 3367163953Srrs#endif 3368163953Srrs } 3369163953Srrs} 3370163953Srrs 3371163953Srrsextern int sctp_strict_init; 3372163953Srrsextern int sctp_abort_if_one_2_one_hits_limit; 3373163953Srrs 3374163953Srrs/* 3375163953Srrs * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to 3376163953Srrs * still contain IP/SCTP header - stcb: is the tcb found for this packet - 3377163953Srrs * offset: offset into the mbuf chain to first chunkhdr - length: is the 3378163953Srrs * length of the complete packet outputs: - length: modified to remaining 3379163953Srrs * length after control processing - netp: modified to new sctp_nets after 3380163953Srrs * cookie-echo processing - return NULL to discard the packet (ie. no asoc, 3381163953Srrs * bad packet,...) otherwise return the tcb for this packet 3382163953Srrs */ 3383163953Srrsstatic struct sctp_tcb * 3384163953Srrssctp_process_control(struct mbuf *m, int iphlen, int *offset, int length, 3385163953Srrs struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp, 3386163953Srrs struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen) 3387163953Srrs{ 3388163953Srrs struct sctp_association *asoc; 3389163953Srrs uint32_t vtag_in; 3390163953Srrs int num_chunks = 0; /* number of control chunks processed */ 3391163953Srrs int chk_length; 3392163953Srrs int ret; 3393163953Srrs 3394163953Srrs /* 3395163953Srrs * How big should this be, and should it be alloc'd? Lets try the 3396163953Srrs * d-mtu-ceiling for now (2k) and that should hopefully work ... 3397163953Srrs * until we get into jumbo grams and such.. 3398163953Srrs */ 3399163953Srrs uint8_t chunk_buf[DEFAULT_CHUNK_BUFFER]; 3400163953Srrs struct sctp_tcb *locked_tcb = stcb; 3401163953Srrs int got_auth = 0; 3402163953Srrs uint32_t auth_offset = 0, auth_len = 0; 3403163953Srrs int auth_skipped = 0; 3404163953Srrs 3405163953Srrs#ifdef SCTP_DEBUG 3406163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 3407163953Srrs printf("sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n", 3408163953Srrs iphlen, *offset, length, stcb); 3409163953Srrs } 3410163953Srrs#endif /* SCTP_DEBUG */ 3411163953Srrs 3412163953Srrs /* validate chunk header length... */ 3413163953Srrs if (ntohs(ch->chunk_length) < sizeof(*ch)) { 3414163953Srrs return (NULL); 3415163953Srrs } 3416163953Srrs /* 3417163953Srrs * validate the verification tag 3418163953Srrs */ 3419163953Srrs vtag_in = ntohl(sh->v_tag); 3420163953Srrs 3421163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 3422163953Srrs if (vtag_in != 0) { 3423163953Srrs /* protocol error- silently discard... */ 3424163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3425163953Srrs if (locked_tcb) 3426163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3427163953Srrs return (NULL); 3428163953Srrs } 3429163953Srrs } else if (ch->chunk_type != SCTP_COOKIE_ECHO) { 3430163953Srrs /* 3431163953Srrs * If there is no stcb, skip the AUTH chunk and process 3432163953Srrs * later after a stcb is found (to validate the lookup was 3433163953Srrs * valid. 3434163953Srrs */ 3435163953Srrs if ((ch->chunk_type == SCTP_AUTHENTICATION) && 3436163953Srrs (stcb == NULL) && !sctp_auth_disable) { 3437163953Srrs /* save this chunk for later processing */ 3438163953Srrs auth_skipped = 1; 3439163953Srrs auth_offset = *offset; 3440163953Srrs auth_len = ntohs(ch->chunk_length); 3441163953Srrs 3442163953Srrs /* (temporarily) move past this chunk */ 3443163953Srrs *offset += SCTP_SIZE32(auth_len); 3444163953Srrs if (*offset >= length) { 3445163953Srrs /* no more data left in the mbuf chain */ 3446163953Srrs *offset = length; 3447163953Srrs return (NULL); 3448163953Srrs } 3449163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3450163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 3451163953Srrs } 3452163953Srrs if (ch->chunk_type == SCTP_COOKIE_ECHO) { 3453163953Srrs goto process_control_chunks; 3454163953Srrs } 3455163953Srrs /* 3456163953Srrs * first check if it's an ASCONF with an unknown src addr we 3457163953Srrs * need to look inside to find the association 3458163953Srrs */ 3459163953Srrs if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) { 3460163953Srrs /* inp's refcount may be reduced */ 3461163953Srrs SCTP_INP_INCR_REF(inp); 3462163953Srrs 3463163953Srrs stcb = sctp_findassociation_ep_asconf(m, iphlen, 3464163953Srrs *offset, sh, &inp, netp); 3465163953Srrs if (stcb == NULL) { 3466163953Srrs /* 3467163953Srrs * reduce inp's refcount if not reduced in 3468163953Srrs * sctp_findassociation_ep_asconf(). 3469163953Srrs */ 3470163953Srrs SCTP_INP_DECR_REF(inp); 3471163953Srrs } 3472163953Srrs /* now go back and verify any auth chunk to be sure */ 3473163953Srrs if (auth_skipped && (stcb != NULL)) { 3474163953Srrs struct sctp_auth_chunk *auth; 3475163953Srrs 3476163953Srrs auth = (struct sctp_auth_chunk *) 3477163953Srrs sctp_m_getptr(m, auth_offset, 3478163953Srrs auth_len, chunk_buf); 3479163953Srrs got_auth = 1; 3480163953Srrs auth_skipped = 0; 3481163953Srrs if (sctp_handle_auth(stcb, auth, m, 3482163953Srrs auth_offset)) { 3483163953Srrs /* auth HMAC failed so dump it */ 3484163953Srrs *offset = length; 3485163953Srrs return (NULL); 3486163953Srrs } else { 3487163953Srrs /* remaining chunks are HMAC checked */ 3488163953Srrs stcb->asoc.authenticated = 1; 3489163953Srrs } 3490163953Srrs } 3491163953Srrs } 3492163953Srrs if (stcb == NULL) { 3493163953Srrs /* no association, so it's out of the blue... */ 3494163953Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, NULL); 3495163953Srrs *offset = length; 3496163953Srrs if (locked_tcb) 3497163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3498163953Srrs return (NULL); 3499163953Srrs } 3500163953Srrs asoc = &stcb->asoc; 3501163953Srrs /* ABORT and SHUTDOWN can use either v_tag... */ 3502163953Srrs if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) || 3503163953Srrs (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) || 3504163953Srrs (ch->chunk_type == SCTP_PACKET_DROPPED)) { 3505163953Srrs if ((vtag_in == asoc->my_vtag) || 3506163953Srrs ((ch->chunk_flags & SCTP_HAD_NO_TCB) && 3507163953Srrs (vtag_in == asoc->peer_vtag))) { 3508163953Srrs /* this is valid */ 3509163953Srrs } else { 3510163953Srrs /* drop this packet... */ 3511163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3512163953Srrs if (locked_tcb) 3513163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3514163953Srrs return (NULL); 3515163953Srrs } 3516163953Srrs } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 3517163953Srrs if (vtag_in != asoc->my_vtag) { 3518163953Srrs /* 3519163953Srrs * this could be a stale SHUTDOWN-ACK or the 3520163953Srrs * peer never got the SHUTDOWN-COMPLETE and 3521163953Srrs * is still hung; we have started a new asoc 3522163953Srrs * but it won't complete until the shutdown 3523163953Srrs * is completed 3524163953Srrs */ 3525163953Srrs if (locked_tcb) 3526163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3527163953Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, 3528163953Srrs NULL); 3529163953Srrs return (NULL); 3530163953Srrs } 3531163953Srrs } else { 3532163953Srrs /* for all other chunks, vtag must match */ 3533163953Srrs if (vtag_in != asoc->my_vtag) { 3534163953Srrs /* invalid vtag... */ 3535163953Srrs#ifdef SCTP_DEBUG 3536163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3537163953Srrs printf("invalid vtag: %xh, expect %xh\n", vtag_in, asoc->my_vtag); 3538163953Srrs } 3539163953Srrs#endif /* SCTP_DEBUG */ 3540163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3541163953Srrs if (locked_tcb) 3542163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3543163953Srrs *offset = length; 3544163953Srrs return (NULL); 3545163953Srrs } 3546163953Srrs } 3547163953Srrs } /* end if !SCTP_COOKIE_ECHO */ 3548163953Srrs /* 3549163953Srrs * process all control chunks... 3550163953Srrs */ 3551163953Srrs if (((ch->chunk_type == SCTP_SELECTIVE_ACK) || 3552163953Srrs (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) && 3553163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 3554163953Srrs /* implied cookie-ack.. we must have lost the ack */ 3555163953Srrs stcb->asoc.overall_error_count = 0; 3556163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, 3557163953Srrs *netp); 3558163953Srrs } 3559163953Srrsprocess_control_chunks: 3560163953Srrs 3561163953Srrs while (IS_SCTP_CONTROL(ch)) { 3562163953Srrs /* validate chunk length */ 3563163953Srrs chk_length = ntohs(ch->chunk_length); 3564163953Srrs#ifdef SCTP_DEBUG 3565163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT2) { 3566163953Srrs printf("sctp_process_control: processing a chunk type=%u, len=%u\n", 3567163953Srrs ch->chunk_type, chk_length); 3568163953Srrs } 3569163953Srrs#endif /* SCTP_DEBUG */ 3570163953Srrs if ((size_t)chk_length < sizeof(*ch) || 3571163953Srrs (*offset + chk_length) > length) { 3572163953Srrs *offset = length; 3573163953Srrs if (locked_tcb) 3574163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3575163953Srrs return (NULL); 3576163953Srrs } 3577163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks); 3578163953Srrs /* 3579163953Srrs * INIT-ACK only gets the init ack "header" portion only 3580163953Srrs * because we don't have to process the peer's COOKIE. All 3581163953Srrs * others get a complete chunk. 3582163953Srrs */ 3583163953Srrs if (ch->chunk_type == SCTP_INITIATION_ACK) { 3584163953Srrs /* get an init-ack chunk */ 3585163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3586163953Srrs sizeof(struct sctp_init_ack_chunk), chunk_buf); 3587163953Srrs if (ch == NULL) { 3588163953Srrs *offset = length; 3589163953Srrs if (locked_tcb) 3590163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3591163953Srrs return (NULL); 3592163953Srrs } 3593163953Srrs } else { 3594163953Srrs /* get a complete chunk... */ 3595163953Srrs if ((size_t)chk_length > sizeof(chunk_buf)) { 3596163953Srrs struct mbuf *oper; 3597163953Srrs struct sctp_paramhdr *phdr; 3598163953Srrs 3599163953Srrs oper = NULL; 3600163953Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3601163953Srrs 1, M_DONTWAIT, 1, MT_DATA); 3602163953Srrs if (oper) { 3603163953Srrs /* pre-reserve some space */ 3604163953Srrs oper->m_data += sizeof(struct sctp_chunkhdr); 3605163953Srrs oper->m_len = sizeof(struct sctp_paramhdr); 3606163953Srrs oper->m_pkthdr.len = oper->m_len; 3607163953Srrs phdr = mtod(oper, struct sctp_paramhdr *); 3608163953Srrs phdr->param_type = htons(SCTP_CAUSE_OUT_OF_RESC); 3609163953Srrs phdr->param_length = htons(sizeof(struct sctp_paramhdr)); 3610163953Srrs sctp_queue_op_err(stcb, oper); 3611163953Srrs } 3612163953Srrs if (locked_tcb) 3613163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3614163953Srrs return (NULL); 3615163953Srrs } 3616163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3617163953Srrs chk_length, chunk_buf); 3618163953Srrs if (ch == NULL) { 3619163953Srrs printf("sctp_process_control: Can't get the all data....\n"); 3620163953Srrs *offset = length; 3621163953Srrs if (locked_tcb) 3622163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3623163953Srrs return (NULL); 3624163953Srrs } 3625163953Srrs } 3626163953Srrs num_chunks++; 3627163953Srrs /* Save off the last place we got a control from */ 3628163953Srrs if (stcb != NULL) { 3629163953Srrs if ((*netp != NULL) || (ch->chunk_type == SCTP_ASCONF)) { 3630163953Srrs /* 3631163953Srrs * allow last_control to be NULL if 3632163953Srrs * ASCONF... ASCONF processing will find the 3633163953Srrs * right net later 3634163953Srrs */ 3635163953Srrs stcb->asoc.last_control_chunk_from = *netp; 3636163953Srrs } 3637163953Srrs } 3638163953Srrs#ifdef SCTP_AUDITING_ENABLED 3639163953Srrs sctp_audit_log(0xB0, ch->chunk_type); 3640163953Srrs#endif 3641163953Srrs 3642163953Srrs /* check to see if this chunk required auth, but isn't */ 3643163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 3644163953Srrs sctp_auth_is_required_chunk(ch->chunk_type, 3645163953Srrs stcb->asoc.local_auth_chunks) && 3646163953Srrs !stcb->asoc.authenticated) { 3647163953Srrs /* "silently" ignore */ 3648163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 3649163953Srrs goto next_chunk; 3650163953Srrs } 3651163953Srrs switch (ch->chunk_type) { 3652163953Srrs case SCTP_INITIATION: 3653163953Srrs /* must be first and only chunk */ 3654163953Srrs#ifdef SCTP_DEBUG 3655163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3656163953Srrs printf("SCTP_INIT\n"); 3657163953Srrs } 3658163953Srrs#endif /* SCTP_DEBUG */ 3659163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3660163953Srrs /* We are not interested anymore? */ 3661163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3662163953Srrs /* 3663163953Srrs * collision case where we are 3664163953Srrs * sending to them too 3665163953Srrs */ 3666163953Srrs ; 3667163953Srrs } else { 3668163953Srrs if (locked_tcb) 3669163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3670163953Srrs *offset = length; 3671163953Srrs return (NULL); 3672163953Srrs } 3673163953Srrs } 3674163953Srrs if ((num_chunks > 1) || 3675163953Srrs (sctp_strict_init && (length - *offset > SCTP_SIZE32(chk_length)))) { 3676163953Srrs *offset = length; 3677163953Srrs if (locked_tcb) 3678163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3679163953Srrs return (NULL); 3680163953Srrs } 3681163953Srrs if ((stcb != NULL) && 3682163953Srrs (SCTP_GET_STATE(&stcb->asoc) == 3683163953Srrs SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3684163953Srrs sctp_send_shutdown_ack(stcb, 3685163953Srrs stcb->asoc.primary_destination); 3686163953Srrs *offset = length; 3687163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3688163953Srrs if (locked_tcb) 3689163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3690163953Srrs return (NULL); 3691163953Srrs } 3692163953Srrs sctp_handle_init(m, iphlen, *offset, sh, 3693163953Srrs (struct sctp_init_chunk *)ch, inp, stcb, *netp); 3694163953Srrs *offset = length; 3695163953Srrs if (locked_tcb) 3696163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3697163953Srrs return (NULL); 3698163953Srrs break; 3699163953Srrs case SCTP_INITIATION_ACK: 3700163953Srrs /* must be first and only chunk */ 3701163953Srrs#ifdef SCTP_DEBUG 3702163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3703163953Srrs printf("SCTP_INIT-ACK\n"); 3704163953Srrs } 3705163953Srrs#endif /* SCTP_DEBUG */ 3706163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3707163953Srrs /* We are not interested anymore */ 3708163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3709163953Srrs ; 3710163953Srrs } else { 3711163953Srrs if (locked_tcb) 3712163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3713163953Srrs *offset = length; 3714163953Srrs if (stcb) { 3715163953Srrs sctp_free_assoc(inp, stcb, 0); 3716163953Srrs } 3717163953Srrs return (NULL); 3718163953Srrs } 3719163953Srrs } 3720163953Srrs if ((num_chunks > 1) || 3721163953Srrs (sctp_strict_init && (length - *offset > SCTP_SIZE32(chk_length)))) { 3722163953Srrs *offset = length; 3723163953Srrs if (locked_tcb) 3724163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3725163953Srrs return (NULL); 3726163953Srrs } 3727163953Srrs ret = sctp_handle_init_ack(m, iphlen, *offset, sh, 3728163953Srrs (struct sctp_init_ack_chunk *)ch, stcb, *netp); 3729163953Srrs /* 3730163953Srrs * Special case, I must call the output routine to 3731163953Srrs * get the cookie echoed 3732163953Srrs */ 3733163953Srrs if ((stcb) && ret == 0) 3734163953Srrs sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3735163953Srrs *offset = length; 3736163953Srrs if (locked_tcb) 3737163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3738163953Srrs return (NULL); 3739163953Srrs break; 3740163953Srrs case SCTP_SELECTIVE_ACK: 3741163953Srrs#ifdef SCTP_DEBUG 3742163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3743163953Srrs printf("SCTP_SACK\n"); 3744163953Srrs } 3745163953Srrs#endif /* SCTP_DEBUG */ 3746163953Srrs SCTP_STAT_INCR(sctps_recvsacks); 3747163953Srrs { 3748163953Srrs struct sctp_sack_chunk *sack; 3749163953Srrs int abort_now = 0; 3750163953Srrs uint32_t a_rwnd, cum_ack; 3751163953Srrs uint16_t num_seg; 3752163953Srrs int nonce_sum_flag; 3753163953Srrs 3754163953Srrs sack = (struct sctp_sack_chunk *)ch; 3755163953Srrs 3756163953Srrs nonce_sum_flag = ch->chunk_flags & SCTP_SACK_NONCE_SUM; 3757163953Srrs cum_ack = ntohl(sack->sack.cum_tsn_ack); 3758163953Srrs num_seg = ntohs(sack->sack.num_gap_ack_blks); 3759163953Srrs a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd); 3760163953Srrs stcb->asoc.seen_a_sack_this_pkt = 1; 3761163953Srrs if ((stcb->asoc.pr_sctp_cnt == 0) && 3762163953Srrs (num_seg == 0) && 3763163953Srrs ((compare_with_wrap(cum_ack, stcb->asoc.last_acked_seq, MAX_TSN)) || 3764163953Srrs (cum_ack == stcb->asoc.last_acked_seq)) && 3765163953Srrs (stcb->asoc.saw_sack_with_frags == 0) && 3766163953Srrs (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) 3767163953Srrs ) { 3768163953Srrs /* 3769163953Srrs * We have a SIMPLE sack having no 3770163953Srrs * prior segments and data on sent 3771163953Srrs * queue to be acked.. Use the 3772163953Srrs * faster path sack processing. We 3773163953Srrs * also allow window update sacks 3774163953Srrs * with no missing segments to go 3775163953Srrs * this way too. 3776163953Srrs */ 3777163953Srrs sctp_express_handle_sack(stcb, cum_ack, a_rwnd, nonce_sum_flag, &abort_now); 3778163953Srrs } else { 3779163953Srrs sctp_handle_sack(sack, stcb, *netp, &abort_now); 3780163953Srrs } 3781163953Srrs if (abort_now) { 3782163953Srrs /* ABORT signal from sack processing */ 3783163953Srrs *offset = length; 3784163953Srrs return (NULL); 3785163953Srrs } 3786163953Srrs } 3787163953Srrs break; 3788163953Srrs case SCTP_HEARTBEAT_REQUEST: 3789163953Srrs#ifdef SCTP_DEBUG 3790163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3791163953Srrs printf("SCTP_HEARTBEAT\n"); 3792163953Srrs } 3793163953Srrs#endif /* SCTP_DEBUG */ 3794163953Srrs SCTP_STAT_INCR(sctps_recvheartbeat); 3795163953Srrs sctp_send_heartbeat_ack(stcb, m, *offset, chk_length, 3796163953Srrs *netp); 3797163953Srrs 3798163953Srrs /* He's alive so give him credit */ 3799163953Srrs stcb->asoc.overall_error_count = 0; 3800163953Srrs break; 3801163953Srrs case SCTP_HEARTBEAT_ACK: 3802163953Srrs#ifdef SCTP_DEBUG 3803163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3804163953Srrs printf("SCTP_HEARTBEAT-ACK\n"); 3805163953Srrs } 3806163953Srrs#endif /* SCTP_DEBUG */ 3807163953Srrs 3808163953Srrs /* He's alive so give him credit */ 3809163953Srrs stcb->asoc.overall_error_count = 0; 3810163953Srrs SCTP_STAT_INCR(sctps_recvheartbeatack); 3811163953Srrs sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch, 3812163953Srrs stcb, *netp); 3813163953Srrs break; 3814163953Srrs case SCTP_ABORT_ASSOCIATION: 3815163953Srrs#ifdef SCTP_DEBUG 3816163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3817163953Srrs printf("SCTP_ABORT\n"); 3818163953Srrs } 3819163953Srrs#endif /* SCTP_DEBUG */ 3820163953Srrs sctp_handle_abort((struct sctp_abort_chunk *)ch, 3821163953Srrs stcb, *netp); 3822163953Srrs *offset = length; 3823163953Srrs return (NULL); 3824163953Srrs break; 3825163953Srrs case SCTP_SHUTDOWN: 3826163953Srrs#ifdef SCTP_DEBUG 3827163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3828163953Srrs printf("SCTP_SHUTDOWN\n"); 3829163953Srrs } 3830163953Srrs#endif /* SCTP_DEBUG */ 3831163953Srrs { 3832163953Srrs int abort_flag = 0; 3833163953Srrs 3834163953Srrs sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch, 3835163953Srrs stcb, *netp, &abort_flag); 3836163953Srrs if (abort_flag) { 3837163953Srrs *offset = length; 3838163953Srrs return (NULL); 3839163953Srrs } 3840163953Srrs } 3841163953Srrs break; 3842163953Srrs case SCTP_SHUTDOWN_ACK: 3843163953Srrs#ifdef SCTP_DEBUG 3844163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3845163953Srrs printf("SCTP_SHUTDOWN-ACK\n"); 3846163953Srrs } 3847163953Srrs#endif /* SCTP_DEBUG */ 3848163953Srrs sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp); 3849163953Srrs *offset = length; 3850163953Srrs return (NULL); 3851163953Srrs break; 3852163953Srrs case SCTP_OPERATION_ERROR: 3853163953Srrs#ifdef SCTP_DEBUG 3854163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3855163953Srrs printf("SCTP_OP-ERR\n"); 3856163953Srrs } 3857163953Srrs#endif /* SCTP_DEBUG */ 3858163953Srrs if (sctp_handle_error(ch, stcb, *netp) < 0) { 3859163953Srrs *offset = length; 3860163953Srrs return (NULL); 3861163953Srrs } 3862163953Srrs break; 3863163953Srrs case SCTP_COOKIE_ECHO: 3864163953Srrs#ifdef SCTP_DEBUG 3865163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3866163953Srrs printf("SCTP_COOKIE-ECHO stcb is %p\n", stcb); 3867163953Srrs } 3868163953Srrs#endif /* SCTP_DEBUG */ 3869163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3870163953Srrs ; 3871163953Srrs } else { 3872163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) && 3873163953Srrs (stcb == NULL)) { 3874163953Srrs /* We are not interested anymore */ 3875163953Srrs *offset = length; 3876163953Srrs return (NULL); 3877163953Srrs } 3878163953Srrs } 3879163953Srrs /* 3880163953Srrs * First are we accepting? We do this again here 3881163953Srrs * since it is possible that a previous endpoint WAS 3882163953Srrs * listening responded to a INIT-ACK and then 3883163953Srrs * closed. We opened and bound.. and are now no 3884163953Srrs * longer listening. 3885163953Srrs */ 3886163953Srrs if (inp->sctp_socket->so_qlimit == 0) { 3887163953Srrs if ((stcb) && (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3888163953Srrs /* 3889163953Srrs * special case, is this a retran'd 3890163953Srrs * COOKIE-ECHO or a restarting assoc 3891163953Srrs * that is a peeled off or 3892163953Srrs * one-to-one style socket. 3893163953Srrs */ 3894163953Srrs goto process_cookie_anyway; 3895163953Srrs } 3896163953Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, 3897163953Srrs NULL); 3898163953Srrs *offset = length; 3899163953Srrs return (NULL); 3900163953Srrs } else if (inp->sctp_socket->so_qlimit) { 3901163953Srrs /* we are accepting so check limits like TCP */ 3902163953Srrs if (inp->sctp_socket->so_qlen > 3903163953Srrs inp->sctp_socket->so_qlimit) { 3904163953Srrs /* no space */ 3905163953Srrs struct mbuf *oper; 3906163953Srrs struct sctp_paramhdr *phdr; 3907163953Srrs 3908163953Srrs if (sctp_abort_if_one_2_one_hits_limit) { 3909163953Srrs oper = NULL; 3910163953Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3911163953Srrs 1, M_DONTWAIT, 1, MT_DATA); 3912163953Srrs if (oper) { 3913163953Srrs oper->m_len = 3914163953Srrs oper->m_pkthdr.len = 3915163953Srrs sizeof(struct sctp_paramhdr); 3916163953Srrs phdr = mtod(oper, 3917163953Srrs struct sctp_paramhdr *); 3918163953Srrs phdr->param_type = 3919163953Srrs htons(SCTP_CAUSE_OUT_OF_RESC); 3920163953Srrs phdr->param_length = 3921163953Srrs htons(sizeof(struct sctp_paramhdr)); 3922163953Srrs } 3923163953Srrs sctp_abort_association(inp, stcb, m, 3924163953Srrs iphlen, sh, oper); 3925163953Srrs } 3926163953Srrs *offset = length; 3927163953Srrs return (NULL); 3928163953Srrs } 3929163953Srrs } 3930163953Srrs process_cookie_anyway: 3931163953Srrs { 3932163953Srrs struct mbuf *ret_buf; 3933163953Srrs 3934163953Srrs ret_buf = 3935163953Srrs sctp_handle_cookie_echo(m, iphlen, 3936163953Srrs *offset, sh, 3937163953Srrs (struct sctp_cookie_echo_chunk *)ch, 3938163953Srrs &inp, &stcb, netp, 3939163953Srrs auth_skipped, 3940163953Srrs auth_offset, 3941163953Srrs auth_len); 3942163953Srrs 3943163953Srrs if (ret_buf == NULL) { 3944163953Srrs if (locked_tcb) { 3945163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3946163953Srrs } 3947163953Srrs#ifdef SCTP_DEBUG 3948163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3949163953Srrs printf("GAK, null buffer\n"); 3950163953Srrs } 3951163953Srrs#endif /* SCTP_DEBUG */ 3952163953Srrs auth_skipped = 0; 3953163953Srrs *offset = length; 3954163953Srrs return (NULL); 3955163953Srrs } 3956163953Srrs /* if AUTH skipped, see if it verified... */ 3957163953Srrs if (auth_skipped) { 3958163953Srrs got_auth = 1; 3959163953Srrs auth_skipped = 0; 3960163953Srrs } 3961163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 3962163953Srrs /* 3963163953Srrs * Restart the timer if we have 3964163953Srrs * pending data 3965163953Srrs */ 3966163953Srrs struct sctp_tmit_chunk *chk; 3967163953Srrs 3968163953Srrs chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 3969163953Srrs if (chk) { 3970163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, 3971163953Srrs stcb->sctp_ep, stcb, 3972163953Srrs chk->whoTo); 3973163953Srrs } 3974163953Srrs } 3975163953Srrs } 3976163953Srrs break; 3977163953Srrs case SCTP_COOKIE_ACK: 3978163953Srrs#ifdef SCTP_DEBUG 3979163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 3980163953Srrs printf("SCTP_COOKIE-ACK\n"); 3981163953Srrs } 3982163953Srrs#endif /* SCTP_DEBUG */ 3983163953Srrs 3984163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3985163953Srrs /* We are not interested anymore */ 3986163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3987163953Srrs ; 3988163953Srrs } else { 3989163953Srrs sctp_free_assoc(inp, stcb, 0); 3990163953Srrs *offset = length; 3991163953Srrs return (NULL); 3992163953Srrs } 3993163953Srrs } 3994163953Srrs /* He's alive so give him credit */ 3995163953Srrs stcb->asoc.overall_error_count = 0; 3996163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp); 3997163953Srrs break; 3998163953Srrs case SCTP_ECN_ECHO: 3999163953Srrs#ifdef SCTP_DEBUG 4000163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4001163953Srrs printf("SCTP_ECN-ECHO\n"); 4002163953Srrs } 4003163953Srrs#endif /* SCTP_DEBUG */ 4004163953Srrs /* He's alive so give him credit */ 4005163953Srrs stcb->asoc.overall_error_count = 0; 4006163953Srrs sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, 4007163953Srrs stcb); 4008163953Srrs break; 4009163953Srrs case SCTP_ECN_CWR: 4010163953Srrs#ifdef SCTP_DEBUG 4011163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4012163953Srrs printf("SCTP_ECN-CWR\n"); 4013163953Srrs } 4014163953Srrs#endif /* SCTP_DEBUG */ 4015163953Srrs /* He's alive so give him credit */ 4016163953Srrs stcb->asoc.overall_error_count = 0; 4017163953Srrs 4018163953Srrs sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb); 4019163953Srrs break; 4020163953Srrs case SCTP_SHUTDOWN_COMPLETE: 4021163953Srrs#ifdef SCTP_DEBUG 4022163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4023163953Srrs printf("SCTP_SHUTDOWN-COMPLETE\n"); 4024163953Srrs } 4025163953Srrs#endif /* SCTP_DEBUG */ 4026163953Srrs /* must be first and only chunk */ 4027163953Srrs if ((num_chunks > 1) || 4028163953Srrs (length - *offset > SCTP_SIZE32(chk_length))) { 4029163953Srrs *offset = length; 4030163953Srrs if (locked_tcb) 4031163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4032163953Srrs 4033163953Srrs return (NULL); 4034163953Srrs } 4035163953Srrs sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch, 4036163953Srrs stcb, *netp); 4037163953Srrs *offset = length; 4038163953Srrs return (NULL); 4039163953Srrs break; 4040163953Srrs case SCTP_ASCONF: 4041163953Srrs#ifdef SCTP_DEBUG 4042163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4043163953Srrs printf("SCTP_ASCONF\n"); 4044163953Srrs } 4045163953Srrs#endif /* SCTP_DEBUG */ 4046163953Srrs /* He's alive so give him credit */ 4047163953Srrs stcb->asoc.overall_error_count = 0; 4048163953Srrs 4049163953Srrs sctp_handle_asconf(m, *offset, 4050163953Srrs (struct sctp_asconf_chunk *)ch, stcb); 4051163953Srrs break; 4052163953Srrs case SCTP_ASCONF_ACK: 4053163953Srrs#ifdef SCTP_DEBUG 4054163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4055163953Srrs printf("SCTP_ASCONF-ACK\n"); 4056163953Srrs } 4057163953Srrs#endif /* SCTP_DEBUG */ 4058163953Srrs /* He's alive so give him credit */ 4059163953Srrs stcb->asoc.overall_error_count = 0; 4060163953Srrs 4061163953Srrs sctp_handle_asconf_ack(m, *offset, 4062163953Srrs (struct sctp_asconf_ack_chunk *)ch, stcb, *netp); 4063163953Srrs break; 4064163953Srrs case SCTP_FORWARD_CUM_TSN: 4065163953Srrs#ifdef SCTP_DEBUG 4066163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4067163953Srrs printf("SCTP_FWD-TSN\n"); 4068163953Srrs } 4069163953Srrs#endif /* SCTP_DEBUG */ 4070163953Srrs /* He's alive so give him credit */ 4071163953Srrs { 4072163953Srrs int abort_flag = 0; 4073163953Srrs 4074163953Srrs stcb->asoc.overall_error_count = 0; 4075163953Srrs *fwd_tsn_seen = 1; 4076163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4077163953Srrs /* We are not interested anymore */ 4078163953Srrs sctp_free_assoc(inp, stcb, 0); 4079163953Srrs *offset = length; 4080163953Srrs return (NULL); 4081163953Srrs } 4082163953Srrs sctp_handle_forward_tsn(stcb, 4083163953Srrs (struct sctp_forward_tsn_chunk *)ch, &abort_flag); 4084163953Srrs if (abort_flag) { 4085163953Srrs *offset = length; 4086163953Srrs return (NULL); 4087163953Srrs } else { 4088163953Srrs stcb->asoc.overall_error_count = 0; 4089163953Srrs } 4090163953Srrs 4091163953Srrs } 4092163953Srrs break; 4093163953Srrs case SCTP_STREAM_RESET: 4094163953Srrs#ifdef SCTP_DEBUG 4095163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4096163953Srrs printf("SCTP_STREAM_RESET\n"); 4097163953Srrs } 4098163953Srrs#endif /* SCTP_DEBUG */ 4099163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4100163953Srrs chk_length, chunk_buf); 4101163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4102163953Srrs /* We are not interested anymore */ 4103163953Srrs sctp_free_assoc(inp, stcb, 0); 4104163953Srrs *offset = length; 4105163953Srrs return (NULL); 4106163953Srrs } 4107163953Srrs if (stcb->asoc.peer_supports_strreset == 0) { 4108163953Srrs /* 4109163953Srrs * hmm, peer should have announced this, but 4110163953Srrs * we will turn it on since he is sending us 4111163953Srrs * a stream reset. 4112163953Srrs */ 4113163953Srrs stcb->asoc.peer_supports_strreset = 1; 4114163953Srrs } 4115163953Srrs if (sctp_handle_stream_reset(stcb, (struct sctp_stream_reset_out_req *)ch)) { 4116163953Srrs /* stop processing */ 4117163953Srrs *offset = length; 4118163953Srrs return (NULL); 4119163953Srrs } 4120163953Srrs break; 4121163953Srrs case SCTP_PACKET_DROPPED: 4122163953Srrs#ifdef SCTP_DEBUG 4123163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4124163953Srrs printf("SCTP_PACKET_DROPPED\n"); 4125163953Srrs } 4126163953Srrs#endif /* SCTP_DEBUG */ 4127163953Srrs /* re-get it all please */ 4128163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4129163953Srrs chk_length, chunk_buf); 4130163953Srrs 4131163953Srrs sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch, 4132163953Srrs stcb, *netp); 4133163953Srrs 4134163953Srrs break; 4135163953Srrs 4136163953Srrs case SCTP_AUTHENTICATION: 4137163953Srrs#ifdef SCTP_DEBUG 4138163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4139163953Srrs printf("SCTP_AUTHENTICATION\n"); 4140163953Srrs } 4141163953Srrs#endif /* SCTP_DEBUG */ 4142163953Srrs if (sctp_auth_disable) 4143163953Srrs goto unknown_chunk; 4144163953Srrs 4145163953Srrs if (stcb == NULL) { 4146163953Srrs /* save the first AUTH for later processing */ 4147163953Srrs if (auth_skipped == 0) { 4148163953Srrs auth_offset = *offset; 4149163953Srrs auth_len = chk_length; 4150163953Srrs auth_skipped = 1; 4151163953Srrs } 4152163953Srrs /* skip this chunk (temporarily) */ 4153163953Srrs goto next_chunk; 4154163953Srrs } 4155163953Srrs if (got_auth == 1) { 4156163953Srrs /* skip this chunk... it's already auth'd */ 4157163953Srrs goto next_chunk; 4158163953Srrs } 4159163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4160163953Srrs chk_length, chunk_buf); 4161163953Srrs got_auth = 1; 4162163953Srrs if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, 4163163953Srrs m, *offset)) { 4164163953Srrs /* auth HMAC failed so dump the packet */ 4165163953Srrs *offset = length; 4166163953Srrs return (stcb); 4167163953Srrs } else { 4168163953Srrs /* remaining chunks are HMAC checked */ 4169163953Srrs stcb->asoc.authenticated = 1; 4170163953Srrs } 4171163953Srrs break; 4172163953Srrs 4173163953Srrs default: 4174163953Srrs unknown_chunk: 4175163953Srrs /* it's an unknown chunk! */ 4176163953Srrs if ((ch->chunk_type & 0x40) && (stcb != NULL)) { 4177163953Srrs struct mbuf *mm; 4178163953Srrs struct sctp_paramhdr *phd; 4179163953Srrs 4180163953Srrs mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 4181163953Srrs 1, M_DONTWAIT, 1, MT_DATA); 4182163953Srrs if (mm) { 4183163953Srrs phd = mtod(mm, struct sctp_paramhdr *); 4184163953Srrs /* 4185163953Srrs * We cheat and use param type since 4186163953Srrs * we did not bother to define a 4187163953Srrs * error cause struct. They are the 4188163953Srrs * same basic format with different 4189163953Srrs * names. 4190163953Srrs */ 4191163953Srrs phd->param_type = htons(SCTP_CAUSE_UNRECOG_CHUNK); 4192163953Srrs phd->param_length = htons(chk_length + sizeof(*phd)); 4193163953Srrs mm->m_len = sizeof(*phd); 4194163953Srrs mm->m_next = sctp_m_copym(m, *offset, SCTP_SIZE32(chk_length), 4195163953Srrs M_DONTWAIT); 4196163953Srrs if (mm->m_next) { 4197163953Srrs mm->m_pkthdr.len = SCTP_SIZE32(chk_length) + sizeof(*phd); 4198163953Srrs sctp_queue_op_err(stcb, mm); 4199163953Srrs } else { 4200163953Srrs sctp_m_freem(mm); 4201163953Srrs } 4202163953Srrs } 4203163953Srrs } 4204163953Srrs if ((ch->chunk_type & 0x80) == 0) { 4205163953Srrs /* discard this packet */ 4206163953Srrs *offset = length; 4207163953Srrs return (stcb); 4208163953Srrs } /* else skip this bad chunk and continue... */ 4209163953Srrs break; 4210163953Srrs } /* switch (ch->chunk_type) */ 4211163953Srrs 4212163953Srrs 4213163953Srrsnext_chunk: 4214163953Srrs /* get the next chunk */ 4215163953Srrs *offset += SCTP_SIZE32(chk_length); 4216163953Srrs if (*offset >= length) { 4217163953Srrs /* no more data left in the mbuf chain */ 4218163953Srrs break; 4219163953Srrs } 4220163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4221163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 4222163953Srrs if (ch == NULL) { 4223163953Srrs if (locked_tcb) 4224163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4225163953Srrs *offset = length; 4226163953Srrs return (NULL); 4227163953Srrs } 4228163953Srrs } /* while */ 4229163953Srrs return (stcb); 4230163953Srrs} 4231163953Srrs 4232163953Srrs 4233163953Srrs/* 4234163953Srrs * Process the ECN bits we have something set so we must look to see if it is 4235163953Srrs * ECN(0) or ECN(1) or CE 4236163953Srrs */ 4237163953Srrsstatic __inline void 4238163953Srrssctp_process_ecn_marked_a(struct sctp_tcb *stcb, struct sctp_nets *net, 4239163953Srrs uint8_t ecn_bits) 4240163953Srrs{ 4241163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4242163953Srrs ; 4243163953Srrs } else if ((ecn_bits & SCTP_ECT1_BIT) == SCTP_ECT1_BIT) { 4244163953Srrs /* 4245163953Srrs * we only add to the nonce sum for ECT1, ECT0 does not 4246163953Srrs * change the NS bit (that we have yet to find a way to send 4247163953Srrs * it yet). 4248163953Srrs */ 4249163953Srrs 4250163953Srrs /* ECN Nonce stuff */ 4251163953Srrs stcb->asoc.receiver_nonce_sum++; 4252163953Srrs stcb->asoc.receiver_nonce_sum &= SCTP_SACK_NONCE_SUM; 4253163953Srrs 4254163953Srrs /* 4255163953Srrs * Drag up the last_echo point if cumack is larger since we 4256163953Srrs * don't want the point falling way behind by more than 4257163953Srrs * 2^^31 and then having it be incorrect. 4258163953Srrs */ 4259163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4260163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4261163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4262163953Srrs } 4263163953Srrs } else if ((ecn_bits & SCTP_ECT0_BIT) == SCTP_ECT0_BIT) { 4264163953Srrs /* 4265163953Srrs * Drag up the last_echo point if cumack is larger since we 4266163953Srrs * don't want the point falling way behind by more than 4267163953Srrs * 2^^31 and then having it be incorrect. 4268163953Srrs */ 4269163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4270163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4271163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4272163953Srrs } 4273163953Srrs } 4274163953Srrs} 4275163953Srrs 4276163953Srrsstatic __inline void 4277163953Srrssctp_process_ecn_marked_b(struct sctp_tcb *stcb, struct sctp_nets *net, 4278163953Srrs uint32_t high_tsn, uint8_t ecn_bits) 4279163953Srrs{ 4280163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4281163953Srrs /* 4282163953Srrs * we possibly must notify the sender that a congestion 4283163953Srrs * window reduction is in order. We do this by adding a ECNE 4284163953Srrs * chunk to the output chunk queue. The incoming CWR will 4285163953Srrs * remove this chunk. 4286163953Srrs */ 4287163953Srrs if (compare_with_wrap(high_tsn, stcb->asoc.last_echo_tsn, 4288163953Srrs MAX_TSN)) { 4289163953Srrs /* Yep, we need to add a ECNE */ 4290163953Srrs sctp_send_ecn_echo(stcb, net, high_tsn); 4291163953Srrs stcb->asoc.last_echo_tsn = high_tsn; 4292163953Srrs } 4293163953Srrs } 4294163953Srrs} 4295163953Srrs 4296163953Srrs/* 4297163953Srrs * common input chunk processing (v4 and v6) 4298163953Srrs */ 4299163953Srrsint 4300163953Srrssctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, 4301163953Srrs int length, struct sctphdr *sh, struct sctp_chunkhdr *ch, 4302163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 4303163953Srrs uint8_t ecn_bits) 4304163953Srrs{ 4305163953Srrs /* 4306163953Srrs * Control chunk processing 4307163953Srrs */ 4308163953Srrs uint32_t high_tsn; 4309163953Srrs int fwd_tsn_seen = 0, data_processed = 0; 4310163953Srrs struct mbuf *m = *mm; 4311163953Srrs int abort_flag = 0; 4312163953Srrs int un_sent; 4313163953Srrs 4314163953Srrs SCTP_STAT_INCR(sctps_recvdatagrams); 4315163953Srrs#ifdef SCTP_AUDITING_ENABLED 4316163953Srrs sctp_audit_log(0xE0, 1); 4317163953Srrs sctp_auditing(0, inp, stcb, net); 4318163953Srrs#endif 4319163953Srrs 4320163953Srrs#ifdef SCTP_DEBUG 4321163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4322163996Srrs printf("Ok, Common input processing called, m:%p iphlen:%d offset:%d\n", 4323163996Srrs m, iphlen, offset); 4324163953Srrs } 4325163953Srrs#endif /* SCTP_DEBUG */ 4326163953Srrs 4327163953Srrs if (stcb) { 4328163953Srrs /* always clear this before beginning a packet */ 4329163953Srrs stcb->asoc.authenticated = 0; 4330163953Srrs stcb->asoc.seen_a_sack_this_pkt = 0; 4331163953Srrs } 4332163953Srrs if (IS_SCTP_CONTROL(ch)) { 4333163953Srrs /* process the control portion of the SCTP packet */ 4334163953Srrs stcb = sctp_process_control(m, iphlen, &offset, length, sh, ch, 4335163953Srrs inp, stcb, &net, &fwd_tsn_seen); 4336163953Srrs if (stcb) { 4337163953Srrs /* 4338163953Srrs * This covers us if the cookie-echo was there and 4339163953Srrs * it changes our INP. 4340163953Srrs */ 4341163953Srrs inp = stcb->sctp_ep; 4342163953Srrs } 4343163953Srrs } else { 4344163953Srrs /* 4345163953Srrs * no control chunks, so pre-process DATA chunks (these 4346163953Srrs * checks are taken care of by control processing) 4347163953Srrs */ 4348163953Srrs 4349163953Srrs /* 4350163953Srrs * if DATA only packet, and auth is required, then punt... 4351163953Srrs * can't have authenticated without any AUTH (control) 4352163953Srrs * chunks 4353163953Srrs */ 4354163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 4355163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4356163953Srrs stcb->asoc.local_auth_chunks)) { 4357163953Srrs /* "silently" ignore */ 4358163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4359163953Srrs SCTP_TCB_UNLOCK(stcb); 4360163953Srrs return (1); 4361163953Srrs } 4362163953Srrs if (stcb == NULL) { 4363163953Srrs /* out of the blue DATA chunk */ 4364163953Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL); 4365163953Srrs return (1); 4366163953Srrs } 4367163953Srrs if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) { 4368163953Srrs /* v_tag mismatch! */ 4369163953Srrs SCTP_STAT_INCR(sctps_badvtag); 4370163953Srrs SCTP_TCB_UNLOCK(stcb); 4371163953Srrs return (1); 4372163953Srrs } 4373163953Srrs } 4374163953Srrs 4375163953Srrs if (stcb == NULL) { 4376163953Srrs /* 4377163953Srrs * no valid TCB for this packet, or we found it's a bad 4378163953Srrs * packet while processing control, or we're done with this 4379163953Srrs * packet (done or skip rest of data), so we drop it... 4380163953Srrs */ 4381163953Srrs return (1); 4382163953Srrs } 4383163953Srrs /* 4384163953Srrs * DATA chunk processing 4385163953Srrs */ 4386163953Srrs /* plow through the data chunks while length > offset */ 4387163953Srrs 4388163953Srrs /* 4389163953Srrs * Rest should be DATA only. Check authentication state if AUTH for 4390163953Srrs * DATA is required. 4391163953Srrs */ 4392163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 4393163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4394163953Srrs stcb->asoc.local_auth_chunks) && 4395163953Srrs !stcb->asoc.authenticated) { 4396163953Srrs /* "silently" ignore */ 4397163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4398163953Srrs#ifdef SCTP_DEBUG 4399163953Srrs if (sctp_debug_on & SCTP_DEBUG_AUTH1) 4400163953Srrs printf("Data chunk requires AUTH, skipped\n"); 4401163953Srrs#endif 4402163953Srrs SCTP_TCB_UNLOCK(stcb); 4403163953Srrs return (1); 4404163953Srrs } 4405163953Srrs if (length > offset) { 4406163953Srrs int retval; 4407163953Srrs 4408163953Srrs /* 4409163953Srrs * First check to make sure our state is correct. We would 4410163953Srrs * not get here unless we really did have a tag, so we don't 4411163953Srrs * abort if this happens, just dump the chunk silently. 4412163953Srrs */ 4413163953Srrs switch (SCTP_GET_STATE(&stcb->asoc)) { 4414163953Srrs case SCTP_STATE_COOKIE_ECHOED: 4415163953Srrs /* 4416163953Srrs * we consider data with valid tags in this state 4417163953Srrs * shows us the cookie-ack was lost. Imply it was 4418163953Srrs * there. 4419163953Srrs */ 4420163953Srrs stcb->asoc.overall_error_count = 0; 4421163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net); 4422163953Srrs break; 4423163953Srrs case SCTP_STATE_COOKIE_WAIT: 4424163953Srrs /* 4425163953Srrs * We consider OOTB any data sent during asoc setup. 4426163953Srrs */ 4427163953Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL); 4428163953Srrs SCTP_TCB_UNLOCK(stcb); 4429163953Srrs return (1); 4430163953Srrs break; 4431163953Srrs case SCTP_STATE_EMPTY: /* should not happen */ 4432163953Srrs case SCTP_STATE_INUSE: /* should not happen */ 4433163953Srrs case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */ 4434163953Srrs case SCTP_STATE_SHUTDOWN_ACK_SENT: 4435163953Srrs default: 4436163953Srrs SCTP_TCB_UNLOCK(stcb); 4437163953Srrs return (1); 4438163953Srrs break; 4439163953Srrs case SCTP_STATE_OPEN: 4440163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 4441163953Srrs break; 4442163953Srrs } 4443163953Srrs /* take care of ECN, part 1. */ 4444163953Srrs if (stcb->asoc.ecn_allowed && 4445163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4446163953Srrs sctp_process_ecn_marked_a(stcb, net, ecn_bits); 4447163953Srrs } 4448163953Srrs /* plow through the data chunks while length > offset */ 4449163953Srrs retval = sctp_process_data(mm, iphlen, &offset, length, sh, 4450163953Srrs inp, stcb, net, &high_tsn); 4451163953Srrs if (retval == 2) { 4452163953Srrs /* 4453163953Srrs * The association aborted, NO UNLOCK needed since 4454163953Srrs * the association is destroyed. 4455163953Srrs */ 4456163953Srrs return (0); 4457163953Srrs } 4458163953Srrs data_processed = 1; 4459163953Srrs if (retval == 0) { 4460163953Srrs /* take care of ecn part 2. */ 4461163953Srrs if (stcb->asoc.ecn_allowed && 4462163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4463163953Srrs sctp_process_ecn_marked_b(stcb, net, high_tsn, 4464163953Srrs ecn_bits); 4465163953Srrs } 4466163953Srrs } 4467163953Srrs /* 4468163953Srrs * Anything important needs to have been m_copy'ed in 4469163953Srrs * process_data 4470163953Srrs */ 4471163953Srrs } 4472163953Srrs if ((data_processed == 0) && (fwd_tsn_seen)) { 4473163953Srrs int was_a_gap = 0; 4474163953Srrs 4475163953Srrs if (compare_with_wrap(stcb->asoc.highest_tsn_inside_map, 4476163953Srrs stcb->asoc.cumulative_tsn, MAX_TSN)) { 4477163953Srrs /* there was a gap before this data was processed */ 4478163953Srrs was_a_gap = 1; 4479163953Srrs } 4480163953Srrs sctp_sack_check(stcb, 1, was_a_gap, &abort_flag); 4481163953Srrs if (abort_flag) { 4482163953Srrs /* Again, we aborted so NO UNLOCK needed */ 4483163953Srrs return (0); 4484163953Srrs } 4485163953Srrs } 4486163953Srrs /* trigger send of any chunks in queue... */ 4487163953Srrs#ifdef SCTP_AUDITING_ENABLED 4488163953Srrs sctp_audit_log(0xE0, 2); 4489163953Srrs sctp_auditing(1, inp, stcb, net); 4490163953Srrs#endif 4491163953Srrs#ifdef SCTP_DEBUG 4492163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4493163953Srrs printf("Check for chunk output prw:%d tqe:%d tf=%d\n", 4494163953Srrs stcb->asoc.peers_rwnd, 4495163953Srrs TAILQ_EMPTY(&stcb->asoc.control_send_queue), 4496163953Srrs stcb->asoc.total_flight); 4497163953Srrs } 4498163953Srrs#endif 4499163953Srrs un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 4500163953Srrs 4501163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue) || 4502163953Srrs ((un_sent) && 4503163953Srrs (stcb->asoc.peers_rwnd > 0 || 4504163953Srrs (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) { 4505163953Srrs#ifdef SCTP_DEBUG 4506163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4507163953Srrs printf("Calling chunk OUTPUT\n"); 4508163953Srrs } 4509163953Srrs#endif 4510163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 4511163953Srrs#ifdef SCTP_DEBUG 4512163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT3) { 4513163953Srrs printf("chunk OUTPUT returns\n"); 4514163953Srrs } 4515163953Srrs#endif 4516163953Srrs } 4517163953Srrs#ifdef SCTP_AUDITING_ENABLED 4518163953Srrs sctp_audit_log(0xE0, 3); 4519163953Srrs sctp_auditing(2, inp, stcb, net); 4520163953Srrs#endif 4521163953Srrs SCTP_TCB_UNLOCK(stcb); 4522163953Srrs return (0); 4523163953Srrs} 4524163953Srrs 4525163953Srrsextern int sctp_no_csum_on_loopback; 4526163953Srrs 4527163953Srrs 4528163953Srrsvoid 4529163953Srrssctp_input(m, off) 4530163953Srrs struct mbuf *m; 4531163953Srrs int off; 4532163953Srrs 4533163953Srrs{ 4534163953Srrs#ifdef SCTP_MBUF_LOGGING 4535163953Srrs struct mbuf *mat; 4536163953Srrs 4537163953Srrs#endif 4538163953Srrs int iphlen; 4539163953Srrs int s; 4540163953Srrs uint8_t ecn_bits; 4541163953Srrs struct ip *ip; 4542163953Srrs struct sctphdr *sh; 4543163953Srrs struct sctp_inpcb *inp = NULL; 4544163953Srrs 4545163953Srrs uint32_t check, calc_check; 4546163953Srrs struct sctp_nets *net; 4547163953Srrs struct sctp_tcb *stcb = NULL; 4548163953Srrs struct sctp_chunkhdr *ch; 4549163953Srrs int refcount_up = 0; 4550163953Srrs int length, mlen, offset; 4551163953Srrs 4552163953Srrs 4553163953Srrs iphlen = off; 4554163953Srrs net = NULL; 4555163953Srrs SCTP_STAT_INCR(sctps_recvpackets); 4556163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 4557163953Srrs 4558163953Srrs /* 4559163953Srrs * Strip IP options, we don't allow any in or out. 4560163953Srrs */ 4561163953Srrs#ifdef SCTP_MBUF_LOGGING 4562163953Srrs /* Log in any input mbufs */ 4563163953Srrs mat = m; 4564163953Srrs while (mat) { 4565163953Srrs if (mat->m_flags & M_EXT) { 4566163953Srrs sctp_log_mb(mat, SCTP_MBUF_INPUT); 4567163953Srrs } 4568163953Srrs mat = mat->m_next; 4569163953Srrs } 4570163953Srrs#endif 4571163953Srrs if ((size_t)iphlen > sizeof(struct ip)) { 4572163953Srrs ip_stripoptions(m, (struct mbuf *)0); 4573163953Srrs iphlen = sizeof(struct ip); 4574163953Srrs } 4575163953Srrs /* 4576163953Srrs * Get IP, SCTP, and first chunk header together in first mbuf. 4577163953Srrs */ 4578163953Srrs ip = mtod(m, struct ip *); 4579163953Srrs offset = iphlen + sizeof(*sh) + sizeof(*ch); 4580163953Srrs if (m->m_len < offset) { 4581163953Srrs if ((m = m_pullup(m, offset)) == 0) { 4582163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4583163953Srrs return; 4584163953Srrs } 4585163953Srrs ip = mtod(m, struct ip *); 4586163953Srrs } 4587163953Srrs sh = (struct sctphdr *)((caddr_t)ip + iphlen); 4588163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(*sh)); 4589163953Srrs 4590163953Srrs /* SCTP does not allow broadcasts or multicasts */ 4591163953Srrs if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { 4592163953Srrs goto bad; 4593163953Srrs } 4594163953Srrs if (((ch->chunk_type == SCTP_INITIATION) || 4595163953Srrs (ch->chunk_type == SCTP_INITIATION_ACK) || 4596163953Srrs (ch->chunk_type == SCTP_COOKIE_ECHO)) && 4597163953Srrs (in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif))) { 4598163953Srrs /* 4599163953Srrs * We only look at broadcast if its a front state, All 4600163953Srrs * others we will not have a tcb for anyway. 4601163953Srrs */ 4602163953Srrs goto bad; 4603163953Srrs } 4604163953Srrs /* destination port of 0 is illegal, based on RFC2960. */ 4605163953Srrs if (sh->dest_port == 0) { 4606163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4607163953Srrs goto bad; 4608163953Srrs } 4609163953Srrs /* validate SCTP checksum */ 4610163953Srrs if ((sctp_no_csum_on_loopback == 0) || 4611163953Srrs (m->m_pkthdr.rcvif == NULL) || 4612163953Srrs (m->m_pkthdr.rcvif->if_type != IFT_LOOP)) { 4613163953Srrs /* 4614163953Srrs * we do NOT validate things from the loopback if the sysctl 4615163953Srrs * is set to 1. 4616163953Srrs */ 4617163953Srrs check = sh->checksum; /* save incoming checksum */ 4618163953Srrs if ((check == 0) && (sctp_no_csum_on_loopback)) { 4619163953Srrs /* 4620163953Srrs * special hook for where we got a local address 4621163953Srrs * somehow routed across a non IFT_LOOP type 4622163953Srrs * interface 4623163953Srrs */ 4624163953Srrs if (ip->ip_src.s_addr == ip->ip_dst.s_addr) 4625163953Srrs goto sctp_skip_csum_4; 4626163953Srrs } 4627163953Srrs sh->checksum = 0; /* prepare for calc */ 4628163953Srrs calc_check = sctp_calculate_sum(m, &mlen, iphlen); 4629163953Srrs if (calc_check != check) { 4630163953Srrs#ifdef SCTP_DEBUG 4631163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4632163996Srrs printf("Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 4633163996Srrs calc_check, check, m, mlen, iphlen); 4634163953Srrs } 4635163953Srrs#endif 4636163953Srrs 4637163953Srrs stcb = sctp_findassociation_addr(m, iphlen, 4638163953Srrs offset - sizeof(*ch), 4639163953Srrs sh, ch, &inp, &net); 4640163953Srrs if ((inp) && (stcb)) { 4641163953Srrs sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 4642163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR); 4643163953Srrs } else if ((inp != NULL) && (stcb == NULL)) { 4644163953Srrs refcount_up = 1; 4645163953Srrs } 4646163953Srrs SCTP_STAT_INCR(sctps_badsum); 4647163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 4648163953Srrs goto bad; 4649163953Srrs } 4650163953Srrs sh->checksum = calc_check; 4651163953Srrs } else { 4652163953Srrssctp_skip_csum_4: 4653163953Srrs mlen = m->m_pkthdr.len; 4654163953Srrs } 4655163953Srrs /* validate mbuf chain length with IP payload length */ 4656163953Srrs if (mlen < (ip->ip_len - iphlen)) { 4657163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4658163953Srrs goto bad; 4659163953Srrs } 4660163953Srrs /* 4661163953Srrs * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 4662163953Srrs * IP/SCTP/first chunk header... 4663163953Srrs */ 4664163953Srrs stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 4665163953Srrs sh, ch, &inp, &net); 4666163953Srrs /* inp's ref-count increased && stcb locked */ 4667163953Srrs if (inp == NULL) { 4668163953Srrs struct sctp_init_chunk *init_chk, chunk_buf; 4669163953Srrs 4670163953Srrs SCTP_STAT_INCR(sctps_noport); 4671163953Srrs#ifdef ICMP_BANDLIM 4672163953Srrs /* 4673163953Srrs * we use the bandwidth limiting to protect against sending 4674163953Srrs * too many ABORTS all at once. In this case these count the 4675163953Srrs * same as an ICMP message. 4676163953Srrs */ 4677163953Srrs if (badport_bandlim(0) < 0) 4678163953Srrs goto bad; 4679163953Srrs#endif /* ICMP_BANDLIM */ 4680163953Srrs#ifdef SCTP_DEBUG 4681163953Srrs if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 4682163953Srrs printf("Sending a ABORT from packet entry!\n"); 4683163953Srrs } 4684163953Srrs#endif 4685163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 4686163953Srrs /* 4687163953Srrs * we do a trick here to get the INIT tag, dig in 4688163953Srrs * and get the tag from the INIT and put it in the 4689163953Srrs * common header. 4690163953Srrs */ 4691163953Srrs init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 4692163953Srrs iphlen + sizeof(*sh), sizeof(*init_chk), 4693163953Srrs (uint8_t *) & chunk_buf); 4694163953Srrs if (init_chk != NULL) 4695163953Srrs sh->v_tag = init_chk->init.initiate_tag; 4696163953Srrs } 4697163953Srrs sctp_send_abort(m, iphlen, sh, 0, NULL); 4698163953Srrs goto bad; 4699163953Srrs } else if (stcb == NULL) { 4700163953Srrs refcount_up = 1; 4701163953Srrs } 4702163953Srrs#ifdef IPSEC 4703163953Srrs /* 4704163953Srrs * I very much doubt any of the IPSEC stuff will work but I have no 4705163953Srrs * idea, so I will leave it in place. 4706163953Srrs */ 4707163953Srrs 4708163996Srrs if (inp && ipsec4_in_reject(m, &inp->ip_inp.inp)) { 4709163953Srrs ipsecstat.in_polvio++; 4710163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4711163953Srrs goto bad; 4712163953Srrs } 4713163953Srrs#endif /* IPSEC */ 4714163953Srrs 4715163953Srrs 4716163953Srrs 4717163953Srrs /* 4718163953Srrs * common chunk processing 4719163953Srrs */ 4720163953Srrs length = ip->ip_len + iphlen; 4721163953Srrs offset -= sizeof(struct sctp_chunkhdr); 4722163953Srrs 4723163953Srrs ecn_bits = ip->ip_tos; 4724163953Srrs s = splnet(); 4725163953Srrs 4726163953Srrs sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 4727163953Srrs inp, stcb, net, ecn_bits); 4728163953Srrs /* inp's ref-count reduced && stcb unlocked */ 4729163953Srrs splx(s); 4730163953Srrs if (m) { 4731163953Srrs sctp_m_freem(m); 4732163953Srrs } 4733163953Srrs if ((inp) && (refcount_up)) { 4734163953Srrs /* reduce ref-count */ 4735163953Srrs SCTP_INP_WLOCK(inp); 4736163953Srrs SCTP_INP_DECR_REF(inp); 4737163953Srrs SCTP_INP_WUNLOCK(inp); 4738163953Srrs } 4739163953Srrs return; 4740163953Srrsbad: 4741163953Srrs if (stcb) 4742163953Srrs SCTP_TCB_UNLOCK(stcb); 4743163953Srrs 4744163953Srrs if ((inp) && (refcount_up)) { 4745163953Srrs /* reduce ref-count */ 4746163953Srrs SCTP_INP_WLOCK(inp); 4747163953Srrs SCTP_INP_DECR_REF(inp); 4748163953Srrs SCTP_INP_WUNLOCK(inp); 4749163953Srrs } 4750163953Srrs if (m) { 4751163953Srrs sctp_m_freem(m); 4752163953Srrs } 4753163953Srrs return; 4754163953Srrs} 4755