sctp_input.c revision 170138
1163953Srrs/*- 2169382Srrs * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3163953Srrs * 4163953Srrs * Redistribution and use in source and binary forms, with or without 5163953Srrs * modification, are permitted provided that the following conditions are met: 6163953Srrs * 7163953Srrs * a) Redistributions of source code must retain the above copyright notice, 8163953Srrs * this list of conditions and the following disclaimer. 9163953Srrs * 10163953Srrs * b) Redistributions in binary form must reproduce the above copyright 11163953Srrs * notice, this list of conditions and the following disclaimer in 12163953Srrs * the documentation and/or other materials provided with the distribution. 13163953Srrs * 14163953Srrs * c) Neither the name of Cisco Systems, Inc. nor the names of its 15163953Srrs * contributors may be used to endorse or promote products derived 16163953Srrs * from this software without specific prior written permission. 17163953Srrs * 18163953Srrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19163953Srrs * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20163953Srrs * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21163953Srrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22163953Srrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23163953Srrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24163953Srrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25163953Srrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26163953Srrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27163953Srrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28163953Srrs * THE POSSIBILITY OF SUCH DAMAGE. 29163953Srrs */ 30163953Srrs 31163953Srrs/* $KAME: sctp_input.c,v 1.27 2005/03/06 16:04:17 itojun Exp $ */ 32163953Srrs 33163953Srrs#include <sys/cdefs.h> 34163953Srrs__FBSDID("$FreeBSD: head/sys/netinet/sctp_input.c 170138 2007-05-30 17:39:45Z rrs $"); 35163953Srrs 36163953Srrs#include <netinet/sctp_os.h> 37163953Srrs#include <netinet/sctp_var.h> 38167598Srrs#include <netinet/sctp_sysctl.h> 39163953Srrs#include <netinet/sctp_pcb.h> 40163953Srrs#include <netinet/sctp_header.h> 41163953Srrs#include <netinet/sctputil.h> 42163953Srrs#include <netinet/sctp_output.h> 43163953Srrs#include <netinet/sctp_input.h> 44163953Srrs#include <netinet/sctp_auth.h> 45163953Srrs#include <netinet/sctp_indata.h> 46163953Srrs#include <netinet/sctp_asconf.h> 47170091Srrs#include <netinet/sctp_bsd_addr.h> 48163953Srrs 49163953Srrs 50163953Srrs 51163953Srrsstatic void 52163953Srrssctp_stop_all_cookie_timers(struct sctp_tcb *stcb) 53163953Srrs{ 54163953Srrs struct sctp_nets *net; 55163953Srrs 56165220Srrs /* 57165220Srrs * This now not only stops all cookie timers it also stops any INIT 58165220Srrs * timers as well. This will make sure that the timers are stopped 59165220Srrs * in all collision cases. 60165220Srrs */ 61163953Srrs SCTP_TCB_LOCK_ASSERT(stcb); 62163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 63165220Srrs if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) { 64163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE, 65163953Srrs stcb->sctp_ep, 66163953Srrs stcb, 67165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1); 68165220Srrs } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) { 69165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, 70165220Srrs stcb->sctp_ep, 71165220Srrs stcb, 72165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2); 73163953Srrs } 74163953Srrs } 75163953Srrs} 76163953Srrs 77163953Srrs/* INIT handler */ 78163953Srrsstatic void 79163953Srrssctp_handle_init(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, 80163953Srrs struct sctp_init_chunk *cp, struct sctp_inpcb *inp, struct sctp_tcb *stcb, 81169352Srrs struct sctp_nets *net, int *abort_no_unlock, uint32_t vrf_id, 82169352Srrs uint32_t table_id) 83163953Srrs{ 84163953Srrs struct sctp_init *init; 85163953Srrs struct mbuf *op_err; 86163953Srrs uint32_t init_limit; 87163953Srrs 88169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n", 89169420Srrs stcb); 90163953Srrs op_err = NULL; 91163953Srrs init = &cp->init; 92163953Srrs /* First are we accepting? */ 93163953Srrs if ((inp->sctp_socket->so_qlimit == 0) && (stcb == NULL)) { 94169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 95169420Srrs "sctp_handle_init: Abort, so_qlimit:%d\n", 96169420Srrs inp->sctp_socket->so_qlimit); 97163953Srrs /* 98163953Srrs * FIX ME ?? What about TCP model and we have a 99163953Srrs * match/restart case? 100163953Srrs */ 101169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 102169352Srrs vrf_id, table_id); 103168299Srrs if (stcb) 104168299Srrs *abort_no_unlock = 1; 105163953Srrs return; 106163953Srrs } 107163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) { 108163953Srrs /* Invalid length */ 109163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 110169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 111169352Srrs vrf_id, table_id); 112168299Srrs if (stcb) 113168299Srrs *abort_no_unlock = 1; 114163953Srrs return; 115163953Srrs } 116163953Srrs /* validate parameters */ 117163953Srrs if (init->initiate_tag == 0) { 118163953Srrs /* protocol error... send abort */ 119163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 120169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 121169352Srrs vrf_id, table_id); 122168299Srrs if (stcb) 123168299Srrs *abort_no_unlock = 1; 124163953Srrs return; 125163953Srrs } 126163953Srrs if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) { 127163953Srrs /* invalid parameter... send abort */ 128163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 129169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 130169352Srrs vrf_id, table_id); 131163953Srrs return; 132163953Srrs } 133163953Srrs if (init->num_inbound_streams == 0) { 134163953Srrs /* protocol error... send abort */ 135163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 136169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 137169352Srrs vrf_id, table_id); 138168299Srrs if (stcb) 139168299Srrs *abort_no_unlock = 1; 140163953Srrs return; 141163953Srrs } 142163953Srrs if (init->num_outbound_streams == 0) { 143163953Srrs /* protocol error... send abort */ 144163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 145169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, op_err, 146169352Srrs vrf_id, table_id); 147168299Srrs if (stcb) 148168299Srrs *abort_no_unlock = 1; 149163953Srrs return; 150163953Srrs } 151163953Srrs init_limit = offset + ntohs(cp->ch.chunk_length); 152163953Srrs if (sctp_validate_init_auth_params(m, offset + sizeof(*cp), 153163953Srrs init_limit)) { 154163953Srrs /* auth parameter(s) error... send abort */ 155169352Srrs sctp_abort_association(inp, stcb, m, iphlen, sh, NULL, vrf_id, 156169352Srrs table_id); 157168299Srrs if (stcb) 158168299Srrs *abort_no_unlock = 1; 159163953Srrs return; 160163953Srrs } 161163953Srrs /* send an INIT-ACK w/cookie */ 162169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n"); 163169352Srrs sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, sh, cp, vrf_id, 164169352Srrs table_id); 165163953Srrs} 166163953Srrs 167163953Srrs/* 168163953Srrs * process peer "INIT/INIT-ACK" chunk returns value < 0 on error 169163953Srrs */ 170163953Srrsstatic int 171163953Srrssctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb, 172163953Srrs struct sctp_nets *net) 173163953Srrs{ 174163953Srrs struct sctp_init *init; 175163953Srrs struct sctp_association *asoc; 176163953Srrs struct sctp_nets *lnet; 177163953Srrs unsigned int i; 178163953Srrs 179163953Srrs init = &cp->init; 180163953Srrs asoc = &stcb->asoc; 181163953Srrs /* save off parameters */ 182163953Srrs asoc->peer_vtag = ntohl(init->initiate_tag); 183163953Srrs asoc->peers_rwnd = ntohl(init->a_rwnd); 184163953Srrs if (TAILQ_FIRST(&asoc->nets)) { 185163953Srrs /* update any ssthresh's that may have a default */ 186163953Srrs TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 187163953Srrs lnet->ssthresh = asoc->peers_rwnd; 188163953Srrs 189163953Srrs#if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING) 190163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION); 191163953Srrs#endif 192163953Srrs 193163953Srrs } 194163953Srrs } 195164181Srrs SCTP_TCB_SEND_LOCK(stcb); 196163953Srrs if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) { 197163953Srrs unsigned int newcnt; 198163953Srrs struct sctp_stream_out *outs; 199163953Srrs struct sctp_stream_queue_pending *sp; 200163953Srrs 201163953Srrs /* cut back on number of streams */ 202163953Srrs newcnt = ntohs(init->num_inbound_streams); 203163953Srrs /* This if is probably not needed but I am cautious */ 204163953Srrs if (asoc->strmout) { 205163953Srrs /* First make sure no data chunks are trapped */ 206163953Srrs for (i = newcnt; i < asoc->pre_open_streams; i++) { 207163953Srrs outs = &asoc->strmout[i]; 208163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 209163953Srrs while (sp) { 210163953Srrs TAILQ_REMOVE(&outs->outqueue, sp, 211163953Srrs next); 212163953Srrs asoc->stream_queue_cnt--; 213163953Srrs sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, 214163953Srrs stcb, SCTP_NOTIFY_DATAGRAM_UNSENT, 215163953Srrs sp); 216163953Srrs if (sp->data) { 217163953Srrs sctp_m_freem(sp->data); 218163953Srrs sp->data = NULL; 219163953Srrs } 220163953Srrs sctp_free_remote_addr(sp->net); 221163953Srrs sp->net = NULL; 222163953Srrs /* Free the chunk */ 223169420Srrs SCTP_PRINTF("sp:%p tcb:%p weird free case\n", 224163979Sru sp, stcb); 225163953Srrs 226163953Srrs sctp_free_a_strmoq(stcb, sp); 227169655Srrs /* sa_ignore FREED_MEMORY */ 228163953Srrs sp = TAILQ_FIRST(&outs->outqueue); 229163953Srrs } 230163953Srrs } 231163953Srrs } 232163953Srrs /* cut back the count and abandon the upper streams */ 233163953Srrs asoc->pre_open_streams = newcnt; 234163953Srrs } 235164181Srrs SCTP_TCB_SEND_UNLOCK(stcb); 236163953Srrs asoc->streamoutcnt = asoc->pre_open_streams; 237163953Srrs /* init tsn's */ 238163953Srrs asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1; 239163953Srrs#ifdef SCTP_MAP_LOGGING 240163953Srrs sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 241163953Srrs#endif 242163953Srrs /* This is the next one we expect */ 243163953Srrs asoc->str_reset_seq_in = asoc->asconf_seq_in + 1; 244163953Srrs 245163953Srrs asoc->mapping_array_base_tsn = ntohl(init->initial_tsn); 246163953Srrs asoc->cumulative_tsn = asoc->asconf_seq_in; 247163953Srrs asoc->last_echo_tsn = asoc->asconf_seq_in; 248163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 249163953Srrs /* open the requested streams */ 250170091Srrs 251163953Srrs if (asoc->strmin != NULL) { 252163953Srrs /* Free the old ones */ 253164181Srrs struct sctp_queued_to_read *ctl; 254164181Srrs 255164181Srrs for (i = 0; i < asoc->streamincnt; i++) { 256164181Srrs ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 257164181Srrs while (ctl) { 258164181Srrs TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 259164181Srrs sctp_free_remote_addr(ctl->whoFrom); 260164181Srrs sctp_m_freem(ctl->data); 261164181Srrs ctl->data = NULL; 262164181Srrs sctp_free_a_readq(stcb, ctl); 263164181Srrs ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 264164181Srrs } 265164181Srrs } 266170091Srrs SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 267163953Srrs } 268164181Srrs asoc->streamincnt = ntohs(init->num_outbound_streams); 269164181Srrs if (asoc->streamincnt > MAX_SCTP_STREAMS) { 270164181Srrs asoc->streamincnt = MAX_SCTP_STREAMS; 271164181Srrs } 272163953Srrs SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt * 273170091Srrs sizeof(struct sctp_stream_in), SCTP_M_STRMI); 274163953Srrs if (asoc->strmin == NULL) { 275163953Srrs /* we didn't get memory for the streams! */ 276169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n"); 277163953Srrs return (-1); 278163953Srrs } 279163953Srrs for (i = 0; i < asoc->streamincnt; i++) { 280163953Srrs asoc->strmin[i].stream_no = i; 281163953Srrs asoc->strmin[i].last_sequence_delivered = 0xffff; 282163953Srrs /* 283163953Srrs * U-stream ranges will be set when the cookie is unpacked. 284163953Srrs * Or for the INIT sender they are un set (if pr-sctp not 285163953Srrs * supported) when the INIT-ACK arrives. 286163953Srrs */ 287163953Srrs TAILQ_INIT(&asoc->strmin[i].inqueue); 288168943Srrs asoc->strmin[i].delivery_started = 0; 289163953Srrs } 290163953Srrs /* 291163953Srrs * load_address_from_init will put the addresses into the 292163953Srrs * association when the COOKIE is processed or the INIT-ACK is 293163953Srrs * processed. Both types of COOKIE's existing and new call this 294163953Srrs * routine. It will remove addresses that are no longer in the 295163953Srrs * association (for the restarting case where addresses are 296163953Srrs * removed). Up front when the INIT arrives we will discard it if it 297163953Srrs * is a restart and new addresses have been added. 298163953Srrs */ 299169655Srrs /* sa_ignore MEMLEAK */ 300163953Srrs return (0); 301163953Srrs} 302163953Srrs 303163953Srrs/* 304163953Srrs * INIT-ACK message processing/consumption returns value < 0 on error 305163953Srrs */ 306163953Srrsstatic int 307163953Srrssctp_process_init_ack(struct mbuf *m, int iphlen, int offset, 308163953Srrs struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 309169352Srrs struct sctp_nets *net, int *abort_no_unlock, uint32_t vrf_id, 310169352Srrs uint32_t table_id) 311163953Srrs{ 312163953Srrs struct sctp_association *asoc; 313163953Srrs struct mbuf *op_err; 314163953Srrs int retval, abort_flag; 315163953Srrs uint32_t initack_limit; 316163953Srrs 317163953Srrs /* First verify that we have no illegal param's */ 318163953Srrs abort_flag = 0; 319163953Srrs op_err = NULL; 320163953Srrs 321163953Srrs op_err = sctp_arethere_unrecognized_parameters(m, 322163953Srrs (offset + sizeof(struct sctp_init_chunk)), 323163953Srrs &abort_flag, (struct sctp_chunkhdr *)cp); 324163953Srrs if (abort_flag) { 325163953Srrs /* Send an abort and notify peer */ 326170056Srrs sctp_abort_an_association(stcb->sctp_ep, stcb, SCTP_CAUSE_PROTOCOL_VIOLATION, op_err); 327170056Srrs *abort_no_unlock = 1; 328163953Srrs return (-1); 329163953Srrs } 330163953Srrs asoc = &stcb->asoc; 331163953Srrs /* process the peer's parameters in the INIT-ACK */ 332163953Srrs retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb, net); 333163953Srrs if (retval < 0) { 334163953Srrs return (retval); 335163953Srrs } 336163953Srrs initack_limit = offset + ntohs(cp->ch.chunk_length); 337163953Srrs /* load all addresses */ 338163953Srrs if ((retval = sctp_load_addresses_from_init(stcb, m, iphlen, 339163953Srrs (offset + sizeof(struct sctp_init_chunk)), initack_limit, sh, 340163953Srrs NULL))) { 341163953Srrs /* Huh, we should abort */ 342169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 343169420Srrs "Load addresses from INIT causes an abort %d\n", 344169420Srrs retval); 345163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 346169352Srrs NULL, 0, 0); 347168299Srrs *abort_no_unlock = 1; 348163953Srrs return (-1); 349163953Srrs } 350163953Srrs stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs, 351163953Srrs stcb->asoc.local_hmacs); 352163953Srrs if (op_err) { 353163953Srrs sctp_queue_op_err(stcb, op_err); 354163953Srrs /* queuing will steal away the mbuf chain to the out queue */ 355163953Srrs op_err = NULL; 356163953Srrs } 357163953Srrs /* extract the cookie and queue it to "echo" it back... */ 358163953Srrs stcb->asoc.overall_error_count = 0; 359163953Srrs net->error_count = 0; 360163953Srrs 361163953Srrs /* 362163953Srrs * Cancel the INIT timer, We do this first before queueing the 363163953Srrs * cookie. We always cancel at the primary to assue that we are 364163953Srrs * canceling the timer started by the INIT which always goes to the 365163953Srrs * primary. 366163953Srrs */ 367163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb, 368165220Srrs asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4); 369163953Srrs 370165220Srrs /* calculate the RTO */ 371165220Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered); 372165220Srrs 373163953Srrs retval = sctp_send_cookie_echo(m, offset, stcb, net); 374163953Srrs if (retval < 0) { 375163953Srrs /* 376163953Srrs * No cookie, we probably should send a op error. But in any 377163953Srrs * case if there is no cookie in the INIT-ACK, we can 378163953Srrs * abandon the peer, its broke. 379163953Srrs */ 380163953Srrs if (retval == -3) { 381163953Srrs /* We abort with an error of missing mandatory param */ 382163953Srrs op_err = 383163953Srrs sctp_generate_invmanparam(SCTP_CAUSE_MISSING_PARAM); 384163953Srrs if (op_err) { 385163953Srrs /* 386163953Srrs * Expand beyond to include the mandatory 387163953Srrs * param cookie 388163953Srrs */ 389163953Srrs struct sctp_inv_mandatory_param *mp; 390163953Srrs 391165647Srrs SCTP_BUF_LEN(op_err) = 392163953Srrs sizeof(struct sctp_inv_mandatory_param); 393163953Srrs mp = mtod(op_err, 394163953Srrs struct sctp_inv_mandatory_param *); 395163953Srrs /* Subtract the reserved param */ 396163953Srrs mp->length = 397163953Srrs htons(sizeof(struct sctp_inv_mandatory_param) - 2); 398163953Srrs mp->num_param = htonl(1); 399163953Srrs mp->param = htons(SCTP_STATE_COOKIE); 400163953Srrs mp->resv = 0; 401163953Srrs } 402163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, 403169352Srrs sh, op_err, 0, 0); 404168299Srrs *abort_no_unlock = 1; 405163953Srrs } 406163953Srrs return (retval); 407163953Srrs } 408163953Srrs return (0); 409163953Srrs} 410163953Srrs 411163953Srrsstatic void 412163953Srrssctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp, 413163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 414163953Srrs{ 415163953Srrs struct sockaddr_storage store; 416163953Srrs struct sockaddr_in *sin; 417163953Srrs struct sockaddr_in6 *sin6; 418163953Srrs struct sctp_nets *r_net; 419163953Srrs struct timeval tv; 420163953Srrs 421163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) { 422163953Srrs /* Invalid length */ 423163953Srrs return; 424163953Srrs } 425163953Srrs sin = (struct sockaddr_in *)&store; 426163953Srrs sin6 = (struct sockaddr_in6 *)&store; 427163953Srrs 428163953Srrs memset(&store, 0, sizeof(store)); 429163953Srrs if (cp->heartbeat.hb_info.addr_family == AF_INET && 430163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) { 431163953Srrs sin->sin_family = cp->heartbeat.hb_info.addr_family; 432163953Srrs sin->sin_len = cp->heartbeat.hb_info.addr_len; 433163953Srrs sin->sin_port = stcb->rport; 434163953Srrs memcpy(&sin->sin_addr, cp->heartbeat.hb_info.address, 435163953Srrs sizeof(sin->sin_addr)); 436163953Srrs } else if (cp->heartbeat.hb_info.addr_family == AF_INET6 && 437163953Srrs cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) { 438163953Srrs sin6->sin6_family = cp->heartbeat.hb_info.addr_family; 439163953Srrs sin6->sin6_len = cp->heartbeat.hb_info.addr_len; 440163953Srrs sin6->sin6_port = stcb->rport; 441163953Srrs memcpy(&sin6->sin6_addr, cp->heartbeat.hb_info.address, 442163953Srrs sizeof(sin6->sin6_addr)); 443163953Srrs } else { 444163953Srrs return; 445163953Srrs } 446163953Srrs r_net = sctp_findnet(stcb, (struct sockaddr *)sin); 447163953Srrs if (r_net == NULL) { 448169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n"); 449163953Srrs return; 450163953Srrs } 451163953Srrs if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) && 452163953Srrs (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) && 453163953Srrs (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) { 454163953Srrs /* 455163953Srrs * If the its a HB and it's random value is correct when can 456163953Srrs * confirm the destination. 457163953Srrs */ 458163953Srrs r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 459167598Srrs if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) { 460167598Srrs stcb->asoc.primary_destination = r_net; 461167598Srrs r_net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 462167598Srrs r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY; 463167598Srrs r_net = TAILQ_FIRST(&stcb->asoc.nets); 464167598Srrs if (r_net != stcb->asoc.primary_destination) { 465167598Srrs /* 466167598Srrs * first one on the list is NOT the primary 467167598Srrs * sctp_cmpaddr() is much more efficent if 468167598Srrs * the primary is the first on the list, 469167598Srrs * make it so. 470167598Srrs */ 471167598Srrs TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 472167598Srrs TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 473167598Srrs } 474167598Srrs } 475163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 476163953Srrs stcb, 0, (void *)r_net); 477163953Srrs } 478163953Srrs r_net->error_count = 0; 479163953Srrs r_net->hb_responded = 1; 480163953Srrs tv.tv_sec = cp->heartbeat.hb_info.time_value_1; 481163953Srrs tv.tv_usec = cp->heartbeat.hb_info.time_value_2; 482163953Srrs if (r_net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 483163953Srrs r_net->dest_state &= ~SCTP_ADDR_NOT_REACHABLE; 484163953Srrs r_net->dest_state |= SCTP_ADDR_REACHABLE; 485163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 486163953Srrs SCTP_HEARTBEAT_SUCCESS, (void *)r_net); 487163953Srrs /* now was it the primary? if so restore */ 488163953Srrs if (r_net->dest_state & SCTP_ADDR_WAS_PRIMARY) { 489169420Srrs (void)sctp_set_primary_addr(stcb, (struct sockaddr *)NULL, r_net); 490163953Srrs } 491163953Srrs } 492163953Srrs /* Now lets do a RTO with this */ 493163953Srrs r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv); 494163953Srrs} 495163953Srrs 496163953Srrsstatic void 497163953Srrssctp_handle_abort(struct sctp_abort_chunk *cp, 498163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 499163953Srrs{ 500169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n"); 501163953Srrs if (stcb == NULL) 502163953Srrs return; 503163953Srrs 504163953Srrs /* stop any receive timers */ 505165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5); 506163953Srrs /* notify user of the abort and clean up... */ 507163953Srrs sctp_abort_notification(stcb, 0); 508163953Srrs /* free the tcb */ 509163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_aborted); 510163953Srrs if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 511163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 512163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 513163953Srrs } 514168859Srrs#ifdef SCTP_ASOCLOG_OF_TSNS 515168859Srrs sctp_print_out_track_log(stcb); 516168859Srrs#endif 517165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_6); 518169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n"); 519163953Srrs} 520163953Srrs 521163953Srrsstatic void 522163953Srrssctp_handle_shutdown(struct sctp_shutdown_chunk *cp, 523163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag) 524163953Srrs{ 525163953Srrs struct sctp_association *asoc; 526163953Srrs int some_on_streamwheel; 527163953Srrs 528169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 529169420Srrs "sctp_handle_shutdown: handling SHUTDOWN\n"); 530163953Srrs if (stcb == NULL) 531163953Srrs return; 532165220Srrs asoc = &stcb->asoc; 533165220Srrs if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 534165220Srrs (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 535163953Srrs return; 536163953Srrs } 537163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) { 538163953Srrs /* Shutdown NOT the expected size */ 539163953Srrs return; 540163953Srrs } else { 541163953Srrs sctp_update_acked(stcb, cp, net, abort_flag); 542163953Srrs } 543165220Srrs if (asoc->control_pdapi) { 544163953Srrs /* 545163953Srrs * With a normal shutdown we assume the end of last record. 546163953Srrs */ 547163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 548165220Srrs asoc->control_pdapi->end_added = 1; 549165220Srrs asoc->control_pdapi->pdapi_aborted = 1; 550165220Srrs asoc->control_pdapi = NULL; 551163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 552163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 553163953Srrs } 554163953Srrs /* goto SHUTDOWN_RECEIVED state to block new requests */ 555163953Srrs if (stcb->sctp_socket) { 556163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 557170056Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) && 558163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) { 559163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_RECEIVED; 560163953Srrs /* 561163953Srrs * notify upper layer that peer has initiated a 562163953Srrs * shutdown 563163953Srrs */ 564163953Srrs sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL); 565163953Srrs 566163953Srrs /* reset time */ 567169378Srrs (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 568163953Srrs } 569163953Srrs } 570163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) { 571163953Srrs /* 572163953Srrs * stop the shutdown timer, since we WILL move to 573163953Srrs * SHUTDOWN-ACK-SENT. 574163953Srrs */ 575165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_7); 576163953Srrs } 577163953Srrs /* Now are we there yet? */ 578163953Srrs some_on_streamwheel = 0; 579163953Srrs if (!TAILQ_EMPTY(&asoc->out_wheel)) { 580163953Srrs /* Check to see if some data queued */ 581163953Srrs struct sctp_stream_out *outs; 582163953Srrs 583163953Srrs TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) { 584163953Srrs if (!TAILQ_EMPTY(&outs->outqueue)) { 585163953Srrs some_on_streamwheel = 1; 586163953Srrs break; 587163953Srrs } 588163953Srrs } 589163953Srrs } 590163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 591163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 592163953Srrs some_on_streamwheel) { 593163953Srrs /* By returning we will push more data out */ 594163953Srrs return; 595163953Srrs } else { 596163953Srrs /* no outstanding data to send, so move on... */ 597163953Srrs /* send SHUTDOWN-ACK */ 598163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 599163953Srrs /* move to SHUTDOWN-ACK-SENT state */ 600166675Srrs if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 601166675Srrs (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 602163953Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 603163953Srrs } 604163953Srrs asoc->state = SCTP_STATE_SHUTDOWN_ACK_SENT; 605163953Srrs 606163953Srrs /* start SHUTDOWN timer */ 607163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, 608163953Srrs stcb, net); 609163953Srrs } 610163953Srrs} 611163953Srrs 612163953Srrsstatic void 613163953Srrssctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp, 614163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 615163953Srrs{ 616163953Srrs struct sctp_association *asoc; 617163953Srrs 618169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 619169420Srrs "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n"); 620163953Srrs if (stcb == NULL) 621163953Srrs return; 622163953Srrs 623163953Srrs asoc = &stcb->asoc; 624163953Srrs /* process according to association state */ 625163953Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 626163953Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 627163953Srrs /* unexpected SHUTDOWN-ACK... so ignore... */ 628163953Srrs SCTP_TCB_UNLOCK(stcb); 629163953Srrs return; 630163953Srrs } 631165220Srrs if (asoc->control_pdapi) { 632163953Srrs /* 633163953Srrs * With a normal shutdown we assume the end of last record. 634163953Srrs */ 635163953Srrs SCTP_INP_READ_LOCK(stcb->sctp_ep); 636165220Srrs asoc->control_pdapi->end_added = 1; 637165220Srrs asoc->control_pdapi->pdapi_aborted = 1; 638165220Srrs asoc->control_pdapi = NULL; 639163953Srrs SCTP_INP_READ_UNLOCK(stcb->sctp_ep); 640163996Srrs sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); 641163953Srrs } 642163953Srrs /* are the queues empty? */ 643163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 644163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 645163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 646164205Srrs sctp_report_all_outbound(stcb, 0); 647163953Srrs } 648163953Srrs /* stop the timer */ 649165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_8); 650163953Srrs /* send SHUTDOWN-COMPLETE */ 651163953Srrs sctp_send_shutdown_complete(stcb, net); 652163953Srrs /* notify upper layer protocol */ 653163953Srrs if (stcb->sctp_socket) { 654163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 655163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 656163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 657163953Srrs /* Set the connected flag to disconnected */ 658163953Srrs stcb->sctp_ep->sctp_socket->so_snd.sb_cc = 0; 659163953Srrs } 660163953Srrs } 661163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 662163953Srrs /* free the TCB but first save off the ep */ 663165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, 664165220Srrs SCTP_FROM_SCTP_INPUT + SCTP_LOC_9); 665163953Srrs} 666163953Srrs 667163953Srrs/* 668163953Srrs * Skip past the param header and then we will find the chunk that caused the 669163953Srrs * problem. There are two possiblities ASCONF or FWD-TSN other than that and 670163953Srrs * our peer must be broken. 671163953Srrs */ 672163953Srrsstatic void 673163953Srrssctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr, 674163953Srrs struct sctp_nets *net) 675163953Srrs{ 676163953Srrs struct sctp_chunkhdr *chk; 677163953Srrs 678163953Srrs chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr)); 679163953Srrs switch (chk->chunk_type) { 680163953Srrs case SCTP_ASCONF_ACK: 681163953Srrs case SCTP_ASCONF: 682163953Srrs sctp_asconf_cleanup(stcb, net); 683163953Srrs break; 684163953Srrs case SCTP_FORWARD_CUM_TSN: 685163953Srrs stcb->asoc.peer_supports_prsctp = 0; 686163953Srrs break; 687163953Srrs default: 688169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 689169420Srrs "Peer does not support chunk type %d(%x)??\n", 690169420Srrs chk->chunk_type, (uint32_t) chk->chunk_type); 691163953Srrs break; 692163953Srrs } 693163953Srrs} 694163953Srrs 695163953Srrs/* 696163953Srrs * Skip past the param header and then we will find the param that caused the 697163953Srrs * problem. There are a number of param's in a ASCONF OR the prsctp param 698163953Srrs * these will turn of specific features. 699163953Srrs */ 700163953Srrsstatic void 701163953Srrssctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr) 702163953Srrs{ 703163953Srrs struct sctp_paramhdr *pbad; 704163953Srrs 705163953Srrs pbad = phdr + 1; 706163953Srrs switch (ntohs(pbad->param_type)) { 707163953Srrs /* pr-sctp draft */ 708163953Srrs case SCTP_PRSCTP_SUPPORTED: 709163953Srrs stcb->asoc.peer_supports_prsctp = 0; 710163953Srrs break; 711163953Srrs case SCTP_SUPPORTED_CHUNK_EXT: 712163953Srrs break; 713163953Srrs /* draft-ietf-tsvwg-addip-sctp */ 714163953Srrs case SCTP_ECN_NONCE_SUPPORTED: 715163953Srrs stcb->asoc.peer_supports_ecn_nonce = 0; 716163953Srrs stcb->asoc.ecn_nonce_allowed = 0; 717163953Srrs stcb->asoc.ecn_allowed = 0; 718163953Srrs break; 719163953Srrs case SCTP_ADD_IP_ADDRESS: 720163953Srrs case SCTP_DEL_IP_ADDRESS: 721163953Srrs case SCTP_SET_PRIM_ADDR: 722163953Srrs stcb->asoc.peer_supports_asconf = 0; 723163953Srrs break; 724163953Srrs case SCTP_SUCCESS_REPORT: 725163953Srrs case SCTP_ERROR_CAUSE_IND: 726169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n"); 727169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 728169420Srrs "Turning off ASCONF to this strange peer\n"); 729163953Srrs stcb->asoc.peer_supports_asconf = 0; 730163953Srrs break; 731163953Srrs default: 732169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 733169420Srrs "Peer does not support param type %d(%x)??\n", 734169420Srrs pbad->param_type, (uint32_t) pbad->param_type); 735163953Srrs break; 736163953Srrs } 737163953Srrs} 738163953Srrs 739163953Srrsstatic int 740163953Srrssctp_handle_error(struct sctp_chunkhdr *ch, 741163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 742163953Srrs{ 743163953Srrs int chklen; 744163953Srrs struct sctp_paramhdr *phdr; 745163953Srrs uint16_t error_type; 746163953Srrs uint16_t error_len; 747163953Srrs struct sctp_association *asoc; 748163953Srrs 749163953Srrs int adjust; 750163953Srrs 751163953Srrs /* parse through all of the errors and process */ 752163953Srrs asoc = &stcb->asoc; 753163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)ch + 754163953Srrs sizeof(struct sctp_chunkhdr)); 755163953Srrs chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr); 756163953Srrs while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) { 757163953Srrs /* Process an Error Cause */ 758163953Srrs error_type = ntohs(phdr->param_type); 759163953Srrs error_len = ntohs(phdr->param_length); 760163953Srrs if ((error_len > chklen) || (error_len == 0)) { 761163953Srrs /* invalid param length for this param */ 762169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in error param- chunk left:%d errorlen:%d\n", 763169420Srrs chklen, error_len); 764163953Srrs return (0); 765163953Srrs } 766163953Srrs switch (error_type) { 767163953Srrs case SCTP_CAUSE_INVALID_STREAM: 768163953Srrs case SCTP_CAUSE_MISSING_PARAM: 769163953Srrs case SCTP_CAUSE_INVALID_PARAM: 770163953Srrs case SCTP_CAUSE_NO_USER_DATA: 771169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %d back? We have a bug :/ (or do they?)\n", 772169420Srrs error_type); 773163953Srrs break; 774163953Srrs case SCTP_CAUSE_STALE_COOKIE: 775163953Srrs /* 776163953Srrs * We only act if we have echoed a cookie and are 777163953Srrs * waiting. 778163953Srrs */ 779163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 780163953Srrs int *p; 781163953Srrs 782163953Srrs p = (int *)((caddr_t)phdr + sizeof(*phdr)); 783163953Srrs /* Save the time doubled */ 784163953Srrs asoc->cookie_preserve_req = ntohl(*p) << 1; 785163953Srrs asoc->stale_cookie_count++; 786163953Srrs if (asoc->stale_cookie_count > 787163953Srrs asoc->max_init_times) { 788163953Srrs sctp_abort_notification(stcb, 0); 789163953Srrs /* now free the asoc */ 790165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_10); 791163953Srrs return (-1); 792163953Srrs } 793163953Srrs /* blast back to INIT state */ 794163953Srrs asoc->state &= ~SCTP_STATE_COOKIE_ECHOED; 795163953Srrs asoc->state |= SCTP_STATE_COOKIE_WAIT; 796163953Srrs 797163953Srrs sctp_stop_all_cookie_timers(stcb); 798163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 799163953Srrs } 800163953Srrs break; 801163953Srrs case SCTP_CAUSE_UNRESOLVABLE_ADDR: 802163953Srrs /* 803163953Srrs * Nothing we can do here, we don't do hostname 804163953Srrs * addresses so if the peer does not like my IPv6 805163953Srrs * (or IPv4 for that matter) it does not matter. If 806163953Srrs * they don't support that type of address, they can 807163953Srrs * NOT possibly get that packet type... i.e. with no 808163953Srrs * IPv6 you can't recieve a IPv6 packet. so we can 809163953Srrs * safely ignore this one. If we ever added support 810163953Srrs * for HOSTNAME Addresses, then we would need to do 811163953Srrs * something here. 812163953Srrs */ 813163953Srrs break; 814163953Srrs case SCTP_CAUSE_UNRECOG_CHUNK: 815163953Srrs sctp_process_unrecog_chunk(stcb, phdr, net); 816163953Srrs break; 817163953Srrs case SCTP_CAUSE_UNRECOG_PARAM: 818163953Srrs sctp_process_unrecog_param(stcb, phdr); 819163953Srrs break; 820163953Srrs case SCTP_CAUSE_COOKIE_IN_SHUTDOWN: 821163953Srrs /* 822163953Srrs * We ignore this since the timer will drive out a 823163953Srrs * new cookie anyway and there timer will drive us 824163953Srrs * to send a SHUTDOWN_COMPLETE. We can't send one 825163953Srrs * here since we don't have their tag. 826163953Srrs */ 827163953Srrs break; 828163953Srrs case SCTP_CAUSE_DELETING_LAST_ADDR: 829163953Srrs case SCTP_CAUSE_RESOURCE_SHORTAGE: 830163953Srrs case SCTP_CAUSE_DELETING_SRC_ADDR: 831163953Srrs /* 832163953Srrs * We should NOT get these here, but in a 833166086Srrs * ASCONF-ACK. 834163953Srrs */ 835169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a Operational Error?<%d>?\n", 836169420Srrs error_type); 837163953Srrs break; 838163953Srrs case SCTP_CAUSE_OUT_OF_RESC: 839163953Srrs /* 840163953Srrs * And what, pray tell do we do with the fact that 841163953Srrs * the peer is out of resources? Not really sure we 842166086Srrs * could do anything but abort. I suspect this 843163953Srrs * should have came WITH an abort instead of in a 844163953Srrs * OP-ERROR. 845163953Srrs */ 846163953Srrs break; 847163953Srrs default: 848169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown error type = 0x%xh\n", 849169420Srrs error_type); 850163953Srrs break; 851163953Srrs } 852163953Srrs adjust = SCTP_SIZE32(error_len); 853163953Srrs chklen -= adjust; 854163953Srrs phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust); 855163953Srrs } 856163953Srrs return (0); 857163953Srrs} 858163953Srrs 859163953Srrsstatic int 860169352Srrssctp_handle_init_ack(struct mbuf *m, int iphlen, int offset, 861169352Srrs struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, 862169352Srrs struct sctp_nets *net, int *abort_no_unlock, uint32_t vrf_id, 863169352Srrs uint32_t table_id) 864163953Srrs{ 865163953Srrs struct sctp_init_ack *init_ack; 866163953Srrs int *state; 867163953Srrs struct mbuf *op_err; 868163953Srrs 869169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 870169420Srrs "sctp_handle_init_ack: handling INIT-ACK\n"); 871169420Srrs 872163953Srrs if (stcb == NULL) { 873169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 874169420Srrs "sctp_handle_init_ack: TCB is null\n"); 875163953Srrs return (-1); 876163953Srrs } 877163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) { 878163953Srrs /* Invalid length */ 879163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 880163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 881169352Srrs op_err, 0, 0); 882168299Srrs *abort_no_unlock = 1; 883163953Srrs return (-1); 884163953Srrs } 885163953Srrs init_ack = &cp->init; 886163953Srrs /* validate parameters */ 887163953Srrs if (init_ack->initiate_tag == 0) { 888163953Srrs /* protocol error... send an abort */ 889163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 890163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 891169352Srrs op_err, 0, 0); 892168299Srrs *abort_no_unlock = 1; 893163953Srrs return (-1); 894163953Srrs } 895163953Srrs if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) { 896163953Srrs /* protocol error... send an abort */ 897163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 898163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 899169352Srrs op_err, 0, 0); 900168299Srrs *abort_no_unlock = 1; 901163953Srrs return (-1); 902163953Srrs } 903163953Srrs if (init_ack->num_inbound_streams == 0) { 904163953Srrs /* protocol error... send an abort */ 905163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 906163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 907169352Srrs op_err, 0, 0); 908168299Srrs *abort_no_unlock = 1; 909163953Srrs return (-1); 910163953Srrs } 911163953Srrs if (init_ack->num_outbound_streams == 0) { 912163953Srrs /* protocol error... send an abort */ 913163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_INVALID_PARAM); 914163953Srrs sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen, sh, 915169352Srrs op_err, 0, 0); 916168299Srrs *abort_no_unlock = 1; 917163953Srrs return (-1); 918163953Srrs } 919163953Srrs /* process according to association state... */ 920163953Srrs state = &stcb->asoc.state; 921163953Srrs switch (*state & SCTP_STATE_MASK) { 922163953Srrs case SCTP_STATE_COOKIE_WAIT: 923163953Srrs /* this is the expected state for this chunk */ 924163953Srrs /* process the INIT-ACK parameters */ 925163953Srrs if (stcb->asoc.primary_destination->dest_state & 926163953Srrs SCTP_ADDR_UNCONFIRMED) { 927163953Srrs /* 928163953Srrs * The primary is where we sent the INIT, we can 929163953Srrs * always consider it confirmed when the INIT-ACK is 930163953Srrs * returned. Do this before we load addresses 931163953Srrs * though. 932163953Srrs */ 933163953Srrs stcb->asoc.primary_destination->dest_state &= 934163953Srrs ~SCTP_ADDR_UNCONFIRMED; 935163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 936163953Srrs stcb, 0, (void *)stcb->asoc.primary_destination); 937163953Srrs } 938169352Srrs if (sctp_process_init_ack(m, iphlen, offset, sh, cp, stcb, 939169352Srrs net, abort_no_unlock, vrf_id, 940169352Srrs table_id) < 0) { 941163953Srrs /* error in parsing parameters */ 942163953Srrs return (-1); 943163953Srrs } 944163953Srrs /* update our state */ 945169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n"); 946163953Srrs if (*state & SCTP_STATE_SHUTDOWN_PENDING) { 947163953Srrs *state = SCTP_STATE_COOKIE_ECHOED | 948163953Srrs SCTP_STATE_SHUTDOWN_PENDING; 949163953Srrs } else { 950163953Srrs *state = SCTP_STATE_COOKIE_ECHOED; 951163953Srrs } 952163953Srrs 953163953Srrs /* reset the RTO calc */ 954163953Srrs stcb->asoc.overall_error_count = 0; 955169378Srrs (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 956163953Srrs /* 957163953Srrs * collapse the init timer back in case of a exponential 958165220Srrs * backoff 959163953Srrs */ 960163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep, 961163953Srrs stcb, net); 962163953Srrs /* 963163953Srrs * the send at the end of the inbound data processing will 964163953Srrs * cause the cookie to be sent 965163953Srrs */ 966163953Srrs break; 967163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 968163953Srrs /* incorrect state... discard */ 969163953Srrs break; 970163953Srrs case SCTP_STATE_COOKIE_ECHOED: 971163953Srrs /* incorrect state... discard */ 972163953Srrs break; 973163953Srrs case SCTP_STATE_OPEN: 974163953Srrs /* incorrect state... discard */ 975163953Srrs break; 976163953Srrs case SCTP_STATE_EMPTY: 977163953Srrs case SCTP_STATE_INUSE: 978163953Srrs default: 979163953Srrs /* incorrect state... discard */ 980163953Srrs return (-1); 981163953Srrs break; 982163953Srrs } 983169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n"); 984163953Srrs return (0); 985163953Srrs} 986163953Srrs 987163953Srrs 988163953Srrs/* 989163953Srrs * handle a state cookie for an existing association m: input packet mbuf 990163953Srrs * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a 991163953Srrs * "split" mbuf and the cookie signature does not exist offset: offset into 992163953Srrs * mbuf to the cookie-echo chunk 993163953Srrs */ 994163953Srrsstatic struct sctp_tcb * 995163953Srrssctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset, 996163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 997163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 998169352Srrs struct sockaddr *init_src, int *notification, sctp_assoc_t * sac_assoc_id, 999169352Srrs uint32_t vrf_id, uint32_t table_id) 1000163953Srrs{ 1001163953Srrs struct sctp_association *asoc; 1002163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1003163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1004163953Srrs int chk_length; 1005165220Srrs int init_offset, initack_offset, i; 1006163953Srrs int retval; 1007164205Srrs int spec_flag = 0; 1008166023Srrs int how_indx; 1009163953Srrs 1010163953Srrs /* I know that the TCB is non-NULL from the caller */ 1011163953Srrs asoc = &stcb->asoc; 1012166675Srrs for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) { 1013166023Srrs if (asoc->cookie_how[how_indx] == 0) 1014166023Srrs break; 1015166023Srrs } 1016166023Srrs if (how_indx < sizeof(asoc->cookie_how)) { 1017166023Srrs asoc->cookie_how[how_indx] = 1; 1018166023Srrs } 1019163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) { 1020163953Srrs /* SHUTDOWN came in after sending INIT-ACK */ 1021163953Srrs struct mbuf *op_err; 1022163953Srrs struct sctp_paramhdr *ph; 1023163953Srrs 1024163953Srrs sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination); 1025163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 1026165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 1027163953Srrs if (op_err == NULL) { 1028163953Srrs /* FOOBAR */ 1029163953Srrs return (NULL); 1030163953Srrs } 1031163953Srrs /* pre-reserve some space */ 1032165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 1033165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 1034165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 1035163953Srrs /* Set the len */ 1036165647Srrs SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 1037163953Srrs ph = mtod(op_err, struct sctp_paramhdr *); 1038163953Srrs ph->param_type = htons(SCTP_CAUSE_COOKIE_IN_SHUTDOWN); 1039163953Srrs ph->param_length = htons(sizeof(struct sctp_paramhdr)); 1040169352Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag, 1041169352Srrs vrf_id, table_id); 1042166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1043166023Srrs asoc->cookie_how[how_indx] = 2; 1044163953Srrs return (NULL); 1045163953Srrs } 1046163953Srrs /* 1047163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1048163953Srrs * INIT should start after the cookie-echo header struct (chunk 1049163953Srrs * header, state cookie header struct) 1050163953Srrs */ 1051163953Srrs init_offset = offset += sizeof(struct sctp_cookie_echo_chunk); 1052163953Srrs 1053163953Srrs init_cp = (struct sctp_init_chunk *) 1054163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1055163953Srrs (uint8_t *) & init_buf); 1056163953Srrs if (init_cp == NULL) { 1057163953Srrs /* could not pull a INIT chunk in cookie */ 1058163953Srrs return (NULL); 1059163953Srrs } 1060163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1061163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1062163953Srrs return (NULL); 1063163953Srrs } 1064163953Srrs /* 1065163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1066163953Srrs * INIT-ACK follows the INIT chunk 1067163953Srrs */ 1068163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1069163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1070163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1071163953Srrs (uint8_t *) & initack_buf); 1072163953Srrs if (initack_cp == NULL) { 1073163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1074163953Srrs return (NULL); 1075163953Srrs } 1076163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1077163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1078163953Srrs return (NULL); 1079163953Srrs } 1080163953Srrs if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) && 1081163953Srrs (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) { 1082163953Srrs /* 1083163953Srrs * case D in Section 5.2.4 Table 2: MMAA process accordingly 1084163953Srrs * to get into the OPEN state 1085163953Srrs */ 1086166023Srrs if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) { 1087166086Srrs#ifdef INVARIANTS 1088166023Srrs panic("Case D and non-match seq?"); 1089166086Srrs#else 1090169420Srrs SCTP_PRINTF("Case D, seq non-match %x vs %x?\n", 1091169420Srrs ntohl(initack_cp->init.initial_tsn), 1092169420Srrs asoc->init_seq_number); 1093166086Srrs#endif 1094166023Srrs } 1095163953Srrs switch SCTP_GET_STATE 1096163953Srrs (asoc) { 1097163953Srrs case SCTP_STATE_COOKIE_WAIT: 1098166023Srrs case SCTP_STATE_COOKIE_ECHOED: 1099163953Srrs /* 1100169352Srrs * INIT was sent but got a COOKIE_ECHO with the 1101166023Srrs * correct tags... just accept it...but we must 1102166023Srrs * process the init so that we can make sure we have 1103166023Srrs * the right seq no's. 1104163953Srrs */ 1105163953Srrs /* First we must process the INIT !! */ 1106163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1107163953Srrs if (retval < 0) { 1108166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1109166023Srrs asoc->cookie_how[how_indx] = 3; 1110163953Srrs return (NULL); 1111163953Srrs } 1112163953Srrs /* we have already processed the INIT so no problem */ 1113163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, 1114165220Srrs net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_11); 1115165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_12); 1116163953Srrs /* update current state */ 1117166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) 1118166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1119166675Srrs else 1120166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1121163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1122166675Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1123163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1124163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1125163953Srrs 1126166675Srrs } else { 1127163953Srrs /* if ok, move to OPEN state */ 1128163953Srrs asoc->state = SCTP_STATE_OPEN; 1129163953Srrs } 1130166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1131165220Srrs sctp_stop_all_cookie_timers(stcb); 1132163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1133163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1134163953Srrs (inp->sctp_socket->so_qlimit == 0) 1135163953Srrs ) { 1136163953Srrs /* 1137163953Srrs * Here is where collision would go if we 1138163953Srrs * did a connect() and instead got a 1139163953Srrs * init/init-ack/cookie done before the 1140163953Srrs * init-ack came back.. 1141163953Srrs */ 1142163953Srrs stcb->sctp_ep->sctp_flags |= 1143163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1144163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1145163953Srrs } 1146163953Srrs /* notify upper layer */ 1147163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1148163953Srrs /* 1149163953Srrs * since we did not send a HB make sure we don't 1150163953Srrs * double things 1151163953Srrs */ 1152163953Srrs net->hb_responded = 1; 1153163953Srrs 1154163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1155163953Srrs (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) { 1156163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 1157163953Srrs inp, stcb, NULL); 1158163953Srrs } 1159163953Srrs break; 1160163953Srrs default: 1161163953Srrs /* 1162163953Srrs * we're in the OPEN state (or beyond), so peer must 1163163953Srrs * have simply lost the COOKIE-ACK 1164163953Srrs */ 1165163953Srrs break; 1166163953Srrs } /* end switch */ 1167165220Srrs sctp_stop_all_cookie_timers(stcb); 1168163953Srrs /* 1169163953Srrs * We ignore the return code here.. not sure if we should 1170163953Srrs * somehow abort.. but we do have an existing asoc. This 1171163953Srrs * really should not fail. 1172163953Srrs */ 1173163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1174163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1175163953Srrs initack_offset, sh, init_src)) { 1176166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1177166023Srrs asoc->cookie_how[how_indx] = 4; 1178163953Srrs return (NULL); 1179163953Srrs } 1180163953Srrs /* respond with a COOKIE-ACK */ 1181165220Srrs sctp_toss_old_cookies(stcb, asoc); 1182163953Srrs sctp_send_cookie_ack(stcb); 1183166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1184166023Srrs asoc->cookie_how[how_indx] = 5; 1185163953Srrs return (stcb); 1186169352Srrs } 1187163953Srrs if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1188163953Srrs ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag && 1189163953Srrs cookie->tie_tag_my_vtag == 0 && 1190163953Srrs cookie->tie_tag_peer_vtag == 0) { 1191163953Srrs /* 1192163953Srrs * case C in Section 5.2.4 Table 2: XMOO silently discard 1193163953Srrs */ 1194166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1195166023Srrs asoc->cookie_how[how_indx] = 6; 1196163953Srrs return (NULL); 1197163953Srrs } 1198163953Srrs if (ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag && 1199163953Srrs (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag || 1200163953Srrs init_cp->init.initiate_tag == 0)) { 1201163953Srrs /* 1202163953Srrs * case B in Section 5.2.4 Table 2: MXAA or MOAA my info 1203163953Srrs * should be ok, re-accept peer info 1204163953Srrs */ 1205166023Srrs if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) { 1206166023Srrs /* 1207166023Srrs * Extension of case C. If we hit this, then the 1208166023Srrs * random number generator returned the same vtag 1209166023Srrs * when we first sent our INIT-ACK and when we later 1210166023Srrs * sent our INIT. The side with the seq numbers that 1211166023Srrs * are different will be the one that normnally 1212166023Srrs * would have hit case C. This in effect "extends" 1213166023Srrs * our vtags in this collision case to be 64 bits. 1214166023Srrs * The same collision could occur aka you get both 1215166023Srrs * vtag and seq number the same twice in a row.. but 1216166023Srrs * is much less likely. If it did happen then we 1217166023Srrs * would proceed through and bring up the assoc.. we 1218166023Srrs * may end up with the wrong stream setup however.. 1219166023Srrs * which would be bad.. but there is no way to 1220166023Srrs * tell.. until we send on a stream that does not 1221166023Srrs * exist :-) 1222166023Srrs */ 1223166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1224166023Srrs asoc->cookie_how[how_indx] = 7; 1225166023Srrs 1226166023Srrs return (NULL); 1227166023Srrs } 1228166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1229166023Srrs asoc->cookie_how[how_indx] = 8; 1230165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_13); 1231163953Srrs sctp_stop_all_cookie_timers(stcb); 1232163953Srrs /* 1233163953Srrs * since we did not send a HB make sure we don't double 1234163953Srrs * things 1235163953Srrs */ 1236163953Srrs net->hb_responded = 1; 1237163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1238163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1239163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1240163953Srrs NULL); 1241163953Srrs } 1242163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1243164205Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1244164205Srrs 1245164205Srrs /* Note last_cwr_tsn? where is this used? */ 1246163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1247164205Srrs if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) { 1248164205Srrs /* 1249164205Srrs * Ok the peer probably discarded our data (if we 1250164205Srrs * echoed a cookie+data). So anything on the 1251164205Srrs * sent_queue should be marked for retransmit, we 1252164205Srrs * may not get something to kick us so it COULD 1253164205Srrs * still take a timeout to move these.. but it can't 1254164205Srrs * hurt to mark them. 1255164205Srrs */ 1256164205Srrs struct sctp_tmit_chunk *chk; 1257163953Srrs 1258164205Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1259164205Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 1260164205Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1261168124Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1262164205Srrs spec_flag++; 1263164205Srrs } 1264164205Srrs } 1265164205Srrs 1266164205Srrs } 1267163953Srrs /* process the INIT info (peer's info) */ 1268163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1269163953Srrs if (retval < 0) { 1270166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1271166023Srrs asoc->cookie_how[how_indx] = 9; 1272163953Srrs return (NULL); 1273163953Srrs } 1274163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1275163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1276163953Srrs initack_offset, sh, init_src)) { 1277166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1278166023Srrs asoc->cookie_how[how_indx] = 10; 1279163953Srrs return (NULL); 1280163953Srrs } 1281163953Srrs if ((asoc->state & SCTP_STATE_COOKIE_WAIT) || 1282163953Srrs (asoc->state & SCTP_STATE_COOKIE_ECHOED)) { 1283163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1284163953Srrs 1285163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1286163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1287163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1288163953Srrs stcb->sctp_ep->sctp_flags |= 1289163953Srrs SCTP_PCB_FLAGS_CONNECTED; 1290163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1291163953Srrs } 1292166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) 1293166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1294166675Srrs else 1295166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1296166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 1297166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1298166675Srrs } else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 1299166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_restartestab); 1300166675Srrs } else { 1301166675Srrs SCTP_STAT_INCR_COUNTER32(sctps_collisionestab); 1302163953Srrs } 1303163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1304166675Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1305163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1306163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1307163953Srrs 1308163953Srrs } else { 1309163953Srrs asoc->state = SCTP_STATE_OPEN; 1310163953Srrs } 1311163953Srrs sctp_stop_all_cookie_timers(stcb); 1312165220Srrs sctp_toss_old_cookies(stcb, asoc); 1313163953Srrs sctp_send_cookie_ack(stcb); 1314164205Srrs if (spec_flag) { 1315164205Srrs /* 1316164205Srrs * only if we have retrans set do we do this. What 1317164205Srrs * this call does is get only the COOKIE-ACK out and 1318164205Srrs * then when we return the normal call to 1319164205Srrs * sctp_chunk_output will get the retrans out behind 1320164205Srrs * this. 1321164205Srrs */ 1322164205Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK); 1323164205Srrs } 1324166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1325166023Srrs asoc->cookie_how[how_indx] = 11; 1326166023Srrs 1327163953Srrs return (stcb); 1328163953Srrs } 1329163953Srrs if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag && 1330163953Srrs ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) && 1331163953Srrs cookie->tie_tag_my_vtag == asoc->my_vtag_nonce && 1332163953Srrs cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce && 1333163953Srrs cookie->tie_tag_peer_vtag != 0) { 1334163953Srrs struct sctpasochead *head; 1335163953Srrs 1336163953Srrs /* 1337163953Srrs * case A in Section 5.2.4 Table 2: XXMM (peer restarted) 1338163953Srrs */ 1339165220Srrs /* temp code */ 1340166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1341166023Srrs asoc->cookie_how[how_indx] = 12; 1342165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_14); 1343165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_15); 1344165647Srrs 1345163953Srrs *sac_assoc_id = sctp_get_associd(stcb); 1346163953Srrs /* notify upper layer */ 1347163953Srrs *notification = SCTP_NOTIFY_ASSOC_RESTART; 1348165220Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 1349166675Srrs if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) && 1350166675Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 1351166675Srrs (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) { 1352166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1353166675Srrs } 1354166675Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 1355166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_restartestab); 1356166675Srrs } else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) { 1357166675Srrs SCTP_STAT_INCR_GAUGE32(sctps_collisionestab); 1358166675Srrs } 1359165647Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1360165647Srrs asoc->state = SCTP_STATE_OPEN | 1361165647Srrs SCTP_STATE_SHUTDOWN_PENDING; 1362165647Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1363165647Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1364165647Srrs 1365165647Srrs } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) { 1366165647Srrs /* move to OPEN state, if not in SHUTDOWN_SENT */ 1367165647Srrs asoc->state = SCTP_STATE_OPEN; 1368165647Srrs } 1369165647Srrs asoc->pre_open_streams = 1370165647Srrs ntohs(initack_cp->init.num_outbound_streams); 1371165647Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1372165647Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1373165647Srrs 1374165647Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1375165647Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1376165647Srrs 1377165647Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1378165647Srrs 1379165647Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1380170138Srrs if (asoc->mapping_array) { 1381165647Srrs memset(asoc->mapping_array, 0, 1382165647Srrs asoc->mapping_array_size); 1383170138Srrs } 1384165220Srrs SCTP_TCB_UNLOCK(stcb); 1385165220Srrs SCTP_INP_INFO_WLOCK(); 1386165220Srrs SCTP_INP_WLOCK(stcb->sctp_ep); 1387165220Srrs SCTP_TCB_LOCK(stcb); 1388165220Srrs atomic_add_int(&stcb->asoc.refcnt, -1); 1389163953Srrs /* send up all the data */ 1390164205Srrs SCTP_TCB_SEND_LOCK(stcb); 1391165220Srrs 1392164205Srrs sctp_report_all_outbound(stcb, 1); 1393165220Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1394165220Srrs stcb->asoc.strmout[i].stream_no = i; 1395165220Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 1396165220Srrs stcb->asoc.strmout[i].last_msg_incomplete = 0; 1397165220Srrs } 1398163953Srrs /* process the INIT-ACK info (my info) */ 1399163953Srrs asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1400163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1401163953Srrs 1402163953Srrs /* pull from vtag hash */ 1403163953Srrs LIST_REMOVE(stcb, sctp_asocs); 1404163953Srrs /* re-insert to new vtag position */ 1405163953Srrs head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 1406163953Srrs sctppcbinfo.hashasocmark)]; 1407163953Srrs /* 1408163953Srrs * put it in the bucket in the vtag hash of assoc's for the 1409163953Srrs * system 1410163953Srrs */ 1411163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_asocs); 1412163953Srrs 1413163953Srrs /* Is this the first restart? */ 1414163953Srrs if (stcb->asoc.in_restart_hash == 0) { 1415163953Srrs /* Ok add it to assoc_id vtag hash */ 1416163953Srrs head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 1417163953Srrs sctppcbinfo.hashrestartmark)]; 1418163953Srrs LIST_INSERT_HEAD(head, stcb, sctp_tcbrestarhash); 1419163953Srrs stcb->asoc.in_restart_hash = 1; 1420163953Srrs } 1421163953Srrs /* process the INIT info (peer's info) */ 1422164205Srrs SCTP_TCB_SEND_UNLOCK(stcb); 1423165220Srrs SCTP_INP_WUNLOCK(stcb->sctp_ep); 1424165220Srrs SCTP_INP_INFO_WUNLOCK(); 1425165220Srrs 1426163953Srrs retval = sctp_process_init(init_cp, stcb, net); 1427163953Srrs if (retval < 0) { 1428166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1429166023Srrs asoc->cookie_how[how_indx] = 13; 1430166023Srrs 1431163953Srrs return (NULL); 1432163953Srrs } 1433163953Srrs /* 1434163953Srrs * since we did not send a HB make sure we don't double 1435163953Srrs * things 1436163953Srrs */ 1437163953Srrs net->hb_responded = 1; 1438163953Srrs 1439163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1440163953Srrs init_offset + sizeof(struct sctp_init_chunk), 1441163953Srrs initack_offset, sh, init_src)) { 1442166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1443166023Srrs asoc->cookie_how[how_indx] = 14; 1444166023Srrs 1445163953Srrs return (NULL); 1446163953Srrs } 1447163953Srrs /* respond with a COOKIE-ACK */ 1448163953Srrs sctp_stop_all_cookie_timers(stcb); 1449165220Srrs sctp_toss_old_cookies(stcb, asoc); 1450163953Srrs sctp_send_cookie_ack(stcb); 1451166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1452166023Srrs asoc->cookie_how[how_indx] = 15; 1453163953Srrs 1454163953Srrs return (stcb); 1455163953Srrs } 1456166023Srrs if (how_indx < sizeof(asoc->cookie_how)) 1457166023Srrs asoc->cookie_how[how_indx] = 16; 1458163953Srrs /* all other cases... */ 1459163953Srrs return (NULL); 1460163953Srrs} 1461163953Srrs 1462166086Srrs 1463163953Srrs/* 1464163953Srrs * handle a state cookie for a new association m: input packet mbuf chain-- 1465163953Srrs * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf 1466163953Srrs * and the cookie signature does not exist offset: offset into mbuf to the 1467163953Srrs * cookie-echo chunk length: length of the cookie chunk to: where the init 1468163953Srrs * was from returns a new TCB 1469163953Srrs */ 1470163953Srrsstatic struct sctp_tcb * 1471163953Srrssctp_process_cookie_new(struct mbuf *m, int iphlen, int offset, 1472163953Srrs struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, 1473163953Srrs struct sctp_inpcb *inp, struct sctp_nets **netp, 1474163953Srrs struct sockaddr *init_src, int *notification, 1475169352Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len, 1476169352Srrs uint32_t vrf_id, uint32_t table_id) 1477163953Srrs{ 1478163953Srrs struct sctp_tcb *stcb; 1479163953Srrs struct sctp_init_chunk *init_cp, init_buf; 1480163953Srrs struct sctp_init_ack_chunk *initack_cp, initack_buf; 1481163953Srrs struct sockaddr_storage sa_store; 1482163953Srrs struct sockaddr *initack_src = (struct sockaddr *)&sa_store; 1483163953Srrs struct sockaddr_in *sin; 1484163953Srrs struct sockaddr_in6 *sin6; 1485163953Srrs struct sctp_association *asoc; 1486163953Srrs int chk_length; 1487163953Srrs int init_offset, initack_offset, initack_limit; 1488163953Srrs int retval; 1489163953Srrs int error = 0; 1490163953Srrs uint32_t old_tag; 1491166675Srrs uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE]; 1492163953Srrs 1493163953Srrs /* 1494163953Srrs * find and validate the INIT chunk in the cookie (peer's info) the 1495163953Srrs * INIT should start after the cookie-echo header struct (chunk 1496163953Srrs * header, state cookie header struct) 1497163953Srrs */ 1498163953Srrs init_offset = offset + sizeof(struct sctp_cookie_echo_chunk); 1499163953Srrs init_cp = (struct sctp_init_chunk *) 1500163953Srrs sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk), 1501163953Srrs (uint8_t *) & init_buf); 1502163953Srrs if (init_cp == NULL) { 1503163953Srrs /* could not pull a INIT chunk in cookie */ 1504169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 1505169420Srrs "process_cookie_new: could not pull INIT chunk hdr\n"); 1506163953Srrs return (NULL); 1507163953Srrs } 1508163953Srrs chk_length = ntohs(init_cp->ch.chunk_length); 1509163953Srrs if (init_cp->ch.chunk_type != SCTP_INITIATION) { 1510169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n"); 1511163953Srrs return (NULL); 1512163953Srrs } 1513163953Srrs initack_offset = init_offset + SCTP_SIZE32(chk_length); 1514163953Srrs /* 1515163953Srrs * find and validate the INIT-ACK chunk in the cookie (my info) the 1516163953Srrs * INIT-ACK follows the INIT chunk 1517163953Srrs */ 1518163953Srrs initack_cp = (struct sctp_init_ack_chunk *) 1519163953Srrs sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk), 1520163953Srrs (uint8_t *) & initack_buf); 1521163953Srrs if (initack_cp == NULL) { 1522163953Srrs /* could not pull INIT-ACK chunk in cookie */ 1523169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n"); 1524163953Srrs return (NULL); 1525163953Srrs } 1526163953Srrs chk_length = ntohs(initack_cp->ch.chunk_length); 1527163953Srrs if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) { 1528163953Srrs return (NULL); 1529163953Srrs } 1530163953Srrs /* 1531163953Srrs * NOTE: We can't use the INIT_ACK's chk_length to determine the 1532163953Srrs * "initack_limit" value. This is because the chk_length field 1533163953Srrs * includes the length of the cookie, but the cookie is omitted when 1534163953Srrs * the INIT and INIT_ACK are tacked onto the cookie... 1535163953Srrs */ 1536163953Srrs initack_limit = offset + cookie_len; 1537163953Srrs 1538163953Srrs /* 1539163953Srrs * now that we know the INIT/INIT-ACK are in place, create a new TCB 1540163953Srrs * and popluate 1541163953Srrs */ 1542163953Srrs stcb = sctp_aloc_assoc(inp, init_src, 0, &error, 1543168299Srrs ntohl(initack_cp->init.initiate_tag), vrf_id); 1544163953Srrs if (stcb == NULL) { 1545163953Srrs struct mbuf *op_err; 1546163953Srrs 1547163953Srrs /* memory problem? */ 1548169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 1549169420Srrs "process_cookie_new: no room for another TCB!\n"); 1550163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1551163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1552169352Srrs sh, op_err, vrf_id, table_id); 1553163953Srrs return (NULL); 1554163953Srrs } 1555163953Srrs /* get the correct sctp_nets */ 1556169420Srrs if (netp) 1557169420Srrs *netp = sctp_findnet(stcb, init_src); 1558169420Srrs 1559163953Srrs asoc = &stcb->asoc; 1560169352Srrs /* save the table id (vrf_id is done in aloc_assoc) */ 1561169352Srrs asoc->table_id = table_id; 1562163953Srrs /* get scope variables out of cookie */ 1563163953Srrs asoc->ipv4_local_scope = cookie->ipv4_scope; 1564163953Srrs asoc->site_scope = cookie->site_scope; 1565163953Srrs asoc->local_scope = cookie->local_scope; 1566163953Srrs asoc->loopback_scope = cookie->loopback_scope; 1567163953Srrs 1568163953Srrs if ((asoc->ipv4_addr_legal != cookie->ipv4_addr_legal) || 1569163953Srrs (asoc->ipv6_addr_legal != cookie->ipv6_addr_legal)) { 1570163953Srrs struct mbuf *op_err; 1571163953Srrs 1572163953Srrs /* 1573163953Srrs * Houston we have a problem. The EP changed while the 1574163953Srrs * cookie was in flight. Only recourse is to abort the 1575163953Srrs * association. 1576163953Srrs */ 1577163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 1578163953Srrs sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen, 1579169352Srrs sh, op_err, vrf_id, table_id); 1580163953Srrs return (NULL); 1581163953Srrs } 1582163953Srrs /* process the INIT-ACK info (my info) */ 1583163953Srrs old_tag = asoc->my_vtag; 1584163953Srrs asoc->assoc_id = asoc->my_vtag = ntohl(initack_cp->init.initiate_tag); 1585163953Srrs asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd); 1586163953Srrs asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams); 1587163953Srrs asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn); 1588163953Srrs asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number; 1589163953Srrs asoc->last_cwr_tsn = asoc->init_seq_number - 1; 1590163953Srrs asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1; 1591163953Srrs asoc->str_reset_seq_in = asoc->init_seq_number; 1592163953Srrs 1593163953Srrs asoc->advanced_peer_ack_point = asoc->last_acked_seq; 1594163953Srrs 1595163953Srrs /* process the INIT info (peer's info) */ 1596169420Srrs if (netp) 1597169420Srrs retval = sctp_process_init(init_cp, stcb, *netp); 1598169420Srrs else 1599169420Srrs retval = 0; 1600163953Srrs if (retval < 0) { 1601165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16); 1602163953Srrs return (NULL); 1603163953Srrs } 1604163953Srrs /* load all addresses */ 1605163953Srrs if (sctp_load_addresses_from_init(stcb, m, iphlen, 1606163953Srrs init_offset + sizeof(struct sctp_init_chunk), initack_offset, sh, 1607163953Srrs init_src)) { 1608165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_17); 1609163953Srrs return (NULL); 1610163953Srrs } 1611163953Srrs /* 1612163953Srrs * verify any preceding AUTH chunk that was skipped 1613163953Srrs */ 1614163953Srrs /* pull the local authentication parameters from the cookie/init-ack */ 1615163953Srrs sctp_auth_get_cookie_params(stcb, m, 1616163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1617163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk))); 1618163953Srrs if (auth_skipped) { 1619163953Srrs struct sctp_auth_chunk *auth; 1620163953Srrs 1621163953Srrs auth = (struct sctp_auth_chunk *) 1622166675Srrs sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf); 1623169420Srrs if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) { 1624163953Srrs /* auth HMAC failed, dump the assoc and packet */ 1625169420Srrs SCTPDBG(SCTP_DEBUG_AUTH1, 1626169420Srrs "COOKIE-ECHO: AUTH failed\n"); 1627165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_18); 1628163953Srrs return (NULL); 1629163953Srrs } else { 1630163953Srrs /* remaining chunks checked... good to go */ 1631163953Srrs stcb->asoc.authenticated = 1; 1632163953Srrs } 1633163953Srrs } 1634163953Srrs /* update current state */ 1635169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n"); 1636163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 1637163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 1638163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1639163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 1640163953Srrs } else { 1641163953Srrs asoc->state = SCTP_STATE_OPEN; 1642163953Srrs } 1643165220Srrs sctp_stop_all_cookie_timers(stcb); 1644163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_passiveestab); 1645163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 1646163953Srrs 1647163953Srrs /* 1648163953Srrs * if we're doing ASCONFs, check to see if we have any new local 1649163953Srrs * addresses that need to get added to the peer (eg. addresses 1650163953Srrs * changed while cookie echo in flight). This needs to be done 1651163953Srrs * after we go to the OPEN state to do the correct asconf 1652163953Srrs * processing. else, make sure we have the correct addresses in our 1653163953Srrs * lists 1654163953Srrs */ 1655163953Srrs 1656163953Srrs /* warning, we re-use sin, sin6, sa_store here! */ 1657163953Srrs /* pull in local_address (our "from" address) */ 1658163953Srrs if (cookie->laddr_type == SCTP_IPV4_ADDRESS) { 1659163953Srrs /* source addr is IPv4 */ 1660163953Srrs sin = (struct sockaddr_in *)initack_src; 1661163953Srrs memset(sin, 0, sizeof(*sin)); 1662163953Srrs sin->sin_family = AF_INET; 1663163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 1664163953Srrs sin->sin_addr.s_addr = cookie->laddress[0]; 1665163953Srrs } else if (cookie->laddr_type == SCTP_IPV6_ADDRESS) { 1666163953Srrs /* source addr is IPv6 */ 1667163953Srrs sin6 = (struct sockaddr_in6 *)initack_src; 1668163953Srrs memset(sin6, 0, sizeof(*sin6)); 1669163953Srrs sin6->sin6_family = AF_INET6; 1670163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1671163953Srrs sin6->sin6_scope_id = cookie->scope_id; 1672163953Srrs memcpy(&sin6->sin6_addr, cookie->laddress, 1673163953Srrs sizeof(sin6->sin6_addr)); 1674163953Srrs } else { 1675165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_19); 1676163953Srrs return (NULL); 1677163953Srrs } 1678163953Srrs 1679163953Srrs sctp_check_address_list(stcb, m, 1680163953Srrs initack_offset + sizeof(struct sctp_init_ack_chunk), 1681163953Srrs initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)), 1682163953Srrs initack_src, cookie->local_scope, cookie->site_scope, 1683163953Srrs cookie->ipv4_scope, cookie->loopback_scope); 1684163953Srrs 1685163953Srrs 1686163953Srrs /* set up to notify upper layer */ 1687163953Srrs *notification = SCTP_NOTIFY_ASSOC_UP; 1688163953Srrs if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1689163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && 1690163953Srrs (inp->sctp_socket->so_qlimit == 0)) { 1691163953Srrs /* 1692163953Srrs * This is an endpoint that called connect() how it got a 1693163953Srrs * cookie that is NEW is a bit of a mystery. It must be that 1694163953Srrs * the INIT was sent, but before it got there.. a complete 1695163953Srrs * INIT/INIT-ACK/COOKIE arrived. But of course then it 1696163953Srrs * should have went to the other code.. not here.. oh well.. 1697163953Srrs * a bit of protection is worth having.. 1698163953Srrs */ 1699163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1700163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 1701163953Srrs } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 1702163953Srrs (inp->sctp_socket->so_qlimit)) { 1703163953Srrs /* 1704163953Srrs * We don't want to do anything with this one. Since it is 1705163953Srrs * the listening guy. The timer will get started for 1706163953Srrs * accepted connections in the caller. 1707163953Srrs */ 1708163953Srrs ; 1709163953Srrs } 1710163953Srrs /* since we did not send a HB make sure we don't double things */ 1711169420Srrs if ((netp) && (*netp)) 1712169420Srrs (*netp)->hb_responded = 1; 1713163953Srrs 1714163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1715163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1716163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL); 1717163953Srrs } 1718163953Srrs /* respond with a COOKIE-ACK */ 1719165220Srrs /* calculate the RTT */ 1720169420Srrs if ((netp) && (*netp)) 1721169420Srrs (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp, 1722169420Srrs &cookie->time_entered); 1723163953Srrs sctp_send_cookie_ack(stcb); 1724163953Srrs return (stcb); 1725163953Srrs} 1726163953Srrs 1727163953Srrs 1728163953Srrs/* 1729163953Srrs * handles a COOKIE-ECHO message stcb: modified to either a new or left as 1730163953Srrs * existing (non-NULL) TCB 1731163953Srrs */ 1732163953Srrsstatic struct mbuf * 1733163953Srrssctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset, 1734163953Srrs struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp, 1735163953Srrs struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp, 1736169352Srrs int auth_skipped, uint32_t auth_offset, uint32_t auth_len, 1737169352Srrs struct sctp_tcb **locked_tcb, uint32_t vrf_id, uint32_t table_id) 1738163953Srrs{ 1739163953Srrs struct sctp_state_cookie *cookie; 1740163953Srrs struct sockaddr_in6 sin6; 1741163953Srrs struct sockaddr_in sin; 1742163953Srrs struct sctp_tcb *l_stcb = *stcb; 1743163953Srrs struct sctp_inpcb *l_inp; 1744163953Srrs struct sockaddr *to; 1745163953Srrs sctp_assoc_t sac_restart_id; 1746163953Srrs struct sctp_pcb *ep; 1747163953Srrs struct mbuf *m_sig; 1748163953Srrs uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE]; 1749163953Srrs uint8_t *sig; 1750163953Srrs uint8_t cookie_ok = 0; 1751163953Srrs unsigned int size_of_pkt, sig_offset, cookie_offset; 1752163953Srrs unsigned int cookie_len; 1753163953Srrs struct timeval now; 1754163953Srrs struct timeval time_expires; 1755163953Srrs struct sockaddr_storage dest_store; 1756163953Srrs struct sockaddr *localep_sa = (struct sockaddr *)&dest_store; 1757163953Srrs struct ip *iph; 1758163953Srrs int notification = 0; 1759163953Srrs struct sctp_nets *netl; 1760163953Srrs int had_a_existing_tcb = 0; 1761163953Srrs 1762169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 1763169420Srrs "sctp_handle_cookie: handling COOKIE-ECHO\n"); 1764163953Srrs 1765163953Srrs if (inp_p == NULL) { 1766163953Srrs return (NULL); 1767163953Srrs } 1768163953Srrs /* First get the destination address setup too. */ 1769163953Srrs iph = mtod(m, struct ip *); 1770163953Srrs if (iph->ip_v == IPVERSION) { 1771163953Srrs /* its IPv4 */ 1772163953Srrs struct sockaddr_in *sin; 1773163953Srrs 1774163953Srrs sin = (struct sockaddr_in *)(localep_sa); 1775163953Srrs memset(sin, 0, sizeof(*sin)); 1776163953Srrs sin->sin_family = AF_INET; 1777163953Srrs sin->sin_len = sizeof(*sin); 1778163953Srrs sin->sin_port = sh->dest_port; 1779163953Srrs sin->sin_addr.s_addr = iph->ip_dst.s_addr; 1780165647Srrs size_of_pkt = SCTP_GET_IPV4_LENGTH(iph); 1781163953Srrs } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1782163953Srrs /* its IPv6 */ 1783163953Srrs struct ip6_hdr *ip6; 1784163953Srrs struct sockaddr_in6 *sin6; 1785163953Srrs 1786163953Srrs sin6 = (struct sockaddr_in6 *)(localep_sa); 1787163953Srrs memset(sin6, 0, sizeof(*sin6)); 1788163953Srrs sin6->sin6_family = AF_INET6; 1789163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 1790163953Srrs ip6 = mtod(m, struct ip6_hdr *); 1791163953Srrs sin6->sin6_port = sh->dest_port; 1792163953Srrs sin6->sin6_addr = ip6->ip6_dst; 1793166675Srrs size_of_pkt = SCTP_GET_IPV6_LENGTH(ip6) + iphlen; 1794163953Srrs } else { 1795163953Srrs return (NULL); 1796163953Srrs } 1797163953Srrs 1798163953Srrs cookie = &cp->cookie; 1799163953Srrs cookie_offset = offset + sizeof(struct sctp_chunkhdr); 1800163953Srrs cookie_len = ntohs(cp->ch.chunk_length); 1801163953Srrs 1802163953Srrs if ((cookie->peerport != sh->src_port) && 1803163953Srrs (cookie->myport != sh->dest_port) && 1804163953Srrs (cookie->my_vtag != sh->v_tag)) { 1805163953Srrs /* 1806163953Srrs * invalid ports or bad tag. Note that we always leave the 1807163953Srrs * v_tag in the header in network order and when we stored 1808163953Srrs * it in the my_vtag slot we also left it in network order. 1809169352Srrs * This maintains the match even though it may be in the 1810163953Srrs * opposite byte order of the machine :-> 1811163953Srrs */ 1812163953Srrs return (NULL); 1813163953Srrs } 1814163953Srrs if (cookie_len > size_of_pkt || 1815163953Srrs cookie_len < sizeof(struct sctp_cookie_echo_chunk) + 1816163953Srrs sizeof(struct sctp_init_chunk) + 1817163953Srrs sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) { 1818163953Srrs /* cookie too long! or too small */ 1819163953Srrs return (NULL); 1820163953Srrs } 1821163953Srrs /* 1822163953Srrs * split off the signature into its own mbuf (since it should not be 1823163953Srrs * calculated in the sctp_hmac_m() call). 1824163953Srrs */ 1825163953Srrs sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE; 1826163953Srrs if (sig_offset > size_of_pkt) { 1827163953Srrs /* packet not correct size! */ 1828163953Srrs /* XXX this may already be accounted for earlier... */ 1829163953Srrs return (NULL); 1830163953Srrs } 1831163953Srrs m_sig = m_split(m, sig_offset, M_DONTWAIT); 1832163953Srrs if (m_sig == NULL) { 1833163953Srrs /* out of memory or ?? */ 1834163953Srrs return (NULL); 1835163953Srrs } 1836163953Srrs /* 1837163953Srrs * compute the signature/digest for the cookie 1838163953Srrs */ 1839163953Srrs ep = &(*inp_p)->sctp_ep; 1840163953Srrs l_inp = *inp_p; 1841163953Srrs if (l_stcb) { 1842163953Srrs SCTP_TCB_UNLOCK(l_stcb); 1843163953Srrs } 1844163953Srrs SCTP_INP_RLOCK(l_inp); 1845163953Srrs if (l_stcb) { 1846163953Srrs SCTP_TCB_LOCK(l_stcb); 1847163953Srrs } 1848163953Srrs /* which cookie is it? */ 1849163953Srrs if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) && 1850163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1851163953Srrs /* it's the old cookie */ 1852169378Srrs (void)sctp_hmac_m(SCTP_HMAC, 1853163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1854163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1855163953Srrs } else { 1856163953Srrs /* it's the current cookie */ 1857169378Srrs (void)sctp_hmac_m(SCTP_HMAC, 1858163953Srrs (uint8_t *) ep->secret_key[(int)ep->current_secret_number], 1859163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1860163953Srrs } 1861163953Srrs /* get the signature */ 1862163953Srrs SCTP_INP_RUNLOCK(l_inp); 1863163953Srrs sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig); 1864163953Srrs if (sig == NULL) { 1865163953Srrs /* couldn't find signature */ 1866164085Srrs sctp_m_freem(m_sig); 1867163953Srrs return (NULL); 1868163953Srrs } 1869163953Srrs /* compare the received digest with the computed digest */ 1870163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) { 1871163953Srrs /* try the old cookie? */ 1872163953Srrs if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) && 1873163953Srrs (ep->current_secret_number != ep->last_secret_number)) { 1874163953Srrs /* compute digest with old */ 1875169378Srrs (void)sctp_hmac_m(SCTP_HMAC, 1876163953Srrs (uint8_t *) ep->secret_key[(int)ep->last_secret_number], 1877163953Srrs SCTP_SECRET_SIZE, m, cookie_offset, calc_sig); 1878163953Srrs /* compare */ 1879163953Srrs if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0) 1880163953Srrs cookie_ok = 1; 1881163953Srrs } 1882163953Srrs } else { 1883163953Srrs cookie_ok = 1; 1884163953Srrs } 1885163953Srrs 1886163953Srrs /* 1887163953Srrs * Now before we continue we must reconstruct our mbuf so that 1888163953Srrs * normal processing of any other chunks will work. 1889163953Srrs */ 1890163953Srrs { 1891163953Srrs struct mbuf *m_at; 1892163953Srrs 1893163953Srrs m_at = m; 1894165647Srrs while (SCTP_BUF_NEXT(m_at) != NULL) { 1895165647Srrs m_at = SCTP_BUF_NEXT(m_at); 1896163953Srrs } 1897165647Srrs SCTP_BUF_NEXT(m_at) = m_sig; 1898163953Srrs } 1899163953Srrs 1900163953Srrs if (cookie_ok == 0) { 1901169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n"); 1902169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 1903169420Srrs "offset = %u, cookie_offset = %u, sig_offset = %u\n", 1904169420Srrs (uint32_t) offset, cookie_offset, sig_offset); 1905163953Srrs return (NULL); 1906163953Srrs } 1907163953Srrs /* 1908163953Srrs * check the cookie timestamps to be sure it's not stale 1909163953Srrs */ 1910169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 1911163953Srrs /* Expire time is in Ticks, so we convert to seconds */ 1912169655Srrs time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life); 1913163953Srrs time_expires.tv_usec = cookie->time_entered.tv_usec; 1914163953Srrs if (timevalcmp(&now, &time_expires, >)) { 1915163953Srrs /* cookie is stale! */ 1916163953Srrs struct mbuf *op_err; 1917163953Srrs struct sctp_stale_cookie_msg *scm; 1918163953Srrs uint32_t tim; 1919163953Srrs 1920163953Srrs op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_stale_cookie_msg), 1921165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 1922163953Srrs if (op_err == NULL) { 1923163953Srrs /* FOOBAR */ 1924163953Srrs return (NULL); 1925163953Srrs } 1926163953Srrs /* pre-reserve some space */ 1927165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 1928165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 1929165647Srrs SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 1930163953Srrs 1931163953Srrs /* Set the len */ 1932165647Srrs SCTP_BUF_LEN(op_err) = sizeof(struct sctp_stale_cookie_msg); 1933163953Srrs scm = mtod(op_err, struct sctp_stale_cookie_msg *); 1934163953Srrs scm->ph.param_type = htons(SCTP_CAUSE_STALE_COOKIE); 1935163953Srrs scm->ph.param_length = htons((sizeof(struct sctp_paramhdr) + 1936163953Srrs (sizeof(uint32_t)))); 1937163953Srrs /* seconds to usec */ 1938163953Srrs tim = (now.tv_sec - time_expires.tv_sec) * 1000000; 1939163953Srrs /* add in usec */ 1940163953Srrs if (tim == 0) 1941163953Srrs tim = now.tv_usec - cookie->time_entered.tv_usec; 1942163953Srrs scm->time_usec = htonl(tim); 1943169352Srrs sctp_send_operr_to(m, iphlen, op_err, cookie->peers_vtag, 1944169352Srrs vrf_id, table_id); 1945163953Srrs return (NULL); 1946163953Srrs } 1947163953Srrs /* 1948163953Srrs * Now we must see with the lookup address if we have an existing 1949163953Srrs * asoc. This will only happen if we were in the COOKIE-WAIT state 1950163953Srrs * and a INIT collided with us and somewhere the peer sent the 1951163953Srrs * cookie on another address besides the single address our assoc 1952163953Srrs * had for him. In this case we will have one of the tie-tags set at 1953163953Srrs * least AND the address field in the cookie can be used to look it 1954163953Srrs * up. 1955163953Srrs */ 1956163953Srrs to = NULL; 1957163953Srrs if (cookie->addr_type == SCTP_IPV6_ADDRESS) { 1958163953Srrs memset(&sin6, 0, sizeof(sin6)); 1959163953Srrs sin6.sin6_family = AF_INET6; 1960163953Srrs sin6.sin6_len = sizeof(sin6); 1961163953Srrs sin6.sin6_port = sh->src_port; 1962163953Srrs sin6.sin6_scope_id = cookie->scope_id; 1963163953Srrs memcpy(&sin6.sin6_addr.s6_addr, cookie->address, 1964163953Srrs sizeof(sin6.sin6_addr.s6_addr)); 1965163953Srrs to = (struct sockaddr *)&sin6; 1966163953Srrs } else if (cookie->addr_type == SCTP_IPV4_ADDRESS) { 1967163953Srrs memset(&sin, 0, sizeof(sin)); 1968163953Srrs sin.sin_family = AF_INET; 1969163953Srrs sin.sin_len = sizeof(sin); 1970163953Srrs sin.sin_port = sh->src_port; 1971163953Srrs sin.sin_addr.s_addr = cookie->address[0]; 1972163953Srrs to = (struct sockaddr *)&sin; 1973169420Srrs } else { 1974169420Srrs /* This should not happen */ 1975169420Srrs return (NULL); 1976163953Srrs } 1977163953Srrs if ((*stcb == NULL) && to) { 1978163953Srrs /* Yep, lets check */ 1979163953Srrs *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, localep_sa, NULL); 1980163953Srrs if (*stcb == NULL) { 1981163953Srrs /* 1982163953Srrs * We should have only got back the same inp. If we 1983163953Srrs * got back a different ep we have a problem. The 1984163953Srrs * original findep got back l_inp and now 1985163953Srrs */ 1986163953Srrs if (l_inp != *inp_p) { 1987169420Srrs SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n"); 1988163953Srrs } 1989165220Srrs } else { 1990165220Srrs if (*locked_tcb == NULL) { 1991165220Srrs /* 1992165220Srrs * In this case we found the assoc only 1993165220Srrs * after we locked the create lock. This 1994165220Srrs * means we are in a colliding case and we 1995165220Srrs * must make sure that we unlock the tcb if 1996165220Srrs * its one of the cases where we throw away 1997165220Srrs * the incoming packets. 1998165220Srrs */ 1999165220Srrs *locked_tcb = *stcb; 2000165220Srrs 2001165220Srrs /* 2002165220Srrs * We must also increment the inp ref count 2003165220Srrs * since the ref_count flags was set when we 2004165220Srrs * did not find the TCB, now we found it 2005165220Srrs * which reduces the refcount.. we must 2006165220Srrs * raise it back out to balance it all :-) 2007165220Srrs */ 2008165220Srrs SCTP_INP_INCR_REF((*stcb)->sctp_ep); 2009165220Srrs if ((*stcb)->sctp_ep != l_inp) { 2010169420Srrs SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n", 2011165220Srrs (*stcb)->sctp_ep, l_inp); 2012165220Srrs } 2013165220Srrs } 2014163953Srrs } 2015163953Srrs } 2016169420Srrs if (to == NULL) 2017169420Srrs return (NULL); 2018169420Srrs 2019163953Srrs cookie_len -= SCTP_SIGNATURE_SIZE; 2020163953Srrs if (*stcb == NULL) { 2021163953Srrs /* this is the "normal" case... get a new TCB */ 2022163953Srrs *stcb = sctp_process_cookie_new(m, iphlen, offset, sh, cookie, 2023163953Srrs cookie_len, *inp_p, netp, to, ¬ification, 2024169352Srrs auth_skipped, auth_offset, auth_len, vrf_id, table_id); 2025163953Srrs } else { 2026163953Srrs /* this is abnormal... cookie-echo on existing TCB */ 2027163953Srrs had_a_existing_tcb = 1; 2028163953Srrs *stcb = sctp_process_cookie_existing(m, iphlen, offset, sh, 2029163953Srrs cookie, cookie_len, *inp_p, *stcb, *netp, to, ¬ification, 2030169352Srrs &sac_restart_id, vrf_id, table_id); 2031163953Srrs } 2032163953Srrs 2033163953Srrs if (*stcb == NULL) { 2034163953Srrs /* still no TCB... must be bad cookie-echo */ 2035163953Srrs return (NULL); 2036163953Srrs } 2037163953Srrs /* 2038163953Srrs * Ok, we built an association so confirm the address we sent the 2039163953Srrs * INIT-ACK to. 2040163953Srrs */ 2041163953Srrs netl = sctp_findnet(*stcb, to); 2042163953Srrs /* 2043163953Srrs * This code should in theory NOT run but 2044163953Srrs */ 2045163953Srrs if (netl == NULL) { 2046163953Srrs /* TSNH! Huh, why do I need to add this address here? */ 2047163953Srrs int ret; 2048163953Srrs 2049165220Srrs ret = sctp_add_remote_addr(*stcb, to, SCTP_DONOT_SETSCOPE, 2050165220Srrs SCTP_IN_COOKIE_PROC); 2051163953Srrs netl = sctp_findnet(*stcb, to); 2052163953Srrs } 2053163953Srrs if (netl) { 2054163953Srrs if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) { 2055163953Srrs netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 2056169420Srrs (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL, 2057163953Srrs netl); 2058163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED, 2059163953Srrs (*stcb), 0, (void *)netl); 2060163953Srrs } 2061163953Srrs } 2062163953Srrs if (*stcb) { 2063163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, *inp_p, 2064163953Srrs *stcb, NULL); 2065163953Srrs } 2066163953Srrs if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 2067163953Srrs if (!had_a_existing_tcb || 2068163953Srrs (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 2069163953Srrs /* 2070163953Srrs * If we have a NEW cookie or the connect never 2071163953Srrs * reached the connected state during collision we 2072163953Srrs * must do the TCP accept thing. 2073163953Srrs */ 2074163953Srrs struct socket *so, *oso; 2075163953Srrs struct sctp_inpcb *inp; 2076163953Srrs 2077163953Srrs if (notification == SCTP_NOTIFY_ASSOC_RESTART) { 2078163953Srrs /* 2079163953Srrs * For a restart we will keep the same 2080163953Srrs * socket, no need to do anything. I THINK!! 2081163953Srrs */ 2082163953Srrs sctp_ulp_notify(notification, *stcb, 0, (void *)&sac_restart_id); 2083163953Srrs return (m); 2084163953Srrs } 2085163953Srrs oso = (*inp_p)->sctp_socket; 2086163953Srrs /* 2087163953Srrs * We do this to keep the sockets side happy durin 2088163953Srrs * the sonewcon ONLY. 2089163953Srrs */ 2090163953Srrs NET_LOCK_GIANT(); 2091163953Srrs SCTP_TCB_UNLOCK((*stcb)); 2092166086Srrs so = sonewconn(oso, 0 2093163953Srrs ); 2094163953Srrs NET_UNLOCK_GIANT(); 2095163953Srrs SCTP_INP_WLOCK((*stcb)->sctp_ep); 2096163953Srrs SCTP_TCB_LOCK((*stcb)); 2097163953Srrs SCTP_INP_WUNLOCK((*stcb)->sctp_ep); 2098163953Srrs if (so == NULL) { 2099163953Srrs struct mbuf *op_err; 2100163953Srrs 2101163953Srrs /* Too many sockets */ 2102169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n"); 2103163953Srrs op_err = sctp_generate_invmanparam(SCTP_CAUSE_OUT_OF_RESC); 2104163953Srrs sctp_abort_association(*inp_p, NULL, m, iphlen, 2105169352Srrs sh, op_err, vrf_id, 2106169352Srrs table_id); 2107165220Srrs sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_20); 2108163953Srrs return (NULL); 2109163953Srrs } 2110163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 2111166086Srrs SCTP_INP_INCR_REF(inp); 2112166086Srrs /* 2113166086Srrs * We add the unbound flag here so that if we get an 2114166086Srrs * soabort() before we get the move_pcb done, we 2115166086Srrs * will properly cleanup. 2116166086Srrs */ 2117163953Srrs inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2118163953Srrs SCTP_PCB_FLAGS_CONNECTED | 2119163953Srrs SCTP_PCB_FLAGS_IN_TCPPOOL | 2120166086Srrs SCTP_PCB_FLAGS_UNBOUND | 2121163953Srrs (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) | 2122163953Srrs SCTP_PCB_FLAGS_DONT_WAKE); 2123163953Srrs inp->sctp_features = (*inp_p)->sctp_features; 2124163953Srrs inp->sctp_socket = so; 2125163953Srrs inp->sctp_frag_point = (*inp_p)->sctp_frag_point; 2126163953Srrs inp->partial_delivery_point = (*inp_p)->partial_delivery_point; 2127163953Srrs inp->sctp_context = (*inp_p)->sctp_context; 2128163953Srrs inp->inp_starting_point_for_iterator = NULL; 2129163953Srrs /* 2130163953Srrs * copy in the authentication parameters from the 2131163953Srrs * original endpoint 2132163953Srrs */ 2133163953Srrs if (inp->sctp_ep.local_hmacs) 2134163953Srrs sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2135163953Srrs inp->sctp_ep.local_hmacs = 2136163953Srrs sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs); 2137163953Srrs if (inp->sctp_ep.local_auth_chunks) 2138163953Srrs sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2139163953Srrs inp->sctp_ep.local_auth_chunks = 2140163953Srrs sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks); 2141163953Srrs (void)sctp_copy_skeylist(&(*inp_p)->sctp_ep.shared_keys, 2142163953Srrs &inp->sctp_ep.shared_keys); 2143163953Srrs 2144163953Srrs /* 2145163953Srrs * Now we must move it from one hash table to 2146163953Srrs * another and get the tcb in the right place. 2147163953Srrs */ 2148163953Srrs sctp_move_pcb_and_assoc(*inp_p, inp, *stcb); 2149170056Srrs 2150170056Srrs atomic_add_int(&(*stcb)->asoc.refcnt, 1); 2151170056Srrs SCTP_TCB_UNLOCK((*stcb)); 2152170056Srrs 2153169208Srrs sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb, M_NOWAIT); 2154170056Srrs SCTP_TCB_LOCK((*stcb)); 2155170056Srrs atomic_subtract_int(&(*stcb)->asoc.refcnt, 1); 2156163953Srrs 2157170056Srrs 2158166086Srrs /* 2159166086Srrs * now we must check to see if we were aborted while 2160166086Srrs * the move was going on and the lock/unlock 2161166086Srrs * happened. 2162166086Srrs */ 2163166086Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 2164166086Srrs /* 2165166086Srrs * yep it was, we leave the assoc attached 2166166086Srrs * to the socket since the sctp_inpcb_free() 2167166086Srrs * call will send an abort for us. 2168166086Srrs */ 2169166086Srrs SCTP_INP_DECR_REF(inp); 2170166086Srrs return (NULL); 2171166086Srrs } 2172166086Srrs SCTP_INP_DECR_REF(inp); 2173163953Srrs /* Switch over to the new guy */ 2174163953Srrs *inp_p = inp; 2175166086Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2176163953Srrs 2177166086Srrs /* 2178166086Srrs * Pull it from the incomplete queue and wake the 2179166086Srrs * guy 2180166086Srrs */ 2181166086Srrs soisconnected(so); 2182163953Srrs return (m); 2183163953Srrs } 2184163953Srrs } 2185163953Srrs if ((notification) && ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) { 2186163953Srrs sctp_ulp_notify(notification, *stcb, 0, NULL); 2187163953Srrs } 2188163953Srrs return (m); 2189163953Srrs} 2190163953Srrs 2191163953Srrsstatic void 2192163953Srrssctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp, 2193163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2194163953Srrs{ 2195163953Srrs /* cp must not be used, others call this without a c-ack :-) */ 2196163953Srrs struct sctp_association *asoc; 2197163953Srrs 2198169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 2199169420Srrs "sctp_handle_cookie_ack: handling COOKIE-ACK\n"); 2200163953Srrs if (stcb == NULL) 2201163953Srrs return; 2202163953Srrs 2203163953Srrs asoc = &stcb->asoc; 2204163953Srrs 2205163953Srrs sctp_stop_all_cookie_timers(stcb); 2206163953Srrs /* process according to association state */ 2207163953Srrs if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) { 2208163953Srrs /* state change only needed when I am in right state */ 2209169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n"); 2210163953Srrs if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) { 2211163953Srrs asoc->state = SCTP_STATE_OPEN | SCTP_STATE_SHUTDOWN_PENDING; 2212163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 2213163953Srrs stcb->sctp_ep, stcb, asoc->primary_destination); 2214163953Srrs 2215163953Srrs } else { 2216163953Srrs asoc->state = SCTP_STATE_OPEN; 2217163953Srrs } 2218163953Srrs /* update RTO */ 2219163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_activeestab); 2220163953Srrs SCTP_STAT_INCR_GAUGE32(sctps_currestab); 2221163953Srrs if (asoc->overall_error_count == 0) { 2222163953Srrs net->RTO = sctp_calculate_rto(stcb, asoc, net, 2223163953Srrs &asoc->time_entered); 2224163953Srrs } 2225169378Srrs (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 2226163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL); 2227163953Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 2228163953Srrs (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 2229163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 2230163953Srrs soisconnected(stcb->sctp_ep->sctp_socket); 2231163953Srrs } 2232163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 2233163953Srrs stcb, net); 2234163953Srrs /* 2235163953Srrs * since we did not send a HB make sure we don't double 2236163953Srrs * things 2237163953Srrs */ 2238163953Srrs net->hb_responded = 1; 2239163953Srrs 2240163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 2241163953Srrs sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) { 2242163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, 2243163953Srrs stcb->sctp_ep, stcb, NULL); 2244163953Srrs } 2245163953Srrs /* 2246163953Srrs * set ASCONF timer if ASCONFs are pending and allowed (eg. 2247163953Srrs * addresses changed when init/cookie echo in flight) 2248163953Srrs */ 2249163953Srrs if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) && 2250163953Srrs (stcb->asoc.peer_supports_asconf) && 2251163953Srrs (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) { 2252163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2253163953Srrs stcb->sctp_ep, stcb, 2254163953Srrs stcb->asoc.primary_destination); 2255163953Srrs } 2256163953Srrs } 2257163953Srrs /* Toss the cookie if I can */ 2258163953Srrs sctp_toss_old_cookies(stcb, asoc); 2259163953Srrs if (!TAILQ_EMPTY(&asoc->sent_queue)) { 2260163953Srrs /* Restart the timer if we have pending data */ 2261163953Srrs struct sctp_tmit_chunk *chk; 2262163953Srrs 2263163953Srrs chk = TAILQ_FIRST(&asoc->sent_queue); 2264163953Srrs if (chk) { 2265163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2266163953Srrs stcb, chk->whoTo); 2267163953Srrs } 2268163953Srrs } 2269163953Srrs} 2270163953Srrs 2271163953Srrsstatic void 2272163953Srrssctp_handle_ecn_echo(struct sctp_ecne_chunk *cp, 2273163953Srrs struct sctp_tcb *stcb) 2274163953Srrs{ 2275163953Srrs struct sctp_nets *net; 2276163953Srrs struct sctp_tmit_chunk *lchk; 2277163953Srrs uint32_t tsn; 2278163953Srrs 2279163953Srrs if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_ecne_chunk)) { 2280163953Srrs return; 2281163953Srrs } 2282163953Srrs SCTP_STAT_INCR(sctps_recvecne); 2283163953Srrs tsn = ntohl(cp->tsn); 2284163953Srrs /* ECN Nonce stuff: need a resync and disable the nonce sum check */ 2285163953Srrs /* Also we make sure we disable the nonce_wait */ 2286163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.send_queue); 2287163953Srrs if (lchk == NULL) { 2288163953Srrs stcb->asoc.nonce_resync_tsn = stcb->asoc.sending_seq; 2289163953Srrs } else { 2290163953Srrs stcb->asoc.nonce_resync_tsn = lchk->rec.data.TSN_seq; 2291163953Srrs } 2292163953Srrs stcb->asoc.nonce_wait_for_ecne = 0; 2293163953Srrs stcb->asoc.nonce_sum_check = 0; 2294163953Srrs 2295163953Srrs /* Find where it was sent, if possible */ 2296163953Srrs net = NULL; 2297163953Srrs lchk = TAILQ_FIRST(&stcb->asoc.sent_queue); 2298163953Srrs while (lchk) { 2299163953Srrs if (lchk->rec.data.TSN_seq == tsn) { 2300163953Srrs net = lchk->whoTo; 2301163953Srrs break; 2302163953Srrs } 2303163953Srrs if (compare_with_wrap(lchk->rec.data.TSN_seq, tsn, MAX_SEQ)) 2304163953Srrs break; 2305163953Srrs lchk = TAILQ_NEXT(lchk, sctp_next); 2306163953Srrs } 2307163953Srrs if (net == NULL) 2308163953Srrs /* default is we use the primary */ 2309163953Srrs net = stcb->asoc.primary_destination; 2310163953Srrs 2311163953Srrs if (compare_with_wrap(tsn, stcb->asoc.last_cwr_tsn, MAX_TSN)) { 2312163953Srrs#ifdef SCTP_CWND_MONITOR 2313163953Srrs int old_cwnd; 2314163953Srrs 2315163953Srrs old_cwnd = net->cwnd; 2316163953Srrs#endif 2317163953Srrs SCTP_STAT_INCR(sctps_ecnereducedcwnd); 2318163953Srrs net->ssthresh = net->cwnd / 2; 2319163953Srrs if (net->ssthresh < net->mtu) { 2320163953Srrs net->ssthresh = net->mtu; 2321163953Srrs /* here back off the timer as well, to slow us down */ 2322163953Srrs net->RTO <<= 2; 2323163953Srrs } 2324163953Srrs net->cwnd = net->ssthresh; 2325163953Srrs#ifdef SCTP_CWND_MONITOR 2326163953Srrs sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_SAT); 2327163953Srrs#endif 2328163953Srrs /* 2329163953Srrs * we reduce once every RTT. So we will only lower cwnd at 2330163953Srrs * the next sending seq i.e. the resync_tsn. 2331163953Srrs */ 2332163953Srrs stcb->asoc.last_cwr_tsn = stcb->asoc.nonce_resync_tsn; 2333163953Srrs } 2334163953Srrs /* 2335163953Srrs * We always send a CWR this way if our previous one was lost our 2336163953Srrs * peer will get an update, or if it is not time again to reduce we 2337163953Srrs * still get the cwr to the peer. 2338163953Srrs */ 2339163953Srrs sctp_send_cwr(stcb, net, tsn); 2340163953Srrs} 2341163953Srrs 2342163953Srrsstatic void 2343163953Srrssctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb) 2344163953Srrs{ 2345163953Srrs /* 2346163953Srrs * Here we get a CWR from the peer. We must look in the outqueue and 2347163953Srrs * make sure that we have a covered ECNE in teh control chunk part. 2348163953Srrs * If so remove it. 2349163953Srrs */ 2350163953Srrs struct sctp_tmit_chunk *chk; 2351163953Srrs struct sctp_ecne_chunk *ecne; 2352163953Srrs 2353163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 2354163953Srrs if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) { 2355163953Srrs continue; 2356163953Srrs } 2357163953Srrs /* 2358163953Srrs * Look for and remove if it is the right TSN. Since there 2359163953Srrs * is only ONE ECNE on the control queue at any one time we 2360163953Srrs * don't need to worry about more than one! 2361163953Srrs */ 2362163953Srrs ecne = mtod(chk->data, struct sctp_ecne_chunk *); 2363163953Srrs if (compare_with_wrap(ntohl(cp->tsn), ntohl(ecne->tsn), 2364163953Srrs MAX_TSN) || (cp->tsn == ecne->tsn)) { 2365163953Srrs /* this covers this ECNE, we can remove it */ 2366163953Srrs stcb->asoc.ecn_echo_cnt_onq--; 2367163953Srrs TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, 2368163953Srrs sctp_next); 2369163953Srrs if (chk->data) { 2370163953Srrs sctp_m_freem(chk->data); 2371163953Srrs chk->data = NULL; 2372163953Srrs } 2373163953Srrs stcb->asoc.ctrl_queue_cnt--; 2374163953Srrs sctp_free_remote_addr(chk->whoTo); 2375163953Srrs sctp_free_a_chunk(stcb, chk); 2376163953Srrs break; 2377163953Srrs } 2378163953Srrs } 2379163953Srrs} 2380163953Srrs 2381163953Srrsstatic void 2382163953Srrssctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp, 2383163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 2384163953Srrs{ 2385163953Srrs struct sctp_association *asoc; 2386163953Srrs 2387169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, 2388169420Srrs "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n"); 2389163953Srrs if (stcb == NULL) 2390163953Srrs return; 2391163953Srrs 2392163953Srrs asoc = &stcb->asoc; 2393163953Srrs /* process according to association state */ 2394163953Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) { 2395163953Srrs /* unexpected SHUTDOWN-COMPLETE... so ignore... */ 2396163953Srrs SCTP_TCB_UNLOCK(stcb); 2397163953Srrs return; 2398163953Srrs } 2399163953Srrs /* notify upper layer protocol */ 2400163953Srrs if (stcb->sctp_socket) { 2401163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL); 2402163953Srrs /* are the queues empty? they should be */ 2403163953Srrs if (!TAILQ_EMPTY(&asoc->send_queue) || 2404163953Srrs !TAILQ_EMPTY(&asoc->sent_queue) || 2405163953Srrs !TAILQ_EMPTY(&asoc->out_wheel)) { 2406164205Srrs sctp_report_all_outbound(stcb, 0); 2407163953Srrs } 2408163953Srrs } 2409163953Srrs /* stop the timer */ 2410165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_21); 2411163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_shutdown); 2412163953Srrs /* free the TCB */ 2413165220Srrs sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_22); 2414163953Srrs return; 2415163953Srrs} 2416163953Srrs 2417163953Srrsstatic int 2418163953Srrsprocess_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc, 2419163953Srrs struct sctp_nets *net, uint8_t flg) 2420163953Srrs{ 2421163953Srrs switch (desc->chunk_type) { 2422163953Srrs case SCTP_DATA: 2423163953Srrs /* find the tsn to resend (possibly */ 2424163953Srrs { 2425163953Srrs uint32_t tsn; 2426163953Srrs struct sctp_tmit_chunk *tp1; 2427163953Srrs 2428163953Srrs tsn = ntohl(desc->tsn_ifany); 2429163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2430163953Srrs while (tp1) { 2431163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2432163953Srrs /* found it */ 2433163953Srrs break; 2434163953Srrs } 2435163953Srrs if (compare_with_wrap(tp1->rec.data.TSN_seq, tsn, 2436163953Srrs MAX_TSN)) { 2437163953Srrs /* not found */ 2438163953Srrs tp1 = NULL; 2439163953Srrs break; 2440163953Srrs } 2441163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2442163953Srrs } 2443163953Srrs if (tp1 == NULL) { 2444163953Srrs /* 2445163953Srrs * Do it the other way , aka without paying 2446163953Srrs * attention to queue seq order. 2447163953Srrs */ 2448163953Srrs SCTP_STAT_INCR(sctps_pdrpdnfnd); 2449163953Srrs tp1 = TAILQ_FIRST(&stcb->asoc.sent_queue); 2450163953Srrs while (tp1) { 2451163953Srrs if (tp1->rec.data.TSN_seq == tsn) { 2452163953Srrs /* found it */ 2453163953Srrs break; 2454163953Srrs } 2455163953Srrs tp1 = TAILQ_NEXT(tp1, sctp_next); 2456163953Srrs } 2457163953Srrs } 2458163953Srrs if (tp1 == NULL) { 2459163953Srrs SCTP_STAT_INCR(sctps_pdrptsnnf); 2460163953Srrs } 2461163953Srrs if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) { 2462163953Srrs uint8_t *ddp; 2463163953Srrs 2464163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 2465163953Srrs ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) { 2466163953Srrs SCTP_STAT_INCR(sctps_pdrpdiwnp); 2467163953Srrs return (0); 2468163953Srrs } 2469163953Srrs if (stcb->asoc.peers_rwnd == 0 && 2470163953Srrs (flg & SCTP_FROM_MIDDLE_BOX)) { 2471163953Srrs SCTP_STAT_INCR(sctps_pdrpdizrw); 2472163953Srrs return (0); 2473163953Srrs } 2474163953Srrs ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+ 2475163953Srrs sizeof(struct sctp_data_chunk)); 2476163953Srrs { 2477163953Srrs unsigned int iii; 2478163953Srrs 2479163953Srrs for (iii = 0; iii < sizeof(desc->data_bytes); 2480163953Srrs iii++) { 2481163953Srrs if (ddp[iii] != desc->data_bytes[iii]) { 2482163953Srrs SCTP_STAT_INCR(sctps_pdrpbadd); 2483163953Srrs return (-1); 2484163953Srrs } 2485163953Srrs } 2486163953Srrs } 2487163953Srrs /* 2488163953Srrs * We zero out the nonce so resync not 2489163953Srrs * needed 2490163953Srrs */ 2491163953Srrs tp1->rec.data.ect_nonce = 0; 2492163953Srrs 2493163953Srrs if (tp1->do_rtt) { 2494163953Srrs /* 2495163953Srrs * this guy had a RTO calculation 2496163953Srrs * pending on it, cancel it 2497163953Srrs */ 2498163953Srrs tp1->do_rtt = 0; 2499163953Srrs } 2500163953Srrs SCTP_STAT_INCR(sctps_pdrpmark); 2501163953Srrs if (tp1->sent != SCTP_DATAGRAM_RESEND) 2502163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2503163953Srrs tp1->sent = SCTP_DATAGRAM_RESEND; 2504163953Srrs /* 2505163953Srrs * mark it as if we were doing a FR, since 2506163953Srrs * we will be getting gap ack reports behind 2507163953Srrs * the info from the router. 2508163953Srrs */ 2509163953Srrs tp1->rec.data.doing_fast_retransmit = 1; 2510163953Srrs /* 2511163953Srrs * mark the tsn with what sequences can 2512163953Srrs * cause a new FR. 2513163953Srrs */ 2514163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 2515163953Srrs tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 2516163953Srrs } else { 2517163953Srrs tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 2518163953Srrs } 2519163953Srrs 2520163953Srrs /* restart the timer */ 2521163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2522165220Srrs stcb, tp1->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_23); 2523163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 2524163953Srrs stcb, tp1->whoTo); 2525163953Srrs 2526163953Srrs /* fix counts and things */ 2527165220Srrs#ifdef SCTP_FLIGHT_LOGGING 2528168709Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP, 2529165220Srrs tp1->whoTo->flight_size, 2530165220Srrs tp1->book_size, 2531165220Srrs (uintptr_t) stcb, 2532165220Srrs tp1->rec.data.TSN_seq); 2533165220Srrs#endif 2534168709Srrs sctp_flight_size_decrease(tp1); 2535168709Srrs sctp_total_flight_decrease(stcb, tp1); 2536163953Srrs } { 2537163953Srrs /* audit code */ 2538163953Srrs unsigned int audit; 2539163953Srrs 2540163953Srrs audit = 0; 2541163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) { 2542163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2543163953Srrs audit++; 2544163953Srrs } 2545163953Srrs TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue, 2546163953Srrs sctp_next) { 2547163953Srrs if (tp1->sent == SCTP_DATAGRAM_RESEND) 2548163953Srrs audit++; 2549163953Srrs } 2550163953Srrs if (audit != stcb->asoc.sent_queue_retran_cnt) { 2551169420Srrs SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n", 2552163953Srrs audit, stcb->asoc.sent_queue_retran_cnt); 2553163953Srrs#ifndef SCTP_AUDITING_ENABLED 2554163953Srrs stcb->asoc.sent_queue_retran_cnt = audit; 2555163953Srrs#endif 2556163953Srrs } 2557163953Srrs } 2558163953Srrs } 2559163953Srrs break; 2560163953Srrs case SCTP_ASCONF: 2561163953Srrs { 2562163953Srrs struct sctp_tmit_chunk *asconf; 2563163953Srrs 2564163953Srrs TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue, 2565163953Srrs sctp_next) { 2566163953Srrs if (asconf->rec.chunk_id.id == SCTP_ASCONF) { 2567163953Srrs break; 2568163953Srrs } 2569163953Srrs } 2570163953Srrs if (asconf) { 2571163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 2572163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2573163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 2574163953Srrs asconf->snd_count--; 2575163953Srrs } 2576163953Srrs } 2577163953Srrs break; 2578163953Srrs case SCTP_INITIATION: 2579163953Srrs /* resend the INIT */ 2580163953Srrs stcb->asoc.dropped_special_cnt++; 2581163953Srrs if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) { 2582163953Srrs /* 2583163953Srrs * If we can get it in, in a few attempts we do 2584163953Srrs * this, otherwise we let the timer fire. 2585163953Srrs */ 2586163953Srrs sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, 2587165220Srrs stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_24); 2588163953Srrs sctp_send_initiate(stcb->sctp_ep, stcb); 2589163953Srrs } 2590163953Srrs break; 2591163953Srrs case SCTP_SELECTIVE_ACK: 2592163953Srrs /* resend the sack */ 2593163953Srrs sctp_send_sack(stcb); 2594163953Srrs break; 2595163953Srrs case SCTP_HEARTBEAT_REQUEST: 2596163953Srrs /* resend a demand HB */ 2597169378Srrs (void)sctp_send_hb(stcb, 1, net); 2598163953Srrs break; 2599163953Srrs case SCTP_SHUTDOWN: 2600163953Srrs sctp_send_shutdown(stcb, net); 2601163953Srrs break; 2602163953Srrs case SCTP_SHUTDOWN_ACK: 2603163953Srrs sctp_send_shutdown_ack(stcb, net); 2604163953Srrs break; 2605163953Srrs case SCTP_COOKIE_ECHO: 2606163953Srrs { 2607163953Srrs struct sctp_tmit_chunk *cookie; 2608163953Srrs 2609163953Srrs cookie = NULL; 2610163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, 2611163953Srrs sctp_next) { 2612163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 2613163953Srrs break; 2614163953Srrs } 2615163953Srrs } 2616163953Srrs if (cookie) { 2617163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) 2618163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 2619163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 2620163953Srrs sctp_stop_all_cookie_timers(stcb); 2621163953Srrs } 2622163953Srrs } 2623163953Srrs break; 2624163953Srrs case SCTP_COOKIE_ACK: 2625163953Srrs sctp_send_cookie_ack(stcb); 2626163953Srrs break; 2627163953Srrs case SCTP_ASCONF_ACK: 2628163953Srrs /* resend last asconf ack */ 2629163953Srrs sctp_send_asconf_ack(stcb, 1); 2630163953Srrs break; 2631163953Srrs case SCTP_FORWARD_CUM_TSN: 2632163953Srrs send_forward_tsn(stcb, &stcb->asoc); 2633163953Srrs break; 2634163953Srrs /* can't do anything with these */ 2635163953Srrs case SCTP_PACKET_DROPPED: 2636163953Srrs case SCTP_INITIATION_ACK: /* this should not happen */ 2637163953Srrs case SCTP_HEARTBEAT_ACK: 2638163953Srrs case SCTP_ABORT_ASSOCIATION: 2639163953Srrs case SCTP_OPERATION_ERROR: 2640163953Srrs case SCTP_SHUTDOWN_COMPLETE: 2641163953Srrs case SCTP_ECN_ECHO: 2642163953Srrs case SCTP_ECN_CWR: 2643163953Srrs default: 2644163953Srrs break; 2645163953Srrs } 2646163953Srrs return (0); 2647163953Srrs} 2648163953Srrs 2649163953Srrsvoid 2650163953Srrssctp_reset_in_stream(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2651163953Srrs{ 2652163953Srrs int i; 2653163953Srrs uint16_t temp; 2654163953Srrs 2655163953Srrs /* 2656163953Srrs * We set things to 0xffff since this is the last delivered sequence 2657163953Srrs * and we will be sending in 0 after the reset. 2658163953Srrs */ 2659163953Srrs 2660163953Srrs if (number_entries) { 2661163953Srrs for (i = 0; i < number_entries; i++) { 2662163953Srrs temp = ntohs(list[i]); 2663163953Srrs if (temp >= stcb->asoc.streamincnt) { 2664163953Srrs continue; 2665163953Srrs } 2666163953Srrs stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff; 2667163953Srrs } 2668163953Srrs } else { 2669163953Srrs list = NULL; 2670163953Srrs for (i = 0; i < stcb->asoc.streamincnt; i++) { 2671163953Srrs stcb->asoc.strmin[i].last_sequence_delivered = 0xffff; 2672163953Srrs } 2673163953Srrs } 2674163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list); 2675163953Srrs} 2676163953Srrs 2677163953Srrsstatic void 2678163953Srrssctp_reset_out_streams(struct sctp_tcb *stcb, int number_entries, uint16_t * list) 2679163953Srrs{ 2680163953Srrs int i; 2681163953Srrs 2682163953Srrs if (number_entries == 0) { 2683163953Srrs for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 2684163953Srrs stcb->asoc.strmout[i].next_sequence_sent = 0; 2685163953Srrs } 2686163953Srrs } else if (number_entries) { 2687163953Srrs for (i = 0; i < number_entries; i++) { 2688163953Srrs uint16_t temp; 2689163953Srrs 2690163953Srrs temp = ntohs(list[i]); 2691163953Srrs if (temp >= stcb->asoc.streamoutcnt) { 2692163953Srrs /* no such stream */ 2693163953Srrs continue; 2694163953Srrs } 2695163953Srrs stcb->asoc.strmout[temp].next_sequence_sent = 0; 2696163953Srrs } 2697163953Srrs } 2698163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list); 2699163953Srrs} 2700163953Srrs 2701163953Srrs 2702163953Srrsstruct sctp_stream_reset_out_request * 2703163953Srrssctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk) 2704163953Srrs{ 2705163953Srrs struct sctp_association *asoc; 2706163953Srrs struct sctp_stream_reset_out_req *req; 2707163953Srrs struct sctp_stream_reset_out_request *r; 2708163953Srrs struct sctp_tmit_chunk *chk; 2709163953Srrs int len, clen; 2710163953Srrs 2711163953Srrs asoc = &stcb->asoc; 2712163953Srrs if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 2713169208Srrs asoc->stream_reset_outstanding = 0; 2714163953Srrs return (NULL); 2715163953Srrs } 2716163953Srrs if (stcb->asoc.str_reset == NULL) { 2717169208Srrs asoc->stream_reset_outstanding = 0; 2718163953Srrs return (NULL); 2719163953Srrs } 2720163953Srrs chk = stcb->asoc.str_reset; 2721163953Srrs if (chk->data == NULL) { 2722163953Srrs return (NULL); 2723163953Srrs } 2724163953Srrs if (bchk) { 2725163953Srrs /* he wants a copy of the chk pointer */ 2726163953Srrs *bchk = chk; 2727163953Srrs } 2728163953Srrs clen = chk->send_size; 2729163953Srrs req = mtod(chk->data, struct sctp_stream_reset_out_req *); 2730163953Srrs r = &req->sr_req; 2731163953Srrs if (ntohl(r->request_seq) == seq) { 2732163953Srrs /* found it */ 2733163953Srrs return (r); 2734163953Srrs } 2735163953Srrs len = SCTP_SIZE32(ntohs(r->ph.param_length)); 2736163953Srrs if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) { 2737163953Srrs /* move to the next one, there can only be a max of two */ 2738163953Srrs r = (struct sctp_stream_reset_out_request *)((caddr_t)r + len); 2739163953Srrs if (ntohl(r->request_seq) == seq) { 2740163953Srrs return (r); 2741163953Srrs } 2742163953Srrs } 2743163953Srrs /* that seq is not here */ 2744163953Srrs return (NULL); 2745163953Srrs} 2746163953Srrs 2747163953Srrsstatic void 2748163953Srrssctp_clean_up_stream_reset(struct sctp_tcb *stcb) 2749163953Srrs{ 2750163953Srrs struct sctp_association *asoc; 2751163953Srrs struct sctp_tmit_chunk *chk = stcb->asoc.str_reset; 2752163953Srrs 2753163953Srrs if (stcb->asoc.str_reset == NULL) { 2754163953Srrs return; 2755163953Srrs } 2756166675Srrs asoc = &stcb->asoc; 2757166675Srrs 2758165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_25); 2759163953Srrs TAILQ_REMOVE(&asoc->control_send_queue, 2760163953Srrs chk, 2761163953Srrs sctp_next); 2762163953Srrs if (chk->data) { 2763163953Srrs sctp_m_freem(chk->data); 2764163953Srrs chk->data = NULL; 2765163953Srrs } 2766163953Srrs asoc->ctrl_queue_cnt--; 2767163953Srrs sctp_free_remote_addr(chk->whoTo); 2768163953Srrs 2769163953Srrs sctp_free_a_chunk(stcb, chk); 2770163953Srrs stcb->asoc.str_reset = NULL; 2771163953Srrs} 2772163953Srrs 2773163953Srrs 2774163953Srrsstatic int 2775163953Srrssctp_handle_stream_reset_response(struct sctp_tcb *stcb, 2776163953Srrs uint32_t seq, uint32_t action, 2777164139Srrs struct sctp_stream_reset_response *respin) 2778163953Srrs{ 2779163953Srrs uint16_t type; 2780163953Srrs int lparm_len; 2781163953Srrs struct sctp_association *asoc = &stcb->asoc; 2782163953Srrs struct sctp_tmit_chunk *chk; 2783163953Srrs struct sctp_stream_reset_out_request *srparam; 2784163953Srrs int number_entries; 2785163953Srrs 2786163953Srrs if (asoc->stream_reset_outstanding == 0) { 2787163953Srrs /* duplicate */ 2788163953Srrs return (0); 2789163953Srrs } 2790163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 2791163953Srrs srparam = sctp_find_stream_reset(stcb, seq, &chk); 2792163953Srrs if (srparam) { 2793163953Srrs stcb->asoc.str_reset_seq_out++; 2794163953Srrs type = ntohs(srparam->ph.param_type); 2795163953Srrs lparm_len = ntohs(srparam->ph.param_length); 2796163953Srrs if (type == SCTP_STR_RESET_OUT_REQUEST) { 2797164139Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t); 2798163953Srrs asoc->stream_reset_out_is_outstanding = 0; 2799163953Srrs if (asoc->stream_reset_outstanding) 2800163953Srrs asoc->stream_reset_outstanding--; 2801163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2802163953Srrs /* do it */ 2803163953Srrs sctp_reset_out_streams(stcb, number_entries, srparam->list_of_streams); 2804163953Srrs } else { 2805163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, srparam->list_of_streams); 2806163953Srrs } 2807163953Srrs } else if (type == SCTP_STR_RESET_IN_REQUEST) { 2808163953Srrs /* Answered my request */ 2809164139Srrs number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t); 2810163953Srrs if (asoc->stream_reset_outstanding) 2811163953Srrs asoc->stream_reset_outstanding--; 2812163953Srrs if (action != SCTP_STREAM_RESET_PERFORMED) { 2813163953Srrs sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb, number_entries, srparam->list_of_streams); 2814163953Srrs } 2815163953Srrs } else if (type == SCTP_STR_RESET_TSN_REQUEST) { 2816163953Srrs /** 2817163953Srrs * a) Adopt the new in tsn. 2818163953Srrs * b) reset the map 2819163953Srrs * c) Adopt the new out-tsn 2820163953Srrs */ 2821163953Srrs struct sctp_stream_reset_response_tsn *resp; 2822163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2823163953Srrs int abort_flag = 0; 2824163953Srrs 2825163953Srrs if (respin == NULL) { 2826163953Srrs /* huh ? */ 2827163953Srrs return (0); 2828163953Srrs } 2829163953Srrs if (action == SCTP_STREAM_RESET_PERFORMED) { 2830163953Srrs resp = (struct sctp_stream_reset_response_tsn *)respin; 2831163953Srrs asoc->stream_reset_outstanding--; 2832163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 2833163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 2834163953Srrs fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1); 2835163953Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag); 2836163953Srrs if (abort_flag) { 2837163953Srrs return (1); 2838163953Srrs } 2839163953Srrs stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1); 2840163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 2841163953Srrs stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn); 2842163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 2843163953Srrs stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn); 2844163953Srrs stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn; 2845163953Srrs 2846163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 2847163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 2848163953Srrs 2849163953Srrs } 2850163953Srrs } 2851163953Srrs /* get rid of the request and get the request flags */ 2852163953Srrs if (asoc->stream_reset_outstanding == 0) { 2853163953Srrs sctp_clean_up_stream_reset(stcb); 2854163953Srrs } 2855163953Srrs } 2856163953Srrs } 2857163953Srrs return (0); 2858163953Srrs} 2859163953Srrs 2860163953Srrsstatic void 2861163953Srrssctp_handle_str_reset_request_in(struct sctp_tcb *stcb, 2862163953Srrs struct sctp_tmit_chunk *chk, 2863163953Srrs struct sctp_stream_reset_in_request *req) 2864163953Srrs{ 2865163953Srrs uint32_t seq; 2866163953Srrs int len, i; 2867163953Srrs int number_entries; 2868163953Srrs uint16_t temp; 2869163953Srrs 2870163953Srrs /* 2871163953Srrs * peer wants me to send a str-reset to him for my outgoing seq's if 2872163953Srrs * seq_in is right. 2873163953Srrs */ 2874163953Srrs struct sctp_association *asoc = &stcb->asoc; 2875163953Srrs 2876163953Srrs seq = ntohl(req->request_seq); 2877163953Srrs if (asoc->str_reset_seq_in == seq) { 2878163953Srrs if (stcb->asoc.stream_reset_out_is_outstanding == 0) { 2879163953Srrs len = ntohs(req->ph.param_length); 2880163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t)); 2881163953Srrs for (i = 0; i < number_entries; i++) { 2882163953Srrs temp = ntohs(req->list_of_streams[i]); 2883163953Srrs req->list_of_streams[i] = temp; 2884163953Srrs } 2885163953Srrs /* move the reset action back one */ 2886163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2887163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2888163953Srrs sctp_add_stream_reset_out(chk, number_entries, req->list_of_streams, 2889163953Srrs asoc->str_reset_seq_out, 2890163953Srrs seq, (asoc->sending_seq - 1)); 2891163953Srrs asoc->stream_reset_out_is_outstanding = 1; 2892163953Srrs asoc->str_reset = chk; 2893163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 2894163953Srrs stcb->asoc.stream_reset_outstanding++; 2895163953Srrs } else { 2896163953Srrs /* Can't do it, since we have sent one out */ 2897163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 2898163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_TRY_LATER; 2899163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2900163953Srrs } 2901163953Srrs asoc->str_reset_seq_in++; 2902163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 2903163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 2904163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 2905163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 2906163953Srrs } else { 2907163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2908163953Srrs } 2909163953Srrs} 2910163953Srrs 2911163953Srrsstatic int 2912163953Srrssctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb, 2913163953Srrs struct sctp_tmit_chunk *chk, 2914163953Srrs struct sctp_stream_reset_tsn_request *req) 2915163953Srrs{ 2916163953Srrs /* reset all in and out and update the tsn */ 2917163953Srrs /* 2918163953Srrs * A) reset my str-seq's on in and out. B) Select a receive next, 2919163953Srrs * and set cum-ack to it. Also process this selected number as a 2920163953Srrs * fwd-tsn as well. C) set in the response my next sending seq. 2921163953Srrs */ 2922163953Srrs struct sctp_forward_tsn_chunk fwdtsn; 2923163953Srrs struct sctp_association *asoc = &stcb->asoc; 2924163953Srrs int abort_flag = 0; 2925163953Srrs uint32_t seq; 2926163953Srrs 2927163953Srrs seq = ntohl(req->request_seq); 2928163953Srrs if (asoc->str_reset_seq_in == seq) { 2929163953Srrs fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk)); 2930163953Srrs fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN; 2931163953Srrs fwdtsn.ch.chunk_flags = 0; 2932163953Srrs fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1); 2933163953Srrs sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag); 2934163953Srrs if (abort_flag) { 2935163953Srrs return (1); 2936163953Srrs } 2937163953Srrs stcb->asoc.highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA; 2938163953Srrs stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map; 2939163953Srrs stcb->asoc.mapping_array_base_tsn = stcb->asoc.highest_tsn_inside_map + 1; 2940163953Srrs memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size); 2941163953Srrs atomic_add_int(&stcb->asoc.sending_seq, 1); 2942163953Srrs /* save off historical data for retrans */ 2943163953Srrs stcb->asoc.last_sending_seq[1] = stcb->asoc.last_sending_seq[0]; 2944163953Srrs stcb->asoc.last_sending_seq[0] = stcb->asoc.sending_seq; 2945163953Srrs stcb->asoc.last_base_tsnsent[1] = stcb->asoc.last_base_tsnsent[0]; 2946163953Srrs stcb->asoc.last_base_tsnsent[0] = stcb->asoc.mapping_array_base_tsn; 2947163953Srrs 2948163953Srrs sctp_add_stream_reset_result_tsn(chk, 2949163953Srrs ntohl(req->request_seq), 2950163953Srrs SCTP_STREAM_RESET_PERFORMED, 2951163953Srrs stcb->asoc.sending_seq, 2952163953Srrs stcb->asoc.mapping_array_base_tsn); 2953163953Srrs sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL); 2954163953Srrs sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL); 2955163953Srrs stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0]; 2956163953Srrs stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 2957163953Srrs 2958163953Srrs asoc->str_reset_seq_in++; 2959163953Srrs } else if (asoc->str_reset_seq_in - 1 == seq) { 2960163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0], 2961163953Srrs stcb->asoc.last_sending_seq[0], 2962163953Srrs stcb->asoc.last_base_tsnsent[0] 2963163953Srrs ); 2964163953Srrs } else if (asoc->str_reset_seq_in - 2 == seq) { 2965163953Srrs sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1], 2966163953Srrs stcb->asoc.last_sending_seq[1], 2967163953Srrs stcb->asoc.last_base_tsnsent[1] 2968163953Srrs ); 2969163953Srrs } else { 2970163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 2971163953Srrs } 2972163953Srrs return (0); 2973163953Srrs} 2974163953Srrs 2975163953Srrsstatic void 2976163953Srrssctp_handle_str_reset_request_out(struct sctp_tcb *stcb, 2977163953Srrs struct sctp_tmit_chunk *chk, 2978163953Srrs struct sctp_stream_reset_out_request *req) 2979163953Srrs{ 2980163953Srrs uint32_t seq, tsn; 2981163953Srrs int number_entries, len; 2982163953Srrs struct sctp_association *asoc = &stcb->asoc; 2983163953Srrs 2984163953Srrs seq = ntohl(req->request_seq); 2985163953Srrs 2986163953Srrs /* now if its not a duplicate we process it */ 2987163953Srrs if (asoc->str_reset_seq_in == seq) { 2988163953Srrs len = ntohs(req->ph.param_length); 2989163953Srrs number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t)); 2990163953Srrs /* 2991163953Srrs * the sender is resetting, handle the list issue.. we must 2992163953Srrs * a) verify if we can do the reset, if so no problem b) If 2993163953Srrs * we can't do the reset we must copy the request. c) queue 2994163953Srrs * it, and setup the data in processor to trigger it off 2995163953Srrs * when needed and dequeue all the queued data. 2996163953Srrs */ 2997163953Srrs tsn = ntohl(req->send_reset_at_tsn); 2998163953Srrs 2999163953Srrs /* move the reset action back one */ 3000163953Srrs asoc->last_reset_action[1] = asoc->last_reset_action[0]; 3001163953Srrs if ((tsn == asoc->cumulative_tsn) || 3002163953Srrs (compare_with_wrap(asoc->cumulative_tsn, tsn, MAX_TSN))) { 3003163953Srrs /* we can do it now */ 3004163953Srrs sctp_reset_in_stream(stcb, number_entries, req->list_of_streams); 3005163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 3006163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3007163953Srrs } else { 3008163953Srrs /* 3009163953Srrs * we must queue it up and thus wait for the TSN's 3010163953Srrs * to arrive that are at or before tsn 3011163953Srrs */ 3012163953Srrs struct sctp_stream_reset_list *liste; 3013163953Srrs int siz; 3014163953Srrs 3015163953Srrs siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t)); 3016163953Srrs SCTP_MALLOC(liste, struct sctp_stream_reset_list *, 3017170091Srrs siz, SCTP_M_STRESET); 3018163953Srrs if (liste == NULL) { 3019163953Srrs /* gak out of memory */ 3020163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_DENIED); 3021163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_DENIED; 3022163953Srrs return; 3023163953Srrs } 3024163953Srrs liste->tsn = tsn; 3025163953Srrs liste->number_entries = number_entries; 3026163953Srrs memcpy(&liste->req, req, 3027163953Srrs (sizeof(struct sctp_stream_reset_out_request) + (number_entries * sizeof(uint16_t)))); 3028163953Srrs TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp); 3029163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_PERFORMED); 3030163953Srrs asoc->last_reset_action[0] = SCTP_STREAM_RESET_PERFORMED; 3031163953Srrs } 3032163953Srrs asoc->str_reset_seq_in++; 3033163953Srrs } else if ((asoc->str_reset_seq_in - 1) == seq) { 3034163953Srrs /* 3035163953Srrs * one seq back, just echo back last action since my 3036163953Srrs * response was lost. 3037163953Srrs */ 3038163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]); 3039163953Srrs } else if ((asoc->str_reset_seq_in - 2) == seq) { 3040163953Srrs /* 3041163953Srrs * two seq back, just echo back last action since my 3042163953Srrs * response was lost. 3043163953Srrs */ 3044163953Srrs sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]); 3045163953Srrs } else { 3046163953Srrs sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_BAD_SEQNO); 3047163953Srrs } 3048163953Srrs} 3049163953Srrs 3050163953Srrsstatic int 3051163953Srrssctp_handle_stream_reset(struct sctp_tcb *stcb, struct sctp_stream_reset_out_req *sr_req) 3052163953Srrs{ 3053163953Srrs int chk_length, param_len, ptype; 3054163953Srrs uint32_t seq; 3055163953Srrs int num_req = 0; 3056163953Srrs struct sctp_tmit_chunk *chk; 3057163953Srrs struct sctp_chunkhdr *ch; 3058163953Srrs struct sctp_paramhdr *ph; 3059166675Srrs int ret_code = 0; 3060166675Srrs int num_param = 0; 3061163953Srrs 3062163953Srrs /* now it may be a reset or a reset-response */ 3063163953Srrs chk_length = ntohs(sr_req->ch.chunk_length); 3064163953Srrs 3065163953Srrs /* setup for adding the response */ 3066163953Srrs sctp_alloc_a_chunk(stcb, chk); 3067163953Srrs if (chk == NULL) { 3068163953Srrs return (ret_code); 3069163953Srrs } 3070163953Srrs chk->rec.chunk_id.id = SCTP_STREAM_RESET; 3071169208Srrs chk->rec.chunk_id.can_take_data = 0; 3072163953Srrs chk->asoc = &stcb->asoc; 3073163953Srrs chk->no_fr_allowed = 0; 3074163953Srrs chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr); 3075166023Srrs chk->book_size_scale = 0; 3076165647Srrs chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 3077163953Srrs if (chk->data == NULL) { 3078163953Srrsstrres_nochunk: 3079163953Srrs if (chk->data) { 3080163953Srrs sctp_m_freem(chk->data); 3081163953Srrs chk->data = NULL; 3082163953Srrs } 3083163953Srrs sctp_free_a_chunk(stcb, chk); 3084163953Srrs return (ret_code); 3085163953Srrs } 3086165647Srrs SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 3087163953Srrs 3088163953Srrs /* setup chunk parameters */ 3089163953Srrs chk->sent = SCTP_DATAGRAM_UNSENT; 3090163953Srrs chk->snd_count = 0; 3091163953Srrs chk->whoTo = stcb->asoc.primary_destination; 3092163953Srrs atomic_add_int(&chk->whoTo->ref_count, 1); 3093163953Srrs 3094163953Srrs ch = mtod(chk->data, struct sctp_chunkhdr *); 3095163953Srrs ch->chunk_type = SCTP_STREAM_RESET; 3096163953Srrs ch->chunk_flags = 0; 3097163953Srrs ch->chunk_length = htons(chk->send_size); 3098165647Srrs SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 3099163953Srrs ph = (struct sctp_paramhdr *)&sr_req->sr_req; 3100163953Srrs while ((size_t)chk_length >= sizeof(struct sctp_stream_reset_tsn_request)) { 3101163953Srrs param_len = ntohs(ph->param_length); 3102163953Srrs if (param_len < (int)sizeof(struct sctp_stream_reset_tsn_request)) { 3103163953Srrs /* bad param */ 3104163953Srrs break; 3105163953Srrs } 3106163953Srrs ptype = ntohs(ph->param_type); 3107163953Srrs num_param++; 3108163953Srrs if (num_param > SCTP_MAX_RESET_PARAMS) { 3109163953Srrs /* hit the max of parameters already sorry.. */ 3110163953Srrs break; 3111163953Srrs } 3112163953Srrs if (ptype == SCTP_STR_RESET_OUT_REQUEST) { 3113163953Srrs struct sctp_stream_reset_out_request *req_out; 3114163953Srrs 3115163953Srrs req_out = (struct sctp_stream_reset_out_request *)ph; 3116163953Srrs num_req++; 3117163953Srrs if (stcb->asoc.stream_reset_outstanding) { 3118163953Srrs seq = ntohl(req_out->response_seq); 3119163953Srrs if (seq == stcb->asoc.str_reset_seq_out) { 3120163953Srrs /* implicit ack */ 3121169420Srrs (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_PERFORMED, NULL); 3122163953Srrs } 3123163953Srrs } 3124163953Srrs sctp_handle_str_reset_request_out(stcb, chk, req_out); 3125163953Srrs } else if (ptype == SCTP_STR_RESET_IN_REQUEST) { 3126163953Srrs struct sctp_stream_reset_in_request *req_in; 3127163953Srrs 3128163953Srrs num_req++; 3129163953Srrs req_in = (struct sctp_stream_reset_in_request *)ph; 3130163953Srrs sctp_handle_str_reset_request_in(stcb, chk, req_in); 3131163953Srrs } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) { 3132163953Srrs struct sctp_stream_reset_tsn_request *req_tsn; 3133163953Srrs 3134163953Srrs num_req++; 3135163953Srrs req_tsn = (struct sctp_stream_reset_tsn_request *)ph; 3136163953Srrs if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) { 3137163953Srrs ret_code = 1; 3138163953Srrs goto strres_nochunk; 3139163953Srrs } 3140163953Srrs /* no more */ 3141163953Srrs break; 3142163953Srrs } else if (ptype == SCTP_STR_RESET_RESPONSE) { 3143163953Srrs struct sctp_stream_reset_response *resp; 3144163953Srrs uint32_t result; 3145163953Srrs 3146163953Srrs resp = (struct sctp_stream_reset_response *)ph; 3147163953Srrs seq = ntohl(resp->response_seq); 3148163953Srrs result = ntohl(resp->result); 3149163953Srrs if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) { 3150163953Srrs ret_code = 1; 3151163953Srrs goto strres_nochunk; 3152163953Srrs } 3153163953Srrs } else { 3154163953Srrs break; 3155163953Srrs } 3156163953Srrs 3157163953Srrs ph = (struct sctp_paramhdr *)((caddr_t)ph + SCTP_SIZE32(param_len)); 3158163953Srrs chk_length -= SCTP_SIZE32(param_len); 3159163953Srrs } 3160163953Srrs if (num_req == 0) { 3161163953Srrs /* we have no response free the stuff */ 3162163953Srrs goto strres_nochunk; 3163163953Srrs } 3164163953Srrs /* ok we have a chunk to link in */ 3165163953Srrs TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, 3166163953Srrs chk, 3167163953Srrs sctp_next); 3168163953Srrs stcb->asoc.ctrl_queue_cnt++; 3169163953Srrs return (ret_code); 3170163953Srrs} 3171163953Srrs 3172163953Srrs/* 3173163953Srrs * Handle a router or endpoints report of a packet loss, there are two ways 3174163953Srrs * to handle this, either we get the whole packet and must disect it 3175163953Srrs * ourselves (possibly with truncation and or corruption) or it is a summary 3176163953Srrs * from a middle box that did the disectting for us. 3177163953Srrs */ 3178163953Srrsstatic void 3179163953Srrssctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp, 3180163953Srrs struct sctp_tcb *stcb, struct sctp_nets *net) 3181163953Srrs{ 3182163953Srrs uint32_t bottle_bw, on_queue; 3183163953Srrs uint16_t trunc_len; 3184163953Srrs unsigned int chlen; 3185163953Srrs unsigned int at; 3186163953Srrs struct sctp_chunk_desc desc; 3187163953Srrs struct sctp_chunkhdr *ch; 3188163953Srrs 3189163953Srrs chlen = ntohs(cp->ch.chunk_length); 3190163953Srrs chlen -= sizeof(struct sctp_pktdrop_chunk); 3191163953Srrs /* XXX possible chlen underflow */ 3192163953Srrs if (chlen == 0) { 3193163953Srrs ch = NULL; 3194163953Srrs if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) 3195163953Srrs SCTP_STAT_INCR(sctps_pdrpbwrpt); 3196163953Srrs } else { 3197163953Srrs ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr)); 3198163953Srrs chlen -= sizeof(struct sctphdr); 3199163953Srrs /* XXX possible chlen underflow */ 3200163953Srrs memset(&desc, 0, sizeof(desc)); 3201163953Srrs } 3202163953Srrs trunc_len = (uint16_t) ntohs(cp->trunc_len); 3203163953Srrs /* now the chunks themselves */ 3204163953Srrs while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) { 3205163953Srrs desc.chunk_type = ch->chunk_type; 3206163953Srrs /* get amount we need to move */ 3207163953Srrs at = ntohs(ch->chunk_length); 3208163953Srrs if (at < sizeof(struct sctp_chunkhdr)) { 3209163953Srrs /* corrupt chunk, maybe at the end? */ 3210163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3211163953Srrs break; 3212163953Srrs } 3213163953Srrs if (trunc_len == 0) { 3214163953Srrs /* we are supposed to have all of it */ 3215163953Srrs if (at > chlen) { 3216163953Srrs /* corrupt skip it */ 3217163953Srrs SCTP_STAT_INCR(sctps_pdrpcrupt); 3218163953Srrs break; 3219163953Srrs } 3220163953Srrs } else { 3221163953Srrs /* is there enough of it left ? */ 3222163953Srrs if (desc.chunk_type == SCTP_DATA) { 3223163953Srrs if (chlen < (sizeof(struct sctp_data_chunk) + 3224163953Srrs sizeof(desc.data_bytes))) { 3225163953Srrs break; 3226163953Srrs } 3227163953Srrs } else { 3228163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3229163953Srrs break; 3230163953Srrs } 3231163953Srrs } 3232163953Srrs } 3233163953Srrs if (desc.chunk_type == SCTP_DATA) { 3234163953Srrs /* can we get out the tsn? */ 3235163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3236163953Srrs SCTP_STAT_INCR(sctps_pdrpmbda); 3237163953Srrs 3238163953Srrs if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) { 3239163953Srrs /* yep */ 3240163953Srrs struct sctp_data_chunk *dcp; 3241163953Srrs uint8_t *ddp; 3242163953Srrs unsigned int iii; 3243163953Srrs 3244163953Srrs dcp = (struct sctp_data_chunk *)ch; 3245163953Srrs ddp = (uint8_t *) (dcp + 1); 3246163953Srrs for (iii = 0; iii < sizeof(desc.data_bytes); iii++) { 3247163953Srrs desc.data_bytes[iii] = ddp[iii]; 3248163953Srrs } 3249163953Srrs desc.tsn_ifany = dcp->dp.tsn; 3250163953Srrs } else { 3251163953Srrs /* nope we are done. */ 3252163953Srrs SCTP_STAT_INCR(sctps_pdrpnedat); 3253163953Srrs break; 3254163953Srrs } 3255163953Srrs } else { 3256163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)) 3257163953Srrs SCTP_STAT_INCR(sctps_pdrpmbct); 3258163953Srrs } 3259163953Srrs 3260163953Srrs if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) { 3261163953Srrs SCTP_STAT_INCR(sctps_pdrppdbrk); 3262163953Srrs break; 3263163953Srrs } 3264163953Srrs if (SCTP_SIZE32(at) > chlen) { 3265163953Srrs break; 3266163953Srrs } 3267163953Srrs chlen -= SCTP_SIZE32(at); 3268163953Srrs if (chlen < sizeof(struct sctp_chunkhdr)) { 3269163953Srrs /* done, none left */ 3270163953Srrs break; 3271163953Srrs } 3272163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at)); 3273163953Srrs } 3274163953Srrs /* Now update any rwnd --- possibly */ 3275163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) { 3276163953Srrs /* From a peer, we get a rwnd report */ 3277163953Srrs uint32_t a_rwnd; 3278163953Srrs 3279163953Srrs SCTP_STAT_INCR(sctps_pdrpfehos); 3280163953Srrs 3281163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3282163953Srrs on_queue = ntohl(cp->current_onq); 3283163953Srrs if (bottle_bw && on_queue) { 3284163953Srrs /* a rwnd report is in here */ 3285163953Srrs if (bottle_bw > on_queue) 3286163953Srrs a_rwnd = bottle_bw - on_queue; 3287163953Srrs else 3288163953Srrs a_rwnd = 0; 3289163953Srrs 3290163953Srrs if (a_rwnd == 0) 3291163953Srrs stcb->asoc.peers_rwnd = 0; 3292163953Srrs else { 3293163953Srrs if (a_rwnd > stcb->asoc.total_flight) { 3294163953Srrs stcb->asoc.peers_rwnd = 3295163953Srrs a_rwnd - stcb->asoc.total_flight; 3296163953Srrs } else { 3297163953Srrs stcb->asoc.peers_rwnd = 0; 3298163953Srrs } 3299163953Srrs if (stcb->asoc.peers_rwnd < 3300163953Srrs stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 3301163953Srrs /* SWS sender side engages */ 3302163953Srrs stcb->asoc.peers_rwnd = 0; 3303163953Srrs } 3304163953Srrs } 3305163953Srrs } 3306163953Srrs } else { 3307163953Srrs SCTP_STAT_INCR(sctps_pdrpfmbox); 3308163953Srrs } 3309163953Srrs 3310163953Srrs /* now middle boxes in sat networks get a cwnd bump */ 3311163953Srrs if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) && 3312163953Srrs (stcb->asoc.sat_t3_loss_recovery == 0) && 3313163953Srrs (stcb->asoc.sat_network)) { 3314163953Srrs /* 3315163953Srrs * This is debateable but for sat networks it makes sense 3316163953Srrs * Note if a T3 timer has went off, we will prohibit any 3317163953Srrs * changes to cwnd until we exit the t3 loss recovery. 3318163953Srrs */ 3319163953Srrs uint32_t bw_avail; 3320163953Srrs int rtt, incr; 3321163953Srrs 3322163953Srrs#ifdef SCTP_CWND_MONITOR 3323163953Srrs int old_cwnd = net->cwnd; 3324163953Srrs 3325163953Srrs#endif 3326163953Srrs /* need real RTT for this calc */ 3327163953Srrs rtt = ((net->lastsa >> 2) + net->lastsv) >> 1; 3328163953Srrs /* get bottle neck bw */ 3329163953Srrs bottle_bw = ntohl(cp->bottle_bw); 3330163953Srrs /* and whats on queue */ 3331163953Srrs on_queue = ntohl(cp->current_onq); 3332163953Srrs /* 3333163953Srrs * adjust the on-queue if our flight is more it could be 3334163953Srrs * that the router has not yet gotten data "in-flight" to it 3335163953Srrs */ 3336163953Srrs if (on_queue < net->flight_size) 3337163953Srrs on_queue = net->flight_size; 3338163953Srrs 3339163953Srrs /* calculate the available space */ 3340163953Srrs bw_avail = (bottle_bw * rtt) / 1000; 3341163953Srrs if (bw_avail > bottle_bw) { 3342163953Srrs /* 3343163953Srrs * Cap the growth to no more than the bottle neck. 3344163953Srrs * This can happen as RTT slides up due to queues. 3345163953Srrs * It also means if you have more than a 1 second 3346163953Srrs * RTT with a empty queue you will be limited to the 3347163953Srrs * bottle_bw per second no matter if other points 3348163953Srrs * have 1/2 the RTT and you could get more out... 3349163953Srrs */ 3350163953Srrs bw_avail = bottle_bw; 3351163953Srrs } 3352163953Srrs if (on_queue > bw_avail) { 3353163953Srrs /* 3354163953Srrs * No room for anything else don't allow anything 3355163953Srrs * else to be "added to the fire". 3356163953Srrs */ 3357163953Srrs int seg_inflight, seg_onqueue, my_portion; 3358163953Srrs 3359163953Srrs net->partial_bytes_acked = 0; 3360163953Srrs 3361163953Srrs /* how much are we over queue size? */ 3362163953Srrs incr = on_queue - bw_avail; 3363163953Srrs if (stcb->asoc.seen_a_sack_this_pkt) { 3364163953Srrs /* 3365163953Srrs * undo any cwnd adjustment that the sack 3366163953Srrs * might have made 3367163953Srrs */ 3368163953Srrs net->cwnd = net->prev_cwnd; 3369163953Srrs } 3370163953Srrs /* Now how much of that is mine? */ 3371163953Srrs seg_inflight = net->flight_size / net->mtu; 3372163953Srrs seg_onqueue = on_queue / net->mtu; 3373163953Srrs my_portion = (incr * seg_inflight) / seg_onqueue; 3374163953Srrs 3375163953Srrs /* Have I made an adjustment already */ 3376163953Srrs if (net->cwnd > net->flight_size) { 3377163953Srrs /* 3378163953Srrs * for this flight I made an adjustment we 3379163953Srrs * need to decrease the portion by a share 3380163953Srrs * our previous adjustment. 3381163953Srrs */ 3382163953Srrs int diff_adj; 3383163953Srrs 3384163953Srrs diff_adj = net->cwnd - net->flight_size; 3385163953Srrs if (diff_adj > my_portion) 3386163953Srrs my_portion = 0; 3387163953Srrs else 3388163953Srrs my_portion -= diff_adj; 3389163953Srrs } 3390163953Srrs /* 3391163953Srrs * back down to the previous cwnd (assume we have 3392163953Srrs * had a sack before this packet). minus what ever 3393163953Srrs * portion of the overage is my fault. 3394163953Srrs */ 3395163953Srrs net->cwnd -= my_portion; 3396163953Srrs 3397163953Srrs /* we will NOT back down more than 1 MTU */ 3398163953Srrs if (net->cwnd <= net->mtu) { 3399163953Srrs net->cwnd = net->mtu; 3400163953Srrs } 3401163953Srrs /* force into CA */ 3402163953Srrs net->ssthresh = net->cwnd - 1; 3403163953Srrs } else { 3404163953Srrs /* 3405163953Srrs * Take 1/4 of the space left or max burst up .. 3406163953Srrs * whichever is less. 3407163953Srrs */ 3408163953Srrs incr = min((bw_avail - on_queue) >> 2, 3409163953Srrs (int)stcb->asoc.max_burst * (int)net->mtu); 3410163953Srrs net->cwnd += incr; 3411163953Srrs } 3412163953Srrs if (net->cwnd > bw_avail) { 3413163953Srrs /* We can't exceed the pipe size */ 3414163953Srrs net->cwnd = bw_avail; 3415163953Srrs } 3416163953Srrs if (net->cwnd < net->mtu) { 3417163953Srrs /* We always have 1 MTU */ 3418163953Srrs net->cwnd = net->mtu; 3419163953Srrs } 3420163953Srrs#ifdef SCTP_CWND_MONITOR 3421163953Srrs if (net->cwnd - old_cwnd != 0) { 3422163953Srrs /* log only changes */ 3423163953Srrs sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), 3424163953Srrs SCTP_CWND_LOG_FROM_SAT); 3425163953Srrs } 3426163953Srrs#endif 3427163953Srrs } 3428163953Srrs} 3429163953Srrs 3430163953Srrs/* 3431163953Srrs * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to 3432163953Srrs * still contain IP/SCTP header - stcb: is the tcb found for this packet - 3433163953Srrs * offset: offset into the mbuf chain to first chunkhdr - length: is the 3434163953Srrs * length of the complete packet outputs: - length: modified to remaining 3435163953Srrs * length after control processing - netp: modified to new sctp_nets after 3436163953Srrs * cookie-echo processing - return NULL to discard the packet (ie. no asoc, 3437163953Srrs * bad packet,...) otherwise return the tcb for this packet 3438163953Srrs */ 3439170099Srrs#ifdef __GNUC__ 3440170099Srrs__attribute__((noinline)) 3441170099Srrs#endif 3442170099Srrs static struct sctp_tcb * 3443170099Srrs sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length, 3444170099Srrs struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp, 3445170099Srrs struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen, 3446170099Srrs uint32_t vrf_id, uint32_t table_id) 3447163953Srrs{ 3448163953Srrs struct sctp_association *asoc; 3449163953Srrs uint32_t vtag_in; 3450163953Srrs int num_chunks = 0; /* number of control chunks processed */ 3451163953Srrs int chk_length; 3452163953Srrs int ret; 3453168299Srrs int abort_no_unlock = 0; 3454163953Srrs 3455163953Srrs /* 3456163953Srrs * How big should this be, and should it be alloc'd? Lets try the 3457163953Srrs * d-mtu-ceiling for now (2k) and that should hopefully work ... 3458163953Srrs * until we get into jumbo grams and such.. 3459163953Srrs */ 3460166675Srrs uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE]; 3461163953Srrs struct sctp_tcb *locked_tcb = stcb; 3462163953Srrs int got_auth = 0; 3463163953Srrs uint32_t auth_offset = 0, auth_len = 0; 3464163953Srrs int auth_skipped = 0; 3465163953Srrs 3466169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n", 3467169420Srrs iphlen, *offset, length, stcb); 3468163953Srrs 3469163953Srrs /* validate chunk header length... */ 3470163953Srrs if (ntohs(ch->chunk_length) < sizeof(*ch)) { 3471170056Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n", 3472170056Srrs ntohs(ch->chunk_length)); 3473170091Srrs if (locked_tcb) { 3474170091Srrs SCTP_TCB_UNLOCK(locked_tcb); 3475170091Srrs } 3476163953Srrs return (NULL); 3477163953Srrs } 3478163953Srrs /* 3479163953Srrs * validate the verification tag 3480163953Srrs */ 3481163953Srrs vtag_in = ntohl(sh->v_tag); 3482163953Srrs 3483165220Srrs if (locked_tcb) { 3484165220Srrs SCTP_TCB_LOCK_ASSERT(locked_tcb); 3485165220Srrs } 3486163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 3487170056Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n", 3488170056Srrs ntohs(ch->chunk_length), vtag_in); 3489163953Srrs if (vtag_in != 0) { 3490163953Srrs /* protocol error- silently discard... */ 3491163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3492169378Srrs if (locked_tcb) { 3493163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3494169378Srrs } 3495163953Srrs return (NULL); 3496163953Srrs } 3497163953Srrs } else if (ch->chunk_type != SCTP_COOKIE_ECHO) { 3498163953Srrs /* 3499163953Srrs * If there is no stcb, skip the AUTH chunk and process 3500163953Srrs * later after a stcb is found (to validate the lookup was 3501163953Srrs * valid. 3502163953Srrs */ 3503163953Srrs if ((ch->chunk_type == SCTP_AUTHENTICATION) && 3504163953Srrs (stcb == NULL) && !sctp_auth_disable) { 3505163953Srrs /* save this chunk for later processing */ 3506163953Srrs auth_skipped = 1; 3507163953Srrs auth_offset = *offset; 3508163953Srrs auth_len = ntohs(ch->chunk_length); 3509163953Srrs 3510163953Srrs /* (temporarily) move past this chunk */ 3511163953Srrs *offset += SCTP_SIZE32(auth_len); 3512163953Srrs if (*offset >= length) { 3513163953Srrs /* no more data left in the mbuf chain */ 3514163953Srrs *offset = length; 3515170091Srrs if (locked_tcb) { 3516170091Srrs SCTP_TCB_UNLOCK(locked_tcb); 3517170091Srrs } 3518163953Srrs return (NULL); 3519163953Srrs } 3520163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3521163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 3522163953Srrs } 3523169420Srrs if (ch == NULL) { 3524169420Srrs /* Help */ 3525169420Srrs *offset = length; 3526170091Srrs if (locked_tcb) { 3527170091Srrs SCTP_TCB_UNLOCK(locked_tcb); 3528170091Srrs } 3529169420Srrs return (NULL); 3530169420Srrs } 3531163953Srrs if (ch->chunk_type == SCTP_COOKIE_ECHO) { 3532163953Srrs goto process_control_chunks; 3533163953Srrs } 3534163953Srrs /* 3535163953Srrs * first check if it's an ASCONF with an unknown src addr we 3536163953Srrs * need to look inside to find the association 3537163953Srrs */ 3538163953Srrs if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) { 3539163953Srrs /* inp's refcount may be reduced */ 3540163953Srrs SCTP_INP_INCR_REF(inp); 3541163953Srrs 3542163953Srrs stcb = sctp_findassociation_ep_asconf(m, iphlen, 3543163953Srrs *offset, sh, &inp, netp); 3544163953Srrs if (stcb == NULL) { 3545163953Srrs /* 3546163953Srrs * reduce inp's refcount if not reduced in 3547163953Srrs * sctp_findassociation_ep_asconf(). 3548163953Srrs */ 3549163953Srrs SCTP_INP_DECR_REF(inp); 3550163953Srrs } 3551163953Srrs /* now go back and verify any auth chunk to be sure */ 3552163953Srrs if (auth_skipped && (stcb != NULL)) { 3553163953Srrs struct sctp_auth_chunk *auth; 3554163953Srrs 3555163953Srrs auth = (struct sctp_auth_chunk *) 3556163953Srrs sctp_m_getptr(m, auth_offset, 3557163953Srrs auth_len, chunk_buf); 3558163953Srrs got_auth = 1; 3559163953Srrs auth_skipped = 0; 3560169420Srrs if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, 3561163953Srrs auth_offset)) { 3562163953Srrs /* auth HMAC failed so dump it */ 3563163953Srrs *offset = length; 3564170091Srrs if (locked_tcb) { 3565170091Srrs SCTP_TCB_UNLOCK(locked_tcb); 3566170091Srrs } 3567163953Srrs return (NULL); 3568163953Srrs } else { 3569163953Srrs /* remaining chunks are HMAC checked */ 3570163953Srrs stcb->asoc.authenticated = 1; 3571163953Srrs } 3572163953Srrs } 3573163953Srrs } 3574163953Srrs if (stcb == NULL) { 3575163953Srrs /* no association, so it's out of the blue... */ 3576169352Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, NULL, 3577169352Srrs vrf_id, table_id); 3578163953Srrs *offset = length; 3579169378Srrs if (locked_tcb) { 3580163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3581169378Srrs } 3582163953Srrs return (NULL); 3583163953Srrs } 3584163953Srrs asoc = &stcb->asoc; 3585163953Srrs /* ABORT and SHUTDOWN can use either v_tag... */ 3586163953Srrs if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) || 3587163953Srrs (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) || 3588163953Srrs (ch->chunk_type == SCTP_PACKET_DROPPED)) { 3589163953Srrs if ((vtag_in == asoc->my_vtag) || 3590163953Srrs ((ch->chunk_flags & SCTP_HAD_NO_TCB) && 3591163953Srrs (vtag_in == asoc->peer_vtag))) { 3592163953Srrs /* this is valid */ 3593163953Srrs } else { 3594163953Srrs /* drop this packet... */ 3595163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3596169378Srrs if (locked_tcb) { 3597163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3598169378Srrs } 3599163953Srrs return (NULL); 3600163953Srrs } 3601163953Srrs } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 3602163953Srrs if (vtag_in != asoc->my_vtag) { 3603163953Srrs /* 3604163953Srrs * this could be a stale SHUTDOWN-ACK or the 3605163953Srrs * peer never got the SHUTDOWN-COMPLETE and 3606163953Srrs * is still hung; we have started a new asoc 3607163953Srrs * but it won't complete until the shutdown 3608163953Srrs * is completed 3609163953Srrs */ 3610169378Srrs if (locked_tcb) { 3611163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3612169378Srrs } 3613163953Srrs sctp_handle_ootb(m, iphlen, *offset, sh, inp, 3614169352Srrs NULL, vrf_id, table_id); 3615163953Srrs return (NULL); 3616163953Srrs } 3617163953Srrs } else { 3618163953Srrs /* for all other chunks, vtag must match */ 3619163953Srrs if (vtag_in != asoc->my_vtag) { 3620163953Srrs /* invalid vtag... */ 3621169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, 3622169420Srrs "invalid vtag: %xh, expect %xh\n", 3623169420Srrs vtag_in, asoc->my_vtag); 3624163953Srrs SCTP_STAT_INCR(sctps_badvtag); 3625169378Srrs if (locked_tcb) { 3626163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3627169378Srrs } 3628163953Srrs *offset = length; 3629163953Srrs return (NULL); 3630163953Srrs } 3631163953Srrs } 3632163953Srrs } /* end if !SCTP_COOKIE_ECHO */ 3633163953Srrs /* 3634163953Srrs * process all control chunks... 3635163953Srrs */ 3636163953Srrs if (((ch->chunk_type == SCTP_SELECTIVE_ACK) || 3637163953Srrs (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) && 3638163953Srrs (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 3639163953Srrs /* implied cookie-ack.. we must have lost the ack */ 3640163953Srrs stcb->asoc.overall_error_count = 0; 3641163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, 3642163953Srrs *netp); 3643163953Srrs } 3644163953Srrsprocess_control_chunks: 3645163953Srrs while (IS_SCTP_CONTROL(ch)) { 3646163953Srrs /* validate chunk length */ 3647163953Srrs chk_length = ntohs(ch->chunk_length); 3648169420Srrs SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n", 3649169420Srrs ch->chunk_type, chk_length); 3650163953Srrs if ((size_t)chk_length < sizeof(*ch) || 3651163953Srrs (*offset + chk_length) > length) { 3652163953Srrs *offset = length; 3653169378Srrs if (locked_tcb) { 3654163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3655169378Srrs } 3656163953Srrs return (NULL); 3657163953Srrs } 3658163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks); 3659163953Srrs /* 3660163953Srrs * INIT-ACK only gets the init ack "header" portion only 3661163953Srrs * because we don't have to process the peer's COOKIE. All 3662163953Srrs * others get a complete chunk. 3663163953Srrs */ 3664169208Srrs if ((ch->chunk_type == SCTP_INITIATION_ACK) || 3665169208Srrs (ch->chunk_type == SCTP_INITIATION)) { 3666163953Srrs /* get an init-ack chunk */ 3667163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3668163953Srrs sizeof(struct sctp_init_ack_chunk), chunk_buf); 3669163953Srrs if (ch == NULL) { 3670163953Srrs *offset = length; 3671169378Srrs if (locked_tcb) { 3672163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3673169378Srrs } 3674163953Srrs return (NULL); 3675163953Srrs } 3676169208Srrs } else if (ch->chunk_type == SCTP_COOKIE_ECHO) { 3677169208Srrs if (chk_length > sizeof(chunk_buf)) { 3678169208Srrs /* 3679169208Srrs * use just the size of the chunk buffer so 3680169208Srrs * the front part of our cookie is intact. 3681169208Srrs * The rest of cookie processing should use 3682169208Srrs * the sctp_m_getptr() function to access 3683169208Srrs * the other parts. 3684169208Srrs */ 3685169208Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3686169208Srrs (sizeof(chunk_buf) - 4), 3687169208Srrs chunk_buf); 3688169208Srrs if (ch == NULL) { 3689169208Srrs *offset = length; 3690169378Srrs if (locked_tcb) { 3691169208Srrs SCTP_TCB_UNLOCK(locked_tcb); 3692169378Srrs } 3693169208Srrs return (NULL); 3694169208Srrs } 3695169208Srrs } else { 3696169208Srrs /* We can fit it all */ 3697169208Srrs goto all_fits; 3698169208Srrs } 3699163953Srrs } else { 3700163953Srrs /* get a complete chunk... */ 3701163953Srrs if ((size_t)chk_length > sizeof(chunk_buf)) { 3702163953Srrs struct mbuf *oper; 3703163953Srrs struct sctp_paramhdr *phdr; 3704163953Srrs 3705163953Srrs oper = NULL; 3706169208Srrs if (stcb) { 3707169208Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3708169208Srrs 0, M_DONTWAIT, 1, MT_DATA); 3709169208Srrs 3710169208Srrs if (oper) { 3711169208Srrs /* pre-reserve some space */ 3712169208Srrs SCTP_BUF_RESV_UF(oper, sizeof(struct sctp_chunkhdr)); 3713169208Srrs SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr); 3714169208Srrs phdr = mtod(oper, struct sctp_paramhdr *); 3715169208Srrs phdr->param_type = htons(SCTP_CAUSE_OUT_OF_RESC); 3716169208Srrs phdr->param_length = htons(sizeof(struct sctp_paramhdr)); 3717169208Srrs sctp_queue_op_err(stcb, oper); 3718169208Srrs } 3719163953Srrs } 3720169378Srrs if (locked_tcb) { 3721163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3722169378Srrs } 3723163953Srrs return (NULL); 3724163953Srrs } 3725169208Srrs all_fits: 3726163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 3727163953Srrs chk_length, chunk_buf); 3728163953Srrs if (ch == NULL) { 3729169420Srrs SCTP_PRINTF("sctp_process_control: Can't get the all data....\n"); 3730163953Srrs *offset = length; 3731169378Srrs if (locked_tcb) { 3732163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3733169378Srrs } 3734163953Srrs return (NULL); 3735163953Srrs } 3736163953Srrs } 3737163953Srrs num_chunks++; 3738163953Srrs /* Save off the last place we got a control from */ 3739163953Srrs if (stcb != NULL) { 3740169420Srrs if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) { 3741163953Srrs /* 3742163953Srrs * allow last_control to be NULL if 3743163953Srrs * ASCONF... ASCONF processing will find the 3744163953Srrs * right net later 3745163953Srrs */ 3746169420Srrs if ((netp != NULL) && (*netp != NULL)) 3747169420Srrs stcb->asoc.last_control_chunk_from = *netp; 3748163953Srrs } 3749163953Srrs } 3750163953Srrs#ifdef SCTP_AUDITING_ENABLED 3751163953Srrs sctp_audit_log(0xB0, ch->chunk_type); 3752163953Srrs#endif 3753163953Srrs 3754163953Srrs /* check to see if this chunk required auth, but isn't */ 3755163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 3756163953Srrs sctp_auth_is_required_chunk(ch->chunk_type, 3757163953Srrs stcb->asoc.local_auth_chunks) && 3758163953Srrs !stcb->asoc.authenticated) { 3759163953Srrs /* "silently" ignore */ 3760163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 3761163953Srrs goto next_chunk; 3762163953Srrs } 3763163953Srrs switch (ch->chunk_type) { 3764163953Srrs case SCTP_INITIATION: 3765163953Srrs /* must be first and only chunk */ 3766169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n"); 3767163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3768163953Srrs /* We are not interested anymore? */ 3769163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3770163953Srrs /* 3771163953Srrs * collision case where we are 3772163953Srrs * sending to them too 3773163953Srrs */ 3774163953Srrs ; 3775163953Srrs } else { 3776169378Srrs if (locked_tcb) { 3777163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3778169378Srrs } 3779163953Srrs *offset = length; 3780163953Srrs return (NULL); 3781163953Srrs } 3782163953Srrs } 3783163953Srrs if ((num_chunks > 1) || 3784163953Srrs (sctp_strict_init && (length - *offset > SCTP_SIZE32(chk_length)))) { 3785163953Srrs *offset = length; 3786169378Srrs if (locked_tcb) { 3787163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3788169378Srrs } 3789163953Srrs return (NULL); 3790163953Srrs } 3791163953Srrs if ((stcb != NULL) && 3792163953Srrs (SCTP_GET_STATE(&stcb->asoc) == 3793163953Srrs SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3794163953Srrs sctp_send_shutdown_ack(stcb, 3795163953Srrs stcb->asoc.primary_destination); 3796163953Srrs *offset = length; 3797163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3798169378Srrs if (locked_tcb) { 3799163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3800169378Srrs } 3801163953Srrs return (NULL); 3802163953Srrs } 3803169420Srrs if (netp) { 3804169420Srrs sctp_handle_init(m, iphlen, *offset, sh, 3805169420Srrs (struct sctp_init_chunk *)ch, inp, 3806169420Srrs stcb, *netp, &abort_no_unlock, vrf_id, table_id); 3807169420Srrs } 3808168299Srrs if (abort_no_unlock) 3809168299Srrs return (NULL); 3810168299Srrs 3811163953Srrs *offset = length; 3812169378Srrs if (locked_tcb) { 3813163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3814169378Srrs } 3815163953Srrs return (NULL); 3816163953Srrs break; 3817163953Srrs case SCTP_INITIATION_ACK: 3818163953Srrs /* must be first and only chunk */ 3819169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT-ACK\n"); 3820163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3821163953Srrs /* We are not interested anymore */ 3822163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3823163953Srrs ; 3824163953Srrs } else { 3825169378Srrs if (locked_tcb) { 3826163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3827169378Srrs } 3828163953Srrs *offset = length; 3829163953Srrs if (stcb) { 3830165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_26); 3831163953Srrs } 3832163953Srrs return (NULL); 3833163953Srrs } 3834163953Srrs } 3835163953Srrs if ((num_chunks > 1) || 3836163953Srrs (sctp_strict_init && (length - *offset > SCTP_SIZE32(chk_length)))) { 3837163953Srrs *offset = length; 3838169378Srrs if (locked_tcb) { 3839163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3840169378Srrs } 3841163953Srrs return (NULL); 3842163953Srrs } 3843169420Srrs if ((netp) && (*netp)) { 3844169420Srrs ret = sctp_handle_init_ack(m, iphlen, *offset, sh, 3845169420Srrs (struct sctp_init_ack_chunk *)ch, stcb, *netp, &abort_no_unlock, vrf_id, table_id); 3846169420Srrs } else { 3847169420Srrs ret = -1; 3848169420Srrs } 3849163953Srrs /* 3850163953Srrs * Special case, I must call the output routine to 3851163953Srrs * get the cookie echoed 3852163953Srrs */ 3853168299Srrs if (abort_no_unlock) 3854168299Srrs return (NULL); 3855168299Srrs 3856163953Srrs if ((stcb) && ret == 0) 3857163953Srrs sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 3858163953Srrs *offset = length; 3859169378Srrs if (locked_tcb) { 3860163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 3861169378Srrs } 3862163953Srrs return (NULL); 3863163953Srrs break; 3864163953Srrs case SCTP_SELECTIVE_ACK: 3865169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK\n"); 3866163953Srrs SCTP_STAT_INCR(sctps_recvsacks); 3867163953Srrs { 3868163953Srrs struct sctp_sack_chunk *sack; 3869163953Srrs int abort_now = 0; 3870163953Srrs uint32_t a_rwnd, cum_ack; 3871163953Srrs uint16_t num_seg; 3872163953Srrs int nonce_sum_flag; 3873163953Srrs 3874169420Srrs if ((stcb == NULL) || (chk_length < sizeof(struct sctp_sack_chunk))) { 3875169420Srrs SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on sack chunk, too small\n"); 3876169208Srrs *offset = length; 3877169378Srrs if (locked_tcb) { 3878169352Srrs SCTP_TCB_UNLOCK(locked_tcb); 3879169378Srrs } 3880169208Srrs return (NULL); 3881169208Srrs } 3882163953Srrs sack = (struct sctp_sack_chunk *)ch; 3883163953Srrs nonce_sum_flag = ch->chunk_flags & SCTP_SACK_NONCE_SUM; 3884163953Srrs cum_ack = ntohl(sack->sack.cum_tsn_ack); 3885163953Srrs num_seg = ntohs(sack->sack.num_gap_ack_blks); 3886163953Srrs a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd); 3887163953Srrs stcb->asoc.seen_a_sack_this_pkt = 1; 3888163953Srrs if ((stcb->asoc.pr_sctp_cnt == 0) && 3889163953Srrs (num_seg == 0) && 3890163953Srrs ((compare_with_wrap(cum_ack, stcb->asoc.last_acked_seq, MAX_TSN)) || 3891163953Srrs (cum_ack == stcb->asoc.last_acked_seq)) && 3892163953Srrs (stcb->asoc.saw_sack_with_frags == 0) && 3893163953Srrs (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) 3894163953Srrs ) { 3895163953Srrs /* 3896163953Srrs * We have a SIMPLE sack having no 3897163953Srrs * prior segments and data on sent 3898163953Srrs * queue to be acked.. Use the 3899163953Srrs * faster path sack processing. We 3900163953Srrs * also allow window update sacks 3901163953Srrs * with no missing segments to go 3902163953Srrs * this way too. 3903163953Srrs */ 3904169208Srrs sctp_express_handle_sack(stcb, cum_ack, a_rwnd, nonce_sum_flag, 3905169208Srrs &abort_now); 3906163953Srrs } else { 3907169420Srrs if (netp && *netp) 3908169420Srrs sctp_handle_sack(sack, stcb, *netp, &abort_now, chk_length, a_rwnd); 3909163953Srrs } 3910163953Srrs if (abort_now) { 3911163953Srrs /* ABORT signal from sack processing */ 3912163953Srrs *offset = length; 3913163953Srrs return (NULL); 3914163953Srrs } 3915163953Srrs } 3916163953Srrs break; 3917163953Srrs case SCTP_HEARTBEAT_REQUEST: 3918169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n"); 3919169420Srrs if ((stcb) && netp && *netp) { 3920169420Srrs SCTP_STAT_INCR(sctps_recvheartbeat); 3921169420Srrs sctp_send_heartbeat_ack(stcb, m, *offset, 3922169420Srrs chk_length, *netp); 3923169420Srrs 3924169420Srrs /* He's alive so give him credit */ 3925169420Srrs stcb->asoc.overall_error_count = 0; 3926163953Srrs } 3927163953Srrs break; 3928163953Srrs case SCTP_HEARTBEAT_ACK: 3929169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT-ACK\n"); 3930169420Srrs if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) { 3931169208Srrs /* Its not ours */ 3932169352Srrs *offset = length; 3933169378Srrs if (locked_tcb) { 3934169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 3935169378Srrs } 3936169208Srrs return (NULL); 3937169208Srrs } 3938163953Srrs /* He's alive so give him credit */ 3939163953Srrs stcb->asoc.overall_error_count = 0; 3940163953Srrs SCTP_STAT_INCR(sctps_recvheartbeatack); 3941169420Srrs if (netp && *netp) 3942169420Srrs sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch, 3943169420Srrs stcb, *netp); 3944163953Srrs break; 3945163953Srrs case SCTP_ABORT_ASSOCIATION: 3946170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n", 3947170091Srrs stcb); 3948169420Srrs if ((stcb) && netp && *netp) 3949169420Srrs sctp_handle_abort((struct sctp_abort_chunk *)ch, 3950169420Srrs stcb, *netp); 3951163953Srrs *offset = length; 3952163953Srrs return (NULL); 3953163953Srrs break; 3954163953Srrs case SCTP_SHUTDOWN: 3955170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n", 3956170091Srrs stcb); 3957169420Srrs if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) { 3958169208Srrs *offset = length; 3959169378Srrs if (locked_tcb) { 3960169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 3961169378Srrs } 3962169208Srrs return (NULL); 3963169208Srrs 3964169420Srrs } 3965169420Srrs if (netp && *netp) { 3966163953Srrs int abort_flag = 0; 3967163953Srrs 3968163953Srrs sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch, 3969163953Srrs stcb, *netp, &abort_flag); 3970163953Srrs if (abort_flag) { 3971163953Srrs *offset = length; 3972163953Srrs return (NULL); 3973163953Srrs } 3974163953Srrs } 3975163953Srrs break; 3976163953Srrs case SCTP_SHUTDOWN_ACK: 3977170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-ACK, stcb %p\n", stcb); 3978169420Srrs if ((stcb) && (netp) && (*netp)) 3979169420Srrs sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp); 3980163953Srrs *offset = length; 3981163953Srrs return (NULL); 3982163953Srrs break; 3983169420Srrs 3984163953Srrs case SCTP_OPERATION_ERROR: 3985169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP-ERR\n"); 3986169420Srrs if ((stcb) && netp && *netp && sctp_handle_error(ch, stcb, *netp) < 0) { 3987169420Srrs 3988163953Srrs *offset = length; 3989163953Srrs return (NULL); 3990163953Srrs } 3991163953Srrs break; 3992163953Srrs case SCTP_COOKIE_ECHO: 3993169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, 3994170091Srrs "SCTP_COOKIE-ECHO, stcb %p\n", stcb); 3995163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 3996163953Srrs ; 3997163953Srrs } else { 3998169420Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 3999163953Srrs /* We are not interested anymore */ 4000163953Srrs *offset = length; 4001163953Srrs return (NULL); 4002163953Srrs } 4003163953Srrs } 4004163953Srrs /* 4005163953Srrs * First are we accepting? We do this again here 4006169420Srrs * sincen it is possible that a previous endpoint 4007169420Srrs * WAS listening responded to a INIT-ACK and then 4008163953Srrs * closed. We opened and bound.. and are now no 4009163953Srrs * longer listening. 4010163953Srrs */ 4011163953Srrs if (inp->sctp_socket->so_qlimit == 0) { 4012163953Srrs if ((stcb) && (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4013163953Srrs /* 4014163953Srrs * special case, is this a retran'd 4015163953Srrs * COOKIE-ECHO or a restarting assoc 4016163953Srrs * that is a peeled off or 4017163953Srrs * one-to-one style socket. 4018163953Srrs */ 4019163953Srrs goto process_cookie_anyway; 4020163953Srrs } 4021169352Srrs sctp_abort_association(inp, stcb, m, iphlen, 4022169352Srrs sh, NULL, vrf_id, 4023169352Srrs table_id); 4024163953Srrs *offset = length; 4025163953Srrs return (NULL); 4026163953Srrs } else if (inp->sctp_socket->so_qlimit) { 4027163953Srrs /* we are accepting so check limits like TCP */ 4028163953Srrs if (inp->sctp_socket->so_qlen > 4029163953Srrs inp->sctp_socket->so_qlimit) { 4030163953Srrs /* no space */ 4031163953Srrs struct mbuf *oper; 4032163953Srrs struct sctp_paramhdr *phdr; 4033163953Srrs 4034163953Srrs if (sctp_abort_if_one_2_one_hits_limit) { 4035163953Srrs oper = NULL; 4036163953Srrs oper = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 4037165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 4038163953Srrs if (oper) { 4039165647Srrs SCTP_BUF_LEN(oper) = 4040163953Srrs sizeof(struct sctp_paramhdr); 4041163953Srrs phdr = mtod(oper, 4042163953Srrs struct sctp_paramhdr *); 4043163953Srrs phdr->param_type = 4044163953Srrs htons(SCTP_CAUSE_OUT_OF_RESC); 4045163953Srrs phdr->param_length = 4046163953Srrs htons(sizeof(struct sctp_paramhdr)); 4047163953Srrs } 4048163953Srrs sctp_abort_association(inp, stcb, m, 4049169352Srrs iphlen, sh, oper, vrf_id, table_id); 4050163953Srrs } 4051163953Srrs *offset = length; 4052163953Srrs return (NULL); 4053163953Srrs } 4054163953Srrs } 4055163953Srrs process_cookie_anyway: 4056163953Srrs { 4057163953Srrs struct mbuf *ret_buf; 4058165220Srrs struct sctp_inpcb *linp; 4059163953Srrs 4060169420Srrs if (stcb) { 4061165220Srrs linp = NULL; 4062169420Srrs } else { 4063165220Srrs linp = inp; 4064169420Srrs } 4065165220Srrs 4066169420Srrs if (linp) { 4067165220Srrs SCTP_ASOC_CREATE_LOCK(linp); 4068169420Srrs } 4069169420Srrs if (netp) { 4070169420Srrs ret_buf = 4071169420Srrs sctp_handle_cookie_echo(m, iphlen, 4072169420Srrs *offset, sh, 4073169420Srrs (struct sctp_cookie_echo_chunk *)ch, 4074169420Srrs &inp, &stcb, netp, 4075169420Srrs auth_skipped, 4076169420Srrs auth_offset, 4077169420Srrs auth_len, 4078169420Srrs &locked_tcb, 4079169420Srrs vrf_id, 4080169420Srrs table_id); 4081169420Srrs } else { 4082169420Srrs ret_buf = NULL; 4083169420Srrs } 4084169420Srrs if (linp) { 4085165220Srrs SCTP_ASOC_CREATE_UNLOCK(linp); 4086169420Srrs } 4087163953Srrs if (ret_buf == NULL) { 4088163953Srrs if (locked_tcb) { 4089163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4090163953Srrs } 4091169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, 4092169420Srrs "GAK, null buffer\n"); 4093163953Srrs auth_skipped = 0; 4094163953Srrs *offset = length; 4095163953Srrs return (NULL); 4096163953Srrs } 4097163953Srrs /* if AUTH skipped, see if it verified... */ 4098163953Srrs if (auth_skipped) { 4099163953Srrs got_auth = 1; 4100163953Srrs auth_skipped = 0; 4101163953Srrs } 4102163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 4103163953Srrs /* 4104163953Srrs * Restart the timer if we have 4105163953Srrs * pending data 4106163953Srrs */ 4107163953Srrs struct sctp_tmit_chunk *chk; 4108163953Srrs 4109163953Srrs chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 4110163953Srrs if (chk) { 4111163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, 4112163953Srrs stcb->sctp_ep, stcb, 4113163953Srrs chk->whoTo); 4114163953Srrs } 4115163953Srrs } 4116163953Srrs } 4117163953Srrs break; 4118163953Srrs case SCTP_COOKIE_ACK: 4119170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE-ACK, stcb %p\n", stcb); 4120169420Srrs if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) { 4121169378Srrs if (locked_tcb) { 4122169352Srrs SCTP_TCB_UNLOCK(locked_tcb); 4123169378Srrs } 4124169352Srrs return (NULL); 4125169352Srrs } 4126163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4127163953Srrs /* We are not interested anymore */ 4128163953Srrs if ((stcb) && (stcb->asoc.total_output_queue_size)) { 4129163953Srrs ; 4130169420Srrs } else if (stcb) { 4131165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27); 4132163953Srrs *offset = length; 4133163953Srrs return (NULL); 4134163953Srrs } 4135163953Srrs } 4136163953Srrs /* He's alive so give him credit */ 4137169420Srrs if ((stcb) && netp && *netp) { 4138169378Srrs stcb->asoc.overall_error_count = 0; 4139169378Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp); 4140169378Srrs } 4141163953Srrs break; 4142163953Srrs case SCTP_ECN_ECHO: 4143169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-ECHO\n"); 4144163953Srrs /* He's alive so give him credit */ 4145169420Srrs if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) { 4146169208Srrs /* Its not ours */ 4147169378Srrs if (locked_tcb) { 4148169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4149169378Srrs } 4150169208Srrs *offset = length; 4151169208Srrs return (NULL); 4152169208Srrs } 4153169378Srrs if (stcb) { 4154169378Srrs stcb->asoc.overall_error_count = 0; 4155169378Srrs sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, 4156169378Srrs stcb); 4157169378Srrs } 4158163953Srrs break; 4159163953Srrs case SCTP_ECN_CWR: 4160169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-CWR\n"); 4161163953Srrs /* He's alive so give him credit */ 4162169420Srrs if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) { 4163169208Srrs /* Its not ours */ 4164169378Srrs if (locked_tcb) { 4165169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4166169378Srrs } 4167169208Srrs *offset = length; 4168169208Srrs return (NULL); 4169169208Srrs } 4170169378Srrs if (stcb) { 4171169378Srrs stcb->asoc.overall_error_count = 0; 4172169378Srrs sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb); 4173169378Srrs } 4174163953Srrs break; 4175163953Srrs case SCTP_SHUTDOWN_COMPLETE: 4176170091Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-COMPLETE, stcb %p\n", stcb); 4177163953Srrs /* must be first and only chunk */ 4178163953Srrs if ((num_chunks > 1) || 4179163953Srrs (length - *offset > SCTP_SIZE32(chk_length))) { 4180163953Srrs *offset = length; 4181169378Srrs if (locked_tcb) { 4182163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4183169378Srrs } 4184163953Srrs return (NULL); 4185163953Srrs } 4186169420Srrs if ((stcb) && netp && *netp) { 4187169378Srrs sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch, 4188169378Srrs stcb, *netp); 4189169378Srrs } 4190163953Srrs *offset = length; 4191163953Srrs return (NULL); 4192163953Srrs break; 4193163953Srrs case SCTP_ASCONF: 4194169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n"); 4195163953Srrs /* He's alive so give him credit */ 4196169378Srrs if (stcb) { 4197169378Srrs stcb->asoc.overall_error_count = 0; 4198169378Srrs sctp_handle_asconf(m, *offset, 4199169378Srrs (struct sctp_asconf_chunk *)ch, stcb); 4200169378Srrs } 4201163953Srrs break; 4202163953Srrs case SCTP_ASCONF_ACK: 4203169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF-ACK\n"); 4204169208Srrs if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) { 4205169208Srrs /* Its not ours */ 4206169378Srrs if (locked_tcb) { 4207169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4208169378Srrs } 4209169208Srrs *offset = length; 4210169208Srrs return (NULL); 4211169208Srrs } 4212169420Srrs if ((stcb) && netp && *netp) { 4213169378Srrs /* He's alive so give him credit */ 4214169378Srrs stcb->asoc.overall_error_count = 0; 4215169378Srrs sctp_handle_asconf_ack(m, *offset, 4216169378Srrs (struct sctp_asconf_ack_chunk *)ch, stcb, *netp); 4217169378Srrs } 4218163953Srrs break; 4219163953Srrs case SCTP_FORWARD_CUM_TSN: 4220169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD-TSN\n"); 4221169208Srrs if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) { 4222169208Srrs /* Its not ours */ 4223169378Srrs if (locked_tcb) { 4224169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4225169378Srrs } 4226169208Srrs *offset = length; 4227169208Srrs return (NULL); 4228169208Srrs } 4229163953Srrs /* He's alive so give him credit */ 4230169378Srrs if (stcb) { 4231163953Srrs int abort_flag = 0; 4232163953Srrs 4233163953Srrs stcb->asoc.overall_error_count = 0; 4234163953Srrs *fwd_tsn_seen = 1; 4235163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4236163953Srrs /* We are not interested anymore */ 4237165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28); 4238163953Srrs *offset = length; 4239163953Srrs return (NULL); 4240163953Srrs } 4241163953Srrs sctp_handle_forward_tsn(stcb, 4242163953Srrs (struct sctp_forward_tsn_chunk *)ch, &abort_flag); 4243163953Srrs if (abort_flag) { 4244163953Srrs *offset = length; 4245163953Srrs return (NULL); 4246163953Srrs } else { 4247163953Srrs stcb->asoc.overall_error_count = 0; 4248163953Srrs } 4249163953Srrs 4250163953Srrs } 4251163953Srrs break; 4252163953Srrs case SCTP_STREAM_RESET: 4253169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n"); 4254163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4255163953Srrs chk_length, chunk_buf); 4256169420Srrs if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) { 4257169208Srrs /* Its not ours */ 4258169378Srrs if (locked_tcb) { 4259169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4260169378Srrs } 4261169208Srrs *offset = length; 4262169208Srrs return (NULL); 4263169208Srrs } 4264163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4265163953Srrs /* We are not interested anymore */ 4266165220Srrs sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_29); 4267163953Srrs *offset = length; 4268163953Srrs return (NULL); 4269163953Srrs } 4270169420Srrs if (stcb->asoc.peer_supports_strreset == 0) { 4271169420Srrs /* 4272169420Srrs * hmm, peer should have announced this, but 4273169420Srrs * we will turn it on since he is sending us 4274169420Srrs * a stream reset. 4275169420Srrs */ 4276169420Srrs stcb->asoc.peer_supports_strreset = 1; 4277163953Srrs } 4278169420Srrs if (sctp_handle_stream_reset(stcb, (struct sctp_stream_reset_out_req *)ch)) { 4279169420Srrs /* stop processing */ 4280169420Srrs *offset = length; 4281169420Srrs return (NULL); 4282169420Srrs } 4283163953Srrs break; 4284163953Srrs case SCTP_PACKET_DROPPED: 4285169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n"); 4286163953Srrs /* re-get it all please */ 4287169208Srrs if (chk_length < sizeof(struct sctp_pktdrop_chunk)) { 4288169208Srrs /* Its not ours */ 4289169378Srrs if (locked_tcb) { 4290169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4291169378Srrs } 4292169208Srrs *offset = length; 4293169208Srrs return (NULL); 4294169208Srrs } 4295163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4296163953Srrs chk_length, chunk_buf); 4297163953Srrs 4298169420Srrs if (ch && (stcb) && netp && (*netp)) { 4299169378Srrs sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch, 4300169378Srrs stcb, *netp); 4301169378Srrs } 4302163953Srrs break; 4303163953Srrs 4304163953Srrs case SCTP_AUTHENTICATION: 4305169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n"); 4306163953Srrs if (sctp_auth_disable) 4307163953Srrs goto unknown_chunk; 4308163953Srrs 4309163953Srrs if (stcb == NULL) { 4310163953Srrs /* save the first AUTH for later processing */ 4311163953Srrs if (auth_skipped == 0) { 4312163953Srrs auth_offset = *offset; 4313163953Srrs auth_len = chk_length; 4314163953Srrs auth_skipped = 1; 4315163953Srrs } 4316163953Srrs /* skip this chunk (temporarily) */ 4317163953Srrs goto next_chunk; 4318163953Srrs } 4319169208Srrs if ((chk_length < (sizeof(struct sctp_auth_chunk))) || 4320169420Srrs (chk_length > (sizeof(struct sctp_auth_chunk) + 4321169420Srrs SCTP_AUTH_DIGEST_LEN_MAX))) { 4322169208Srrs /* Its not ours */ 4323169378Srrs if (locked_tcb) { 4324169295Srrs SCTP_TCB_UNLOCK(locked_tcb); 4325169378Srrs } 4326169208Srrs *offset = length; 4327169208Srrs return (NULL); 4328169208Srrs } 4329163953Srrs if (got_auth == 1) { 4330163953Srrs /* skip this chunk... it's already auth'd */ 4331163953Srrs goto next_chunk; 4332163953Srrs } 4333163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4334163953Srrs chk_length, chunk_buf); 4335163953Srrs got_auth = 1; 4336169420Srrs if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, 4337163953Srrs m, *offset)) { 4338163953Srrs /* auth HMAC failed so dump the packet */ 4339163953Srrs *offset = length; 4340163953Srrs return (stcb); 4341163953Srrs } else { 4342163953Srrs /* remaining chunks are HMAC checked */ 4343163953Srrs stcb->asoc.authenticated = 1; 4344163953Srrs } 4345163953Srrs break; 4346163953Srrs 4347163953Srrs default: 4348163953Srrs unknown_chunk: 4349163953Srrs /* it's an unknown chunk! */ 4350163953Srrs if ((ch->chunk_type & 0x40) && (stcb != NULL)) { 4351163953Srrs struct mbuf *mm; 4352163953Srrs struct sctp_paramhdr *phd; 4353163953Srrs 4354163953Srrs mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 4355165647Srrs 0, M_DONTWAIT, 1, MT_DATA); 4356163953Srrs if (mm) { 4357163953Srrs phd = mtod(mm, struct sctp_paramhdr *); 4358163953Srrs /* 4359163953Srrs * We cheat and use param type since 4360163953Srrs * we did not bother to define a 4361163953Srrs * error cause struct. They are the 4362163953Srrs * same basic format with different 4363163953Srrs * names. 4364163953Srrs */ 4365163953Srrs phd->param_type = htons(SCTP_CAUSE_UNRECOG_CHUNK); 4366163953Srrs phd->param_length = htons(chk_length + sizeof(*phd)); 4367165647Srrs SCTP_BUF_LEN(mm) = sizeof(*phd); 4368166023Srrs SCTP_BUF_NEXT(mm) = SCTP_M_COPYM(m, *offset, SCTP_SIZE32(chk_length), 4369163953Srrs M_DONTWAIT); 4370165647Srrs if (SCTP_BUF_NEXT(mm)) { 4371163953Srrs sctp_queue_op_err(stcb, mm); 4372163953Srrs } else { 4373163953Srrs sctp_m_freem(mm); 4374163953Srrs } 4375163953Srrs } 4376163953Srrs } 4377163953Srrs if ((ch->chunk_type & 0x80) == 0) { 4378163953Srrs /* discard this packet */ 4379163953Srrs *offset = length; 4380163953Srrs return (stcb); 4381163953Srrs } /* else skip this bad chunk and continue... */ 4382163953Srrs break; 4383163953Srrs } /* switch (ch->chunk_type) */ 4384163953Srrs 4385163953Srrs 4386163953Srrsnext_chunk: 4387163953Srrs /* get the next chunk */ 4388163953Srrs *offset += SCTP_SIZE32(chk_length); 4389163953Srrs if (*offset >= length) { 4390163953Srrs /* no more data left in the mbuf chain */ 4391163953Srrs break; 4392163953Srrs } 4393163953Srrs ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset, 4394163953Srrs sizeof(struct sctp_chunkhdr), chunk_buf); 4395163953Srrs if (ch == NULL) { 4396169378Srrs if (locked_tcb) { 4397163953Srrs SCTP_TCB_UNLOCK(locked_tcb); 4398169378Srrs } 4399163953Srrs *offset = length; 4400163953Srrs return (NULL); 4401163953Srrs } 4402163953Srrs } /* while */ 4403163953Srrs return (stcb); 4404163953Srrs} 4405163953Srrs 4406163953Srrs 4407163953Srrs/* 4408163953Srrs * Process the ECN bits we have something set so we must look to see if it is 4409163953Srrs * ECN(0) or ECN(1) or CE 4410163953Srrs */ 4411163953Srrsstatic __inline void 4412163953Srrssctp_process_ecn_marked_a(struct sctp_tcb *stcb, struct sctp_nets *net, 4413163953Srrs uint8_t ecn_bits) 4414163953Srrs{ 4415163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4416163953Srrs ; 4417163953Srrs } else if ((ecn_bits & SCTP_ECT1_BIT) == SCTP_ECT1_BIT) { 4418163953Srrs /* 4419163953Srrs * we only add to the nonce sum for ECT1, ECT0 does not 4420163953Srrs * change the NS bit (that we have yet to find a way to send 4421163953Srrs * it yet). 4422163953Srrs */ 4423163953Srrs 4424163953Srrs /* ECN Nonce stuff */ 4425163953Srrs stcb->asoc.receiver_nonce_sum++; 4426163953Srrs stcb->asoc.receiver_nonce_sum &= SCTP_SACK_NONCE_SUM; 4427163953Srrs 4428163953Srrs /* 4429163953Srrs * Drag up the last_echo point if cumack is larger since we 4430163953Srrs * don't want the point falling way behind by more than 4431163953Srrs * 2^^31 and then having it be incorrect. 4432163953Srrs */ 4433163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4434163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4435163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4436163953Srrs } 4437163953Srrs } else if ((ecn_bits & SCTP_ECT0_BIT) == SCTP_ECT0_BIT) { 4438163953Srrs /* 4439163953Srrs * Drag up the last_echo point if cumack is larger since we 4440163953Srrs * don't want the point falling way behind by more than 4441163953Srrs * 2^^31 and then having it be incorrect. 4442163953Srrs */ 4443163953Srrs if (compare_with_wrap(stcb->asoc.cumulative_tsn, 4444163953Srrs stcb->asoc.last_echo_tsn, MAX_TSN)) { 4445163953Srrs stcb->asoc.last_echo_tsn = stcb->asoc.cumulative_tsn; 4446163953Srrs } 4447163953Srrs } 4448163953Srrs} 4449163953Srrs 4450163953Srrsstatic __inline void 4451163953Srrssctp_process_ecn_marked_b(struct sctp_tcb *stcb, struct sctp_nets *net, 4452163953Srrs uint32_t high_tsn, uint8_t ecn_bits) 4453163953Srrs{ 4454163953Srrs if ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS) { 4455163953Srrs /* 4456163953Srrs * we possibly must notify the sender that a congestion 4457163953Srrs * window reduction is in order. We do this by adding a ECNE 4458163953Srrs * chunk to the output chunk queue. The incoming CWR will 4459163953Srrs * remove this chunk. 4460163953Srrs */ 4461163953Srrs if (compare_with_wrap(high_tsn, stcb->asoc.last_echo_tsn, 4462163953Srrs MAX_TSN)) { 4463163953Srrs /* Yep, we need to add a ECNE */ 4464163953Srrs sctp_send_ecn_echo(stcb, net, high_tsn); 4465163953Srrs stcb->asoc.last_echo_tsn = high_tsn; 4466163953Srrs } 4467163953Srrs } 4468163953Srrs} 4469163953Srrs 4470163953Srrs/* 4471163953Srrs * common input chunk processing (v4 and v6) 4472163953Srrs */ 4473169378Srrsvoid 4474163953Srrssctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, 4475163953Srrs int length, struct sctphdr *sh, struct sctp_chunkhdr *ch, 4476163953Srrs struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, 4477169352Srrs uint8_t ecn_bits, uint32_t vrf_id, uint32_t table_id) 4478163953Srrs{ 4479163953Srrs /* 4480163953Srrs * Control chunk processing 4481163953Srrs */ 4482163953Srrs uint32_t high_tsn; 4483163953Srrs int fwd_tsn_seen = 0, data_processed = 0; 4484163953Srrs struct mbuf *m = *mm; 4485163953Srrs int abort_flag = 0; 4486163953Srrs int un_sent; 4487163953Srrs 4488163953Srrs SCTP_STAT_INCR(sctps_recvdatagrams); 4489163953Srrs#ifdef SCTP_AUDITING_ENABLED 4490163953Srrs sctp_audit_log(0xE0, 1); 4491163953Srrs sctp_auditing(0, inp, stcb, net); 4492163953Srrs#endif 4493163953Srrs 4494169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d\n", 4495169420Srrs m, iphlen, offset); 4496163953Srrs 4497163953Srrs if (stcb) { 4498163953Srrs /* always clear this before beginning a packet */ 4499163953Srrs stcb->asoc.authenticated = 0; 4500163953Srrs stcb->asoc.seen_a_sack_this_pkt = 0; 4501163953Srrs } 4502163953Srrs if (IS_SCTP_CONTROL(ch)) { 4503163953Srrs /* process the control portion of the SCTP packet */ 4504169655Srrs /* sa_ignore NO_NULL_CHK */ 4505163953Srrs stcb = sctp_process_control(m, iphlen, &offset, length, sh, ch, 4506169352Srrs inp, stcb, &net, &fwd_tsn_seen, vrf_id, table_id); 4507163953Srrs if (stcb) { 4508163953Srrs /* 4509163953Srrs * This covers us if the cookie-echo was there and 4510163953Srrs * it changes our INP. 4511163953Srrs */ 4512163953Srrs inp = stcb->sctp_ep; 4513163953Srrs } 4514163953Srrs } else { 4515163953Srrs /* 4516163953Srrs * no control chunks, so pre-process DATA chunks (these 4517163953Srrs * checks are taken care of by control processing) 4518163953Srrs */ 4519163953Srrs 4520163953Srrs /* 4521163953Srrs * if DATA only packet, and auth is required, then punt... 4522163953Srrs * can't have authenticated without any AUTH (control) 4523163953Srrs * chunks 4524163953Srrs */ 4525163953Srrs if ((stcb != NULL) && !sctp_auth_disable && 4526163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4527163953Srrs stcb->asoc.local_auth_chunks)) { 4528163953Srrs /* "silently" ignore */ 4529163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4530163953Srrs SCTP_TCB_UNLOCK(stcb); 4531169378Srrs return; 4532163953Srrs } 4533163953Srrs if (stcb == NULL) { 4534163953Srrs /* out of the blue DATA chunk */ 4535169352Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL, 4536169352Srrs vrf_id, table_id); 4537169378Srrs return; 4538163953Srrs } 4539163953Srrs if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) { 4540163953Srrs /* v_tag mismatch! */ 4541163953Srrs SCTP_STAT_INCR(sctps_badvtag); 4542163953Srrs SCTP_TCB_UNLOCK(stcb); 4543169378Srrs return; 4544163953Srrs } 4545163953Srrs } 4546163953Srrs 4547163953Srrs if (stcb == NULL) { 4548163953Srrs /* 4549163953Srrs * no valid TCB for this packet, or we found it's a bad 4550163953Srrs * packet while processing control, or we're done with this 4551163953Srrs * packet (done or skip rest of data), so we drop it... 4552163953Srrs */ 4553169378Srrs return; 4554163953Srrs } 4555163953Srrs /* 4556163953Srrs * DATA chunk processing 4557163953Srrs */ 4558163953Srrs /* plow through the data chunks while length > offset */ 4559163953Srrs 4560163953Srrs /* 4561163953Srrs * Rest should be DATA only. Check authentication state if AUTH for 4562163953Srrs * DATA is required. 4563163953Srrs */ 4564165220Srrs if ((length > offset) && (stcb != NULL) && !sctp_auth_disable && 4565163953Srrs sctp_auth_is_required_chunk(SCTP_DATA, 4566163953Srrs stcb->asoc.local_auth_chunks) && 4567163953Srrs !stcb->asoc.authenticated) { 4568163953Srrs /* "silently" ignore */ 4569163953Srrs SCTP_STAT_INCR(sctps_recvauthmissing); 4570169420Srrs SCTPDBG(SCTP_DEBUG_AUTH1, 4571169420Srrs "Data chunk requires AUTH, skipped\n"); 4572165220Srrs goto trigger_send; 4573163953Srrs } 4574163953Srrs if (length > offset) { 4575163953Srrs int retval; 4576163953Srrs 4577163953Srrs /* 4578163953Srrs * First check to make sure our state is correct. We would 4579163953Srrs * not get here unless we really did have a tag, so we don't 4580163953Srrs * abort if this happens, just dump the chunk silently. 4581163953Srrs */ 4582163953Srrs switch (SCTP_GET_STATE(&stcb->asoc)) { 4583163953Srrs case SCTP_STATE_COOKIE_ECHOED: 4584163953Srrs /* 4585163953Srrs * we consider data with valid tags in this state 4586163953Srrs * shows us the cookie-ack was lost. Imply it was 4587163953Srrs * there. 4588163953Srrs */ 4589163953Srrs stcb->asoc.overall_error_count = 0; 4590163953Srrs sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net); 4591163953Srrs break; 4592163953Srrs case SCTP_STATE_COOKIE_WAIT: 4593163953Srrs /* 4594163953Srrs * We consider OOTB any data sent during asoc setup. 4595163953Srrs */ 4596169352Srrs sctp_handle_ootb(m, iphlen, offset, sh, inp, NULL, 4597169352Srrs vrf_id, table_id); 4598163953Srrs SCTP_TCB_UNLOCK(stcb); 4599169378Srrs return; 4600163953Srrs break; 4601163953Srrs case SCTP_STATE_EMPTY: /* should not happen */ 4602163953Srrs case SCTP_STATE_INUSE: /* should not happen */ 4603163953Srrs case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */ 4604163953Srrs case SCTP_STATE_SHUTDOWN_ACK_SENT: 4605163953Srrs default: 4606163953Srrs SCTP_TCB_UNLOCK(stcb); 4607169378Srrs return; 4608163953Srrs break; 4609163953Srrs case SCTP_STATE_OPEN: 4610163953Srrs case SCTP_STATE_SHUTDOWN_SENT: 4611163953Srrs break; 4612163953Srrs } 4613163953Srrs /* take care of ECN, part 1. */ 4614163953Srrs if (stcb->asoc.ecn_allowed && 4615163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4616163953Srrs sctp_process_ecn_marked_a(stcb, net, ecn_bits); 4617163953Srrs } 4618163953Srrs /* plow through the data chunks while length > offset */ 4619163953Srrs retval = sctp_process_data(mm, iphlen, &offset, length, sh, 4620163953Srrs inp, stcb, net, &high_tsn); 4621163953Srrs if (retval == 2) { 4622163953Srrs /* 4623163953Srrs * The association aborted, NO UNLOCK needed since 4624163953Srrs * the association is destroyed. 4625163953Srrs */ 4626169378Srrs return; 4627163953Srrs } 4628163953Srrs data_processed = 1; 4629163953Srrs if (retval == 0) { 4630163953Srrs /* take care of ecn part 2. */ 4631163953Srrs if (stcb->asoc.ecn_allowed && 4632163953Srrs (ecn_bits & (SCTP_ECT0_BIT | SCTP_ECT1_BIT))) { 4633163953Srrs sctp_process_ecn_marked_b(stcb, net, high_tsn, 4634163953Srrs ecn_bits); 4635163953Srrs } 4636163953Srrs } 4637163953Srrs /* 4638163953Srrs * Anything important needs to have been m_copy'ed in 4639163953Srrs * process_data 4640163953Srrs */ 4641163953Srrs } 4642163953Srrs if ((data_processed == 0) && (fwd_tsn_seen)) { 4643163953Srrs int was_a_gap = 0; 4644163953Srrs 4645163953Srrs if (compare_with_wrap(stcb->asoc.highest_tsn_inside_map, 4646163953Srrs stcb->asoc.cumulative_tsn, MAX_TSN)) { 4647163953Srrs /* there was a gap before this data was processed */ 4648163953Srrs was_a_gap = 1; 4649163953Srrs } 4650163953Srrs sctp_sack_check(stcb, 1, was_a_gap, &abort_flag); 4651163953Srrs if (abort_flag) { 4652163953Srrs /* Again, we aborted so NO UNLOCK needed */ 4653169378Srrs return; 4654163953Srrs } 4655163953Srrs } 4656163953Srrs /* trigger send of any chunks in queue... */ 4657165220Srrstrigger_send: 4658163953Srrs#ifdef SCTP_AUDITING_ENABLED 4659163953Srrs sctp_audit_log(0xE0, 2); 4660163953Srrs sctp_auditing(1, inp, stcb, net); 4661163953Srrs#endif 4662169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 4663169420Srrs "Check for chunk output prw:%d tqe:%d tf=%d\n", 4664169420Srrs stcb->asoc.peers_rwnd, 4665169420Srrs TAILQ_EMPTY(&stcb->asoc.control_send_queue), 4666169420Srrs stcb->asoc.total_flight); 4667163953Srrs un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 4668163953Srrs 4669163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue) || 4670163953Srrs ((un_sent) && 4671163953Srrs (stcb->asoc.peers_rwnd > 0 || 4672163953Srrs (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) { 4673169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n"); 4674163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC); 4675169420Srrs SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n"); 4676163953Srrs } 4677163953Srrs#ifdef SCTP_AUDITING_ENABLED 4678163953Srrs sctp_audit_log(0xE0, 3); 4679163953Srrs sctp_auditing(2, inp, stcb, net); 4680163953Srrs#endif 4681163953Srrs SCTP_TCB_UNLOCK(stcb); 4682169378Srrs return; 4683163953Srrs} 4684163953Srrs 4685163953Srrs 4686163953Srrs 4687163953Srrsvoid 4688165647Srrssctp_input(i_pak, off) 4689165647Srrs struct mbuf *i_pak; 4690163953Srrs int off; 4691163953Srrs 4692163953Srrs{ 4693163953Srrs#ifdef SCTP_MBUF_LOGGING 4694163953Srrs struct mbuf *mat; 4695163953Srrs 4696163953Srrs#endif 4697165647Srrs struct mbuf *m; 4698163953Srrs int iphlen; 4699169352Srrs uint32_t vrf_id = 0, table_id = 0; 4700163953Srrs uint8_t ecn_bits; 4701163953Srrs struct ip *ip; 4702163953Srrs struct sctphdr *sh; 4703163953Srrs struct sctp_inpcb *inp = NULL; 4704163953Srrs 4705163953Srrs uint32_t check, calc_check; 4706163953Srrs struct sctp_nets *net; 4707163953Srrs struct sctp_tcb *stcb = NULL; 4708163953Srrs struct sctp_chunkhdr *ch; 4709163953Srrs int refcount_up = 0; 4710163953Srrs int length, mlen, offset; 4711163953Srrs 4712169352Srrs 4713169352Srrs if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) { 4714169352Srrs SCTP_RELEASE_PKT(i_pak); 4715169352Srrs return; 4716169352Srrs } 4717169352Srrs if (SCTP_GET_PKT_TABLEID(i_pak, table_id)) { 4718169352Srrs SCTP_RELEASE_PKT(i_pak); 4719169352Srrs return; 4720169352Srrs } 4721168299Srrs mlen = SCTP_HEADER_LEN(i_pak); 4722163953Srrs iphlen = off; 4723165647Srrs m = SCTP_HEADER_TO_CHAIN(i_pak); 4724170056Srrs 4725163953Srrs net = NULL; 4726163953Srrs SCTP_STAT_INCR(sctps_recvpackets); 4727163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 4728163953Srrs 4729170091Srrs 4730163953Srrs#ifdef SCTP_MBUF_LOGGING 4731163953Srrs /* Log in any input mbufs */ 4732163953Srrs mat = m; 4733163953Srrs while (mat) { 4734165647Srrs if (SCTP_BUF_IS_EXTENDED(mat)) { 4735163953Srrs sctp_log_mb(mat, SCTP_MBUF_INPUT); 4736163953Srrs } 4737165647Srrs mat = SCTP_BUF_NEXT(mat); 4738163953Srrs } 4739163953Srrs#endif 4740170091Srrs#ifdef SCTP_PACKET_LOGGING 4741170091Srrs sctp_packet_log(m, mlen); 4742170091Srrs#endif 4743170091Srrs /* 4744170091Srrs * Must take out the iphlen, since mlen expects this (only effect lb 4745170091Srrs * case) 4746170091Srrs */ 4747170091Srrs mlen -= iphlen; 4748168124Srrs 4749163953Srrs /* 4750163953Srrs * Get IP, SCTP, and first chunk header together in first mbuf. 4751163953Srrs */ 4752163953Srrs ip = mtod(m, struct ip *); 4753163953Srrs offset = iphlen + sizeof(*sh) + sizeof(*ch); 4754165647Srrs if (SCTP_BUF_LEN(m) < offset) { 4755163953Srrs if ((m = m_pullup(m, offset)) == 0) { 4756163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4757163953Srrs return; 4758163953Srrs } 4759163953Srrs ip = mtod(m, struct ip *); 4760163953Srrs } 4761163953Srrs sh = (struct sctphdr *)((caddr_t)ip + iphlen); 4762163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(*sh)); 4763163953Srrs 4764163953Srrs /* SCTP does not allow broadcasts or multicasts */ 4765163953Srrs if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { 4766163953Srrs goto bad; 4767163953Srrs } 4768168124Srrs if (SCTP_IS_IT_BROADCAST(ip->ip_dst, m)) { 4769163953Srrs /* 4770163953Srrs * We only look at broadcast if its a front state, All 4771163953Srrs * others we will not have a tcb for anyway. 4772163953Srrs */ 4773163953Srrs goto bad; 4774163953Srrs } 4775163953Srrs /* validate SCTP checksum */ 4776168124Srrs if ((sctp_no_csum_on_loopback == 0) || !SCTP_IS_IT_LOOPBACK(m)) { 4777163953Srrs /* 4778163953Srrs * we do NOT validate things from the loopback if the sysctl 4779163953Srrs * is set to 1. 4780163953Srrs */ 4781163953Srrs check = sh->checksum; /* save incoming checksum */ 4782163953Srrs if ((check == 0) && (sctp_no_csum_on_loopback)) { 4783163953Srrs /* 4784163953Srrs * special hook for where we got a local address 4785163953Srrs * somehow routed across a non IFT_LOOP type 4786163953Srrs * interface 4787163953Srrs */ 4788163953Srrs if (ip->ip_src.s_addr == ip->ip_dst.s_addr) 4789163953Srrs goto sctp_skip_csum_4; 4790163953Srrs } 4791163953Srrs sh->checksum = 0; /* prepare for calc */ 4792163953Srrs calc_check = sctp_calculate_sum(m, &mlen, iphlen); 4793163953Srrs if (calc_check != check) { 4794169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 4795169420Srrs calc_check, check, m, mlen, iphlen); 4796163953Srrs 4797163953Srrs stcb = sctp_findassociation_addr(m, iphlen, 4798163953Srrs offset - sizeof(*ch), 4799169420Srrs sh, ch, &inp, &net, 4800169420Srrs vrf_id); 4801163953Srrs if ((inp) && (stcb)) { 4802163953Srrs sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 4803163953Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR); 4804163953Srrs } else if ((inp != NULL) && (stcb == NULL)) { 4805163953Srrs refcount_up = 1; 4806163953Srrs } 4807163953Srrs SCTP_STAT_INCR(sctps_badsum); 4808163953Srrs SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 4809163953Srrs goto bad; 4810163953Srrs } 4811163953Srrs sh->checksum = calc_check; 4812168299Srrs } 4813163953Srrssctp_skip_csum_4: 4814168124Srrs /* destination port of 0 is illegal, based on RFC2960. */ 4815168124Srrs if (sh->dest_port == 0) { 4816168124Srrs SCTP_STAT_INCR(sctps_hdrops); 4817168124Srrs goto bad; 4818168124Srrs } 4819163953Srrs /* validate mbuf chain length with IP payload length */ 4820163953Srrs if (mlen < (ip->ip_len - iphlen)) { 4821163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4822163953Srrs goto bad; 4823163953Srrs } 4824163953Srrs /* 4825163953Srrs * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 4826163953Srrs * IP/SCTP/first chunk header... 4827163953Srrs */ 4828163953Srrs stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 4829168299Srrs sh, ch, &inp, &net, vrf_id); 4830163953Srrs /* inp's ref-count increased && stcb locked */ 4831163953Srrs if (inp == NULL) { 4832163953Srrs struct sctp_init_chunk *init_chk, chunk_buf; 4833163953Srrs 4834163953Srrs SCTP_STAT_INCR(sctps_noport); 4835163953Srrs#ifdef ICMP_BANDLIM 4836163953Srrs /* 4837163953Srrs * we use the bandwidth limiting to protect against sending 4838163953Srrs * too many ABORTS all at once. In this case these count the 4839163953Srrs * same as an ICMP message. 4840163953Srrs */ 4841163953Srrs if (badport_bandlim(0) < 0) 4842163953Srrs goto bad; 4843163953Srrs#endif /* ICMP_BANDLIM */ 4844169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 4845169420Srrs "Sending a ABORT from packet entry!\n"); 4846163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 4847163953Srrs /* 4848163953Srrs * we do a trick here to get the INIT tag, dig in 4849163953Srrs * and get the tag from the INIT and put it in the 4850163953Srrs * common header. 4851163953Srrs */ 4852163953Srrs init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 4853163953Srrs iphlen + sizeof(*sh), sizeof(*init_chk), 4854163953Srrs (uint8_t *) & chunk_buf); 4855163953Srrs if (init_chk != NULL) 4856163953Srrs sh->v_tag = init_chk->init.initiate_tag; 4857163953Srrs } 4858165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 4859169352Srrs sctp_send_shutdown_complete2(m, iphlen, sh, vrf_id, 4860169352Srrs table_id); 4861165220Srrs goto bad; 4862165220Srrs } 4863165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 4864165220Srrs goto bad; 4865165220Srrs } 4866165220Srrs if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 4867169352Srrs sctp_send_abort(m, iphlen, sh, 0, NULL, vrf_id, 4868169352Srrs table_id); 4869163953Srrs goto bad; 4870163953Srrs } else if (stcb == NULL) { 4871163953Srrs refcount_up = 1; 4872163953Srrs } 4873163953Srrs#ifdef IPSEC 4874163953Srrs /* 4875163953Srrs * I very much doubt any of the IPSEC stuff will work but I have no 4876163953Srrs * idea, so I will leave it in place. 4877163953Srrs */ 4878163953Srrs 4879163996Srrs if (inp && ipsec4_in_reject(m, &inp->ip_inp.inp)) { 4880163953Srrs ipsecstat.in_polvio++; 4881163953Srrs SCTP_STAT_INCR(sctps_hdrops); 4882163953Srrs goto bad; 4883163953Srrs } 4884163953Srrs#endif /* IPSEC */ 4885163953Srrs 4886163953Srrs /* 4887163953Srrs * common chunk processing 4888163953Srrs */ 4889163953Srrs length = ip->ip_len + iphlen; 4890163953Srrs offset -= sizeof(struct sctp_chunkhdr); 4891163953Srrs 4892163953Srrs ecn_bits = ip->ip_tos; 4893163953Srrs 4894169655Srrs /* sa_ignore NO_NULL_CHK */ 4895163953Srrs sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 4896169352Srrs inp, stcb, net, ecn_bits, vrf_id, 4897169352Srrs table_id); 4898163953Srrs /* inp's ref-count reduced && stcb unlocked */ 4899163953Srrs if (m) { 4900163953Srrs sctp_m_freem(m); 4901163953Srrs } 4902163953Srrs if ((inp) && (refcount_up)) { 4903163953Srrs /* reduce ref-count */ 4904163953Srrs SCTP_INP_WLOCK(inp); 4905163953Srrs SCTP_INP_DECR_REF(inp); 4906163953Srrs SCTP_INP_WUNLOCK(inp); 4907163953Srrs } 4908163953Srrs return; 4909163953Srrsbad: 4910169420Srrs if (stcb) { 4911163953Srrs SCTP_TCB_UNLOCK(stcb); 4912169420Srrs } 4913163953Srrs if ((inp) && (refcount_up)) { 4914163953Srrs /* reduce ref-count */ 4915163953Srrs SCTP_INP_WLOCK(inp); 4916163953Srrs SCTP_INP_DECR_REF(inp); 4917163953Srrs SCTP_INP_WUNLOCK(inp); 4918163953Srrs } 4919163953Srrs if (m) { 4920163953Srrs sctp_m_freem(m); 4921163953Srrs } 4922163953Srrs return; 4923163953Srrs} 4924