sys/netinet/sctputil.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <netinet/sctp_pcb.h>
  38 #include <netinet/sctputil.h>
  39 #include <netinet/sctp_var.h>
  40 #include <netinet/sctp_sysctl.h>
  41 #ifdef INET6
  42 #include <netinet6/sctp6_var.h>
  43 #endif
  44 #include <netinet/sctp_header.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_uio.h>
  47 #include <netinet/sctp_timer.h>
  48 #include <netinet/sctp_indata.h>/* for sctp_deliver_data() */
  49 #include <netinet/sctp_auth.h>
  50 #include <netinet/sctp_asconf.h>
  51 #include <netinet/sctp_bsd_addr.h>
  52 #include <netinet/udp.h>
  53 #include <netinet/udp_var.h>
  54 #include <sys/proc.h>
  55
  56
  57 #ifndef KTR_SCTP
  58 #define KTR_SCTP KTR_SUBSYS
  59 #endif
  60
  61 extern struct sctp_cc_functions sctp_cc_functions[];
  62 extern struct sctp_ss_functions sctp_ss_functions[];
  63
  64 void
  65 sctp_sblog(struct sockbuf *sb, struct sctp_tcb *stcb, int from, int incr)
  66 {
  67         struct sctp_cwnd_log sctp_clog;
  68
  69         sctp_clog.x.sb.stcb = stcb;
  70         sctp_clog.x.sb.so_sbcc = sb->sb_cc;
  71         if (stcb)
  72                 sctp_clog.x.sb.stcb_sbcc = stcb->asoc.sb_cc;
  73         else
  74                 sctp_clog.x.sb.stcb_sbcc = 0;
  75         sctp_clog.x.sb.incr = incr;
  76         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
  77             SCTP_LOG_EVENT_SB,
  78             from,
  79             sctp_clog.x.misc.log1,
  80             sctp_clog.x.misc.log2,
  81             sctp_clog.x.misc.log3,
  82             sctp_clog.x.misc.log4);
  83 }
  84
  85 void
  86 sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc)
  87 {
  88         struct sctp_cwnd_log sctp_clog;
  89
  90         sctp_clog.x.close.inp = (void *)inp;
  91         sctp_clog.x.close.sctp_flags = inp->sctp_flags;
  92         if (stcb) {
  93                 sctp_clog.x.close.stcb = (void *)stcb;
  94                 sctp_clog.x.close.state = (uint16_t) stcb->asoc.state;
  95         } else {
  96                 sctp_clog.x.close.stcb = 0;
  97                 sctp_clog.x.close.state = 0;
  98         }
  99         sctp_clog.x.close.loc = loc;
 100         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 101             SCTP_LOG_EVENT_CLOSE,
 102             0,
 103             sctp_clog.x.misc.log1,
 104             sctp_clog.x.misc.log2,
 105             sctp_clog.x.misc.log3,
 106             sctp_clog.x.misc.log4);
 107 }
 108
 109 void
 110 rto_logging(struct sctp_nets *net, int from)
 111 {
 112         struct sctp_cwnd_log sctp_clog;
 113
 114         memset(&sctp_clog, 0, sizeof(sctp_clog));
 115         sctp_clog.x.rto.net = (void *)net;
 116         sctp_clog.x.rto.rtt = net->rtt / 1000;
 117         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 118             SCTP_LOG_EVENT_RTT,
 119             from,
 120             sctp_clog.x.misc.log1,
 121             sctp_clog.x.misc.log2,
 122             sctp_clog.x.misc.log3,
 123             sctp_clog.x.misc.log4);
 124 }
 125
 126 void
 127 sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t tsn, uint16_t sseq, uint16_t stream, int from)
 128 {
 129         struct sctp_cwnd_log sctp_clog;
 130
 131         sctp_clog.x.strlog.stcb = stcb;
 132         sctp_clog.x.strlog.n_tsn = tsn;
 133         sctp_clog.x.strlog.n_sseq = sseq;
 134         sctp_clog.x.strlog.e_tsn = 0;
 135         sctp_clog.x.strlog.e_sseq = 0;
 136         sctp_clog.x.strlog.strm = stream;
 137         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 138             SCTP_LOG_EVENT_STRM,
 139             from,
 140             sctp_clog.x.misc.log1,
 141             sctp_clog.x.misc.log2,
 142             sctp_clog.x.misc.log3,
 143             sctp_clog.x.misc.log4);
 144 }
 145
 146 void
 147 sctp_log_nagle_event(struct sctp_tcb *stcb, int action)
 148 {
 149         struct sctp_cwnd_log sctp_clog;
 150
 151         sctp_clog.x.nagle.stcb = (void *)stcb;
 152         sctp_clog.x.nagle.total_flight = stcb->asoc.total_flight;
 153         sctp_clog.x.nagle.total_in_queue = stcb->asoc.total_output_queue_size;
 154         sctp_clog.x.nagle.count_in_queue = stcb->asoc.chunks_on_out_queue;
 155         sctp_clog.x.nagle.count_in_flight = stcb->asoc.total_flight_count;
 156         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 157             SCTP_LOG_EVENT_NAGLE,
 158             action,
 159             sctp_clog.x.misc.log1,
 160             sctp_clog.x.misc.log2,
 161             sctp_clog.x.misc.log3,
 162             sctp_clog.x.misc.log4);
 163 }
 164
 165 void
 166 sctp_log_sack(uint32_t old_cumack, uint32_t cumack, uint32_t tsn, uint16_t gaps, uint16_t dups, int from)
 167 {
 168         struct sctp_cwnd_log sctp_clog;
 169
 170         sctp_clog.x.sack.cumack = cumack;
 171         sctp_clog.x.sack.oldcumack = old_cumack;
 172         sctp_clog.x.sack.tsn = tsn;
 173         sctp_clog.x.sack.numGaps = gaps;
 174         sctp_clog.x.sack.numDups = dups;
 175         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 176             SCTP_LOG_EVENT_SACK,
 177             from,
 178             sctp_clog.x.misc.log1,
 179             sctp_clog.x.misc.log2,
 180             sctp_clog.x.misc.log3,
 181             sctp_clog.x.misc.log4);
 182 }
 183
 184 void
 185 sctp_log_map(uint32_t map, uint32_t cum, uint32_t high, int from)
 186 {
 187         struct sctp_cwnd_log sctp_clog;
 188
 189         memset(&sctp_clog, 0, sizeof(sctp_clog));
 190         sctp_clog.x.map.base = map;
 191         sctp_clog.x.map.cum = cum;
 192         sctp_clog.x.map.high = high;
 193         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 194             SCTP_LOG_EVENT_MAP,
 195             from,
 196             sctp_clog.x.misc.log1,
 197             sctp_clog.x.misc.log2,
 198             sctp_clog.x.misc.log3,
 199             sctp_clog.x.misc.log4);
 200 }
 201
 202 void
 203 sctp_log_fr(uint32_t biggest_tsn, uint32_t biggest_new_tsn, uint32_t tsn, int from)
 204 {
 205         struct sctp_cwnd_log sctp_clog;
 206
 207         memset(&sctp_clog, 0, sizeof(sctp_clog));
 208         sctp_clog.x.fr.largest_tsn = biggest_tsn;
 209         sctp_clog.x.fr.largest_new_tsn = biggest_new_tsn;
 210         sctp_clog.x.fr.tsn = tsn;
 211         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 212             SCTP_LOG_EVENT_FR,
 213             from,
 214             sctp_clog.x.misc.log1,
 215             sctp_clog.x.misc.log2,
 216             sctp_clog.x.misc.log3,
 217             sctp_clog.x.misc.log4);
 218 }
 219
 220 void
 221 sctp_log_mb(struct mbuf *m, int from)
 222 {
 223         struct sctp_cwnd_log sctp_clog;
 224
 225         sctp_clog.x.mb.mp = m;
 226         sctp_clog.x.mb.mbuf_flags = (uint8_t) (SCTP_BUF_GET_FLAGS(m));
 227         sctp_clog.x.mb.size = (uint16_t) (SCTP_BUF_LEN(m));
 228         sctp_clog.x.mb.data = SCTP_BUF_AT(m, 0);
 229         if (SCTP_BUF_IS_EXTENDED(m)) {
 230                 sctp_clog.x.mb.ext = SCTP_BUF_EXTEND_BASE(m);
 231                 sctp_clog.x.mb.refcnt = (uint8_t) (SCTP_BUF_EXTEND_REFCNT(m));
 232         } else {
 233                 sctp_clog.x.mb.ext = 0;
 234                 sctp_clog.x.mb.refcnt = 0;
 235         }
 236         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 237             SCTP_LOG_EVENT_MBUF,
 238             from,
 239             sctp_clog.x.misc.log1,
 240             sctp_clog.x.misc.log2,
 241             sctp_clog.x.misc.log3,
 242             sctp_clog.x.misc.log4);
 243 }
 244
 245 void
 246 sctp_log_strm_del(struct sctp_queued_to_read *control, struct sctp_queued_to_read *poschk, int from)
 247 {
 248         struct sctp_cwnd_log sctp_clog;
 249
 250         if (control == NULL) {
 251                 SCTP_PRINTF("Gak log of NULL?\n");
 252                 return;
 253         }
 254         sctp_clog.x.strlog.stcb = control->stcb;
 255         sctp_clog.x.strlog.n_tsn = control->sinfo_tsn;
 256         sctp_clog.x.strlog.n_sseq = control->sinfo_ssn;
 257         sctp_clog.x.strlog.strm = control->sinfo_stream;
 258         if (poschk != NULL) {
 259                 sctp_clog.x.strlog.e_tsn = poschk->sinfo_tsn;
 260                 sctp_clog.x.strlog.e_sseq = poschk->sinfo_ssn;
 261         } else {
 262                 sctp_clog.x.strlog.e_tsn = 0;
 263                 sctp_clog.x.strlog.e_sseq = 0;
 264         }
 265         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 266             SCTP_LOG_EVENT_STRM,
 267             from,
 268             sctp_clog.x.misc.log1,
 269             sctp_clog.x.misc.log2,
 270             sctp_clog.x.misc.log3,
 271             sctp_clog.x.misc.log4);
 272 }
 273
 274 void
 275 sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *net, int augment, uint8_t from)
 276 {
 277         struct sctp_cwnd_log sctp_clog;
 278
 279         sctp_clog.x.cwnd.net = net;
 280         if (stcb->asoc.send_queue_cnt > 255)
 281                 sctp_clog.x.cwnd.cnt_in_send = 255;
 282         else
 283                 sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
 284         if (stcb->asoc.stream_queue_cnt > 255)
 285                 sctp_clog.x.cwnd.cnt_in_str = 255;
 286         else
 287                 sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
 288
 289         if (net) {
 290                 sctp_clog.x.cwnd.cwnd_new_value = net->cwnd;
 291                 sctp_clog.x.cwnd.inflight = net->flight_size;
 292                 sctp_clog.x.cwnd.pseudo_cumack = net->pseudo_cumack;
 293                 sctp_clog.x.cwnd.meets_pseudo_cumack = net->new_pseudo_cumack;
 294                 sctp_clog.x.cwnd.need_new_pseudo_cumack = net->find_pseudo_cumack;
 295         }
 296         if (SCTP_CWNDLOG_PRESEND == from) {
 297                 sctp_clog.x.cwnd.meets_pseudo_cumack = stcb->asoc.peers_rwnd;
 298         }
 299         sctp_clog.x.cwnd.cwnd_augment = augment;
 300         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 301             SCTP_LOG_EVENT_CWND,
 302             from,
 303             sctp_clog.x.misc.log1,
 304             sctp_clog.x.misc.log2,
 305             sctp_clog.x.misc.log3,
 306             sctp_clog.x.misc.log4);
 307 }
 308
 309 void
 310 sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from)
 311 {
 312         struct sctp_cwnd_log sctp_clog;
 313
 314         memset(&sctp_clog, 0, sizeof(sctp_clog));
 315         if (inp) {
 316                 sctp_clog.x.lock.sock = (void *)inp->sctp_socket;
 317
 318         } else {
 319                 sctp_clog.x.lock.sock = (void *)NULL;
 320         }
 321         sctp_clog.x.lock.inp = (void *)inp;
 322         if (stcb) {
 323                 sctp_clog.x.lock.tcb_lock = mtx_owned(&stcb->tcb_mtx);
 324         } else {
 325                 sctp_clog.x.lock.tcb_lock = SCTP_LOCK_UNKNOWN;
 326         }
 327         if (inp) {
 328                 sctp_clog.x.lock.inp_lock = mtx_owned(&inp->inp_mtx);
 329                 sctp_clog.x.lock.create_lock = mtx_owned(&inp->inp_create_mtx);
 330         } else {
 331                 sctp_clog.x.lock.inp_lock = SCTP_LOCK_UNKNOWN;
 332                 sctp_clog.x.lock.create_lock = SCTP_LOCK_UNKNOWN;
 333         }
 334         sctp_clog.x.lock.info_lock = rw_wowned(&SCTP_BASE_INFO(ipi_ep_mtx));
 335         if (inp && (inp->sctp_socket)) {
 336                 sctp_clog.x.lock.sock_lock = mtx_owned(&(inp->sctp_socket->so_rcv.sb_mtx));
 337                 sctp_clog.x.lock.sockrcvbuf_lock = mtx_owned(&(inp->sctp_socket->so_rcv.sb_mtx));
 338                 sctp_clog.x.lock.socksndbuf_lock = mtx_owned(&(inp->sctp_socket->so_snd.sb_mtx));
 339         } else {
 340                 sctp_clog.x.lock.sock_lock = SCTP_LOCK_UNKNOWN;
 341                 sctp_clog.x.lock.sockrcvbuf_lock = SCTP_LOCK_UNKNOWN;
 342                 sctp_clog.x.lock.socksndbuf_lock = SCTP_LOCK_UNKNOWN;
 343         }
 344         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 345             SCTP_LOG_LOCK_EVENT,
 346             from,
 347             sctp_clog.x.misc.log1,
 348             sctp_clog.x.misc.log2,
 349             sctp_clog.x.misc.log3,
 350             sctp_clog.x.misc.log4);
 351 }
 352
 353 void
 354 sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *net, int error, int burst, uint8_t from)
 355 {
 356         struct sctp_cwnd_log sctp_clog;
 357
 358         memset(&sctp_clog, 0, sizeof(sctp_clog));
 359         sctp_clog.x.cwnd.net = net;
 360         sctp_clog.x.cwnd.cwnd_new_value = error;
 361         sctp_clog.x.cwnd.inflight = net->flight_size;
 362         sctp_clog.x.cwnd.cwnd_augment = burst;
 363         if (stcb->asoc.send_queue_cnt > 255)
 364                 sctp_clog.x.cwnd.cnt_in_send = 255;
 365         else
 366                 sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
 367         if (stcb->asoc.stream_queue_cnt > 255)
 368                 sctp_clog.x.cwnd.cnt_in_str = 255;
 369         else
 370                 sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
 371         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 372             SCTP_LOG_EVENT_MAXBURST,
 373             from,
 374             sctp_clog.x.misc.log1,
 375             sctp_clog.x.misc.log2,
 376             sctp_clog.x.misc.log3,
 377             sctp_clog.x.misc.log4);
 378 }
 379
 380 void
 381 sctp_log_rwnd(uint8_t from, uint32_t peers_rwnd, uint32_t snd_size, uint32_t overhead)
 382 {
 383         struct sctp_cwnd_log sctp_clog;
 384
 385         sctp_clog.x.rwnd.rwnd = peers_rwnd;
 386         sctp_clog.x.rwnd.send_size = snd_size;
 387         sctp_clog.x.rwnd.overhead = overhead;
 388         sctp_clog.x.rwnd.new_rwnd = 0;
 389         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 390             SCTP_LOG_EVENT_RWND,
 391             from,
 392             sctp_clog.x.misc.log1,
 393             sctp_clog.x.misc.log2,
 394             sctp_clog.x.misc.log3,
 395             sctp_clog.x.misc.log4);
 396 }
 397
 398 void
 399 sctp_log_rwnd_set(uint8_t from, uint32_t peers_rwnd, uint32_t flight_size, uint32_t overhead, uint32_t a_rwndval)
 400 {
 401         struct sctp_cwnd_log sctp_clog;
 402
 403         sctp_clog.x.rwnd.rwnd = peers_rwnd;
 404         sctp_clog.x.rwnd.send_size = flight_size;
 405         sctp_clog.x.rwnd.overhead = overhead;
 406         sctp_clog.x.rwnd.new_rwnd = a_rwndval;
 407         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 408             SCTP_LOG_EVENT_RWND,
 409             from,
 410             sctp_clog.x.misc.log1,
 411             sctp_clog.x.misc.log2,
 412             sctp_clog.x.misc.log3,
 413             sctp_clog.x.misc.log4);
 414 }
 415
 416 void
 417 sctp_log_mbcnt(uint8_t from, uint32_t total_oq, uint32_t book, uint32_t total_mbcnt_q, uint32_t mbcnt)
 418 {
 419         struct sctp_cwnd_log sctp_clog;
 420
 421         sctp_clog.x.mbcnt.total_queue_size = total_oq;
 422         sctp_clog.x.mbcnt.size_change = book;
 423         sctp_clog.x.mbcnt.total_queue_mb_size = total_mbcnt_q;
 424         sctp_clog.x.mbcnt.mbcnt_change = mbcnt;
 425         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 426             SCTP_LOG_EVENT_MBCNT,
 427             from,
 428             sctp_clog.x.misc.log1,
 429             sctp_clog.x.misc.log2,
 430             sctp_clog.x.misc.log3,
 431             sctp_clog.x.misc.log4);
 432 }
 433
 434 void
 435 sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d)
 436 {
 437         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 438             SCTP_LOG_MISC_EVENT,
 439             from,
 440             a, b, c, d);
 441 }
 442
 443 void
 444 sctp_wakeup_log(struct sctp_tcb *stcb, uint32_t wake_cnt, int from)
 445 {
 446         struct sctp_cwnd_log sctp_clog;
 447
 448         sctp_clog.x.wake.stcb = (void *)stcb;
 449         sctp_clog.x.wake.wake_cnt = wake_cnt;
 450         sctp_clog.x.wake.flight = stcb->asoc.total_flight_count;
 451         sctp_clog.x.wake.send_q = stcb->asoc.send_queue_cnt;
 452         sctp_clog.x.wake.sent_q = stcb->asoc.sent_queue_cnt;
 453
 454         if (stcb->asoc.stream_queue_cnt < 0xff)
 455                 sctp_clog.x.wake.stream_qcnt = (uint8_t) stcb->asoc.stream_queue_cnt;
 456         else
 457                 sctp_clog.x.wake.stream_qcnt = 0xff;
 458
 459         if (stcb->asoc.chunks_on_out_queue < 0xff)
 460                 sctp_clog.x.wake.chunks_on_oque = (uint8_t) stcb->asoc.chunks_on_out_queue;
 461         else
 462                 sctp_clog.x.wake.chunks_on_oque = 0xff;
 463
 464         sctp_clog.x.wake.sctpflags = 0;
 465         /* set in the defered mode stuff */
 466         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE)
 467                 sctp_clog.x.wake.sctpflags |= 1;
 468         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT)
 469                 sctp_clog.x.wake.sctpflags |= 2;
 470         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT)
 471                 sctp_clog.x.wake.sctpflags |= 4;
 472         /* what about the sb */
 473         if (stcb->sctp_socket) {
 474                 struct socket *so = stcb->sctp_socket;
 475
 476                 sctp_clog.x.wake.sbflags = (uint8_t) ((so->so_snd.sb_flags & 0x00ff));
 477         } else {
 478                 sctp_clog.x.wake.sbflags = 0xff;
 479         }
 480         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 481             SCTP_LOG_EVENT_WAKE,
 482             from,
 483             sctp_clog.x.misc.log1,
 484             sctp_clog.x.misc.log2,
 485             sctp_clog.x.misc.log3,
 486             sctp_clog.x.misc.log4);
 487 }
 488
 489 void
 490 sctp_log_block(uint8_t from, struct sctp_association *asoc, int sendlen)
 491 {
 492         struct sctp_cwnd_log sctp_clog;
 493
 494         sctp_clog.x.blk.onsb = asoc->total_output_queue_size;
 495         sctp_clog.x.blk.send_sent_qcnt = (uint16_t) (asoc->send_queue_cnt + asoc->sent_queue_cnt);
 496         sctp_clog.x.blk.peer_rwnd = asoc->peers_rwnd;
 497         sctp_clog.x.blk.stream_qcnt = (uint16_t) asoc->stream_queue_cnt;
 498         sctp_clog.x.blk.chunks_on_oque = (uint16_t) asoc->chunks_on_out_queue;
 499         sctp_clog.x.blk.flight_size = (uint16_t) (asoc->total_flight / 1024);
 500         sctp_clog.x.blk.sndlen = sendlen;
 501         SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
 502             SCTP_LOG_EVENT_BLOCK,
 503             from,
 504             sctp_clog.x.misc.log1,
 505             sctp_clog.x.misc.log2,
 506             sctp_clog.x.misc.log3,
 507             sctp_clog.x.misc.log4);
 508 }
 509
 510 int
 511 sctp_fill_stat_log(void *optval SCTP_UNUSED, size_t *optsize SCTP_UNUSED)
 512 {
 513         /* May need to fix this if ktrdump does not work */
 514         return (0);
 515 }
 516
 517 #ifdef SCTP_AUDITING_ENABLED
 518 uint8_t sctp_audit_data[SCTP_AUDIT_SIZE][2];
 519 static int sctp_audit_indx = 0;
 520
 521 static
 522 void
 523 sctp_print_audit_report(void)
 524 {
 525         int i;
 526         int cnt;
 527
 528         cnt = 0;
 529         for (i = sctp_audit_indx; i < SCTP_AUDIT_SIZE; i++) {
 530                 if ((sctp_audit_data[i][0] == 0xe0) &&
 531                     (sctp_audit_data[i][1] == 0x01)) {
 532                         cnt = 0;
 533                         SCTP_PRINTF("\n");
 534                 } else if (sctp_audit_data[i][0] == 0xf0) {
 535                         cnt = 0;
 536                         SCTP_PRINTF("\n");
 537                 } else if ((sctp_audit_data[i][0] == 0xc0) &&
 538                     (sctp_audit_data[i][1] == 0x01)) {
 539                         SCTP_PRINTF("\n");
 540                         cnt = 0;
 541                 }
 542                 SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
 543                     (uint32_t) sctp_audit_data[i][1]);
 544                 cnt++;
 545                 if ((cnt % 14) == 0)
 546                         SCTP_PRINTF("\n");
 547         }
 548         for (i = 0; i < sctp_audit_indx; i++) {
 549                 if ((sctp_audit_data[i][0] == 0xe0) &&
 550                     (sctp_audit_data[i][1] == 0x01)) {
 551                         cnt = 0;
 552                         SCTP_PRINTF("\n");
 553                 } else if (sctp_audit_data[i][0] == 0xf0) {
 554                         cnt = 0;
 555                         SCTP_PRINTF("\n");
 556                 } else if ((sctp_audit_data[i][0] == 0xc0) &&
 557                     (sctp_audit_data[i][1] == 0x01)) {
 558                         SCTP_PRINTF("\n");
 559                         cnt = 0;
 560                 }
 561                 SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
 562                     (uint32_t) sctp_audit_data[i][1]);
 563                 cnt++;
 564                 if ((cnt % 14) == 0)
 565                         SCTP_PRINTF("\n");
 566         }
 567         SCTP_PRINTF("\n");
 568 }
 569
 570 void
 571 sctp_auditing(int from, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
 572     struct sctp_nets *net)
 573 {
 574         int resend_cnt, tot_out, rep, tot_book_cnt;
 575         struct sctp_nets *lnet;
 576         struct sctp_tmit_chunk *chk;
 577
 578         sctp_audit_data[sctp_audit_indx][0] = 0xAA;
 579         sctp_audit_data[sctp_audit_indx][1] = 0x000000ff & from;
 580         sctp_audit_indx++;
 581         if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 582                 sctp_audit_indx = 0;
 583         }
 584         if (inp == NULL) {
 585                 sctp_audit_data[sctp_audit_indx][0] = 0xAF;
 586                 sctp_audit_data[sctp_audit_indx][1] = 0x01;
 587                 sctp_audit_indx++;
 588                 if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 589                         sctp_audit_indx = 0;
 590                 }
 591                 return;
 592         }
 593         if (stcb == NULL) {
 594                 sctp_audit_data[sctp_audit_indx][0] = 0xAF;
 595                 sctp_audit_data[sctp_audit_indx][1] = 0x02;
 596                 sctp_audit_indx++;
 597                 if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 598                         sctp_audit_indx = 0;
 599                 }
 600                 return;
 601         }
 602         sctp_audit_data[sctp_audit_indx][0] = 0xA1;
 603         sctp_audit_data[sctp_audit_indx][1] =
 604             (0x000000ff & stcb->asoc.sent_queue_retran_cnt);
 605         sctp_audit_indx++;
 606         if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 607                 sctp_audit_indx = 0;
 608         }
 609         rep = 0;
 610         tot_book_cnt = 0;
 611         resend_cnt = tot_out = 0;
 612         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
 613                 if (chk->sent == SCTP_DATAGRAM_RESEND) {
 614                         resend_cnt++;
 615                 } else if (chk->sent < SCTP_DATAGRAM_RESEND) {
 616                         tot_out += chk->book_size;
 617                         tot_book_cnt++;
 618                 }
 619         }
 620         if (resend_cnt != stcb->asoc.sent_queue_retran_cnt) {
 621                 sctp_audit_data[sctp_audit_indx][0] = 0xAF;
 622                 sctp_audit_data[sctp_audit_indx][1] = 0xA1;
 623                 sctp_audit_indx++;
 624                 if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 625                         sctp_audit_indx = 0;
 626                 }
 627                 SCTP_PRINTF("resend_cnt:%d asoc-tot:%d\n",
 628                     resend_cnt, stcb->asoc.sent_queue_retran_cnt);
 629                 rep = 1;
 630                 stcb->asoc.sent_queue_retran_cnt = resend_cnt;
 631                 sctp_audit_data[sctp_audit_indx][0] = 0xA2;
 632                 sctp_audit_data[sctp_audit_indx][1] =
 633                     (0x000000ff & stcb->asoc.sent_queue_retran_cnt);
 634                 sctp_audit_indx++;
 635                 if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 636                         sctp_audit_indx = 0;
 637                 }
 638         }
 639         if (tot_out != stcb->asoc.total_flight) {
 640                 sctp_audit_data[sctp_audit_indx][0] = 0xAF;
 641                 sctp_audit_data[sctp_audit_indx][1] = 0xA2;
 642                 sctp_audit_indx++;
 643                 if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 644                         sctp_audit_indx = 0;
 645                 }
 646                 rep = 1;
 647                 SCTP_PRINTF("tot_flt:%d asoc_tot:%d\n", tot_out,
 648                     (int)stcb->asoc.total_flight);
 649                 stcb->asoc.total_flight = tot_out;
 650         }
 651         if (tot_book_cnt != stcb->asoc.total_flight_count) {
 652                 sctp_audit_data[sctp_audit_indx][0] = 0xAF;
 653                 sctp_audit_data[sctp_audit_indx][1] = 0xA5;
 654                 sctp_audit_indx++;
 655                 if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 656                         sctp_audit_indx = 0;
 657                 }
 658                 rep = 1;
 659                 SCTP_PRINTF("tot_flt_book:%d\n", tot_book_cnt);
 660
 661                 stcb->asoc.total_flight_count = tot_book_cnt;
 662         }
 663         tot_out = 0;
 664         TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
 665                 tot_out += lnet->flight_size;
 666         }
 667         if (tot_out != stcb->asoc.total_flight) {
 668                 sctp_audit_data[sctp_audit_indx][0] = 0xAF;
 669                 sctp_audit_data[sctp_audit_indx][1] = 0xA3;
 670                 sctp_audit_indx++;
 671                 if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 672                         sctp_audit_indx = 0;
 673                 }
 674                 rep = 1;
 675                 SCTP_PRINTF("real flight:%d net total was %d\n",
 676                     stcb->asoc.total_flight, tot_out);
 677                 /* now corrective action */
 678                 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
 679
 680                         tot_out = 0;
 681                         TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
 682                                 if ((chk->whoTo == lnet) &&
 683                                     (chk->sent < SCTP_DATAGRAM_RESEND)) {
 684                                         tot_out += chk->book_size;
 685                                 }
 686                         }
 687                         if (lnet->flight_size != tot_out) {
 688                                 SCTP_PRINTF("net:%p flight was %d corrected to %d\n",
 689                                     (void *)lnet, lnet->flight_size,
 690                                     tot_out);
 691                                 lnet->flight_size = tot_out;
 692                         }
 693                 }
 694         }
 695         if (rep) {
 696                 sctp_print_audit_report();
 697         }
 698 }
 699
 700 void
 701 sctp_audit_log(uint8_t ev, uint8_t fd)
 702 {
 703
 704         sctp_audit_data[sctp_audit_indx][0] = ev;
 705         sctp_audit_data[sctp_audit_indx][1] = fd;
 706         sctp_audit_indx++;
 707         if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
 708                 sctp_audit_indx = 0;
 709         }
 710 }
 711
 712 #endif
 713
 714 /*
 715  * sctp_stop_timers_for_shutdown() should be called
 716  * when entering the SHUTDOWN_SENT or SHUTDOWN_ACK_SENT
 717  * state to make sure that all timers are stopped.
 718  */
 719 void
 720 sctp_stop_timers_for_shutdown(struct sctp_tcb *stcb)
 721 {
 722         struct sctp_association *asoc;
 723         struct sctp_nets *net;
 724
 725         asoc = &stcb->asoc;
 726
 727         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 728         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 729         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 730         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 731         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 732         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 733                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 734                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
 735         }
 736 }
 737
 738 /*
 739  * a list of sizes based on typical mtu's, used only if next hop size not
 740  * returned.
 741  */
 742 static uint32_t sctp_mtu_sizes[] = {
 743         68,
 744         296,
 745         508,
 746         512,
 747         544,
 748         576,
 749         1006,
 750         1492,
 751         1500,
 752         1536,
 753         2002,
 754         2048,
 755         4352,
 756         4464,
 757         8166,
 758         17914,
 759         32000,
 760         65535
 761 };
 762
 763 /*
 764  * Return the largest MTU smaller than val. If there is no
 765  * entry, just return val.
 766  */
 767 uint32_t
 768 sctp_get_prev_mtu(uint32_t val)
 769 {
 770         uint32_t i;
 771
 772         if (val <= sctp_mtu_sizes[0]) {
 773                 return (val);
 774         }
 775         for (i = 1; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
 776                 if (val <= sctp_mtu_sizes[i]) {
 777                         break;
 778                 }
 779         }
 780         return (sctp_mtu_sizes[i - 1]);
 781 }
 782
 783 /*
 784  * Return the smallest MTU larger than val. If there is no
 785  * entry, just return val.
 786  */
 787 uint32_t
 788 sctp_get_next_mtu(uint32_t val)
 789 {
 790         /* select another MTU that is just bigger than this one */
 791         uint32_t i;
 792
 793         for (i = 0; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
 794                 if (val < sctp_mtu_sizes[i]) {
 795                         return (sctp_mtu_sizes[i]);
 796                 }
 797         }
 798         return (val);
 799 }
 800
 801 void
 802 sctp_fill_random_store(struct sctp_pcb *m)
 803 {
 804         /*
 805          * Here we use the MD5/SHA-1 to hash with our good randomNumbers and
 806          * our counter. The result becomes our good random numbers and we
 807          * then setup to give these out. Note that we do no locking to
 808          * protect this. This is ok, since if competing folks call this we
 809          * will get more gobbled gook in the random store which is what we
 810          * want. There is a danger that two guys will use the same random
 811          * numbers, but thats ok too since that is random as well :->
 812          */
 813         m->store_at = 0;
 814         (void)sctp_hmac(SCTP_HMAC, (uint8_t *) m->random_numbers,
 815             sizeof(m->random_numbers), (uint8_t *) & m->random_counter,
 816             sizeof(m->random_counter), (uint8_t *) m->random_store);
 817         m->random_counter++;
 818 }
 819
 820 uint32_t
 821 sctp_select_initial_TSN(struct sctp_pcb *inp)
 822 {
 823         /*
 824          * A true implementation should use random selection process to get
 825          * the initial stream sequence number, using RFC1750 as a good
 826          * guideline
 827          */
 828         uint32_t x, *xp;
 829         uint8_t *p;
 830         int store_at, new_store;
 831
 832         if (inp->initial_sequence_debug != 0) {
 833                 uint32_t ret;
 834
 835                 ret = inp->initial_sequence_debug;
 836                 inp->initial_sequence_debug++;
 837                 return (ret);
 838         }
 839 retry:
 840         store_at = inp->store_at;
 841         new_store = store_at + sizeof(uint32_t);
 842         if (new_store >= (SCTP_SIGNATURE_SIZE - 3)) {
 843                 new_store = 0;
 844         }
 845         if (!atomic_cmpset_int(&inp->store_at, store_at, new_store)) {
 846                 goto retry;
 847         }
 848         if (new_store == 0) {
 849                 /* Refill the random store */
 850                 sctp_fill_random_store(inp);
 851         }
 852         p = &inp->random_store[store_at];
 853         xp = (uint32_t *) p;
 854         x = *xp;
 855         return (x);
 856 }
 857
 858 uint32_t
 859 sctp_select_a_tag(struct sctp_inpcb *inp, uint16_t lport, uint16_t rport, int check)
 860 {
 861         uint32_t x;
 862         struct timeval now;
 863
 864         if (check) {
 865                 (void)SCTP_GETTIME_TIMEVAL(&now);
 866         }
 867         for (;;) {
 868                 x = sctp_select_initial_TSN(&inp->sctp_ep);
 869                 if (x == 0) {
 870                         /* we never use 0 */
 871                         continue;
 872                 }
 873                 if (!check || sctp_is_vtag_good(x, lport, rport, &now)) {
 874                         break;
 875                 }
 876         }
 877         return (x);
 878 }
 879
 880 int
 881 sctp_init_asoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
 882     uint32_t override_tag, uint32_t vrf_id)
 883 {
 884         struct sctp_association *asoc;
 885
 886         /*
 887          * Anything set to zero is taken care of by the allocation routine's
 888          * bzero
 889          */
 890
 891         /*
 892          * Up front select what scoping to apply on addresses I tell my peer
 893          * Not sure what to do with these right now, we will need to come up
 894          * with a way to set them. We may need to pass them through from the
 895          * caller in the sctp_aloc_assoc() function.
 896          */
 897         int i;
 898
 899 #if defined(SCTP_DETAILED_STR_STATS)
 900         int j;
 901
 902 #endif
 903
 904         asoc = &stcb->asoc;
 905         /* init all variables to a known value. */
 906         SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_INUSE);
 907         asoc->max_burst = inp->sctp_ep.max_burst;
 908         asoc->fr_max_burst = inp->sctp_ep.fr_max_burst;
 909         asoc->heart_beat_delay = TICKS_TO_MSEC(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT]);
 910         asoc->cookie_life = inp->sctp_ep.def_cookie_life;
 911         asoc->sctp_cmt_on_off = inp->sctp_cmt_on_off;
 912         asoc->ecn_supported = inp->ecn_supported;
 913         asoc->prsctp_supported = inp->prsctp_supported;
 914         asoc->auth_supported = inp->auth_supported;
 915         asoc->asconf_supported = inp->asconf_supported;
 916         asoc->reconfig_supported = inp->reconfig_supported;
 917         asoc->nrsack_supported = inp->nrsack_supported;
 918         asoc->pktdrop_supported = inp->pktdrop_supported;
 919         asoc->sctp_cmt_pf = (uint8_t) 0;
 920         asoc->sctp_frag_point = inp->sctp_frag_point;
 921         asoc->sctp_features = inp->sctp_features;
 922         asoc->default_dscp = inp->sctp_ep.default_dscp;
 923 #ifdef INET6
 924         if (inp->sctp_ep.default_flowlabel) {
 925                 asoc->default_flowlabel = inp->sctp_ep.default_flowlabel;
 926         } else {
 927                 if (inp->ip_inp.inp.inp_flags & IN6P_AUTOFLOWLABEL) {
 928                         asoc->default_flowlabel = sctp_select_initial_TSN(&inp->sctp_ep);
 929                         asoc->default_flowlabel &= 0x000fffff;
 930                         asoc->default_flowlabel |= 0x80000000;
 931                 } else {
 932                         asoc->default_flowlabel = 0;
 933                 }
 934         }
 935 #endif
 936         asoc->sb_send_resv = 0;
 937         if (override_tag) {
 938                 asoc->my_vtag = override_tag;
 939         } else {
 940                 asoc->my_vtag = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
 941         }
 942         /* Get the nonce tags */
 943         asoc->my_vtag_nonce = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 0);
 944         asoc->peer_vtag_nonce = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 0);
 945         asoc->vrf_id = vrf_id;
 946
 947 #ifdef SCTP_ASOCLOG_OF_TSNS
 948         asoc->tsn_in_at = 0;
 949         asoc->tsn_out_at = 0;
 950         asoc->tsn_in_wrapped = 0;
 951         asoc->tsn_out_wrapped = 0;
 952         asoc->cumack_log_at = 0;
 953         asoc->cumack_log_atsnt = 0;
 954 #endif
 955 #ifdef SCTP_FS_SPEC_LOG
 956         asoc->fs_index = 0;
 957 #endif
 958         asoc->refcnt = 0;
 959         asoc->assoc_up_sent = 0;
 960         asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number = asoc->sending_seq =
 961             sctp_select_initial_TSN(&inp->sctp_ep);
 962         asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
 963         /* we are optimisitic here */
 964         asoc->peer_supports_nat = 0;
 965         asoc->sent_queue_retran_cnt = 0;
 966
 967         /* for CMT */
 968         asoc->last_net_cmt_send_started = NULL;
 969
 970         /* This will need to be adjusted */
 971         asoc->last_acked_seq = asoc->init_seq_number - 1;
 972         asoc->advanced_peer_ack_point = asoc->last_acked_seq;
 973         asoc->asconf_seq_in = asoc->last_acked_seq;
 974
 975         /* here we are different, we hold the next one we expect */
 976         asoc->str_reset_seq_in = asoc->last_acked_seq + 1;
 977
 978         asoc->initial_init_rto_max = inp->sctp_ep.initial_init_rto_max;
 979         asoc->initial_rto = inp->sctp_ep.initial_rto;
 980
 981         asoc->max_init_times = inp->sctp_ep.max_init_times;
 982         asoc->max_send_times = inp->sctp_ep.max_send_times;
 983         asoc->def_net_failure = inp->sctp_ep.def_net_failure;
 984         asoc->def_net_pf_threshold = inp->sctp_ep.def_net_pf_threshold;
 985         asoc->free_chunk_cnt = 0;
 986
 987         asoc->iam_blocking = 0;
 988         asoc->context = inp->sctp_context;
 989         asoc->local_strreset_support = inp->local_strreset_support;
 990         asoc->def_send = inp->def_send;
 991         asoc->delayed_ack = TICKS_TO_MSEC(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_RECV]);
 992         asoc->sack_freq = inp->sctp_ep.sctp_sack_freq;
 993         asoc->pr_sctp_cnt = 0;
 994         asoc->total_output_queue_size = 0;
 995
 996         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 997                 asoc->scope.ipv6_addr_legal = 1;
 998                 if (SCTP_IPV6_V6ONLY(inp) == 0) {
 999                         asoc->scope.ipv4_addr_legal = 1;
1000                 } else {
1001                         asoc->scope.ipv4_addr_legal = 0;
1002                 }
1003         } else {
1004                 asoc->scope.ipv6_addr_legal = 0;
1005                 asoc->scope.ipv4_addr_legal = 1;
1006         }
1007
1008         asoc->my_rwnd = max(SCTP_SB_LIMIT_RCV(inp->sctp_socket), SCTP_MINIMAL_RWND);
1009         asoc->peers_rwnd = SCTP_SB_LIMIT_RCV(inp->sctp_socket);
1010
1011         asoc->smallest_mtu = inp->sctp_frag_point;
1012         asoc->minrto = inp->sctp_ep.sctp_minrto;
1013         asoc->maxrto = inp->sctp_ep.sctp_maxrto;
1014
1015         asoc->locked_on_sending = NULL;
1016         asoc->stream_locked_on = 0;
1017         asoc->ecn_echo_cnt_onq = 0;
1018         asoc->stream_locked = 0;
1019
1020         asoc->send_sack = 1;
1021
1022         LIST_INIT(&asoc->sctp_restricted_addrs);
1023
1024         TAILQ_INIT(&asoc->nets);
1025         TAILQ_INIT(&asoc->pending_reply_queue);
1026         TAILQ_INIT(&asoc->asconf_ack_sent);
1027         /* Setup to fill the hb random cache at first HB */
1028         asoc->hb_random_idx = 4;
1029
1030         asoc->sctp_autoclose_ticks = inp->sctp_ep.auto_close_time;
1031
1032         stcb->asoc.congestion_control_module = inp->sctp_ep.sctp_default_cc_module;
1033         stcb->asoc.cc_functions = sctp_cc_functions[inp->sctp_ep.sctp_default_cc_module];
1034
1035         stcb->asoc.stream_scheduling_module = inp->sctp_ep.sctp_default_ss_module;
1036         stcb->asoc.ss_functions = sctp_ss_functions[inp->sctp_ep.sctp_default_ss_module];
1037
1038         /*
1039          * Now the stream parameters, here we allocate space for all streams
1040          * that we request by default.
1041          */
1042         asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams =
1043             inp->sctp_ep.pre_open_stream_count;
1044         SCTP_MALLOC(asoc->strmout, struct sctp_stream_out *,
1045             asoc->streamoutcnt * sizeof(struct sctp_stream_out),
1046             SCTP_M_STRMO);
1047         if (asoc->strmout == NULL) {
1048                 /* big trouble no memory */
1049                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
1050                 return (ENOMEM);
1051         }
1052         for (i = 0; i < asoc->streamoutcnt; i++) {
1053                 /*
1054                  * inbound side must be set to 0xffff, also NOTE when we get
1055                  * the INIT-ACK back (for INIT sender) we MUST reduce the
1056                  * count (streamoutcnt) but first check if we sent to any of
1057                  * the upper streams that were dropped (if some were). Those
1058                  * that were dropped must be notified to the upper layer as
1059                  * failed to send.
1060                  */
1061                 asoc->strmout[i].next_sequence_send = 0x0;
1062                 TAILQ_INIT(&asoc->strmout[i].outqueue);
1063                 asoc->strmout[i].chunks_on_queues = 0;
1064 #if defined(SCTP_DETAILED_STR_STATS)
1065                 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1066                         asoc->strmout[i].abandoned_sent[j] = 0;
1067                         asoc->strmout[i].abandoned_unsent[j] = 0;
1068                 }
1069 #else
1070                 asoc->strmout[i].abandoned_sent[0] = 0;
1071                 asoc->strmout[i].abandoned_unsent[0] = 0;
1072 #endif
1073                 asoc->strmout[i].stream_no = i;
1074                 asoc->strmout[i].last_msg_incomplete = 0;
1075                 asoc->ss_functions.sctp_ss_init_stream(&asoc->strmout[i], NULL);
1076         }
1077         asoc->ss_functions.sctp_ss_init(stcb, asoc, 0);
1078
1079         /* Now the mapping array */
1080         asoc->mapping_array_size = SCTP_INITIAL_MAPPING_ARRAY;
1081         SCTP_MALLOC(asoc->mapping_array, uint8_t *, asoc->mapping_array_size,
1082             SCTP_M_MAP);
1083         if (asoc->mapping_array == NULL) {
1084                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
1085                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
1086                 return (ENOMEM);
1087         }
1088         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
1089         SCTP_MALLOC(asoc->nr_mapping_array, uint8_t *, asoc->mapping_array_size,
1090             SCTP_M_MAP);
1091         if (asoc->nr_mapping_array == NULL) {
1092                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
1093                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
1094                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
1095                 return (ENOMEM);
1096         }
1097         memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
1098
1099         /* Now the init of the other outqueues */
1100         TAILQ_INIT(&asoc->free_chunks);
1101         TAILQ_INIT(&asoc->control_send_queue);
1102         TAILQ_INIT(&asoc->asconf_send_queue);
1103         TAILQ_INIT(&asoc->send_queue);
1104         TAILQ_INIT(&asoc->sent_queue);
1105         TAILQ_INIT(&asoc->reasmqueue);
1106         TAILQ_INIT(&asoc->resetHead);
1107         asoc->max_inbound_streams = inp->sctp_ep.max_open_streams_intome;
1108         TAILQ_INIT(&asoc->asconf_queue);
1109         /* authentication fields */
1110         asoc->authinfo.random = NULL;
1111         asoc->authinfo.active_keyid = 0;
1112         asoc->authinfo.assoc_key = NULL;
1113         asoc->authinfo.assoc_keyid = 0;
1114         asoc->authinfo.recv_key = NULL;
1115         asoc->authinfo.recv_keyid = 0;
1116         LIST_INIT(&asoc->shared_keys);
1117         asoc->marked_retrans = 0;
1118         asoc->port = inp->sctp_ep.port;
1119         asoc->timoinit = 0;
1120         asoc->timodata = 0;
1121         asoc->timosack = 0;
1122         asoc->timoshutdown = 0;
1123         asoc->timoheartbeat = 0;
1124         asoc->timocookie = 0;
1125         asoc->timoshutdownack = 0;
1126         (void)SCTP_GETTIME_TIMEVAL(&asoc->start_time);
1127         asoc->discontinuity_time = asoc->start_time;
1128         for (i = 0; i < SCTP_PR_SCTP_MAX + 1; i++) {
1129                 asoc->abandoned_unsent[i] = 0;
1130                 asoc->abandoned_sent[i] = 0;
1131         }
1132         /*
1133          * sa_ignore MEMLEAK {memory is put in the assoc mapping array and
1134          * freed later when the association is freed.
1135          */
1136         return (0);
1137 }
1138
1139 void
1140 sctp_print_mapping_array(struct sctp_association *asoc)
1141 {
1142         unsigned int i, limit;
1143
1144         SCTP_PRINTF("Mapping array size: %d, baseTSN: %8.8x, cumAck: %8.8x, highestTSN: (%8.8x, %8.8x).\n",
1145             asoc->mapping_array_size,
1146             asoc->mapping_array_base_tsn,
1147             asoc->cumulative_tsn,
1148             asoc->highest_tsn_inside_map,
1149             asoc->highest_tsn_inside_nr_map);
1150         for (limit = asoc->mapping_array_size; limit > 1; limit--) {
1151                 if (asoc->mapping_array[limit - 1] != 0) {
1152                         break;
1153                 }
1154         }
1155         SCTP_PRINTF("Renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit);
1156         for (i = 0; i < limit; i++) {
1157                 SCTP_PRINTF("%2.2x%c", asoc->mapping_array[i], ((i + 1) % 16) ? ' ' : '\n');
1158         }
1159         if (limit % 16)
1160                 SCTP_PRINTF("\n");
1161         for (limit = asoc->mapping_array_size; limit > 1; limit--) {
1162                 if (asoc->nr_mapping_array[limit - 1]) {
1163                         break;
1164                 }
1165         }
1166         SCTP_PRINTF("Non renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit);
1167         for (i = 0; i < limit; i++) {
1168                 SCTP_PRINTF("%2.2x%c", asoc->nr_mapping_array[i], ((i + 1) % 16) ? ' ' : '\n');
1169         }
1170         if (limit % 16)
1171                 SCTP_PRINTF("\n");
1172 }
1173
1174 int
1175 sctp_expand_mapping_array(struct sctp_association *asoc, uint32_t needed)
1176 {
1177         /* mapping array needs to grow */
1178         uint8_t *new_array1, *new_array2;
1179         uint32_t new_size;
1180
1181         new_size = asoc->mapping_array_size + ((needed + 7) / 8 + SCTP_MAPPING_ARRAY_INCR);
1182         SCTP_MALLOC(new_array1, uint8_t *, new_size, SCTP_M_MAP);
1183         SCTP_MALLOC(new_array2, uint8_t *, new_size, SCTP_M_MAP);
1184         if ((new_array1 == NULL) || (new_array2 == NULL)) {
1185                 /* can't get more, forget it */
1186                 SCTP_PRINTF("No memory for expansion of SCTP mapping array %d\n", new_size);
1187                 if (new_array1) {
1188                         SCTP_FREE(new_array1, SCTP_M_MAP);
1189                 }
1190                 if (new_array2) {
1191                         SCTP_FREE(new_array2, SCTP_M_MAP);
1192                 }
1193                 return (-1);
1194         }
1195         memset(new_array1, 0, new_size);
1196         memset(new_array2, 0, new_size);
1197         memcpy(new_array1, asoc->mapping_array, asoc->mapping_array_size);
1198         memcpy(new_array2, asoc->nr_mapping_array, asoc->mapping_array_size);
1199         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
1200         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
1201         asoc->mapping_array = new_array1;
1202         asoc->nr_mapping_array = new_array2;
1203         asoc->mapping_array_size = new_size;
1204         return (0);
1205 }
1206
1207
1208 static void
1209 sctp_iterator_work(struct sctp_iterator *it)
1210 {
1211         int iteration_count = 0;
1212         int inp_skip = 0;
1213         int first_in = 1;
1214         struct sctp_inpcb *tinp;
1215
1216         SCTP_INP_INFO_RLOCK();
1217         SCTP_ITERATOR_LOCK();
1218         if (it->inp) {
1219                 SCTP_INP_RLOCK(it->inp);
1220                 SCTP_INP_DECR_REF(it->inp);
1221         }
1222         if (it->inp == NULL) {
1223                 /* iterator is complete */
1224 done_with_iterator:
1225                 SCTP_ITERATOR_UNLOCK();
1226                 SCTP_INP_INFO_RUNLOCK();
1227                 if (it->function_atend != NULL) {
1228                         (*it->function_atend) (it->pointer, it->val);
1229                 }
1230                 SCTP_FREE(it, SCTP_M_ITER);
1231                 return;
1232         }
1233 select_a_new_ep:
1234         if (first_in) {
1235                 first_in = 0;
1236         } else {
1237                 SCTP_INP_RLOCK(it->inp);
1238         }
1239         while (((it->pcb_flags) &&
1240             ((it->inp->sctp_flags & it->pcb_flags) != it->pcb_flags)) ||
1241             ((it->pcb_features) &&
1242             ((it->inp->sctp_features & it->pcb_features) != it->pcb_features))) {
1243                 /* endpoint flags or features don't match, so keep looking */
1244                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
1245                         SCTP_INP_RUNLOCK(it->inp);
1246                         goto done_with_iterator;
1247                 }
1248                 tinp = it->inp;
1249                 it->inp = LIST_NEXT(it->inp, sctp_list);
1250                 SCTP_INP_RUNLOCK(tinp);
1251                 if (it->inp == NULL) {
1252                         goto done_with_iterator;
1253                 }
1254                 SCTP_INP_RLOCK(it->inp);
1255         }
1256         /* now go through each assoc which is in the desired state */
1257         if (it->done_current_ep == 0) {
1258                 if (it->function_inp != NULL)
1259                         inp_skip = (*it->function_inp) (it->inp, it->pointer, it->val);
1260                 it->done_current_ep = 1;
1261         }
1262         if (it->stcb == NULL) {
1263                 /* run the per instance function */
1264                 it->stcb = LIST_FIRST(&it->inp->sctp_asoc_list);
1265         }
1266         if ((inp_skip) || it->stcb == NULL) {
1267                 if (it->function_inp_end != NULL) {
1268                         inp_skip = (*it->function_inp_end) (it->inp,
1269                             it->pointer,
1270                             it->val);
1271                 }
1272                 SCTP_INP_RUNLOCK(it->inp);
1273                 goto no_stcb;
1274         }
1275         while (it->stcb) {
1276                 SCTP_TCB_LOCK(it->stcb);
1277                 if (it->asoc_state && ((it->stcb->asoc.state & it->asoc_state) != it->asoc_state)) {
1278                         /* not in the right state... keep looking */
1279                         SCTP_TCB_UNLOCK(it->stcb);
1280                         goto next_assoc;
1281                 }
1282                 /* see if we have limited out the iterator loop */
1283                 iteration_count++;
1284                 if (iteration_count > SCTP_ITERATOR_MAX_AT_ONCE) {
1285                         /* Pause to let others grab the lock */
1286                         atomic_add_int(&it->stcb->asoc.refcnt, 1);
1287                         SCTP_TCB_UNLOCK(it->stcb);
1288                         SCTP_INP_INCR_REF(it->inp);
1289                         SCTP_INP_RUNLOCK(it->inp);
1290                         SCTP_ITERATOR_UNLOCK();
1291                         SCTP_INP_INFO_RUNLOCK();
1292                         SCTP_INP_INFO_RLOCK();
1293                         SCTP_ITERATOR_LOCK();
1294                         if (sctp_it_ctl.iterator_flags) {
1295                                 /* We won't be staying here */
1296                                 SCTP_INP_DECR_REF(it->inp);
1297                                 atomic_add_int(&it->stcb->asoc.refcnt, -1);
1298                                 if (sctp_it_ctl.iterator_flags &
1299                                     SCTP_ITERATOR_STOP_CUR_IT) {
1300                                         sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_IT;
1301                                         goto done_with_iterator;
1302                                 }
1303                                 if (sctp_it_ctl.iterator_flags &
1304                                     SCTP_ITERATOR_STOP_CUR_INP) {
1305                                         sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_INP;
1306                                         goto no_stcb;
1307                                 }
1308                                 /* If we reach here huh? */
1309                                 SCTP_PRINTF("Unknown it ctl flag %x\n",
1310                                     sctp_it_ctl.iterator_flags);
1311                                 sctp_it_ctl.iterator_flags = 0;
1312                         }
1313                         SCTP_INP_RLOCK(it->inp);
1314                         SCTP_INP_DECR_REF(it->inp);
1315                         SCTP_TCB_LOCK(it->stcb);
1316                         atomic_add_int(&it->stcb->asoc.refcnt, -1);
1317                         iteration_count = 0;
1318                 }
1319                 /* run function on this one */
1320                 (*it->function_assoc) (it->inp, it->stcb, it->pointer, it->val);
1321
1322                 /*
1323                  * we lie here, it really needs to have its own type but
1324                  * first I must verify that this won't effect things :-0
1325                  */
1326                 if (it->no_chunk_output == 0)
1327                         sctp_chunk_output(it->inp, it->stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1328
1329                 SCTP_TCB_UNLOCK(it->stcb);
1330 next_assoc:
1331                 it->stcb = LIST_NEXT(it->stcb, sctp_tcblist);
1332                 if (it->stcb == NULL) {
1333                         /* Run last function */
1334                         if (it->function_inp_end != NULL) {
1335                                 inp_skip = (*it->function_inp_end) (it->inp,
1336                                     it->pointer,
1337                                     it->val);
1338                         }
1339                 }
1340         }
1341         SCTP_INP_RUNLOCK(it->inp);
1342 no_stcb:
1343         /* done with all assocs on this endpoint, move on to next endpoint */
1344         it->done_current_ep = 0;
1345         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
1346                 it->inp = NULL;
1347         } else {
1348                 it->inp = LIST_NEXT(it->inp, sctp_list);
1349         }
1350         if (it->inp == NULL) {
1351                 goto done_with_iterator;
1352         }
1353         goto select_a_new_ep;
1354 }
1355
1356 void
1357 sctp_iterator_worker(void)
1358 {
1359         struct sctp_iterator *it, *nit;
1360
1361         /* This function is called with the WQ lock in place */
1362
1363         sctp_it_ctl.iterator_running = 1;
1364         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
1365                 sctp_it_ctl.cur_it = it;
1366                 /* now lets work on this one */
1367                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
1368                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
1369                 CURVNET_SET(it->vn);
1370                 sctp_iterator_work(it);
1371                 sctp_it_ctl.cur_it = NULL;
1372                 CURVNET_RESTORE();
1373                 SCTP_IPI_ITERATOR_WQ_LOCK();
1374                 /* sa_ignore FREED_MEMORY */
1375         }
1376         sctp_it_ctl.iterator_running = 0;
1377         return;
1378 }
1379
1380
1381 static void
1382 sctp_handle_addr_wq(void)
1383 {
1384         /* deal with the ADDR wq from the rtsock calls */
1385         struct sctp_laddr *wi, *nwi;
1386         struct sctp_asconf_iterator *asc;
1387
1388         SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
1389             sizeof(struct sctp_asconf_iterator), SCTP_M_ASC_IT);
1390         if (asc == NULL) {
1391                 /* Try later, no memory */
1392                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
1393                     (struct sctp_inpcb *)NULL,
1394                     (struct sctp_tcb *)NULL,
1395                     (struct sctp_nets *)NULL);
1396                 return;
1397         }
1398         LIST_INIT(&asc->list_of_work);
1399         asc->cnt = 0;
1400
1401         SCTP_WQ_ADDR_LOCK();
1402         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
1403                 LIST_REMOVE(wi, sctp_nxt_addr);
1404                 LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
1405                 asc->cnt++;
1406         }
1407         SCTP_WQ_ADDR_UNLOCK();
1408
1409         if (asc->cnt == 0) {
1410                 SCTP_FREE(asc, SCTP_M_ASC_IT);
1411         } else {
1412                 (void)sctp_initiate_iterator(sctp_asconf_iterator_ep,
1413                     sctp_asconf_iterator_stcb,
1414                     NULL,       /* No ep end for boundall */
1415                     SCTP_PCB_FLAGS_BOUNDALL,
1416                     SCTP_PCB_ANY_FEATURES,
1417                     SCTP_ASOC_ANY_STATE,
1418                     (void *)asc, 0,
1419                     sctp_asconf_iterator_end, NULL, 0);
1420         }
1421 }
1422
1423 void
1424 sctp_timeout_handler(void *t)
1425 {
1426         struct sctp_inpcb *inp;
1427         struct sctp_tcb *stcb;
1428         struct sctp_nets *net;
1429         struct sctp_timer *tmr;
1430
1431 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1432         struct socket *so;
1433
1434 #endif
1435         int did_output, type;
1436
1437         tmr = (struct sctp_timer *)t;
1438         inp = (struct sctp_inpcb *)tmr->ep;
1439         stcb = (struct sctp_tcb *)tmr->tcb;
1440         net = (struct sctp_nets *)tmr->net;
1441         CURVNET_SET((struct vnet *)tmr->vnet);
1442         did_output = 1;
1443
1444 #ifdef SCTP_AUDITING_ENABLED
1445         sctp_audit_log(0xF0, (uint8_t) tmr->type);
1446         sctp_auditing(3, inp, stcb, net);
1447 #endif
1448
1449         /* sanity checks... */
1450         if (tmr->self != (void *)tmr) {
1451                 /*
1452                  * SCTP_PRINTF("Stale SCTP timer fired (%p), ignoring...\n",
1453                  * (void *)tmr);
1454                  */
1455                 CURVNET_RESTORE();
1456                 return;
1457         }
1458         tmr->stopped_from = 0xa001;
1459         if (!SCTP_IS_TIMER_TYPE_VALID(tmr->type)) {
1460                 /*
1461                  * SCTP_PRINTF("SCTP timer fired with invalid type: 0x%x\n",
1462                  * tmr->type);
1463                  */
1464                 CURVNET_RESTORE();
1465                 return;
1466         }
1467         tmr->stopped_from = 0xa002;
1468         if ((tmr->type != SCTP_TIMER_TYPE_ADDR_WQ) && (inp == NULL)) {
1469                 CURVNET_RESTORE();
1470                 return;
1471         }
1472         /* if this is an iterator timeout, get the struct and clear inp */
1473         tmr->stopped_from = 0xa003;
1474         type = tmr->type;
1475         if (inp) {
1476                 SCTP_INP_INCR_REF(inp);
1477                 if ((inp->sctp_socket == NULL) &&
1478                     ((tmr->type != SCTP_TIMER_TYPE_INPKILL) &&
1479                     (tmr->type != SCTP_TIMER_TYPE_INIT) &&
1480                     (tmr->type != SCTP_TIMER_TYPE_SEND) &&
1481                     (tmr->type != SCTP_TIMER_TYPE_RECV) &&
1482                     (tmr->type != SCTP_TIMER_TYPE_HEARTBEAT) &&
1483                     (tmr->type != SCTP_TIMER_TYPE_SHUTDOWN) &&
1484                     (tmr->type != SCTP_TIMER_TYPE_SHUTDOWNACK) &&
1485                     (tmr->type != SCTP_TIMER_TYPE_SHUTDOWNGUARD) &&
1486                     (tmr->type != SCTP_TIMER_TYPE_ASOCKILL))
1487                     ) {
1488                         SCTP_INP_DECR_REF(inp);
1489                         CURVNET_RESTORE();
1490                         return;
1491                 }
1492         }
1493         tmr->stopped_from = 0xa004;
1494         if (stcb) {
1495                 atomic_add_int(&stcb->asoc.refcnt, 1);
1496                 if (stcb->asoc.state == 0) {
1497                         atomic_add_int(&stcb->asoc.refcnt, -1);
1498                         if (inp) {
1499                                 SCTP_INP_DECR_REF(inp);
1500                         }
1501                         CURVNET_RESTORE();
1502                         return;
1503                 }
1504         }
1505         tmr->stopped_from = 0xa005;
1506         SCTPDBG(SCTP_DEBUG_TIMER1, "Timer type %d goes off\n", tmr->type);
1507         if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
1508                 if (inp) {
1509                         SCTP_INP_DECR_REF(inp);
1510                 }
1511                 if (stcb) {
1512                         atomic_add_int(&stcb->asoc.refcnt, -1);
1513                 }
1514                 CURVNET_RESTORE();
1515                 return;
1516         }
1517         tmr->stopped_from = 0xa006;
1518
1519         if (stcb) {
1520                 SCTP_TCB_LOCK(stcb);
1521                 atomic_add_int(&stcb->asoc.refcnt, -1);
1522                 if ((tmr->type != SCTP_TIMER_TYPE_ASOCKILL) &&
1523                     ((stcb->asoc.state == 0) ||
1524                     (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED))) {
1525                         SCTP_TCB_UNLOCK(stcb);
1526                         if (inp) {
1527                                 SCTP_INP_DECR_REF(inp);
1528                         }
1529                         CURVNET_RESTORE();
1530                         return;
1531                 }
1532         }
1533         /* record in stopped what t-o occured */
1534         tmr->stopped_from = tmr->type;
1535
1536         /* mark as being serviced now */
1537         if (SCTP_OS_TIMER_PENDING(&tmr->timer)) {
1538                 /*
1539                  * Callout has been rescheduled.
1540                  */
1541                 goto get_out;
1542         }
1543         if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
1544                 /*
1545                  * Not active, so no action.
1546                  */
1547                 goto get_out;
1548         }
1549         SCTP_OS_TIMER_DEACTIVATE(&tmr->timer);
1550
1551         /* call the handler for the appropriate timer type */
1552         switch (tmr->type) {
1553         case SCTP_TIMER_TYPE_ZERO_COPY:
1554                 if (inp == NULL) {
1555                         break;
1556                 }
1557                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE)) {
1558                         SCTP_ZERO_COPY_EVENT(inp, inp->sctp_socket);
1559                 }
1560                 break;
1561         case SCTP_TIMER_TYPE_ZCOPY_SENDQ:
1562                 if (inp == NULL) {
1563                         break;
1564                 }
1565                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE)) {
1566                         SCTP_ZERO_COPY_SENDQ_EVENT(inp, inp->sctp_socket);
1567                 }
1568                 break;
1569         case SCTP_TIMER_TYPE_ADDR_WQ:
1570                 sctp_handle_addr_wq();
1571                 break;
1572         case SCTP_TIMER_TYPE_SEND:
1573                 if ((stcb == NULL) || (inp == NULL)) {
1574                         break;
1575                 }
1576                 SCTP_STAT_INCR(sctps_timodata);
1577                 stcb->asoc.timodata++;
1578                 stcb->asoc.num_send_timers_up--;
1579                 if (stcb->asoc.num_send_timers_up < 0) {
1580                         stcb->asoc.num_send_timers_up = 0;
1581                 }
1582                 SCTP_TCB_LOCK_ASSERT(stcb);
1583                 if (sctp_t3rxt_timer(inp, stcb, net)) {
1584                         /* no need to unlock on tcb its gone */
1585
1586                         goto out_decr;
1587                 }
1588                 SCTP_TCB_LOCK_ASSERT(stcb);
1589 #ifdef SCTP_AUDITING_ENABLED
1590                 sctp_auditing(4, inp, stcb, net);
1591 #endif
1592                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1593                 if ((stcb->asoc.num_send_timers_up == 0) &&
1594                     (stcb->asoc.sent_queue_cnt > 0)) {
1595                         struct sctp_tmit_chunk *chk;
1596
1597                         /*
1598                          * safeguard. If there on some on the sent queue
1599                          * somewhere but no timers running something is
1600                          * wrong... so we start a timer on the first chunk
1601                          * on the send queue on whatever net it is sent to.
1602                          */
1603                         chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
1604                         sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb,
1605                             chk->whoTo);
1606                 }
1607                 break;
1608         case SCTP_TIMER_TYPE_INIT:
1609                 if ((stcb == NULL) || (inp == NULL)) {
1610                         break;
1611                 }
1612                 SCTP_STAT_INCR(sctps_timoinit);
1613                 stcb->asoc.timoinit++;
1614                 if (sctp_t1init_timer(inp, stcb, net)) {
1615                         /* no need to unlock on tcb its gone */
1616                         goto out_decr;
1617                 }
1618                 /* We do output but not here */
1619                 did_output = 0;
1620                 break;
1621         case SCTP_TIMER_TYPE_RECV:
1622                 if ((stcb == NULL) || (inp == NULL)) {
1623                         break;
1624                 }
1625                 SCTP_STAT_INCR(sctps_timosack);
1626                 stcb->asoc.timosack++;
1627                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
1628 #ifdef SCTP_AUDITING_ENABLED
1629                 sctp_auditing(4, inp, stcb, net);
1630 #endif
1631                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SACK_TMR, SCTP_SO_NOT_LOCKED);
1632                 break;
1633         case SCTP_TIMER_TYPE_SHUTDOWN:
1634                 if ((stcb == NULL) || (inp == NULL)) {
1635                         break;
1636                 }
1637                 if (sctp_shutdown_timer(inp, stcb, net)) {
1638                         /* no need to unlock on tcb its gone */
1639                         goto out_decr;
1640                 }
1641                 SCTP_STAT_INCR(sctps_timoshutdown);
1642                 stcb->asoc.timoshutdown++;
1643 #ifdef SCTP_AUDITING_ENABLED
1644                 sctp_auditing(4, inp, stcb, net);
1645 #endif
1646                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_NOT_LOCKED);
1647                 break;
1648         case SCTP_TIMER_TYPE_HEARTBEAT:
1649                 if ((stcb == NULL) || (inp == NULL) || (net == NULL)) {
1650                         break;
1651                 }
1652                 SCTP_STAT_INCR(sctps_timoheartbeat);
1653                 stcb->asoc.timoheartbeat++;
1654                 if (sctp_heartbeat_timer(inp, stcb, net)) {
1655                         /* no need to unlock on tcb its gone */
1656                         goto out_decr;
1657                 }
1658 #ifdef SCTP_AUDITING_ENABLED
1659                 sctp_auditing(4, inp, stcb, net);
1660 #endif
1661                 if (!(net->dest_state & SCTP_ADDR_NOHB)) {
1662                         sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net);
1663                         sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_HB_TMR, SCTP_SO_NOT_LOCKED);
1664                 }
1665                 break;
1666         case SCTP_TIMER_TYPE_COOKIE:
1667                 if ((stcb == NULL) || (inp == NULL)) {
1668                         break;
1669                 }
1670                 if (sctp_cookie_timer(inp, stcb, net)) {
1671                         /* no need to unlock on tcb its gone */
1672                         goto out_decr;
1673                 }
1674                 SCTP_STAT_INCR(sctps_timocookie);
1675                 stcb->asoc.timocookie++;
1676 #ifdef SCTP_AUDITING_ENABLED
1677                 sctp_auditing(4, inp, stcb, net);
1678 #endif
1679                 /*
1680                  * We consider T3 and Cookie timer pretty much the same with
1681                  * respect to where from in chunk_output.
1682                  */
1683                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1684                 break;
1685         case SCTP_TIMER_TYPE_NEWCOOKIE:
1686                 {
1687                         struct timeval tv;
1688                         int i, secret;
1689
1690                         if (inp == NULL) {
1691                                 break;
1692                         }
1693                         SCTP_STAT_INCR(sctps_timosecret);
1694                         (void)SCTP_GETTIME_TIMEVAL(&tv);
1695                         SCTP_INP_WLOCK(inp);
1696                         inp->sctp_ep.time_of_secret_change = tv.tv_sec;
1697                         inp->sctp_ep.last_secret_number =
1698                             inp->sctp_ep.current_secret_number;
1699                         inp->sctp_ep.current_secret_number++;
1700                         if (inp->sctp_ep.current_secret_number >=
1701                             SCTP_HOW_MANY_SECRETS) {
1702                                 inp->sctp_ep.current_secret_number = 0;
1703                         }
1704                         secret = (int)inp->sctp_ep.current_secret_number;
1705                         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1706                                 inp->sctp_ep.secret_key[secret][i] =
1707                                     sctp_select_initial_TSN(&inp->sctp_ep);
1708                         }
1709                         SCTP_INP_WUNLOCK(inp);
1710                         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, stcb, net);
1711                 }
1712                 did_output = 0;
1713                 break;
1714         case SCTP_TIMER_TYPE_PATHMTURAISE:
1715                 if ((stcb == NULL) || (inp == NULL)) {
1716                         break;
1717                 }
1718                 SCTP_STAT_INCR(sctps_timopathmtu);
1719                 sctp_pathmtu_timer(inp, stcb, net);
1720                 did_output = 0;
1721                 break;
1722         case SCTP_TIMER_TYPE_SHUTDOWNACK:
1723                 if ((stcb == NULL) || (inp == NULL)) {
1724                         break;
1725                 }
1726                 if (sctp_shutdownack_timer(inp, stcb, net)) {
1727                         /* no need to unlock on tcb its gone */
1728                         goto out_decr;
1729                 }
1730                 SCTP_STAT_INCR(sctps_timoshutdownack);
1731                 stcb->asoc.timoshutdownack++;
1732 #ifdef SCTP_AUDITING_ENABLED
1733                 sctp_auditing(4, inp, stcb, net);
1734 #endif
1735                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_ACK_TMR, SCTP_SO_NOT_LOCKED);
1736                 break;
1737         case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
1738                 if ((stcb == NULL) || (inp == NULL)) {
1739                         break;
1740                 }
1741                 SCTP_STAT_INCR(sctps_timoshutdownguard);
1742                 sctp_abort_an_association(inp, stcb, NULL, SCTP_SO_NOT_LOCKED);
1743                 /* no need to unlock on tcb its gone */
1744                 goto out_decr;
1745
1746         case SCTP_TIMER_TYPE_STRRESET:
1747                 if ((stcb == NULL) || (inp == NULL)) {
1748                         break;
1749                 }
1750                 if (sctp_strreset_timer(inp, stcb, net)) {
1751                         /* no need to unlock on tcb its gone */
1752                         goto out_decr;
1753                 }
1754                 SCTP_STAT_INCR(sctps_timostrmrst);
1755                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_TMR, SCTP_SO_NOT_LOCKED);
1756                 break;
1757         case SCTP_TIMER_TYPE_ASCONF:
1758                 if ((stcb == NULL) || (inp == NULL)) {
1759                         break;
1760                 }
1761                 if (sctp_asconf_timer(inp, stcb, net)) {
1762                         /* no need to unlock on tcb its gone */
1763                         goto out_decr;
1764                 }
1765                 SCTP_STAT_INCR(sctps_timoasconf);
1766 #ifdef SCTP_AUDITING_ENABLED
1767                 sctp_auditing(4, inp, stcb, net);
1768 #endif
1769                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_ASCONF_TMR, SCTP_SO_NOT_LOCKED);
1770                 break;
1771         case SCTP_TIMER_TYPE_PRIM_DELETED:
1772                 if ((stcb == NULL) || (inp == NULL)) {
1773                         break;
1774                 }
1775                 sctp_delete_prim_timer(inp, stcb, net);
1776                 SCTP_STAT_INCR(sctps_timodelprim);
1777                 break;
1778
1779         case SCTP_TIMER_TYPE_AUTOCLOSE:
1780                 if ((stcb == NULL) || (inp == NULL)) {
1781                         break;
1782                 }
1783                 SCTP_STAT_INCR(sctps_timoautoclose);
1784                 sctp_autoclose_timer(inp, stcb, net);
1785                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
1786                 did_output = 0;
1787                 break;
1788         case SCTP_TIMER_TYPE_ASOCKILL:
1789                 if ((stcb == NULL) || (inp == NULL)) {
1790                         break;
1791                 }
1792                 SCTP_STAT_INCR(sctps_timoassockill);
1793                 /* Can we free it yet? */
1794                 SCTP_INP_DECR_REF(inp);
1795                 sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL, SCTP_FROM_SCTPUTIL + SCTP_LOC_1);
1796 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1797                 so = SCTP_INP_SO(inp);
1798                 atomic_add_int(&stcb->asoc.refcnt, 1);
1799                 SCTP_TCB_UNLOCK(stcb);
1800                 SCTP_SOCKET_LOCK(so, 1);
1801                 SCTP_TCB_LOCK(stcb);
1802                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1803 #endif
1804                 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTPUTIL + SCTP_LOC_2);
1805 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1806                 SCTP_SOCKET_UNLOCK(so, 1);
1807 #endif
1808                 /*
1809                  * free asoc, always unlocks (or destroy's) so prevent
1810                  * duplicate unlock or unlock of a free mtx :-0
1811                  */
1812                 stcb = NULL;
1813                 goto out_no_decr;
1814         case SCTP_TIMER_TYPE_INPKILL:
1815                 SCTP_STAT_INCR(sctps_timoinpkill);
1816                 if (inp == NULL) {
1817                         break;
1818                 }
1819                 /*
1820                  * special case, take away our increment since WE are the
1821                  * killer
1822                  */
1823                 SCTP_INP_DECR_REF(inp);
1824                 sctp_timer_stop(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL, SCTP_FROM_SCTPUTIL + SCTP_LOC_3);
1825                 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
1826                     SCTP_CALLED_FROM_INPKILL_TIMER);
1827                 inp = NULL;
1828                 goto out_no_decr;
1829         default:
1830                 SCTPDBG(SCTP_DEBUG_TIMER1, "sctp_timeout_handler:unknown timer %d\n",
1831                     tmr->type);
1832                 break;
1833         }
1834 #ifdef SCTP_AUDITING_ENABLED
1835         sctp_audit_log(0xF1, (uint8_t) tmr->type);
1836         if (inp)
1837                 sctp_auditing(5, inp, stcb, net);
1838 #endif
1839         if ((did_output) && stcb) {
1840                 /*
1841                  * Now we need to clean up the control chunk chain if an
1842                  * ECNE is on it. It must be marked as UNSENT again so next
1843                  * call will continue to send it until such time that we get
1844                  * a CWR, to remove it. It is, however, less likely that we
1845                  * will find a ecn echo on the chain though.
1846                  */
1847                 sctp_fix_ecn_echo(&stcb->asoc);
1848         }
1849 get_out:
1850         if (stcb) {
1851                 SCTP_TCB_UNLOCK(stcb);
1852         }
1853 out_decr:
1854         if (inp) {
1855                 SCTP_INP_DECR_REF(inp);
1856         }
1857 out_no_decr:
1858         SCTPDBG(SCTP_DEBUG_TIMER1, "Timer now complete (type %d)\n",
1859             type);
1860         CURVNET_RESTORE();
1861 }
1862
1863 void
1864 sctp_timer_start(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1865     struct sctp_nets *net)
1866 {
1867         uint32_t to_ticks;
1868         struct sctp_timer *tmr;
1869
1870         if ((t_type != SCTP_TIMER_TYPE_ADDR_WQ) && (inp == NULL))
1871                 return;
1872
1873         tmr = NULL;
1874         if (stcb) {
1875                 SCTP_TCB_LOCK_ASSERT(stcb);
1876         }
1877         switch (t_type) {
1878         case SCTP_TIMER_TYPE_ZERO_COPY:
1879                 tmr = &inp->sctp_ep.zero_copy_timer;
1880                 to_ticks = SCTP_ZERO_COPY_TICK_DELAY;
1881                 break;
1882         case SCTP_TIMER_TYPE_ZCOPY_SENDQ:
1883                 tmr = &inp->sctp_ep.zero_copy_sendq_timer;
1884                 to_ticks = SCTP_ZERO_COPY_SENDQ_TICK_DELAY;
1885                 break;
1886         case SCTP_TIMER_TYPE_ADDR_WQ:
1887                 /* Only 1 tick away :-) */
1888                 tmr = &SCTP_BASE_INFO(addr_wq_timer);
1889                 to_ticks = SCTP_ADDRESS_TICK_DELAY;
1890                 break;
1891         case SCTP_TIMER_TYPE_SEND:
1892                 /* Here we use the RTO timer */
1893                 {
1894                         int rto_val;
1895
1896                         if ((stcb == NULL) || (net == NULL)) {
1897                                 return;
1898                         }
1899                         tmr = &net->rxt_timer;
1900                         if (net->RTO == 0) {
1901                                 rto_val = stcb->asoc.initial_rto;
1902                         } else {
1903                                 rto_val = net->RTO;
1904                         }
1905                         to_ticks = MSEC_TO_TICKS(rto_val);
1906                 }
1907                 break;
1908         case SCTP_TIMER_TYPE_INIT:
1909                 /*
1910                  * Here we use the INIT timer default usually about 1
1911                  * minute.
1912                  */
1913                 if ((stcb == NULL) || (net == NULL)) {
1914                         return;
1915                 }
1916                 tmr = &net->rxt_timer;
1917                 if (net->RTO == 0) {
1918                         to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
1919                 } else {
1920                         to_ticks = MSEC_TO_TICKS(net->RTO);
1921                 }
1922                 break;
1923         case SCTP_TIMER_TYPE_RECV:
1924                 /*
1925                  * Here we use the Delayed-Ack timer value from the inp
1926                  * ususually about 200ms.
1927                  */
1928                 if (stcb == NULL) {
1929                         return;
1930                 }
1931                 tmr = &stcb->asoc.dack_timer;
1932                 to_ticks = MSEC_TO_TICKS(stcb->asoc.delayed_ack);
1933                 break;
1934         case SCTP_TIMER_TYPE_SHUTDOWN:
1935                 /* Here we use the RTO of the destination. */
1936                 if ((stcb == NULL) || (net == NULL)) {
1937                         return;
1938                 }
1939                 if (net->RTO == 0) {
1940                         to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
1941                 } else {
1942                         to_ticks = MSEC_TO_TICKS(net->RTO);
1943                 }
1944                 tmr = &net->rxt_timer;
1945                 break;
1946         case SCTP_TIMER_TYPE_HEARTBEAT:
1947                 /*
1948                  * the net is used here so that we can add in the RTO. Even
1949                  * though we use a different timer. We also add the HB timer
1950                  * PLUS a random jitter.
1951                  */
1952                 if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
1953                         return;
1954                 } else {
1955                         uint32_t rndval;
1956                         uint32_t jitter;
1957
1958                         if ((net->dest_state & SCTP_ADDR_NOHB) &&
1959                             !(net->dest_state & SCTP_ADDR_UNCONFIRMED)) {
1960                                 return;
1961                         }
1962                         if (net->RTO == 0) {
1963                                 to_ticks = stcb->asoc.initial_rto;
1964                         } else {
1965                                 to_ticks = net->RTO;
1966                         }
1967                         rndval = sctp_select_initial_TSN(&inp->sctp_ep);
1968                         jitter = rndval % to_ticks;
1969                         if (jitter >= (to_ticks >> 1)) {
1970                                 to_ticks = to_ticks + (jitter - (to_ticks >> 1));
1971                         } else {
1972                                 to_ticks = to_ticks - jitter;
1973                         }
1974                         if (!(net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
1975                             !(net->dest_state & SCTP_ADDR_PF)) {
1976                                 to_ticks += net->heart_beat_delay;
1977                         }
1978                         /*
1979                          * Now we must convert the to_ticks that are now in
1980                          * ms to ticks.
1981                          */
1982                         to_ticks = MSEC_TO_TICKS(to_ticks);
1983                         tmr = &net->hb_timer;
1984                 }
1985                 break;
1986         case SCTP_TIMER_TYPE_COOKIE:
1987                 /*
1988                  * Here we can use the RTO timer from the network since one
1989                  * RTT was compelete. If a retran happened then we will be
1990                  * using the RTO initial value.
1991                  */
1992                 if ((stcb == NULL) || (net == NULL)) {
1993                         return;
1994                 }
1995                 if (net->RTO == 0) {
1996                         to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
1997                 } else {
1998                         to_ticks = MSEC_TO_TICKS(net->RTO);
1999                 }
2000                 tmr = &net->rxt_timer;
2001                 break;
2002         case SCTP_TIMER_TYPE_NEWCOOKIE:
2003                 /*
2004                  * nothing needed but the endpoint here ususually about 60
2005                  * minutes.
2006                  */
2007                 if (inp == NULL) {
2008                         return;
2009                 }
2010                 tmr = &inp->sctp_ep.signature_change;
2011                 to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_SIGNATURE];
2012                 break;
2013         case SCTP_TIMER_TYPE_ASOCKILL:
2014                 if (stcb == NULL) {
2015                         return;
2016                 }
2017                 tmr = &stcb->asoc.strreset_timer;
2018                 to_ticks = MSEC_TO_TICKS(SCTP_ASOC_KILL_TIMEOUT);
2019                 break;
2020         case SCTP_TIMER_TYPE_INPKILL:
2021                 /*
2022                  * The inp is setup to die. We re-use the signature_chage
2023                  * timer since that has stopped and we are in the GONE
2024                  * state.
2025                  */
2026                 if (inp == NULL) {
2027                         return;
2028                 }
2029                 tmr = &inp->sctp_ep.signature_change;
2030                 to_ticks = MSEC_TO_TICKS(SCTP_INP_KILL_TIMEOUT);
2031                 break;
2032         case SCTP_TIMER_TYPE_PATHMTURAISE:
2033                 /*
2034                  * Here we use the value found in the EP for PMTU ususually
2035                  * about 10 minutes.
2036                  */
2037                 if ((stcb == NULL) || (inp == NULL)) {
2038                         return;
2039                 }
2040                 if (net == NULL) {
2041                         return;
2042                 }
2043                 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
2044                         return;
2045                 }
2046                 to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_PMTU];
2047                 tmr = &net->pmtu_timer;
2048                 break;
2049         case SCTP_TIMER_TYPE_SHUTDOWNACK:
2050                 /* Here we use the RTO of the destination */
2051                 if ((stcb == NULL) || (net == NULL)) {
2052                         return;
2053                 }
2054                 if (net->RTO == 0) {
2055                         to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
2056                 } else {
2057                         to_ticks = MSEC_TO_TICKS(net->RTO);
2058                 }
2059                 tmr = &net->rxt_timer;
2060                 break;
2061         case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
2062                 /*
2063                  * Here we use the endpoints shutdown guard timer usually
2064                  * about 3 minutes.
2065                  */
2066                 if ((inp == NULL) || (stcb == NULL)) {
2067                         return;
2068                 }
2069                 to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN];
2070                 tmr = &stcb->asoc.shut_guard_timer;
2071                 break;
2072         case SCTP_TIMER_TYPE_STRRESET:
2073                 /*
2074                  * Here the timer comes from the stcb but its value is from
2075                  * the net's RTO.
2076                  */
2077                 if ((stcb == NULL) || (net == NULL)) {
2078                         return;
2079                 }
2080                 if (net->RTO == 0) {
2081                         to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
2082                 } else {
2083                         to_ticks = MSEC_TO_TICKS(net->RTO);
2084                 }
2085                 tmr = &stcb->asoc.strreset_timer;
2086                 break;
2087         case SCTP_TIMER_TYPE_ASCONF:
2088                 /*
2089                  * Here the timer comes from the stcb but its value is from
2090                  * the net's RTO.
2091                  */
2092                 if ((stcb == NULL) || (net == NULL)) {
2093                         return;
2094                 }
2095                 if (net->RTO == 0) {
2096                         to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
2097                 } else {
2098                         to_ticks = MSEC_TO_TICKS(net->RTO);
2099                 }
2100                 tmr = &stcb->asoc.asconf_timer;
2101                 break;
2102         case SCTP_TIMER_TYPE_PRIM_DELETED:
2103                 if ((stcb == NULL) || (net != NULL)) {
2104                         return;
2105                 }
2106                 to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
2107                 tmr = &stcb->asoc.delete_prim_timer;
2108                 break;
2109         case SCTP_TIMER_TYPE_AUTOCLOSE:
2110                 if (stcb == NULL) {
2111                         return;
2112                 }
2113                 if (stcb->asoc.sctp_autoclose_ticks == 0) {
2114                         /*
2115                          * Really an error since stcb is NOT set to
2116                          * autoclose
2117                          */
2118                         return;
2119                 }
2120                 to_ticks = stcb->asoc.sctp_autoclose_ticks;
2121                 tmr = &stcb->asoc.autoclose_timer;
2122                 break;
2123         default:
2124                 SCTPDBG(SCTP_DEBUG_TIMER1, "%s: Unknown timer type %d\n",
2125                     __FUNCTION__, t_type);
2126                 return;
2127                 break;
2128         }
2129         if ((to_ticks <= 0) || (tmr == NULL)) {
2130                 SCTPDBG(SCTP_DEBUG_TIMER1, "%s: %d:software error to_ticks:%d tmr:%p not set ??\n",
2131                     __FUNCTION__, t_type, to_ticks, (void *)tmr);
2132                 return;
2133         }
2134         if (SCTP_OS_TIMER_PENDING(&tmr->timer)) {
2135                 /*
2136                  * we do NOT allow you to have it already running. if it is
2137                  * we leave the current one up unchanged
2138                  */
2139                 return;
2140         }
2141         /* At this point we can proceed */
2142         if (t_type == SCTP_TIMER_TYPE_SEND) {
2143                 stcb->asoc.num_send_timers_up++;
2144         }
2145         tmr->stopped_from = 0;
2146         tmr->type = t_type;
2147         tmr->ep = (void *)inp;
2148         tmr->tcb = (void *)stcb;
2149         tmr->net = (void *)net;
2150         tmr->self = (void *)tmr;
2151         tmr->vnet = (void *)curvnet;
2152         tmr->ticks = sctp_get_tick_count();
2153         (void)SCTP_OS_TIMER_START(&tmr->timer, to_ticks, sctp_timeout_handler, tmr);
2154         return;
2155 }
2156
2157 void
2158 sctp_timer_stop(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2159     struct sctp_nets *net, uint32_t from)
2160 {
2161         struct sctp_timer *tmr;
2162
2163         if ((t_type != SCTP_TIMER_TYPE_ADDR_WQ) &&
2164             (inp == NULL))
2165                 return;
2166
2167         tmr = NULL;
2168         if (stcb) {
2169                 SCTP_TCB_LOCK_ASSERT(stcb);
2170         }
2171         switch (t_type) {
2172         case SCTP_TIMER_TYPE_ZERO_COPY:
2173                 tmr = &inp->sctp_ep.zero_copy_timer;
2174                 break;
2175         case SCTP_TIMER_TYPE_ZCOPY_SENDQ:
2176                 tmr = &inp->sctp_ep.zero_copy_sendq_timer;
2177                 break;
2178         case SCTP_TIMER_TYPE_ADDR_WQ:
2179                 tmr = &SCTP_BASE_INFO(addr_wq_timer);
2180                 break;
2181         case SCTP_TIMER_TYPE_SEND:
2182                 if ((stcb == NULL) || (net == NULL)) {
2183                         return;
2184                 }
2185                 tmr = &net->rxt_timer;
2186                 break;
2187         case SCTP_TIMER_TYPE_INIT:
2188                 if ((stcb == NULL) || (net == NULL)) {
2189                         return;
2190                 }
2191                 tmr = &net->rxt_timer;
2192                 break;
2193         case SCTP_TIMER_TYPE_RECV:
2194                 if (stcb == NULL) {
2195                         return;
2196                 }
2197                 tmr = &stcb->asoc.dack_timer;
2198                 break;
2199         case SCTP_TIMER_TYPE_SHUTDOWN:
2200                 if ((stcb == NULL) || (net == NULL)) {
2201                         return;
2202                 }
2203                 tmr = &net->rxt_timer;
2204                 break;
2205         case SCTP_TIMER_TYPE_HEARTBEAT:
2206                 if ((stcb == NULL) || (net == NULL)) {
2207                         return;
2208                 }
2209                 tmr = &net->hb_timer;
2210                 break;
2211         case SCTP_TIMER_TYPE_COOKIE:
2212                 if ((stcb == NULL) || (net == NULL)) {
2213                         return;
2214                 }
2215                 tmr = &net->rxt_timer;
2216                 break;
2217         case SCTP_TIMER_TYPE_NEWCOOKIE:
2218                 /* nothing needed but the endpoint here */
2219                 tmr = &inp->sctp_ep.signature_change;
2220                 /*
2221                  * We re-use the newcookie timer for the INP kill timer. We
2222                  * must assure that we do not kill it by accident.
2223                  */
2224                 break;
2225         case SCTP_TIMER_TYPE_ASOCKILL:
2226                 /*
2227                  * Stop the asoc kill timer.
2228                  */
2229                 if (stcb == NULL) {
2230                         return;
2231                 }
2232                 tmr = &stcb->asoc.strreset_timer;
2233                 break;
2234
2235         case SCTP_TIMER_TYPE_INPKILL:
2236                 /*
2237                  * The inp is setup to die. We re-use the signature_chage
2238                  * timer since that has stopped and we are in the GONE
2239                  * state.
2240                  */
2241                 tmr = &inp->sctp_ep.signature_change;
2242                 break;
2243         case SCTP_TIMER_TYPE_PATHMTURAISE:
2244                 if ((stcb == NULL) || (net == NULL)) {
2245                         return;
2246                 }
2247                 tmr = &net->pmtu_timer;
2248                 break;
2249         case SCTP_TIMER_TYPE_SHUTDOWNACK:
2250                 if ((stcb == NULL) || (net == NULL)) {
2251                         return;
2252                 }
2253                 tmr = &net->rxt_timer;
2254                 break;
2255         case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
2256                 if (stcb == NULL) {
2257                         return;
2258                 }
2259                 tmr = &stcb->asoc.shut_guard_timer;
2260                 break;
2261         case SCTP_TIMER_TYPE_STRRESET:
2262                 if (stcb == NULL) {
2263                         return;
2264                 }
2265                 tmr = &stcb->asoc.strreset_timer;
2266                 break;
2267         case SCTP_TIMER_TYPE_ASCONF:
2268                 if (stcb == NULL) {
2269                         return;
2270                 }
2271                 tmr = &stcb->asoc.asconf_timer;
2272                 break;
2273         case SCTP_TIMER_TYPE_PRIM_DELETED:
2274                 if (stcb == NULL) {
2275                         return;
2276                 }
2277                 tmr = &stcb->asoc.delete_prim_timer;
2278                 break;
2279         case SCTP_TIMER_TYPE_AUTOCLOSE:
2280                 if (stcb == NULL) {
2281                         return;
2282                 }
2283                 tmr = &stcb->asoc.autoclose_timer;
2284                 break;
2285         default:
2286                 SCTPDBG(SCTP_DEBUG_TIMER1, "%s: Unknown timer type %d\n",
2287                     __FUNCTION__, t_type);
2288                 break;
2289         }
2290         if (tmr == NULL) {
2291                 return;
2292         }
2293         if ((tmr->type != t_type) && tmr->type) {
2294                 /*
2295                  * Ok we have a timer that is under joint use. Cookie timer
2296                  * per chance with the SEND timer. We therefore are NOT
2297                  * running the timer that the caller wants stopped.  So just
2298                  * return.
2299                  */
2300                 return;
2301         }
2302         if ((t_type == SCTP_TIMER_TYPE_SEND) && (stcb != NULL)) {
2303                 stcb->asoc.num_send_timers_up--;
2304                 if (stcb->asoc.num_send_timers_up < 0) {
2305                         stcb->asoc.num_send_timers_up = 0;
2306                 }
2307         }
2308         tmr->self = NULL;
2309         tmr->stopped_from = from;
2310         (void)SCTP_OS_TIMER_STOP(&tmr->timer);
2311         return;
2312 }
2313
2314 uint32_t
2315 sctp_calculate_len(struct mbuf *m)
2316 {
2317         uint32_t tlen = 0;
2318         struct mbuf *at;
2319
2320         at = m;
2321         while (at) {
2322                 tlen += SCTP_BUF_LEN(at);
2323                 at = SCTP_BUF_NEXT(at);
2324         }
2325         return (tlen);
2326 }
2327
2328 void
2329 sctp_mtu_size_reset(struct sctp_inpcb *inp,
2330     struct sctp_association *asoc, uint32_t mtu)
2331 {
2332         /*
2333          * Reset the P-MTU size on this association, this involves changing
2334          * the asoc MTU, going through ANY chunk+overhead larger than mtu to
2335          * allow the DF flag to be cleared.
2336          */
2337         struct sctp_tmit_chunk *chk;
2338         unsigned int eff_mtu, ovh;
2339
2340         asoc->smallest_mtu = mtu;
2341         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2342                 ovh = SCTP_MIN_OVERHEAD;
2343         } else {
2344                 ovh = SCTP_MIN_V4_OVERHEAD;
2345         }
2346         eff_mtu = mtu - ovh;
2347         TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
2348                 if (chk->send_size > eff_mtu) {
2349                         chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
2350                 }
2351         }
2352         TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2353                 if (chk->send_size > eff_mtu) {
2354                         chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
2355                 }
2356         }
2357 }
2358
2359
2360 /*
2361  * given an association and starting time of the current RTT period return
2362  * RTO in number of msecs net should point to the current network
2363  */
2364
2365 uint32_t
2366 sctp_calculate_rto(struct sctp_tcb *stcb,
2367     struct sctp_association *asoc,
2368     struct sctp_nets *net,
2369     struct timeval *told,
2370     int safe, int rtt_from_sack)
2371 {
2372         /*-
2373          * given an association and the starting time of the current RTT
2374          * period (in value1/value2) return RTO in number of msecs.
2375          */
2376         int32_t rtt;            /* RTT in ms */
2377         uint32_t new_rto;
2378         int first_measure = 0;
2379         struct timeval now, then, *old;
2380
2381         /* Copy it out for sparc64 */
2382         if (safe == sctp_align_unsafe_makecopy) {
2383                 old = &then;
2384                 memcpy(&then, told, sizeof(struct timeval));
2385         } else if (safe == sctp_align_safe_nocopy) {
2386                 old = told;
2387         } else {
2388                 /* error */
2389                 SCTP_PRINTF("Huh, bad rto calc call\n");
2390                 return (0);
2391         }
2392         /************************/
2393         /* 1. calculate new RTT */
2394         /************************/
2395         /* get the current time */
2396         if (stcb->asoc.use_precise_time) {
2397                 (void)SCTP_GETPTIME_TIMEVAL(&now);
2398         } else {
2399                 (void)SCTP_GETTIME_TIMEVAL(&now);
2400         }
2401         timevalsub(&now, old);
2402         /* store the current RTT in us */
2403         net->rtt = (uint64_t) 1000000 *(uint64_t) now.tv_sec +
2404                 (uint64_t) now.tv_usec;
2405
2406         /* compute rtt in ms */
2407         rtt = (int32_t) (net->rtt / 1000);
2408         if ((asoc->cc_functions.sctp_rtt_calculated) && (rtt_from_sack == SCTP_RTT_FROM_DATA)) {
2409                 /*
2410                  * Tell the CC module that a new update has just occurred
2411                  * from a sack
2412                  */
2413                 (*asoc->cc_functions.sctp_rtt_calculated) (stcb, net, &now);
2414         }
2415         /*
2416          * Do we need to determine the lan? We do this only on sacks i.e.
2417          * RTT being determined from data not non-data (HB/INIT->INITACK).
2418          */
2419         if ((rtt_from_sack == SCTP_RTT_FROM_DATA) &&
2420             (net->lan_type == SCTP_LAN_UNKNOWN)) {
2421                 if (net->rtt > SCTP_LOCAL_LAN_RTT) {
2422                         net->lan_type = SCTP_LAN_INTERNET;
2423                 } else {
2424                         net->lan_type = SCTP_LAN_LOCAL;
2425                 }
2426         }
2427         /***************************/
2428         /* 2. update RTTVAR & SRTT */
2429         /***************************/
2430         /*-
2431          * Compute the scaled average lastsa and the
2432          * scaled variance lastsv as described in van Jacobson
2433          * Paper "Congestion Avoidance and Control", Annex A.
2434          *
2435          * (net->lastsa >> SCTP_RTT_SHIFT) is the srtt
2436          * (net->lastsa >> SCTP_RTT_VAR_SHIFT) is the rttvar
2437          */
2438         if (net->RTO_measured) {
2439                 rtt -= (net->lastsa >> SCTP_RTT_SHIFT);
2440                 net->lastsa += rtt;
2441                 if (rtt < 0) {
2442                         rtt = -rtt;
2443                 }
2444                 rtt -= (net->lastsv >> SCTP_RTT_VAR_SHIFT);
2445                 net->lastsv += rtt;
2446                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) {
2447                         rto_logging(net, SCTP_LOG_RTTVAR);
2448                 }
2449         } else {
2450                 /* First RTO measurment */
2451                 net->RTO_measured = 1;
2452                 first_measure = 1;
2453                 net->lastsa = rtt << SCTP_RTT_SHIFT;
2454                 net->lastsv = (rtt / 2) << SCTP_RTT_VAR_SHIFT;
2455                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) {
2456                         rto_logging(net, SCTP_LOG_INITIAL_RTT);
2457                 }
2458         }
2459         if (net->lastsv == 0) {
2460                 net->lastsv = SCTP_CLOCK_GRANULARITY;
2461         }
2462         new_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
2463         if ((new_rto > SCTP_SAT_NETWORK_MIN) &&
2464             (stcb->asoc.sat_network_lockout == 0)) {
2465                 stcb->asoc.sat_network = 1;
2466         } else if ((!first_measure) && stcb->asoc.sat_network) {
2467                 stcb->asoc.sat_network = 0;
2468                 stcb->asoc.sat_network_lockout = 1;
2469         }
2470         /* bound it, per C6/C7 in Section 5.3.1 */
2471         if (new_rto < stcb->asoc.minrto) {
2472                 new_rto = stcb->asoc.minrto;
2473         }
2474         if (new_rto > stcb->asoc.maxrto) {
2475                 new_rto = stcb->asoc.maxrto;
2476         }
2477         /* we are now returning the RTO */
2478         return (new_rto);
2479 }
2480
2481 /*
2482  * return a pointer to a contiguous piece of data from the given mbuf chain
2483  * starting at 'off' for 'len' bytes.  If the desired piece spans more than
2484  * one mbuf, a copy is made at 'ptr'. caller must ensure that the buffer size
2485  * is >= 'len' returns NULL if there there isn't 'len' bytes in the chain.
2486  */
2487 caddr_t
2488 sctp_m_getptr(struct mbuf *m, int off, int len, uint8_t * in_ptr)
2489 {
2490         uint32_t count;
2491         uint8_t *ptr;
2492
2493         ptr = in_ptr;
2494         if ((off < 0) || (len <= 0))
2495                 return (NULL);
2496
2497         /* find the desired start location */
2498         while ((m != NULL) && (off > 0)) {
2499                 if (off < SCTP_BUF_LEN(m))
2500                         break;
2501                 off -= SCTP_BUF_LEN(m);
2502                 m = SCTP_BUF_NEXT(m);
2503         }
2504         if (m == NULL)
2505                 return (NULL);
2506
2507         /* is the current mbuf large enough (eg. contiguous)? */
2508         if ((SCTP_BUF_LEN(m) - off) >= len) {
2509                 return (mtod(m, caddr_t)+off);
2510         } else {
2511                 /* else, it spans more than one mbuf, so save a temp copy... */
2512                 while ((m != NULL) && (len > 0)) {
2513                         count = min(SCTP_BUF_LEN(m) - off, len);
2514                         bcopy(mtod(m, caddr_t)+off, ptr, count);
2515                         len -= count;
2516                         ptr += count;
2517                         off = 0;
2518                         m = SCTP_BUF_NEXT(m);
2519                 }
2520                 if ((m == NULL) && (len > 0))
2521                         return (NULL);
2522                 else
2523                         return ((caddr_t)in_ptr);
2524         }
2525 }
2526
2527
2528
2529 struct sctp_paramhdr *
2530 sctp_get_next_param(struct mbuf *m,
2531     int offset,
2532     struct sctp_paramhdr *pull,
2533     int pull_limit)
2534 {
2535         /* This just provides a typed signature to Peter's Pull routine */
2536         return ((struct sctp_paramhdr *)sctp_m_getptr(m, offset, pull_limit,
2537             (uint8_t *) pull));
2538 }
2539
2540
2541 struct mbuf *
2542 sctp_add_pad_tombuf(struct mbuf *m, int padlen)
2543 {
2544         struct mbuf *m_last;
2545         caddr_t dp;
2546
2547         if (padlen > 3) {
2548                 return (NULL);
2549         }
2550         if (padlen <= M_TRAILINGSPACE(m)) {
2551                 /*
2552                  * The easy way. We hope the majority of the time we hit
2553                  * here :)
2554                  */
2555                 m_last = m;
2556         } else {
2557                 /* Hard way we must grow the mbuf chain */
2558                 m_last = sctp_get_mbuf_for_msg(padlen, 0, M_NOWAIT, 1, MT_DATA);
2559                 if (m_last == NULL) {
2560                         return (NULL);
2561                 }
2562                 SCTP_BUF_LEN(m_last) = 0;
2563                 SCTP_BUF_NEXT(m_last) = NULL;
2564                 SCTP_BUF_NEXT(m) = m_last;
2565         }
2566         dp = mtod(m_last, caddr_t)+SCTP_BUF_LEN(m_last);
2567         SCTP_BUF_LEN(m_last) += padlen;
2568         memset(dp, 0, padlen);
2569         return (m_last);
2570 }
2571
2572 struct mbuf *
2573 sctp_pad_lastmbuf(struct mbuf *m, int padval, struct mbuf *last_mbuf)
2574 {
2575         /* find the last mbuf in chain and pad it */
2576         struct mbuf *m_at;
2577
2578         if (last_mbuf != NULL) {
2579                 return (sctp_add_pad_tombuf(last_mbuf, padval));
2580         } else {
2581                 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
2582                         if (SCTP_BUF_NEXT(m_at) == NULL) {
2583                                 return (sctp_add_pad_tombuf(m_at, padval));
2584                         }
2585                 }
2586         }
2587         return (NULL);
2588 }
2589
2590 static void
2591 sctp_notify_assoc_change(uint16_t state, struct sctp_tcb *stcb,
2592     uint16_t error, struct sctp_abort_chunk *abort, uint8_t from_peer, int so_locked
2593 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
2594     SCTP_UNUSED
2595 #endif
2596 )
2597 {
2598         struct mbuf *m_notify;
2599         struct sctp_assoc_change *sac;
2600         struct sctp_queued_to_read *control;
2601         size_t notif_len, abort_len;
2602         unsigned int i;
2603
2604 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2605         struct socket *so;
2606
2607 #endif
2608
2609         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVASSOCEVNT)) {
2610                 notif_len = sizeof(struct sctp_assoc_change);
2611                 if (abort != NULL) {
2612                         abort_len = ntohs(abort->ch.chunk_length);
2613                 } else {
2614                         abort_len = 0;
2615                 }
2616                 if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) {
2617                         notif_len += SCTP_ASSOC_SUPPORTS_MAX;
2618                 } else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) {
2619                         notif_len += abort_len;
2620                 }
2621                 m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
2622                 if (m_notify == NULL) {
2623                         /* Retry with smaller value. */
2624                         notif_len = sizeof(struct sctp_assoc_change);
2625                         m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
2626                         if (m_notify == NULL) {
2627                                 goto set_error;
2628                         }
2629                 }
2630                 SCTP_BUF_NEXT(m_notify) = NULL;
2631                 sac = mtod(m_notify, struct sctp_assoc_change *);
2632                 memset(sac, 0, notif_len);
2633                 sac->sac_type = SCTP_ASSOC_CHANGE;
2634                 sac->sac_flags = 0;
2635                 sac->sac_length = sizeof(struct sctp_assoc_change);
2636                 sac->sac_state = state;
2637                 sac->sac_error = error;
2638                 /* XXX verify these stream counts */
2639                 sac->sac_outbound_streams = stcb->asoc.streamoutcnt;
2640                 sac->sac_inbound_streams = stcb->asoc.streamincnt;
2641                 sac->sac_assoc_id = sctp_get_associd(stcb);
2642                 if (notif_len > sizeof(struct sctp_assoc_change)) {
2643                         if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) {
2644                                 i = 0;
2645                                 if (stcb->asoc.prsctp_supported == 1) {
2646                                         sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_PR;
2647                                 }
2648                                 if (stcb->asoc.auth_supported == 1) {
2649                                         sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_AUTH;
2650                                 }
2651                                 if (stcb->asoc.asconf_supported == 1) {
2652                                         sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_ASCONF;
2653                                 }
2654                                 sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_MULTIBUF;
2655                                 if (stcb->asoc.reconfig_supported == 1) {
2656                                         sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_RE_CONFIG;
2657                                 }
2658                                 sac->sac_length += i;
2659                         } else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) {
2660                                 memcpy(sac->sac_info, abort, abort_len);
2661                                 sac->sac_length += abort_len;
2662                         }
2663                 }
2664                 SCTP_BUF_LEN(m_notify) = sac->sac_length;
2665                 control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
2666                     0, 0, stcb->asoc.context, 0, 0, 0,
2667                     m_notify);
2668                 if (control != NULL) {
2669                         control->length = SCTP_BUF_LEN(m_notify);
2670                         /* not that we need this */
2671                         control->tail_mbuf = m_notify;
2672                         control->spec_flags = M_NOTIFICATION;
2673                         sctp_add_to_readq(stcb->sctp_ep, stcb,
2674                             control,
2675                             &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD,
2676                             so_locked);
2677                 } else {
2678                         sctp_m_freem(m_notify);
2679                 }
2680         }
2681         /*
2682          * For 1-to-1 style sockets, we send up and error when an ABORT
2683          * comes in.
2684          */
2685 set_error:
2686         if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2687             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2688             ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) {
2689                 SOCK_LOCK(stcb->sctp_socket);
2690                 if (from_peer) {
2691                         if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
2692                                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNREFUSED);
2693                                 stcb->sctp_socket->so_error = ECONNREFUSED;
2694                         } else {
2695                                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
2696                                 stcb->sctp_socket->so_error = ECONNRESET;
2697                         }
2698                 } else {
2699                         if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2700                             (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2701                                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ETIMEDOUT);
2702                                 stcb->sctp_socket->so_error = ETIMEDOUT;
2703                         } else {
2704                                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNABORTED);
2705                                 stcb->sctp_socket->so_error = ECONNABORTED;
2706                         }
2707                 }
2708         }
2709         /* Wake ANY sleepers */
2710 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2711         so = SCTP_INP_SO(stcb->sctp_ep);
2712         if (!so_locked) {
2713                 atomic_add_int(&stcb->asoc.refcnt, 1);
2714                 SCTP_TCB_UNLOCK(stcb);
2715                 SCTP_SOCKET_LOCK(so, 1);
2716                 SCTP_TCB_LOCK(stcb);
2717                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2718                 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2719                         SCTP_SOCKET_UNLOCK(so, 1);
2720                         return;
2721                 }
2722         }
2723 #endif
2724         if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2725             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2726             ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) {
2727                 socantrcvmore_locked(stcb->sctp_socket);
2728         }
2729         sorwakeup(stcb->sctp_socket);
2730         sowwakeup(stcb->sctp_socket);
2731 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2732         if (!so_locked) {
2733                 SCTP_SOCKET_UNLOCK(so, 1);
2734         }
2735 #endif
2736 }
2737
2738 static void
2739 sctp_notify_peer_addr_change(struct sctp_tcb *stcb, uint32_t state,
2740     struct sockaddr *sa, uint32_t error)
2741 {
2742         struct mbuf *m_notify;
2743         struct sctp_paddr_change *spc;
2744         struct sctp_queued_to_read *control;
2745
2746         if ((stcb == NULL) ||
2747             sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPADDREVNT)) {
2748                 /* event not enabled */
2749                 return;
2750         }
2751         m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_paddr_change), 0, M_NOWAIT, 1, MT_DATA);
2752         if (m_notify == NULL)
2753                 return;
2754         SCTP_BUF_LEN(m_notify) = 0;
2755         spc = mtod(m_notify, struct sctp_paddr_change *);
2756         memset(spc, 0, sizeof(struct sctp_paddr_change));
2757         spc->spc_type = SCTP_PEER_ADDR_CHANGE;
2758         spc->spc_flags = 0;
2759         spc->spc_length = sizeof(struct sctp_paddr_change);
2760         switch (sa->sa_family) {
2761 #ifdef INET
2762         case AF_INET:
2763                 memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in));
2764                 break;
2765 #endif
2766 #ifdef INET6
2767         case AF_INET6:
2768                 {
2769                         struct sockaddr_in6 *sin6;
2770
2771                         memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in6));
2772
2773                         sin6 = (struct sockaddr_in6 *)&spc->spc_aaddr;
2774                         if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
2775                                 if (sin6->sin6_scope_id == 0) {
2776                                         /* recover scope_id for user */
2777                                         (void)sa6_recoverscope(sin6);
2778                                 } else {
2779                                         /* clear embedded scope_id for user */
2780                                         in6_clearscope(&sin6->sin6_addr);
2781                                 }
2782                         }
2783                         break;
2784                 }
2785 #endif
2786         default:
2787                 /* TSNH */
2788                 break;
2789         }
2790         spc->spc_state = state;
2791         spc->spc_error = error;
2792         spc->spc_assoc_id = sctp_get_associd(stcb);
2793
2794         SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_paddr_change);
2795         SCTP_BUF_NEXT(m_notify) = NULL;
2796
2797         /* append to socket */
2798         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
2799             0, 0, stcb->asoc.context, 0, 0, 0,
2800             m_notify);
2801         if (control == NULL) {
2802                 /* no memory */
2803                 sctp_m_freem(m_notify);
2804                 return;
2805         }
2806         control->length = SCTP_BUF_LEN(m_notify);
2807         control->spec_flags = M_NOTIFICATION;
2808         /* not that we need this */
2809         control->tail_mbuf = m_notify;
2810         sctp_add_to_readq(stcb->sctp_ep, stcb,
2811             control,
2812             &stcb->sctp_socket->so_rcv, 1,
2813             SCTP_READ_LOCK_NOT_HELD,
2814             SCTP_SO_NOT_LOCKED);
2815 }
2816
2817
2818 static void
2819 sctp_notify_send_failed(struct sctp_tcb *stcb, uint8_t sent, uint32_t error,
2820     struct sctp_tmit_chunk *chk, int so_locked
2821 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
2822     SCTP_UNUSED
2823 #endif
2824 )
2825 {
2826         struct mbuf *m_notify;
2827         struct sctp_send_failed *ssf;
2828         struct sctp_send_failed_event *ssfe;
2829         struct sctp_queued_to_read *control;
2830         int length;
2831
2832         if ((stcb == NULL) ||
2833             (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
2834             sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) {
2835                 /* event not enabled */
2836                 return;
2837         }
2838         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
2839                 length = sizeof(struct sctp_send_failed_event);
2840         } else {
2841                 length = sizeof(struct sctp_send_failed);
2842         }
2843         m_notify = sctp_get_mbuf_for_msg(length, 0, M_NOWAIT, 1, MT_DATA);
2844         if (m_notify == NULL)
2845                 /* no space left */
2846                 return;
2847         SCTP_BUF_LEN(m_notify) = 0;
2848         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
2849                 ssfe = mtod(m_notify, struct sctp_send_failed_event *);
2850                 memset(ssfe, 0, length);
2851                 ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
2852                 if (sent) {
2853                         ssfe->ssfe_flags = SCTP_DATA_SENT;
2854                 } else {
2855                         ssfe->ssfe_flags = SCTP_DATA_UNSENT;
2856                 }
2857                 length += chk->send_size;
2858                 length -= sizeof(struct sctp_data_chunk);
2859                 ssfe->ssfe_length = length;
2860                 ssfe->ssfe_error = error;
2861                 /* not exactly what the user sent in, but should be close :) */
2862                 ssfe->ssfe_info.snd_sid = chk->rec.data.stream_number;
2863                 ssfe->ssfe_info.snd_flags = chk->rec.data.rcv_flags;
2864                 ssfe->ssfe_info.snd_ppid = chk->rec.data.payloadtype;
2865                 ssfe->ssfe_info.snd_context = chk->rec.data.context;
2866                 ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
2867                 ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
2868                 SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_send_failed_event);
2869         } else {
2870                 ssf = mtod(m_notify, struct sctp_send_failed *);
2871                 memset(ssf, 0, length);
2872                 ssf->ssf_type = SCTP_SEND_FAILED;
2873                 if (sent) {
2874                         ssf->ssf_flags = SCTP_DATA_SENT;
2875                 } else {
2876                         ssf->ssf_flags = SCTP_DATA_UNSENT;
2877                 }
2878                 length += chk->send_size;
2879                 length -= sizeof(struct sctp_data_chunk);
2880                 ssf->ssf_length = length;
2881                 ssf->ssf_error = error;
2882                 /* not exactly what the user sent in, but should be close :) */
2883                 bzero(&ssf->ssf_info, sizeof(ssf->ssf_info));
2884                 ssf->ssf_info.sinfo_stream = chk->rec.data.stream_number;
2885                 ssf->ssf_info.sinfo_ssn = chk->rec.data.stream_seq;
2886                 ssf->ssf_info.sinfo_flags = chk->rec.data.rcv_flags;
2887                 ssf->ssf_info.sinfo_ppid = chk->rec.data.payloadtype;
2888                 ssf->ssf_info.sinfo_context = chk->rec.data.context;
2889                 ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb);
2890                 ssf->ssf_assoc_id = sctp_get_associd(stcb);
2891                 SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_send_failed);
2892         }
2893         if (chk->data) {
2894                 /*
2895                  * trim off the sctp chunk header(it should be there)
2896                  */
2897                 if (chk->send_size >= sizeof(struct sctp_data_chunk)) {
2898                         m_adj(chk->data, sizeof(struct sctp_data_chunk));
2899                         sctp_mbuf_crush(chk->data);
2900                         chk->send_size -= sizeof(struct sctp_data_chunk);
2901                 }
2902         }
2903         SCTP_BUF_NEXT(m_notify) = chk->data;
2904         /* Steal off the mbuf */
2905         chk->data = NULL;
2906         /*
2907          * For this case, we check the actual socket buffer, since the assoc
2908          * is going away we don't want to overfill the socket buffer for a
2909          * non-reader
2910          */
2911         if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
2912                 sctp_m_freem(m_notify);
2913                 return;
2914         }
2915         /* append to socket */
2916         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
2917             0, 0, stcb->asoc.context, 0, 0, 0,
2918             m_notify);
2919         if (control == NULL) {
2920                 /* no memory */
2921                 sctp_m_freem(m_notify);
2922                 return;
2923         }
2924         control->spec_flags = M_NOTIFICATION;
2925         sctp_add_to_readq(stcb->sctp_ep, stcb,
2926             control,
2927             &stcb->sctp_socket->so_rcv, 1,
2928             SCTP_READ_LOCK_NOT_HELD,
2929             so_locked);
2930 }
2931
2932
2933 static void
2934 sctp_notify_send_failed2(struct sctp_tcb *stcb, uint32_t error,
2935     struct sctp_stream_queue_pending *sp, int so_locked
2936 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
2937     SCTP_UNUSED
2938 #endif
2939 )
2940 {
2941         struct mbuf *m_notify;
2942         struct sctp_send_failed *ssf;
2943         struct sctp_send_failed_event *ssfe;
2944         struct sctp_queued_to_read *control;
2945         int length;
2946
2947         if ((stcb == NULL) ||
2948             (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
2949             sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) {
2950                 /* event not enabled */
2951                 return;
2952         }
2953         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
2954                 length = sizeof(struct sctp_send_failed_event);
2955         } else {
2956                 length = sizeof(struct sctp_send_failed);
2957         }
2958         m_notify = sctp_get_mbuf_for_msg(length, 0, M_NOWAIT, 1, MT_DATA);
2959         if (m_notify == NULL) {
2960                 /* no space left */
2961                 return;
2962         }
2963         SCTP_BUF_LEN(m_notify) = 0;
2964         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
2965                 ssfe = mtod(m_notify, struct sctp_send_failed_event *);
2966                 memset(ssfe, 0, length);
2967                 ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
2968                 ssfe->ssfe_flags = SCTP_DATA_UNSENT;
2969                 length += sp->length;
2970                 ssfe->ssfe_length = length;
2971                 ssfe->ssfe_error = error;
2972                 /* not exactly what the user sent in, but should be close :) */
2973                 ssfe->ssfe_info.snd_sid = sp->stream;
2974                 if (sp->some_taken) {
2975                         ssfe->ssfe_info.snd_flags = SCTP_DATA_LAST_FRAG;
2976                 } else {
2977                         ssfe->ssfe_info.snd_flags = SCTP_DATA_NOT_FRAG;
2978                 }
2979                 ssfe->ssfe_info.snd_ppid = sp->ppid;
2980                 ssfe->ssfe_info.snd_context = sp->context;
2981                 ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
2982                 ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
2983                 SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_send_failed_event);
2984         } else {
2985                 ssf = mtod(m_notify, struct sctp_send_failed *);
2986                 memset(ssf, 0, length);
2987                 ssf->ssf_type = SCTP_SEND_FAILED;
2988                 ssf->ssf_flags = SCTP_DATA_UNSENT;
2989                 length += sp->length;
2990                 ssf->ssf_length = length;
2991                 ssf->ssf_error = error;
2992                 /* not exactly what the user sent in, but should be close :) */
2993                 ssf->ssf_info.sinfo_stream = sp->stream;
2994                 ssf->ssf_info.sinfo_ssn = 0;
2995                 if (sp->some_taken) {
2996                         ssf->ssf_info.sinfo_flags = SCTP_DATA_LAST_FRAG;
2997                 } else {
2998                         ssf->ssf_info.sinfo_flags = SCTP_DATA_NOT_FRAG;
2999                 }
3000                 ssf->ssf_info.sinfo_ppid = sp->ppid;
3001                 ssf->ssf_info.sinfo_context = sp->context;
3002                 ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb);
3003                 ssf->ssf_assoc_id = sctp_get_associd(stcb);
3004                 SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_send_failed);
3005         }
3006         SCTP_BUF_NEXT(m_notify) = sp->data;
3007
3008         /* Steal off the mbuf */
3009         sp->data = NULL;
3010         /*
3011          * For this case, we check the actual socket buffer, since the assoc
3012          * is going away we don't want to overfill the socket buffer for a
3013          * non-reader
3014          */
3015         if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
3016                 sctp_m_freem(m_notify);
3017                 return;
3018         }
3019         /* append to socket */
3020         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3021             0, 0, stcb->asoc.context, 0, 0, 0,
3022             m_notify);
3023         if (control == NULL) {
3024                 /* no memory */
3025                 sctp_m_freem(m_notify);
3026                 return;
3027         }
3028         control->spec_flags = M_NOTIFICATION;
3029         sctp_add_to_readq(stcb->sctp_ep, stcb,
3030             control,
3031             &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, so_locked);
3032 }
3033
3034
3035
3036 static void
3037 sctp_notify_adaptation_layer(struct sctp_tcb *stcb)
3038 {
3039         struct mbuf *m_notify;
3040         struct sctp_adaptation_event *sai;
3041         struct sctp_queued_to_read *control;
3042
3043         if ((stcb == NULL) ||
3044             sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ADAPTATIONEVNT)) {
3045                 /* event not enabled */
3046                 return;
3047         }
3048         m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_adaption_event), 0, M_NOWAIT, 1, MT_DATA);
3049         if (m_notify == NULL)
3050                 /* no space left */
3051                 return;
3052         SCTP_BUF_LEN(m_notify) = 0;
3053         sai = mtod(m_notify, struct sctp_adaptation_event *);
3054         memset(sai, 0, sizeof(struct sctp_adaptation_event));
3055         sai->sai_type = SCTP_ADAPTATION_INDICATION;
3056         sai->sai_flags = 0;
3057         sai->sai_length = sizeof(struct sctp_adaptation_event);
3058         sai->sai_adaptation_ind = stcb->asoc.peers_adaptation;
3059         sai->sai_assoc_id = sctp_get_associd(stcb);
3060
3061         SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_adaptation_event);
3062         SCTP_BUF_NEXT(m_notify) = NULL;
3063
3064         /* append to socket */
3065         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3066             0, 0, stcb->asoc.context, 0, 0, 0,
3067             m_notify);
3068         if (control == NULL) {
3069                 /* no memory */
3070                 sctp_m_freem(m_notify);
3071                 return;
3072         }
3073         control->length = SCTP_BUF_LEN(m_notify);
3074         control->spec_flags = M_NOTIFICATION;
3075         /* not that we need this */
3076         control->tail_mbuf = m_notify;
3077         sctp_add_to_readq(stcb->sctp_ep, stcb,
3078             control,
3079             &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
3080 }
3081
3082 /* This always must be called with the read-queue LOCKED in the INP */
3083 static void
3084 sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb, uint32_t error,
3085     uint32_t val, int so_locked
3086 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3087     SCTP_UNUSED
3088 #endif
3089 )
3090 {
3091         struct mbuf *m_notify;
3092         struct sctp_pdapi_event *pdapi;
3093         struct sctp_queued_to_read *control;
3094         struct sockbuf *sb;
3095
3096         if ((stcb == NULL) ||
3097             sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3098                 /* event not enabled */
3099                 return;
3100         }
3101         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) {
3102                 return;
3103         }
3104         m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_pdapi_event), 0, M_NOWAIT, 1, MT_DATA);
3105         if (m_notify == NULL)
3106                 /* no space left */
3107                 return;
3108         SCTP_BUF_LEN(m_notify) = 0;
3109         pdapi = mtod(m_notify, struct sctp_pdapi_event *);
3110         memset(pdapi, 0, sizeof(struct sctp_pdapi_event));
3111         pdapi->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT;
3112         pdapi->pdapi_flags = 0;
3113         pdapi->pdapi_length = sizeof(struct sctp_pdapi_event);
3114         pdapi->pdapi_indication = error;
3115         pdapi->pdapi_stream = (val >> 16);
3116         pdapi->pdapi_seq = (val & 0x0000ffff);
3117         pdapi->pdapi_assoc_id = sctp_get_associd(stcb);
3118
3119         SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_pdapi_event);
3120         SCTP_BUF_NEXT(m_notify) = NULL;
3121         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3122             0, 0, stcb->asoc.context, 0, 0, 0,
3123             m_notify);
3124         if (control == NULL) {
3125                 /* no memory */
3126                 sctp_m_freem(m_notify);
3127                 return;
3128         }
3129         control->spec_flags = M_NOTIFICATION;
3130         control->length = SCTP_BUF_LEN(m_notify);
3131         /* not that we need this */
3132         control->tail_mbuf = m_notify;
3133         control->held_length = 0;
3134         control->length = 0;
3135         sb = &stcb->sctp_socket->so_rcv;
3136         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
3137                 sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m_notify));
3138         }
3139         sctp_sballoc(stcb, sb, m_notify);
3140         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
3141                 sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
3142         }
3143         atomic_add_int(&control->length, SCTP_BUF_LEN(m_notify));
3144         control->end_added = 1;
3145         if (stcb->asoc.control_pdapi)
3146                 TAILQ_INSERT_AFTER(&stcb->sctp_ep->read_queue, stcb->asoc.control_pdapi, control, next);
3147         else {
3148                 /* we really should not see this case */
3149                 TAILQ_INSERT_TAIL(&stcb->sctp_ep->read_queue, control, next);
3150         }
3151         if (stcb->sctp_ep && stcb->sctp_socket) {
3152                 /* This should always be the case */
3153 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3154                 struct socket *so;
3155
3156                 so = SCTP_INP_SO(stcb->sctp_ep);
3157                 if (!so_locked) {
3158                         atomic_add_int(&stcb->asoc.refcnt, 1);
3159                         SCTP_TCB_UNLOCK(stcb);
3160                         SCTP_SOCKET_LOCK(so, 1);
3161                         SCTP_TCB_LOCK(stcb);
3162                         atomic_subtract_int(&stcb->asoc.refcnt, 1);
3163                         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3164                                 SCTP_SOCKET_UNLOCK(so, 1);
3165                                 return;
3166                         }
3167                 }
3168 #endif
3169                 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
3170 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3171                 if (!so_locked) {
3172                         SCTP_SOCKET_UNLOCK(so, 1);
3173                 }
3174 #endif
3175         }
3176 }
3177
3178 static void
3179 sctp_notify_shutdown_event(struct sctp_tcb *stcb)
3180 {
3181         struct mbuf *m_notify;
3182         struct sctp_shutdown_event *sse;
3183         struct sctp_queued_to_read *control;
3184
3185         /*
3186          * For TCP model AND UDP connected sockets we will send an error up
3187          * when an SHUTDOWN completes
3188          */
3189         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3190             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3191                 /* mark socket closed for read/write and wakeup! */
3192 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3193                 struct socket *so;
3194
3195                 so = SCTP_INP_SO(stcb->sctp_ep);
3196                 atomic_add_int(&stcb->asoc.refcnt, 1);
3197                 SCTP_TCB_UNLOCK(stcb);
3198                 SCTP_SOCKET_LOCK(so, 1);
3199                 SCTP_TCB_LOCK(stcb);
3200                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3201                 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
3202                         SCTP_SOCKET_UNLOCK(so, 1);
3203                         return;
3204                 }
3205 #endif
3206                 socantsendmore(stcb->sctp_socket);
3207 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3208                 SCTP_SOCKET_UNLOCK(so, 1);
3209 #endif
3210         }
3211         if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT)) {
3212                 /* event not enabled */
3213                 return;
3214         }
3215         m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_event), 0, M_NOWAIT, 1, MT_DATA);
3216         if (m_notify == NULL)
3217                 /* no space left */
3218                 return;
3219         sse = mtod(m_notify, struct sctp_shutdown_event *);
3220         memset(sse, 0, sizeof(struct sctp_shutdown_event));
3221         sse->sse_type = SCTP_SHUTDOWN_EVENT;
3222         sse->sse_flags = 0;
3223         sse->sse_length = sizeof(struct sctp_shutdown_event);
3224         sse->sse_assoc_id = sctp_get_associd(stcb);
3225
3226         SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_shutdown_event);
3227         SCTP_BUF_NEXT(m_notify) = NULL;
3228
3229         /* append to socket */
3230         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3231             0, 0, stcb->asoc.context, 0, 0, 0,
3232             m_notify);
3233         if (control == NULL) {
3234                 /* no memory */
3235                 sctp_m_freem(m_notify);
3236                 return;
3237         }
3238         control->spec_flags = M_NOTIFICATION;
3239         control->length = SCTP_BUF_LEN(m_notify);
3240         /* not that we need this */
3241         control->tail_mbuf = m_notify;
3242         sctp_add_to_readq(stcb->sctp_ep, stcb,
3243             control,
3244             &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
3245 }
3246
3247 static void
3248 sctp_notify_sender_dry_event(struct sctp_tcb *stcb,
3249     int so_locked
3250 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3251     SCTP_UNUSED
3252 #endif
3253 )
3254 {
3255         struct mbuf *m_notify;
3256         struct sctp_sender_dry_event *event;
3257         struct sctp_queued_to_read *control;
3258
3259         if ((stcb == NULL) ||
3260             sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DRYEVNT)) {
3261                 /* event not enabled */
3262                 return;
3263         }
3264         m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_sender_dry_event), 0, M_NOWAIT, 1, MT_DATA);
3265         if (m_notify == NULL) {
3266                 /* no space left */
3267                 return;
3268         }
3269         SCTP_BUF_LEN(m_notify) = 0;
3270         event = mtod(m_notify, struct sctp_sender_dry_event *);
3271         memset(event, 0, sizeof(struct sctp_sender_dry_event));
3272         event->sender_dry_type = SCTP_SENDER_DRY_EVENT;
3273         event->sender_dry_flags = 0;
3274         event->sender_dry_length = sizeof(struct sctp_sender_dry_event);
3275         event->sender_dry_assoc_id = sctp_get_associd(stcb);
3276
3277         SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_sender_dry_event);
3278         SCTP_BUF_NEXT(m_notify) = NULL;
3279
3280         /* append to socket */
3281         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3282             0, 0, stcb->asoc.context, 0, 0, 0,
3283             m_notify);
3284         if (control == NULL) {
3285                 /* no memory */
3286                 sctp_m_freem(m_notify);
3287                 return;
3288         }
3289         control->length = SCTP_BUF_LEN(m_notify);
3290         control->spec_flags = M_NOTIFICATION;
3291         /* not that we need this */
3292         control->tail_mbuf = m_notify;
3293         sctp_add_to_readq(stcb->sctp_ep, stcb, control,
3294             &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, so_locked);
3295 }
3296
3297
3298 void
3299 sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin, uint16_t numberout, int flag)
3300 {
3301         struct mbuf *m_notify;
3302         struct sctp_queued_to_read *control;
3303         struct sctp_stream_change_event *stradd;
3304
3305         if ((stcb == NULL) ||
3306             (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_CHANGEEVNT))) {
3307                 /* event not enabled */
3308                 return;
3309         }
3310         if ((stcb->asoc.peer_req_out) && flag) {
3311                 /* Peer made the request, don't tell the local user */
3312                 stcb->asoc.peer_req_out = 0;
3313                 return;
3314         }
3315         stcb->asoc.peer_req_out = 0;
3316         m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_stream_change_event), 0, M_NOWAIT, 1, MT_DATA);
3317         if (m_notify == NULL)
3318                 /* no space left */
3319                 return;
3320         SCTP_BUF_LEN(m_notify) = 0;
3321         stradd = mtod(m_notify, struct sctp_stream_change_event *);
3322         memset(stradd, 0, sizeof(struct sctp_stream_change_event));
3323         stradd->strchange_type = SCTP_STREAM_CHANGE_EVENT;
3324         stradd->strchange_flags = flag;
3325         stradd->strchange_length = sizeof(struct sctp_stream_change_event);
3326         stradd->strchange_assoc_id = sctp_get_associd(stcb);
3327         stradd->strchange_instrms = numberin;
3328         stradd->strchange_outstrms = numberout;
3329         SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_stream_change_event);
3330         SCTP_BUF_NEXT(m_notify) = NULL;
3331         if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
3332                 /* no space */
3333                 sctp_m_freem(m_notify);
3334                 return;
3335         }
3336         /* append to socket */
3337         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3338             0, 0, stcb->asoc.context, 0, 0, 0,
3339             m_notify);
3340         if (control == NULL) {
3341                 /* no memory */
3342                 sctp_m_freem(m_notify);
3343                 return;
3344         }
3345         control->spec_flags = M_NOTIFICATION;
3346         control->length = SCTP_BUF_LEN(m_notify);
3347         /* not that we need this */
3348         control->tail_mbuf = m_notify;
3349         sctp_add_to_readq(stcb->sctp_ep, stcb,
3350             control,
3351             &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
3352 }
3353
3354 void
3355 sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag)
3356 {
3357         struct mbuf *m_notify;
3358         struct sctp_queued_to_read *control;
3359         struct sctp_assoc_reset_event *strasoc;
3360
3361         if ((stcb == NULL) ||
3362             (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ASSOC_RESETEVNT))) {
3363                 /* event not enabled */
3364                 return;
3365         }
3366         m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_assoc_reset_event), 0, M_NOWAIT, 1, MT_DATA);
3367         if (m_notify == NULL)
3368                 /* no space left */
3369                 return;
3370         SCTP_BUF_LEN(m_notify) = 0;
3371         strasoc = mtod(m_notify, struct sctp_assoc_reset_event *);
3372         memset(strasoc, 0, sizeof(struct sctp_assoc_reset_event));
3373         strasoc->assocreset_type = SCTP_ASSOC_RESET_EVENT;
3374         strasoc->assocreset_flags = flag;
3375         strasoc->assocreset_length = sizeof(struct sctp_assoc_reset_event);
3376         strasoc->assocreset_assoc_id = sctp_get_associd(stcb);
3377         strasoc->assocreset_local_tsn = sending_tsn;
3378         strasoc->assocreset_remote_tsn = recv_tsn;
3379         SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_assoc_reset_event);
3380         SCTP_BUF_NEXT(m_notify) = NULL;
3381         if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
3382                 /* no space */
3383                 sctp_m_freem(m_notify);
3384                 return;
3385         }
3386         /* append to socket */
3387         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3388             0, 0, stcb->asoc.context, 0, 0, 0,
3389             m_notify);
3390         if (control == NULL) {
3391                 /* no memory */
3392                 sctp_m_freem(m_notify);
3393                 return;
3394         }
3395         control->spec_flags = M_NOTIFICATION;
3396         control->length = SCTP_BUF_LEN(m_notify);
3397         /* not that we need this */
3398         control->tail_mbuf = m_notify;
3399         sctp_add_to_readq(stcb->sctp_ep, stcb,
3400             control,
3401             &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
3402 }
3403
3404
3405
3406 static void
3407 sctp_notify_stream_reset(struct sctp_tcb *stcb,
3408     int number_entries, uint16_t * list, int flag)
3409 {
3410         struct mbuf *m_notify;
3411         struct sctp_queued_to_read *control;
3412         struct sctp_stream_reset_event *strreset;
3413         int len;
3414
3415         if ((stcb == NULL) ||
3416             (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_RESETEVNT))) {
3417                 /* event not enabled */
3418                 return;
3419         }
3420         m_notify = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
3421         if (m_notify == NULL)
3422                 /* no space left */
3423                 return;
3424         SCTP_BUF_LEN(m_notify) = 0;
3425         len = sizeof(struct sctp_stream_reset_event) + (number_entries * sizeof(uint16_t));
3426         if (len > M_TRAILINGSPACE(m_notify)) {
3427                 /* never enough room */
3428                 sctp_m_freem(m_notify);
3429                 return;
3430         }
3431         strreset = mtod(m_notify, struct sctp_stream_reset_event *);
3432         memset(strreset, 0, len);
3433         strreset->strreset_type = SCTP_STREAM_RESET_EVENT;
3434         strreset->strreset_flags = flag;
3435         strreset->strreset_length = len;
3436         strreset->strreset_assoc_id = sctp_get_associd(stcb);
3437         if (number_entries) {
3438                 int i;
3439
3440                 for (i = 0; i < number_entries; i++) {
3441                         strreset->strreset_stream_list[i] = ntohs(list[i]);
3442                 }
3443         }
3444         SCTP_BUF_LEN(m_notify) = len;
3445         SCTP_BUF_NEXT(m_notify) = NULL;
3446         if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
3447                 /* no space */
3448                 sctp_m_freem(m_notify);
3449                 return;
3450         }
3451         /* append to socket */
3452         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3453             0, 0, stcb->asoc.context, 0, 0, 0,
3454             m_notify);
3455         if (control == NULL) {
3456                 /* no memory */
3457                 sctp_m_freem(m_notify);
3458                 return;
3459         }
3460         control->spec_flags = M_NOTIFICATION;
3461         control->length = SCTP_BUF_LEN(m_notify);
3462         /* not that we need this */
3463         control->tail_mbuf = m_notify;
3464         sctp_add_to_readq(stcb->sctp_ep, stcb,
3465             control,
3466             &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
3467 }
3468
3469
3470 static void
3471 sctp_notify_remote_error(struct sctp_tcb *stcb, uint16_t error, struct sctp_error_chunk *chunk)
3472 {
3473         struct mbuf *m_notify;
3474         struct sctp_remote_error *sre;
3475         struct sctp_queued_to_read *control;
3476         size_t notif_len, chunk_len;
3477
3478         if ((stcb == NULL) ||
3479             sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPEERERR)) {
3480                 return;
3481         }
3482         if (chunk != NULL) {
3483                 chunk_len = ntohs(chunk->ch.chunk_length);
3484         } else {
3485                 chunk_len = 0;
3486         }
3487         notif_len = sizeof(struct sctp_remote_error) + chunk_len;
3488         m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
3489         if (m_notify == NULL) {
3490                 /* Retry with smaller value. */
3491                 notif_len = sizeof(struct sctp_remote_error);
3492                 m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
3493                 if (m_notify == NULL) {
3494                         return;
3495                 }
3496         }
3497         SCTP_BUF_NEXT(m_notify) = NULL;
3498         sre = mtod(m_notify, struct sctp_remote_error *);
3499         memset(sre, 0, notif_len);
3500         sre->sre_type = SCTP_REMOTE_ERROR;
3501         sre->sre_flags = 0;
3502         sre->sre_length = sizeof(struct sctp_remote_error);
3503         sre->sre_error = error;
3504         sre->sre_assoc_id = sctp_get_associd(stcb);
3505         if (notif_len > sizeof(struct sctp_remote_error)) {
3506                 memcpy(sre->sre_data, chunk, chunk_len);
3507                 sre->sre_length += chunk_len;
3508         }
3509         SCTP_BUF_LEN(m_notify) = sre->sre_length;
3510         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
3511             0, 0, stcb->asoc.context, 0, 0, 0,
3512             m_notify);
3513         if (control != NULL) {
3514                 control->length = SCTP_BUF_LEN(m_notify);
3515                 /* not that we need this */
3516                 control->tail_mbuf = m_notify;
3517                 control->spec_flags = M_NOTIFICATION;
3518                 sctp_add_to_readq(stcb->sctp_ep, stcb,
3519                     control,
3520                     &stcb->sctp_socket->so_rcv, 1,
3521                     SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
3522         } else {
3523                 sctp_m_freem(m_notify);
3524         }
3525 }
3526
3527
3528 void
3529 sctp_ulp_notify(uint32_t notification, struct sctp_tcb *stcb,
3530     uint32_t error, void *data, int so_locked
3531 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3532     SCTP_UNUSED
3533 #endif
3534 )
3535 {
3536         if ((stcb == NULL) ||
3537             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
3538             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3539             (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) {
3540                 /* If the socket is gone we are out of here */
3541                 return;
3542         }
3543         if (stcb->sctp_socket->so_rcv.sb_state & SBS_CANTRCVMORE) {
3544                 return;
3545         }
3546         if ((stcb->asoc.state & SCTP_STATE_COOKIE_WAIT) ||
3547             (stcb->asoc.state & SCTP_STATE_COOKIE_ECHOED)) {
3548                 if ((notification == SCTP_NOTIFY_INTERFACE_DOWN) ||
3549                     (notification == SCTP_NOTIFY_INTERFACE_UP) ||
3550                     (notification == SCTP_NOTIFY_INTERFACE_CONFIRMED)) {
3551                         /* Don't report these in front states */
3552                         return;
3553                 }
3554         }
3555         switch (notification) {
3556         case SCTP_NOTIFY_ASSOC_UP:
3557                 if (stcb->asoc.assoc_up_sent == 0) {
3558                         sctp_notify_assoc_change(SCTP_COMM_UP, stcb, error, NULL, 0, so_locked);
3559                         stcb->asoc.assoc_up_sent = 1;
3560                 }
3561                 if (stcb->asoc.adaptation_needed && (stcb->asoc.adaptation_sent == 0)) {
3562                         sctp_notify_adaptation_layer(stcb);
3563                 }
3564                 if (stcb->asoc.auth_supported == 0) {
3565                         sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0,
3566                             NULL, so_locked);
3567                 }
3568                 break;
3569         case SCTP_NOTIFY_ASSOC_DOWN:
3570                 sctp_notify_assoc_change(SCTP_SHUTDOWN_COMP, stcb, error, NULL, 0, so_locked);
3571                 break;
3572         case SCTP_NOTIFY_INTERFACE_DOWN:
3573                 {
3574                         struct sctp_nets *net;
3575
3576                         net = (struct sctp_nets *)data;
3577                         sctp_notify_peer_addr_change(stcb, SCTP_ADDR_UNREACHABLE,
3578                             (struct sockaddr *)&net->ro._l_addr, error);
3579                         break;
3580                 }
3581         case SCTP_NOTIFY_INTERFACE_UP:
3582                 {
3583                         struct sctp_nets *net;
3584
3585                         net = (struct sctp_nets *)data;
3586                         sctp_notify_peer_addr_change(stcb, SCTP_ADDR_AVAILABLE,
3587                             (struct sockaddr *)&net->ro._l_addr, error);
3588                         break;
3589                 }
3590         case SCTP_NOTIFY_INTERFACE_CONFIRMED:
3591                 {
3592                         struct sctp_nets *net;
3593
3594                         net = (struct sctp_nets *)data;
3595                         sctp_notify_peer_addr_change(stcb, SCTP_ADDR_CONFIRMED,
3596                             (struct sockaddr *)&net->ro._l_addr, error);
3597                         break;
3598                 }
3599         case SCTP_NOTIFY_SPECIAL_SP_FAIL:
3600                 sctp_notify_send_failed2(stcb, error,
3601                     (struct sctp_stream_queue_pending *)data, so_locked);
3602                 break;
3603         case SCTP_NOTIFY_SENT_DG_FAIL:
3604                 sctp_notify_send_failed(stcb, 1, error,
3605                     (struct sctp_tmit_chunk *)data, so_locked);
3606                 break;
3607         case SCTP_NOTIFY_UNSENT_DG_FAIL:
3608                 sctp_notify_send_failed(stcb, 0, error,
3609                     (struct sctp_tmit_chunk *)data, so_locked);
3610                 break;
3611         case SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION:
3612                 {
3613                         uint32_t val;
3614
3615                         val = *((uint32_t *) data);
3616
3617                         sctp_notify_partial_delivery_indication(stcb, error, val, so_locked);
3618                         break;
3619                 }
3620         case SCTP_NOTIFY_ASSOC_LOC_ABORTED:
3621                 if (((stcb->asoc.state & SCTP_STATE_MASK) == SCTP_STATE_COOKIE_WAIT) ||
3622                     ((stcb->asoc.state & SCTP_STATE_MASK) == SCTP_STATE_COOKIE_ECHOED)) {
3623                         sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, 0, so_locked);
3624                 } else {
3625                         sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, 0, so_locked);
3626                 }
3627                 break;
3628         case SCTP_NOTIFY_ASSOC_REM_ABORTED:
3629                 if (((stcb->asoc.state & SCTP_STATE_MASK) == SCTP_STATE_COOKIE_WAIT) ||
3630                     ((stcb->asoc.state & SCTP_STATE_MASK) == SCTP_STATE_COOKIE_ECHOED)) {
3631                         sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, 1, so_locked);
3632                 } else {
3633                         sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, 1, so_locked);
3634                 }
3635                 break;
3636         case SCTP_NOTIFY_ASSOC_RESTART:
3637                 sctp_notify_assoc_change(SCTP_RESTART, stcb, error, NULL, 0, so_locked);
3638                 if (stcb->asoc.auth_supported == 0) {
3639                         sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0,
3640                             NULL, so_locked);
3641                 }
3642                 break;
3643         case SCTP_NOTIFY_STR_RESET_SEND:
3644                 sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_OUTGOING_SSN);
3645                 break;
3646         case SCTP_NOTIFY_STR_RESET_RECV:
3647                 sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_INCOMING);
3648                 break;
3649         case SCTP_NOTIFY_STR_RESET_FAILED_OUT:
3650                 sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
3651                     (SCTP_STREAM_RESET_OUTGOING_SSN | SCTP_STREAM_RESET_FAILED));
3652                 break;
3653         case SCTP_NOTIFY_STR_RESET_DENIED_OUT:
3654                 sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
3655                     (SCTP_STREAM_RESET_OUTGOING_SSN | SCTP_STREAM_RESET_DENIED));
3656                 break;
3657         case SCTP_NOTIFY_STR_RESET_FAILED_IN:
3658                 sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
3659                     (SCTP_STREAM_RESET_INCOMING | SCTP_STREAM_RESET_FAILED));
3660                 break;
3661         case SCTP_NOTIFY_STR_RESET_DENIED_IN:
3662                 sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
3663                     (SCTP_STREAM_RESET_INCOMING | SCTP_STREAM_RESET_DENIED));
3664                 break;
3665         case SCTP_NOTIFY_ASCONF_ADD_IP:
3666                 sctp_notify_peer_addr_change(stcb, SCTP_ADDR_ADDED, data,
3667                     error);
3668                 break;
3669         case SCTP_NOTIFY_ASCONF_DELETE_IP:
3670                 sctp_notify_peer_addr_change(stcb, SCTP_ADDR_REMOVED, data,
3671                     error);
3672                 break;
3673         case SCTP_NOTIFY_ASCONF_SET_PRIMARY:
3674                 sctp_notify_peer_addr_change(stcb, SCTP_ADDR_MADE_PRIM, data,
3675                     error);
3676                 break;
3677         case SCTP_NOTIFY_PEER_SHUTDOWN:
3678                 sctp_notify_shutdown_event(stcb);
3679                 break;
3680         case SCTP_NOTIFY_AUTH_NEW_KEY:
3681                 sctp_notify_authentication(stcb, SCTP_AUTH_NEW_KEY, error,
3682                     (uint16_t) (uintptr_t) data,
3683                     so_locked);
3684                 break;
3685         case SCTP_NOTIFY_AUTH_FREE_KEY:
3686                 sctp_notify_authentication(stcb, SCTP_AUTH_FREE_KEY, error,
3687                     (uint16_t) (uintptr_t) data,
3688                     so_locked);
3689                 break;
3690         case SCTP_NOTIFY_NO_PEER_AUTH:
3691                 sctp_notify_authentication(stcb, SCTP_AUTH_NO_AUTH, error,
3692                     (uint16_t) (uintptr_t) data,
3693                     so_locked);
3694                 break;
3695         case SCTP_NOTIFY_SENDER_DRY:
3696                 sctp_notify_sender_dry_event(stcb, so_locked);
3697                 break;
3698         case SCTP_NOTIFY_REMOTE_ERROR:
3699                 sctp_notify_remote_error(stcb, error, data);
3700                 break;
3701         default:
3702                 SCTPDBG(SCTP_DEBUG_UTIL1, "%s: unknown notification %xh (%u)\n",
3703                     __FUNCTION__, notification, notification);
3704                 break;
3705         }                       /* end switch */
3706 }
3707
3708 void
3709 sctp_report_all_outbound(struct sctp_tcb *stcb, uint16_t error, int holds_lock, int so_locked
3710 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3711     SCTP_UNUSED
3712 #endif
3713 )
3714 {
3715         struct sctp_association *asoc;
3716         struct sctp_stream_out *outs;
3717         struct sctp_tmit_chunk *chk, *nchk;
3718         struct sctp_stream_queue_pending *sp, *nsp;
3719         int i;
3720
3721         if (stcb == NULL) {
3722                 return;
3723         }
3724         asoc = &stcb->asoc;
3725         if (asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3726                 /* already being freed */
3727                 return;
3728         }
3729         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
3730             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3731             (asoc->state & SCTP_STATE_CLOSED_SOCKET)) {
3732                 return;
3733         }
3734         /* now through all the gunk freeing chunks */
3735         if (holds_lock == 0) {
3736                 SCTP_TCB_SEND_LOCK(stcb);
3737         }
3738         /* sent queue SHOULD be empty */
3739         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
3740                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3741                 asoc->sent_queue_cnt--;
3742                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
3743                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
3744                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
3745 #ifdef INVARIANTS
3746                         } else {
3747                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
3748 #endif
3749                         }
3750                 }
3751                 if (chk->data != NULL) {
3752                         sctp_free_bufspace(stcb, asoc, chk, 1);
3753                         sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
3754                             error, chk, so_locked);
3755                         if (chk->data) {
3756                                 sctp_m_freem(chk->data);
3757                                 chk->data = NULL;
3758                         }
3759                 }
3760                 sctp_free_a_chunk(stcb, chk, so_locked);
3761                 /* sa_ignore FREED_MEMORY */
3762         }
3763         /* pending send queue SHOULD be empty */
3764         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
3765                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3766                 asoc->send_queue_cnt--;
3767                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
3768                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
3769 #ifdef INVARIANTS
3770                 } else {
3771                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
3772 #endif
3773                 }
3774                 if (chk->data != NULL) {
3775                         sctp_free_bufspace(stcb, asoc, chk, 1);
3776                         sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
3777                             error, chk, so_locked);
3778                         if (chk->data) {
3779                                 sctp_m_freem(chk->data);
3780                                 chk->data = NULL;
3781                         }
3782                 }
3783                 sctp_free_a_chunk(stcb, chk, so_locked);
3784                 /* sa_ignore FREED_MEMORY */
3785         }
3786         for (i = 0; i < asoc->streamoutcnt; i++) {
3787                 /* For each stream */
3788                 outs = &asoc->strmout[i];
3789                 /* clean up any sends there */
3790                 asoc->locked_on_sending = NULL;
3791                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
3792                         asoc->stream_queue_cnt--;
3793                         TAILQ_REMOVE(&outs->outqueue, sp, next);
3794                         sctp_free_spbufspace(stcb, asoc, sp);
3795                         if (sp->data) {
3796                                 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
3797                                     error, (void *)sp, so_locked);
3798                                 if (sp->data) {
3799                                         sctp_m_freem(sp->data);
3800                                         sp->data = NULL;
3801                                         sp->tail_mbuf = NULL;
3802                                         sp->length = 0;
3803                                 }
3804                         }
3805                         if (sp->net) {
3806                                 sctp_free_remote_addr(sp->net);
3807                                 sp->net = NULL;
3808                         }
3809                         /* Free the chunk */
3810                         sctp_free_a_strmoq(stcb, sp, so_locked);
3811                         /* sa_ignore FREED_MEMORY */
3812                 }
3813         }
3814
3815         if (holds_lock == 0) {
3816                 SCTP_TCB_SEND_UNLOCK(stcb);
3817         }
3818 }
3819
3820 void
3821 sctp_abort_notification(struct sctp_tcb *stcb, uint8_t from_peer, uint16_t error,
3822     struct sctp_abort_chunk *abort, int so_locked
3823 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3824     SCTP_UNUSED
3825 #endif
3826 )
3827 {
3828         if (stcb == NULL) {
3829                 return;
3830         }
3831         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
3832             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
3833             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
3834                 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_WAS_ABORTED;
3835         }
3836         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
3837             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3838             (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) {
3839                 return;
3840         }
3841         /* Tell them we lost the asoc */
3842         sctp_report_all_outbound(stcb, error, 1, so_locked);
3843         if (from_peer) {
3844                 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_REM_ABORTED, stcb, error, abort, so_locked);
3845         } else {
3846                 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_LOC_ABORTED, stcb, error, abort, so_locked);
3847         }
3848 }
3849
3850 void
3851 sctp_abort_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
3852     struct mbuf *m, int iphlen,
3853     struct sockaddr *src, struct sockaddr *dst,
3854     struct sctphdr *sh, struct mbuf *op_err,
3855     uint8_t mflowtype, uint32_t mflowid,
3856     uint32_t vrf_id, uint16_t port)
3857 {
3858         uint32_t vtag;
3859
3860 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3861         struct socket *so;
3862
3863 #endif
3864
3865         vtag = 0;
3866         if (stcb != NULL) {
3867                 /* We have a TCB to abort, send notification too */
3868                 vtag = stcb->asoc.peer_vtag;
3869                 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
3870                 /* get the assoc vrf id and table id */
3871                 vrf_id = stcb->asoc.vrf_id;
3872                 stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
3873         }
3874         sctp_send_abort(m, iphlen, src, dst, sh, vtag, op_err,
3875             mflowtype, mflowid,
3876             vrf_id, port);
3877         if (stcb != NULL) {
3878                 /* Ok, now lets free it */
3879 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3880                 so = SCTP_INP_SO(inp);
3881                 atomic_add_int(&stcb->asoc.refcnt, 1);
3882                 SCTP_TCB_UNLOCK(stcb);
3883                 SCTP_SOCKET_LOCK(so, 1);
3884                 SCTP_TCB_LOCK(stcb);
3885                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3886 #endif
3887                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3888                 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
3889                     (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3890                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3891                 }
3892                 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTPUTIL + SCTP_LOC_4);
3893 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3894                 SCTP_SOCKET_UNLOCK(so, 1);
3895 #endif
3896         }
3897 }
3898
3899 #ifdef SCTP_ASOCLOG_OF_TSNS
3900 void
3901 sctp_print_out_track_log(struct sctp_tcb *stcb)
3902 {
3903 #ifdef NOSIY_PRINTS
3904         int i;
3905
3906         SCTP_PRINTF("Last ep reason:%x\n", stcb->sctp_ep->last_abort_code);
3907         SCTP_PRINTF("IN bound TSN log-aaa\n");
3908         if ((stcb->asoc.tsn_in_at == 0) && (stcb->asoc.tsn_in_wrapped == 0)) {
3909                 SCTP_PRINTF("None rcvd\n");
3910                 goto none_in;
3911         }
3912         if (stcb->asoc.tsn_in_wrapped) {
3913                 for (i = stcb->asoc.tsn_in_at; i < SCTP_TSN_LOG_SIZE; i++) {
3914                         SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
3915                             stcb->asoc.in_tsnlog[i].tsn,
3916                             stcb->asoc.in_tsnlog[i].strm,
3917                             stcb->asoc.in_tsnlog[i].seq,
3918                             stcb->asoc.in_tsnlog[i].flgs,
3919                             stcb->asoc.in_tsnlog[i].sz);
3920                 }
3921         }
3922         if (stcb->asoc.tsn_in_at) {
3923                 for (i = 0; i < stcb->asoc.tsn_in_at; i++) {
3924                         SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
3925                             stcb->asoc.in_tsnlog[i].tsn,
3926                             stcb->asoc.in_tsnlog[i].strm,
3927                             stcb->asoc.in_tsnlog[i].seq,
3928                             stcb->asoc.in_tsnlog[i].flgs,
3929                             stcb->asoc.in_tsnlog[i].sz);
3930                 }
3931         }
3932 none_in:
3933         SCTP_PRINTF("OUT bound TSN log-aaa\n");
3934         if ((stcb->asoc.tsn_out_at == 0) &&
3935             (stcb->asoc.tsn_out_wrapped == 0)) {
3936                 SCTP_PRINTF("None sent\n");
3937         }
3938         if (stcb->asoc.tsn_out_wrapped) {
3939                 for (i = stcb->asoc.tsn_out_at; i < SCTP_TSN_LOG_SIZE; i++) {
3940                         SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
3941                             stcb->asoc.out_tsnlog[i].tsn,
3942                             stcb->asoc.out_tsnlog[i].strm,
3943                             stcb->asoc.out_tsnlog[i].seq,
3944                             stcb->asoc.out_tsnlog[i].flgs,
3945                             stcb->asoc.out_tsnlog[i].sz);
3946                 }
3947         }
3948         if (stcb->asoc.tsn_out_at) {
3949                 for (i = 0; i < stcb->asoc.tsn_out_at; i++) {
3950                         SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
3951                             stcb->asoc.out_tsnlog[i].tsn,
3952                             stcb->asoc.out_tsnlog[i].strm,
3953                             stcb->asoc.out_tsnlog[i].seq,
3954                             stcb->asoc.out_tsnlog[i].flgs,
3955                             stcb->asoc.out_tsnlog[i].sz);
3956                 }
3957         }
3958 #endif
3959 }
3960
3961 #endif
3962
3963 void
3964 sctp_abort_an_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
3965     struct mbuf *op_err,
3966     int so_locked
3967 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3968     SCTP_UNUSED
3969 #endif
3970 )
3971 {
3972 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3973         struct socket *so;
3974
3975 #endif
3976
3977 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3978         so = SCTP_INP_SO(inp);
3979 #endif
3980         if (stcb == NULL) {
3981                 /* Got to have a TCB */
3982                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3983                         if (LIST_EMPTY(&inp->sctp_asoc_list)) {
3984                                 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
3985                                     SCTP_CALLED_DIRECTLY_NOCMPSET);
3986                         }
3987                 }
3988                 return;
3989         } else {
3990                 stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
3991         }
3992         /* notify the ulp */
3993         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
3994                 sctp_abort_notification(stcb, 0, 0, NULL, so_locked);
3995         }
3996         /* notify the peer */
3997         sctp_send_abort_tcb(stcb, op_err, so_locked);
3998         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3999         if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
4000             (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4001                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4002         }
4003         /* now free the asoc */
4004 #ifdef SCTP_ASOCLOG_OF_TSNS
4005         sctp_print_out_track_log(stcb);
4006 #endif
4007 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4008         if (!so_locked) {
4009                 atomic_add_int(&stcb->asoc.refcnt, 1);
4010                 SCTP_TCB_UNLOCK(stcb);
4011                 SCTP_SOCKET_LOCK(so, 1);
4012                 SCTP_TCB_LOCK(stcb);
4013                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4014         }
4015 #endif
4016         (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTPUTIL + SCTP_LOC_5);
4017 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4018         if (!so_locked) {
4019                 SCTP_SOCKET_UNLOCK(so, 1);
4020         }
4021 #endif
4022 }
4023
4024 void
4025 sctp_handle_ootb(struct mbuf *m, int iphlen, int offset,
4026     struct sockaddr *src, struct sockaddr *dst,
4027     struct sctphdr *sh, struct sctp_inpcb *inp,
4028     struct mbuf *cause,
4029     uint8_t mflowtype, uint32_t mflowid,
4030     uint32_t vrf_id, uint16_t port)
4031 {
4032         struct sctp_chunkhdr *ch, chunk_buf;
4033         unsigned int chk_length;
4034         int contains_init_chunk;
4035
4036         SCTP_STAT_INCR_COUNTER32(sctps_outoftheblue);
4037         /* Generate a TO address for future reference */
4038         if (inp && (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4039                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
4040                         sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
4041                             SCTP_CALLED_DIRECTLY_NOCMPSET);
4042                 }
4043         }
4044         contains_init_chunk = 0;
4045         ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
4046             sizeof(*ch), (uint8_t *) & chunk_buf);
4047         while (ch != NULL) {
4048                 chk_length = ntohs(ch->chunk_length);
4049                 if (chk_length < sizeof(*ch)) {
4050                         /* break to abort land */
4051                         break;
4052                 }
4053                 switch (ch->chunk_type) {
4054                 case SCTP_INIT:
4055                         contains_init_chunk = 1;
4056                         break;
4057                 case SCTP_PACKET_DROPPED:
4058                         /* we don't respond to pkt-dropped */
4059                         return;
4060                 case SCTP_ABORT_ASSOCIATION:
4061                         /* we don't respond with an ABORT to an ABORT */
4062                         return;
4063                 case SCTP_SHUTDOWN_COMPLETE:
4064                         /*
4065                          * we ignore it since we are not waiting for it and
4066                          * peer is gone
4067                          */
4068                         return;
4069                 case SCTP_SHUTDOWN_ACK:
4070                         sctp_send_shutdown_complete2(src, dst, sh,
4071                             mflowtype, mflowid,
4072                             vrf_id, port);
4073                         return;
4074                 default:
4075                         break;
4076                 }
4077                 offset += SCTP_SIZE32(chk_length);
4078                 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
4079                     sizeof(*ch), (uint8_t *) & chunk_buf);
4080         }
4081         if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
4082             ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
4083             (contains_init_chunk == 0))) {
4084                 sctp_send_abort(m, iphlen, src, dst, sh, 0, cause,
4085                     mflowtype, mflowid,
4086                     vrf_id, port);
4087         }
4088 }
4089
4090 /*
4091  * check the inbound datagram to make sure there is not an abort inside it,
4092  * if there is return 1, else return 0.
4093  */
4094 int
4095 sctp_is_there_an_abort_here(struct mbuf *m, int iphlen, uint32_t * vtagfill)
4096 {
4097         struct sctp_chunkhdr *ch;
4098         struct sctp_init_chunk *init_chk, chunk_buf;
4099         int offset;
4100         unsigned int chk_length;
4101
4102         offset = iphlen + sizeof(struct sctphdr);
4103         ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, sizeof(*ch),
4104             (uint8_t *) & chunk_buf);
4105         while (ch != NULL) {
4106                 chk_length = ntohs(ch->chunk_length);
4107                 if (chk_length < sizeof(*ch)) {
4108                         /* packet is probably corrupt */
4109                         break;
4110                 }
4111                 /* we seem to be ok, is it an abort? */
4112                 if (ch->chunk_type == SCTP_ABORT_ASSOCIATION) {
4113                         /* yep, tell them */
4114                         return (1);
4115                 }
4116                 if (ch->chunk_type == SCTP_INITIATION) {
4117                         /* need to update the Vtag */
4118                         init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m,
4119                             offset, sizeof(*init_chk), (uint8_t *) & chunk_buf);
4120                         if (init_chk != NULL) {
4121                                 *vtagfill = ntohl(init_chk->init.initiate_tag);
4122                         }
4123                 }
4124                 /* Nope, move to the next chunk */
4125                 offset += SCTP_SIZE32(chk_length);
4126                 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
4127                     sizeof(*ch), (uint8_t *) & chunk_buf);
4128         }
4129         return (0);
4130 }
4131
4132 /*
4133  * currently (2/02), ifa_addr embeds scope_id's and don't have sin6_scope_id
4134  * set (i.e. it's 0) so, create this function to compare link local scopes
4135  */
4136 #ifdef INET6
4137 uint32_t
4138 sctp_is_same_scope(struct sockaddr_in6 *addr1, struct sockaddr_in6 *addr2)
4139 {
4140         struct sockaddr_in6 a, b;
4141
4142         /* save copies */
4143         a = *addr1;
4144         b = *addr2;
4145
4146         if (a.sin6_scope_id == 0)
4147                 if (sa6_recoverscope(&a)) {
4148                         /* can't get scope, so can't match */
4149                         return (0);
4150                 }
4151         if (b.sin6_scope_id == 0)
4152                 if (sa6_recoverscope(&b)) {
4153                         /* can't get scope, so can't match */
4154                         return (0);
4155                 }
4156         if (a.sin6_scope_id != b.sin6_scope_id)
4157                 return (0);
4158
4159         return (1);
4160 }
4161
4162 /*
4163  * returns a sockaddr_in6 with embedded scope recovered and removed
4164  */
4165 struct sockaddr_in6 *
4166 sctp_recover_scope(struct sockaddr_in6 *addr, struct sockaddr_in6 *store)
4167 {
4168         /* check and strip embedded scope junk */
4169         if (addr->sin6_family == AF_INET6) {
4170                 if (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr)) {
4171                         if (addr->sin6_scope_id == 0) {
4172                                 *store = *addr;
4173                                 if (!sa6_recoverscope(store)) {
4174                                         /* use the recovered scope */
4175                                         addr = store;
4176                                 }
4177                         } else {
4178                                 /* else, return the original "to" addr */
4179                                 in6_clearscope(&addr->sin6_addr);
4180                         }
4181                 }
4182         }
4183         return (addr);
4184 }
4185
4186 #endif
4187
4188 /*
4189  * are the two addresses the same?  currently a "scopeless" check returns: 1
4190  * if same, 0 if not
4191  */
4192 int
4193 sctp_cmpaddr(struct sockaddr *sa1, struct sockaddr *sa2)
4194 {
4195
4196         /* must be valid */
4197         if (sa1 == NULL || sa2 == NULL)
4198                 return (0);
4199
4200         /* must be the same family */
4201         if (sa1->sa_family != sa2->sa_family)
4202                 return (0);
4203
4204         switch (sa1->sa_family) {
4205 #ifdef INET6
4206         case AF_INET6:
4207                 {
4208                         /* IPv6 addresses */
4209                         struct sockaddr_in6 *sin6_1, *sin6_2;
4210
4211                         sin6_1 = (struct sockaddr_in6 *)sa1;
4212                         sin6_2 = (struct sockaddr_in6 *)sa2;
4213                         return (SCTP6_ARE_ADDR_EQUAL(sin6_1,
4214                             sin6_2));
4215                 }
4216 #endif
4217 #ifdef INET
4218         case AF_INET:
4219                 {
4220                         /* IPv4 addresses */
4221                         struct sockaddr_in *sin_1, *sin_2;
4222
4223                         sin_1 = (struct sockaddr_in *)sa1;
4224                         sin_2 = (struct sockaddr_in *)sa2;
4225                         return (sin_1->sin_addr.s_addr == sin_2->sin_addr.s_addr);
4226                 }
4227 #endif
4228         default:
4229                 /* we don't do these... */
4230                 return (0);
4231         }
4232 }
4233
4234 void
4235 sctp_print_address(struct sockaddr *sa)
4236 {
4237 #ifdef INET6
4238         char ip6buf[INET6_ADDRSTRLEN];
4239
4240 #endif
4241
4242         switch (sa->sa_family) {
4243 #ifdef INET6
4244         case AF_INET6:
4245                 {
4246                         struct sockaddr_in6 *sin6;
4247
4248                         sin6 = (struct sockaddr_in6 *)sa;
4249                         SCTP_PRINTF("IPv6 address: %s:port:%d scope:%u\n",
4250                             ip6_sprintf(ip6buf, &sin6->sin6_addr),
4251                             ntohs(sin6->sin6_port),
4252                             sin6->sin6_scope_id);
4253                         break;
4254                 }
4255 #endif
4256 #ifdef INET
4257         case AF_INET:
4258                 {
4259                         struct sockaddr_in *sin;
4260                         unsigned char *p;
4261
4262                         sin = (struct sockaddr_in *)sa;
4263                         p = (unsigned char *)&sin->sin_addr;
4264                         SCTP_PRINTF("IPv4 address: %u.%u.%u.%u:%d\n",
4265                             p[0], p[1], p[2], p[3], ntohs(sin->sin_port));
4266                         break;
4267                 }
4268 #endif
4269         default:
4270                 SCTP_PRINTF("?\n");
4271                 break;
4272         }
4273 }
4274
4275 void
4276 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
4277     struct sctp_inpcb *new_inp,
4278     struct sctp_tcb *stcb,
4279     int waitflags)
4280 {
4281         /*
4282          * go through our old INP and pull off any control structures that
4283          * belong to stcb and move then to the new inp.
4284          */
4285         struct socket *old_so, *new_so;
4286         struct sctp_queued_to_read *control, *nctl;
4287         struct sctp_readhead tmp_queue;
4288         struct mbuf *m;
4289         int error = 0;
4290
4291         old_so = old_inp->sctp_socket;
4292         new_so = new_inp->sctp_socket;
4293         TAILQ_INIT(&tmp_queue);
4294         error = sblock(&old_so->so_rcv, waitflags);
4295         if (error) {
4296                 /*
4297                  * Gak, can't get sblock, we have a problem. data will be
4298                  * left stranded.. and we don't dare look at it since the
4299                  * other thread may be reading something. Oh well, its a
4300                  * screwed up app that does a peeloff OR a accept while
4301                  * reading from the main socket... actually its only the
4302                  * peeloff() case, since I think read will fail on a
4303                  * listening socket..
4304                  */
4305                 return;
4306         }
4307         /* lock the socket buffers */
4308         SCTP_INP_READ_LOCK(old_inp);
4309         TAILQ_FOREACH_SAFE(control, &old_inp->read_queue, next, nctl) {
4310                 /* Pull off all for out target stcb */
4311                 if (control->stcb == stcb) {
4312                         /* remove it we want it */
4313                         TAILQ_REMOVE(&old_inp->read_queue, control, next);
4314                         TAILQ_INSERT_TAIL(&tmp_queue, control, next);
4315                         m = control->data;
4316                         while (m) {
4317                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
4318                                         sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
4319                                 }
4320                                 sctp_sbfree(control, stcb, &old_so->so_rcv, m);
4321                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
4322                                         sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
4323                                 }
4324                                 m = SCTP_BUF_NEXT(m);
4325                         }
4326                 }
4327         }
4328         SCTP_INP_READ_UNLOCK(old_inp);
4329         /* Remove the sb-lock on the old socket */
4330
4331         sbunlock(&old_so->so_rcv);
4332         /* Now we move them over to the new socket buffer */
4333         SCTP_INP_READ_LOCK(new_inp);
4334         TAILQ_FOREACH_SAFE(control, &tmp_queue, next, nctl) {
4335                 TAILQ_INSERT_TAIL(&new_inp->read_queue, control, next);
4336                 m = control->data;
4337                 while (m) {
4338                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
4339                                 sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m));
4340                         }
4341                         sctp_sballoc(stcb, &new_so->so_rcv, m);
4342                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
4343                                 sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
4344                         }
4345                         m = SCTP_BUF_NEXT(m);
4346                 }
4347         }
4348         SCTP_INP_READ_UNLOCK(new_inp);
4349 }
4350
4351 void
4352 sctp_add_to_readq(struct sctp_inpcb *inp,
4353     struct sctp_tcb *stcb,
4354     struct sctp_queued_to_read *control,
4355     struct sockbuf *sb,
4356     int end,
4357     int inp_read_lock_held,
4358     int so_locked
4359 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4360     SCTP_UNUSED
4361 #endif
4362 )
4363 {
4364         /*
4365          * Here we must place the control on the end of the socket read
4366          * queue AND increment sb_cc so that select will work properly on
4367          * read.
4368          */
4369         struct mbuf *m, *prev = NULL;
4370
4371         if (inp == NULL) {
4372                 /* Gak, TSNH!! */
4373 #ifdef INVARIANTS
4374                 panic("Gak, inp NULL on add_to_readq");
4375 #endif
4376                 return;
4377         }
4378         if (inp_read_lock_held == 0)
4379                 SCTP_INP_READ_LOCK(inp);
4380         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) {
4381                 sctp_free_remote_addr(control->whoFrom);
4382                 if (control->data) {
4383                         sctp_m_freem(control->data);
4384                         control->data = NULL;
4385                 }
4386                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), control);
4387                 if (inp_read_lock_held == 0)
4388                         SCTP_INP_READ_UNLOCK(inp);
4389                 return;
4390         }
4391         if (!(control->spec_flags & M_NOTIFICATION)) {
4392                 atomic_add_int(&inp->total_recvs, 1);
4393                 if (!control->do_not_ref_stcb) {
4394                         atomic_add_int(&stcb->total_recvs, 1);
4395                 }
4396         }
4397         m = control->data;
4398         control->held_length = 0;
4399         control->length = 0;
4400         while (m) {
4401                 if (SCTP_BUF_LEN(m) == 0) {
4402                         /* Skip mbufs with NO length */
4403                         if (prev == NULL) {
4404                                 /* First one */
4405                                 control->data = sctp_m_free(m);
4406                                 m = control->data;
4407                         } else {
4408                                 SCTP_BUF_NEXT(prev) = sctp_m_free(m);
4409                                 m = SCTP_BUF_NEXT(prev);
4410                         }
4411                         if (m == NULL) {
4412                                 control->tail_mbuf = prev;
4413                         }
4414                         continue;
4415                 }
4416                 prev = m;
4417                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
4418                         sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m));
4419                 }
4420                 sctp_sballoc(stcb, sb, m);
4421                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
4422                         sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
4423                 }
4424                 atomic_add_int(&control->length, SCTP_BUF_LEN(m));
4425                 m = SCTP_BUF_NEXT(m);
4426         }
4427         if (prev != NULL) {
4428                 control->tail_mbuf = prev;
4429         } else {
4430                 /* Everything got collapsed out?? */
4431                 sctp_free_remote_addr(control->whoFrom);
4432                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), control);
4433                 if (inp_read_lock_held == 0)
4434                         SCTP_INP_READ_UNLOCK(inp);
4435                 return;
4436         }
4437         if (end) {
4438                 control->end_added = 1;
4439         }
4440         TAILQ_INSERT_TAIL(&inp->read_queue, control, next);
4441         if (inp_read_lock_held == 0)
4442                 SCTP_INP_READ_UNLOCK(inp);
4443         if (inp && inp->sctp_socket) {
4444                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE)) {
4445                         SCTP_ZERO_COPY_EVENT(inp, inp->sctp_socket);
4446                 } else {
4447 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4448                         struct socket *so;
4449
4450                         so = SCTP_INP_SO(inp);
4451                         if (!so_locked) {
4452                                 if (stcb) {
4453                                         atomic_add_int(&stcb->asoc.refcnt, 1);
4454                                         SCTP_TCB_UNLOCK(stcb);
4455                                 }
4456                                 SCTP_SOCKET_LOCK(so, 1);
4457                                 if (stcb) {
4458                                         SCTP_TCB_LOCK(stcb);
4459                                         atomic_subtract_int(&stcb->asoc.refcnt, 1);
4460                                 }
4461                                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4462                                         SCTP_SOCKET_UNLOCK(so, 1);
4463                                         return;
4464                                 }
4465                         }
4466 #endif
4467                         sctp_sorwakeup(inp, inp->sctp_socket);
4468 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4469                         if (!so_locked) {
4470                                 SCTP_SOCKET_UNLOCK(so, 1);
4471                         }
4472 #endif
4473                 }
4474         }
4475 }
4476
4477
4478 int
4479 sctp_append_to_readq(struct sctp_inpcb *inp,
4480     struct sctp_tcb *stcb,
4481     struct sctp_queued_to_read *control,
4482     struct mbuf *m,
4483     int end,
4484     int ctls_cumack,
4485     struct sockbuf *sb)
4486 {
4487         /*
4488          * A partial delivery API event is underway. OR we are appending on
4489          * the reassembly queue.
4490          *
4491          * If PDAPI this means we need to add m to the end of the data.
4492          * Increase the length in the control AND increment the sb_cc.
4493          * Otherwise sb is NULL and all we need to do is put it at the end
4494          * of the mbuf chain.
4495          */
4496         int len = 0;
4497         struct mbuf *mm, *tail = NULL, *prev = NULL;
4498
4499         if (inp) {
4500                 SCTP_INP_READ_LOCK(inp);
4501         }
4502         if (control == NULL) {
4503 get_out:
4504                 if (inp) {
4505                         SCTP_INP_READ_UNLOCK(inp);
4506                 }
4507                 return (-1);
4508         }
4509         if (inp && (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ)) {
4510                 SCTP_INP_READ_UNLOCK(inp);
4511                 return (0);
4512         }
4513         if (control->end_added) {
4514                 /* huh this one is complete? */
4515                 goto get_out;
4516         }
4517         mm = m;
4518         if (mm == NULL) {
4519                 goto get_out;
4520         }
4521         while (mm) {
4522                 if (SCTP_BUF_LEN(mm) == 0) {
4523                         /* Skip mbufs with NO lenght */
4524                         if (prev == NULL) {
4525                                 /* First one */
4526                                 m = sctp_m_free(mm);
4527                                 mm = m;
4528                         } else {
4529                                 SCTP_BUF_NEXT(prev) = sctp_m_free(mm);
4530                                 mm = SCTP_BUF_NEXT(prev);
4531                         }
4532                         continue;
4533                 }
4534                 prev = mm;
4535                 len += SCTP_BUF_LEN(mm);
4536                 if (sb) {
4537                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
4538                                 sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(mm));
4539                         }
4540                         sctp_sballoc(stcb, sb, mm);
4541                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
4542                                 sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
4543                         }
4544                 }
4545                 mm = SCTP_BUF_NEXT(mm);
4546         }
4547         if (prev) {
4548                 tail = prev;
4549         } else {
4550                 /* Really there should always be a prev */
4551                 if (m == NULL) {
4552                         /* Huh nothing left? */
4553 #ifdef INVARIANTS
4554                         panic("Nothing left to add?");
4555 #else
4556                         goto get_out;
4557 #endif
4558                 }
4559                 tail = m;
4560         }
4561         if (control->tail_mbuf) {
4562                 /* append */
4563                 SCTP_BUF_NEXT(control->tail_mbuf) = m;
4564                 control->tail_mbuf = tail;
4565         } else {
4566                 /* nothing there */
4567 #ifdef INVARIANTS
4568                 if (control->data != NULL) {
4569                         panic("This should NOT happen");
4570                 }
4571 #endif
4572                 control->data = m;
4573                 control->tail_mbuf = tail;
4574         }
4575         atomic_add_int(&control->length, len);
4576         if (end) {
4577                 /* message is complete */
4578                 if (stcb && (control == stcb->asoc.control_pdapi)) {
4579                         stcb->asoc.control_pdapi = NULL;
4580                 }
4581                 control->held_length = 0;
4582                 control->end_added = 1;
4583         }
4584         if (stcb == NULL) {
4585                 control->do_not_ref_stcb = 1;
4586         }
4587         /*
4588          * When we are appending in partial delivery, the cum-ack is used
4589          * for the actual pd-api highest tsn on this mbuf. The true cum-ack
4590          * is populated in the outbound sinfo structure from the true cumack
4591          * if the association exists...
4592          */
4593         control->sinfo_tsn = control->sinfo_cumtsn = ctls_cumack;
4594         if (inp) {
4595                 SCTP_INP_READ_UNLOCK(inp);
4596         }
4597         if (inp && inp->sctp_socket) {
4598                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE)) {
4599                         SCTP_ZERO_COPY_EVENT(inp, inp->sctp_socket);
4600                 } else {
4601 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4602                         struct socket *so;
4603
4604                         so = SCTP_INP_SO(inp);
4605                         if (stcb) {
4606                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4607                                 SCTP_TCB_UNLOCK(stcb);
4608                         }
4609                         SCTP_SOCKET_LOCK(so, 1);
4610                         if (stcb) {
4611                                 SCTP_TCB_LOCK(stcb);
4612                                 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4613                         }
4614                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4615                                 SCTP_SOCKET_UNLOCK(so, 1);
4616                                 return (0);
4617                         }
4618 #endif
4619                         sctp_sorwakeup(inp, inp->sctp_socket);
4620 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4621                         SCTP_SOCKET_UNLOCK(so, 1);
4622 #endif
4623                 }
4624         }
4625         return (0);
4626 }
4627
4628
4629
4630 /*************HOLD THIS COMMENT FOR PATCH FILE OF
4631  *************ALTERNATE ROUTING CODE
4632  */
4633
4634 /*************HOLD THIS COMMENT FOR END OF PATCH FILE OF
4635  *************ALTERNATE ROUTING CODE
4636  */
4637
4638 struct mbuf *
4639 sctp_generate_cause(uint16_t code, char *info)
4640 {
4641         struct mbuf *m;
4642         struct sctp_gen_error_cause *cause;
4643         size_t info_len, len;
4644
4645         if ((code == 0) || (info == NULL)) {
4646                 return (NULL);
4647         }
4648         info_len = strlen(info);
4649         len = sizeof(struct sctp_paramhdr) + info_len;
4650         m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
4651         if (m != NULL) {
4652                 SCTP_BUF_LEN(m) = len;
4653                 cause = mtod(m, struct sctp_gen_error_cause *);
4654                 cause->code = htons(code);
4655                 cause->length = htons((uint16_t) len);
4656                 memcpy(cause->info, info, info_len);
4657         }
4658         return (m);
4659 }
4660
4661 struct mbuf *
4662 sctp_generate_no_user_data_cause(uint32_t tsn)
4663 {
4664         struct mbuf *m;
4665         struct sctp_error_no_user_data *no_user_data_cause;
4666         size_t len;
4667
4668         len = sizeof(struct sctp_error_no_user_data);
4669         m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
4670         if (m != NULL) {
4671                 SCTP_BUF_LEN(m) = len;
4672                 no_user_data_cause = mtod(m, struct sctp_error_no_user_data *);
4673                 no_user_data_cause->cause.code = htons(SCTP_CAUSE_NO_USER_DATA);
4674                 no_user_data_cause->cause.length = htons((uint16_t) len);
4675                 no_user_data_cause->tsn = tsn;  /* tsn is passed in as NBO */
4676         }
4677         return (m);
4678 }
4679
4680 #ifdef SCTP_MBCNT_LOGGING
4681 void
4682 sctp_free_bufspace(struct sctp_tcb *stcb, struct sctp_association *asoc,
4683     struct sctp_tmit_chunk *tp1, int chk_cnt)
4684 {
4685         if (tp1->data == NULL) {
4686                 return;
4687         }
4688         asoc->chunks_on_out_queue -= chk_cnt;
4689         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBCNT_LOGGING_ENABLE) {
4690                 sctp_log_mbcnt(SCTP_LOG_MBCNT_DECREASE,
4691                     asoc->total_output_queue_size,
4692                     tp1->book_size,
4693                     0,
4694                     tp1->mbcnt);
4695         }
4696         if (asoc->total_output_queue_size >= tp1->book_size) {
4697                 atomic_add_int(&asoc->total_output_queue_size, -tp1->book_size);
4698         } else {
4699                 asoc->total_output_queue_size = 0;
4700         }
4701
4702         if (stcb->sctp_socket && (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) ||
4703             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)))) {
4704                 if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) {
4705                         stcb->sctp_socket->so_snd.sb_cc -= tp1->book_size;
4706                 } else {
4707                         stcb->sctp_socket->so_snd.sb_cc = 0;
4708
4709                 }
4710         }
4711 }
4712
4713 #endif
4714
4715 int
4716 sctp_release_pr_sctp_chunk(struct sctp_tcb *stcb, struct sctp_tmit_chunk *tp1,
4717     uint8_t sent, int so_locked
4718 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4719     SCTP_UNUSED
4720 #endif
4721 )
4722 {
4723         struct sctp_stream_out *strq;
4724         struct sctp_tmit_chunk *chk = NULL, *tp2;
4725         struct sctp_stream_queue_pending *sp;
4726         uint16_t stream = 0, seq = 0;
4727         uint8_t foundeom = 0;
4728         int ret_sz = 0;
4729         int notdone;
4730         int do_wakeup_routine = 0;
4731
4732         stream = tp1->rec.data.stream_number;
4733         seq = tp1->rec.data.stream_seq;
4734         if (sent || !(tp1->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG)) {
4735                 stcb->asoc.abandoned_sent[0]++;
4736                 stcb->asoc.abandoned_sent[PR_SCTP_POLICY(tp1->flags)]++;
4737                 stcb->asoc.strmout[stream].abandoned_sent[0]++;
4738 #if defined(SCTP_DETAILED_STR_STATS)
4739                 stcb->asoc.strmout[stream].abandoned_sent[PR_SCTP_POLICY(tp1->flags)]++;
4740 #endif
4741         } else {
4742                 stcb->asoc.abandoned_unsent[0]++;
4743                 stcb->asoc.abandoned_unsent[PR_SCTP_POLICY(tp1->flags)]++;
4744                 stcb->asoc.strmout[stream].abandoned_unsent[0]++;
4745 #if defined(SCTP_DETAILED_STR_STATS)
4746                 stcb->asoc.strmout[stream].abandoned_unsent[PR_SCTP_POLICY(tp1->flags)]++;
4747 #endif
4748         }
4749         do {
4750                 ret_sz += tp1->book_size;
4751                 if (tp1->data != NULL) {
4752                         if (tp1->sent < SCTP_DATAGRAM_RESEND) {
4753                                 sctp_flight_size_decrease(tp1);
4754                                 sctp_total_flight_decrease(stcb, tp1);
4755                         }
4756                         sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
4757                         stcb->asoc.peers_rwnd += tp1->send_size;
4758                         stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
4759                         if (sent) {
4760                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked);
4761                         } else {
4762                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked);
4763                         }
4764                         if (tp1->data) {
4765                                 sctp_m_freem(tp1->data);
4766                                 tp1->data = NULL;
4767                         }
4768                         do_wakeup_routine = 1;
4769                         if (PR_SCTP_BUF_ENABLED(tp1->flags)) {
4770                                 stcb->asoc.sent_queue_cnt_removeable--;
4771                         }
4772                 }
4773                 tp1->sent = SCTP_FORWARD_TSN_SKIP;
4774                 if ((tp1->rec.data.rcv_flags & SCTP_DATA_NOT_FRAG) ==
4775                     SCTP_DATA_NOT_FRAG) {
4776                         /* not frag'ed we ae done   */
4777                         notdone = 0;
4778                         foundeom = 1;
4779                 } else if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
4780                         /* end of frag, we are done */
4781                         notdone = 0;
4782                         foundeom = 1;
4783                 } else {
4784                         /*
4785                          * Its a begin or middle piece, we must mark all of
4786                          * it
4787                          */
4788                         notdone = 1;
4789                         tp1 = TAILQ_NEXT(tp1, sctp_next);
4790                 }
4791         } while (tp1 && notdone);
4792         if (foundeom == 0) {
4793                 /*
4794                  * The multi-part message was scattered across the send and
4795                  * sent queue.
4796                  */
4797                 TAILQ_FOREACH_SAFE(tp1, &stcb->asoc.send_queue, sctp_next, tp2) {
4798                         if ((tp1->rec.data.stream_number != stream) ||
4799                             (tp1->rec.data.stream_seq != seq)) {
4800                                 break;
4801                         }
4802                         /*
4803                          * save to chk in case we have some on stream out
4804                          * queue. If so and we have an un-transmitted one we
4805                          * don't have to fudge the TSN.
4806                          */
4807                         chk = tp1;
4808                         ret_sz += tp1->book_size;
4809                         sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
4810                         if (sent) {
4811                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked);
4812                         } else {
4813                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked);
4814                         }
4815                         if (tp1->data) {
4816                                 sctp_m_freem(tp1->data);
4817                                 tp1->data = NULL;
4818                         }
4819                         /* No flight involved here book the size to 0 */
4820                         tp1->book_size = 0;
4821                         if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
4822                                 foundeom = 1;
4823                         }
4824                         do_wakeup_routine = 1;
4825                         tp1->sent = SCTP_FORWARD_TSN_SKIP;
4826                         TAILQ_REMOVE(&stcb->asoc.send_queue, tp1, sctp_next);
4827                         /*
4828                          * on to the sent queue so we can wait for it to be
4829                          * passed by.
4830                          */
4831                         TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, tp1,
4832                             sctp_next);
4833                         stcb->asoc.send_queue_cnt--;
4834                         stcb->asoc.sent_queue_cnt++;
4835                 }
4836         }
4837         if (foundeom == 0) {
4838                 /*
4839                  * Still no eom found. That means there is stuff left on the
4840                  * stream out queue.. yuck.
4841                  */
4842                 SCTP_TCB_SEND_LOCK(stcb);
4843                 strq = &stcb->asoc.strmout[stream];
4844                 sp = TAILQ_FIRST(&strq->outqueue);
4845                 if (sp != NULL) {
4846                         sp->discard_rest = 1;
4847                         /*
4848                          * We may need to put a chunk on the queue that
4849                          * holds the TSN that would have been sent with the
4850                          * LAST bit.
4851                          */
4852                         if (chk == NULL) {
4853                                 /* Yep, we have to */
4854                                 sctp_alloc_a_chunk(stcb, chk);
4855                                 if (chk == NULL) {
4856                                         /*
4857                                          * we are hosed. All we can do is
4858                                          * nothing.. which will cause an
4859                                          * abort if the peer is paying
4860                                          * attention.
4861                                          */
4862                                         goto oh_well;
4863                                 }
4864                                 memset(chk, 0, sizeof(*chk));
4865                                 chk->rec.data.rcv_flags = SCTP_DATA_LAST_FRAG;
4866                                 chk->sent = SCTP_FORWARD_TSN_SKIP;
4867                                 chk->asoc = &stcb->asoc;
4868                                 chk->rec.data.stream_seq = strq->next_sequence_send;
4869                                 chk->rec.data.stream_number = sp->stream;
4870                                 chk->rec.data.payloadtype = sp->ppid;
4871                                 chk->rec.data.context = sp->context;
4872                                 chk->flags = sp->act_flags;
4873                                 if (sp->net)
4874                                         chk->whoTo = sp->net;
4875                                 else
4876                                         chk->whoTo = stcb->asoc.primary_destination;
4877                                 atomic_add_int(&chk->whoTo->ref_count, 1);
4878                                 chk->rec.data.TSN_seq = atomic_fetchadd_int(&stcb->asoc.sending_seq, 1);
4879                                 stcb->asoc.pr_sctp_cnt++;
4880                                 TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, chk, sctp_next);
4881                                 stcb->asoc.sent_queue_cnt++;
4882                                 stcb->asoc.pr_sctp_cnt++;
4883                         } else {
4884                                 chk->rec.data.rcv_flags |= SCTP_DATA_LAST_FRAG;
4885                         }
4886                         strq->next_sequence_send++;
4887         oh_well:
4888                         if (sp->data) {
4889                                 /*
4890                                  * Pull any data to free up the SB and allow
4891                                  * sender to "add more" while we will throw
4892                                  * away :-)
4893                                  */
4894                                 sctp_free_spbufspace(stcb, &stcb->asoc, sp);
4895                                 ret_sz += sp->length;
4896                                 do_wakeup_routine = 1;
4897                                 sp->some_taken = 1;
4898                                 sctp_m_freem(sp->data);
4899                                 sp->data = NULL;
4900                                 sp->tail_mbuf = NULL;
4901                                 sp->length = 0;
4902                         }
4903                 }
4904                 SCTP_TCB_SEND_UNLOCK(stcb);
4905         }
4906         if (do_wakeup_routine) {
4907 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4908                 struct socket *so;
4909
4910                 so = SCTP_INP_SO(stcb->sctp_ep);
4911                 if (!so_locked) {
4912                         atomic_add_int(&stcb->asoc.refcnt, 1);
4913                         SCTP_TCB_UNLOCK(stcb);
4914                         SCTP_SOCKET_LOCK(so, 1);
4915                         SCTP_TCB_LOCK(stcb);
4916                         atomic_subtract_int(&stcb->asoc.refcnt, 1);
4917                         if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
4918                                 /* assoc was freed while we were unlocked */
4919                                 SCTP_SOCKET_UNLOCK(so, 1);
4920                                 return (ret_sz);
4921                         }
4922                 }
4923 #endif
4924                 sctp_sowwakeup(stcb->sctp_ep, stcb->sctp_socket);
4925 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4926                 if (!so_locked) {
4927                         SCTP_SOCKET_UNLOCK(so, 1);
4928                 }
4929 #endif
4930         }
4931         return (ret_sz);
4932 }
4933
4934 /*
4935  * checks to see if the given address, sa, is one that is currently known by
4936  * the kernel note: can't distinguish the same address on multiple interfaces
4937  * and doesn't handle multiple addresses with different zone/scope id's note:
4938  * ifa_ifwithaddr() compares the entire sockaddr struct
4939  */
4940 struct sctp_ifa *
4941 sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr,
4942     int holds_lock)
4943 {
4944         struct sctp_laddr *laddr;
4945
4946         if (holds_lock == 0) {
4947                 SCTP_INP_RLOCK(inp);
4948         }
4949         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4950                 if (laddr->ifa == NULL)
4951                         continue;
4952                 if (addr->sa_family != laddr->ifa->address.sa.sa_family)
4953                         continue;
4954 #ifdef INET
4955                 if (addr->sa_family == AF_INET) {
4956                         if (((struct sockaddr_in *)addr)->sin_addr.s_addr ==
4957                             laddr->ifa->address.sin.sin_addr.s_addr) {
4958                                 /* found him. */
4959                                 if (holds_lock == 0) {
4960                                         SCTP_INP_RUNLOCK(inp);
4961                                 }
4962                                 return (laddr->ifa);
4963                                 break;
4964                         }
4965                 }
4966 #endif
4967 #ifdef INET6
4968                 if (addr->sa_family == AF_INET6) {
4969                         if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr,
4970                             &laddr->ifa->address.sin6)) {
4971                                 /* found him. */
4972                                 if (holds_lock == 0) {
4973                                         SCTP_INP_RUNLOCK(inp);
4974                                 }
4975                                 return (laddr->ifa);
4976                                 break;
4977                         }
4978                 }
4979 #endif
4980         }
4981         if (holds_lock == 0) {
4982                 SCTP_INP_RUNLOCK(inp);
4983         }
4984         return (NULL);
4985 }
4986
4987 uint32_t
4988 sctp_get_ifa_hash_val(struct sockaddr *addr)
4989 {
4990         switch (addr->sa_family) {
4991 #ifdef INET
4992         case AF_INET:
4993                 {
4994                         struct sockaddr_in *sin;
4995
4996                         sin = (struct sockaddr_in *)addr;
4997                         return (sin->sin_addr.s_addr ^ (sin->sin_addr.s_addr >> 16));
4998                 }
4999 #endif
5000 #ifdef INET6
5001         case AF_INET6:
5002                 {
5003                         struct sockaddr_in6 *sin6;
5004                         uint32_t hash_of_addr;
5005
5006                         sin6 = (struct sockaddr_in6 *)addr;
5007                         hash_of_addr = (sin6->sin6_addr.s6_addr32[0] +
5008                             sin6->sin6_addr.s6_addr32[1] +
5009                             sin6->sin6_addr.s6_addr32[2] +
5010                             sin6->sin6_addr.s6_addr32[3]);
5011                         hash_of_addr = (hash_of_addr ^ (hash_of_addr >> 16));
5012                         return (hash_of_addr);
5013                 }
5014 #endif
5015         default:
5016                 break;
5017         }
5018         return (0);
5019 }
5020
5021 struct sctp_ifa *
5022 sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock)
5023 {
5024         struct sctp_ifa *sctp_ifap;
5025         struct sctp_vrf *vrf;
5026         struct sctp_ifalist *hash_head;
5027         uint32_t hash_of_addr;
5028
5029         if (holds_lock == 0)
5030                 SCTP_IPI_ADDR_RLOCK();
5031
5032         vrf = sctp_find_vrf(vrf_id);
5033         if (vrf == NULL) {
5034 stage_right:
5035                 if (holds_lock == 0)
5036                         SCTP_IPI_ADDR_RUNLOCK();
5037                 return (NULL);
5038         }
5039         hash_of_addr = sctp_get_ifa_hash_val(addr);
5040
5041         hash_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
5042         if (hash_head == NULL) {
5043                 SCTP_PRINTF("hash_of_addr:%x mask:%x table:%x - ",
5044                     hash_of_addr, (uint32_t) vrf->vrf_addr_hashmark,
5045                     (uint32_t) (hash_of_addr & vrf->vrf_addr_hashmark));
5046                 sctp_print_address(addr);
5047                 SCTP_PRINTF("No such bucket for address\n");
5048                 if (holds_lock == 0)
5049                         SCTP_IPI_ADDR_RUNLOCK();
5050
5051                 return (NULL);
5052         }
5053         LIST_FOREACH(sctp_ifap, hash_head, next_bucket) {
5054                 if (sctp_ifap == NULL) {
5055 #ifdef INVARIANTS
5056                         panic("Huh LIST_FOREACH corrupt");
5057                         goto stage_right;
5058 #else
5059                         SCTP_PRINTF("LIST corrupt of sctp_ifap's?\n");
5060                         goto stage_right;
5061 #endif
5062                 }
5063                 if (addr->sa_family != sctp_ifap->address.sa.sa_family)
5064                         continue;
5065 #ifdef INET
5066                 if (addr->sa_family == AF_INET) {
5067                         if (((struct sockaddr_in *)addr)->sin_addr.s_addr ==
5068                             sctp_ifap->address.sin.sin_addr.s_addr) {
5069                                 /* found him. */
5070                                 if (holds_lock == 0)
5071                                         SCTP_IPI_ADDR_RUNLOCK();
5072                                 return (sctp_ifap);
5073                                 break;
5074                         }
5075                 }
5076 #endif
5077 #ifdef INET6
5078                 if (addr->sa_family == AF_INET6) {
5079                         if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr,
5080                             &sctp_ifap->address.sin6)) {
5081                                 /* found him. */
5082                                 if (holds_lock == 0)
5083                                         SCTP_IPI_ADDR_RUNLOCK();
5084                                 return (sctp_ifap);
5085                                 break;
5086                         }
5087                 }
5088 #endif
5089         }
5090         if (holds_lock == 0)
5091                 SCTP_IPI_ADDR_RUNLOCK();
5092         return (NULL);
5093 }
5094
5095 static void
5096 sctp_user_rcvd(struct sctp_tcb *stcb, uint32_t * freed_so_far, int hold_rlock,
5097     uint32_t rwnd_req)
5098 {
5099         /* User pulled some data, do we need a rwnd update? */
5100         int r_unlocked = 0;
5101         uint32_t dif, rwnd;
5102         struct socket *so = NULL;
5103
5104         if (stcb == NULL)
5105                 return;
5106
5107         atomic_add_int(&stcb->asoc.refcnt, 1);
5108
5109         if (stcb->asoc.state & (SCTP_STATE_ABOUT_TO_BE_FREED |
5110             SCTP_STATE_SHUTDOWN_RECEIVED |
5111             SCTP_STATE_SHUTDOWN_ACK_SENT)) {
5112                 /* Pre-check If we are freeing no update */
5113                 goto no_lock;
5114         }
5115         SCTP_INP_INCR_REF(stcb->sctp_ep);
5116         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5117             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5118                 goto out;
5119         }
5120         so = stcb->sctp_socket;
5121         if (so == NULL) {
5122                 goto out;
5123         }
5124         atomic_add_int(&stcb->freed_by_sorcv_sincelast, *freed_so_far);
5125         /* Have you have freed enough to look */
5126         *freed_so_far = 0;
5127         /* Yep, its worth a look and the lock overhead */
5128
5129         /* Figure out what the rwnd would be */
5130         rwnd = sctp_calc_rwnd(stcb, &stcb->asoc);
5131         if (rwnd >= stcb->asoc.my_last_reported_rwnd) {
5132                 dif = rwnd - stcb->asoc.my_last_reported_rwnd;
5133         } else {
5134                 dif = 0;
5135         }
5136         if (dif >= rwnd_req) {
5137                 if (hold_rlock) {
5138                         SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
5139                         r_unlocked = 1;
5140                 }
5141                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
5142                         /*
5143                          * One last check before we allow the guy possibly
5144                          * to get in. There is a race, where the guy has not
5145                          * reached the gate. In that case
5146                          */
5147                         goto out;
5148                 }
5149                 SCTP_TCB_LOCK(stcb);
5150                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
5151                         /* No reports here */
5152                         SCTP_TCB_UNLOCK(stcb);
5153                         goto out;
5154                 }
5155                 SCTP_STAT_INCR(sctps_wu_sacks_sent);
5156                 sctp_send_sack(stcb, SCTP_SO_LOCKED);
5157
5158                 sctp_chunk_output(stcb->sctp_ep, stcb,
5159                     SCTP_OUTPUT_FROM_USR_RCVD, SCTP_SO_LOCKED);
5160                 /* make sure no timer is running */
5161                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTPUTIL + SCTP_LOC_6);
5162                 SCTP_TCB_UNLOCK(stcb);
5163         } else {
5164                 /* Update how much we have pending */
5165                 stcb->freed_by_sorcv_sincelast = dif;
5166         }
5167 out:
5168         if (so && r_unlocked && hold_rlock) {
5169                 SCTP_INP_READ_LOCK(stcb->sctp_ep);
5170         }
5171         SCTP_INP_DECR_REF(stcb->sctp_ep);
5172 no_lock:
5173         atomic_add_int(&stcb->asoc.refcnt, -1);
5174         return;
5175 }
5176
5177 int
5178 sctp_sorecvmsg(struct socket *so,
5179     struct uio *uio,
5180     struct mbuf **mp,
5181     struct sockaddr *from,
5182     int fromlen,
5183     int *msg_flags,
5184     struct sctp_sndrcvinfo *sinfo,
5185     int filling_sinfo)
5186 {
5187         /*
5188          * MSG flags we will look at MSG_DONTWAIT - non-blocking IO.
5189          * MSG_PEEK - Look don't touch :-D (only valid with OUT mbuf copy
5190          * mp=NULL thus uio is the copy method to userland) MSG_WAITALL - ??
5191          * On the way out we may send out any combination of:
5192          * MSG_NOTIFICATION MSG_EOR
5193          *
5194          */
5195         struct sctp_inpcb *inp = NULL;
5196         int my_len = 0;
5197         int cp_len = 0, error = 0;
5198         struct sctp_queued_to_read *control = NULL, *ctl = NULL, *nxt = NULL;
5199         struct mbuf *m = NULL;
5200         struct sctp_tcb *stcb = NULL;
5201         int wakeup_read_socket = 0;
5202         int freecnt_applied = 0;
5203         int out_flags = 0, in_flags = 0;
5204         int block_allowed = 1;
5205         uint32_t freed_so_far = 0;
5206         uint32_t copied_so_far = 0;
5207         int in_eeor_mode = 0;
5208         int no_rcv_needed = 0;
5209         uint32_t rwnd_req = 0;
5210         int hold_sblock = 0;
5211         int hold_rlock = 0;
5212         int slen = 0;
5213         uint32_t held_length = 0;
5214         int sockbuf_lock = 0;
5215
5216         if (uio == NULL) {
5217                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
5218                 return (EINVAL);
5219         }
5220         if (msg_flags) {
5221                 in_flags = *msg_flags;
5222                 if (in_flags & MSG_PEEK)
5223                         SCTP_STAT_INCR(sctps_read_peeks);
5224         } else {
5225                 in_flags = 0;
5226         }
5227         slen = uio->uio_resid;
5228
5229         /* Pull in and set up our int flags */
5230         if (in_flags & MSG_OOB) {
5231                 /* Out of band's NOT supported */
5232                 return (EOPNOTSUPP);
5233         }
5234         if ((in_flags & MSG_PEEK) && (mp != NULL)) {
5235                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
5236                 return (EINVAL);
5237         }
5238         if ((in_flags & (MSG_DONTWAIT
5239             | MSG_NBIO
5240             )) ||
5241             SCTP_SO_IS_NBIO(so)) {
5242                 block_allowed = 0;
5243         }
5244         /* setup the endpoint */
5245         inp = (struct sctp_inpcb *)so->so_pcb;
5246         if (inp == NULL) {
5247                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EFAULT);
5248                 return (EFAULT);
5249         }
5250         rwnd_req = (SCTP_SB_LIMIT_RCV(so) >> SCTP_RWND_HIWAT_SHIFT);
5251         /* Must be at least a MTU's worth */
5252         if (rwnd_req < SCTP_MIN_RWND)
5253                 rwnd_req = SCTP_MIN_RWND;
5254         in_eeor_mode = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
5255         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) {
5256                 sctp_misc_ints(SCTP_SORECV_ENTER,
5257                     rwnd_req, in_eeor_mode, so->so_rcv.sb_cc, uio->uio_resid);
5258         }
5259         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) {
5260                 sctp_misc_ints(SCTP_SORECV_ENTERPL,
5261                     rwnd_req, block_allowed, so->so_rcv.sb_cc, uio->uio_resid);
5262         }
5263         error = sblock(&so->so_rcv, (block_allowed ? SBL_WAIT : 0));
5264         if (error) {
5265                 goto release_unlocked;
5266         }
5267         sockbuf_lock = 1;
5268 restart:
5269
5270
5271 restart_nosblocks:
5272         if (hold_sblock == 0) {
5273                 SOCKBUF_LOCK(&so->so_rcv);
5274                 hold_sblock = 1;
5275         }
5276         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5277             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5278                 goto out;
5279         }
5280         if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && (so->so_rcv.sb_cc == 0)) {
5281                 if (so->so_error) {
5282                         error = so->so_error;
5283                         if ((in_flags & MSG_PEEK) == 0)
5284                                 so->so_error = 0;
5285                         goto out;
5286                 } else {
5287                         if (so->so_rcv.sb_cc == 0) {
5288                                 /* indicate EOF */
5289                                 error = 0;
5290                                 goto out;
5291                         }
5292                 }
5293         }
5294         if ((so->so_rcv.sb_cc <= held_length) && block_allowed) {
5295                 /* we need to wait for data */
5296                 if ((so->so_rcv.sb_cc == 0) &&
5297                     ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
5298                     (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
5299                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) {
5300                                 /*
5301                                  * For active open side clear flags for
5302                                  * re-use passive open is blocked by
5303                                  * connect.
5304                                  */
5305                                 if (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED) {
5306                                         /*
5307                                          * You were aborted, passive side
5308                                          * always hits here
5309                                          */
5310                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
5311                                         error = ECONNRESET;
5312                                 }
5313                                 so->so_state &= ~(SS_ISCONNECTING |
5314                                     SS_ISDISCONNECTING |
5315                                     SS_ISCONFIRMING |
5316                                     SS_ISCONNECTED);
5317                                 if (error == 0) {
5318                                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) == 0) {
5319                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOTCONN);
5320                                                 error = ENOTCONN;
5321                                         }
5322                                 }
5323                                 goto out;
5324                         }
5325                 }
5326                 error = sbwait(&so->so_rcv);
5327                 if (error) {
5328                         goto out;
5329                 }
5330                 held_length = 0;
5331                 goto restart_nosblocks;
5332         } else if (so->so_rcv.sb_cc == 0) {
5333                 if (so->so_error) {
5334                         error = so->so_error;
5335                         if ((in_flags & MSG_PEEK) == 0)
5336                                 so->so_error = 0;
5337                 } else {
5338                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
5339                             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
5340                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) {
5341                                         /*
5342                                          * For active open side clear flags
5343                                          * for re-use passive open is
5344                                          * blocked by connect.
5345                                          */
5346                                         if (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED) {
5347                                                 /*
5348                                                  * You were aborted, passive
5349                                                  * side always hits here
5350                                                  */
5351                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
5352                                                 error = ECONNRESET;
5353                                         }
5354                                         so->so_state &= ~(SS_ISCONNECTING |
5355                                             SS_ISDISCONNECTING |
5356                                             SS_ISCONFIRMING |
5357                                             SS_ISCONNECTED);
5358                                         if (error == 0) {
5359                                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) == 0) {
5360                                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOTCONN);
5361                                                         error = ENOTCONN;
5362                                                 }
5363                                         }
5364                                         goto out;
5365                                 }
5366                         }
5367                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EWOULDBLOCK);
5368                         error = EWOULDBLOCK;
5369                 }
5370                 goto out;
5371         }
5372         if (hold_sblock == 1) {
5373                 SOCKBUF_UNLOCK(&so->so_rcv);
5374                 hold_sblock = 0;
5375         }
5376         /* we possibly have data we can read */
5377         /* sa_ignore FREED_MEMORY */
5378         control = TAILQ_FIRST(&inp->read_queue);
5379         if (control == NULL) {
5380                 /*
5381                  * This could be happening since the appender did the
5382                  * increment but as not yet did the tailq insert onto the
5383                  * read_queue
5384                  */
5385                 if (hold_rlock == 0) {
5386                         SCTP_INP_READ_LOCK(inp);
5387                 }
5388                 control = TAILQ_FIRST(&inp->read_queue);
5389                 if ((control == NULL) && (so->so_rcv.sb_cc != 0)) {
5390 #ifdef INVARIANTS
5391                         panic("Huh, its non zero and nothing on control?");
5392 #endif
5393                         so->so_rcv.sb_cc = 0;
5394                 }
5395                 SCTP_INP_READ_UNLOCK(inp);
5396                 hold_rlock = 0;
5397                 goto restart;
5398         }
5399         if ((control->length == 0) &&
5400             (control->do_not_ref_stcb)) {
5401                 /*
5402                  * Clean up code for freeing assoc that left behind a
5403                  * pdapi.. maybe a peer in EEOR that just closed after
5404                  * sending and never indicated a EOR.
5405                  */
5406                 if (hold_rlock == 0) {
5407                         hold_rlock = 1;
5408                         SCTP_INP_READ_LOCK(inp);
5409                 }
5410                 control->held_length = 0;
5411                 if (control->data) {
5412                         /* Hmm there is data here .. fix */
5413                         struct mbuf *m_tmp;
5414                         int cnt = 0;
5415
5416                         m_tmp = control->data;
5417                         while (m_tmp) {
5418                                 cnt += SCTP_BUF_LEN(m_tmp);
5419                                 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5420                                         control->tail_mbuf = m_tmp;
5421                                         control->end_added = 1;
5422                                 }
5423                                 m_tmp = SCTP_BUF_NEXT(m_tmp);
5424                         }
5425                         control->length = cnt;
5426                 } else {
5427                         /* remove it */
5428                         TAILQ_REMOVE(&inp->read_queue, control, next);
5429                         /* Add back any hiddend data */
5430                         sctp_free_remote_addr(control->whoFrom);
5431                         sctp_free_a_readq(stcb, control);
5432                 }
5433                 if (hold_rlock) {
5434                         hold_rlock = 0;
5435                         SCTP_INP_READ_UNLOCK(inp);
5436                 }
5437                 goto restart;
5438         }
5439         if ((control->length == 0) &&
5440             (control->end_added == 1)) {
5441                 /*
5442                  * Do we also need to check for (control->pdapi_aborted ==
5443                  * 1)?
5444                  */
5445                 if (hold_rlock == 0) {
5446                         hold_rlock = 1;
5447                         SCTP_INP_READ_LOCK(inp);
5448                 }
5449                 TAILQ_REMOVE(&inp->read_queue, control, next);
5450                 if (control->data) {
5451 #ifdef INVARIANTS
5452                         panic("control->data not null but control->length == 0");
5453 #else
5454                         SCTP_PRINTF("Strange, data left in the control buffer. Cleaning up.\n");
5455                         sctp_m_freem(control->data);
5456                         control->data = NULL;
5457 #endif
5458                 }
5459                 if (control->aux_data) {
5460                         sctp_m_free(control->aux_data);
5461                         control->aux_data = NULL;
5462                 }
5463                 sctp_free_remote_addr(control->whoFrom);
5464                 sctp_free_a_readq(stcb, control);
5465                 if (hold_rlock) {
5466                         hold_rlock = 0;
5467                         SCTP_INP_READ_UNLOCK(inp);
5468                 }
5469                 goto restart;
5470         }
5471         if (control->length == 0) {
5472                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE)) &&
5473                     (filling_sinfo)) {
5474                         /* find a more suitable one then this */
5475                         ctl = TAILQ_NEXT(control, next);
5476                         while (ctl) {
5477                                 if ((ctl->stcb != control->stcb) && (ctl->length) &&
5478                                     (ctl->some_taken ||
5479                                     (ctl->spec_flags & M_NOTIFICATION) ||
5480                                     ((ctl->do_not_ref_stcb == 0) &&
5481                                     (ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))
5482                                     ) {
5483                                         /*-
5484                                          * If we have a different TCB next, and there is data
5485                                          * present. If we have already taken some (pdapi), OR we can
5486                                          * ref the tcb and no delivery as started on this stream, we
5487                                          * take it. Note we allow a notification on a different
5488                                          * assoc to be delivered..
5489                                          */
5490                                         control = ctl;
5491                                         goto found_one;
5492                                 } else if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS)) &&
5493                                             (ctl->length) &&
5494                                             ((ctl->some_taken) ||
5495                                             ((ctl->do_not_ref_stcb == 0) &&
5496                                             ((ctl->spec_flags & M_NOTIFICATION) == 0) &&
5497                                     (ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))) {
5498                                         /*-
5499                                          * If we have the same tcb, and there is data present, and we
5500                                          * have the strm interleave feature present. Then if we have
5501                                          * taken some (pdapi) or we can refer to tht tcb AND we have
5502                                          * not started a delivery for this stream, we can take it.
5503                                          * Note we do NOT allow a notificaiton on the same assoc to
5504                                          * be delivered.
5505                                          */
5506                                         control = ctl;
5507                                         goto found_one;
5508                                 }
5509                                 ctl = TAILQ_NEXT(ctl, next);
5510                         }
5511                 }
5512                 /*
5513                  * if we reach here, not suitable replacement is available
5514                  * <or> fragment interleave is NOT on. So stuff the sb_cc
5515                  * into the our held count, and its time to sleep again.
5516                  */
5517                 held_length = so->so_rcv.sb_cc;
5518                 control->held_length = so->so_rcv.sb_cc;
5519                 goto restart;
5520         }
5521         /* Clear the held length since there is something to read */
5522         control->held_length = 0;
5523         if (hold_rlock) {
5524                 SCTP_INP_READ_UNLOCK(inp);
5525                 hold_rlock = 0;
5526         }
5527 found_one:
5528         /*
5529          * If we reach here, control has a some data for us to read off.
5530          * Note that stcb COULD be NULL.
5531          */
5532         control->some_taken++;
5533         if (hold_sblock) {
5534                 SOCKBUF_UNLOCK(&so->so_rcv);
5535                 hold_sblock = 0;
5536         }
5537         stcb = control->stcb;
5538         if (stcb) {
5539                 if ((control->do_not_ref_stcb == 0) &&
5540                     (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5541                         if (freecnt_applied == 0)
5542                                 stcb = NULL;
5543                 } else if (control->do_not_ref_stcb == 0) {
5544                         /* you can't free it on me please */
5545                         /*
5546                          * The lock on the socket buffer protects us so the
5547                          * free code will stop. But since we used the
5548                          * socketbuf lock and the sender uses the tcb_lock
5549                          * to increment, we need to use the atomic add to
5550                          * the refcnt
5551                          */
5552                         if (freecnt_applied) {
5553 #ifdef INVARIANTS
5554                                 panic("refcnt already incremented");
5555 #else
5556                                 SCTP_PRINTF("refcnt already incremented?\n");
5557 #endif
5558                         } else {
5559                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5560                                 freecnt_applied = 1;
5561                         }
5562                         /*
5563                          * Setup to remember how much we have not yet told
5564                          * the peer our rwnd has opened up. Note we grab the
5565                          * value from the tcb from last time. Note too that
5566                          * sack sending clears this when a sack is sent,
5567                          * which is fine. Once we hit the rwnd_req, we then
5568                          * will go to the sctp_user_rcvd() that will not
5569                          * lock until it KNOWs it MUST send a WUP-SACK.
5570                          */
5571                         freed_so_far = stcb->freed_by_sorcv_sincelast;
5572                         stcb->freed_by_sorcv_sincelast = 0;
5573                 }
5574         }
5575         if (stcb &&
5576             ((control->spec_flags & M_NOTIFICATION) == 0) &&
5577             control->do_not_ref_stcb == 0) {
5578                 stcb->asoc.strmin[control->sinfo_stream].delivery_started = 1;
5579         }
5580         /* First lets get off the sinfo and sockaddr info */
5581         if ((sinfo) && filling_sinfo) {
5582                 memcpy(sinfo, control, sizeof(struct sctp_nonpad_sndrcvinfo));
5583                 nxt = TAILQ_NEXT(control, next);
5584                 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) ||
5585                     sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) {
5586                         struct sctp_extrcvinfo *s_extra;
5587
5588                         s_extra = (struct sctp_extrcvinfo *)sinfo;
5589                         if ((nxt) &&
5590                             (nxt->length)) {
5591                                 s_extra->sreinfo_next_flags = SCTP_NEXT_MSG_AVAIL;
5592                                 if (nxt->sinfo_flags & SCTP_UNORDERED) {
5593                                         s_extra->sreinfo_next_flags |= SCTP_NEXT_MSG_IS_UNORDERED;
5594                                 }
5595                                 if (nxt->spec_flags & M_NOTIFICATION) {
5596                                         s_extra->sreinfo_next_flags |= SCTP_NEXT_MSG_IS_NOTIFICATION;
5597                                 }
5598                                 s_extra->sreinfo_next_aid = nxt->sinfo_assoc_id;
5599                                 s_extra->sreinfo_next_length = nxt->length;
5600                                 s_extra->sreinfo_next_ppid = nxt->sinfo_ppid;
5601                                 s_extra->sreinfo_next_stream = nxt->sinfo_stream;
5602                                 if (nxt->tail_mbuf != NULL) {
5603                                         if (nxt->end_added) {
5604                                                 s_extra->sreinfo_next_flags |= SCTP_NEXT_MSG_ISCOMPLETE;
5605                                         }
5606                                 }
5607                         } else {
5608                                 /*
5609                                  * we explicitly 0 this, since the memcpy
5610                                  * got some other things beyond the older
5611                                  * sinfo_ that is on the control's structure
5612                                  * :-D
5613                                  */
5614                                 nxt = NULL;
5615                                 s_extra->sreinfo_next_flags = SCTP_NO_NEXT_MSG;
5616                                 s_extra->sreinfo_next_aid = 0;
5617                                 s_extra->sreinfo_next_length = 0;
5618                                 s_extra->sreinfo_next_ppid = 0;
5619                                 s_extra->sreinfo_next_stream = 0;
5620                         }
5621                 }
5622                 /*
5623                  * update off the real current cum-ack, if we have an stcb.
5624                  */
5625                 if ((control->do_not_ref_stcb == 0) && stcb)
5626                         sinfo->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
5627                 /*
5628                  * mask off the high bits, we keep the actual chunk bits in
5629                  * there.
5630                  */
5631                 sinfo->sinfo_flags &= 0x00ff;
5632                 if ((control->sinfo_flags >> 8) & SCTP_DATA_UNORDERED) {
5633                         sinfo->sinfo_flags |= SCTP_UNORDERED;
5634                 }
5635         }
5636 #ifdef SCTP_ASOCLOG_OF_TSNS
5637         {
5638                 int index, newindex;
5639                 struct sctp_pcbtsn_rlog *entry;
5640
5641                 do {
5642                         index = inp->readlog_index;
5643                         newindex = index + 1;
5644                         if (newindex >= SCTP_READ_LOG_SIZE) {
5645                                 newindex = 0;
5646                         }
5647                 } while (atomic_cmpset_int(&inp->readlog_index, index, newindex) == 0);
5648                 entry = &inp->readlog[index];
5649                 entry->vtag = control->sinfo_assoc_id;
5650                 entry->strm = control->sinfo_stream;
5651                 entry->seq = control->sinfo_ssn;
5652                 entry->sz = control->length;
5653                 entry->flgs = control->sinfo_flags;
5654         }
5655 #endif
5656         if (fromlen && from) {
5657                 cp_len = min((size_t)fromlen, (size_t)control->whoFrom->ro._l_addr.sa.sa_len);
5658                 switch (control->whoFrom->ro._l_addr.sa.sa_family) {
5659 #ifdef INET6
5660                 case AF_INET6:
5661                         ((struct sockaddr_in6 *)from)->sin6_port = control->port_from;
5662                         break;
5663 #endif
5664 #ifdef INET
5665                 case AF_INET:
5666                         ((struct sockaddr_in *)from)->sin_port = control->port_from;
5667                         break;
5668 #endif
5669                 default:
5670                         break;
5671                 }
5672                 memcpy(from, &control->whoFrom->ro._l_addr, cp_len);
5673
5674 #if defined(INET) && defined(INET6)
5675                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) &&
5676                     (from->sa_family == AF_INET) &&
5677                     ((size_t)fromlen >= sizeof(struct sockaddr_in6))) {
5678                         struct sockaddr_in *sin;
5679                         struct sockaddr_in6 sin6;
5680
5681                         sin = (struct sockaddr_in *)from;
5682                         bzero(&sin6, sizeof(sin6));
5683                         sin6.sin6_family = AF_INET6;
5684                         sin6.sin6_len = sizeof(struct sockaddr_in6);
5685                         sin6.sin6_addr.s6_addr32[2] = htonl(0xffff);
5686                         bcopy(&sin->sin_addr,
5687                             &sin6.sin6_addr.s6_addr32[3],
5688                             sizeof(sin6.sin6_addr.s6_addr32[3]));
5689                         sin6.sin6_port = sin->sin_port;
5690                         memcpy(from, &sin6, sizeof(struct sockaddr_in6));
5691                 }
5692 #endif
5693 #ifdef INET6
5694                 {
5695                         struct sockaddr_in6 lsa6, *from6;
5696
5697                         from6 = (struct sockaddr_in6 *)from;
5698                         sctp_recover_scope_mac(from6, (&lsa6));
5699                 }
5700 #endif
5701         }
5702         /* now copy out what data we can */
5703         if (mp == NULL) {
5704                 /* copy out each mbuf in the chain up to length */
5705 get_more_data:
5706                 m = control->data;
5707                 while (m) {
5708                         /* Move out all we can */
5709                         cp_len = (int)uio->uio_resid;
5710                         my_len = (int)SCTP_BUF_LEN(m);
5711                         if (cp_len > my_len) {
5712                                 /* not enough in this buf */
5713                                 cp_len = my_len;
5714                         }
5715                         if (hold_rlock) {
5716                                 SCTP_INP_READ_UNLOCK(inp);
5717                                 hold_rlock = 0;
5718                         }
5719                         if (cp_len > 0)
5720                                 error = uiomove(mtod(m, char *), cp_len, uio);
5721                         /* re-read */
5722                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5723                                 goto release;
5724                         }
5725                         if ((control->do_not_ref_stcb == 0) && stcb &&
5726                             stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
5727                                 no_rcv_needed = 1;
5728                         }
5729                         if (error) {
5730                                 /* error we are out of here */
5731                                 goto release;
5732                         }
5733                         if ((SCTP_BUF_NEXT(m) == NULL) &&
5734                             (cp_len >= SCTP_BUF_LEN(m)) &&
5735                             ((control->end_added == 0) ||
5736                             (control->end_added &&
5737                             (TAILQ_NEXT(control, next) == NULL)))
5738                             ) {
5739                                 SCTP_INP_READ_LOCK(inp);
5740                                 hold_rlock = 1;
5741                         }
5742                         if (cp_len == SCTP_BUF_LEN(m)) {
5743                                 if ((SCTP_BUF_NEXT(m) == NULL) &&
5744                                     (control->end_added)) {
5745                                         out_flags |= MSG_EOR;
5746                                         if ((control->do_not_ref_stcb == 0) &&
5747                                             (control->stcb != NULL) &&
5748                                             ((control->spec_flags & M_NOTIFICATION) == 0))
5749                                                 control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
5750                                 }
5751                                 if (control->spec_flags & M_NOTIFICATION) {
5752                                         out_flags |= MSG_NOTIFICATION;
5753                                 }
5754                                 /* we ate up the mbuf */
5755                                 if (in_flags & MSG_PEEK) {
5756                                         /* just looking */
5757                                         m = SCTP_BUF_NEXT(m);
5758                                         copied_so_far += cp_len;
5759                                 } else {
5760                                         /* dispose of the mbuf */
5761                                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
5762                                                 sctp_sblog(&so->so_rcv,
5763                                                     control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
5764                                         }
5765                                         sctp_sbfree(control, stcb, &so->so_rcv, m);
5766                                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
5767                                                 sctp_sblog(&so->so_rcv,
5768                                                     control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
5769                                         }
5770                                         copied_so_far += cp_len;
5771                                         freed_so_far += cp_len;
5772                                         freed_so_far += MSIZE;
5773                                         atomic_subtract_int(&control->length, cp_len);
5774                                         control->data = sctp_m_free(m);
5775                                         m = control->data;
5776                                         /*
5777                                          * been through it all, must hold sb
5778                                          * lock ok to null tail
5779                                          */
5780                                         if (control->data == NULL) {
5781 #ifdef INVARIANTS
5782                                                 if ((control->end_added == 0) ||
5783                                                     (TAILQ_NEXT(control, next) == NULL)) {
5784                                                         /*
5785                                                          * If the end is not
5786                                                          * added, OR the
5787                                                          * next is NOT null
5788                                                          * we MUST have the
5789                                                          * lock.
5790                                                          */
5791                                                         if (mtx_owned(&inp->inp_rdata_mtx) == 0) {
5792                                                                 panic("Hmm we don't own the lock?");
5793                                                         }
5794                                                 }
5795 #endif
5796                                                 control->tail_mbuf = NULL;
5797 #ifdef INVARIANTS
5798                                                 if ((control->end_added) && ((out_flags & MSG_EOR) == 0)) {
5799                                                         panic("end_added, nothing left and no MSG_EOR");
5800                                                 }
5801 #endif
5802                                         }
5803                                 }
5804                         } else {
5805                                 /* Do we need to trim the mbuf? */
5806                                 if (control->spec_flags & M_NOTIFICATION) {
5807                                         out_flags |= MSG_NOTIFICATION;
5808                                 }
5809                                 if ((in_flags & MSG_PEEK) == 0) {
5810                                         SCTP_BUF_RESV_UF(m, cp_len);
5811                                         SCTP_BUF_LEN(m) -= cp_len;
5812                                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
5813                                                 sctp_sblog(&so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, cp_len);
5814                                         }
5815                                         atomic_subtract_int(&so->so_rcv.sb_cc, cp_len);
5816                                         if ((control->do_not_ref_stcb == 0) &&
5817                                             stcb) {
5818                                                 atomic_subtract_int(&stcb->asoc.sb_cc, cp_len);
5819                                         }
5820                                         copied_so_far += cp_len;
5821                                         freed_so_far += cp_len;
5822                                         freed_so_far += MSIZE;
5823                                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
5824                                                 sctp_sblog(&so->so_rcv, control->do_not_ref_stcb ? NULL : stcb,
5825                                                     SCTP_LOG_SBRESULT, 0);
5826                                         }
5827                                         atomic_subtract_int(&control->length, cp_len);
5828                                 } else {
5829                                         copied_so_far += cp_len;
5830                                 }
5831                         }
5832                         if ((out_flags & MSG_EOR) || (uio->uio_resid == 0)) {
5833                                 break;
5834                         }
5835                         if (((stcb) && (in_flags & MSG_PEEK) == 0) &&
5836                             (control->do_not_ref_stcb == 0) &&
5837                             (freed_so_far >= rwnd_req)) {
5838                                 sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
5839                         }
5840                 }               /* end while(m) */
5841                 /*
5842                  * At this point we have looked at it all and we either have
5843                  * a MSG_EOR/or read all the user wants... <OR>
5844                  * control->length == 0.
5845                  */
5846                 if ((out_flags & MSG_EOR) && ((in_flags & MSG_PEEK) == 0)) {
5847                         /* we are done with this control */
5848                         if (control->length == 0) {
5849                                 if (control->data) {
5850 #ifdef INVARIANTS
5851                                         panic("control->data not null at read eor?");
5852 #else
5853                                         SCTP_PRINTF("Strange, data left in the control buffer .. invarients would panic?\n");
5854                                         sctp_m_freem(control->data);
5855                                         control->data = NULL;
5856 #endif
5857                                 }
5858                 done_with_control:
5859                                 if (TAILQ_NEXT(control, next) == NULL) {
5860                                         /*
5861                                          * If we don't have a next we need a
5862                                          * lock, if there is a next
5863                                          * interrupt is filling ahead of us
5864                                          * and we don't need a lock to
5865                                          * remove this guy (which is the
5866                                          * head of the queue).
5867                                          */
5868                                         if (hold_rlock == 0) {
5869                                                 SCTP_INP_READ_LOCK(inp);
5870                                                 hold_rlock = 1;
5871                                         }
5872                                 }
5873                                 TAILQ_REMOVE(&inp->read_queue, control, next);
5874                                 /* Add back any hiddend data */
5875                                 if (control->held_length) {
5876                                         held_length = 0;
5877                                         control->held_length = 0;
5878                                         wakeup_read_socket = 1;
5879                                 }
5880                                 if (control->aux_data) {
5881                                         sctp_m_free(control->aux_data);
5882                                         control->aux_data = NULL;
5883                                 }
5884                                 no_rcv_needed = control->do_not_ref_stcb;
5885                                 sctp_free_remote_addr(control->whoFrom);
5886                                 control->data = NULL;
5887                                 sctp_free_a_readq(stcb, control);
5888                                 control = NULL;
5889                                 if ((freed_so_far >= rwnd_req) &&
5890                                     (no_rcv_needed == 0))
5891                                         sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
5892
5893                         } else {
5894                                 /*
5895                                  * The user did not read all of this
5896                                  * message, turn off the returned MSG_EOR
5897                                  * since we are leaving more behind on the
5898                                  * control to read.
5899                                  */
5900 #ifdef INVARIANTS
5901                                 if (control->end_added &&
5902                                     (control->data == NULL) &&
5903                                     (control->tail_mbuf == NULL)) {
5904                                         panic("Gak, control->length is corrupt?");
5905                                 }
5906 #endif
5907                                 no_rcv_needed = control->do_not_ref_stcb;
5908                                 out_flags &= ~MSG_EOR;
5909                         }
5910                 }
5911                 if (out_flags & MSG_EOR) {
5912                         goto release;
5913                 }
5914                 if ((uio->uio_resid == 0) ||
5915                     ((in_eeor_mode) &&
5916                     (copied_so_far >= (uint32_t) max(so->so_rcv.sb_lowat, 1)))) {
5917                         goto release;
5918                 }
5919                 /*
5920                  * If I hit here the receiver wants more and this message is
5921                  * NOT done (pd-api). So two questions. Can we block? if not
5922                  * we are done. Did the user NOT set MSG_WAITALL?
5923                  */
5924                 if (block_allowed == 0) {
5925                         goto release;
5926                 }
5927                 /*
5928                  * We need to wait for more data a few things: - We don't
5929                  * sbunlock() so we don't get someone else reading. - We
5930                  * must be sure to account for the case where what is added
5931                  * is NOT to our control when we wakeup.
5932                  */
5933
5934                 /*
5935                  * Do we need to tell the transport a rwnd update might be
5936                  * needed before we go to sleep?
5937                  */
5938                 if (((stcb) && (in_flags & MSG_PEEK) == 0) &&
5939                     ((freed_so_far >= rwnd_req) &&
5940                     (control->do_not_ref_stcb == 0) &&
5941                     (no_rcv_needed == 0))) {
5942                         sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
5943                 }
5944 wait_some_more:
5945                 if (so->so_rcv.sb_state & SBS_CANTRCVMORE) {
5946                         goto release;
5947                 }
5948                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)
5949                         goto release;
5950
5951                 if (hold_rlock == 1) {
5952                         SCTP_INP_READ_UNLOCK(inp);
5953                         hold_rlock = 0;
5954                 }
5955                 if (hold_sblock == 0) {
5956                         SOCKBUF_LOCK(&so->so_rcv);
5957                         hold_sblock = 1;
5958                 }
5959                 if ((copied_so_far) && (control->length == 0) &&
5960                     (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE))) {
5961                         goto release;
5962                 }
5963                 if (so->so_rcv.sb_cc <= control->held_length) {
5964                         error = sbwait(&so->so_rcv);
5965                         if (error) {
5966                                 goto release;
5967                         }
5968                         control->held_length = 0;
5969                 }
5970                 if (hold_sblock) {
5971                         SOCKBUF_UNLOCK(&so->so_rcv);
5972                         hold_sblock = 0;
5973                 }
5974                 if (control->length == 0) {
5975                         /* still nothing here */
5976                         if (control->end_added == 1) {
5977                                 /* he aborted, or is done i.e.did a shutdown */
5978                                 out_flags |= MSG_EOR;
5979                                 if (control->pdapi_aborted) {
5980                                         if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0))
5981                                                 control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
5982
5983                                         out_flags |= MSG_TRUNC;
5984                                 } else {
5985                                         if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0))
5986                                                 control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
5987                                 }
5988                                 goto done_with_control;
5989                         }
5990                         if (so->so_rcv.sb_cc > held_length) {
5991                                 control->held_length = so->so_rcv.sb_cc;
5992                                 held_length = 0;
5993                         }
5994                         goto wait_some_more;
5995                 } else if (control->data == NULL) {
5996                         /*
5997                          * we must re-sync since data is probably being
5998                          * added
5999                          */
6000                         SCTP_INP_READ_LOCK(inp);
6001                         if ((control->length > 0) && (control->data == NULL)) {
6002                                 /*
6003                                  * big trouble.. we have the lock and its
6004                                  * corrupt?
6005                                  */
6006 #ifdef INVARIANTS
6007                                 panic("Impossible data==NULL length !=0");
6008 #endif
6009                                 out_flags |= MSG_EOR;
6010                                 out_flags |= MSG_TRUNC;
6011                                 control->length = 0;
6012                                 SCTP_INP_READ_UNLOCK(inp);
6013                                 goto done_with_control;
6014                         }
6015                         SCTP_INP_READ_UNLOCK(inp);
6016                         /* We will fall around to get more data */
6017                 }
6018                 goto get_more_data;
6019         } else {
6020                 /*-
6021                  * Give caller back the mbuf chain,
6022                  * store in uio_resid the length
6023                  */
6024                 wakeup_read_socket = 0;
6025                 if ((control->end_added == 0) ||
6026                     (TAILQ_NEXT(control, next) == NULL)) {
6027                         /* Need to get rlock */
6028                         if (hold_rlock == 0) {
6029                                 SCTP_INP_READ_LOCK(inp);
6030                                 hold_rlock = 1;
6031                         }
6032                 }
6033                 if (control->end_added) {
6034                         out_flags |= MSG_EOR;
6035                         if ((control->do_not_ref_stcb == 0) &&
6036                             (control->stcb != NULL) &&
6037                             ((control->spec_flags & M_NOTIFICATION) == 0))
6038                                 control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
6039                 }
6040                 if (control->spec_flags & M_NOTIFICATION) {
6041                         out_flags |= MSG_NOTIFICATION;
6042                 }
6043                 uio->uio_resid = control->length;
6044                 *mp = control->data;
6045                 m = control->data;
6046                 while (m) {
6047                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
6048                                 sctp_sblog(&so->so_rcv,
6049                                     control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
6050                         }
6051                         sctp_sbfree(control, stcb, &so->so_rcv, m);
6052                         freed_so_far += SCTP_BUF_LEN(m);
6053                         freed_so_far += MSIZE;
6054                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
6055                                 sctp_sblog(&so->so_rcv,
6056                                     control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
6057                         }
6058                         m = SCTP_BUF_NEXT(m);
6059                 }
6060                 control->data = control->tail_mbuf = NULL;
6061                 control->length = 0;
6062                 if (out_flags & MSG_EOR) {
6063                         /* Done with this control */
6064                         goto done_with_control;
6065                 }
6066         }
6067 release:
6068         if (hold_rlock == 1) {
6069                 SCTP_INP_READ_UNLOCK(inp);
6070                 hold_rlock = 0;
6071         }
6072         if (hold_sblock == 1) {
6073                 SOCKBUF_UNLOCK(&so->so_rcv);
6074                 hold_sblock = 0;
6075         }
6076         sbunlock(&so->so_rcv);
6077         sockbuf_lock = 0;
6078
6079 release_unlocked:
6080         if (hold_sblock) {
6081                 SOCKBUF_UNLOCK(&so->so_rcv);
6082                 hold_sblock = 0;
6083         }
6084         if ((stcb) && (in_flags & MSG_PEEK) == 0) {
6085                 if ((freed_so_far >= rwnd_req) &&
6086                     (control && (control->do_not_ref_stcb == 0)) &&
6087                     (no_rcv_needed == 0))
6088                         sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
6089         }
6090 out:
6091         if (msg_flags) {
6092                 *msg_flags = out_flags;
6093         }
6094         if (((out_flags & MSG_EOR) == 0) &&
6095             ((in_flags & MSG_PEEK) == 0) &&
6096             (sinfo) &&
6097             (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) ||
6098             sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO))) {
6099                 struct sctp_extrcvinfo *s_extra;
6100
6101                 s_extra = (struct sctp_extrcvinfo *)sinfo;
6102                 s_extra->sreinfo_next_flags = SCTP_NO_NEXT_MSG;
6103         }
6104         if (hold_rlock == 1) {
6105                 SCTP_INP_READ_UNLOCK(inp);
6106         }
6107         if (hold_sblock) {
6108                 SOCKBUF_UNLOCK(&so->so_rcv);
6109         }
6110         if (sockbuf_lock) {
6111                 sbunlock(&so->so_rcv);
6112         }
6113         if (freecnt_applied) {
6114                 /*
6115                  * The lock on the socket buffer protects us so the free
6116                  * code will stop. But since we used the socketbuf lock and
6117                  * the sender uses the tcb_lock to increment, we need to use
6118                  * the atomic add to the refcnt.
6119                  */
6120                 if (stcb == NULL) {
6121 #ifdef INVARIANTS
6122                         panic("stcb for refcnt has gone NULL?");
6123                         goto stage_left;
6124 #else
6125                         goto stage_left;
6126 #endif
6127                 }
6128                 atomic_add_int(&stcb->asoc.refcnt, -1);
6129                 /* Save the value back for next time */
6130                 stcb->freed_by_sorcv_sincelast = freed_so_far;
6131         }
6132         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) {
6133                 if (stcb) {
6134                         sctp_misc_ints(SCTP_SORECV_DONE,
6135                             freed_so_far,
6136                             ((uio) ? (slen - uio->uio_resid) : slen),
6137                             stcb->asoc.my_rwnd,
6138                             so->so_rcv.sb_cc);
6139                 } else {
6140                         sctp_misc_ints(SCTP_SORECV_DONE,
6141                             freed_so_far,
6142                             ((uio) ? (slen - uio->uio_resid) : slen),
6143                             0,
6144                             so->so_rcv.sb_cc);
6145                 }
6146         }
6147 stage_left:
6148         if (wakeup_read_socket) {
6149                 sctp_sorwakeup(inp, so);
6150         }
6151         return (error);
6152 }
6153
6154
6155 #ifdef SCTP_MBUF_LOGGING
6156 struct mbuf *
6157 sctp_m_free(struct mbuf *m)
6158 {
6159         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6160                 if (SCTP_BUF_IS_EXTENDED(m)) {
6161                         sctp_log_mb(m, SCTP_MBUF_IFREE);
6162                 }
6163         }
6164         return (m_free(m));
6165 }
6166
6167 void
6168 sctp_m_freem(struct mbuf *mb)
6169 {
6170         while (mb != NULL)
6171                 mb = sctp_m_free(mb);
6172 }
6173
6174 #endif
6175
6176 int
6177 sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id)
6178 {
6179         /*
6180          * Given a local address. For all associations that holds the
6181          * address, request a peer-set-primary.
6182          */
6183         struct sctp_ifa *ifa;
6184         struct sctp_laddr *wi;
6185
6186         ifa = sctp_find_ifa_by_addr(sa, vrf_id, 0);
6187         if (ifa == NULL) {
6188                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EADDRNOTAVAIL);
6189                 return (EADDRNOTAVAIL);
6190         }
6191         /*
6192          * Now that we have the ifa we must awaken the iterator with this
6193          * message.
6194          */
6195         wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
6196         if (wi == NULL) {
6197                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
6198                 return (ENOMEM);
6199         }
6200         /* Now incr the count and int wi structure */
6201         SCTP_INCR_LADDR_COUNT();
6202         bzero(wi, sizeof(*wi));
6203         (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
6204         wi->ifa = ifa;
6205         wi->action = SCTP_SET_PRIM_ADDR;
6206         atomic_add_int(&ifa->refcount, 1);
6207
6208         /* Now add it to the work queue */
6209         SCTP_WQ_ADDR_LOCK();
6210         /*
6211          * Should this really be a tailq? As it is we will process the
6212          * newest first :-0
6213          */
6214         LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
6215         SCTP_WQ_ADDR_UNLOCK();
6216         sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
6217             (struct sctp_inpcb *)NULL,
6218             (struct sctp_tcb *)NULL,
6219             (struct sctp_nets *)NULL);
6220         return (0);
6221 }
6222
6223
6224 int
6225 sctp_soreceive(struct socket *so,
6226     struct sockaddr **psa,
6227     struct uio *uio,
6228     struct mbuf **mp0,
6229     struct mbuf **controlp,
6230     int *flagsp)
6231 {
6232         int error, fromlen;
6233         uint8_t sockbuf[256];
6234         struct sockaddr *from;
6235         struct sctp_extrcvinfo sinfo;
6236         int filling_sinfo = 1;
6237         struct sctp_inpcb *inp;
6238
6239         inp = (struct sctp_inpcb *)so->so_pcb;
6240         /* pickup the assoc we are reading from */
6241         if (inp == NULL) {
6242                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6243                 return (EINVAL);
6244         }
6245         if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT) &&
6246             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVRCVINFO) &&
6247             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) ||
6248             (controlp == NULL)) {
6249                 /* user does not want the sndrcv ctl */
6250                 filling_sinfo = 0;
6251         }
6252         if (psa) {
6253                 from = (struct sockaddr *)sockbuf;
6254                 fromlen = sizeof(sockbuf);
6255                 from->sa_len = 0;
6256         } else {
6257                 from = NULL;
6258                 fromlen = 0;
6259         }
6260
6261         if (filling_sinfo) {
6262                 memset(&sinfo, 0, sizeof(struct sctp_extrcvinfo));
6263         }
6264         error = sctp_sorecvmsg(so, uio, mp0, from, fromlen, flagsp,
6265             (struct sctp_sndrcvinfo *)&sinfo, filling_sinfo);
6266         if (controlp != NULL) {
6267                 /* copy back the sinfo in a CMSG format */
6268                 if (filling_sinfo)
6269                         *controlp = sctp_build_ctl_nchunk(inp,
6270                             (struct sctp_sndrcvinfo *)&sinfo);
6271                 else
6272                         *controlp = NULL;
6273         }
6274         if (psa) {
6275                 /* copy back the address info */
6276                 if (from && from->sa_len) {
6277                         *psa = sodupsockaddr(from, M_NOWAIT);
6278                 } else {
6279                         *psa = NULL;
6280                 }
6281         }
6282         return (error);
6283 }
6284
6285
6286
6287
6288
6289 int
6290 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
6291     int totaddr, int *error)
6292 {
6293         int added = 0;
6294         int i;
6295         struct sctp_inpcb *inp;
6296         struct sockaddr *sa;
6297         size_t incr = 0;
6298
6299 #ifdef INET
6300         struct sockaddr_in *sin;
6301
6302 #endif
6303 #ifdef INET6
6304         struct sockaddr_in6 *sin6;
6305
6306 #endif
6307
6308         sa = addr;
6309         inp = stcb->sctp_ep;
6310         *error = 0;
6311         for (i = 0; i < totaddr; i++) {
6312                 switch (sa->sa_family) {
6313 #ifdef INET
6314                 case AF_INET:
6315                         incr = sizeof(struct sockaddr_in);
6316                         sin = (struct sockaddr_in *)sa;
6317                         if ((sin->sin_addr.s_addr == INADDR_ANY) ||
6318                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
6319                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
6320                                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6321                                 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_7);
6322                                 *error = EINVAL;
6323                                 goto out_now;
6324                         }
6325                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
6326                                 /* assoc gone no un-lock */
6327                                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
6328                                 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_7);
6329                                 *error = ENOBUFS;
6330                                 goto out_now;
6331                         }
6332                         added++;
6333                         break;
6334 #endif
6335 #ifdef INET6
6336                 case AF_INET6:
6337                         incr = sizeof(struct sockaddr_in6);
6338                         sin6 = (struct sockaddr_in6 *)sa;
6339                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
6340                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
6341                                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6342                                 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_8);
6343                                 *error = EINVAL;
6344                                 goto out_now;
6345                         }
6346                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
6347                                 /* assoc gone no un-lock */
6348                                 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
6349                                 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_8);
6350                                 *error = ENOBUFS;
6351                                 goto out_now;
6352                         }
6353                         added++;
6354                         break;
6355 #endif
6356                 default:
6357                         break;
6358                 }
6359                 sa = (struct sockaddr *)((caddr_t)sa + incr);
6360         }
6361 out_now:
6362         return (added);
6363 }
6364
6365 struct sctp_tcb *
6366 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
6367     int *totaddr, int *num_v4, int *num_v6, int *error,
6368     int limit, int *bad_addr)
6369 {
6370         struct sockaddr *sa;
6371         struct sctp_tcb *stcb = NULL;
6372         size_t incr, at, i;
6373
6374         at = incr = 0;
6375         sa = addr;
6376
6377         *error = *num_v6 = *num_v4 = 0;
6378         /* account and validate addresses */
6379         for (i = 0; i < (size_t)*totaddr; i++) {
6380                 switch (sa->sa_family) {
6381 #ifdef INET
6382                 case AF_INET:
6383                         (*num_v4) += 1;
6384                         incr = sizeof(struct sockaddr_in);
6385                         if (sa->sa_len != incr) {
6386                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6387                                 *error = EINVAL;
6388                                 *bad_addr = 1;
6389                                 return (NULL);
6390                         }
6391                         break;
6392 #endif
6393 #ifdef INET6
6394                 case AF_INET6:
6395                         {
6396                                 struct sockaddr_in6 *sin6;
6397
6398                                 sin6 = (struct sockaddr_in6 *)sa;
6399                                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
6400                                         /* Must be non-mapped for connectx */
6401                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6402                                         *error = EINVAL;
6403                                         *bad_addr = 1;
6404                                         return (NULL);
6405                                 }
6406                                 (*num_v6) += 1;
6407                                 incr = sizeof(struct sockaddr_in6);
6408                                 if (sa->sa_len != incr) {
6409                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6410                                         *error = EINVAL;
6411                                         *bad_addr = 1;
6412                                         return (NULL);
6413                                 }
6414                                 break;
6415                         }
6416 #endif
6417                 default:
6418                         *totaddr = i;
6419                         /* we are done */
6420                         break;
6421                 }
6422                 if (i == (size_t)*totaddr) {
6423                         break;
6424                 }
6425                 SCTP_INP_INCR_REF(inp);
6426                 stcb = sctp_findassociation_ep_addr(&inp, sa, NULL, NULL, NULL);
6427                 if (stcb != NULL) {
6428                         /* Already have or am bring up an association */
6429                         return (stcb);
6430                 } else {
6431                         SCTP_INP_DECR_REF(inp);
6432                 }
6433                 if ((at + incr) > (size_t)limit) {
6434                         *totaddr = i;
6435                         break;
6436                 }
6437                 sa = (struct sockaddr *)((caddr_t)sa + incr);
6438         }
6439         return ((struct sctp_tcb *)NULL);
6440 }
6441
6442 /*
6443  * sctp_bindx(ADD) for one address.
6444  * assumes all arguments are valid/checked by caller.
6445  */
6446 void
6447 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
6448     struct sockaddr *sa, sctp_assoc_t assoc_id,
6449     uint32_t vrf_id, int *error, void *p)
6450 {
6451         struct sockaddr *addr_touse;
6452
6453 #ifdef INET6
6454         struct sockaddr_in sin;
6455
6456 #endif
6457
6458         /* see if we're bound all already! */
6459         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6460                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6461                 *error = EINVAL;
6462                 return;
6463         }
6464         addr_touse = sa;
6465 #ifdef INET6
6466         if (sa->sa_family == AF_INET6) {
6467                 struct sockaddr_in6 *sin6;
6468
6469                 if (sa->sa_len != sizeof(struct sockaddr_in6)) {
6470                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6471                         *error = EINVAL;
6472                         return;
6473                 }
6474                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
6475                         /* can only bind v6 on PF_INET6 sockets */
6476                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6477                         *error = EINVAL;
6478                         return;
6479                 }
6480                 sin6 = (struct sockaddr_in6 *)addr_touse;
6481                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
6482                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
6483                             SCTP_IPV6_V6ONLY(inp)) {
6484                                 /* can't bind v4-mapped on PF_INET sockets */
6485                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6486                                 *error = EINVAL;
6487                                 return;
6488                         }
6489                         in6_sin6_2_sin(&sin, sin6);
6490                         addr_touse = (struct sockaddr *)&sin;
6491                 }
6492         }
6493 #endif
6494 #ifdef INET
6495         if (sa->sa_family == AF_INET) {
6496                 if (sa->sa_len != sizeof(struct sockaddr_in)) {
6497                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6498                         *error = EINVAL;
6499                         return;
6500                 }
6501                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
6502                     SCTP_IPV6_V6ONLY(inp)) {
6503                         /* can't bind v4 on PF_INET sockets */
6504                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6505                         *error = EINVAL;
6506                         return;
6507                 }
6508         }
6509 #endif
6510         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
6511                 if (p == NULL) {
6512                         /* Can't get proc for Net/Open BSD */
6513                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6514                         *error = EINVAL;
6515                         return;
6516                 }
6517                 *error = sctp_inpcb_bind(so, addr_touse, NULL, p);
6518                 return;
6519         }
6520         /*
6521          * No locks required here since bind and mgmt_ep_sa all do their own
6522          * locking. If we do something for the FIX: below we may need to
6523          * lock in that case.
6524          */
6525         if (assoc_id == 0) {
6526                 /* add the address */
6527                 struct sctp_inpcb *lep;
6528                 struct sockaddr_in *lsin = (struct sockaddr_in *)addr_touse;
6529
6530                 /* validate the incoming port */
6531                 if ((lsin->sin_port != 0) &&
6532                     (lsin->sin_port != inp->sctp_lport)) {
6533                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6534                         *error = EINVAL;
6535                         return;
6536                 } else {
6537                         /* user specified 0 port, set it to existing port */
6538                         lsin->sin_port = inp->sctp_lport;
6539                 }
6540
6541                 lep = sctp_pcb_findep(addr_touse, 1, 0, vrf_id);
6542                 if (lep != NULL) {
6543                         /*
6544                          * We must decrement the refcount since we have the
6545                          * ep already and are binding. No remove going on
6546                          * here.
6547                          */
6548                         SCTP_INP_DECR_REF(lep);
6549                 }
6550                 if (lep == inp) {
6551                         /* already bound to it.. ok */
6552                         return;
6553                 } else if (lep == NULL) {
6554                         ((struct sockaddr_in *)addr_touse)->sin_port = 0;
6555                         *error = sctp_addr_mgmt_ep_sa(inp, addr_touse,
6556                             SCTP_ADD_IP_ADDRESS,
6557                             vrf_id, NULL);
6558                 } else {
6559                         *error = EADDRINUSE;
6560                 }
6561                 if (*error)
6562                         return;
6563         } else {
6564                 /*
6565                  * FIX: decide whether we allow assoc based bindx
6566                  */
6567         }
6568 }
6569
6570 /*
6571  * sctp_bindx(DELETE) for one address.
6572  * assumes all arguments are valid/checked by caller.
6573  */
6574 void
6575 sctp_bindx_delete_address(struct sctp_inpcb *inp,
6576     struct sockaddr *sa, sctp_assoc_t assoc_id,
6577     uint32_t vrf_id, int *error)
6578 {
6579         struct sockaddr *addr_touse;
6580
6581 #ifdef INET6
6582         struct sockaddr_in sin;
6583
6584 #endif
6585
6586         /* see if we're bound all already! */
6587         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6588                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6589                 *error = EINVAL;
6590                 return;
6591         }
6592         addr_touse = sa;
6593 #ifdef INET6
6594         if (sa->sa_family == AF_INET6) {
6595                 struct sockaddr_in6 *sin6;
6596
6597                 if (sa->sa_len != sizeof(struct sockaddr_in6)) {
6598                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6599                         *error = EINVAL;
6600                         return;
6601                 }
6602                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
6603                         /* can only bind v6 on PF_INET6 sockets */
6604                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6605                         *error = EINVAL;
6606                         return;
6607                 }
6608                 sin6 = (struct sockaddr_in6 *)addr_touse;
6609                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
6610                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
6611                             SCTP_IPV6_V6ONLY(inp)) {
6612                                 /* can't bind mapped-v4 on PF_INET sockets */
6613                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6614                                 *error = EINVAL;
6615                                 return;
6616                         }
6617                         in6_sin6_2_sin(&sin, sin6);
6618                         addr_touse = (struct sockaddr *)&sin;
6619                 }
6620         }
6621 #endif
6622 #ifdef INET
6623         if (sa->sa_family == AF_INET) {
6624                 if (sa->sa_len != sizeof(struct sockaddr_in)) {
6625                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6626                         *error = EINVAL;
6627                         return;
6628                 }
6629                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
6630                     SCTP_IPV6_V6ONLY(inp)) {
6631                         /* can't bind v4 on PF_INET sockets */
6632                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
6633                         *error = EINVAL;
6634                         return;
6635                 }
6636         }
6637 #endif
6638         /*
6639          * No lock required mgmt_ep_sa does its own locking. If the FIX:
6640          * below is ever changed we may need to lock before calling
6641          * association level binding.
6642          */
6643         if (assoc_id == 0) {
6644                 /* delete the address */
6645                 *error = sctp_addr_mgmt_ep_sa(inp, addr_touse,
6646                     SCTP_DEL_IP_ADDRESS,
6647                     vrf_id, NULL);
6648         } else {
6649                 /*
6650                  * FIX: decide whether we allow assoc based bindx
6651                  */
6652         }
6653 }
6654
6655 /*
6656  * returns the valid local address count for an assoc, taking into account
6657  * all scoping rules
6658  */
6659 int
6660 sctp_local_addr_count(struct sctp_tcb *stcb)
6661 {
6662         int loopback_scope;
6663
6664 #if defined(INET)
6665         int ipv4_local_scope, ipv4_addr_legal;
6666
6667 #endif
6668 #if defined (INET6)
6669         int local_scope, site_scope, ipv6_addr_legal;
6670
6671 #endif
6672         struct sctp_vrf *vrf;
6673         struct sctp_ifn *sctp_ifn;
6674         struct sctp_ifa *sctp_ifa;
6675         int count = 0;
6676
6677         /* Turn on all the appropriate scopes */
6678         loopback_scope = stcb->asoc.scope.loopback_scope;
6679 #if defined(INET)
6680         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
6681         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
6682 #endif
6683 #if defined(INET6)
6684         local_scope = stcb->asoc.scope.local_scope;
6685         site_scope = stcb->asoc.scope.site_scope;
6686         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
6687 #endif
6688         SCTP_IPI_ADDR_RLOCK();
6689         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
6690         if (vrf == NULL) {
6691                 /* no vrf, no addresses */
6692                 SCTP_IPI_ADDR_RUNLOCK();
6693                 return (0);
6694         }
6695         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6696                 /*
6697                  * bound all case: go through all ifns on the vrf
6698                  */
6699                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
6700                         if ((loopback_scope == 0) &&
6701                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
6702                                 continue;
6703                         }
6704                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
6705                                 if (sctp_is_addr_restricted(stcb, sctp_ifa))
6706                                         continue;
6707                                 switch (sctp_ifa->address.sa.sa_family) {
6708 #ifdef INET
6709                                 case AF_INET:
6710                                         if (ipv4_addr_legal) {
6711                                                 struct sockaddr_in *sin;
6712
6713                                                 sin = &sctp_ifa->address.sin;
6714                                                 if (sin->sin_addr.s_addr == 0) {
6715                                                         /*
6716                                                          * skip unspecified
6717                                                          * addrs
6718                                                          */
6719                                                         continue;
6720                                                 }
6721                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
6722                                                     &sin->sin_addr) != 0) {
6723                                                         continue;
6724                                                 }
6725                                                 if ((ipv4_local_scope == 0) &&
6726                                                     (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
6727                                                         continue;
6728                                                 }
6729                                                 /* count this one */
6730                                                 count++;
6731                                         } else {
6732                                                 continue;
6733                                         }
6734                                         break;
6735 #endif
6736 #ifdef INET6
6737                                 case AF_INET6:
6738                                         if (ipv6_addr_legal) {
6739                                                 struct sockaddr_in6 *sin6;
6740
6741                                                 sin6 = &sctp_ifa->address.sin6;
6742                                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
6743                                                         continue;
6744                                                 }
6745                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
6746                                                     &sin6->sin6_addr) != 0) {
6747                                                         continue;
6748                                                 }
6749                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
6750                                                         if (local_scope == 0)
6751                                                                 continue;
6752                                                         if (sin6->sin6_scope_id == 0) {
6753                                                                 if (sa6_recoverscope(sin6) != 0)
6754                                                                         /*
6755                                                                          *
6756                                                                          * bad
6757                                                                          *
6758                                                                          * li
6759                                                                          * nk
6760                                                                          *
6761                                                                          * loc
6762                                                                          * al
6763                                                                          *
6764                                                                          * add
6765                                                                          * re
6766                                                                          * ss
6767                                                                          * */
6768                                                                         continue;
6769                                                         }
6770                                                 }
6771                                                 if ((site_scope == 0) &&
6772                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
6773                                                         continue;
6774                                                 }
6775                                                 /* count this one */
6776                                                 count++;
6777                                         }
6778                                         break;
6779 #endif
6780                                 default:
6781                                         /* TSNH */
6782                                         break;
6783                                 }
6784                         }
6785                 }
6786         } else {
6787                 /*
6788                  * subset bound case
6789                  */
6790                 struct sctp_laddr *laddr;
6791
6792                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list,
6793                     sctp_nxt_addr) {
6794                         if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
6795                                 continue;
6796                         }
6797                         /* count this one */
6798                         count++;
6799                 }
6800         }
6801         SCTP_IPI_ADDR_RUNLOCK();
6802         return (count);
6803 }
6804
6805 #if defined(SCTP_LOCAL_TRACE_BUF)
6806
6807 void
6808 sctp_log_trace(uint32_t subsys, const char *str SCTP_UNUSED, uint32_t a, uint32_t b, uint32_t c, uint32_t d, uint32_t e, uint32_t f)
6809 {
6810         uint32_t saveindex, newindex;
6811
6812         do {
6813                 saveindex = SCTP_BASE_SYSCTL(sctp_log).index;
6814                 if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
6815                         newindex = 1;
6816                 } else {
6817                         newindex = saveindex + 1;
6818                 }
6819         } while (atomic_cmpset_int(&SCTP_BASE_SYSCTL(sctp_log).index, saveindex, newindex) == 0);
6820         if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
6821                 saveindex = 0;
6822         }
6823         SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].timestamp = SCTP_GET_CYCLECOUNT;
6824         SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].subsys = subsys;
6825         SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[0] = a;
6826         SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[1] = b;
6827         SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[2] = c;
6828         SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[3] = d;
6829         SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[4] = e;
6830         SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[5] = f;
6831 }
6832
6833 #endif
6834 static void
6835 sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *ignored,
6836     const struct sockaddr *sa SCTP_UNUSED, void *ctx SCTP_UNUSED)
6837 {
6838         struct ip *iph;
6839
6840 #ifdef INET6
6841         struct ip6_hdr *ip6;
6842
6843 #endif
6844         struct mbuf *sp, *last;
6845         struct udphdr *uhdr;
6846         uint16_t port;
6847
6848         if ((m->m_flags & M_PKTHDR) == 0) {
6849                 /* Can't handle one that is not a pkt hdr */
6850                 goto out;
6851         }
6852         /* Pull the src port */
6853         iph = mtod(m, struct ip *);
6854         uhdr = (struct udphdr *)((caddr_t)iph + off);
6855         port = uhdr->uh_sport;
6856         /*
6857          * Split out the mbuf chain. Leave the IP header in m, place the
6858          * rest in the sp.
6859          */
6860         sp = m_split(m, off, M_NOWAIT);
6861         if (sp == NULL) {
6862                 /* Gak, drop packet, we can't do a split */
6863                 goto out;
6864         }
6865         if (sp->m_pkthdr.len < sizeof(struct udphdr) + sizeof(struct sctphdr)) {
6866                 /* Gak, packet can't have an SCTP header in it - too small */
6867                 m_freem(sp);
6868                 goto out;
6869         }
6870         /* Now pull up the UDP header and SCTP header together */
6871         sp = m_pullup(sp, sizeof(struct udphdr) + sizeof(struct sctphdr));
6872         if (sp == NULL) {
6873                 /* Gak pullup failed */
6874                 goto out;
6875         }
6876         /* Trim out the UDP header */
6877         m_adj(sp, sizeof(struct udphdr));
6878
6879         /* Now reconstruct the mbuf chain */
6880         for (last = m; last->m_next; last = last->m_next);
6881         last->m_next = sp;
6882         m->m_pkthdr.len += sp->m_pkthdr.len;
6883         iph = mtod(m, struct ip *);
6884         switch (iph->ip_v) {
6885 #ifdef INET
6886         case IPVERSION:
6887                 iph->ip_len = htons(ntohs(iph->ip_len) - sizeof(struct udphdr));
6888                 sctp_input_with_port(m, off, port);
6889                 break;
6890 #endif
6891 #ifdef INET6
6892         case IPV6_VERSION >> 4:
6893                 ip6 = mtod(m, struct ip6_hdr *);
6894                 ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) - sizeof(struct udphdr));
6895                 sctp6_input_with_port(&m, &off, port);
6896                 break;
6897 #endif
6898         default:
6899                 goto out;
6900                 break;
6901         }
6902         return;
6903 out:
6904         m_freem(m);
6905 }
6906
6907 void
6908 sctp_over_udp_stop(void)
6909 {
6910         /*
6911          * This function assumes sysctl caller holds sctp_sysctl_info_lock()
6912          * for writting!
6913          */
6914 #ifdef INET
6915         if (SCTP_BASE_INFO(udp4_tun_socket) != NULL) {
6916                 soclose(SCTP_BASE_INFO(udp4_tun_socket));
6917                 SCTP_BASE_INFO(udp4_tun_socket) = NULL;
6918         }
6919 #endif
6920 #ifdef INET6
6921         if (SCTP_BASE_INFO(udp6_tun_socket) != NULL) {
6922                 soclose(SCTP_BASE_INFO(udp6_tun_socket));
6923                 SCTP_BASE_INFO(udp6_tun_socket) = NULL;
6924         }
6925 #endif
6926 }
6927
6928 int
6929 sctp_over_udp_start(void)
6930 {
6931         uint16_t port;
6932         int ret;
6933
6934 #ifdef INET
6935         struct sockaddr_in sin;
6936
6937 #endif
6938 #ifdef INET6
6939         struct sockaddr_in6 sin6;
6940
6941 #endif
6942         /*
6943          * This function assumes sysctl caller holds sctp_sysctl_info_lock()
6944          * for writting!
6945          */
6946         port = SCTP_BASE_SYSCTL(sctp_udp_tunneling_port);
6947         if (ntohs(port) == 0) {
6948                 /* Must have a port set */
6949                 return (EINVAL);
6950         }
6951 #ifdef INET
6952         if (SCTP_BASE_INFO(udp4_tun_socket) != NULL) {
6953                 /* Already running -- must stop first */
6954                 return (EALREADY);
6955         }
6956 #endif
6957 #ifdef INET6
6958         if (SCTP_BASE_INFO(udp6_tun_socket) != NULL) {
6959                 /* Already running -- must stop first */
6960                 return (EALREADY);
6961         }
6962 #endif
6963 #ifdef INET
6964         if ((ret = socreate(PF_INET, &SCTP_BASE_INFO(udp4_tun_socket),
6965             SOCK_DGRAM, IPPROTO_UDP,
6966             curthread->td_ucred, curthread))) {
6967                 sctp_over_udp_stop();
6968                 return (ret);
6969         }
6970         /* Call the special UDP hook. */
6971         if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp4_tun_socket),
6972             sctp_recv_udp_tunneled_packet, NULL))) {
6973                 sctp_over_udp_stop();
6974                 return (ret);
6975         }
6976         /* Ok, we have a socket, bind it to the port. */
6977         memset(&sin, 0, sizeof(struct sockaddr_in));
6978         sin.sin_len = sizeof(struct sockaddr_in);
6979         sin.sin_family = AF_INET;
6980         sin.sin_port = htons(port);
6981         if ((ret = sobind(SCTP_BASE_INFO(udp4_tun_socket),
6982             (struct sockaddr *)&sin, curthread))) {
6983                 sctp_over_udp_stop();
6984                 return (ret);
6985         }
6986 #endif
6987 #ifdef INET6
6988         if ((ret = socreate(PF_INET6, &SCTP_BASE_INFO(udp6_tun_socket),
6989             SOCK_DGRAM, IPPROTO_UDP,
6990             curthread->td_ucred, curthread))) {
6991                 sctp_over_udp_stop();
6992                 return (ret);
6993         }
6994         /* Call the special UDP hook. */
6995         if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp6_tun_socket),
6996             sctp_recv_udp_tunneled_packet, NULL))) {
6997                 sctp_over_udp_stop();
6998                 return (ret);
6999         }
7000         /* Ok, we have a socket, bind it to the port. */
7001         memset(&sin6, 0, sizeof(struct sockaddr_in6));
7002         sin6.sin6_len = sizeof(struct sockaddr_in6);
7003         sin6.sin6_family = AF_INET6;
7004         sin6.sin6_port = htons(port);
7005         if ((ret = sobind(SCTP_BASE_INFO(udp6_tun_socket),
7006             (struct sockaddr *)&sin6, curthread))) {
7007                 sctp_over_udp_stop();
7008                 return (ret);
7009         }
7010 #endif
7011         return (0);
7012 }