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