sys/netinet/sctp_pcb.h

   1 /*      $KAME: sctp_pcb.h,v 1.19 2004/08/17 06:28:02 t-momose Exp $     */
   2 /*      $DragonFly: src/sys/netinet/sctp_pcb.h,v 1.3 2006/05/20 02:42:12 dillon Exp $   */
   3
   4 /*
   5  * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Cisco Systems, Inc.
  19  * 4. Neither the name of the project nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #ifndef _NETINET_SCTP_PCB_H_
  37 #define _NETINET_SCTP_PCB_H_
  38
  39 #ifndef _NETINET_IN_PCB_H_
  40 #include <netinet/in_pcb.h>
  41 #endif
  42
  43 /*
  44  * We must have V6 so the size of the proto can be calculated. Otherwise
  45  * we would not allocate enough for Net/Open BSD :-<
  46  */
  47 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
  48 #include <net/pfil.h>
  49 #endif
  50 #include <net/if.h>
  51 #ifdef __FreeBSD__
  52 #include <net/if_var.h>
  53 #endif
  54 #include <netinet/ip6.h>
  55 #include <netinet6/ip6_var.h>
  56 #include <netinet6/ip6protosw.h>
  57 #include <netinet6/in6_var.h>
  58 #if defined(__OpenBSD__)
  59 #include <netinet/in_pcb.h>
  60 #else
  61 #include <netinet6/in6_pcb.h>
  62 #endif
  63
  64 #if defined(__OpenBSD__) || defined(__FreeBSD__)
  65 #ifndef in6pcb
  66 #define in6pcb          inpcb
  67 #endif
  68 #endif
  69
  70 #include <netinet/sctp.h>
  71 #include <netinet/sctp_constants.h>
  72
  73 LIST_HEAD(sctppcbhead, sctp_inpcb);
  74 LIST_HEAD(sctpasochead, sctp_tcb);
  75 TAILQ_HEAD(sctpsocketq, sctp_socket_q_list);
  76 LIST_HEAD(sctpvtaghead, sctp_tagblock);
  77
  78 #include <netinet/sctp_structs.h>
  79 #include <netinet/sctp_uio.h>
  80
  81 /*
  82  * PCB flags
  83  */
  84 #define SCTP_PCB_FLAGS_UDPTYPE          0x00000001
  85 #define SCTP_PCB_FLAGS_TCPTYPE          0x00000002
  86 #define SCTP_PCB_FLAGS_BOUNDALL         0x00000004
  87 #define SCTP_PCB_FLAGS_ACCEPTING        0x00000008
  88 #define SCTP_PCB_FLAGS_UNBOUND          0x00000010
  89 #define SCTP_PCB_FLAGS_DO_ASCONF        0x00000020
  90 #define SCTP_PCB_FLAGS_AUTO_ASCONF      0x00000040
  91 /* socket options */
  92 #define SCTP_PCB_FLAGS_NODELAY          0x00000100
  93 #define SCTP_PCB_FLAGS_AUTOCLOSE        0x00000200
  94 #define SCTP_PCB_FLAGS_RECVDATAIOEVNT   0x00000400
  95 #define SCTP_PCB_FLAGS_RECVASSOCEVNT    0x00000800
  96 #define SCTP_PCB_FLAGS_RECVPADDREVNT    0x00001000
  97 #define SCTP_PCB_FLAGS_RECVPEERERR      0x00002000
  98 #define SCTP_PCB_FLAGS_RECVSENDFAILEVNT 0x00004000
  99 #define SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT 0x00008000
 100 #define SCTP_PCB_FLAGS_ADAPTIONEVNT     0x00010000
 101 #define SCTP_PCB_FLAGS_PDAPIEVNT        0x00020000
 102 #define SCTP_PCB_FLAGS_STREAM_RESETEVNT 0x00040000
 103 #define SCTP_PCB_FLAGS_NO_FRAGMENT      0x00080000
 104 /* TCP model support */
 105 #define SCTP_PCB_FLAGS_CONNECTED        0x00100000
 106 #define SCTP_PCB_FLAGS_IN_TCPPOOL       0x00200000
 107 #define SCTP_PCB_FLAGS_DONT_WAKE        0x00400000
 108 #define SCTP_PCB_FLAGS_WAKEOUTPUT       0x00800000
 109 #define SCTP_PCB_FLAGS_WAKEINPUT        0x01000000
 110 #define SCTP_PCB_FLAGS_BOUND_V6         0x02000000
 111 #define SCTP_PCB_FLAGS_NEEDS_MAPPED_V4  0x04000000
 112 #define SCTP_PCB_FLAGS_BLOCKING_IO      0x08000000
 113 #define SCTP_PCB_FLAGS_SOCKET_GONE      0x10000000
 114 #define SCTP_PCB_FLAGS_SOCKET_ALLGONE   0x20000000
 115
 116 /* flags to copy to new PCB */
 117 #define SCTP_PCB_COPY_FLAGS             0x0707ff64
 118
 119 #define SCTP_PCBHASH_ALLADDR(port, mask) (port & mask)
 120 #define SCTP_PCBHASH_ASOC(tag, mask) (tag & mask)
 121
 122 struct sctp_laddr {
 123         LIST_ENTRY(sctp_laddr) sctp_nxt_addr;   /* next in list */
 124         struct ifaddr *ifa;
 125 };
 126
 127 struct sctp_timewait {
 128         uint32_t tv_sec_at_expire;      /* the seconds from boot to expire */
 129         uint32_t v_tag;         /* the vtag that can not be reused */
 130 };
 131
 132 struct sctp_tagblock {
 133         LIST_ENTRY(sctp_tagblock) sctp_nxt_tagblock;
 134         struct sctp_timewait vtag_block[SCTP_NUMBER_IN_VTAG_BLOCK];
 135 };
 136
 137 struct sctp_epinfo {
 138         struct sctpasochead *sctp_asochash;
 139         u_long hashasocmark;
 140
 141         struct sctppcbhead *sctp_ephash;
 142         u_long hashmark;
 143
 144         /*
 145          * The TCP model represents a substantial overhead in that we get
 146          * an additional hash table to keep explicit connections in. The
 147          * listening TCP endpoint will exist in the usual ephash above and
 148          * accept only INIT's. It will be incapable of sending off an INIT.
 149          * When a dg arrives we must look in the normal ephash. If we find
 150          * a TCP endpoint that will tell us to go to the specific endpoint
 151          * hash and re-hash to find the right assoc/socket. If we find a
 152          * UDP model socket we then must complete the lookup. If this fails,
 153          * i.e. no association can be found then we must continue to see if
 154          * a sctp_peeloff()'d socket is in the tcpephash (a spun off socket
 155          * acts like a TCP model connected socket).
 156          */
 157         struct sctppcbhead *sctp_tcpephash;
 158         u_long hashtcpmark;
 159         uint32_t hashtblsize;
 160
 161         struct sctppcbhead listhead;
 162
 163         struct sctpiterators iteratorhead;
 164
 165         /* ep zone info */
 166 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
 167 #if __FreeBSD_version >= 500000
 168         struct uma_zone *ipi_zone_ep;
 169         struct uma_zone *ipi_zone_asoc;
 170         struct uma_zone *ipi_zone_laddr;
 171         struct uma_zone *ipi_zone_net;
 172         struct uma_zone *ipi_zone_chunk;
 173         struct uma_zone *ipi_zone_sockq;
 174 #else
 175         struct vm_zone *ipi_zone_ep;
 176         struct vm_zone *ipi_zone_asoc;
 177         struct vm_zone *ipi_zone_laddr;
 178         struct vm_zone *ipi_zone_net;
 179         struct vm_zone *ipi_zone_chunk;
 180         struct vm_zone *ipi_zone_sockq;
 181 #endif
 182 #endif
 183 #if defined(__NetBSD__) || defined(__OpenBSD__)
 184         struct pool ipi_zone_ep;
 185         struct pool ipi_zone_asoc;
 186         struct pool ipi_zone_laddr;
 187         struct pool ipi_zone_net;
 188         struct pool ipi_zone_chunk;
 189         struct pool ipi_zone_sockq;
 190 #endif
 191
 192 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
 193         struct mtx ipi_ep_mtx;
 194         struct mtx it_mtx;
 195 #endif
 196         u_int ipi_count_ep;
 197         u_quad_t ipi_gencnt_ep;
 198
 199         /* assoc/tcb zone info */
 200         u_int ipi_count_asoc;
 201         u_quad_t ipi_gencnt_asoc;
 202
 203         /* local addrlist zone info */
 204         u_int ipi_count_laddr;
 205         u_quad_t ipi_gencnt_laddr;
 206
 207         /* remote addrlist zone info */
 208         u_int ipi_count_raddr;
 209         u_quad_t ipi_gencnt_raddr;
 210
 211         /* chunk structure list for output */
 212         u_int ipi_count_chunk;
 213         u_quad_t ipi_gencnt_chunk;
 214
 215         /* socket queue zone info */
 216         u_int ipi_count_sockq;
 217         u_quad_t ipi_gencnt_sockq;
 218
 219         struct sctpvtaghead vtag_timewait[SCTP_STACK_VTAG_HASH_SIZE];
 220
 221 #ifdef _SCTP_NEEDS_CALLOUT_
 222         struct calloutlist callqueue;
 223 #endif /* _SCTP_NEEDS_CALLOUT_ */
 224
 225         uint32_t mbuf_track;
 226
 227         /* for port allocations */
 228         uint16_t lastport;
 229         uint16_t lastlow;
 230         uint16_t lasthi;
 231
 232 };
 233
 234 extern uint32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];
 235 /*
 236  * Here we have all the relevant information for each SCTP entity created.
 237  * We will need to modify this as approprate. We also need to figure out
 238  * how to access /dev/random.
 239  */
 240 struct sctp_pcb {
 241         unsigned int time_of_secret_change; /* number of seconds from timeval.tv_sec */
 242         uint32_t secret_key[SCTP_HOW_MANY_SECRETS][SCTP_NUMBER_OF_SECRETS];
 243         unsigned int size_of_a_cookie;
 244
 245         unsigned int sctp_timeoutticks[SCTP_NUM_TMRS];
 246         unsigned int sctp_minrto;
 247         unsigned int sctp_maxrto;
 248         unsigned int initial_rto;
 249
 250         int initial_init_rto_max;
 251
 252         uint32_t sctp_sws_sender;
 253         uint32_t sctp_sws_receiver;
 254
 255         /* various thresholds */
 256         /* Max times I will init at a guy */
 257         uint16_t max_init_times;
 258
 259         /* Max times I will send before we consider someone dead */
 260         uint16_t max_send_times;
 261
 262         uint16_t def_net_failure;
 263
 264         /* number of streams to pre-open on a association */
 265         uint16_t pre_open_stream_count;
 266         uint16_t max_open_streams_intome;
 267
 268         /* random number generator */
 269         uint32_t random_counter;
 270         uint8_t random_numbers[SCTP_SIGNATURE_ALOC_SIZE];
 271         uint8_t random_store[SCTP_SIGNATURE_ALOC_SIZE];
 272
 273         /*
 274          * This timer is kept running per endpoint.  When it fires it
 275          * will change the secret key.  The default is once a hour
 276          */
 277         struct sctp_timer signature_change;
 278         int def_cookie_life;
 279         /* defaults to 0 */
 280         int auto_close_time;
 281         uint32_t initial_sequence_debug;
 282         uint32_t adaption_layer_indicator;
 283         char store_at;
 284         uint8_t max_burst;
 285         char current_secret_number;
 286         char last_secret_number;
 287 };
 288
 289 #ifndef SCTP_ALIGNMENT
 290 #define SCTP_ALIGNMENT 32
 291 #endif
 292
 293 #ifndef SCTP_ALIGNM1
 294 #define SCTP_ALIGNM1 (SCTP_ALIGNMENT-1)
 295 #endif
 296
 297 #define sctp_lport ip_inp.inp.inp_lport
 298
 299 struct sctp_socket_q_list {
 300         struct sctp_tcb *tcb;
 301         TAILQ_ENTRY(sctp_socket_q_list) next_sq;
 302 };
 303
 304 struct sctp_inpcb {
 305         /*
 306          * put an inpcb in front of it all, kind of a waste but we need
 307          * to for compatability with all the other stuff.
 308          */
 309         union {
 310                 struct inpcb inp;
 311                 char align[(sizeof(struct in6pcb) + SCTP_ALIGNM1) &
 312                           ~SCTP_ALIGNM1];
 313         } ip_inp;
 314         LIST_ENTRY(sctp_inpcb) sctp_list;       /* lists all endpoints */
 315         /* hash of all endpoints for model */
 316         LIST_ENTRY(sctp_inpcb) sctp_hash;
 317
 318         /* count of local addresses bound, 0 if bound all */
 319         int laddr_count;
 320         /* list of addrs in use by the EP */
 321         struct sctpladdr sctp_addr_list;
 322         /* used for source address selection rotation */
 323         struct sctp_laddr *next_addr_touse;
 324         struct ifnet *next_ifn_touse;
 325         /* back pointer to our socket */
 326         struct socket *sctp_socket;
 327         uint32_t sctp_flags;                    /* flag set */
 328         struct sctp_pcb sctp_ep;                /* SCTP ep data */
 329         /* head of the hash of all associations */
 330         struct sctpasochead *sctp_tcbhash;
 331         u_long sctp_hashmark;
 332         /* head of the list of all associations */
 333         struct sctpasochead sctp_asoc_list;
 334         /* queue of TCB's waiting to stuff data up the socket */
 335         struct sctpsocketq sctp_queue_list;
 336         void *sctp_tcb_at_block;
 337         struct sctp_iterator *inp_starting_point_for_iterator;
 338         int  error_on_block;
 339         uint32_t sctp_frag_point;
 340         uint32_t sctp_vtag_first;
 341         struct mbuf *pkt, *pkt_last, *sb_last_mpkt;
 342         struct mbuf *control;
 343 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
 344 #ifndef INP_IPV6
 345 #define INP_IPV6        0x1
 346 #endif
 347 #ifndef INP_IPV4
 348 #define INP_IPV4        0x2
 349 #endif
 350         u_char inp_vflag;
 351         u_char inp_ip_ttl;
 352         u_char inp_ip_tos;
 353         u_char inp_ip_resv;
 354 #endif
 355 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
 356         struct mtx inp_mtx;
 357         struct mtx inp_create_mtx;
 358         u_int32_t refcount;
 359 #endif
 360 };
 361
 362 struct sctp_tcb {
 363         struct socket *sctp_socket;             /* back pointer to socket */
 364         struct sctp_inpcb *sctp_ep;             /* back pointer to ep */
 365         LIST_ENTRY(sctp_tcb) sctp_tcbhash;      /* next link in hash table */
 366         LIST_ENTRY(sctp_tcb) sctp_tcblist;      /* list of all of the TCB's */
 367         LIST_ENTRY(sctp_tcb) sctp_asocs;
 368         struct sctp_association asoc;
 369         uint16_t rport;                 /* remote port in network format */
 370         uint16_t resv;
 371 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
 372         struct mtx tcb_mtx;
 373 #endif
 374 };
 375
 376 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
 377
 378 /* General locking concepts:
 379  * The goal of our locking is to of course provide
 380  * consistency and yet minimize overhead. We will
 381  * attempt to use non-recursive locks which are supposed
 382  * to be quite inexpensive. Now in order to do this the goal
 383  * is that most functions are not aware of locking. Once we
 384  * have a TCB we lock it and unlock when we are through. This
 385  * means that the TCB lock is kind-of a "global" lock when
 386  * working on an association. Caution must be used when
 387  * asserting a TCB_LOCK since if we recurse we deadlock.
 388  *
 389  * Most other locks (INP and INFO) attempt to localize
 390  * the locking i.e. we try to contain the lock and
 391  * unlock within the function that needs to lock it. This
 392  * sometimes mean we do extra locks and unlocks and loose
 393  * a bit of efficency, but if the performance statements about
 394  * non-recursive locks are true this should not be a problem.
 395  * One issue that arises with this only lock when needed
 396  * is that if an implicit association setup is done we
 397  * have a problem. If at the time I lookup an association
 398  * I have NULL in the tcb return, by the time I call to
 399  * create the association some other processor could
 400  * have created it. This is what the CREATE lock on
 401  * the endpoint. Places where we will be implicitly
 402  * creating the association OR just creating an association
 403  * (the connect call) will assert the CREATE_INP lock. This
 404  * will assure us that during all the lookup of INP and INFO
 405  * if another creator is also locking/looking up we can
 406  * gate the two to synchronize. So the CREATE_INP lock is
 407  * also another one we must use extreme caution in locking
 408  * to make sure we don't hit a re-entrancy issue.
 409  *
 410  * For non FreeBSD 5.x and above we provide a bunch
 411  * of EMPTY lock macro's so we can blatantly put locks
 412  * everywhere and they reduce to nothing on NetBSD/OpenBSD
 413  * and FreeBSD 4.x
 414  *
 415  */
 416
 417
 418 /* When working with the global SCTP lists we lock and unlock
 419  * the INP_INFO lock. So when we go to lookup an association
 420  * we will want to do a SCTP_INP_INFO_RLOCK() and then when
 421  * we want to add a new association to the sctppcbinfo list's
 422  * we will do a SCTP_INP_INFO_WLOCK().
 423  */
 424
 425 /*
 426  * FIX ME, all locks right now have a
 427  * recursive check/panic to validate that I
 428  * don't have any lock recursion going on.
 429  */
 430
 431 #define SCTP_INP_INFO_LOCK_INIT() \
 432         mtx_init(&sctppcbinfo.ipi_ep_mtx, "sctp", "inp_info", MTX_DEF)
 433
 434 #ifdef xyzzy
 435 #define SCTP_INP_INFO_RLOCK()   do {                                    \
 436              if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))                     \
 437                 panic("INP INFO Recursive Lock-R");                     \
 438              mtx_lock(&sctppcbinfo.ipi_ep_mtx);                         \
 439 } while (0)
 440
 441 #define SCTP_INP_INFO_WLOCK()   do {                                    \
 442              if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))                     \
 443                 panic("INP INFO Recursive Lock-W");                     \
 444              mtx_lock(&sctppcbinfo.ipi_ep_mtx);                         \
 445 } while (0)
 446
 447 #else
 448
 449 void SCTP_INP_INFO_RLOCK(void);
 450 void SCTP_INP_INFO_WLOCK(void);
 451
 452 #endif
 453
 454 #define SCTP_INP_INFO_RUNLOCK()         mtx_unlock(&sctppcbinfo.ipi_ep_mtx)
 455 #define SCTP_INP_INFO_WUNLOCK()         mtx_unlock(&sctppcbinfo.ipi_ep_mtx)
 456
 457 /* The INP locks we will use for locking an SCTP endpoint, so for
 458  * example if we want to change something at the endpoint level for
 459  * example random_store or cookie secrets we lock the INP level.
 460  */
 461 #define SCTP_INP_LOCK_INIT(_inp) \
 462         mtx_init(&(_inp)->inp_mtx, "sctp", "inp", MTX_DEF | MTX_DUPOK)
 463
 464 #define SCTP_ASOC_CREATE_LOCK_INIT(_inp) \
 465         mtx_init(&(_inp)->inp_create_mtx, "sctp", "inp_create", \
 466                  MTX_DEF | MTX_DUPOK)
 467
 468 #define SCTP_INP_LOCK_DESTROY(_inp)     mtx_destroy(&(_inp)->inp_mtx)
 469 #define SCTP_ASOC_CREATE_LOCK_DESTROY(_inp)     mtx_destroy(&(_inp)->inp_create_mtx)
 470
 471 #ifdef xyzzy
 472 #define SCTP_INP_RLOCK(_inp)    do {                                    \
 473         struct sctp_tcb *xx_stcb;                                       \
 474         xx_stcb = LIST_FIRST(&_inp->sctp_asoc_list);                    \
 475         if (xx_stcb)                                                     \
 476               if (mtx_owned(&(xx_stcb)->tcb_mtx))                        \
 477                      panic("I own TCB lock?");                          \
 478         if (mtx_owned(&(_inp)->inp_mtx))                                 \
 479                 panic("INP Recursive Lock-R");                          \
 480         mtx_lock(&(_inp)->inp_mtx);                                     \
 481 } while (0)
 482
 483 #define SCTP_INP_WLOCK(_inp)    do {                                    \
 484         struct sctp_tcb *xx_stcb;                                       \
 485         xx_stcb = LIST_FIRST(&_inp->sctp_asoc_list);                    \
 486         if (xx_stcb)                                                     \
 487               if (mtx_owned(&(xx_stcb)->tcb_mtx))                        \
 488                      panic("I own TCB lock?");                          \
 489         if (mtx_owned(&(_inp)->inp_mtx))                                 \
 490                 panic("INP Recursive Lock-W");                          \
 491         mtx_lock(&(_inp)->inp_mtx);                                     \
 492 } while (0)
 493
 494 #else
 495 void SCTP_INP_RLOCK(struct sctp_inpcb *);
 496 void SCTP_INP_WLOCK(struct sctp_inpcb *);
 497
 498 #endif
 499
 500
 501 #define SCTP_INP_INCR_REF(_inp)        _inp->refcount++
 502
 503 #define SCTP_INP_DECR_REF(_inp)         do {                                 \
 504                                              if (_inp->refcount > 0)          \
 505                                                   _inp->refcount--;          \
 506                                              else                            \
 507                                                   panic("bad inp refcount"); \
 508 }while (0)
 509
 510 #define SCTP_ASOC_CREATE_LOCK(_inp)  do {                               \
 511         if (mtx_owned(&(_inp)->inp_create_mtx))                          \
 512                 panic("INP Recursive CREATE");                          \
 513         mtx_lock(&(_inp)->inp_create_mtx);                              \
 514 } while (0)
 515
 516 #define SCTP_INP_RUNLOCK(_inp)          mtx_unlock(&(_inp)->inp_mtx)
 517 #define SCTP_INP_WUNLOCK(_inp)          mtx_unlock(&(_inp)->inp_mtx)
 518 #define SCTP_ASOC_CREATE_UNLOCK(_inp)   mtx_unlock(&(_inp)->inp_create_mtx)
 519
 520 /* For the majority of things (once we have found the association) we
 521  * will lock the actual association mutex. This will protect all
 522  * the assoiciation level queues and streams and such. We will
 523  * need to lock the socket layer when we stuff data up into
 524  * the receiving sb_mb. I.e. we will need to do an extra
 525  * SOCKBUF_LOCK(&so->so_rcv) even though the association is
 526  * locked.
 527  */
 528
 529 #define SCTP_TCB_LOCK_INIT(_tcb) \
 530         mtx_init(&(_tcb)->tcb_mtx, "sctp", "tcb", MTX_DEF | MTX_DUPOK)
 531 #define SCTP_TCB_LOCK_DESTROY(_tcb)     mtx_destroy(&(_tcb)->tcb_mtx)
 532 #define SCTP_TCB_LOCK(_tcb)  do {                                       \
 533         if (!mtx_owned(&(_tcb->sctp_ep->inp_mtx)))                       \
 534                 panic("TCB locking and no INP lock");                   \
 535         if (mtx_owned(&(_tcb)->tcb_mtx))                                 \
 536                 panic("TCB Lock-recursive");                            \
 537         mtx_lock(&(_tcb)->tcb_mtx);                                     \
 538 } while (0)
 539 #define SCTP_TCB_UNLOCK(_tcb)           mtx_unlock(&(_tcb)->tcb_mtx)
 540
 541 #define SCTP_ITERATOR_LOCK_INIT() \
 542         mtx_init(&sctppcbinfo.it_mtx, "sctp", "iterator", MTX_DEF)
 543 #define SCTP_ITERATOR_LOCK()  do {                                      \
 544         if (mtx_owned(&sctppcbinfo.it_mtx))                              \
 545                 panic("Iterator Lock");                                 \
 546         mtx_lock(&sctppcbinfo.it_mtx);                                  \
 547 } while (0)
 548
 549 #define SCTP_ITERATOR_UNLOCK()          mtx_unlock(&sctppcbinfo.it_mtx)
 550 #define SCTP_ITERATOR_LOCK_DESTROY()    mtx_destroy(&sctppcbinfo.it_mtx)
 551 #else
 552
 553 /* Empty Lock declarations for all other
 554  * platforms pre-process away to nothing.
 555  */
 556
 557 /* Lock for INFO stuff */
 558 #define SCTP_INP_INFO_LOCK_INIT()
 559 #define SCTP_INP_INFO_RLOCK()
 560 #define SCTP_INP_INFO_RLOCK()
 561 #define SCTP_INP_INFO_WLOCK()
 562
 563 #define SCTP_INP_INFO_RUNLOCK()
 564 #define SCTP_INP_INFO_WUNLOCK()
 565 /* Lock for INP */
 566 #define SCTP_INP_LOCK_INIT(_inp)
 567 #define SCTP_INP_LOCK_DESTROY(_inp)
 568 #define SCTP_INP_RLOCK(_inp)
 569 #define SCTP_INP_RUNLOCK(_inp)
 570 #define SCTP_INP_WLOCK(_inp)
 571 #define SCTP_INP_INCR_REF(_inp)
 572 #define SCTP_INP_DECR_REF(_inp)
 573 #define SCTP_INP_WUNLOCK(_inp)
 574 #define SCTP_ASOC_CREATE_LOCK_INIT(_inp)
 575 #define SCTP_ASOC_CREATE_LOCK_DESTROY(_inp)
 576 #define SCTP_ASOC_CREATE_LOCK(_inp)
 577 #define SCTP_ASOC_CREATE_UNLOCK(_inp)
 578 /* Lock for TCB */
 579 #define SCTP_TCB_LOCK_INIT(_tcb)
 580 #define SCTP_TCB_LOCK_DESTROY(_tcb)
 581 #define SCTP_TCB_LOCK(_tcb)
 582 #define SCTP_TCB_UNLOCK(_tcb)
 583 /* socket locks that are not here in other than 5.3 > FreeBSD*/
 584 #define SOCK_LOCK(_so)
 585 #define SOCK_UNLOCK(_so)
 586 #define SOCKBUF_LOCK(_so_buf)
 587 #define SOCKBUF_UNLOCK(_so_buf)
 588 /* iterator locks */
 589 #define SCTP_ITERATOR_LOCK_INIT()
 590 #define SCTP_ITERATOR_LOCK()
 591 #define SCTP_ITERATOR_UNLOCK()
 592 #define SCTP_ITERATOR_LOCK_DESTROY()
 593 #endif
 594
 595 #if defined(_KERNEL) || (defined(__APPLE__) && defined(KERNEL))
 596
 597 extern struct sctp_epinfo sctppcbinfo;
 598 extern int sctp_auto_asconf;
 599
 600 int SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b);
 601
 602 void sctp_fill_pcbinfo(struct sctp_pcbinfo *);
 603
 604 struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *);
 605
 606 struct sctp_inpcb *sctp_pcb_findep(struct sockaddr *, int, int);
 607
 608 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
 609 int sctp_inpcb_bind(struct socket *, struct sockaddr *, struct thread *);
 610 #else
 611 int sctp_inpcb_bind(struct socket *, struct sockaddr *, struct proc *);
 612 #endif
 613
 614 struct sctp_tcb *sctp_findassociation_addr(struct mbuf *, int, int,
 615     struct sctphdr *, struct sctp_chunkhdr *, struct sctp_inpcb **,
 616     struct sctp_nets **);
 617
 618 struct sctp_tcb *sctp_findassociation_addr_sa(struct sockaddr *,
 619         struct sockaddr *, struct sctp_inpcb **, struct sctp_nets **, int);
 620
 621 void sctp_move_pcb_and_assoc(struct sctp_inpcb *, struct sctp_inpcb *,
 622         struct sctp_tcb *);
 623
 624 /*
 625  * For this call ep_addr, the to is the destination endpoint address
 626  * of the peer (relative to outbound). The from field is only used if
 627  * the TCP model is enabled and helps distingush amongst the subset
 628  * bound (non-boundall). The TCP model MAY change the actual ep field,
 629  * this is why it is passed.
 630  */
 631 struct sctp_tcb *sctp_findassociation_ep_addr(struct sctp_inpcb **,
 632         struct sockaddr *, struct sctp_nets **, struct sockaddr *, struct sctp_tcb *);
 633
 634 struct sctp_tcb *sctp_findassociation_ep_asocid(struct sctp_inpcb *, caddr_t);
 635
 636 struct sctp_tcb *sctp_findassociation_ep_asconf(struct mbuf *, int, int,
 637     struct sctphdr *, struct sctp_inpcb **, struct sctp_nets **);
 638
 639 int sctp_inpcb_alloc(struct socket *);
 640
 641
 642 int sctp_is_address_on_local_host(struct sockaddr *addr);
 643
 644 void sctp_inpcb_free(struct sctp_inpcb *, int);
 645
 646 struct sctp_tcb *sctp_aloc_assoc(struct sctp_inpcb *, struct sockaddr *,
 647         int, int *, uint32_t);
 648
 649 void sctp_free_assoc(struct sctp_inpcb *, struct sctp_tcb *);
 650
 651 int sctp_add_local_addr_ep(struct sctp_inpcb *, struct ifaddr *);
 652
 653 int sctp_insert_laddr(struct sctpladdr *, struct ifaddr *);
 654
 655 void sctp_remove_laddr(struct sctp_laddr *);
 656
 657 int sctp_del_local_addr_ep(struct sctp_inpcb *, struct ifaddr *);
 658
 659 int sctp_del_local_addr_ep_sa(struct sctp_inpcb *, struct sockaddr *);
 660
 661 int sctp_add_remote_addr(struct sctp_tcb *, struct sockaddr *, int, int);
 662
 663 int sctp_del_remote_addr(struct sctp_tcb *, struct sockaddr *);
 664
 665 void sctp_pcb_init(void);
 666
 667 void sctp_free_remote_addr(struct sctp_nets *);
 668
 669 int sctp_add_local_addr_assoc(struct sctp_tcb *, struct ifaddr *);
 670
 671 int sctp_del_local_addr_assoc(struct sctp_tcb *, struct ifaddr *);
 672
 673 int sctp_del_local_addr_assoc_sa(struct sctp_tcb *, struct sockaddr *);
 674
 675 int sctp_load_addresses_from_init(struct sctp_tcb *, struct mbuf *, int, int,
 676     int, struct sctphdr *, struct sockaddr *);
 677
 678 int sctp_set_primary_addr(struct sctp_tcb *, struct sockaddr *, struct sctp_nets *);
 679
 680 int sctp_is_vtag_good(struct sctp_inpcb *, uint32_t, struct timeval *);
 681
 682 /*void sctp_drain(void);*/
 683
 684 int sctp_destination_is_reachable(struct sctp_tcb *, struct sockaddr *);
 685
 686 int sctp_add_to_socket_q(struct sctp_inpcb *, struct sctp_tcb *);
 687
 688 struct sctp_tcb *sctp_remove_from_socket_q(struct sctp_inpcb *);
 689
 690
 691 /* Null in last arg inpcb indicate run on ALL ep's. Specific
 692  * inp in last arg indicates run on ONLY assoc's of the
 693  * specified endpoint.
 694  */
 695 int
 696 sctp_initiate_iterator(asoc_func af, uint32_t, uint32_t, void *, uint32_t,
 697                        end_func ef, struct sctp_inpcb *);
 698
 699 #if defined(__APPLE__)
 700 void    sctp_callout_alloc(struct sctp_timer *);
 701 void    sctp_callout_free(struct callout *);
 702 #endif
 703
 704 #ifdef __NetBSD__
 705 extern void in6_sin6_2_sin (struct sockaddr_in *,
 706                             struct sockaddr_in6 *sin6);
 707 #endif
 708
 709 #endif /* _KERNEL */
 710 #endif /* _NETINET_SCTP_PCB_H_ */