sys/netproto/atm/atm_aal5.c

   1 /*
   2  *
   3  * ===================================
   4  * HARP  |  Host ATM Research Platform
   5  * ===================================
   6  *
   7  *
   8  * This Host ATM Research Platform ("HARP") file (the "Software") is
   9  * made available by Network Computing Services, Inc. ("NetworkCS")
  10  * "AS IS".  NetworkCS does not provide maintenance, improvements or
  11  * support of any kind.
  12  *
  13  * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
  14  * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
  15  * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
  16  * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
  17  * In no event shall NetworkCS be responsible for any damages, including
  18  * but not limited to consequential damages, arising from or relating to
  19  * any use of the Software or related support.
  20  *
  21  * Copyright 1994-1998 Network Computing Services, Inc.
  22  *
  23  * Copies of this Software may be made, however, the above copyright
  24  * notice must be reproduced on all copies.
  25  *
  26  *      @(#) $FreeBSD: src/sys/netatm/atm_aal5.c,v 1.6 1999/10/09 23:24:59 green Exp $
  27  *      @(#) $DragonFly: src/sys/netproto/atm/atm_aal5.c,v 1.13 2007/04/22 01:13:15 dillon Exp $
  28  */
  29
  30 /*
  31  * Core ATM Services
  32  * -----------------
  33  *
  34  * ATM AAL5 socket protocol processing
  35  *
  36  */
  37
  38 #include "kern_include.h"
  39 #include <sys/stat.h>
  40
  41 /*
  42  * Global variables
  43  */
  44 u_long          atm_aal5_sendspace = 64 * 1024; /* XXX */
  45 u_long          atm_aal5_recvspace = 64 * 1024; /* XXX */
  46
  47
  48 /*
  49  * Local functions
  50  */
  51 static int      atm_aal5_attach (struct socket *, int,
  52                         struct pru_attach_info *);
  53 static int      atm_aal5_detach (struct socket *);
  54 static int      atm_aal5_bind (struct socket *, struct sockaddr *,
  55                         struct thread *);
  56 static int      atm_aal5_listen (struct socket *, struct thread *);
  57 static int      atm_aal5_connect (struct socket *, struct sockaddr *,
  58                         struct thread *);
  59 static int      atm_aal5_accept (struct socket *, struct sockaddr **);
  60 static int      atm_aal5_disconnect (struct socket *);
  61 static int      atm_aal5_shutdown (struct socket *);
  62 static int      atm_aal5_send (struct socket *, int, KBuffer *,
  63                         struct sockaddr *, KBuffer *, struct thread *);
  64 static int      atm_aal5_abort (struct socket *);
  65 static int      atm_aal5_control (struct socket *, u_long, caddr_t,
  66                         struct ifnet *, struct thread *);
  67 static int      atm_aal5_sense (struct socket *, struct stat *);
  68 static int      atm_aal5_sockaddr (struct socket *, struct sockaddr **);
  69 static int      atm_aal5_peeraddr (struct socket *, struct sockaddr **);
  70 static int      atm_aal5_incoming (void *, Atm_connection *,
  71                         Atm_attributes *, void **);
  72 static void     atm_aal5_cpcs_data (void *, KBuffer *);
  73 static caddr_t  atm_aal5_getname (void *);
  74
  75
  76 /*
  77  * New-style socket request routines
  78  */
  79 struct pr_usrreqs       atm_aal5_usrreqs = {
  80         .pru_abort = atm_aal5_abort,
  81         .pru_accept = atm_aal5_accept,
  82         .pru_attach = atm_aal5_attach,
  83         .pru_bind = atm_aal5_bind,
  84         .pru_connect = atm_aal5_connect,
  85         .pru_connect2 = pru_connect2_notsupp,
  86         .pru_control = atm_aal5_control,
  87         .pru_detach = atm_aal5_detach,
  88         .pru_disconnect = atm_aal5_disconnect,
  89         .pru_listen = atm_aal5_listen,
  90         .pru_peeraddr = atm_aal5_peeraddr,
  91         .pru_rcvd = pru_rcvd_notsupp,
  92         .pru_rcvoob = pru_rcvoob_notsupp,
  93         .pru_send = atm_aal5_send,
  94         .pru_sense = atm_aal5_sense,
  95         .pru_shutdown = atm_aal5_shutdown,
  96         .pru_sockaddr = atm_aal5_sockaddr,
  97         .pru_sosend = sosend,
  98         .pru_soreceive = soreceive,
  99         .pru_sopoll = sopoll
 100 };
 101
 102 /*
 103  * Local variables
 104  */
 105 static Atm_endpoint     atm_aal5_endpt = {
 106         NULL,
 107         ENDPT_SOCK_AAL5,
 108         NULL,
 109         atm_aal5_getname,
 110         atm_sock_connected,
 111         atm_sock_cleared,
 112         atm_aal5_incoming,
 113         NULL,
 114         NULL,
 115         NULL,
 116         atm_aal5_cpcs_data,
 117         NULL,
 118         NULL,
 119         NULL,
 120         NULL
 121 };
 122
 123 static Atm_attributes   atm_aal5_defattr = {
 124         NULL,                   /* nif */
 125         CMAPI_CPCS,             /* api */
 126         0,                      /* api_init */
 127         0,                      /* headin */
 128         0,                      /* headout */
 129         {                       /* aal */
 130                 T_ATM_PRESENT,
 131                 ATM_AAL5
 132         },
 133         {                       /* traffic */
 134                 T_ATM_ABSENT,
 135         },
 136         {                       /* bearer */
 137                 T_ATM_ABSENT,
 138         },
 139         {                       /* bhli */
 140                 T_ATM_ABSENT
 141         },
 142         {                       /* blli */
 143                 T_ATM_ABSENT,
 144                 T_ATM_ABSENT,
 145         },
 146         {                       /* llc */
 147                 T_ATM_ABSENT,
 148         },
 149         {                       /* called */
 150                 T_ATM_ABSENT,
 151                 {
 152                         T_ATM_ABSENT,
 153                         0
 154                 },
 155                 {
 156                         T_ATM_ABSENT,
 157                         0
 158                 }
 159         },
 160         {                       /* calling */
 161                 T_ATM_ABSENT
 162         },
 163         {                       /* qos */
 164                 T_ATM_ABSENT,
 165         },
 166         {                       /* transit */
 167                 T_ATM_ABSENT
 168         },
 169         {                       /* cause */
 170                 T_ATM_ABSENT
 171         }
 172 };
 173
 174
 175 /*
 176  * Handy common code macros
 177  */
 178 #ifdef DIAGNOSTIC
 179 #define ATM_INTRO(f)                                            \
 180         int             err = 0;                                \
 181         crit_enter();                                           \
 182         ATM_DEBUG2("aal5 socket %s (%p)\n", f, so);             \
 183         /*                                                      \
 184          * Stack queue should have been drained                 \
 185          */                                                     \
 186         if (atm_stackq_head != NULL)                            \
 187                 panic("atm_aal5: stack queue not empty");       \
 188         ;
 189 #else /* !DIAGNOSTIC */
 190 #define ATM_INTRO(f)                                            \
 191         int             err = 0;                                \
 192         crit_enter();                                           \
 193         ;
 194 #endif /* DIAGNOSTIC */
 195
 196 #define ATM_OUTRO()                                             \
 197         /*                                                      \
 198          * Drain any deferred calls                             \
 199          */                                                     \
 200         STACK_DRAIN();                                          \
 201         crit_exit();                                            \
 202         return (err);                                           \
 203         ;
 204
 205 #define ATM_RETERR(error) {                                     \
 206         err = error;                                            \
 207         goto out;                                               \
 208 }
 209
 210
 211 /*
 212  * Attach protocol to socket
 213  *
 214  * Arguments:
 215  *      so      pointer to socket
 216  *      proto   protocol identifier
 217  *      p       pointer to process
 218  *
 219  * Returns:
 220  *      0       request processed
 221  *      error   error processing request - reason indicated
 222  *
 223  */
 224 static int
 225 atm_aal5_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 226 {
 227         Atm_pcb         *atp;
 228
 229         ATM_INTRO("attach");
 230
 231         /*
 232          * Do general attach stuff
 233          */
 234         err = atm_sock_attach(so, atm_aal5_sendspace, atm_aal5_recvspace,
 235                               ai->sb_rlimit);
 236         if (err)
 237                 ATM_RETERR(err);
 238
 239         /*
 240          * Finish up any protocol specific stuff
 241          */
 242         atp = sotoatmpcb(so);
 243         atp->atp_type = ATPT_AAL5;
 244
 245         /*
 246          * Set default connection attributes
 247          */
 248         atp->atp_attr = atm_aal5_defattr;
 249         strncpy(atp->atp_name, "(AAL5)", T_ATM_APP_NAME_LEN);
 250
 251 out:
 252         ATM_OUTRO();
 253 }
 254
 255
 256 /*
 257  * Detach protocol from socket
 258  *
 259  * Arguments:
 260  *      so      pointer to socket
 261  *
 262  * Returns:
 263  *      0       request processed
 264  *      error   error processing request - reason indicated
 265  *
 266  */
 267 static int
 268 atm_aal5_detach(struct socket *so)
 269 {
 270         ATM_INTRO("detach");
 271
 272         err = atm_sock_detach(so);
 273
 274         ATM_OUTRO();
 275 }
 276
 277
 278 /*
 279  * Bind address to socket
 280  *
 281  * Arguments:
 282  *      so      pointer to socket
 283  *      addr    pointer to protocol address
 284  *      p       pointer to process
 285  *
 286  * Returns:
 287  *      0       request processed
 288  *      error   error processing request - reason indicated
 289  *
 290  */
 291 static int
 292 atm_aal5_bind(struct socket *so, struct sockaddr *addr, struct thread *td)
 293 {
 294         ATM_INTRO("bind");
 295
 296         err = atm_sock_bind(so, addr);
 297
 298         ATM_OUTRO();
 299 }
 300
 301
 302 /*
 303  * Listen for incoming connections
 304  *
 305  * Arguments:
 306  *      so      pointer to socket
 307  *      p       pointer to process
 308  *
 309  * Returns:
 310  *      0       request processed
 311  *      error   error processing request - reason indicated
 312  *
 313  */
 314 static int
 315 atm_aal5_listen(struct socket *so, struct thread *td)
 316 {
 317         ATM_INTRO("listen");
 318
 319         err = atm_sock_listen(so, &atm_aal5_endpt);
 320
 321         ATM_OUTRO();
 322 }
 323
 324
 325 /*
 326  * Connect socket to peer
 327  *
 328  * Arguments:
 329  *      so      pointer to socket
 330  *      addr    pointer to protocol address
 331  *      p       pointer to process
 332  *
 333  * Returns:
 334  *      0       request processed
 335  *      error   error processing request - reason indicated
 336  *
 337  */
 338 static int
 339 atm_aal5_connect(struct socket *so, struct sockaddr *addr, thread_t td)
 340 {
 341         Atm_pcb         *atp;
 342
 343         ATM_INTRO("connect");
 344
 345         atp = sotoatmpcb(so);
 346
 347         /*
 348          * Resize send socket buffer to maximum sdu size
 349          */
 350         if (atp->atp_attr.aal.tag == T_ATM_PRESENT) {
 351                 long    size;
 352
 353                 size = atp->atp_attr.aal.v.aal5.forward_max_SDU_size;
 354                 if (size != T_ATM_ABSENT)
 355                         if (!ssb_reserve(&so->so_snd, size, so,
 356                                        &td->td_proc->p_rlimit[RLIMIT_SBSIZE])) {
 357                                 err = ENOBUFS;
 358                                 ATM_OUTRO();
 359                         }
 360
 361         }
 362
 363         /*
 364          * Now get the socket connected
 365          */
 366         err = atm_sock_connect(so, addr, &atm_aal5_endpt);
 367
 368         ATM_OUTRO();
 369 }
 370
 371
 372 /*
 373  * Accept pending connection
 374  *
 375  * Arguments:
 376  *      so      pointer to socket
 377  *      addr    pointer to pointer to contain protocol address
 378  *
 379  * Returns:
 380  *      0       request processed
 381  *      error   error processing request - reason indicated
 382  *
 383  */
 384 static int
 385 atm_aal5_accept(struct socket *so, struct sockaddr **addr)
 386 {
 387         ATM_INTRO("accept");
 388
 389         /*
 390          * Everything is pretty much done already, we just need to
 391          * return the caller's address to the user.
 392          */
 393         err = atm_sock_peeraddr(so, addr);
 394
 395         ATM_OUTRO();
 396 }
 397
 398
 399 /*
 400  * Disconnect connected socket
 401  *
 402  * Arguments:
 403  *      so      pointer to socket
 404  *
 405  * Returns:
 406  *      0       request processed
 407  *      error   error processing request - reason indicated
 408  *
 409  */
 410 static int
 411 atm_aal5_disconnect(struct socket *so)
 412 {
 413         ATM_INTRO("disconnect");
 414
 415         err = atm_sock_disconnect(so);
 416
 417         ATM_OUTRO();
 418 }
 419
 420
 421 /*
 422  * Shut down socket data transmission
 423  *
 424  * Arguments:
 425  *      so      pointer to socket
 426  *
 427  * Returns:
 428  *      0       request processed
 429  *      error   error processing request - reason indicated
 430  *
 431  */
 432 static int
 433 atm_aal5_shutdown(struct socket *so)
 434 {
 435         ATM_INTRO("shutdown");
 436
 437         socantsendmore(so);
 438
 439         ATM_OUTRO();
 440 }
 441
 442
 443 /*
 444  * Send user data
 445  *
 446  * Arguments:
 447  *      so      pointer to socket
 448  *      flags   send data flags
 449  *      m       pointer to buffer containing user data
 450  *      addr    pointer to protocol address
 451  *      control pointer to buffer containing protocol control data
 452  *      p       pointer to process
 453  *
 454  * Returns:
 455  *      0       request processed
 456  *      error   error processing request - reason indicated
 457  *
 458  */
 459 static int
 460 atm_aal5_send(
 461         struct socket   *so,
 462         int             flags,
 463         KBuffer         *m,
 464         struct sockaddr *addr,
 465         KBuffer         *control,
 466         struct thread   *td
 467 ) {
 468         Atm_pcb         *atp;
 469
 470         ATM_INTRO("send");
 471
 472         /*
 473          * We don't support any control functions
 474          */
 475         if (control) {
 476                 int     clen;
 477
 478                 clen = KB_LEN(control);
 479                 KB_FREEALL(control);
 480                 if (clen) {
 481                         KB_FREEALL(m);
 482                         ATM_RETERR(EINVAL);
 483                 }
 484         }
 485
 486         /*
 487          * We also don't support any flags or send-level addressing
 488          */
 489         if (flags || addr) {
 490                 KB_FREEALL(m);
 491                 ATM_RETERR(EINVAL);
 492         }
 493
 494         /*
 495          * All we've got left is the data, so push it out
 496          */
 497         atp = sotoatmpcb(so);
 498         err = atm_cm_cpcs_data(atp->atp_conn, m);
 499         if (err) {
 500                 /*
 501                  * Output problem, drop packet
 502                  */
 503                 atm_sock_stat.as_outdrop[atp->atp_type]++;
 504                 KB_FREEALL(m);
 505         }
 506
 507 out:
 508         ATM_OUTRO();
 509 }
 510
 511
 512 /*
 513  * Abnormally terminate service
 514  *
 515  * Arguments:
 516  *      so      pointer to socket
 517  *
 518  * Returns:
 519  *      0       request processed
 520  *      error   error processing request - reason indicated
 521  *
 522  */
 523 static int
 524 atm_aal5_abort(struct socket *so)
 525 {
 526         ATM_INTRO("abort");
 527
 528         so->so_error = ECONNABORTED;
 529         err = atm_sock_detach(so);
 530
 531         ATM_OUTRO();
 532 }
 533
 534
 535 /*
 536  * Do control operation - ioctl system call
 537  *
 538  * Arguments:
 539  *      so      pointer to socket
 540  *      cmd     ioctl code
 541  *      data    pointer to code specific parameter data area
 542  *      ifp     pointer to ifnet structure if it's an interface ioctl
 543  *      p       pointer to process
 544  *
 545  * Returns:
 546  *      0       request processed
 547  *      error   error processing request - reason indicated
 548  *
 549  */
 550 static int
 551 atm_aal5_control(
 552         struct socket   *so,
 553         u_long          cmd,
 554         caddr_t         data,
 555         struct ifnet    *ifp,
 556         struct thread   *td
 557 ) {
 558         ATM_INTRO("control");
 559
 560         switch (cmd) {
 561
 562         default:
 563                 err = EOPNOTSUPP;
 564         }
 565
 566         ATM_OUTRO();
 567 }
 568
 569 /*
 570  * Sense socket status - fstat system call
 571  *
 572  * Arguments:
 573  *      so      pointer to socket
 574  *      st      pointer to file status structure
 575  *
 576  * Returns:
 577  *      0       request processed
 578  *      error   error processing request - reason indicated
 579  *
 580  */
 581 static int
 582 atm_aal5_sense(struct socket *so, struct stat *st)
 583 {
 584         ATM_INTRO("sense");
 585
 586         /*
 587          * Just return the max sdu size for the connection
 588          */
 589         st->st_blksize = so->so_snd.ssb_hiwat;
 590
 591         ATM_OUTRO();
 592 }
 593
 594
 595 /*
 596  * Retrieve local socket address
 597  *
 598  * Arguments:
 599  *      so      pointer to socket
 600  *      addr    pointer to pointer to contain protocol address
 601  *
 602  * Returns:
 603  *      0       request processed
 604  *      error   error processing request - reason indicated
 605  *
 606  */
 607 static int
 608 atm_aal5_sockaddr(struct socket *so, struct sockaddr **addr)
 609 {
 610         ATM_INTRO("sockaddr");
 611
 612         err = atm_sock_sockaddr(so, addr);
 613
 614         ATM_OUTRO();
 615 }
 616
 617
 618 /*
 619  * Retrieve peer socket address
 620  *
 621  * Arguments:
 622  *      so      pointer to socket
 623  *      addr    pointer to pointer to contain protocol address
 624  *
 625  * Returns:
 626  *      0       request processed
 627  *      error   error processing request - reason indicated
 628  *
 629  */
 630 static int
 631 atm_aal5_peeraddr(struct socket *so, struct sockaddr **addr)
 632 {
 633         ATM_INTRO("peeraddr");
 634
 635         err = atm_sock_peeraddr(so, addr);
 636
 637         ATM_OUTRO();
 638 }
 639
 640
 641 /*
 642  * Process Incoming Calls
 643  *
 644  * This function will receive control when an incoming call has been matched
 645  * to one of our registered listen parameter blocks.  Assuming the call passes
 646  * acceptance criteria and all required resources are available, we will
 647  * create a new protocol control block and socket association.  We must
 648  * then await notification of the final SVC setup results.  If any
 649  * problems are encountered, we will just tell the connection manager to
 650  * reject the call.
 651  *
 652  * Called from a critical section.
 653  *
 654  * Arguments:
 655  *      tok     owner's matched listening token
 656  *      cop     pointer to incoming call's connection block
 657  *      ap      pointer to incoming call's attributes
 658  *      tokp    pointer to location to store our connection token
 659  *
 660  * Returns:
 661  *      0       call is accepted
 662  *      error   call rejected - reason indicated
 663  *
 664  */
 665 static int
 666 atm_aal5_incoming(void *tok, Atm_connection *cop, Atm_attributes *ap,
 667                   void **tokp)
 668 {
 669         Atm_pcb         *atp0 = tok, *atp;
 670         struct socket   *so;
 671         int             err = 0;
 672
 673         /*
 674          * Allocate a new socket and pcb for this connection.
 675          *
 676          * Note that our attach function will be called via sonewconn
 677          * and it will allocate and setup most of the pcb.
 678          */
 679         atm_sock_stat.as_inconn[atp0->atp_type]++;
 680         so = sonewconn(atp0->atp_socket, 0);
 681
 682         if (so) {
 683                 /*
 684                  * Finish pcb setup and pass pcb back to CM
 685                  */
 686                 atp = sotoatmpcb(so);
 687                 atp->atp_conn = cop;
 688                 atp->atp_attr = *atp0->atp_conn->co_lattr;
 689                 strncpy(atp->atp_name, atp0->atp_name, T_ATM_APP_NAME_LEN);
 690                 *tokp = atp;
 691         } else {
 692                 err = ECONNABORTED;
 693                 atm_sock_stat.as_connfail[atp0->atp_type]++;
 694         }
 695
 696         return (err);
 697 }
 698
 699
 700 /*
 701  * Process Socket VCC Input Data
 702  *
 703  * Arguments:
 704  *      tok     owner's connection token (atm_pcb)
 705  *      m       pointer to input packet buffer chain
 706  *
 707  * Returns:
 708  *      none
 709  *
 710  */
 711 static void
 712 atm_aal5_cpcs_data(void *tok, KBuffer *m)
 713 {
 714         Atm_pcb         *atp = tok;
 715         struct socket   *so;
 716         int             len;
 717
 718         so = atp->atp_socket;
 719
 720         KB_PLENGET(m, len);
 721
 722         /*
 723          * Ensure that the socket is able to receive data and
 724          * that there's room in the socket buffer
 725          */
 726         if (((so->so_state & SS_ISCONNECTED) == 0) ||
 727             (so->so_state & SS_CANTRCVMORE) ||
 728             (len > ssb_space(&so->so_rcv))) {
 729                 atm_sock_stat.as_indrop[atp->atp_type]++;
 730                 KB_FREEALL(m);
 731                 return;
 732         }
 733
 734         /*
 735          * Queue the data and notify the user
 736          */
 737         ssb_appendrecord(&so->so_rcv, m);
 738         sorwakeup(so);
 739
 740         return;
 741 }
 742
 743
 744 /*
 745  * Process getsockopt/setsockopt system calls
 746  *
 747  * Arguments:
 748  *      so      pointer to socket
 749  *      sopt    pointer to socket option info
 750  *
 751  * Returns:
 752  *      0       request processed
 753  *      error   error processing request - reason indicated
 754  *
 755  */
 756 int
 757 atm_aal5_ctloutput(struct socket *so, struct sockopt *sopt)
 758 {
 759         Atm_pcb         *atp;
 760
 761         ATM_INTRO("ctloutput");
 762
 763         /*
 764          * Make sure this is for us
 765          */
 766         if (sopt->sopt_level != T_ATM_SIGNALING) {
 767                 ATM_RETERR(EINVAL);
 768         }
 769         atp = sotoatmpcb(so);
 770         if (atp == NULL) {
 771                 ATM_RETERR(ENOTCONN);
 772         }
 773
 774         switch (sopt->sopt_dir) {
 775
 776         case SOPT_SET:
 777                 /*
 778                  * setsockopt()
 779                  */
 780
 781                 /*
 782                  * Validate socket state
 783                  */
 784                 switch (sopt->sopt_name) {
 785
 786                 case T_ATM_ADD_LEAF:
 787                 case T_ATM_DROP_LEAF:
 788                         if ((so->so_state & SS_ISCONNECTED) == 0) {
 789                                 ATM_RETERR(ENOTCONN);
 790                         }
 791                         break;
 792
 793                 case T_ATM_CAUSE:
 794                 case T_ATM_APP_NAME:
 795                         break;
 796
 797                 default:
 798                         if (so->so_state & SS_ISCONNECTED) {
 799                                 ATM_RETERR(EISCONN);
 800                         }
 801                         break;
 802                 }
 803
 804                 /*
 805                  * Validate and save user-supplied option data
 806                  */
 807                 err = atm_sock_setopt(so, sopt, atp);
 808
 809                 break;
 810
 811         case SOPT_GET:
 812                 /*
 813                  * getsockopt()
 814                  */
 815
 816                 /*
 817                  * Return option data
 818                  */
 819                 err = atm_sock_getopt(so, sopt, atp);
 820
 821                 break;
 822         }
 823
 824 out:
 825         ATM_OUTRO();
 826 }
 827
 828
 829 /*
 830  * Initialize AAL5 Sockets
 831  *
 832  * Arguments:
 833  *      none
 834  *
 835  * Returns:
 836  *      none
 837  *
 838  */
 839 void
 840 atm_aal5_init(void)
 841 {
 842         /*
 843          * Register our endpoint
 844          */
 845         if (atm_endpoint_register(&atm_aal5_endpt))
 846                 panic("atm_aal5_init: register");
 847
 848         /*
 849          * Set default connection attributes
 850          */
 851         atm_aal5_defattr.aal.v.aal5.forward_max_SDU_size = T_ATM_ABSENT;
 852         atm_aal5_defattr.aal.v.aal5.backward_max_SDU_size = T_ATM_ABSENT;
 853         atm_aal5_defattr.aal.v.aal5.SSCS_type = T_ATM_NULL;
 854 }
 855
 856
 857 /*
 858  * Get Connection's Application/Owner Name
 859  *
 860  * Arguments:
 861  *      tok     owner's connection token (atm_pcb)
 862  *
 863  * Returns:
 864  *      addr    pointer to string containing our name
 865  *
 866  */
 867 static caddr_t
 868 atm_aal5_getname(void *tok)
 869 {
 870         Atm_pcb         *atp = tok;
 871
 872         return (atp->atp_name);
 873 }
 874