The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netatm/atm_aal5.c

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    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 1.16 2002/05/31 11:52:31 tanimura Exp $
   27  *
   28  */
   29 
   30 /*
   31  * Core ATM Services
   32  * -----------------
   33  *
   34  * ATM AAL5 socket protocol processing
   35  *
   36  */
   37 
   38 #include <sys/param.h>
   39 #include <sys/lock.h>
   40 #include <sys/protosw.h>
   41 #include <sys/signalvar.h>
   42 #include <sys/socket.h>
   43 #include <sys/socketvar.h>
   44 #include <sys/stat.h>
   45 #include <sys/sx.h>
   46 #include <sys/systm.h>
   47 #include <net/if.h>
   48 #include <netatm/port.h>
   49 #include <netatm/queue.h>
   50 #include <netatm/atm.h>
   51 #include <netatm/atm_sys.h>
   52 #include <netatm/atm_sap.h>
   53 #include <netatm/atm_cm.h>
   54 #include <netatm/atm_if.h>
   55 #include <netatm/atm_stack.h>
   56 #include <netatm/atm_pcb.h>
   57 #include <netatm/atm_var.h>
   58 
   59 #ifndef lint
   60 __RCSID("@(#) $FreeBSD: src/sys/netatm/atm_aal5.c,v 1.16 2002/05/31 11:52:31 tanimura Exp $");
   61 #endif
   62 
   63 
   64 /*
   65  * Global variables
   66  */
   67 u_long          atm_aal5_sendspace = 64 * 1024; /* XXX */
   68 u_long          atm_aal5_recvspace = 64 * 1024; /* XXX */
   69 
   70 
   71 /*
   72  * Local functions
   73  */
   74 static int      atm_aal5_attach(struct socket *, int, struct thread *td);
   75 static int      atm_aal5_detach(struct socket *);
   76 static int      atm_aal5_bind(struct socket *, struct sockaddr *, 
   77                         struct thread *td);
   78 static int      atm_aal5_listen(struct socket *, struct thread *td);
   79 static int      atm_aal5_connect(struct socket *, struct sockaddr *,
   80                         struct thread *td);
   81 static int      atm_aal5_accept(struct socket *, struct sockaddr **);
   82 static int      atm_aal5_disconnect(struct socket *);
   83 static int      atm_aal5_shutdown(struct socket *);
   84 static int      atm_aal5_send(struct socket *, int, KBuffer *,
   85                         struct sockaddr *, KBuffer *, struct thread *td);
   86 static int      atm_aal5_abort(struct socket *);
   87 static int      atm_aal5_control(struct socket *, u_long, caddr_t, 
   88                         struct ifnet *, struct thread *td);
   89 static int      atm_aal5_sense(struct socket *, struct stat *);
   90 static int      atm_aal5_sockaddr(struct socket *, struct sockaddr **);
   91 static int      atm_aal5_peeraddr(struct socket *, struct sockaddr **);
   92 static int      atm_aal5_incoming(void *, Atm_connection *,
   93                         Atm_attributes *, void **);
   94 static void     atm_aal5_cpcs_data(void *, KBuffer *);
   95 static caddr_t  atm_aal5_getname(void *);
   96 
   97 
   98 /*
   99  * New-style socket request routines
  100  */
  101 struct pr_usrreqs       atm_aal5_usrreqs = {
  102         atm_aal5_abort,                 /* pru_abort */
  103         atm_aal5_accept,                /* pru_accept */
  104         atm_aal5_attach,                /* pru_attach */
  105         atm_aal5_bind,                  /* pru_bind */
  106         atm_aal5_connect,               /* pru_connect */
  107         pru_connect2_notsupp,           /* pru_connect2 */
  108         atm_aal5_control,               /* pru_control */
  109         atm_aal5_detach,                /* pru_detach */
  110         atm_aal5_disconnect,            /* pru_disconnect */
  111         atm_aal5_listen,                /* pru_listen */
  112         atm_aal5_peeraddr,              /* pru_peeraddr */
  113         pru_rcvd_notsupp,               /* pru_rcvd */
  114         pru_rcvoob_notsupp,             /* pru_rcvoob */
  115         atm_aal5_send,                  /* pru_send */
  116         atm_aal5_sense,                 /* pru_sense */
  117         atm_aal5_shutdown,              /* pru_shutdown */
  118         atm_aal5_sockaddr,              /* pru_sockaddr */
  119         sosend,                         /* pru_sosend */
  120         soreceive,                      /* pru_soreceive */
  121         sopoll                          /* pru_sopoll */
  122 };
  123 
  124 /*
  125  * Local variables
  126  */
  127 static Atm_endpoint     atm_aal5_endpt = {
  128         NULL,
  129         ENDPT_SOCK_AAL5,
  130         NULL,
  131         atm_aal5_getname,
  132         atm_sock_connected,
  133         atm_sock_cleared,
  134         atm_aal5_incoming,
  135         NULL,
  136         NULL,
  137         NULL,
  138         atm_aal5_cpcs_data,
  139         NULL,
  140         NULL,
  141         NULL,
  142         NULL
  143 };
  144 
  145 static Atm_attributes   atm_aal5_defattr = {
  146         NULL,                   /* nif */
  147         CMAPI_CPCS,             /* api */
  148         0,                      /* api_init */
  149         0,                      /* headin */
  150         0,                      /* headout */
  151         {                       /* aal */
  152                 T_ATM_PRESENT,
  153                 ATM_AAL5
  154         },
  155         {                       /* traffic */
  156                 T_ATM_ABSENT,
  157         },
  158         {                       /* bearer */
  159                 T_ATM_ABSENT,
  160         },
  161         {                       /* bhli */
  162                 T_ATM_ABSENT
  163         },
  164         {                       /* blli */
  165                 T_ATM_ABSENT,
  166                 T_ATM_ABSENT,
  167         },
  168         {                       /* llc */
  169                 T_ATM_ABSENT,
  170         },
  171         {                       /* called */
  172                 T_ATM_ABSENT,
  173                 {
  174                         T_ATM_ABSENT,
  175                         0
  176                 },
  177                 {
  178                         T_ATM_ABSENT,
  179                         0
  180                 }
  181         },
  182         {                       /* calling */
  183                 T_ATM_ABSENT
  184         },
  185         {                       /* qos */
  186                 T_ATM_ABSENT,
  187         },
  188         {                       /* transit */
  189                 T_ATM_ABSENT
  190         },
  191         {                       /* cause */
  192                 T_ATM_ABSENT
  193         }
  194 };
  195 
  196 
  197 /*
  198  * Handy common code macros
  199  */
  200 #ifdef DIAGNOSTIC
  201 #define ATM_INTRO(f)                                            \
  202         int             s, err = 0;                             \
  203         s = splnet();                                           \
  204         ATM_DEBUG2("aal5 socket %s (%p)\n", f, so);             \
  205         /*                                                      \
  206          * Stack queue should have been drained                 \
  207          */                                                     \
  208         if (atm_stackq_head != NULL)                            \
  209                 panic("atm_aal5: stack queue not empty");       \
  210         ;
  211 #else /* !DIAGNOSTIC */
  212 #define ATM_INTRO(f)                                            \
  213         int             s, err = 0;                             \
  214         s = splnet();                                           \
  215         ;
  216 #endif /* DIAGNOSTIC */
  217 
  218 #define ATM_OUTRO()                                             \
  219         /*                                                      \
  220          * Drain any deferred calls                             \
  221          */                                                     \
  222         STACK_DRAIN();                                          \
  223         (void) splx(s);                                         \
  224         return (err);                                           \
  225         ;
  226 
  227 #define ATM_RETERR(errno) {                                     \
  228         err = errno;                                            \
  229         goto out;                                               \
  230 }
  231 
  232 
  233 /*
  234  * Attach protocol to socket
  235  *
  236  * Arguments:
  237  *      so      pointer to socket
  238  *      proto   protocol identifier
  239  *      p       pointer to process
  240  *
  241  * Returns:
  242  *      0       request processed
  243  *      errno   error processing request - reason indicated
  244  *
  245  */
  246 static int
  247 atm_aal5_attach(so, proto, td)
  248         struct socket   *so;
  249         int             proto;
  250         struct thread   *td;
  251 {
  252         Atm_pcb         *atp;
  253 
  254         ATM_INTRO("attach");
  255 
  256         /*
  257          * Do general attach stuff
  258          */
  259         err = atm_sock_attach(so, atm_aal5_sendspace, atm_aal5_recvspace);
  260         if (err)
  261                 ATM_RETERR(err);
  262 
  263         /*
  264          * Finish up any protocol specific stuff
  265          */
  266         atp = sotoatmpcb(so);
  267         atp->atp_type = ATPT_AAL5;
  268 
  269         /*
  270          * Set default connection attributes
  271          */
  272         atp->atp_attr = atm_aal5_defattr;
  273         strncpy(atp->atp_name, "(AAL5)", T_ATM_APP_NAME_LEN);
  274 
  275 out:
  276         ATM_OUTRO();
  277 }
  278 
  279 
  280 /*
  281  * Detach protocol from socket
  282  *
  283  * Arguments:
  284  *      so      pointer to socket
  285  *
  286  * Returns:
  287  *      0       request processed
  288  *      errno   error processing request - reason indicated
  289  *
  290  */
  291 static int
  292 atm_aal5_detach(so)
  293         struct socket   *so;
  294 {
  295         ATM_INTRO("detach");
  296 
  297         err = atm_sock_detach(so);
  298 
  299         ATM_OUTRO();
  300 }
  301 
  302 
  303 /*
  304  * Bind address to socket
  305  *
  306  * Arguments:
  307  *      so      pointer to socket
  308  *      addr    pointer to protocol address
  309  *      p       pointer to process
  310  *
  311  * Returns:
  312  *      0       request processed
  313  *      errno   error processing request - reason indicated
  314  *
  315  */
  316 static int
  317 atm_aal5_bind(so, addr, td)
  318         struct socket   *so;
  319         struct sockaddr *addr;
  320         struct thread   *td;
  321 {
  322         ATM_INTRO("bind");
  323 
  324         err = atm_sock_bind(so, addr);
  325 
  326         ATM_OUTRO();
  327 }
  328 
  329 
  330 /*
  331  * Listen for incoming connections
  332  *
  333  * Arguments:
  334  *      so      pointer to socket
  335  *      p       pointer to process
  336  *
  337  * Returns:
  338  *      0       request processed
  339  *      errno   error processing request - reason indicated
  340  *
  341  */
  342 static int
  343 atm_aal5_listen(so, td)
  344         struct socket   *so;
  345         struct thread   *td;
  346 {
  347         ATM_INTRO("listen");
  348 
  349         err = atm_sock_listen(so, &atm_aal5_endpt);
  350 
  351         ATM_OUTRO();
  352 }
  353 
  354 
  355 /*
  356  * Connect socket to peer
  357  *
  358  * Arguments:
  359  *      so      pointer to socket
  360  *      addr    pointer to protocol address
  361  *      p       pointer to process
  362  *
  363  * Returns:
  364  *      0       request processed
  365  *      errno   error processing request - reason indicated
  366  *
  367  */
  368 static int
  369 atm_aal5_connect(so, addr, td)
  370         struct socket   *so;
  371         struct sockaddr *addr;
  372         struct thread   *td;
  373 {
  374         Atm_pcb         *atp;
  375 
  376         ATM_INTRO("connect");
  377 
  378         atp = sotoatmpcb(so);
  379 
  380         /*
  381          * Resize send socket buffer to maximum sdu size
  382          */
  383         if (atp->atp_attr.aal.tag == T_ATM_PRESENT) {
  384                 long    size;
  385 
  386                 size = atp->atp_attr.aal.v.aal5.forward_max_SDU_size;
  387                 if (size != T_ATM_ABSENT)
  388                         if (!sbreserve(&so->so_snd, size, so, td)) {
  389                                 err = ENOBUFS;
  390                                 ATM_OUTRO();
  391                         }
  392                                 
  393         }
  394 
  395         /*
  396          * Now get the socket connected
  397          */
  398         err = atm_sock_connect(so, addr, &atm_aal5_endpt);
  399 
  400         ATM_OUTRO();
  401 }
  402 
  403 
  404 /*
  405  * Accept pending connection
  406  *
  407  * Arguments:
  408  *      so      pointer to socket
  409  *      addr    pointer to pointer to contain protocol address
  410  *
  411  * Returns:
  412  *      0       request processed
  413  *      errno   error processing request - reason indicated
  414  *
  415  */
  416 static int
  417 atm_aal5_accept(so, addr)
  418         struct socket   *so;
  419         struct sockaddr **addr;
  420 {
  421         ATM_INTRO("accept");
  422 
  423         /*
  424          * Everything is pretty much done already, we just need to
  425          * return the caller's address to the user.
  426          */
  427         err = atm_sock_peeraddr(so, addr);
  428 
  429         ATM_OUTRO();
  430 }
  431 
  432 
  433 /*
  434  * Disconnect connected socket
  435  *
  436  * Arguments:
  437  *      so      pointer to socket
  438  *
  439  * Returns:
  440  *      0       request processed
  441  *      errno   error processing request - reason indicated
  442  *
  443  */
  444 static int
  445 atm_aal5_disconnect(so)
  446         struct socket   *so;
  447 {
  448         ATM_INTRO("disconnect");
  449 
  450         err = atm_sock_disconnect(so);
  451 
  452         ATM_OUTRO();
  453 }
  454 
  455 
  456 /*
  457  * Shut down socket data transmission
  458  *
  459  * Arguments:
  460  *      so      pointer to socket
  461  *
  462  * Returns:
  463  *      0       request processed
  464  *      errno   error processing request - reason indicated
  465  *
  466  */
  467 static int
  468 atm_aal5_shutdown(so)
  469         struct socket   *so;
  470 {
  471         ATM_INTRO("shutdown");
  472 
  473         socantsendmore(so);
  474 
  475         ATM_OUTRO();
  476 }
  477 
  478 
  479 /*
  480  * Send user data
  481  *
  482  * Arguments:
  483  *      so      pointer to socket
  484  *      flags   send data flags
  485  *      m       pointer to buffer containing user data
  486  *      addr    pointer to protocol address
  487  *      control pointer to buffer containing protocol control data
  488  *      p       pointer to process
  489  *
  490  * Returns:
  491  *      0       request processed
  492  *      errno   error processing request - reason indicated
  493  *
  494  */
  495 static int
  496 atm_aal5_send(so, flags, m, addr, control, td)
  497         struct socket   *so;
  498         int             flags;
  499         KBuffer         *m;
  500         struct sockaddr *addr;
  501         KBuffer         *control;
  502         struct thread   *td;
  503 {
  504         Atm_pcb         *atp;
  505 
  506         ATM_INTRO("send");
  507 
  508         /*
  509          * We don't support any control functions
  510          */
  511         if (control) {
  512                 int     clen;
  513 
  514                 clen = KB_LEN(control);
  515                 KB_FREEALL(control);
  516                 if (clen) {
  517                         KB_FREEALL(m);
  518                         ATM_RETERR(EINVAL);
  519                 }
  520         }
  521 
  522         /*
  523          * We also don't support any flags or send-level addressing
  524          */
  525         if (flags || addr) {
  526                 KB_FREEALL(m);
  527                 ATM_RETERR(EINVAL);
  528         }
  529 
  530         /*
  531          * All we've got left is the data, so push it out
  532          */
  533         atp = sotoatmpcb(so);
  534         err = atm_cm_cpcs_data(atp->atp_conn, m);
  535         if (err) {
  536                 /*
  537                  * Output problem, drop packet
  538                  */
  539                 atm_sock_stat.as_outdrop[atp->atp_type]++;
  540                 KB_FREEALL(m);
  541         }
  542 
  543 out:
  544         ATM_OUTRO();
  545 }
  546 
  547 
  548 /*
  549  * Abnormally terminate service
  550  *
  551  * Arguments:
  552  *      so      pointer to socket
  553  *
  554  * Returns:
  555  *      0       request processed
  556  *      errno   error processing request - reason indicated
  557  *
  558  */
  559 static int
  560 atm_aal5_abort(so)
  561         struct socket   *so;
  562 {
  563         ATM_INTRO("abort");
  564 
  565         so->so_error = ECONNABORTED;
  566         err = atm_sock_detach(so);
  567 
  568         ATM_OUTRO();
  569 }
  570 
  571 
  572 /*
  573  * Do control operation - ioctl system call
  574  *
  575  * Arguments:
  576  *      so      pointer to socket
  577  *      cmd     ioctl code
  578  *      data    pointer to code specific parameter data area
  579  *      ifp     pointer to ifnet structure if it's an interface ioctl
  580  *      p       pointer to process
  581  *
  582  * Returns:
  583  *      0       request processed
  584  *      errno   error processing request - reason indicated
  585  *
  586  */
  587 static int
  588 atm_aal5_control(so, cmd, data, ifp, td)
  589         struct socket   *so;
  590         u_long          cmd;
  591         caddr_t         data;
  592         struct ifnet    *ifp;
  593         struct thread   *td;
  594 {
  595         ATM_INTRO("control");
  596 
  597         switch (cmd) {
  598 
  599         default:
  600                 err = EOPNOTSUPP;
  601         }
  602 
  603         ATM_OUTRO();
  604 }
  605 
  606 /*
  607  * Sense socket status - fstat system call
  608  *
  609  * Arguments:
  610  *      so      pointer to socket
  611  *      st      pointer to file status structure
  612  *
  613  * Returns:
  614  *      0       request processed
  615  *      errno   error processing request - reason indicated
  616  *
  617  */
  618 static int
  619 atm_aal5_sense(so, st)
  620         struct socket   *so;
  621         struct stat     *st;
  622 {
  623         ATM_INTRO("sense");
  624 
  625         /*
  626          * Just return the max sdu size for the connection
  627          */
  628         st->st_blksize = so->so_snd.sb_hiwat;
  629 
  630         ATM_OUTRO();
  631 }
  632 
  633 
  634 /*
  635  * Retrieve local socket address
  636  *
  637  * Arguments:
  638  *      so      pointer to socket
  639  *      addr    pointer to pointer to contain protocol address
  640  *
  641  * Returns:
  642  *      0       request processed
  643  *      errno   error processing request - reason indicated
  644  *
  645  */
  646 static int
  647 atm_aal5_sockaddr(so, addr)
  648         struct socket   *so;
  649         struct sockaddr **addr;
  650 {
  651         ATM_INTRO("sockaddr");
  652 
  653         err = atm_sock_sockaddr(so, addr);
  654 
  655         ATM_OUTRO();
  656 }
  657 
  658 
  659 /*
  660  * Retrieve peer socket address
  661  *
  662  * Arguments:
  663  *      so      pointer to socket
  664  *      addr    pointer to pointer to contain protocol address
  665  *
  666  * Returns:
  667  *      0       request processed
  668  *      errno   error processing request - reason indicated
  669  *
  670  */
  671 static int
  672 atm_aal5_peeraddr(so, addr)
  673         struct socket   *so;
  674         struct sockaddr **addr;
  675 {
  676         ATM_INTRO("peeraddr");
  677 
  678         err = atm_sock_peeraddr(so, addr);
  679 
  680         ATM_OUTRO();
  681 }
  682 
  683 
  684 /*
  685  * Process Incoming Calls
  686  *
  687  * This function will receive control when an incoming call has been matched
  688  * to one of our registered listen parameter blocks.  Assuming the call passes
  689  * acceptance criteria and all required resources are available, we will
  690  * create a new protocol control block and socket association.  We must
  691  * then await notification of the final SVC setup results.  If any
  692  * problems are encountered, we will just tell the connection manager to
  693  * reject the call.
  694  *
  695  * Called at splnet.
  696  *
  697  * Arguments:
  698  *      tok     owner's matched listening token
  699  *      cop     pointer to incoming call's connection block
  700  *      ap      pointer to incoming call's attributes
  701  *      tokp    pointer to location to store our connection token
  702  *
  703  * Returns:
  704  *      0       call is accepted
  705  *      errno   call rejected - reason indicated
  706  *
  707  */
  708 static int
  709 atm_aal5_incoming(tok, cop, ap, tokp)
  710         void            *tok;
  711         Atm_connection  *cop;
  712         Atm_attributes  *ap;
  713         void            **tokp;
  714 {
  715         Atm_pcb         *atp0 = tok, *atp;
  716         struct socket   *so;
  717         int             err = 0;
  718 
  719         /*
  720          * Allocate a new socket and pcb for this connection.
  721          *
  722          * Note that our attach function will be called via sonewconn
  723          * and it will allocate and setup most of the pcb.
  724          */
  725         atm_sock_stat.as_inconn[atp0->atp_type]++;
  726         so = sonewconn(atp0->atp_socket, 0);
  727 
  728         if (so) {
  729                 /*
  730                  * Finish pcb setup and pass pcb back to CM
  731                  */
  732                 atp = sotoatmpcb(so);
  733                 atp->atp_conn = cop;
  734                 atp->atp_attr = *atp0->atp_conn->co_lattr;
  735                 strncpy(atp->atp_name, atp0->atp_name, T_ATM_APP_NAME_LEN);
  736                 *tokp = atp;
  737         } else {
  738                 err = ECONNABORTED;
  739                 atm_sock_stat.as_connfail[atp0->atp_type]++;
  740         }
  741 
  742         return (err);
  743 }
  744 
  745 
  746 /*
  747  * Process Socket VCC Input Data
  748  *
  749  * Arguments:
  750  *      tok     owner's connection token (atm_pcb)
  751  *      m       pointer to input packet buffer chain
  752  *
  753  * Returns:
  754  *      none
  755  *
  756  */
  757 static void
  758 atm_aal5_cpcs_data(tok, m)
  759         void            *tok;
  760         KBuffer         *m;
  761 {
  762         Atm_pcb         *atp = tok;
  763         struct socket   *so;
  764         int             len;
  765 
  766         so = atp->atp_socket;
  767 
  768         KB_PLENGET(m, len);
  769 
  770         /*
  771          * Ensure that the socket is able to receive data and
  772          * that there's room in the socket buffer
  773          */
  774         if (((so->so_state & SS_ISCONNECTED) == 0) ||
  775             (so->so_state & SS_CANTRCVMORE) ||
  776             (len > sbspace(&so->so_rcv))) {
  777                 atm_sock_stat.as_indrop[atp->atp_type]++;
  778                 KB_FREEALL(m);
  779                 return;
  780         }
  781 
  782         /*
  783          * Queue the data and notify the user
  784          */
  785         sbappendrecord(&so->so_rcv, m);
  786         sorwakeup(so);
  787 
  788         return;
  789 }
  790 
  791 
  792 /*
  793  * Process getsockopt/setsockopt system calls
  794  *
  795  * Arguments:
  796  *      so      pointer to socket
  797  *      sopt    pointer to socket option info
  798  *
  799  * Returns:
  800  *      0       request processed
  801  *      errno   error processing request - reason indicated
  802  *
  803  */
  804 int
  805 atm_aal5_ctloutput(so, sopt)
  806         struct socket   *so;
  807         struct sockopt  *sopt;
  808 {
  809         Atm_pcb         *atp;
  810 
  811         ATM_INTRO("ctloutput");
  812 
  813         /*
  814          * Make sure this is for us
  815          */
  816         if (sopt->sopt_level != T_ATM_SIGNALING) {
  817                 ATM_RETERR(EINVAL);
  818         }
  819         atp = sotoatmpcb(so);
  820         if (atp == NULL) {
  821                 ATM_RETERR(ENOTCONN);
  822         }
  823 
  824         switch (sopt->sopt_dir) {
  825 
  826         case SOPT_SET:
  827                 /*
  828                  * setsockopt()
  829                  */
  830 
  831                 /*
  832                  * Validate socket state
  833                  */
  834                 switch (sopt->sopt_name) {
  835 
  836                 case T_ATM_ADD_LEAF:
  837                 case T_ATM_DROP_LEAF:
  838                         if ((so->so_state & SS_ISCONNECTED) == 0) {
  839                                 ATM_RETERR(ENOTCONN);
  840                         }
  841                         break;
  842 
  843                 case T_ATM_CAUSE:
  844                 case T_ATM_APP_NAME:
  845                         break;
  846 
  847                 default:
  848                         if (so->so_state & SS_ISCONNECTED) {
  849                                 ATM_RETERR(EISCONN);
  850                         }
  851                         break;
  852                 }
  853 
  854                 /*
  855                  * Validate and save user-supplied option data
  856                  */
  857                 err = atm_sock_setopt(so, sopt, atp);
  858 
  859                 break;
  860 
  861         case SOPT_GET:
  862                 /*
  863                  * getsockopt()
  864                  */
  865 
  866                 /*
  867                  * Return option data
  868                  */
  869                 err = atm_sock_getopt(so, sopt, atp);
  870 
  871                 break;
  872         }
  873 
  874 out:
  875         ATM_OUTRO();
  876 }
  877 
  878 
  879 /*
  880  * Initialize AAL5 Sockets
  881  *
  882  * Arguments:
  883  *      none
  884  *
  885  * Returns:
  886  *      none
  887  *
  888  */
  889 void
  890 atm_aal5_init()
  891 {
  892         /*
  893          * Register our endpoint
  894          */
  895         if (atm_endpoint_register(&atm_aal5_endpt))
  896                 panic("atm_aal5_init: register");
  897 
  898         /*
  899          * Set default connection attributes
  900          */
  901         atm_aal5_defattr.aal.v.aal5.forward_max_SDU_size = T_ATM_ABSENT;
  902         atm_aal5_defattr.aal.v.aal5.backward_max_SDU_size = T_ATM_ABSENT;
  903         atm_aal5_defattr.aal.v.aal5.SSCS_type = T_ATM_NULL;
  904 }
  905 
  906 
  907 /*
  908  * Get Connection's Application/Owner Name
  909  *
  910  * Arguments:
  911  *      tok     owner's connection token (atm_pcb)
  912  *
  913  * Returns:
  914  *      addr    pointer to string containing our name
  915  *
  916  */
  917 static caddr_t
  918 atm_aal5_getname(tok)
  919         void            *tok;
  920 {
  921         Atm_pcb         *atp = tok;
  922 
  923         return (atp->atp_name);
  924 }
  925 

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