bsd/netat/adsp.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Change log:
  32  *   06/29/95 - Modified to handle flow control for writing (Tuyen Nguyen)
  33  *    Modified for MP, 1996 by Tuyen Nguyen
  34  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  35  */
  36 #define RESOLVE_DBG
  37 #include <sys/errno.h>
  38 #include <sys/types.h>
  39 #include <sys/param.h>
  40 #include <machine/spl.h>
  41 #include <sys/systm.h>
  42 #include <sys/kernel.h>
  43 #include <sys/proc.h>
  44 #include <sys/filedesc.h>
  45 #include <sys/fcntl.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/socket.h>
  48
  49 #include <netat/sysglue.h>
  50 #include <netat/appletalk.h>
  51 #include <netat/at_pcb.h>
  52 #include <netat/ddp.h>
  53 #include <netat/adsp.h>
  54 #include <netat/adsp_internal.h>
  55
  56 #ifdef notdefn
  57 struct adsp_debug adsp_dtable[1025];
  58 int ad_entry = 0;
  59 #endif
  60
  61
  62 adspAllocateCCB(gref)
  63     register gref_t *gref;      /* READ queue */
  64 {
  65     gbuf_t *ccb_mp;
  66     register CCBPtr sp;
  67
  68     if (!(ccb_mp = gbuf_alloc(sizeof(CCB), PRI_LO))) {
  69         return (0);
  70     }
  71     bzero((caddr_t) gbuf_rptr(ccb_mp), sizeof(CCB));
  72     gbuf_wset(ccb_mp,sizeof(CCB));
  73     gref->info = (caddr_t) ccb_mp;
  74     sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
  75
  76     sp->pid = gref->pid; /* save the caller process pointer */
  77     sp->gref = gref;            /* save a back pointer to the WRITE queue */
  78     sp->sp_mp = ccb_mp;         /* and its message block */
  79     return 1;
  80 }
  81
  82 adspRelease(gref)
  83     register gref_t *gref;      /* READ queue */
  84 {
  85     register CCBPtr sp;
  86
  87     if (gref->info) {
  88         sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
  89                                 /* Tells completion routine of close */
  90                                 /* packet to remove us. */
  91
  92         if (sp->state == sPassive || sp->state == sClosed ||
  93             sp->state == sOpening || sp->state == sListening) {
  94             if (sp->state == sListening)
  95                 CompleteQueue(&sp->opb, errAborted);
  96             sp->removing = 1;   /* Prevent allowing another dspClose. */
  97             DoClose(sp, errAborted, 0); /* will remove CCB */
  98             return 0;
  99         } else {                        /* sClosing & sOpen */
 100             sp->state = sClosing;
 101         }
 102
 103         if (CheckOkToClose(sp)) { /* going to close */
 104             sp->sendCtl = B_CTL_CLOSE; /* Send close advice */
 105         } else {
 106                 CheckSend(sp);  /* try one more time to send out data */
 107                 if (sp->state != sClosed)
 108                     sp->sendCtl = B_CTL_CLOSE; /* Setup to send close advice */
 109         }
 110         CheckSend(sp);          /* and force out the close */
 111             sp->removing = 1;   /* Prevent allowing another dspClose. */
 112             sp->state = sClosed;
 113             DoClose(sp, errAborted, 0);  /* to closed and remove CCB */
 114     }
 115 }
 116
 117
 118
 119
 120 adspWriteHandler(gref, mp)
 121     gref_t *gref;                       /* WRITE queue */
 122     gbuf_t *mp;
 123 {
 124
 125     register ioc_t *iocbp;
 126     register struct adspcmd *ap;
 127     int error, flag;
 128         void *sp;
 129
 130     switch(gbuf_type(mp)) {
 131                 case MSG_DATA:
 132                 if (gref->info == 0) {
 133                         gbuf_freem(mp);
 134                         return(STR_IGNORE);
 135                         }
 136                 /*
 137                  * Fill in the global stuff
 138                  */
 139                 ap = (struct adspcmd *)gbuf_rptr(mp);
 140                 ap->gref = gref;
 141                 ap->ioc = 0;
 142                 ap->mp = mp;
 143                 sp = (void *)gbuf_rptr(((gbuf_t *)gref->info));
 144                 switch(ap->csCode) {
 145                         case dspWrite:
 146                                 if ((error = adspWrite(sp, ap)))
 147                                 gbuf_freem(mp);
 148                                 return(STR_IGNORE);
 149                         case dspAttention:
 150                                 if ((error = adspAttention(sp, ap)))
 151                                 gbuf_freem(mp);
 152                                 return(STR_IGNORE);
 153                 }
 154                 case MSG_IOCTL:
 155                 if (gref->info == 0) {
 156                         adspioc_ack(EPROTOTYPE, mp, gref);
 157                         return(STR_IGNORE);
 158                         }
 159                 iocbp = (ioc_t *) gbuf_rptr(mp);
 160                 if (ADSP_IOCTL(iocbp->ioc_cmd)) {
 161                         iocbp->ioc_count = sizeof(*ap) - 1;
 162                         if (gbuf_cont(mp) == 0) {
 163                         adspioc_ack(EINVAL, mp, gref);
 164                         return(STR_IGNORE);
 165                         }
 166                         ap = (struct adspcmd *) gbuf_rptr(gbuf_cont(mp));
 167                         ap->gref = gref;
 168                         ap->ioc = (caddr_t) mp;
 169                         ap->mp = gbuf_cont(mp); /* request head */
 170                         ap->ioResult = 0;
 171
 172                         if ((gref->info == 0) && ((iocbp->ioc_cmd != ADSPOPEN) &&
 173                                                         (iocbp->ioc_cmd != ADSPCLLISTEN))) {
 174                                 ap->ioResult = errState;
 175
 176                         adspioc_ack(EINVAL, mp, gref);
 177                         return(STR_IGNORE);
 178                         }
 179                 } else
 180                         return(STR_PUTNEXT);    /* pass it on down */
 181                 sp = (void *)gbuf_rptr(((gbuf_t *)gref->info));
 182                 switch(iocbp->ioc_cmd) {
 183                         case ADSPOPEN:
 184                         case ADSPCLLISTEN:
 185                                 ap->socket = ((CCBPtr)sp)->localSocket;
 186                                 flag = (adspMode(ap) == ocAccept) ? 1 : 0;
 187                                 if (flag && ap->socket) {
 188                                         if (adspDeassignSocket((CCBPtr)sp) >= 0)
 189                                                 ap->socket = 0;
 190                                 }
 191                                 if ((ap->socket == 0) &&
 192                                         ((ap->socket =
 193                                           (at_socket)adspAssignSocket(gref, flag)) == 0)) {
 194                                         adspioc_ack(EADDRNOTAVAIL, mp, gref);
 195                                         return(STR_IGNORE);
 196                                 }
 197                                 ap->csCode = iocbp->ioc_cmd == ADSPOPEN ? dspInit : dspCLInit;
 198                                 if ((error = adspInit(sp, ap)) == 0) {
 199                                 switch(ap->csCode) {
 200                                 case dspInit:
 201                                         /* and open the connection */
 202                                         ap->csCode = dspOpen;
 203                                         error = adspOpen(sp, ap);
 204                                         break;
 205                                 case dspCLInit:
 206                                         /* ADSPCLLISTEN */
 207                                         ap->csCode = dspCLListen;
 208                                         error = adspCLListen(sp, ap);
 209                                         break;
 210                                 }
 211                                 }
 212                                 if (error)
 213                                 adspioc_ack(error, mp, gref); /* if this failed req complete */
 214                                 return(STR_IGNORE);
 215                         case ADSPCLOSE:
 216                                 ap->csCode = dspClose;
 217                                 if ((error = adspClose(sp, ap))) {
 218                                 adspioc_ack(error, mp, gref);
 219                                 break;
 220                                 }
 221                                 break;
 222                         case ADSPCLREMOVE:
 223                                 ap->csCode = dspCLRemove;
 224                                 error = adspClose(sp, ap);
 225                                 adspioc_ack(error, mp, gref);
 226                                 return(STR_IGNORE);
 227                         case ADSPCLDENY:
 228                                 ap->csCode = dspCLDeny;
 229                                 if ((error = adspCLDeny(sp, ap))) {
 230                                 adspioc_ack(error, mp, gref);
 231                                 }
 232                                 return(STR_IGNORE);
 233                         case ADSPSTATUS:
 234                                 ap->csCode = dspStatus;
 235                                 if ((error = adspStatus(sp, ap))) {
 236                                 adspioc_ack(error, mp, gref);
 237                                 }
 238                                 return(STR_IGNORE);
 239                         case ADSPREAD:
 240                                 ap->csCode = dspRead;
 241                                 if ((error = adspRead(sp, ap))) {
 242                                 adspioc_ack(error, mp, gref);
 243                                 }
 244                                 return(STR_IGNORE);
 245                         case ADSPATTENTION:
 246                                 ap->csCode = dspAttention;
 247                                 if ((error = adspReadAttention(sp, ap))) {
 248                                 adspioc_ack(error, mp, gref);
 249                                 }
 250                                 return(STR_IGNORE);
 251                         case ADSPOPTIONS:
 252                                 ap->csCode = dspOptions;
 253                                 if ((error = adspOptions(sp, ap))) {
 254                                 adspioc_ack(error, mp, gref);
 255                                 }
 256                                 return(STR_IGNORE);
 257                         case ADSPRESET:
 258                                 ap->csCode = dspReset;
 259                                 if ((error = adspReset(sp, ap))) {
 260                                 adspioc_ack(error, mp, gref);
 261                                 }
 262                                 return(STR_IGNORE);
 263                         case ADSPNEWCID:
 264                                 ap->csCode = dspNewCID;
 265                                 if ((error = adspNewCID(sp, ap))) {
 266                                 adspioc_ack(error, mp, gref);
 267                                 }
 268                                 return(STR_IGNORE);
 269                         default:
 270                                 return(STR_PUTNEXT);    /* pass it on down */
 271                 }
 272                 return(STR_IGNORE);
 273                 case MSG_PROTO:
 274                 default:
 275                 gbuf_freem(mp);
 276     }
 277 }
 278
 279
 280 adspReadHandler(gref, mp)
 281     gref_t *gref;
 282     gbuf_t *mp;
 283 {
 284     int error;
 285
 286     switch(gbuf_type(mp)) {
 287     case MSG_DATA:
 288         if ((error = adspPacket(gref, mp))) {
 289             gbuf_freem(mp);
 290         }
 291         break;
 292
 293     case MSG_IOCTL:
 294     default:
 295         return(STR_PUTNEXT);
 296         break;
 297     }
 298     return(STR_IGNORE);
 299 }
 300
 301 /*
 302  * adsp_sendddp()
 303  *
 304  * Description:
 305  *      This procedure a formats a DDP datagram header and calls the
 306  *      DDP module to queue it for routing and transmission according to
 307  *      the DDP parameters.  We always take control of the datagram;
 308  *      if there is an error we free it, otherwise we pass it to the next
 309  *      layer.  We don't need to set the src address fileds because the
 310  *      DDP layer fills these in for us.
 311  *
 312  * Calling Sequence:
 313  *      ret_status = adsp_sendddp(q, sp, mp, length, dstnetaddr, ddptype);
 314  *
 315  * Formal Parameters:
 316  *      sp              Caller stream pointer
 317  *      mp              gbuf_t chain containing the datagram to transmit
 318  *                      The first mblk contains the ADSP header and space
 319  *                      for the DDP header.
 320  *      length          size of data portion of datagram
 321  *      dstnetaddr      address of 4-byte destination internet address
 322  *      ddptype         DDP protocol to assign to the datagram
 323  *
 324  * Completion Status:
 325  *      0               Procedure successful completed.
 326  *      EMSGSIZE        Specified datagram length is too big.
 327  *
 328  * Side Effects:
 329  *      NONE
 330  */
 331
 332 adsp_sendddp(sp, mp, length, dstnetaddr, ddptype)
 333    CCBPtr sp;
 334    gbuf_t *mp;
 335    int length;
 336    AddrUnion *dstnetaddr;
 337    int ddptype;
 338 {
 339    DDPX_FRAME   *ddp;
 340    gbuf_t *mlist = mp;
 341
 342    if (mp == 0)
 343        return EINVAL;
 344
 345    if (length > DDP_DATA_SIZE) {
 346        gbuf_freel(mlist);
 347        return EMSGSIZE;
 348    }
 349
 350   while (mp) {
 351
 352    if (length == 0)
 353        length = gbuf_msgsize(mp) - DDPL_FRAME_LEN;
 354    /* Set up the DDP header */
 355
 356    ddp = (DDPX_FRAME *) gbuf_rptr(mp);
 357    UAS_ASSIGN_HTON(ddp->ddpx_length, (length + DDPL_FRAME_LEN));
 358    UAS_ASSIGN(ddp->ddpx_cksm, 0);
 359    if (sp) {
 360         if (sp->useCheckSum)
 361            UAS_ASSIGN_HTON(ddp->ddpx_cksm, 1);
 362    }
 363
 364    NET_ASSIGN(ddp->ddpx_dnet, dstnetaddr->a.net);
 365    ddp->ddpx_dnode = dstnetaddr->a.node;
 366    ddp->ddpx_source = sp ? sp->localSocket : ddp->ddpx_dest;
 367    ddp->ddpx_dest = dstnetaddr->a.socket;
 368
 369    ddp->ddpx_type = ddptype;
 370    length = 0;
 371    mp = gbuf_next(mp);
 372
 373   }
 374
 375    DDP_OUTPUT(mlist);
 376    return 0;
 377 }
 378
 379 void NotifyUser(sp)
 380     register CCBPtr sp;
 381
 382 {
 383 /*
 384     pidsig(sp->pid, SIGIO);
 385 */
 386 }
 387
 388 void UrgentUser(sp)
 389     register CCBPtr sp;
 390 {
 391 /*
 392     pidsig(sp->pid, SIGURG);
 393 */
 394 }