bsd/netat/adsp.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Change log:
  24  *   06/29/95 - Modified to handle flow control for writing (Tuyen Nguyen)
  25  *    Modified for MP, 1996 by Tuyen Nguyen
  26  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  27  */
  28 #define RESOLVE_DBG
  29 #include <sys/errno.h>
  30 #include <sys/types.h>
  31 #include <sys/param.h>
  32 #include <machine/spl.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/proc.h>
  36 #include <sys/filedesc.h>
  37 #include <sys/fcntl.h>
  38 #include <sys/mbuf.h>
  39 #include <sys/socket.h>
  40
  41 #include <netat/sysglue.h>
  42 #include <netat/appletalk.h>
  43 #include <netat/at_pcb.h>
  44 #include <netat/ddp.h>
  45 #include <netat/adsp.h>
  46 #include <netat/adsp_internal.h>
  47
  48 #ifdef notdefn
  49 struct adsp_debug adsp_dtable[1025];
  50 int ad_entry = 0;
  51 #endif
  52
  53 extern atlock_t adspgen_lock;
  54
  55 adspAllocateCCB(gref)
  56     register gref_t *gref;      /* READ queue */
  57 {
  58     gbuf_t *ccb_mp;
  59     register CCBPtr sp;
  60
  61     if (!(ccb_mp = gbuf_alloc(sizeof(CCB), PRI_LO))) {
  62         return (0);
  63     }
  64     bzero((caddr_t) gbuf_rptr(ccb_mp), sizeof(CCB));
  65     gbuf_wset(ccb_mp,sizeof(CCB));
  66     gref->info = (caddr_t) ccb_mp;
  67     sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
  68
  69     sp->pid = gref->pid; /* save the caller process pointer */
  70     sp->gref = gref;            /* save a back pointer to the WRITE queue */
  71     sp->sp_mp = ccb_mp;         /* and its message block */
  72     ATLOCKINIT(sp->lock);
  73     ATLOCKINIT(sp->lockClose);
  74     ATLOCKINIT(sp->lockRemove);
  75     return 1;
  76 }
  77
  78 adspRelease(gref)
  79     register gref_t *gref;      /* READ queue */
  80 {
  81     register CCBPtr sp;
  82     int s, l;
  83
  84     ATDISABLE(l, adspgen_lock);
  85     if (gref->info) {
  86         sp = (CCBPtr)gbuf_rptr(((gbuf_t *)gref->info));
  87         ATDISABLE(s, sp->lock);
  88         ATENABLE(s, adspgen_lock);
  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             ATENABLE(l, sp->lock);
  95             if (sp->state == sListening)
  96                 CompleteQueue(&sp->opb, errAborted);
  97             sp->removing = 1;   /* Prevent allowing another dspClose. */
  98             DoClose(sp, errAborted, 0); /* will remove CCB */
  99             return 0;
 100         } else {                        /* sClosing & sOpen */
 101             sp->state = sClosing;
 102         }
 103         ATENABLE(l, sp->lock);
 104
 105         if (CheckOkToClose(sp)) { /* going to close */
 106             sp->sendCtl = B_CTL_CLOSE; /* Send close advice */
 107         } else {
 108                 CheckSend(sp);  /* try one more time to send out data */
 109                 if (sp->state != sClosed)
 110                     sp->sendCtl = B_CTL_CLOSE; /* Setup to send close advice */
 111         }
 112         CheckSend(sp);          /* and force out the close */
 113         ATDISABLE(s, sp->lock);
 114             sp->removing = 1;   /* Prevent allowing another dspClose. */
 115             sp->state = sClosed;
 116         ATENABLE(s, sp->lock);
 117             DoClose(sp, errAborted, 0);  /* to closed and remove CCB */
 118     } else
 119         ATENABLE(l, adspgen_lock);
 120 }
 121
 122
 123
 124
 125 adspWriteHandler(gref, mp)
 126     gref_t *gref;                       /* WRITE queue */
 127     gbuf_t *mp;
 128 {
 129
 130     register ioc_t *iocbp;
 131     register struct adspcmd *ap;
 132     int error, flag;
 133         void *sp;
 134
 135     switch(gbuf_type(mp)) {
 136     case MSG_DATA:
 137         if (gref->info == 0) {
 138             gbuf_freem(mp);
 139             return(STR_IGNORE);
 140         }
 141         /*
 142          * Fill in the global stuff
 143          */
 144         ap = (struct adspcmd *)gbuf_rptr(mp);
 145         ap->gref = gref;
 146         ap->ioc = 0;
 147         ap->mp = mp;
 148         sp = (void *)gbuf_rptr(((gbuf_t *)gref->info));
 149         switch(ap->csCode) {
 150         case dspWrite:
 151             if ((error = adspWrite(sp, ap)))
 152                 gbuf_freem(mp);
 153             return(STR_IGNORE);
 154         case dspAttention:
 155             if ((error = adspAttention(sp, ap)))
 156                 gbuf_freem(mp);
 157             return(STR_IGNORE);
 158         }
 159     case MSG_IOCTL:
 160         if (gref->info == 0) {
 161             adspioc_ack(EPROTO, mp, gref);
 162             return(STR_IGNORE);
 163         }
 164         iocbp = (ioc_t *) gbuf_rptr(mp);
 165         if (ADSP_IOCTL(iocbp->ioc_cmd)) {
 166             iocbp->ioc_count = sizeof(*ap) - 1;
 167             if (gbuf_cont(mp) == 0) {
 168                 adspioc_ack(EINVAL, mp, gref);
 169                 return(STR_IGNORE);
 170             }
 171             ap = (struct adspcmd *) gbuf_rptr(gbuf_cont(mp));
 172             ap->gref = gref;
 173             ap->ioc = (caddr_t) mp;
 174             ap->mp = gbuf_cont(mp); /* request head */
 175             ap->ioResult = 0;
 176
 177             if ((gref->info == 0) && ((iocbp->ioc_cmd != ADSPOPEN) &&
 178                                     (iocbp->ioc_cmd != ADSPCLLISTEN))) {
 179                 ap->ioResult = errState;
 180
 181                 adspioc_ack(EINVAL, mp, gref);
 182                 return(STR_IGNORE);
 183             }
 184         }
 185         sp = (void *)gbuf_rptr(((gbuf_t *)gref->info));
 186         switch(iocbp->ioc_cmd) {
 187         case ADSPOPEN:
 188         case ADSPCLLISTEN:
 189                 ap->socket = ((CCBPtr)sp)->localSocket;
 190                 flag = (adspMode(ap) == ocAccept) ? 1 : 0;
 191                 if (flag && ap->socket) {
 192                         if (adspDeassignSocket((CCBPtr)sp) >= 0)
 193                                 ap->socket = 0;
 194                 }
 195                 if ((ap->socket == 0) &&
 196                     ((ap->socket =
 197                       (at_socket)adspAssignSocket(gref, flag)) == 0)) {
 198                     adspioc_ack(EADDRNOTAVAIL, mp, gref);
 199                 return(STR_IGNORE);
 200                 }
 201             ap->csCode = iocbp->ioc_cmd == ADSPOPEN ? dspInit : dspCLInit;
 202             if ((error = adspInit(sp, ap)) == 0) {
 203                 switch(ap->csCode) {
 204                 case dspInit:
 205                     /* and open the connection */
 206                     ap->csCode = dspOpen;
 207                     error = adspOpen(sp, ap);
 208                     break;
 209                 case dspCLInit:
 210                     /* ADSPCLLISTEN */
 211                     ap->csCode = dspCLListen;
 212                     error = adspCLListen(sp, ap);
 213                     break;
 214                 }
 215             }
 216             if (error)
 217                 adspioc_ack(error, mp, gref); /* if this failed req complete */
 218             return(STR_IGNORE);
 219         case ADSPCLOSE:
 220             ap->csCode = dspClose;
 221             if ((error = adspClose(sp, ap))) {
 222                 adspioc_ack(error, mp, gref);
 223                 break;
 224             }
 225             break;
 226         case ADSPCLREMOVE:
 227             ap->csCode = dspCLRemove;
 228             error = adspClose(sp, ap);
 229             adspioc_ack(error, mp, gref);
 230             return(STR_IGNORE);
 231         case ADSPCLDENY:
 232             ap->csCode = dspCLDeny;
 233             if ((error = adspCLDeny(sp, ap))) {
 234                 adspioc_ack(error, mp, gref);
 235             }
 236             return(STR_IGNORE);
 237         case ADSPSTATUS:
 238             ap->csCode = dspStatus;
 239             if ((error = adspStatus(sp, ap))) {
 240                 adspioc_ack(error, mp, gref);
 241             }
 242             return(STR_IGNORE);
 243         case ADSPREAD:
 244             ap->csCode = dspRead;
 245             if ((error = adspRead(sp, ap))) {
 246                 adspioc_ack(error, mp, gref);
 247             }
 248             return(STR_IGNORE);
 249         case ADSPATTENTION:
 250             ap->csCode = dspAttention;
 251             if ((error = adspReadAttention(sp, ap))) {
 252                 adspioc_ack(error, mp, gref);
 253             }
 254             return(STR_IGNORE);
 255         case ADSPOPTIONS:
 256             ap->csCode = dspOptions;
 257             if ((error = adspOptions(sp, ap))) {
 258                 adspioc_ack(error, mp, gref);
 259             }
 260             return(STR_IGNORE);
 261         case ADSPRESET:
 262             ap->csCode = dspReset;
 263             if ((error = adspReset(sp, ap))) {
 264                 adspioc_ack(error, mp, gref);
 265             }
 266             return(STR_IGNORE);
 267         case ADSPNEWCID:
 268             ap->csCode = dspNewCID;
 269             if ((error = adspNewCID(sp, ap))) {
 270                 adspioc_ack(error, mp, gref);
 271             }
 272             return(STR_IGNORE);
 273         default:
 274             return(STR_PUTNEXT);        /* pass it on down */
 275         }
 276         return(STR_IGNORE);
 277     case MSG_PROTO:
 278     default:
 279         gbuf_freem(mp);
 280     }
 281 }
 282
 283
 284 adspReadHandler(gref, mp)
 285     gref_t *gref;
 286     gbuf_t *mp;
 287 {
 288     int error;
 289
 290     switch(gbuf_type(mp)) {
 291     case MSG_DATA:
 292         if ((error = adspPacket(gref, mp))) {
 293             gbuf_freem(mp);
 294         }
 295         break;
 296
 297     case MSG_IOCTL:
 298     default:
 299         return(STR_PUTNEXT);
 300         break;
 301     }
 302     return(STR_IGNORE);
 303 }
 304
 305 /*
 306  * adsp_sendddp()
 307  *
 308  * Description:
 309  *      This procedure a formats a DDP datagram header and calls the
 310  *      DDP module to queue it for routing and transmission according to
 311  *      the DDP parameters.  We always take control of the datagram;
 312  *      if there is an error we free it, otherwise we pass it to the next
 313  *      layer.  We don't need to set the src address fileds because the
 314  *      DDP layer fills these in for us.
 315  *
 316  * Calling Sequence:
 317  *      ret_status = adsp_sendddp(q, sp, mp, length, dstnetaddr, ddptype);
 318  *
 319  * Formal Parameters:
 320  *      sp              Caller stream pointer
 321  *      mp              gbuf_t chain containing the datagram to transmit
 322  *                      The first mblk contains the ADSP header and space
 323  *                      for the DDP header.
 324  *      length          size of data portion of datagram
 325  *      dstnetaddr      address of 4-byte destination internet address
 326  *      ddptype         DDP protocol to assign to the datagram
 327  *
 328  * Completion Status:
 329  *      0               Procedure successful completed.
 330  *      EMSGSIZE        Specified datagram length is too big.
 331  *
 332  * Side Effects:
 333  *      NONE
 334  */
 335
 336 adsp_sendddp(sp, mp, length, dstnetaddr, ddptype)
 337    CCBPtr sp;
 338    gbuf_t *mp;
 339    int length;
 340    AddrUnion *dstnetaddr;
 341    int ddptype;
 342 {
 343    DDPX_FRAME   *ddp;
 344    gbuf_t *mlist = mp;
 345
 346    if (mp == 0)
 347        return EINVAL;
 348
 349    if (length > DDP_DATA_SIZE) {
 350        gbuf_freel(mlist);
 351        return EMSGSIZE;
 352    }
 353
 354   while (mp) {
 355
 356    if (length == 0)
 357        length = gbuf_msgsize(mp) - DDPL_FRAME_LEN;
 358    /* Set up the DDP header */
 359
 360    ddp = (DDPX_FRAME *) gbuf_rptr(mp);
 361    UAS_ASSIGN(ddp->ddpx_length, (length + DDPL_FRAME_LEN));
 362    UAS_ASSIGN(ddp->ddpx_cksm, 0);
 363    if (sp) {
 364         if (sp->useCheckSum)
 365            UAS_ASSIGN(ddp->ddpx_cksm, 1);
 366    }
 367
 368    NET_ASSIGN(ddp->ddpx_dnet, dstnetaddr->a.net);
 369    ddp->ddpx_dnode = dstnetaddr->a.node;
 370    ddp->ddpx_source = sp ? sp->localSocket : ddp->ddpx_dest;
 371    ddp->ddpx_dest = dstnetaddr->a.socket;
 372
 373    ddp->ddpx_type = ddptype;
 374    length = 0;
 375    mp = gbuf_next(mp);
 376
 377   }
 378
 379    DDP_OUTPUT(mlist);
 380    return 0;
 381 }
 382
 383 void NotifyUser(sp)
 384     register CCBPtr sp;
 385
 386 {
 387 /*
 388     pidsig(sp->pid, SIGIO);
 389 */
 390 }
 391
 392 void UrgentUser(sp)
 393     register CCBPtr sp;
 394 {
 395 /*
 396     pidsig(sp->pid, SIGURG);
 397 */
 398 }