service_runtime/nacl_desc_imc_bound_desc.c

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NaCl Service Runtime.  I/O Descriptor / Handle abstraction.
  34  * Bound IMC descriptors.
  35  */
  36
  37 #include <stdlib.h>
  38
  39 #include <errno.h>
  40
  41 #if NACL_WINDOWS
  42 # include "native_client/include/portability.h"
  43 #endif
  44
  45 #include "native_client/service_runtime/nacl_desc_imc_bound_desc.h"
  46
  47 #include "native_client/service_runtime/nacl_config.h"
  48 #include "native_client/service_runtime/nacl_desc_base.h"
  49 #include "native_client/service_runtime/nacl_desc_imc.h"
  50 #include "native_client/service_runtime/nacl_log.h"
  51
  52 #include "native_client/service_runtime/include/sys/errno.h"
  53
  54 #include "native_client/intermodule_comm/nacl_imc_c.h"
  55
  56 int NaClDescImcBoundDescCtor(struct NaClDescImcBoundDesc  *self,
  57                              NaClHandle                   h)
  58 {
  59   struct NaClDesc *basep = (struct NaClDesc *) self;
  60
  61   basep->vtbl = (struct NaClDescVtbl *) NULL;
  62   if (!NaClDescCtor(basep)) {
  63     return 0;
  64   }
  65   self->h = h;
  66   basep->vtbl = &kNaClDescImcBoundDescVtbl;
  67   return 1;
  68 }
  69
  70 void NaClDescImcBoundDescDtor(struct NaClDesc *vself)
  71 {
  72   struct NaClDescImcBoundDesc *self = (struct NaClDescImcBoundDesc *) vself;
  73
  74   NaClClose(self->h);
  75   self->h = NACL_INVALID_HANDLE;
  76   vself->vtbl = (struct NaClDescVtbl *) NULL;
  77   NaClDescDtor(vself);
  78   return;
  79 }
  80
  81 int NaClDescImcBoundDescClose(struct NaClDesc         *vself,
  82                               struct NaClDescEffector *effp)
  83 {
  84   NaClDescUnref(vself);
  85   return 0;
  86 }
  87
  88 int NaClDescImcBoundDescExternalizeSize(struct NaClDesc *vself,
  89                                         size_t          *nbytes,
  90                                         size_t          *nhandles)
  91 {
  92   *nbytes = 0;
  93   *nhandles = 1;
  94
  95   return 0;
  96 }
  97
  98 int NaClDescImcBoundDescExternalize(struct NaClDesc           *vself,
  99                                     struct NaClDescXferState  *xfer)
 100 {
 101   struct NaClDescImcBoundDesc *self;
 102
 103   self = (struct NaClDescImcBoundDesc *) vself;
 104   *xfer->next_handle++ = self->h;
 105
 106   return 0;
 107 }
 108
 109 int NaClDescImcBoundDescAcceptConn(struct NaClDesc          *vself,
 110                                    struct NaClDescEffector  *effp)
 111 {
 112   /*
 113    * See NaClDescConnCapConnectAddr code in nacl_desc_conn_cap.c
 114    */
 115   struct NaClDescImcBoundDesc *self;
 116   int                         retval;
 117   NaClHandle                  nh;
 118   int                         nbytes;
 119   struct NaClMessageHeader    conn_msg;
 120   struct NaClDescImcDesc      *peer;
 121
 122   self = (struct NaClDescImcBoundDesc *) vself;
 123
 124   if (NULL == (peer = malloc(sizeof *peer))) {
 125     return -NACL_ABI_ENOMEM;
 126   }
 127
 128   conn_msg.iov = 0;
 129   conn_msg.iov_length = 0;
 130   conn_msg.handle_count = 1;
 131   conn_msg.handles = &nh;
 132   conn_msg.flags = 0;
 133   nh = NACL_INVALID_HANDLE;
 134
 135   NaClLog(3,
 136           ("NaClDescImcBoundDescAcceptConn(0x%08"PRIxPTR", 0x%08"PRIxPTR"):"
 137            " h = %d\n"),
 138           (uintptr_t) vself,
 139           (uintptr_t) effp,
 140           self->h);
 141
 142   if (-1 == (nbytes = NaClReceiveDatagram(self->h, &conn_msg, 0))) {
 143     NaClLog(LOG_ERROR,
 144             ("NaClDescImcBoundDescAcceptConn:"
 145              " could not receive connection message, errno %d\n"),
 146             errno);
 147     retval = -NACL_ABI_EMFILE;
 148     goto cleanup;
 149   }
 150   if (0 != nbytes) {
 151     NaClLog(LOG_ERROR, ("NaClDescImcBoundDescAcceptConn:"
 152                         " connection message contains data?!?\n"));
 153     retval = -NACL_ABI_EMFILE;  /* TODO: better errno? */
 154     goto cleanup;
 155   }
 156   if (1 != conn_msg.handle_count) {
 157     NaClLog(LOG_ERROR, ("NaClDescImcBoundDescAcceptConn: connection"
 158                         " message contains %"PRIdS" descriptors?!?\n"),
 159             conn_msg.handle_count);
 160     retval = -NACL_ABI_EMFILE;  /* TODO: better errno? */
 161     goto cleanup;
 162   }
 163   if (!NaClDescImcDescCtor(peer, nh)) {
 164     retval = -NACL_ABI_EMFILE;
 165     goto cleanup;
 166   }
 167   nh = NACL_INVALID_HANDLE;
 168
 169   retval = (*effp->vtbl->ReturnCreatedDesc)(effp, (struct NaClDesc *) peer);
 170
 171   if (retval < 0) {
 172     (*peer->base.vtbl->Dtor)((struct NaClDesc *) peer);
 173   }
 174
 175 cleanup:
 176   if (retval < 0) {
 177     if (NACL_INVALID_HANDLE != nh) {
 178       (void) NaClClose(nh);
 179       nh = NACL_INVALID_HANDLE;
 180     }
 181     free(peer);
 182   }
 183   return retval;
 184 }
 185
 186 struct NaClDescVtbl const kNaClDescImcBoundDescVtbl = {
 187   NaClDescImcBoundDescDtor,
 188   NaClDescMapNotImplemented,
 189   NaClDescUnmapUnsafeNotImplemented,
 190   NaClDescUnmapNotImplemented,
 191   NaClDescReadNotImplemented,
 192   NaClDescWriteNotImplemented,
 193   NaClDescSeekNotImplemented,
 194   NaClDescIoctlNotImplemented,
 195   NaClDescFstatNotImplemented,
 196   NaClDescImcBoundDescClose,
 197   NaClDescGetdentsNotImplemented,
 198   NACL_DESC_BOUND_SOCKET,
 199   NaClDescImcBoundDescExternalizeSize,
 200   NaClDescImcBoundDescExternalize,
 201   NaClDescLockNotImplemented,
 202   NaClDescTryLockNotImplemented,
 203   NaClDescUnlockNotImplemented,
 204   NaClDescWaitNotImplemented,
 205   NaClDescTimedWaitAbsNotImplemented,
 206   NaClDescSignalNotImplemented,
 207   NaClDescBroadcastNotImplemented,
 208   NaClDescSendMsgNotImplemented,
 209   NaClDescRecvMsgNotImplemented,
 210   NaClDescConnectAddrNotImplemented,
 211   NaClDescImcBoundDescAcceptConn,
 212   NaClDescPostNotImplemented,
 213   NaClDescSemWaitNotImplemented,
 214   NaClDescGetValueNotImplemented,
 215 };
 216
 217 int NaClDescImcBoundDescInternalize(struct NaClDesc           **baseptr,
 218                                     struct NaClDescXferState  *xfer)
 219 {
 220   int                         rv;
 221   struct NaClDescImcBoundDesc *ndibdp;
 222
 223   rv = -NACL_ABI_EIO;
 224   ndibdp = NULL;
 225
 226   if (xfer->next_handle == xfer->handle_buffer_end) {
 227     rv = -NACL_ABI_EIO;
 228     goto cleanup;
 229   }
 230   ndibdp = malloc(sizeof *ndibdp);
 231   if (NULL == ndibdp) {
 232     goto cleanup;
 233   }
 234   NaClDescImcBoundDescCtor(ndibdp, *xfer->next_handle);
 235   *xfer->next_handle++ = NACL_INVALID_HANDLE;
 236   *baseptr = (struct NaClDesc *) ndibdp;
 237   rv = 0;
 238
 239 cleanup:
 240   if (rv < 0) {
 241     free(ndibdp);
 242   }
 243   return rv;
 244 }