service_runtime/nacl_desc_imc.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  */
  35
  36 #include <stdlib.h>
  37
  38 #include "native_client/include/portability.h"
  39
  40 #include "native_client/service_runtime/nacl_desc_imc.h"
  41
  42 #include "native_client/service_runtime/nacl_config.h"
  43 #include "native_client/service_runtime/nacl_log.h"
  44 #include "native_client/service_runtime/nacl_desc_base.h"
  45 #include "native_client/service_runtime/nacl_sync_checked.h"
  46 #include "native_client/service_runtime/internal_errno.h"
  47 #include "native_client/service_runtime/sel_util.h"
  48 #include "native_client/service_runtime/sel_mem.h"
  49 #include "native_client/service_runtime/sel_ldr.h"
  50 #include "native_client/service_runtime/nacl_app_thread.h"
  51 #include "native_client/service_runtime/nacl_desc_base.h"
  52
  53 #include "native_client/service_runtime/include/sys/errno.h"
  54
  55 #if NACL_WINDOWS
  56 # include "native_client/service_runtime/win/xlate_system_error.h"
  57 #endif
  58
  59 /*
  60  * This file contains the implementation of the NaClDescImcDesc
  61  * subclass of NaClDesc.
  62  *
  63  * NaClDescImcDesc is the subclass that wraps IMC socket descriptors.
  64  */
  65
  66 int NaClDescImcDescCtor(struct NaClDescImcDesc  *self,
  67                         NaClHandle              h)
  68 {
  69   struct NaClDesc *basep = (struct NaClDesc *) self;
  70
  71   basep->vtbl = (struct NaClDescVtbl *) NULL;
  72   if (!NaClDescCtor(basep)) {
  73     return 0;
  74   }
  75   self->h = h;
  76   basep->vtbl = &kNaClDescImcDescVtbl;
  77   return 1;
  78 }
  79
  80 void NaClDescImcDescDtor(struct NaClDesc *vself)
  81 {
  82   struct NaClDescImcDesc  *self = (struct NaClDescImcDesc *) vself;
  83
  84   NaClClose(self->h);
  85   self->h = NACL_INVALID_HANDLE;
  86   vself->vtbl = (struct NaClDescVtbl *) NULL;
  87   NaClDescDtor(vself);
  88 }
  89
  90 int NaClDescImcDescClose(struct NaClDesc          *vself,
  91                          struct NaClDescEffector  *effp)
  92 {
  93   NaClDescUnref(vself);
  94   return 0;
  95 }
  96
  97 int NaClDescImcDescExternalizeSize(struct NaClDesc  *vself,
  98                                    size_t           *nbytes,
  99                                    size_t           *nhandles)
 100 {
 101   *nbytes = 0;
 102   *nhandles = 1;
 103
 104   return 0;
 105 }
 106
 107 int NaClDescImcDescExternalize(struct NaClDesc          *vself,
 108                                struct NaClDescXferState *xfer)
 109 {
 110   struct NaClDescImcDesc  *self = (struct NaClDescImcDesc *) vself;
 111
 112   *xfer->next_handle++ = self->h;
 113   return 0;
 114 }
 115
 116 /* we could expose sendmsg to descriptors, but only on unix-like OSes */
 117 int NaClDescImcDescSendMsg(struct NaClDesc          *vself,
 118                            struct NaClDescEffector  *effp,
 119                            struct NaClMessageHeader *dgram,
 120                            int                      flags)
 121 {
 122   struct NaClDescImcDesc *self = (struct NaClDescImcDesc *) vself;
 123
 124   int result = NaClSendDatagram(self->h, dgram, flags);
 125   if (-1 == result) {
 126 #if NACL_WINDOWS
 127     return -NaClXlateSystemError(GetLastError());
 128 #elif NACL_LINUX || NACL_OSX
 129     return -errno;
 130 #else
 131 # error "Unknown target platform: cannot translate error code(s) from SendMsg"
 132 #endif
 133   }
 134   return result;
 135 }
 136
 137 int NaClDescImcDescRecvMsg(struct NaClDesc          *vself,
 138                            struct NaClDescEffector  *effp,
 139                            struct NaClMessageHeader *dgram,
 140                            int                      flags)
 141 {
 142   struct NaClDescImcDesc  *self = (struct NaClDescImcDesc *) vself;
 143
 144   int result = NaClReceiveDatagram(self->h, dgram, flags);
 145   if (-1 == result) {
 146 #if NACL_WINDOWS
 147     return -NaClXlateSystemError(GetLastError());
 148 #elif NACL_LINUX || NACL_OSX
 149     return -errno;
 150 #else
 151 # error "Unknown target platform: cannot translate error code(s) from RecvMsg"
 152 #endif
 153   }
 154   return result;
 155 }
 156
 157 struct NaClDescVtbl const kNaClDescImcDescVtbl = {
 158   NaClDescImcDescDtor,
 159   NaClDescMapNotImplemented,
 160   NaClDescUnmapUnsafeNotImplemented,
 161   NaClDescUnmapNotImplemented,
 162   NaClDescReadNotImplemented,
 163   NaClDescWriteNotImplemented,
 164   NaClDescSeekNotImplemented,
 165   NaClDescIoctlNotImplemented,
 166   NaClDescFstatNotImplemented,
 167   NaClDescImcDescClose,
 168   NaClDescGetdentsNotImplemented,
 169   NACL_DESC_CONNECTED_SOCKET,
 170   NaClDescImcDescExternalizeSize,
 171   NaClDescImcDescExternalize,
 172   NaClDescLockNotImplemented,
 173   NaClDescTryLockNotImplemented,
 174   NaClDescUnlockNotImplemented,
 175   NaClDescWaitNotImplemented,
 176   NaClDescTimedWaitAbsNotImplemented,
 177   NaClDescSignalNotImplemented,
 178   NaClDescBroadcastNotImplemented,
 179   NaClDescImcDescSendMsg,
 180   NaClDescImcDescRecvMsg,
 181   NaClDescConnectAddrNotImplemented,
 182   NaClDescAcceptConnNotImplemented,
 183   NaClDescPostNotImplemented,
 184   NaClDescSemWaitNotImplemented,
 185   NaClDescGetValueNotImplemented,
 186 };
 187
 188 int NaClDescImcDescInternalize(struct NaClDesc          **baseptr,
 189                                struct NaClDescXferState *xfer)
 190 {
 191   int                     rv;
 192   NaClHandle              h;
 193   struct NaClDescImcDesc  *ndidp;
 194
 195   rv = -NACL_ABI_EIO;
 196   h = NACL_INVALID_HANDLE;
 197   ndidp = NULL;
 198
 199   if (xfer->next_handle == xfer->handle_buffer_end) {
 200     rv = -NACL_ABI_EIO;
 201     goto cleanup;
 202   }
 203   ndidp = malloc(sizeof *ndidp);
 204   if (NULL == ndidp) {
 205     rv = -NACL_ABI_ENOMEM;
 206     goto cleanup;
 207   }
 208   NaClDescImcDescCtor(ndidp, *xfer->next_handle);
 209   *xfer->next_handle++ = NACL_INVALID_HANDLE;
 210   *baseptr = (struct NaClDesc *) ndidp;
 211   rv = 0;
 212
 213 cleanup:
 214   if (rv < 0) {
 215     free(ndidp);
 216   }
 217   return rv;
 218 }