protocol/lufa/LUFA-120730/LUFA/Drivers/USB/Class/Host/RNDISClassHost.c

   1 /*\r
   2              LUFA Library\r
   3      Copyright (C) Dean Camera, 2012.\r
   4 \r
   5   dean [at] fourwalledcubicle [dot] com\r
   6            www.lufa-lib.org\r
   7 */\r
   8 \r
   9 /*\r
  10   Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
  11 \r
  12   Permission to use, copy, modify, distribute, and sell this\r
  13   software and its documentation for any purpose is hereby granted\r
  14   without fee, provided that the above copyright notice appear in\r
  15   all copies and that both that the copyright notice and this\r
  16   permission notice and warranty disclaimer appear in supporting\r
  17   documentation, and that the name of the author not be used in\r
  18   advertising or publicity pertaining to distribution of the\r
  19   software without specific, written prior permission.\r
  20 \r
  21   The author disclaim all warranties with regard to this\r
  22   software, including all implied warranties of merchantability\r
  23   and fitness.  In no event shall the author be liable for any\r
  24   special, indirect or consequential damages or any damages\r
  25   whatsoever resulting from loss of use, data or profits, whether\r
  26   in an action of contract, negligence or other tortious action,\r
  27   arising out of or in connection with the use or performance of\r
  28   this software.\r
  29 */\r
  30 \r
  31 #define  __INCLUDE_FROM_USB_DRIVER\r
  32 #include "../../Core/USBMode.h"\r
  33 \r
  34 #if defined(USB_CAN_BE_HOST)\r
  35 \r
  36 #define  __INCLUDE_FROM_RNDIS_DRIVER\r
  37 #define  __INCLUDE_FROM_RNDIS_HOST_C\r
  38 #include "RNDISClassHost.h"\r
  39 \r
  40 uint8_t RNDIS_Host_ConfigurePipes(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,\r
  41                                   uint16_t ConfigDescriptorSize,\r
  42                                   void* ConfigDescriptorData)\r
  43 {\r
  44         USB_Descriptor_Endpoint_t*  DataINEndpoint        = NULL;\r
  45         USB_Descriptor_Endpoint_t*  DataOUTEndpoint       = NULL;\r
  46         USB_Descriptor_Endpoint_t*  NotificationEndpoint  = NULL;\r
  47         USB_Descriptor_Interface_t* RNDISControlInterface = NULL;\r
  48 \r
  49         memset(&RNDISInterfaceInfo->State, 0x00, sizeof(RNDISInterfaceInfo->State));\r
  50 \r
  51         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)\r
  52           return RNDIS_ENUMERROR_InvalidConfigDescriptor;\r
  53 \r
  54         RNDISControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);\r
  55 \r
  56         while (!(DataINEndpoint) || !(DataOUTEndpoint) || !(NotificationEndpoint))\r
  57         {\r
  58                 if (!(RNDISControlInterface) ||\r
  59                     USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
  60                                               DCOMP_RNDIS_Host_NextRNDISInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)\r
  61                 {\r
  62                         if (NotificationEndpoint)\r
  63                         {\r
  64                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
  65                                                                                           DCOMP_RNDIS_Host_NextRNDISDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)\r
  66                                 {\r
  67                                         return RNDIS_ENUMERROR_NoCompatibleInterfaceFound;\r
  68                                 }\r
  69 \r
  70                                 DataINEndpoint  = NULL;\r
  71                                 DataOUTEndpoint = NULL;\r
  72                         }\r
  73                         else\r
  74                         {\r
  75                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
  76                                                                                           DCOMP_RNDIS_Host_NextRNDISControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)\r
  77                                 {\r
  78                                         return RNDIS_ENUMERROR_NoCompatibleInterfaceFound;\r
  79                                 }\r
  80 \r
  81                                 RNDISControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);\r
  82 \r
  83                                 NotificationEndpoint = NULL;\r
  84                         }\r
  85 \r
  86                         continue;\r
  87                 }\r
  88 \r
  89                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);\r
  90 \r
  91                 if ((EndpointData->EndpointAddress & ENDPOINT_DIR_MASK) == ENDPOINT_DIR_IN)\r
  92                 {\r
  93                         if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)\r
  94                           NotificationEndpoint = EndpointData;\r
  95                         else\r
  96                           DataINEndpoint = EndpointData;\r
  97                 }\r
  98                 else\r
  99                 {\r
 100                         DataOUTEndpoint = EndpointData;\r
 101                 }\r
 102         }\r
 103 \r
 104         RNDISInterfaceInfo->Config.DataINPipe.Size  = le16_to_cpu(DataINEndpoint->EndpointSize);\r
 105         RNDISInterfaceInfo->Config.DataINPipe.EndpointAddress = DataINEndpoint->EndpointAddress;\r
 106         RNDISInterfaceInfo->Config.DataINPipe.Type  = EP_TYPE_BULK;\r
 107         \r
 108         RNDISInterfaceInfo->Config.DataOUTPipe.Size = le16_to_cpu(DataOUTEndpoint->EndpointSize);\r
 109         RNDISInterfaceInfo->Config.DataOUTPipe.EndpointAddress = DataOUTEndpoint->EndpointAddress;\r
 110         RNDISInterfaceInfo->Config.DataOUTPipe.Type = EP_TYPE_BULK;\r
 111         \r
 112         RNDISInterfaceInfo->Config.NotificationPipe.Size = le16_to_cpu(NotificationEndpoint->EndpointSize);\r
 113         RNDISInterfaceInfo->Config.NotificationPipe.EndpointAddress = NotificationEndpoint->EndpointAddress;\r
 114         RNDISInterfaceInfo->Config.NotificationPipe.Type = EP_TYPE_INTERRUPT;\r
 115 \r
 116         if (!(Pipe_ConfigurePipeTable(&RNDISInterfaceInfo->Config.DataINPipe, 1)))\r
 117           return false;\r
 118         \r
 119         if (!(Pipe_ConfigurePipeTable(&RNDISInterfaceInfo->Config.DataOUTPipe, 1)))\r
 120           return false;\r
 121 \r
 122         if (!(Pipe_ConfigurePipeTable(&RNDISInterfaceInfo->Config.NotificationPipe, 1)))\r
 123           return false;\r
 124 \r
 125         RNDISInterfaceInfo->State.ControlInterfaceNumber = RNDISControlInterface->InterfaceNumber;\r
 126         RNDISInterfaceInfo->State.IsActive = true;\r
 127 \r
 128         return RNDIS_ENUMERROR_NoError;\r
 129 }\r
 130 \r
 131 static uint8_t DCOMP_RNDIS_Host_NextRNDISControlInterface(void* const CurrentDescriptor)\r
 132 {\r
 133         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);\r
 134 \r
 135         if (Header->Type == DTYPE_Interface)\r
 136         {\r
 137                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);\r
 138 \r
 139                 if ((Interface->Class    == CDC_CSCP_CDCClass)    &&\r
 140                     (Interface->SubClass == CDC_CSCP_ACMSubclass) &&\r
 141                     (Interface->Protocol == CDC_CSCP_VendorSpecificProtocol))\r
 142                 {\r
 143                         return DESCRIPTOR_SEARCH_Found;\r
 144                 }\r
 145         }\r
 146 \r
 147         return DESCRIPTOR_SEARCH_NotFound;\r
 148 }\r
 149 \r
 150 static uint8_t DCOMP_RNDIS_Host_NextRNDISDataInterface(void* const CurrentDescriptor)\r
 151 {\r
 152         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);\r
 153 \r
 154         if (Header->Type == DTYPE_Interface)\r
 155         {\r
 156                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor,\r
 157                                                                          USB_Descriptor_Interface_t);\r
 158 \r
 159                 if ((Interface->Class    == CDC_CSCP_CDCDataClass)   &&\r
 160                     (Interface->SubClass == CDC_CSCP_NoDataSubclass) &&\r
 161                     (Interface->Protocol == CDC_CSCP_NoDataProtocol))\r
 162                 {\r
 163                         return DESCRIPTOR_SEARCH_Found;\r
 164                 }\r
 165         }\r
 166 \r
 167         return DESCRIPTOR_SEARCH_NotFound;\r
 168 }\r
 169 \r
 170 static uint8_t DCOMP_RNDIS_Host_NextRNDISInterfaceEndpoint(void* const CurrentDescriptor)\r
 171 {\r
 172         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);\r
 173 \r
 174         if (Header->Type == DTYPE_Endpoint)\r
 175         {\r
 176                 USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);\r
 177 \r
 178                 uint8_t EndpointType = (Endpoint->Attributes & EP_TYPE_MASK);\r
 179 \r
 180                 if (((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) &&\r
 181                     !(Pipe_IsEndpointBound(Endpoint->EndpointAddress)))\r
 182                 {\r
 183                         return DESCRIPTOR_SEARCH_Found;\r
 184                 }\r
 185         }\r
 186         else if (Header->Type == DTYPE_Interface)\r
 187         {\r
 188                 return DESCRIPTOR_SEARCH_Fail;\r
 189         }\r
 190 \r
 191         return DESCRIPTOR_SEARCH_NotFound;\r
 192 }\r
 193 \r
 194 static uint8_t RNDIS_SendEncapsulatedCommand(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,\r
 195                                              void* Buffer,\r
 196                                              const uint16_t Length)\r
 197 {\r
 198         USB_ControlRequest = (USB_Request_Header_t)\r
 199                 {\r
 200                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),\r
 201                         .bRequest      = RNDIS_REQ_SendEncapsulatedCommand,\r
 202                         .wValue        = 0,\r
 203                         .wIndex        = RNDISInterfaceInfo->State.ControlInterfaceNumber,\r
 204                         .wLength       = Length,\r
 205                 };\r
 206 \r
 207         Pipe_SelectPipe(PIPE_CONTROLPIPE);\r
 208 \r
 209         return USB_Host_SendControlRequest(Buffer);\r
 210 }\r
 211 \r
 212 static uint8_t RNDIS_GetEncapsulatedResponse(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,\r
 213                                              void* Buffer,\r
 214                                              const uint16_t Length)\r
 215 {\r
 216         USB_ControlRequest = (USB_Request_Header_t)\r
 217                 {\r
 218                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),\r
 219                         .bRequest      = RNDIS_REQ_GetEncapsulatedResponse,\r
 220                         .wValue        = 0,\r
 221                         .wIndex        = RNDISInterfaceInfo->State.ControlInterfaceNumber,\r
 222                         .wLength       = Length,\r
 223                 };\r
 224 \r
 225         Pipe_SelectPipe(PIPE_CONTROLPIPE);\r
 226 \r
 227         return USB_Host_SendControlRequest(Buffer);\r
 228 }\r
 229 \r
 230 uint8_t RNDIS_Host_SendKeepAlive(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo)\r
 231 {\r
 232         uint8_t ErrorCode;\r
 233 \r
 234         RNDIS_KeepAlive_Message_t  KeepAliveMessage;\r
 235         RNDIS_KeepAlive_Complete_t KeepAliveMessageResponse;\r
 236 \r
 237         KeepAliveMessage.MessageType     = CPU_TO_LE32(REMOTE_NDIS_KEEPALIVE_MSG);\r
 238         KeepAliveMessage.MessageLength   = CPU_TO_LE32(sizeof(RNDIS_KeepAlive_Message_t));\r
 239         KeepAliveMessage.RequestId       = cpu_to_le32(RNDISInterfaceInfo->State.RequestID++);\r
 240 \r
 241         if ((ErrorCode = RNDIS_SendEncapsulatedCommand(RNDISInterfaceInfo, &KeepAliveMessage,\r
 242                                                        sizeof(RNDIS_KeepAlive_Message_t))) != HOST_SENDCONTROL_Successful)\r
 243         {\r
 244                 return ErrorCode;\r
 245         }\r
 246 \r
 247         if ((ErrorCode = RNDIS_GetEncapsulatedResponse(RNDISInterfaceInfo, &KeepAliveMessageResponse,\r
 248                                                        sizeof(RNDIS_KeepAlive_Complete_t))) != HOST_SENDCONTROL_Successful)\r
 249         {\r
 250                 return ErrorCode;\r
 251         }\r
 252 \r
 253         return HOST_SENDCONTROL_Successful;\r
 254 }\r
 255 \r
 256 uint8_t RNDIS_Host_InitializeDevice(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo)\r
 257 {\r
 258         uint8_t ErrorCode;\r
 259 \r
 260         RNDIS_Initialize_Message_t  InitMessage;\r
 261         RNDIS_Initialize_Complete_t InitMessageResponse;\r
 262 \r
 263         InitMessage.MessageType     = CPU_TO_LE32(REMOTE_NDIS_INITIALIZE_MSG);\r
 264         InitMessage.MessageLength   = CPU_TO_LE32(sizeof(RNDIS_Initialize_Message_t));\r
 265         InitMessage.RequestId       = cpu_to_le32(RNDISInterfaceInfo->State.RequestID++);\r
 266 \r
 267         InitMessage.MajorVersion    = CPU_TO_LE32(REMOTE_NDIS_VERSION_MAJOR);\r
 268         InitMessage.MinorVersion    = CPU_TO_LE32(REMOTE_NDIS_VERSION_MINOR);\r
 269         InitMessage.MaxTransferSize = cpu_to_le32(RNDISInterfaceInfo->Config.HostMaxPacketSize);\r
 270 \r
 271         if ((ErrorCode = RNDIS_SendEncapsulatedCommand(RNDISInterfaceInfo, &InitMessage,\r
 272                                                        sizeof(RNDIS_Initialize_Message_t))) != HOST_SENDCONTROL_Successful)\r
 273         {\r
 274                 return ErrorCode;\r
 275         }\r
 276 \r
 277         if ((ErrorCode = RNDIS_GetEncapsulatedResponse(RNDISInterfaceInfo, &InitMessageResponse,\r
 278                                                        sizeof(RNDIS_Initialize_Complete_t))) != HOST_SENDCONTROL_Successful)\r
 279         {\r
 280                 return ErrorCode;\r
 281         }\r
 282 \r
 283         if (InitMessageResponse.Status != CPU_TO_LE32(REMOTE_NDIS_STATUS_SUCCESS))\r
 284           return RNDIS_ERROR_LOGICAL_CMD_FAILED;\r
 285 \r
 286         RNDISInterfaceInfo->State.DeviceMaxPacketSize = le32_to_cpu(InitMessageResponse.MaxTransferSize);\r
 287 \r
 288         return HOST_SENDCONTROL_Successful;\r
 289 }\r
 290 \r
 291 uint8_t RNDIS_Host_SetRNDISProperty(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,\r
 292                                     const uint32_t Oid,\r
 293                                     void* Buffer,\r
 294                                     const uint16_t Length)\r
 295 {\r
 296         uint8_t ErrorCode;\r
 297 \r
 298         struct\r
 299         {\r
 300                 RNDIS_Set_Message_t SetMessage;\r
 301                 uint8_t             ContiguousBuffer[Length];\r
 302         } SetMessageData;\r
 303 \r
 304         RNDIS_Set_Complete_t SetMessageResponse;\r
 305 \r
 306         SetMessageData.SetMessage.MessageType    = CPU_TO_LE32(REMOTE_NDIS_SET_MSG);\r
 307         SetMessageData.SetMessage.MessageLength  = cpu_to_le32(sizeof(RNDIS_Set_Message_t) + Length);\r
 308         SetMessageData.SetMessage.RequestId      = cpu_to_le32(RNDISInterfaceInfo->State.RequestID++);\r
 309 \r
 310         SetMessageData.SetMessage.Oid            = cpu_to_le32(Oid);\r
 311         SetMessageData.SetMessage.InformationBufferLength = cpu_to_le32(Length);\r
 312         SetMessageData.SetMessage.InformationBufferOffset = CPU_TO_LE32(sizeof(RNDIS_Set_Message_t) - sizeof(RNDIS_Message_Header_t));\r
 313         SetMessageData.SetMessage.DeviceVcHandle = CPU_TO_LE32(0);\r
 314 \r
 315         memcpy(&SetMessageData.ContiguousBuffer, Buffer, Length);\r
 316 \r
 317         if ((ErrorCode = RNDIS_SendEncapsulatedCommand(RNDISInterfaceInfo, &SetMessageData,\r
 318                                                        (sizeof(RNDIS_Set_Message_t) + Length))) != HOST_SENDCONTROL_Successful)\r
 319         {\r
 320                 return ErrorCode;\r
 321         }\r
 322 \r
 323         if ((ErrorCode = RNDIS_GetEncapsulatedResponse(RNDISInterfaceInfo, &SetMessageResponse,\r
 324                                                        sizeof(RNDIS_Set_Complete_t))) != HOST_SENDCONTROL_Successful)\r
 325         {\r
 326                 return ErrorCode;\r
 327         }\r
 328 \r
 329         if (SetMessageResponse.Status != CPU_TO_LE32(REMOTE_NDIS_STATUS_SUCCESS))\r
 330           return RNDIS_ERROR_LOGICAL_CMD_FAILED;\r
 331 \r
 332         return HOST_SENDCONTROL_Successful;\r
 333 }\r
 334 \r
 335 uint8_t RNDIS_Host_QueryRNDISProperty(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,\r
 336                                       const uint32_t Oid,\r
 337                                       void* Buffer,\r
 338                                       const uint16_t MaxLength)\r
 339 {\r
 340         uint8_t ErrorCode;\r
 341 \r
 342         RNDIS_Query_Message_t QueryMessage;\r
 343 \r
 344         struct\r
 345         {\r
 346                 RNDIS_Query_Complete_t QueryMessageResponse;\r
 347                 uint8_t                ContiguousBuffer[MaxLength];\r
 348         } QueryMessageResponseData;\r
 349 \r
 350         QueryMessage.MessageType    = CPU_TO_LE32(REMOTE_NDIS_QUERY_MSG);\r
 351         QueryMessage.MessageLength  = CPU_TO_LE32(sizeof(RNDIS_Query_Message_t));\r
 352         QueryMessage.RequestId      = cpu_to_le32(RNDISInterfaceInfo->State.RequestID++);\r
 353 \r
 354         QueryMessage.Oid            = cpu_to_le32(Oid);\r
 355         QueryMessage.InformationBufferLength = CPU_TO_LE32(0);\r
 356         QueryMessage.InformationBufferOffset = CPU_TO_LE32(0);\r
 357         QueryMessage.DeviceVcHandle = CPU_TO_LE32(0);\r
 358 \r
 359         if ((ErrorCode = RNDIS_SendEncapsulatedCommand(RNDISInterfaceInfo, &QueryMessage,\r
 360                                                        sizeof(RNDIS_Query_Message_t))) != HOST_SENDCONTROL_Successful)\r
 361         {\r
 362                 return ErrorCode;\r
 363         }\r
 364 \r
 365         if ((ErrorCode = RNDIS_GetEncapsulatedResponse(RNDISInterfaceInfo, &QueryMessageResponseData,\r
 366                                                        sizeof(QueryMessageResponseData))) != HOST_SENDCONTROL_Successful)\r
 367         {\r
 368                 return ErrorCode;\r
 369         }\r
 370 \r
 371         if (QueryMessageResponseData.QueryMessageResponse.Status != CPU_TO_LE32(REMOTE_NDIS_STATUS_SUCCESS))\r
 372           return RNDIS_ERROR_LOGICAL_CMD_FAILED;\r
 373 \r
 374         memcpy(Buffer, &QueryMessageResponseData.ContiguousBuffer, MaxLength);\r
 375 \r
 376         return HOST_SENDCONTROL_Successful;\r
 377 }\r
 378 \r
 379 bool RNDIS_Host_IsPacketReceived(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo)\r
 380 {\r
 381         bool PacketWaiting;\r
 382 \r
 383         if ((USB_HostState != HOST_STATE_Configured) || !(RNDISInterfaceInfo->State.IsActive))\r
 384           return false;\r
 385 \r
 386         Pipe_SelectPipe(RNDISInterfaceInfo->Config.DataINPipe.Address);\r
 387 \r
 388         Pipe_Unfreeze();\r
 389         PacketWaiting = Pipe_IsINReceived();\r
 390         Pipe_Freeze();\r
 391 \r
 392         return PacketWaiting;\r
 393 }\r
 394 \r
 395 uint8_t RNDIS_Host_ReadPacket(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,\r
 396                               void* Buffer,\r
 397                               uint16_t* const PacketLength)\r
 398 {\r
 399         uint8_t ErrorCode;\r
 400 \r
 401         if ((USB_HostState != HOST_STATE_Configured) || !(RNDISInterfaceInfo->State.IsActive))\r
 402           return PIPE_READYWAIT_DeviceDisconnected;\r
 403 \r
 404         Pipe_SelectPipe(RNDISInterfaceInfo->Config.DataINPipe.Address);\r
 405         Pipe_Unfreeze();\r
 406 \r
 407         if (!(Pipe_IsReadWriteAllowed()))\r
 408         {\r
 409                 if (Pipe_IsINReceived())\r
 410                   Pipe_ClearIN();\r
 411 \r
 412                 *PacketLength = 0;\r
 413                 Pipe_Freeze();\r
 414                 return PIPE_RWSTREAM_NoError;\r
 415         }\r
 416 \r
 417         RNDIS_Packet_Message_t DeviceMessage;\r
 418 \r
 419         if ((ErrorCode = Pipe_Read_Stream_LE(&DeviceMessage, sizeof(RNDIS_Packet_Message_t),\r
 420                                              NULL)) != PIPE_RWSTREAM_NoError)\r
 421         {\r
 422                 return ErrorCode;\r
 423         }\r
 424 \r
 425         *PacketLength = (uint16_t)le32_to_cpu(DeviceMessage.DataLength);\r
 426 \r
 427         Pipe_Discard_Stream(le32_to_cpu(DeviceMessage.DataOffset) -\r
 428                             (sizeof(RNDIS_Packet_Message_t) - sizeof(RNDIS_Message_Header_t)),\r
 429                             NULL);\r
 430 \r
 431         Pipe_Read_Stream_LE(Buffer, *PacketLength, NULL);\r
 432 \r
 433         if (!(Pipe_BytesInPipe()))\r
 434           Pipe_ClearIN();\r
 435 \r
 436         Pipe_Freeze();\r
 437 \r
 438         return PIPE_RWSTREAM_NoError;\r
 439 }\r
 440 \r
 441 uint8_t RNDIS_Host_SendPacket(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,\r
 442                               void* Buffer,\r
 443                               const uint16_t PacketLength)\r
 444 {\r
 445         uint8_t ErrorCode;\r
 446 \r
 447         if ((USB_HostState != HOST_STATE_Configured) || !(RNDISInterfaceInfo->State.IsActive))\r
 448           return PIPE_READYWAIT_DeviceDisconnected;\r
 449 \r
 450         RNDIS_Packet_Message_t DeviceMessage;\r
 451 \r
 452         memset(&DeviceMessage, 0, sizeof(RNDIS_Packet_Message_t));\r
 453         DeviceMessage.MessageType   = CPU_TO_LE32(REMOTE_NDIS_PACKET_MSG);\r
 454         DeviceMessage.MessageLength = CPU_TO_LE32(sizeof(RNDIS_Packet_Message_t) + PacketLength);\r
 455         DeviceMessage.DataOffset    = CPU_TO_LE32(sizeof(RNDIS_Packet_Message_t) - sizeof(RNDIS_Message_Header_t));\r
 456         DeviceMessage.DataLength    = cpu_to_le32(PacketLength);\r
 457 \r
 458         Pipe_SelectPipe(RNDISInterfaceInfo->Config.DataOUTPipe.Address);\r
 459         Pipe_Unfreeze();\r
 460 \r
 461         if ((ErrorCode = Pipe_Write_Stream_LE(&DeviceMessage, sizeof(RNDIS_Packet_Message_t),\r
 462                                               NULL)) != PIPE_RWSTREAM_NoError)\r
 463         {\r
 464                 return ErrorCode;\r
 465         }\r
 466 \r
 467         Pipe_Write_Stream_LE(Buffer, PacketLength, NULL);\r
 468         Pipe_ClearOUT();\r
 469 \r
 470         Pipe_Freeze();\r
 471 \r
 472         return PIPE_RWSTREAM_NoError;\r
 473 }\r
 474 \r
 475 #endif\r
 476 \r