Demos/Host/LowLevel/RNDISEthernetHost/Lib/RNDISCommands.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  RNDIS Device commands, to issue RNDIS commands to the device for
  34  *  the control and data transfer between the host and RNDIS device.
  35  */
  36
  37 #include "RNDISCommands.h"
  38
  39 /** Current RNDIS Request ID, for associating sent commands with received data */
  40 uint32_t RequestID = 0;
  41
  42
  43 /** Function to send the given encapsulated RNDIS command to the device.
  44  *
  45  *  \param[in] Buffer  Source command data buffer to send to the device
  46  *  \param[in] Length   Number of bytes to send
  47  *
  48  *  \return A value from the USB_Host_SendControlErrorCodes_t enum
  49  */
  50 uint8_t RNDIS_SendEncapsulatedCommand(void* Buffer, uint16_t Length)
  51 {
  52         USB_ControlRequest = (USB_Request_Header_t)
  53                 {
  54                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
  55                         .bRequest      = REQ_SendEncapsulatedCommand,
  56                         .wValue        = 0,
  57                         .wIndex        = 0,
  58                         .wLength       = Length,
  59                 };
  60
  61         /* Select the control pipe for the request transfer */
  62         Pipe_SelectPipe(PIPE_CONTROLPIPE);
  63
  64         return USB_Host_SendControlRequest(Buffer);
  65 }
  66
  67 /** Function to receive the given encapsulated RNDIS response from the device.
  68  *
  69  *  \param[out] Buffer  Destination command data buffer to write read data from the device to
  70  *  \param[in] Length   Number of bytes to read
  71  *
  72  *  \return A value from the USB_Host_SendControlErrorCodes_t enum
  73  */
  74 uint8_t RNDIS_GetEncapsulatedResponse(void* Buffer, uint16_t Length)
  75 {
  76         USB_ControlRequest = (USB_Request_Header_t)
  77                 {
  78                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
  79                         .bRequest      = REQ_GetEncapsulatedResponse,
  80                         .wValue        = 0,
  81                         .wIndex        = 0,
  82                         .wLength       = Length,
  83                 };
  84
  85         /* Select the control pipe for the request transfer */
  86         Pipe_SelectPipe(PIPE_CONTROLPIPE);
  87
  88         return USB_Host_SendControlRequest(Buffer);
  89 }
  90
  91 /** Sends a RNDIS KEEPALIVE command to the device, to ensure that it does not enter standby mode after periods
  92  *  of long inactivity.
  93  *
  94  *  \return A value from the USB_Host_SendControlErrorCodes_t enum or RNDIS_COMMAND_FAILED if the device returned a
  95  *          logical command failure
  96  */
  97 uint8_t RNDIS_SendKeepAlive(void)
  98 {
  99         uint8_t ErrorCode;
 100
 101         RNDIS_KeepAlive_Message_t  KeepAliveMessage;
 102         RNDIS_KeepAlive_Complete_t KeepAliveMessageResponse;
 103
 104         KeepAliveMessage.MessageType     = REMOTE_NDIS_KEEPALIVE_MSG;
 105         KeepAliveMessage.MessageLength   = sizeof(RNDIS_KeepAlive_Message_t);
 106         KeepAliveMessage.RequestId       = RequestID++;
 107
 108         if ((ErrorCode = RNDIS_SendEncapsulatedCommand(&KeepAliveMessage,
 109                                                        sizeof(RNDIS_KeepAlive_Message_t))) != HOST_SENDCONTROL_Successful)
 110         {
 111                 return ErrorCode;
 112         }
 113
 114         if ((ErrorCode = RNDIS_GetEncapsulatedResponse(&KeepAliveMessageResponse,
 115                                                        sizeof(RNDIS_KeepAlive_Complete_t))) != HOST_SENDCONTROL_Successful)
 116         {
 117                 return ErrorCode;
 118         }
 119
 120         return HOST_SENDCONTROL_Successful;
 121 }
 122
 123 /** Initializes the attached RNDIS device's RNDIS interface.
 124  *
 125  *  \param[in] HostMaxPacketSize  Size of the packet buffer on the host
 126  *  \param[out] DeviceMaxPacketSize   Pointer to where the packet buffer size of the device is to be stored
 127  *
 128  *  \return A value from the USB_Host_SendControlErrorCodes_t enum or RNDIS_COMMAND_FAILED if the device returned a
 129  *          logical command failure
 130  */
 131 uint8_t RNDIS_InitializeDevice(uint16_t HostMaxPacketSize, uint16_t* DeviceMaxPacketSize)
 132 {
 133         uint8_t ErrorCode;
 134
 135         RNDIS_Initialize_Message_t  InitMessage;
 136         RNDIS_Initialize_Complete_t InitMessageResponse;
 137
 138         InitMessage.MessageType     = REMOTE_NDIS_INITIALIZE_MSG;
 139         InitMessage.MessageLength   = sizeof(RNDIS_Initialize_Message_t);
 140         InitMessage.RequestId       = RequestID++;
 141
 142         InitMessage.MajorVersion    = REMOTE_NDIS_VERSION_MAJOR;
 143         InitMessage.MinorVersion    = REMOTE_NDIS_VERSION_MINOR;
 144         InitMessage.MaxTransferSize = HostMaxPacketSize;
 145
 146         if ((ErrorCode = RNDIS_SendEncapsulatedCommand(&InitMessage,
 147                                                        sizeof(RNDIS_Initialize_Message_t))) != HOST_SENDCONTROL_Successful)
 148         {
 149                 return ErrorCode;
 150         }
 151
 152         if ((ErrorCode = RNDIS_GetEncapsulatedResponse(&InitMessageResponse,
 153                                                        sizeof(RNDIS_Initialize_Complete_t))) != HOST_SENDCONTROL_Successful)
 154         {
 155                 return ErrorCode;
 156         }
 157
 158         if (InitMessageResponse.Status != REMOTE_NDIS_STATUS_SUCCESS)
 159           return RNDIS_COMMAND_FAILED;
 160
 161         *DeviceMaxPacketSize = InitMessageResponse.MaxTransferSize;
 162
 163         return HOST_SENDCONTROL_Successful;
 164 }
 165
 166 /** Sets a given RNDIS property of an attached RNDIS device.
 167  *
 168  *  \param[in] Oid  OID number of the parameter to set
 169  *  \param[in] Buffer  Pointer to where the property data is to be sourced from
 170  *  \param[in] Length  Length in bytes of the property data to sent to the device
 171  *
 172  *  \return A value from the USB_Host_SendControlErrorCodes_t enum or RNDIS_COMMAND_FAILED if the device returned a
 173  *          logical command failure
 174  */
 175 uint8_t RNDIS_SetRNDISProperty(uint32_t Oid, void* Buffer, uint16_t Length)
 176 {
 177         uint8_t ErrorCode;
 178
 179         struct
 180         {
 181                 RNDIS_Set_Message_t SetMessage;
 182                 uint8_t             ContigiousBuffer[Length];
 183         } SetMessageData;
 184
 185         RNDIS_Set_Complete_t SetMessageResponse;
 186
 187         SetMessageData.SetMessage.MessageType    = REMOTE_NDIS_SET_MSG;
 188         SetMessageData.SetMessage.MessageLength  = sizeof(RNDIS_Set_Message_t) + Length;
 189         SetMessageData.SetMessage.RequestId      = RequestID++;
 190
 191         SetMessageData.SetMessage.Oid            = Oid;
 192         SetMessageData.SetMessage.InformationBufferLength = Length;
 193         SetMessageData.SetMessage.InformationBufferOffset = (sizeof(RNDIS_Set_Message_t) - sizeof(RNDIS_Message_Header_t));
 194         SetMessageData.SetMessage.DeviceVcHandle = 0;
 195
 196         memcpy(&SetMessageData.ContigiousBuffer, Buffer, Length);
 197
 198         if ((ErrorCode = RNDIS_SendEncapsulatedCommand(&SetMessageData,
 199                                                        SetMessageData.SetMessage.MessageLength)) != HOST_SENDCONTROL_Successful)
 200         {
 201                 return ErrorCode;
 202         }
 203
 204         if ((ErrorCode = RNDIS_GetEncapsulatedResponse(&SetMessageResponse,
 205                                                        sizeof(RNDIS_Set_Complete_t))) != HOST_SENDCONTROL_Successful)
 206         {
 207                 return ErrorCode;
 208         }
 209
 210         if (SetMessageResponse.Status != REMOTE_NDIS_STATUS_SUCCESS)
 211           return RNDIS_COMMAND_FAILED;
 212
 213         return HOST_SENDCONTROL_Successful;
 214 }
 215
 216 /** Gets a given RNDIS property of an attached RNDIS device.
 217  *
 218  *  \param[in] Oid  OID number of the parameter to get
 219  *  \param[in] Buffer  Pointer to where the property data is to be written to
 220  *  \param[in] MaxLength  Length in bytes of the destination buffer size
 221  *
 222  *  \return A value from the USB_Host_SendControlErrorCodes_t enum or RNDIS_COMMAND_FAILED if the device returned a
 223  *          logical command failure
 224  */
 225 uint8_t RNDIS_QueryRNDISProperty(uint32_t Oid, void* Buffer, uint16_t MaxLength)
 226 {
 227         uint8_t ErrorCode;
 228
 229         RNDIS_Query_Message_t QueryMessage;
 230
 231         struct
 232         {
 233                 RNDIS_Query_Complete_t QueryMessageResponse;
 234                 uint8_t                ContigiousBuffer[MaxLength];
 235         } QueryMessageResponseData;
 236
 237         QueryMessage.MessageType    = REMOTE_NDIS_QUERY_MSG;
 238         QueryMessage.MessageLength  = sizeof(RNDIS_Query_Message_t);
 239         QueryMessage.RequestId      = RequestID++;
 240
 241         QueryMessage.Oid            = Oid;
 242         QueryMessage.InformationBufferLength = 0;
 243         QueryMessage.InformationBufferOffset = 0;
 244         QueryMessage.DeviceVcHandle = 0;
 245
 246         if ((ErrorCode = RNDIS_SendEncapsulatedCommand(&QueryMessage,
 247                                                        sizeof(RNDIS_Query_Message_t))) != HOST_SENDCONTROL_Successful)
 248         {
 249                 return ErrorCode;
 250         }
 251
 252         if ((ErrorCode = RNDIS_GetEncapsulatedResponse(&QueryMessageResponseData,
 253                                                        sizeof(QueryMessageResponseData))) != HOST_SENDCONTROL_Successful)
 254         {
 255                 return ErrorCode;
 256         }
 257
 258         if (QueryMessageResponseData.QueryMessageResponse.Status != REMOTE_NDIS_STATUS_SUCCESS)
 259           return RNDIS_COMMAND_FAILED;
 260
 261         memcpy(Buffer, &QueryMessageResponseData.ContigiousBuffer, MaxLength);
 262
 263         return HOST_SENDCONTROL_Successful;
 264 }
 265
 266 /** Retrieves the size of a received packet, discarding the remainder of the RNDIS packet header to leave only the
 267  *  packet contents for processing by the host.
 268  *
 269  *  \param[out] PacketLength  Size of the packet currently in the pipe
 270  *
 271  *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
 272  */
 273 uint8_t RNDIS_GetPacketLength(uint16_t* PacketLength)
 274 {
 275         uint8_t ErrorCode;
 276
 277         Pipe_SelectPipe(RNDIS_DATAPIPE_IN);
 278         Pipe_SetPipeToken(PIPE_TOKEN_IN);
 279         Pipe_Unfreeze();
 280
 281         if (!(Pipe_IsReadWriteAllowed()))
 282         {
 283                 *PacketLength = 0;
 284                 Pipe_Freeze();
 285                 return PIPE_RWSTREAM_NoError;
 286         }
 287
 288         RNDIS_Packet_Message_t DeviceMessage;
 289
 290         if ((ErrorCode = Pipe_Read_Stream_LE(&DeviceMessage, sizeof(RNDIS_Packet_Message_t))) != PIPE_RWSTREAM_NoError)
 291         {
 292                 return ErrorCode;
 293         }
 294
 295         *PacketLength = (uint16_t)DeviceMessage.DataLength;
 296
 297         Pipe_Discard_Stream(DeviceMessage.DataOffset - (sizeof(RNDIS_Packet_Message_t) - sizeof(RNDIS_Message_Header_t)));
 298
 299         Pipe_Freeze();
 300
 301         return PIPE_RWSTREAM_NoError;
 302 }