diff options
Diffstat (limited to 'Demos/Device/LowLevel/RNDISEthernet/Lib/RNDIS.c')
-rw-r--r-- | Demos/Device/LowLevel/RNDISEthernet/Lib/RNDIS.c | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/Demos/Device/LowLevel/RNDISEthernet/Lib/RNDIS.c b/Demos/Device/LowLevel/RNDISEthernet/Lib/RNDIS.c new file mode 100644 index 000000000..c5202bcd1 --- /dev/null +++ b/Demos/Device/LowLevel/RNDISEthernet/Lib/RNDIS.c @@ -0,0 +1,394 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2009.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, and distribute this software
+ and its documentation for any purpose and without fee is hereby
+ granted, provided that the above copyright notice appear in all
+ copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ The author disclaim all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ *
+ * RNDIS command handler functions. This handles RNDIS commands according to
+ * the Microsoft RNDIS specification, creating a USB Ethernet network adapter.
+ */
+
+#define INCLUDE_FROM_RNDIS_C
+#include "RNDIS.h"
+
+/* Global Variables: */
+/** Physical MAC address of the network adapter, which becomes the MAC address of the host for packets sent to the adapter. */
+static MAC_Address_t PROGMEM AdapterMACAddress = {ADAPTER_MAC_ADDRESS};
+
+/** Vendor description of the adapter. This is overridden by the INF file required to install the appropriate RNDIS drivers for
+ * the device, but may still be used by the OS in some circumstances.
+ */
+static char PROGMEM AdapterVendorDescription[] = "LUFA RNDIS Adapter";
+
+/** List of RNDIS OID commands supported by this adapter. */
+static const uint32_t PROGMEM AdapterSupportedOIDList[] =
+ {
+ OID_GEN_SUPPORTED_LIST,
+ OID_GEN_PHYSICAL_MEDIUM,
+ OID_GEN_HARDWARE_STATUS,
+ OID_GEN_MEDIA_SUPPORTED,
+ OID_GEN_MEDIA_IN_USE,
+ OID_GEN_MAXIMUM_FRAME_SIZE,
+ OID_GEN_MAXIMUM_TOTAL_SIZE,
+ OID_GEN_LINK_SPEED,
+ OID_GEN_TRANSMIT_BLOCK_SIZE,
+ OID_GEN_RECEIVE_BLOCK_SIZE,
+ OID_GEN_VENDOR_ID,
+ OID_GEN_VENDOR_DESCRIPTION,
+ OID_GEN_CURRENT_PACKET_FILTER,
+ OID_GEN_MAXIMUM_TOTAL_SIZE,
+ OID_GEN_MEDIA_CONNECT_STATUS,
+ OID_GEN_XMIT_OK,
+ OID_GEN_RCV_OK,
+ OID_GEN_XMIT_ERROR,
+ OID_GEN_RCV_ERROR,
+ OID_GEN_RCV_NO_BUFFER,
+ OID_802_3_PERMANENT_ADDRESS,
+ OID_802_3_CURRENT_ADDRESS,
+ OID_802_3_MULTICAST_LIST,
+ OID_802_3_MAXIMUM_LIST_SIZE,
+ OID_802_3_RCV_ERROR_ALIGNMENT,
+ OID_802_3_XMIT_ONE_COLLISION,
+ OID_802_3_XMIT_MORE_COLLISIONS,
+ };
+
+/** Buffer for RNDIS messages (as distinct from Ethernet frames sent through the adapter. This must be big enough to hold the entire
+ * Supported OID list, plus the response header. The buffer is half-duplex, and is written to as it is read to save on SRAM - for this
+ * reason, care must be taken when constructing RNDIS responses that unread data is not overwritten when writing in responses.
+ */
+uint8_t RNDISMessageBuffer[sizeof(AdapterSupportedOIDList) + sizeof(RNDIS_QUERY_CMPLT_t)];
+
+/** Pointer to the RNDIS message header at the top of the RNDIS message buffer, for convenience. */
+RNDIS_Message_Header_t* MessageHeader = (RNDIS_Message_Header_t*)&RNDISMessageBuffer;
+
+/** Indicates if a RNDIS message response is ready to be sent back to the host. */
+bool ResponseReady = false;
+
+/** Current RNDIS adapter state, a value from the RNDIS_States_t enum. */
+uint8_t CurrRNDISState = RNDIS_Uninitialized;
+
+/** Current Ethernet packet filter mask. This is non-zero when the adapter is initialized, or zero when disabled. */
+uint32_t CurrPacketFilter = 0;
+
+
+/** Processes the RNDIS message received by the host and stored in the RNDISMessageBuffer global buffer. If a response is
+ * created, the ResponseReady global is updated so that the response is written back to the host upon request.
+ */
+void ProcessRNDISControlMessage(void)
+{
+ /* Note: Only a single buffer is used for both the received message and its response to save SRAM. Because of
+ this, response bytes should be filled in order so that they do not clobber unread data in the buffer. */
+
+ switch (MessageHeader->MessageType)
+ {
+ case REMOTE_NDIS_INITIALIZE_MSG:
+ /* Initialize the adapter - return information about the supported RNDIS version and buffer sizes */
+
+ ResponseReady = true;
+
+ RNDIS_INITIALIZE_MSG_t* INITIALIZE_Message = (RNDIS_INITIALIZE_MSG_t*)&RNDISMessageBuffer;
+ RNDIS_INITIALIZE_CMPLT_t* INITIALIZE_Response = (RNDIS_INITIALIZE_CMPLT_t*)&RNDISMessageBuffer;
+
+ INITIALIZE_Response->MessageType = REMOTE_NDIS_INITIALIZE_CMPLT;
+ INITIALIZE_Response->MessageLength = sizeof(RNDIS_INITIALIZE_CMPLT_t);
+ INITIALIZE_Response->RequestId = INITIALIZE_Message->RequestId;
+ INITIALIZE_Response->Status = REMOTE_NDIS_STATUS_SUCCESS;
+
+ INITIALIZE_Response->MajorVersion = REMOTE_NDIS_VERSION_MAJOR;
+ INITIALIZE_Response->MinorVersion = REMOTE_NDIS_VERSION_MINOR;
+ INITIALIZE_Response->DeviceFlags = REMOTE_NDIS_DF_CONNECTIONLESS;
+ INITIALIZE_Response->Medium = REMOTE_NDIS_MEDIUM_802_3;
+ INITIALIZE_Response->MaxPacketsPerTransfer = 1;
+ INITIALIZE_Response->MaxTransferSize = (sizeof(RNDIS_PACKET_MSG_t) + ETHERNET_FRAME_SIZE_MAX);
+ INITIALIZE_Response->PacketAlignmentFactor = 0;
+ INITIALIZE_Response->AFListOffset = 0;
+ INITIALIZE_Response->AFListSize = 0;
+
+ CurrRNDISState = RNDIS_Initialized;
+
+ break;
+ case REMOTE_NDIS_HALT_MSG:
+ /* Halt the adapter, reset the adapter state - note that no response should be returned when completed */
+
+ ResponseReady = false;
+ MessageHeader->MessageLength = 0;
+
+ CurrRNDISState = RNDIS_Uninitialized;
+
+ break;
+ case REMOTE_NDIS_QUERY_MSG:
+ /* Request for information about a parameter about the adapter, specified as an OID token */
+
+ ResponseReady = true;
+
+ RNDIS_QUERY_MSG_t* QUERY_Message = (RNDIS_QUERY_MSG_t*)&RNDISMessageBuffer;
+ RNDIS_QUERY_CMPLT_t* QUERY_Response = (RNDIS_QUERY_CMPLT_t*)&RNDISMessageBuffer;
+ uint32_t Query_Oid = QUERY_Message->Oid;
+
+ void* QueryData = &RNDISMessageBuffer[sizeof(RNDIS_Message_Header_t) +
+ QUERY_Message->InformationBufferOffset];
+ void* ResponseData = &RNDISMessageBuffer[sizeof(RNDIS_QUERY_CMPLT_t)];
+ uint16_t ResponseSize;
+
+ QUERY_Response->MessageType = REMOTE_NDIS_QUERY_CMPLT;
+ QUERY_Response->MessageLength = sizeof(RNDIS_QUERY_CMPLT_t);
+
+ if (ProcessNDISQuery(Query_Oid, QueryData, QUERY_Message->InformationBufferLength,
+ ResponseData, &ResponseSize))
+ {
+ QUERY_Response->Status = REMOTE_NDIS_STATUS_SUCCESS;
+ QUERY_Response->MessageLength += ResponseSize;
+
+ QUERY_Response->InformationBufferLength = ResponseSize;
+ QUERY_Response->InformationBufferOffset = (sizeof(RNDIS_QUERY_CMPLT_t) - sizeof(RNDIS_Message_Header_t));
+ }
+ else
+ {
+ QUERY_Response->Status = REMOTE_NDIS_STATUS_NOT_SUPPORTED;
+
+ QUERY_Response->InformationBufferLength = 0;
+ QUERY_Response->InformationBufferOffset = 0;
+ }
+
+ break;
+ case REMOTE_NDIS_SET_MSG:
+ /* Request to set a parameter of the adapter, specified as an OID token */
+
+ ResponseReady = true;
+
+ RNDIS_SET_MSG_t* SET_Message = (RNDIS_SET_MSG_t*)&RNDISMessageBuffer;
+ RNDIS_SET_CMPLT_t* SET_Response = (RNDIS_SET_CMPLT_t*)&RNDISMessageBuffer;
+ uint32_t SET_Oid = SET_Message->Oid;
+
+ SET_Response->MessageType = REMOTE_NDIS_SET_CMPLT;
+ SET_Response->MessageLength = sizeof(RNDIS_SET_CMPLT_t);
+ SET_Response->RequestId = SET_Message->RequestId;
+
+ void* SetData = &RNDISMessageBuffer[sizeof(RNDIS_Message_Header_t) +
+ SET_Message->InformationBufferOffset];
+
+ if (ProcessNDISSet(SET_Oid, SetData, SET_Message->InformationBufferLength))
+ SET_Response->Status = REMOTE_NDIS_STATUS_SUCCESS;
+ else
+ SET_Response->Status = REMOTE_NDIS_STATUS_NOT_SUPPORTED;
+
+ break;
+ case REMOTE_NDIS_RESET_MSG:
+ /* Soft reset the adapter */
+
+ ResponseReady = true;
+
+ RNDIS_RESET_CMPLT_t* RESET_Response = (RNDIS_RESET_CMPLT_t*)&RNDISMessageBuffer;
+
+ RESET_Response->MessageType = REMOTE_NDIS_RESET_CMPLT;
+ RESET_Response->MessageLength = sizeof(RNDIS_RESET_CMPLT_t);
+ RESET_Response->Status = REMOTE_NDIS_STATUS_SUCCESS;
+ RESET_Response->AddressingReset = 0;
+
+ break;
+ case REMOTE_NDIS_KEEPALIVE_MSG:
+ /* Keep alive message sent to the adapter every 5 seconds when idle to ensure it is still responding */
+
+ ResponseReady = true;
+
+ RNDIS_KEEPALIVE_MSG_t* KEEPALIVE_Message = (RNDIS_KEEPALIVE_MSG_t*)&RNDISMessageBuffer;
+ RNDIS_KEEPALIVE_CMPLT_t* KEEPALIVE_Response = (RNDIS_KEEPALIVE_CMPLT_t*)&RNDISMessageBuffer;
+
+ KEEPALIVE_Response->MessageType = REMOTE_NDIS_KEEPALIVE_CMPLT;
+ KEEPALIVE_Response->MessageLength = sizeof(RNDIS_KEEPALIVE_CMPLT_t);
+ KEEPALIVE_Response->RequestId = KEEPALIVE_Message->RequestId;
+ KEEPALIVE_Response->Status = REMOTE_NDIS_STATUS_SUCCESS;
+
+ break;
+ }
+}
+
+/** Processes RNDIS query commands, retrieving information from the adapter and reporting it back to the host. The requested
+ * parameter is given as an OID value.
+ *
+ * \param OId OId value of the parameter being queried
+ * \param QueryData Pointer to any extra query data being sent by the host to the device inside the RNDIS message buffer
+ * \param QuerySize Size in bytes of the extra query data being sent by the host
+ * \param ResponseData Pointer to the start of the query response inside the RNDIS message buffer
+ * \param ResponseSize Pointer to the size in bytes of the response data being sent to the host
+ *
+ * \return Boolean true if the query was handled, false otherwise
+ */
+static bool ProcessNDISQuery(uint32_t OId, void* QueryData, uint16_t QuerySize,
+ void* ResponseData, uint16_t* ResponseSize)
+{
+ /* Handler for REMOTE_NDIS_QUERY_MSG messages */
+
+ switch (OId)
+ {
+ case OID_GEN_SUPPORTED_LIST:
+ *ResponseSize = sizeof(AdapterSupportedOIDList);
+
+ /* Copy the list of supported NDIS OID tokens to the response buffer */
+ memcpy_P(ResponseData, AdapterSupportedOIDList, sizeof(AdapterSupportedOIDList));
+
+ return true;
+ case OID_GEN_PHYSICAL_MEDIUM:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Indicate that the device is a true ethernet link */
+ *((uint32_t*)ResponseData) = 0;
+
+ return true;
+ case OID_GEN_HARDWARE_STATUS:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Always indicate hardware ready */
+ *((uint32_t*)ResponseData) = NdisHardwareStatusReady;
+
+ return true;
+ case OID_GEN_MEDIA_SUPPORTED:
+ case OID_GEN_MEDIA_IN_USE:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Indicate 802.3 (Ethernet) supported by the adapter */
+ *((uint32_t*)ResponseData) = REMOTE_NDIS_MEDIUM_802_3;
+
+ return true;
+ case OID_GEN_VENDOR_ID:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Vendor ID 0x0xFFFFFF is reserved for vendors who have not purchased a NDIS VID */
+ *((uint32_t*)ResponseData) = 0x00FFFFFF;
+
+ return true;
+ case OID_GEN_MAXIMUM_FRAME_SIZE:
+ case OID_GEN_TRANSMIT_BLOCK_SIZE:
+ case OID_GEN_RECEIVE_BLOCK_SIZE:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Indicate that the maximum frame size is the size of the ethernet frame buffer */
+ *((uint32_t*)ResponseData) = ETHERNET_FRAME_SIZE_MAX;
+
+ return true;
+ case OID_GEN_VENDOR_DESCRIPTION:
+ *ResponseSize = sizeof(AdapterVendorDescription);
+
+ /* Copy vendor description string to the response buffer */
+ memcpy_P(ResponseData, AdapterVendorDescription, sizeof(AdapterVendorDescription));
+
+ return true;
+ case OID_GEN_MEDIA_CONNECT_STATUS:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Always indicate that the adapter is connected to a network */
+ *((uint32_t*)ResponseData) = REMOTE_NDIS_MEDIA_STATE_CONNECTED;
+
+ return true;
+ case OID_GEN_LINK_SPEED:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Indicate 10Mb/s link speed */
+ *((uint32_t*)ResponseData) = 100000;
+
+ return true;
+ case OID_802_3_PERMANENT_ADDRESS:
+ case OID_802_3_CURRENT_ADDRESS:
+ *ResponseSize = sizeof(MAC_Address_t);
+
+ /* Copy over the fixed adapter MAC to the response buffer */
+ memcpy_P(ResponseData, &AdapterMACAddress, sizeof(MAC_Address_t));
+
+ return true;
+ case OID_802_3_MAXIMUM_LIST_SIZE:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Indicate only one multicast address supported */
+ *((uint32_t*)ResponseData) = 1;
+
+ return true;
+ case OID_GEN_CURRENT_PACKET_FILTER:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Indicate the current packet filter mask */
+ *((uint32_t*)ResponseData) = CurrPacketFilter;
+
+ return true;
+ case OID_GEN_XMIT_OK:
+ case OID_GEN_RCV_OK:
+ case OID_GEN_XMIT_ERROR:
+ case OID_GEN_RCV_ERROR:
+ case OID_GEN_RCV_NO_BUFFER:
+ case OID_802_3_RCV_ERROR_ALIGNMENT:
+ case OID_802_3_XMIT_ONE_COLLISION:
+ case OID_802_3_XMIT_MORE_COLLISIONS:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Unused statistic OIDs - always return 0 for each */
+ *((uint32_t*)ResponseData) = 0;
+
+ return true;
+ case OID_GEN_MAXIMUM_TOTAL_SIZE:
+ *ResponseSize = sizeof(uint32_t);
+
+ /* Indicate maximum overall buffer (Ethernet frame and RNDIS header) the adapter can handle */
+ *((uint32_t*)ResponseData) = (sizeof(RNDISMessageBuffer) + ETHERNET_FRAME_SIZE_MAX);
+
+ return true;
+ default:
+ return false;
+ }
+}
+
+/** Processes RNDIS set commands, setting adapter parameters to values given by the host. The requested parameter is given
+ * as an OID value.
+ *
+ * \param OId OId value of the parameter being set
+ * \param SetData Pointer to the parameter value in the RNDIS message buffer
+ * \param SetSize Size in bytes of the parameter value being sent by the host
+ *
+ * \return Boolean true if the set was handled, false otherwise
+ */
+static bool ProcessNDISSet(uint32_t OId, void* SetData, uint16_t SetSize)
+{
+ /* Handler for REMOTE_NDIS_SET_MSG messages */
+
+ switch (OId)
+ {
+ case OID_GEN_CURRENT_PACKET_FILTER:
+ /* Save the packet filter mask in case the host queries it again later */
+ CurrPacketFilter = *((uint32_t*)SetData);
+
+ /* Set the RNDIS state to initialized if the packet filter is non-zero */
+ CurrRNDISState = ((CurrPacketFilter) ? RNDIS_Data_Initialized : RNDIS_Data_Initialized);
+
+ return true;
+ case OID_802_3_MULTICAST_LIST:
+ /* Do nothing - throw away the value from the host as it is unused */
+
+ return true;
+ default:
+ return false;
+ }
+}
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