123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083 |
- /**@file
- Berkeley Packet Filter implementation of the EMU_SNP_PROTOCOL that allows the
- emulator to get on real networks.
- Tested on Mac OS X.
- Copyright (c) 2004 - 2019, Intel Corporation. All rights reserved.<BR>
- Portions copyright (c) 2011, Apple Inc. All rights reserved.
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include "Host.h"
- #ifdef __APPLE__
- #include <Library/NetLib.h>
- #define EMU_SNP_PRIVATE_SIGNATURE SIGNATURE_32('E', 'M', 's', 'n')
- typedef struct {
- UINTN Signature;
- EMU_IO_THUNK_PROTOCOL *Thunk;
- EMU_SNP_PROTOCOL EmuSnp;
- EFI_SIMPLE_NETWORK_MODE *Mode;
- int BpfFd;
- char *InterfaceName;
- EFI_MAC_ADDRESS MacAddress;
- u_int ReadBufferSize;
- VOID *ReadBuffer;
- //
- // Two walking pointers to manage the multiple packets that can be returned
- // in a single read.
- //
- VOID *CurrentReadPointer;
- VOID *EndReadPointer;
- UINT32 ReceivedPackets;
- UINT32 DroppedPackets;
- } EMU_SNP_PRIVATE;
- #define EMU_SNP_PRIVATE_DATA_FROM_THIS(a) \
- CR(a, EMU_SNP_PRIVATE, EmuSnp, EMU_SNP_PRIVATE_SIGNATURE)
- //
- // Strange, but there doesn't appear to be any structure for the Ethernet header in edk2...
- //
- typedef struct {
- UINT8 DstAddr[NET_ETHER_ADDR_LEN];
- UINT8 SrcAddr[NET_ETHER_ADDR_LEN];
- UINT16 Type;
- } ETHERNET_HEADER;
- /**
- Register storage for SNP Mode.
- @param This Protocol instance pointer.
- @param Mode SimpleNetworkProtocol Mode structure passed into driver.
- @retval EFI_SUCCESS The network interface was started.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- **/
- EFI_STATUS
- EmuSnpCreateMapping (
- IN EMU_SNP_PROTOCOL *This,
- IN EFI_SIMPLE_NETWORK_MODE *Mode
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- Private->Mode = Mode;
- //
- // Set the broadcast address.
- //
- SetMem (&Mode->BroadcastAddress, sizeof (EFI_MAC_ADDRESS), 0xFF);
- CopyMem (&Mode->CurrentAddress, &Private->MacAddress, sizeof (EFI_MAC_ADDRESS));
- CopyMem (&Mode->PermanentAddress, &Private->MacAddress, sizeof (EFI_MAC_ADDRESS));
- //
- // Since the fake SNP is based on a real NIC, to avoid conflict with the host NIC
- // network stack, we use a different MAC address.
- // So just change the last byte of the MAC address for the real NIC.
- //
- Mode->CurrentAddress.Addr[NET_ETHER_ADDR_LEN - 1]++;
- return EFI_SUCCESS;
- }
- static struct bpf_insn mFilterInstructionTemplate[] = {
- // Load 4 bytes from the destination MAC address.
- BPF_STMT (BPF_LD + BPF_W + BPF_ABS, OFFSET_OF (ETHERNET_HEADER, DstAddr[0])),
- // Compare to first 4 bytes of fake MAC address.
- BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 0x12345678, 0, 3),
- // Load remaining 2 bytes from the destination MAC address.
- BPF_STMT (BPF_LD + BPF_H + BPF_ABS, OFFSET_OF (ETHERNET_HEADER, DstAddr[4])),
- // Compare to remaining 2 bytes of fake MAC address.
- BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 0x9ABC, 5, 0),
- // Load 4 bytes from the destination MAC address.
- BPF_STMT (BPF_LD + BPF_W + BPF_ABS, OFFSET_OF (ETHERNET_HEADER, DstAddr[0])),
- // Compare to first 4 bytes of broadcast MAC address.
- BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 0xFFFFFFFF, 0, 2),
- // Load remaining 2 bytes from the destination MAC address.
- BPF_STMT (BPF_LD + BPF_H + BPF_ABS, OFFSET_OF (ETHERNET_HEADER, DstAddr[4])),
- // Compare to remaining 2 bytes of broadcast MAC address.
- BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 0xFFFF, 1, 0),
- // Reject packet.
- BPF_STMT (BPF_RET + BPF_K, 0),
- // Receive entire packet.
- BPF_STMT (BPF_RET + BPF_K, -1)
- };
- EFI_STATUS
- OpenBpfFileDescriptor (
- IN EMU_SNP_PRIVATE *Private,
- OUT int *Fd
- )
- {
- char BfpDeviceName[256];
- int Index;
- //
- // Open a Berkeley Packet Filter device. This must be done as root, so this is probably
- // the place which is most likely to fail...
- //
- for (Index = 0; TRUE; Index++ ) {
- snprintf (BfpDeviceName, sizeof (BfpDeviceName), "/dev/bpf%d", Index);
- *Fd = open (BfpDeviceName, O_RDWR, 0);
- if ( *Fd >= 0 ) {
- return EFI_SUCCESS;
- }
- if (errno == EACCES) {
- printf (
- "SNP: Permissions on '%s' are incorrect. Fix with 'sudo chmod 666 %s'.\n",
- BfpDeviceName,
- BfpDeviceName
- );
- }
- if (errno != EBUSY) {
- break;
- }
- }
- return EFI_OUT_OF_RESOURCES;
- }
- /**
- Changes the state of a network interface from "stopped" to "started".
- @param This Protocol instance pointer.
- @retval EFI_SUCCESS The network interface was started.
- @retval EFI_ALREADY_STARTED The network interface is already in the started state.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpStart (
- IN EMU_SNP_PROTOCOL *This
- )
- {
- EFI_STATUS Status;
- EMU_SNP_PRIVATE *Private;
- struct ifreq BoundIf;
- struct bpf_program BpfProgram;
- struct bpf_insn *FilterProgram;
- u_int Value;
- u_int ReadBufferSize;
- UINT16 Temp16;
- UINT32 Temp32;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- switch (Private->Mode->State) {
- case EfiSimpleNetworkStopped:
- break;
- case EfiSimpleNetworkStarted:
- case EfiSimpleNetworkInitialized:
- return EFI_ALREADY_STARTED;
- break;
- default:
- return EFI_DEVICE_ERROR;
- break;
- }
- Status = EFI_SUCCESS;
- Private->ReadBuffer = NULL;
- if (Private->BpfFd == 0) {
- Status = OpenBpfFileDescriptor (Private, &Private->BpfFd);
- if (EFI_ERROR (Status)) {
- goto DeviceErrorExit;
- }
- //
- // Get the read buffer size.
- //
- if (ioctl (Private->BpfFd, BIOCGBLEN, &ReadBufferSize) < 0) {
- goto DeviceErrorExit;
- }
- //
- // Default value from BIOCGBLEN is usually too small, so use a much larger size, if necessary.
- //
- if (ReadBufferSize < FixedPcdGet32 (PcdNetworkPacketFilterSize)) {
- ReadBufferSize = FixedPcdGet32 (PcdNetworkPacketFilterSize);
- if (ioctl (Private->BpfFd, BIOCSBLEN, &ReadBufferSize) < 0) {
- goto DeviceErrorExit;
- }
- }
- //
- // Associate our interface with this BPF file descriptor.
- //
- AsciiStrCpyS (BoundIf.ifr_name, sizeof (BoundIf.ifr_name), Private->InterfaceName);
- if (ioctl (Private->BpfFd, BIOCSETIF, &BoundIf) < 0) {
- goto DeviceErrorExit;
- }
- //
- // Enable immediate mode.
- //
- Value = 1;
- if (ioctl (Private->BpfFd, BIOCIMMEDIATE, &Value) < 0) {
- goto DeviceErrorExit;
- }
- //
- // Enable non-blocking I/O.
- //
- if (fcntl (Private->BpfFd, F_GETFL, 0) == -1) {
- goto DeviceErrorExit;
- }
- Value |= O_NONBLOCK;
- if (fcntl (Private->BpfFd, F_SETFL, Value) == -1) {
- goto DeviceErrorExit;
- }
- //
- // Disable "header complete" flag. This means the supplied source MAC address is
- // what goes on the wire.
- //
- Value = 1;
- if (ioctl (Private->BpfFd, BIOCSHDRCMPLT, &Value) < 0) {
- goto DeviceErrorExit;
- }
- //
- // Allocate read buffer.
- //
- Private->ReadBufferSize = ReadBufferSize;
- Private->ReadBuffer = malloc (Private->ReadBufferSize);
- if (Private->ReadBuffer == NULL) {
- goto ErrorExit;
- }
- Private->CurrentReadPointer = Private->EndReadPointer = Private->ReadBuffer;
- //
- // Install our packet filter: successful reads should only produce broadcast or unicast
- // packets directed to our fake MAC address.
- //
- FilterProgram = malloc (sizeof (mFilterInstructionTemplate));
- if ( FilterProgram == NULL ) {
- goto ErrorExit;
- }
- CopyMem (FilterProgram, &mFilterInstructionTemplate, sizeof (mFilterInstructionTemplate));
- //
- // Insert out fake MAC address into the filter. The data has to be host endian.
- //
- CopyMem (&Temp32, &Private->Mode->CurrentAddress.Addr[0], sizeof (UINT32));
- FilterProgram[1].k = NTOHL (Temp32);
- CopyMem (&Temp16, &Private->Mode->CurrentAddress.Addr[4], sizeof (UINT16));
- FilterProgram[3].k = NTOHS (Temp16);
- BpfProgram.bf_len = sizeof (mFilterInstructionTemplate) / sizeof (struct bpf_insn);
- BpfProgram.bf_insns = FilterProgram;
- if (ioctl (Private->BpfFd, BIOCSETF, &BpfProgram) < 0) {
- goto DeviceErrorExit;
- }
- free (FilterProgram);
- //
- // Enable promiscuous mode.
- //
- if (ioctl (Private->BpfFd, BIOCPROMISC, 0) < 0) {
- goto DeviceErrorExit;
- }
- Private->Mode->State = EfiSimpleNetworkStarted;
- }
- return Status;
- DeviceErrorExit:
- Status = EFI_DEVICE_ERROR;
- ErrorExit:
- if (Private->ReadBuffer != NULL) {
- free (Private->ReadBuffer);
- Private->ReadBuffer = NULL;
- }
- return Status;
- }
- /**
- Changes the state of a network interface from "started" to "stopped".
- @param This Protocol instance pointer.
- @retval EFI_SUCCESS The network interface was stopped.
- @retval EFI_ALREADY_STARTED The network interface is already in the stopped state.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpStop (
- IN EMU_SNP_PROTOCOL *This
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- switch ( Private->Mode->State ) {
- case EfiSimpleNetworkStarted:
- break;
- case EfiSimpleNetworkStopped:
- return EFI_NOT_STARTED;
- break;
- default:
- return EFI_DEVICE_ERROR;
- break;
- }
- if (Private->BpfFd != 0) {
- close (Private->BpfFd);
- Private->BpfFd = 0;
- }
- if (Private->ReadBuffer != NULL) {
- free (Private->ReadBuffer);
- Private->CurrentReadPointer = Private->EndReadPointer = Private->ReadBuffer = NULL;
- }
- Private->Mode->State = EfiSimpleNetworkStopped;
- return EFI_SUCCESS;
- }
- /**
- Resets a network adapter and allocates the transmit and receive buffers
- required by the network interface; optionally, also requests allocation
- of additional transmit and receive buffers.
- @param This The protocol instance pointer.
- @param ExtraRxBufferSize The size, in bytes, of the extra receive buffer space
- that the driver should allocate for the network interface.
- Some network interfaces will not be able to use the extra
- buffer, and the caller will not know if it is actually
- being used.
- @param ExtraTxBufferSize The size, in bytes, of the extra transmit buffer space
- that the driver should allocate for the network interface.
- Some network interfaces will not be able to use the extra
- buffer, and the caller will not know if it is actually
- being used.
- @retval EFI_SUCCESS The network interface was initialized.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_OUT_OF_RESOURCES There was not enough memory for the transmit and
- receive buffers.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpInitialize (
- IN EMU_SNP_PROTOCOL *This,
- IN UINTN ExtraRxBufferSize OPTIONAL,
- IN UINTN ExtraTxBufferSize OPTIONAL
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- switch ( Private->Mode->State ) {
- case EfiSimpleNetworkStarted:
- break;
- case EfiSimpleNetworkStopped:
- return EFI_NOT_STARTED;
- break;
- default:
- return EFI_DEVICE_ERROR;
- break;
- }
- Private->Mode->MCastFilterCount = 0;
- Private->Mode->ReceiveFilterSetting = 0;
- ZeroMem (Private->Mode->MCastFilter, sizeof (Private->Mode->MCastFilter));
- Private->Mode->State = EfiSimpleNetworkInitialized;
- return EFI_SUCCESS;
- }
- /**
- Resets a network adapter and re-initializes it with the parameters that were
- provided in the previous call to Initialize().
- @param This The protocol instance pointer.
- @param ExtendedVerification Indicates that the driver may perform a more
- exhaustive verification operation of the device
- during reset.
- @retval EFI_SUCCESS The network interface was reset.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpReset (
- IN EMU_SNP_PROTOCOL *This,
- IN BOOLEAN ExtendedVerification
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- switch ( Private->Mode->State ) {
- case EfiSimpleNetworkInitialized:
- break;
- case EfiSimpleNetworkStopped:
- return EFI_NOT_STARTED;
- break;
- default:
- return EFI_DEVICE_ERROR;
- break;
- }
- return EFI_SUCCESS;
- }
- /**
- Resets a network adapter and leaves it in a state that is safe for
- another driver to initialize.
- @param This Protocol instance pointer.
- @retval EFI_SUCCESS The network interface was shutdown.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpShutdown (
- IN EMU_SNP_PROTOCOL *This
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- switch ( Private->Mode->State ) {
- case EfiSimpleNetworkInitialized:
- break;
- case EfiSimpleNetworkStopped:
- return EFI_NOT_STARTED;
- break;
- default:
- return EFI_DEVICE_ERROR;
- break;
- }
- Private->Mode->State = EfiSimpleNetworkStarted;
- Private->Mode->ReceiveFilterSetting = 0;
- Private->Mode->MCastFilterCount = 0;
- ZeroMem (Private->Mode->MCastFilter, sizeof (Private->Mode->MCastFilter));
- if (Private->BpfFd != 0) {
- close (Private->BpfFd);
- Private->BpfFd = 0;
- }
- if (Private->ReadBuffer != NULL) {
- free (Private->ReadBuffer);
- Private->CurrentReadPointer = Private->EndReadPointer = Private->ReadBuffer = NULL;
- }
- return EFI_SUCCESS;
- }
- /**
- Manages the multicast receive filters of a network interface.
- @param This The protocol instance pointer.
- @param Enable A bit mask of receive filters to enable on the network interface.
- @param Disable A bit mask of receive filters to disable on the network interface.
- @param ResetMCastFilter Set to TRUE to reset the contents of the multicast receive
- filters on the network interface to their default values.
- @param McastFilterCnt Number of multicast HW MAC addresses in the new
- MCastFilter list. This value must be less than or equal to
- the MCastFilterCnt field of EMU_SNP_MODE. This
- field is optional if ResetMCastFilter is TRUE.
- @param MCastFilter A pointer to a list of new multicast receive filter HW MAC
- addresses. This list will replace any existing multicast
- HW MAC address list. This field is optional if
- ResetMCastFilter is TRUE.
- @retval EFI_SUCCESS The multicast receive filter list was updated.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpReceiveFilters (
- IN EMU_SNP_PROTOCOL *This,
- IN UINT32 Enable,
- IN UINT32 Disable,
- IN BOOLEAN ResetMCastFilter,
- IN UINTN MCastFilterCnt OPTIONAL,
- IN EFI_MAC_ADDRESS *MCastFilter OPTIONAL
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- // For now, just succeed...
- return EFI_SUCCESS;
- }
- /**
- Modifies or resets the current station address, if supported.
- @param This The protocol instance pointer.
- @param Reset Flag used to reset the station address to the network interfaces
- permanent address.
- @param New The new station address to be used for the network interface.
- @retval EFI_SUCCESS The network interfaces station address was updated.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpStationAddress (
- IN EMU_SNP_PROTOCOL *This,
- IN BOOLEAN Reset,
- IN EFI_MAC_ADDRESS *New OPTIONAL
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- return EFI_UNSUPPORTED;
- }
- /**
- Resets or collects the statistics on a network interface.
- @param This Protocol instance pointer.
- @param Reset Set to TRUE to reset the statistics for the network interface.
- @param StatisticsSize On input the size, in bytes, of StatisticsTable. On
- output the size, in bytes, of the resulting table of
- statistics.
- @param StatisticsTable A pointer to the EFI_NETWORK_STATISTICS structure that
- contains the statistics.
- @retval EFI_SUCCESS The statistics were collected from the network interface.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_BUFFER_TOO_SMALL The Statistics buffer was too small. The current buffer
- size needed to hold the statistics is returned in
- StatisticsSize.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpStatistics (
- IN EMU_SNP_PROTOCOL *This,
- IN BOOLEAN Reset,
- IN OUT UINTN *StatisticsSize OPTIONAL,
- OUT EFI_NETWORK_STATISTICS *StatisticsTable OPTIONAL
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- return EFI_UNSUPPORTED;
- }
- /**
- Converts a multicast IP address to a multicast HW MAC address.
- @param This The protocol instance pointer.
- @param IPv6 Set to TRUE if the multicast IP address is IPv6 [RFC 2460]. Set
- to FALSE if the multicast IP address is IPv4 [RFC 791].
- @param IP The multicast IP address that is to be converted to a multicast
- HW MAC address.
- @param MAC The multicast HW MAC address that is to be generated from IP.
- @retval EFI_SUCCESS The multicast IP address was mapped to the multicast
- HW MAC address.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_BUFFER_TOO_SMALL The Statistics buffer was too small. The current buffer
- size needed to hold the statistics is returned in
- StatisticsSize.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpMCastIpToMac (
- IN EMU_SNP_PROTOCOL *This,
- IN BOOLEAN IPv6,
- IN EFI_IP_ADDRESS *IP,
- OUT EFI_MAC_ADDRESS *MAC
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- return EFI_UNSUPPORTED;
- }
- /**
- Performs read and write operations on the NVRAM device attached to a
- network interface.
- @param This The protocol instance pointer.
- @param ReadWrite TRUE for read operations, FALSE for write operations.
- @param Offset Byte offset in the NVRAM device at which to start the read or
- write operation. This must be a multiple of NvRamAccessSize and
- less than NvRamSize.
- @param BufferSize The number of bytes to read or write from the NVRAM device.
- This must also be a multiple of NvramAccessSize.
- @param Buffer A pointer to the data buffer.
- @retval EFI_SUCCESS The NVRAM access was performed.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpNvData (
- IN EMU_SNP_PROTOCOL *This,
- IN BOOLEAN ReadWrite,
- IN UINTN Offset,
- IN UINTN BufferSize,
- IN OUT VOID *Buffer
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- return EFI_UNSUPPORTED;
- }
- /**
- Reads the current interrupt status and recycled transmit buffer status from
- a network interface.
- @param This The protocol instance pointer.
- @param InterruptStatus A pointer to the bit mask of the currently active interrupts
- If this is NULL, the interrupt status will not be read from
- the device. If this is not NULL, the interrupt status will
- be read from the device. When the interrupt status is read,
- it will also be cleared. Clearing the transmit interrupt
- does not empty the recycled transmit buffer array.
- @param TxBuf Recycled transmit buffer address. The network interface will
- not transmit if its internal recycled transmit buffer array
- is full. Reading the transmit buffer does not clear the
- transmit interrupt. If this is NULL, then the transmit buffer
- status will not be read. If there are no transmit buffers to
- recycle and TxBuf is not NULL, * TxBuf will be set to NULL.
- @retval EFI_SUCCESS The status of the network interface was retrieved.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpGetStatus (
- IN EMU_SNP_PROTOCOL *This,
- OUT UINT32 *InterruptStatus OPTIONAL,
- OUT VOID **TxBuf OPTIONAL
- )
- {
- EMU_SNP_PRIVATE *Private;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- if ( InterruptStatus != NULL ) {
- *InterruptStatus = EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
- }
- return EFI_SUCCESS;
- }
- /**
- Places a packet in the transmit queue of a network interface.
- @param This The protocol instance pointer.
- @param HeaderSize The size, in bytes, of the media header to be filled in by
- the Transmit() function. If HeaderSize is non-zero, then it
- must be equal to This->Mode->MediaHeaderSize and the DestAddr
- and Protocol parameters must not be NULL.
- @param BufferSize The size, in bytes, of the entire packet (media header and
- data) to be transmitted through the network interface.
- @param Buffer A pointer to the packet (media header followed by data) to be
- transmitted. This parameter cannot be NULL. If HeaderSize is zero,
- then the media header in Buffer must already be filled in by the
- caller. If HeaderSize is non-zero, then the media header will be
- filled in by the Transmit() function.
- @param SrcAddr The source HW MAC address. If HeaderSize is zero, then this parameter
- is ignored. If HeaderSize is non-zero and SrcAddr is NULL, then
- This->Mode->CurrentAddress is used for the source HW MAC address.
- @param DestAddr The destination HW MAC address. If HeaderSize is zero, then this
- parameter is ignored.
- @param Protocol The type of header to build. If HeaderSize is zero, then this
- parameter is ignored. See RFC 1700, section "Ether Types", for
- examples.
- @retval EFI_SUCCESS The packet was placed on the transmit queue.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_NOT_READY The network interface is too busy to accept this transmit request.
- @retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpTransmit (
- IN EMU_SNP_PROTOCOL *This,
- IN UINTN HeaderSize,
- IN UINTN BufferSize,
- IN VOID *Buffer,
- IN EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
- IN EFI_MAC_ADDRESS *DestAddr OPTIONAL,
- IN UINT16 *Protocol OPTIONAL
- )
- {
- EMU_SNP_PRIVATE *Private;
- ETHERNET_HEADER *EnetHeader;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- if (Private->Mode->State < EfiSimpleNetworkStarted) {
- return EFI_NOT_STARTED;
- }
- if ( HeaderSize != 0 ) {
- if ((DestAddr == NULL) || (Protocol == NULL) || (HeaderSize != Private->Mode->MediaHeaderSize)) {
- return EFI_INVALID_PARAMETER;
- }
- if (SrcAddr == NULL) {
- SrcAddr = &Private->Mode->CurrentAddress;
- }
- EnetHeader = (ETHERNET_HEADER *)Buffer;
- CopyMem (EnetHeader->DstAddr, DestAddr, NET_ETHER_ADDR_LEN);
- CopyMem (EnetHeader->SrcAddr, SrcAddr, NET_ETHER_ADDR_LEN);
- EnetHeader->Type = HTONS (*Protocol);
- }
- if (write (Private->BpfFd, Buffer, BufferSize) < 0) {
- return EFI_DEVICE_ERROR;
- }
- return EFI_SUCCESS;
- }
- /**
- Receives a packet from a network interface.
- @param This The protocol instance pointer.
- @param HeaderSize The size, in bytes, of the media header received on the network
- interface. If this parameter is NULL, then the media header size
- will not be returned.
- @param BufferSize On entry, the size, in bytes, of Buffer. On exit, the size, in
- bytes, of the packet that was received on the network interface.
- @param Buffer A pointer to the data buffer to receive both the media header and
- the data.
- @param SrcAddr The source HW MAC address. If this parameter is NULL, the
- HW MAC source address will not be extracted from the media
- header.
- @param DestAddr The destination HW MAC address. If this parameter is NULL,
- the HW MAC destination address will not be extracted from the
- media header.
- @param Protocol The media header type. If this parameter is NULL, then the
- protocol will not be extracted from the media header. See
- RFC 1700 section "Ether Types" for examples.
- @retval EFI_SUCCESS The received data was stored in Buffer, and BufferSize has
- been updated to the number of bytes received.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_NOT_READY The network interface is too busy to accept this transmit
- request.
- @retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
- @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
- @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
- @retval EFI_UNSUPPORTED This function is not supported by the network interface.
- **/
- EFI_STATUS
- EmuSnpReceive (
- IN EMU_SNP_PROTOCOL *This,
- OUT UINTN *HeaderSize OPTIONAL,
- IN OUT UINTN *BufferSize,
- OUT VOID *Buffer,
- OUT EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
- OUT EFI_MAC_ADDRESS *DestAddr OPTIONAL,
- OUT UINT16 *Protocol OPTIONAL
- )
- {
- EMU_SNP_PRIVATE *Private;
- struct bpf_hdr *BpfHeader;
- struct bpf_stat BpfStats;
- ETHERNET_HEADER *EnetHeader;
- ssize_t Result;
- Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
- if (Private->Mode->State < EfiSimpleNetworkStarted) {
- return EFI_NOT_STARTED;
- }
- ZeroMem (&BpfStats, sizeof (BpfStats));
- if (ioctl (Private->BpfFd, BIOCGSTATS, &BpfStats) == 0) {
- Private->ReceivedPackets += BpfStats.bs_recv;
- if (BpfStats.bs_drop > Private->DroppedPackets) {
- printf (
- "SNP: STATS: RCVD = %d DROPPED = %d. Probably need to increase BPF PcdNetworkPacketFilterSize?\n",
- BpfStats.bs_recv,
- BpfStats.bs_drop - Private->DroppedPackets
- );
- Private->DroppedPackets = BpfStats.bs_drop;
- }
- }
- //
- // Do we have any remaining packets from the previous read?
- //
- if (Private->CurrentReadPointer >= Private->EndReadPointer) {
- Result = read (Private->BpfFd, Private->ReadBuffer, Private->ReadBufferSize);
- if (Result < 0) {
- // EAGAIN means that there's no I/O outstanding against this file descriptor.
- return (errno == EAGAIN) ? EFI_NOT_READY : EFI_DEVICE_ERROR;
- }
- if (Result == 0) {
- return EFI_NOT_READY;
- }
- Private->CurrentReadPointer = Private->ReadBuffer;
- Private->EndReadPointer = Private->CurrentReadPointer + Result;
- }
- BpfHeader = Private->CurrentReadPointer;
- EnetHeader = Private->CurrentReadPointer + BpfHeader->bh_hdrlen;
- if (BpfHeader->bh_caplen > *BufferSize) {
- *BufferSize = BpfHeader->bh_caplen;
- return EFI_BUFFER_TOO_SMALL;
- }
- CopyMem (Buffer, EnetHeader, BpfHeader->bh_caplen);
- *BufferSize = BpfHeader->bh_caplen;
- if (HeaderSize != NULL) {
- *HeaderSize = sizeof (ETHERNET_HEADER);
- }
- if (DestAddr != NULL) {
- ZeroMem (DestAddr, sizeof (EFI_MAC_ADDRESS));
- CopyMem (DestAddr, EnetHeader->DstAddr, NET_ETHER_ADDR_LEN);
- }
- if (SrcAddr != NULL) {
- ZeroMem (SrcAddr, sizeof (EFI_MAC_ADDRESS));
- CopyMem (SrcAddr, EnetHeader->SrcAddr, NET_ETHER_ADDR_LEN);
- }
- if (Protocol != NULL) {
- *Protocol = NTOHS (EnetHeader->Type);
- }
- Private->CurrentReadPointer += BPF_WORDALIGN (BpfHeader->bh_hdrlen + BpfHeader->bh_caplen);
- return EFI_SUCCESS;
- }
- EMU_SNP_PROTOCOL gEmuSnpProtocol = {
- GasketSnpCreateMapping,
- GasketSnpStart,
- GasketSnpStop,
- GasketSnpInitialize,
- GasketSnpReset,
- GasketSnpShutdown,
- GasketSnpReceiveFilters,
- GasketSnpStationAddress,
- GasketSnpStatistics,
- GasketSnpMCastIpToMac,
- GasketSnpNvData,
- GasketSnpGetStatus,
- GasketSnpTransmit,
- GasketSnpReceive
- };
- EFI_STATUS
- GetInterfaceMacAddr (
- EMU_SNP_PRIVATE *Private
- )
- {
- EFI_STATUS Status;
- struct ifaddrs *IfAddrs;
- struct ifaddrs *If;
- struct sockaddr_dl *IfSdl;
- if (getifaddrs (&IfAddrs) != 0) {
- return EFI_UNSUPPORTED;
- }
- //
- // Convert the interface name to ASCII so we can find it.
- //
- Private->InterfaceName = malloc (StrSize (Private->Thunk->ConfigString));
- if (Private->InterfaceName == NULL) {
- Status = EFI_OUT_OF_RESOURCES;
- goto Exit;
- }
- UnicodeStrToAsciiStrS (
- Private->Thunk->ConfigString,
- Private->InterfaceName,
- StrSize (Private->Thunk->ConfigString)
- );
- Status = EFI_NOT_FOUND;
- If = IfAddrs;
- while (If != NULL) {
- IfSdl = (struct sockaddr_dl *)If->ifa_addr;
- if (IfSdl->sdl_family == AF_LINK) {
- if (!AsciiStrCmp (Private->InterfaceName, If->ifa_name)) {
- CopyMem (&Private->MacAddress, LLADDR (IfSdl), NET_ETHER_ADDR_LEN);
- Status = EFI_SUCCESS;
- break;
- }
- }
- If = If->ifa_next;
- }
- Exit:
- freeifaddrs (IfAddrs);
- return Status;
- }
- EFI_STATUS
- EmuSnpThunkOpen (
- IN EMU_IO_THUNK_PROTOCOL *This
- )
- {
- EMU_SNP_PRIVATE *Private;
- if (This->Private != NULL) {
- return EFI_ALREADY_STARTED;
- }
- if (!CompareGuid (This->Protocol, &gEmuSnpProtocolGuid)) {
- return EFI_UNSUPPORTED;
- }
- Private = malloc (sizeof (EMU_SNP_PRIVATE));
- if (Private == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- Private->Signature = EMU_SNP_PRIVATE_SIGNATURE;
- Private->Thunk = This;
- CopyMem (&Private->EmuSnp, &gEmuSnpProtocol, sizeof (gEmuSnpProtocol));
- GetInterfaceMacAddr (Private);
- This->Interface = &Private->EmuSnp;
- This->Private = Private;
- return EFI_SUCCESS;
- }
- EFI_STATUS
- EmuSnpThunkClose (
- IN EMU_IO_THUNK_PROTOCOL *This
- )
- {
- EMU_SNP_PRIVATE *Private;
- if (!CompareGuid (This->Protocol, &gEmuSnpProtocolGuid)) {
- return EFI_UNSUPPORTED;
- }
- Private = This->Private;
- free (Private);
- return EFI_SUCCESS;
- }
- EMU_IO_THUNK_PROTOCOL gSnpThunkIo = {
- &gEmuSnpProtocolGuid,
- NULL,
- NULL,
- 0,
- GasketSnpThunkOpen,
- GasketSnpThunkClose,
- NULL
- };
- #endif
|