1 /**@file
2 Linux Packet Filter implementation of the EMU_SNP_PROTOCOL that allows the
3 emulator to get on real networks.
4
5 Currently only the Berkeley Packet Filter is fully implemented and this file
6 is just a template that needs to get filled in.
7
8 Copyright (c) 2004 - 2009, Intel Corporation. All rights reserved.<BR>
9 Portitions copyright (c) 2011, Apple Inc. All rights reserved.
10
11 SPDX-License-Identifier: BSD-2-Clause-Patent
12
13 **/
14
15
16 #include "Host.h"
17
18 #ifndef __APPLE__
19
20 #define EMU_SNP_PRIVATE_SIGNATURE SIGNATURE_32('E', 'M', 's', 'n')
21 typedef struct {
22 UINTN Signature;
23
24 EMU_IO_THUNK_PROTOCOL *Thunk;
25
26
27 EMU_SNP_PROTOCOL EmuSnp;
28 EFI_SIMPLE_NETWORK_MODE *Mode;
29
30 } EMU_SNP_PRIVATE;
31
32 #define EMU_SNP_PRIVATE_DATA_FROM_THIS(a) \
33 CR(a, EMU_SNP_PRIVATE, EmuSnp, EMU_SNP_PRIVATE_SIGNATURE)
34
35 /**
36 Register storage for SNP Mode.
37
38 @param This Protocol instance pointer.
39 @param Mode SimpleNetworkProtocol Mode structure passed into driver.
40
41 @retval EFI_SUCCESS The network interface was started.
42 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
43
44 **/
45 EFI_STATUS
EmuSnpCreateMapping(IN EMU_SNP_PROTOCOL * This,IN EFI_SIMPLE_NETWORK_MODE * Mode)46 EmuSnpCreateMapping (
47 IN EMU_SNP_PROTOCOL *This,
48 IN EFI_SIMPLE_NETWORK_MODE *Mode
49 )
50 {
51 EMU_SNP_PRIVATE *Private;
52
53 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
54
55 Private->Mode = Mode;
56
57 return EFI_SUCCESS;
58 }
59
60 /**
61 Changes the state of a network interface from "stopped" to "started".
62
63 @param This Protocol instance pointer.
64
65 @retval EFI_SUCCESS The network interface was started.
66 @retval EFI_ALREADY_STARTED The network interface is already in the started state.
67 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
68 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
69 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
70
71 **/
72 EFI_STATUS
EmuSnpStart(IN EMU_SNP_PROTOCOL * This)73 EmuSnpStart (
74 IN EMU_SNP_PROTOCOL *This
75 )
76 {
77 EMU_SNP_PRIVATE *Private;
78
79 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
80
81 return EFI_UNSUPPORTED;
82 }
83
84 /**
85 Changes the state of a network interface from "started" to "stopped".
86
87 @param This Protocol instance pointer.
88
89 @retval EFI_SUCCESS The network interface was stopped.
90 @retval EFI_ALREADY_STARTED The network interface is already in the stopped state.
91 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
92 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
93 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
94
95 **/
96 EFI_STATUS
EmuSnpStop(IN EMU_SNP_PROTOCOL * This)97 EmuSnpStop (
98 IN EMU_SNP_PROTOCOL *This
99 )
100 {
101 EMU_SNP_PRIVATE *Private;
102
103 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
104
105 return EFI_UNSUPPORTED;
106 }
107
108 /**
109 Resets a network adapter and allocates the transmit and receive buffers
110 required by the network interface; optionally, also requests allocation
111 of additional transmit and receive buffers.
112
113 @param This The protocol instance pointer.
114 @param ExtraRxBufferSize The size, in bytes, of the extra receive buffer space
115 that the driver should allocate for the network interface.
116 Some network interfaces will not be able to use the extra
117 buffer, and the caller will not know if it is actually
118 being used.
119 @param ExtraTxBufferSize The size, in bytes, of the extra transmit buffer space
120 that the driver should allocate for the network interface.
121 Some network interfaces will not be able to use the extra
122 buffer, and the caller will not know if it is actually
123 being used.
124
125 @retval EFI_SUCCESS The network interface was initialized.
126 @retval EFI_NOT_STARTED The network interface has not been started.
127 @retval EFI_OUT_OF_RESOURCES There was not enough memory for the transmit and
128 receive buffers.
129 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
130 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
131 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
132
133 **/
134 EFI_STATUS
EmuSnpInitialize(IN EMU_SNP_PROTOCOL * This,IN UINTN ExtraRxBufferSize OPTIONAL,IN UINTN ExtraTxBufferSize OPTIONAL)135 EmuSnpInitialize (
136 IN EMU_SNP_PROTOCOL *This,
137 IN UINTN ExtraRxBufferSize OPTIONAL,
138 IN UINTN ExtraTxBufferSize OPTIONAL
139 )
140 {
141 EMU_SNP_PRIVATE *Private;
142
143 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
144
145 return EFI_UNSUPPORTED;
146 }
147
148 /**
149 Resets a network adapter and re-initializes it with the parameters that were
150 provided in the previous call to Initialize().
151
152 @param This The protocol instance pointer.
153 @param ExtendedVerification Indicates that the driver may perform a more
154 exhaustive verification operation of the device
155 during reset.
156
157 @retval EFI_SUCCESS The network interface was reset.
158 @retval EFI_NOT_STARTED The network interface has not been started.
159 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
160 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
161 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
162
163 **/
164 EFI_STATUS
EmuSnpReset(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN ExtendedVerification)165 EmuSnpReset (
166 IN EMU_SNP_PROTOCOL *This,
167 IN BOOLEAN ExtendedVerification
168 )
169 {
170 EMU_SNP_PRIVATE *Private;
171
172 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
173
174 return EFI_UNSUPPORTED;
175 }
176
177 /**
178 Resets a network adapter and leaves it in a state that is safe for
179 another driver to initialize.
180
181 @param This Protocol instance pointer.
182
183 @retval EFI_SUCCESS The network interface was shutdown.
184 @retval EFI_NOT_STARTED The network interface has not been started.
185 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
186 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
187 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
188
189 **/
190 EFI_STATUS
EmuSnpShutdown(IN EMU_SNP_PROTOCOL * This)191 EmuSnpShutdown (
192 IN EMU_SNP_PROTOCOL *This
193 )
194 {
195 EMU_SNP_PRIVATE *Private;
196
197 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
198
199 return EFI_UNSUPPORTED;
200 }
201
202 /**
203 Manages the multicast receive filters of a network interface.
204
205 @param This The protocol instance pointer.
206 @param Enable A bit mask of receive filters to enable on the network interface.
207 @param Disable A bit mask of receive filters to disable on the network interface.
208 @param ResetMCastFilter Set to TRUE to reset the contents of the multicast receive
209 filters on the network interface to their default values.
210 @param McastFilterCnt Number of multicast HW MAC addresses in the new
211 MCastFilter list. This value must be less than or equal to
212 the MCastFilterCnt field of EMU_SNP_MODE. This
213 field is optional if ResetMCastFilter is TRUE.
214 @param MCastFilter A pointer to a list of new multicast receive filter HW MAC
215 addresses. This list will replace any existing multicast
216 HW MAC address list. This field is optional if
217 ResetMCastFilter is TRUE.
218
219 @retval EFI_SUCCESS The multicast receive filter list was updated.
220 @retval EFI_NOT_STARTED The network interface has not been started.
221 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
222 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
223 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
224
225 **/
226 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)227 EmuSnpReceiveFilters (
228 IN EMU_SNP_PROTOCOL *This,
229 IN UINT32 Enable,
230 IN UINT32 Disable,
231 IN BOOLEAN ResetMCastFilter,
232 IN UINTN MCastFilterCnt OPTIONAL,
233 IN EFI_MAC_ADDRESS *MCastFilter OPTIONAL
234 )
235 {
236 EMU_SNP_PRIVATE *Private;
237
238 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
239
240 return EFI_UNSUPPORTED;
241 }
242
243 /**
244 Modifies or resets the current station address, if supported.
245
246 @param This The protocol instance pointer.
247 @param Reset Flag used to reset the station address to the network interfaces
248 permanent address.
249 @param New The new station address to be used for the network interface.
250
251 @retval EFI_SUCCESS The network interfaces station address was updated.
252 @retval EFI_NOT_STARTED The network interface has not been started.
253 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
254 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
255 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
256
257 **/
258 EFI_STATUS
EmuSnpStationAddress(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN Reset,IN EFI_MAC_ADDRESS * New OPTIONAL)259 EmuSnpStationAddress (
260 IN EMU_SNP_PROTOCOL *This,
261 IN BOOLEAN Reset,
262 IN EFI_MAC_ADDRESS *New OPTIONAL
263 )
264 {
265 EMU_SNP_PRIVATE *Private;
266
267 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
268
269 return EFI_UNSUPPORTED;
270 }
271
272 /**
273 Resets or collects the statistics on a network interface.
274
275 @param This Protocol instance pointer.
276 @param Reset Set to TRUE to reset the statistics for the network interface.
277 @param StatisticsSize On input the size, in bytes, of StatisticsTable. On
278 output the size, in bytes, of the resulting table of
279 statistics.
280 @param StatisticsTable A pointer to the EFI_NETWORK_STATISTICS structure that
281 contains the statistics.
282
283 @retval EFI_SUCCESS The statistics were collected from the network interface.
284 @retval EFI_NOT_STARTED The network interface has not been started.
285 @retval EFI_BUFFER_TOO_SMALL The Statistics buffer was too small. The current buffer
286 size needed to hold the statistics is returned in
287 StatisticsSize.
288 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
289 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
290 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
291
292 **/
293 EFI_STATUS
EmuSnpStatistics(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN Reset,IN OUT UINTN * StatisticsSize OPTIONAL,OUT EFI_NETWORK_STATISTICS * StatisticsTable OPTIONAL)294 EmuSnpStatistics (
295 IN EMU_SNP_PROTOCOL *This,
296 IN BOOLEAN Reset,
297 IN OUT UINTN *StatisticsSize OPTIONAL,
298 OUT EFI_NETWORK_STATISTICS *StatisticsTable OPTIONAL
299 )
300 {
301 EMU_SNP_PRIVATE *Private;
302
303 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
304
305 return EFI_UNSUPPORTED;
306 }
307
308 /**
309 Converts a multicast IP address to a multicast HW MAC address.
310
311 @param This The protocol instance pointer.
312 @param IPv6 Set to TRUE if the multicast IP address is IPv6 [RFC 2460]. Set
313 to FALSE if the multicast IP address is IPv4 [RFC 791].
314 @param IP The multicast IP address that is to be converted to a multicast
315 HW MAC address.
316 @param MAC The multicast HW MAC address that is to be generated from IP.
317
318 @retval EFI_SUCCESS The multicast IP address was mapped to the multicast
319 HW MAC address.
320 @retval EFI_NOT_STARTED The network interface has not been started.
321 @retval EFI_BUFFER_TOO_SMALL The Statistics buffer was too small. The current buffer
322 size needed to hold the statistics is returned in
323 StatisticsSize.
324 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
325 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
326 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
327
328 **/
329 EFI_STATUS
EmuSnpMCastIpToMac(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN IPv6,IN EFI_IP_ADDRESS * IP,OUT EFI_MAC_ADDRESS * MAC)330 EmuSnpMCastIpToMac (
331 IN EMU_SNP_PROTOCOL *This,
332 IN BOOLEAN IPv6,
333 IN EFI_IP_ADDRESS *IP,
334 OUT EFI_MAC_ADDRESS *MAC
335 )
336 {
337 EMU_SNP_PRIVATE *Private;
338
339 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
340
341 return EFI_UNSUPPORTED;
342 }
343
344 /**
345 Performs read and write operations on the NVRAM device attached to a
346 network interface.
347
348 @param This The protocol instance pointer.
349 @param ReadWrite TRUE for read operations, FALSE for write operations.
350 @param Offset Byte offset in the NVRAM device at which to start the read or
351 write operation. This must be a multiple of NvRamAccessSize and
352 less than NvRamSize.
353 @param BufferSize The number of bytes to read or write from the NVRAM device.
354 This must also be a multiple of NvramAccessSize.
355 @param Buffer A pointer to the data buffer.
356
357 @retval EFI_SUCCESS The NVRAM access was performed.
358 @retval EFI_NOT_STARTED The network interface has not been started.
359 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
360 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
361 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
362
363 **/
364 EFI_STATUS
EmuSnpNvData(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN ReadWrite,IN UINTN Offset,IN UINTN BufferSize,IN OUT VOID * Buffer)365 EmuSnpNvData (
366 IN EMU_SNP_PROTOCOL *This,
367 IN BOOLEAN ReadWrite,
368 IN UINTN Offset,
369 IN UINTN BufferSize,
370 IN OUT VOID *Buffer
371 )
372 {
373 EMU_SNP_PRIVATE *Private;
374
375 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
376
377 return EFI_UNSUPPORTED;
378 }
379
380 /**
381 Reads the current interrupt status and recycled transmit buffer status from
382 a network interface.
383
384 @param This The protocol instance pointer.
385 @param InterruptStatus A pointer to the bit mask of the currently active interrupts
386 If this is NULL, the interrupt status will not be read from
387 the device. If this is not NULL, the interrupt status will
388 be read from the device. When the interrupt status is read,
389 it will also be cleared. Clearing the transmit interrupt
390 does not empty the recycled transmit buffer array.
391 @param TxBuf Recycled transmit buffer address. The network interface will
392 not transmit if its internal recycled transmit buffer array
393 is full. Reading the transmit buffer does not clear the
394 transmit interrupt. If this is NULL, then the transmit buffer
395 status will not be read. If there are no transmit buffers to
396 recycle and TxBuf is not NULL, * TxBuf will be set to NULL.
397
398 @retval EFI_SUCCESS The status of the network interface was retrieved.
399 @retval EFI_NOT_STARTED The network interface has not been started.
400 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
401 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
402 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
403
404 **/
405 EFI_STATUS
EmuSnpGetStatus(IN EMU_SNP_PROTOCOL * This,OUT UINT32 * InterruptStatus OPTIONAL,OUT VOID ** TxBuf OPTIONAL)406 EmuSnpGetStatus (
407 IN EMU_SNP_PROTOCOL *This,
408 OUT UINT32 *InterruptStatus OPTIONAL,
409 OUT VOID **TxBuf OPTIONAL
410 )
411 {
412 EMU_SNP_PRIVATE *Private;
413
414 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
415
416 return EFI_UNSUPPORTED;
417 }
418
419 /**
420 Places a packet in the transmit queue of a network interface.
421
422 @param This The protocol instance pointer.
423 @param HeaderSize The size, in bytes, of the media header to be filled in by
424 the Transmit() function. If HeaderSize is non-zero, then it
425 must be equal to This->Mode->MediaHeaderSize and the DestAddr
426 and Protocol parameters must not be NULL.
427 @param BufferSize The size, in bytes, of the entire packet (media header and
428 data) to be transmitted through the network interface.
429 @param Buffer A pointer to the packet (media header followed by data) to be
430 transmitted. This parameter cannot be NULL. If HeaderSize is zero,
431 then the media header in Buffer must already be filled in by the
432 caller. If HeaderSize is non-zero, then the media header will be
433 filled in by the Transmit() function.
434 @param SrcAddr The source HW MAC address. If HeaderSize is zero, then this parameter
435 is ignored. If HeaderSize is non-zero and SrcAddr is NULL, then
436 This->Mode->CurrentAddress is used for the source HW MAC address.
437 @param DestAddr The destination HW MAC address. If HeaderSize is zero, then this
438 parameter is ignored.
439 @param Protocol The type of header to build. If HeaderSize is zero, then this
440 parameter is ignored. See RFC 1700, section "Ether Types", for
441 examples.
442
443 @retval EFI_SUCCESS The packet was placed on the transmit queue.
444 @retval EFI_NOT_STARTED The network interface has not been started.
445 @retval EFI_NOT_READY The network interface is too busy to accept this transmit request.
446 @retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
447 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
448 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
449 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
450
451 **/
452 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)453 EmuSnpTransmit (
454 IN EMU_SNP_PROTOCOL *This,
455 IN UINTN HeaderSize,
456 IN UINTN BufferSize,
457 IN VOID *Buffer,
458 IN EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
459 IN EFI_MAC_ADDRESS *DestAddr OPTIONAL,
460 IN UINT16 *Protocol OPTIONAL
461 )
462 {
463 EMU_SNP_PRIVATE *Private;
464
465 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
466
467 return EFI_UNSUPPORTED;
468 }
469
470 /**
471 Receives a packet from a network interface.
472
473 @param This The protocol instance pointer.
474 @param HeaderSize The size, in bytes, of the media header received on the network
475 interface. If this parameter is NULL, then the media header size
476 will not be returned.
477 @param BufferSize On entry, the size, in bytes, of Buffer. On exit, the size, in
478 bytes, of the packet that was received on the network interface.
479 @param Buffer A pointer to the data buffer to receive both the media header and
480 the data.
481 @param SrcAddr The source HW MAC address. If this parameter is NULL, the
482 HW MAC source address will not be extracted from the media
483 header.
484 @param DestAddr The destination HW MAC address. If this parameter is NULL,
485 the HW MAC destination address will not be extracted from the
486 media header.
487 @param Protocol The media header type. If this parameter is NULL, then the
488 protocol will not be extracted from the media header. See
489 RFC 1700 section "Ether Types" for examples.
490
491 @retval EFI_SUCCESS The received data was stored in Buffer, and BufferSize has
492 been updated to the number of bytes received.
493 @retval EFI_NOT_STARTED The network interface has not been started.
494 @retval EFI_NOT_READY The network interface is too busy to accept this transmit
495 request.
496 @retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
497 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
498 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
499 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
500
501 **/
502 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)503 EmuSnpReceive (
504 IN EMU_SNP_PROTOCOL *This,
505 OUT UINTN *HeaderSize OPTIONAL,
506 IN OUT UINTN *BufferSize,
507 OUT VOID *Buffer,
508 OUT EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
509 OUT EFI_MAC_ADDRESS *DestAddr OPTIONAL,
510 OUT UINT16 *Protocol OPTIONAL
511 )
512 {
513 EMU_SNP_PRIVATE *Private;
514
515 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
516
517 return EFI_UNSUPPORTED;
518 }
519
520
521 EMU_SNP_PROTOCOL gEmuSnpProtocol = {
522 GasketSnpCreateMapping,
523 GasketSnpStart,
524 GasketSnpStop,
525 GasketSnpInitialize,
526 GasketSnpReset,
527 GasketSnpShutdown,
528 GasketSnpReceiveFilters,
529 GasketSnpStationAddress,
530 GasketSnpStatistics,
531 GasketSnpMCastIpToMac,
532 GasketSnpNvData,
533 GasketSnpGetStatus,
534 GasketSnpTransmit,
535 GasketSnpReceive
536 };
537
538 EFI_STATUS
EmuSnpThunkOpen(IN EMU_IO_THUNK_PROTOCOL * This)539 EmuSnpThunkOpen (
540 IN EMU_IO_THUNK_PROTOCOL *This
541 )
542 {
543 EMU_SNP_PRIVATE *Private;
544
545 if (This->Private != NULL) {
546 return EFI_ALREADY_STARTED;
547 }
548
549 if (!CompareGuid (This->Protocol, &gEmuSnpProtocolGuid)) {
550 return EFI_UNSUPPORTED;
551 }
552
553 Private = malloc (sizeof (EMU_SNP_PRIVATE));
554 if (Private == NULL) {
555 return EFI_OUT_OF_RESOURCES;
556 }
557
558
559 Private->Signature = EMU_SNP_PRIVATE_SIGNATURE;
560 Private->Thunk = This;
561 CopyMem (&Private->EmuSnp, &gEmuSnpProtocol, sizeof (gEmuSnpProtocol));
562
563 This->Interface = &Private->EmuSnp;
564 This->Private = Private;
565 return EFI_SUCCESS;
566 }
567
568
569 EFI_STATUS
EmuSnpThunkClose(IN EMU_IO_THUNK_PROTOCOL * This)570 EmuSnpThunkClose (
571 IN EMU_IO_THUNK_PROTOCOL *This
572 )
573 {
574 EMU_SNP_PRIVATE *Private;
575
576 if (!CompareGuid (This->Protocol, &gEmuSnpProtocolGuid)) {
577 return EFI_UNSUPPORTED;
578 }
579
580 Private = This->Private;
581 free (Private);
582
583 return EFI_SUCCESS;
584 }
585
586
587
588 EMU_IO_THUNK_PROTOCOL gSnpThunkIo = {
589 &gEmuSnpProtocolGuid,
590 NULL,
591 NULL,
592 0,
593 GasketSnpThunkOpen,
594 GasketSnpThunkClose,
595 NULL
596 };
597
598 #endif
599