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772db4bb | 1 | /** @file\r |
dab714aa | 2 | Routines to process Wrq (upload).\r |
d1102dba | 3 | \r |
36c19ee6 | 4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
e5eed7d3 | 5 | This program and the accompanying materials\r |
772db4bb | 6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
dab714aa | 8 | http://opensource.org/licenses/bsd-license.php<BR>\r |
772db4bb | 9 | \r |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
772db4bb | 13 | **/\r |
14 | \r | |
15 | #include "Mtftp4Impl.h"\r | |
16 | \r | |
772db4bb | 17 | \r |
18 | \r | |
19 | /**\r | |
20 | Build then send a MTFTP data packet for the MTFTP upload session.\r | |
21 | \r | |
dab714aa | 22 | @param Instance The MTFTP upload session.\r |
23 | @param BlockNum The block number to send.\r | |
772db4bb | 24 | \r |
dab714aa | 25 | @retval EFI_OUT_OF_RESOURCES Failed to build the packet.\r |
772db4bb | 26 | @retval EFI_ABORTED The consumer of this child directs to abort the\r |
dab714aa | 27 | transmission by return an error through PacketNeeded.\r |
772db4bb | 28 | @retval EFI_SUCCESS The data is sent.\r |
29 | \r | |
30 | **/\r | |
31 | EFI_STATUS\r | |
32 | Mtftp4WrqSendBlock (\r | |
dab714aa | 33 | IN OUT MTFTP4_PROTOCOL *Instance,\r |
34 | IN UINT16 BlockNum\r | |
772db4bb | 35 | )\r |
36 | {\r | |
37 | EFI_MTFTP4_PACKET *Packet;\r | |
38 | EFI_MTFTP4_TOKEN *Token;\r | |
39 | NET_BUF *UdpPacket;\r | |
40 | EFI_STATUS Status;\r | |
41 | UINT16 DataLen;\r | |
42 | UINT8 *DataBuf;\r | |
43 | UINT64 Start;\r | |
44 | \r | |
45 | //\r | |
46 | // Allocate a buffer to hold the user data\r | |
47 | //\r | |
48 | UdpPacket = NetbufAlloc (Instance->BlkSize + MTFTP4_DATA_HEAD_LEN);\r | |
49 | \r | |
50 | if (UdpPacket == NULL) {\r | |
51 | return EFI_OUT_OF_RESOURCES;\r | |
52 | }\r | |
53 | \r | |
dab714aa | 54 | Packet = (EFI_MTFTP4_PACKET *) NetbufAllocSpace (UdpPacket, MTFTP4_DATA_HEAD_LEN, FALSE);\r |
894d038a | 55 | ASSERT (Packet != NULL);\r |
772db4bb | 56 | \r |
57 | Packet->Data.OpCode = HTONS (EFI_MTFTP4_OPCODE_DATA);\r | |
58 | Packet->Data.Block = HTONS (BlockNum);\r | |
59 | \r | |
60 | //\r | |
61 | // Read the block from either the buffer or PacketNeeded callback\r | |
62 | //\r | |
63 | Token = Instance->Token;\r | |
64 | DataLen = Instance->BlkSize;\r | |
65 | \r | |
66 | if (Token->Buffer != NULL) {\r | |
67 | Start = MultU64x32 (BlockNum - 1, Instance->BlkSize);\r | |
68 | \r | |
69 | if (Token->BufferSize < Start + Instance->BlkSize) {\r | |
70 | DataLen = (UINT16) (Token->BufferSize - Start);\r | |
71 | Instance->LastBlock = BlockNum;\r | |
72 | Mtftp4SetLastBlockNum (&Instance->Blocks, BlockNum);\r | |
73 | }\r | |
74 | \r | |
75 | if (DataLen > 0) {\r | |
76 | NetbufAllocSpace (UdpPacket, DataLen, FALSE);\r | |
e48e37fc | 77 | CopyMem (Packet->Data.Data, (UINT8 *) Token->Buffer + Start, DataLen);\r |
772db4bb | 78 | }\r |
79 | \r | |
80 | } else {\r | |
81 | //\r | |
82 | // Get data from PacketNeeded\r | |
83 | //\r | |
84 | DataBuf = NULL;\r | |
dab714aa | 85 | Status = Token->PacketNeeded (\r |
86 | &Instance->Mtftp4,\r | |
87 | Token,\r | |
88 | &DataLen,\r | |
89 | (VOID **) &DataBuf\r | |
90 | );\r | |
772db4bb | 91 | \r |
92 | if (EFI_ERROR (Status) || (DataLen > Instance->BlkSize)) {\r | |
93 | if (DataBuf != NULL) {\r | |
766c7483 | 94 | FreePool (DataBuf);\r |
772db4bb | 95 | }\r |
96 | \r | |
36c19ee6 WF |
97 | if (UdpPacket != NULL) {\r |
98 | NetbufFree (UdpPacket);\r | |
99 | }\r | |
100 | \r | |
772db4bb | 101 | Mtftp4SendError (\r |
102 | Instance,\r | |
103 | EFI_MTFTP4_ERRORCODE_REQUEST_DENIED,\r | |
67a58d0f | 104 | (UINT8 *) "User aborted the transfer"\r |
772db4bb | 105 | );\r |
106 | \r | |
107 | return EFI_ABORTED;\r | |
108 | }\r | |
109 | \r | |
110 | if (DataLen < Instance->BlkSize) {\r | |
111 | Instance->LastBlock = BlockNum;\r | |
112 | Mtftp4SetLastBlockNum (&Instance->Blocks, BlockNum);\r | |
113 | }\r | |
114 | \r | |
115 | if (DataLen > 0) {\r | |
116 | NetbufAllocSpace (UdpPacket, DataLen, FALSE);\r | |
e48e37fc | 117 | CopyMem (Packet->Data.Data, DataBuf, DataLen);\r |
766c7483 | 118 | FreePool (DataBuf);\r |
772db4bb | 119 | }\r |
120 | }\r | |
121 | \r | |
122 | return Mtftp4SendPacket (Instance, UdpPacket);\r | |
123 | }\r | |
124 | \r | |
125 | \r | |
126 | /**\r | |
d1102dba LG |
127 | Function to handle received ACK packet.\r |
128 | \r | |
129 | If the ACK number matches the expected block number, and there are more\r | |
dab714aa | 130 | data pending, send the next block. Otherwise tell the caller that we are done.\r |
772db4bb | 131 | \r |
132 | @param Instance The MTFTP upload session\r | |
133 | @param Packet The MTFTP packet received\r | |
134 | @param Len The packet length\r | |
135 | @param Completed Return whether the upload has finished.\r | |
136 | \r | |
137 | @retval EFI_SUCCESS The ACK is successfully processed.\r | |
138 | @retval EFI_TFTP_ERROR The block number loops back.\r | |
139 | @retval Others Failed to transmit the next data packet.\r | |
140 | \r | |
141 | **/\r | |
142 | EFI_STATUS\r | |
143 | Mtftp4WrqHandleAck (\r | |
dab714aa | 144 | IN MTFTP4_PROTOCOL *Instance,\r |
145 | IN EFI_MTFTP4_PACKET *Packet,\r | |
146 | IN UINT32 Len,\r | |
147 | OUT BOOLEAN *Completed\r | |
772db4bb | 148 | )\r |
149 | {\r | |
150 | UINT16 AckNum;\r | |
151 | INTN Expected;\r | |
f1f11ea2 | 152 | UINT64 TotalBlock;\r |
d1102dba | 153 | \r |
772db4bb | 154 | *Completed = FALSE;\r |
155 | AckNum = NTOHS (Packet->Ack.Block[0]);\r | |
156 | Expected = Mtftp4GetNextBlockNum (&Instance->Blocks);\r | |
157 | \r | |
158 | ASSERT (Expected >= 0);\r | |
159 | \r | |
160 | //\r | |
161 | // Get an unwanted ACK, return EFI_SUCCESS to let Mtftp4WrqInput\r | |
162 | // restart receive.\r | |
163 | //\r | |
164 | if (Expected != AckNum) {\r | |
165 | return EFI_SUCCESS;\r | |
166 | }\r | |
167 | \r | |
168 | //\r | |
169 | // Remove the acked block number, if this is the last block number,\r | |
170 | // tell the Mtftp4WrqInput to finish the transfer. This is the last\r | |
171 | // block number if the block range are empty..\r | |
172 | //\r | |
49fd66cb | 173 | Mtftp4RemoveBlockNum (&Instance->Blocks, AckNum, *Completed,&TotalBlock);\r |
772db4bb | 174 | \r |
175 | Expected = Mtftp4GetNextBlockNum (&Instance->Blocks);\r | |
176 | \r | |
177 | if (Expected < 0) {\r | |
d1102dba | 178 | \r |
772db4bb | 179 | //\r |
180 | // The block range is empty. It may either because the the last\r | |
181 | // block has been ACKed, or the sequence number just looped back,\r | |
182 | // that is, there is more than 0xffff blocks.\r | |
183 | //\r | |
184 | if (Instance->LastBlock == AckNum) {\r | |
185 | ASSERT (Instance->LastBlock >= 1);\r | |
186 | *Completed = TRUE;\r | |
187 | return EFI_SUCCESS;\r | |
188 | \r | |
189 | } else {\r | |
190 | Mtftp4SendError (\r | |
191 | Instance,\r | |
192 | EFI_MTFTP4_ERRORCODE_REQUEST_DENIED,\r | |
67a58d0f | 193 | (UINT8 *) "Block number rolls back, not supported, try blksize option"\r |
772db4bb | 194 | );\r |
195 | \r | |
196 | return EFI_TFTP_ERROR;\r | |
197 | }\r | |
198 | }\r | |
199 | \r | |
200 | return Mtftp4WrqSendBlock (Instance, (UINT16) Expected);\r | |
201 | }\r | |
202 | \r | |
203 | \r | |
204 | /**\r | |
d1102dba LG |
205 | Check whether the received OACK is valid.\r |
206 | \r | |
dab714aa | 207 | The OACK is valid only if:\r |
772db4bb | 208 | 1. It only include options requested by us\r |
209 | 2. It can only include a smaller block size\r | |
210 | 3. It can't change the proposed time out value.\r | |
dab714aa | 211 | 4. Other requirements of the individal MTFTP options as required.\r |
772db4bb | 212 | \r |
213 | @param Reply The options included in the OACK\r | |
214 | @param Request The options we requested\r | |
215 | \r | |
dab714aa | 216 | @retval TRUE The options included in OACK is valid.\r |
217 | @retval FALSE The options included in OACK is invalid.\r | |
772db4bb | 218 | \r |
219 | **/\r | |
220 | BOOLEAN\r | |
221 | Mtftp4WrqOackValid (\r | |
222 | IN MTFTP4_OPTION *Reply,\r | |
223 | IN MTFTP4_OPTION *Request\r | |
224 | )\r | |
225 | {\r | |
226 | //\r | |
227 | // It is invalid for server to return options we don't request\r | |
228 | //\r | |
dab714aa | 229 | if ((Reply->Exist & ~Request->Exist) != 0) {\r |
772db4bb | 230 | return FALSE;\r |
231 | }\r | |
232 | \r | |
233 | //\r | |
234 | // Server can only specify a smaller block size to be used and\r | |
235 | // return the timeout matches that requested.\r | |
236 | //\r | |
dab714aa | 237 | if ((((Reply->Exist & MTFTP4_BLKSIZE_EXIST) != 0) && (Reply->BlkSize > Request->BlkSize)) ||\r |
238 | (((Reply->Exist & MTFTP4_TIMEOUT_EXIST) != 0) && (Reply->Timeout != Request->Timeout))) {\r | |
772db4bb | 239 | return FALSE;\r |
240 | }\r | |
241 | \r | |
242 | return TRUE;\r | |
243 | }\r | |
244 | \r | |
245 | \r | |
246 | /**\r | |
d1102dba LG |
247 | Function to handle the MTFTP OACK packet.\r |
248 | \r | |
dab714aa | 249 | It parses the packet's options, and update the internal states of the session.\r |
772db4bb | 250 | \r |
251 | @param Instance The MTFTP session\r | |
252 | @param Packet The received OACK packet\r | |
253 | @param Len The length of the packet\r | |
254 | @param Completed Whether the transmisson has completed. NOT used by\r | |
255 | this function.\r | |
256 | \r | |
257 | @retval EFI_SUCCESS The OACK process is OK\r | |
258 | @retval EFI_TFTP_ERROR Some error occured, and the session reset.\r | |
259 | \r | |
260 | **/\r | |
261 | EFI_STATUS\r | |
262 | Mtftp4WrqHandleOack (\r | |
dab714aa | 263 | IN OUT MTFTP4_PROTOCOL *Instance,\r |
264 | IN EFI_MTFTP4_PACKET *Packet,\r | |
265 | IN UINT32 Len,\r | |
266 | OUT BOOLEAN *Completed\r | |
772db4bb | 267 | )\r |
268 | {\r | |
269 | MTFTP4_OPTION Reply;\r | |
270 | EFI_MTFTP4_PACKET Bogus;\r | |
271 | EFI_STATUS Status;\r | |
272 | INTN Expected;\r | |
273 | \r | |
274 | *Completed = FALSE;\r | |
275 | \r | |
276 | //\r | |
277 | // Ignore the OACK if already started the upload\r | |
278 | //\r | |
279 | Expected = Mtftp4GetNextBlockNum (&Instance->Blocks);\r | |
280 | \r | |
281 | if (Expected != 0) {\r | |
282 | return EFI_SUCCESS;\r | |
283 | }\r | |
284 | \r | |
285 | //\r | |
286 | // Parse and validate the options from server\r | |
287 | //\r | |
e48e37fc | 288 | ZeroMem (&Reply, sizeof (MTFTP4_OPTION));\r |
6c047cfa | 289 | Status = Mtftp4ParseOptionOack (Packet, Len, Instance->Operation, &Reply);\r |
772db4bb | 290 | \r |
291 | if (EFI_ERROR (Status) || !Mtftp4WrqOackValid (&Reply, &Instance->RequestOption)) {\r | |
292 | //\r | |
293 | // Don't send a MTFTP error packet when out of resource, it can\r | |
294 | // only make it worse.\r | |
295 | //\r | |
296 | if (Status != EFI_OUT_OF_RESOURCES) {\r | |
297 | Mtftp4SendError (\r | |
298 | Instance,\r | |
299 | EFI_MTFTP4_ERRORCODE_ILLEGAL_OPERATION,\r | |
67a58d0f | 300 | (UINT8 *) "Mal-formated OACK packet"\r |
772db4bb | 301 | );\r |
302 | }\r | |
303 | \r | |
304 | return EFI_TFTP_ERROR;\r | |
305 | }\r | |
306 | \r | |
307 | if (Reply.BlkSize != 0) {\r | |
308 | Instance->BlkSize = Reply.BlkSize;\r | |
309 | }\r | |
310 | \r | |
311 | if (Reply.Timeout != 0) {\r | |
312 | Instance->Timeout = Reply.Timeout;\r | |
313 | }\r | |
314 | \r | |
315 | //\r | |
316 | // Build a bogus ACK0 packet then pass it to the Mtftp4WrqHandleAck,\r | |
317 | // which will start the transmission of the first data block.\r | |
318 | //\r | |
319 | Bogus.Ack.OpCode = HTONS (EFI_MTFTP4_OPCODE_ACK);\r | |
320 | Bogus.Ack.Block[0] = 0;\r | |
321 | \r | |
dab714aa | 322 | Status = Mtftp4WrqHandleAck (\r |
323 | Instance,\r | |
324 | &Bogus,\r | |
325 | sizeof (EFI_MTFTP4_ACK_HEADER),\r | |
326 | Completed\r | |
327 | );\r | |
328 | \r | |
329 | return Status;\r | |
772db4bb | 330 | }\r |
331 | \r | |
332 | \r | |
333 | /**\r | |
334 | The input process routine for MTFTP upload.\r | |
335 | \r | |
336 | @param UdpPacket The received MTFTP packet.\r | |
b45b45b2 | 337 | @param EndPoint The local/remote access point\r |
772db4bb | 338 | @param IoStatus The result of the packet receiving\r |
339 | @param Context Opaque parameter for the callback, which is the\r | |
340 | MTFTP session.\r | |
772db4bb | 341 | **/\r |
342 | VOID\r | |
e798cd87 | 343 | EFIAPI\r |
772db4bb | 344 | Mtftp4WrqInput (\r |
345 | IN NET_BUF *UdpPacket,\r | |
b45b45b2 | 346 | IN UDP_END_POINT *EndPoint,\r |
772db4bb | 347 | IN EFI_STATUS IoStatus,\r |
348 | IN VOID *Context\r | |
349 | )\r | |
350 | {\r | |
351 | MTFTP4_PROTOCOL *Instance;\r | |
352 | EFI_MTFTP4_PACKET *Packet;\r | |
353 | BOOLEAN Completed;\r | |
354 | EFI_STATUS Status;\r | |
355 | UINT32 Len;\r | |
356 | UINT16 Opcode;\r | |
357 | \r | |
358 | Instance = (MTFTP4_PROTOCOL *) Context;\r | |
359 | NET_CHECK_SIGNATURE (Instance, MTFTP4_PROTOCOL_SIGNATURE);\r | |
360 | \r | |
361 | Completed = FALSE;\r | |
362 | Packet = NULL;\r | |
363 | Status = EFI_SUCCESS;\r | |
364 | \r | |
365 | if (EFI_ERROR (IoStatus)) {\r | |
366 | Status = IoStatus;\r | |
367 | goto ON_EXIT;\r | |
368 | }\r | |
369 | \r | |
370 | ASSERT (UdpPacket != NULL);\r | |
371 | \r | |
372 | if (UdpPacket->TotalSize < MTFTP4_OPCODE_LEN) {\r | |
373 | goto ON_EXIT;\r | |
374 | }\r | |
375 | \r | |
376 | //\r | |
377 | // Client send initial request to server's listening port. Server\r | |
378 | // will select a UDP port to communicate with the client.\r | |
379 | //\r | |
b45b45b2 | 380 | if (EndPoint->RemotePort != Instance->ConnectedPort) {\r |
772db4bb | 381 | if (Instance->ConnectedPort != 0) {\r |
382 | goto ON_EXIT;\r | |
383 | } else {\r | |
b45b45b2 | 384 | Instance->ConnectedPort = EndPoint->RemotePort;\r |
772db4bb | 385 | }\r |
386 | }\r | |
387 | \r | |
388 | //\r | |
389 | // Copy the MTFTP packet to a continuous buffer if it isn't already so.\r | |
390 | //\r | |
391 | Len = UdpPacket->TotalSize;\r | |
392 | \r | |
393 | if (UdpPacket->BlockOpNum > 1) {\r | |
e48e37fc | 394 | Packet = AllocatePool (Len);\r |
772db4bb | 395 | \r |
396 | if (Packet == NULL) {\r | |
397 | Status = EFI_OUT_OF_RESOURCES;\r | |
398 | goto ON_EXIT;\r | |
399 | }\r | |
400 | \r | |
401 | NetbufCopy (UdpPacket, 0, Len, (UINT8 *) Packet);\r | |
402 | \r | |
403 | } else {\r | |
404 | Packet = (EFI_MTFTP4_PACKET *) NetbufGetByte (UdpPacket, 0, NULL);\r | |
523f48e7 | 405 | ASSERT (Packet != NULL);\r |
772db4bb | 406 | }\r |
407 | \r | |
408 | Opcode = NTOHS (Packet->OpCode);\r | |
409 | \r | |
410 | //\r | |
411 | // Call the user's CheckPacket if provided. Abort the transmission\r | |
412 | // if CheckPacket returns an EFI_ERROR code.\r | |
413 | //\r | |
414 | if ((Instance->Token->CheckPacket != NULL) &&\r | |
415 | ((Opcode == EFI_MTFTP4_OPCODE_OACK) || (Opcode == EFI_MTFTP4_OPCODE_ERROR))) {\r | |
416 | \r | |
417 | Status = Instance->Token->CheckPacket (\r | |
418 | &Instance->Mtftp4,\r | |
419 | Instance->Token,\r | |
420 | (UINT16) Len,\r | |
421 | Packet\r | |
422 | );\r | |
423 | \r | |
424 | if (EFI_ERROR (Status)) {\r | |
425 | //\r | |
426 | // Send an error message to the server to inform it\r | |
427 | //\r | |
428 | if (Opcode != EFI_MTFTP4_OPCODE_ERROR) {\r | |
429 | Mtftp4SendError (\r | |
430 | Instance,\r | |
431 | EFI_MTFTP4_ERRORCODE_REQUEST_DENIED,\r | |
67a58d0f | 432 | (UINT8 *) "User aborted the transfer"\r |
772db4bb | 433 | );\r |
434 | }\r | |
435 | \r | |
436 | Status = EFI_ABORTED;\r | |
437 | goto ON_EXIT;\r | |
438 | }\r | |
439 | }\r | |
440 | \r | |
441 | switch (Opcode) {\r | |
442 | case EFI_MTFTP4_OPCODE_ACK:\r | |
443 | if (Len != MTFTP4_OPCODE_LEN + MTFTP4_BLKNO_LEN) {\r | |
444 | goto ON_EXIT;\r | |
445 | }\r | |
446 | \r | |
447 | Status = Mtftp4WrqHandleAck (Instance, Packet, Len, &Completed);\r | |
448 | break;\r | |
449 | \r | |
450 | case EFI_MTFTP4_OPCODE_OACK:\r | |
451 | if (Len <= MTFTP4_OPCODE_LEN) {\r | |
452 | goto ON_EXIT;\r | |
453 | }\r | |
454 | \r | |
455 | Status = Mtftp4WrqHandleOack (Instance, Packet, Len, &Completed);\r | |
456 | break;\r | |
457 | \r | |
458 | case EFI_MTFTP4_OPCODE_ERROR:\r | |
459 | Status = EFI_TFTP_ERROR;\r | |
460 | break;\r | |
d1102dba | 461 | \r |
dab714aa | 462 | default:\r |
463 | break;\r | |
772db4bb | 464 | }\r |
465 | \r | |
466 | ON_EXIT:\r | |
467 | //\r | |
468 | // Free the resources, then if !EFI_ERROR (Status) and not completed,\r | |
469 | // restart the receive, otherwise end the session.\r | |
470 | //\r | |
471 | if ((Packet != NULL) && (UdpPacket->BlockOpNum > 1)) {\r | |
766c7483 | 472 | FreePool (Packet);\r |
772db4bb | 473 | }\r |
474 | \r | |
475 | if (UdpPacket != NULL) {\r | |
476 | NetbufFree (UdpPacket);\r | |
477 | }\r | |
478 | \r | |
479 | if (!EFI_ERROR (Status) && !Completed) {\r | |
480 | Status = UdpIoRecvDatagram (Instance->UnicastPort, Mtftp4WrqInput, Instance, 0);\r | |
481 | }\r | |
482 | \r | |
483 | //\r | |
484 | // Status may have been updated by UdpIoRecvDatagram\r | |
485 | //\r | |
486 | if (EFI_ERROR (Status) || Completed) {\r | |
487 | Mtftp4CleanOperation (Instance, Status);\r | |
488 | }\r | |
489 | }\r | |
dab714aa | 490 | \r |
491 | \r | |
492 | \r | |
493 | /**\r | |
494 | Start the MTFTP session for upload.\r | |
d1102dba LG |
495 | \r |
496 | It will first init some states, then send the WRQ request packet,\r | |
dab714aa | 497 | and start receiving the packet.\r |
498 | \r | |
499 | @param Instance The MTFTP session\r | |
500 | @param Operation Redundant parameter, which is always\r | |
501 | EFI_MTFTP4_OPCODE_WRQ here.\r | |
502 | \r | |
503 | @retval EFI_SUCCESS The upload process has been started.\r | |
504 | @retval Others Failed to start the upload.\r | |
505 | \r | |
506 | **/\r | |
507 | EFI_STATUS\r | |
508 | Mtftp4WrqStart (\r | |
509 | IN MTFTP4_PROTOCOL *Instance,\r | |
510 | IN UINT16 Operation\r | |
511 | )\r | |
512 | {\r | |
513 | EFI_STATUS Status;\r | |
514 | \r | |
515 | //\r | |
516 | // The valid block number range are [0, 0xffff]. For example:\r | |
517 | // the client sends an WRQ request to the server, the server\r | |
518 | // ACK with an ACK0 to let client start transfer the first\r | |
519 | // packet.\r | |
520 | //\r | |
521 | Status = Mtftp4InitBlockRange (&Instance->Blocks, 0, 0xffff);\r | |
522 | \r | |
523 | if (EFI_ERROR (Status)) {\r | |
524 | return Status;\r | |
525 | }\r | |
526 | \r | |
527 | Status = Mtftp4SendRequest (Instance);\r | |
528 | \r | |
529 | if (EFI_ERROR (Status)) {\r | |
530 | return Status;\r | |
531 | }\r | |
532 | \r | |
533 | return UdpIoRecvDatagram (Instance->UnicastPort, Mtftp4WrqInput, Instance, 0);\r | |
534 | }\r | |
535 | \r |