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772db4bb | 1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2006 - 2007, Intel Corporation\r | |
4 | All rights reserved. This program and the accompanying materials\r | |
5 | are licensed and made available under the terms and conditions of the BSD License\r | |
6 | which accompanies this distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | Mtftp4Support.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | Support routines for Mtftp\r | |
19 | \r | |
20 | \r | |
21 | **/\r | |
22 | \r | |
23 | #include "Mtftp4Impl.h"\r | |
24 | \r | |
25 | \r | |
26 | /**\r | |
27 | Allocate a MTFTP4 block range, then init it to the\r | |
28 | range of [Start, End]\r | |
29 | \r | |
30 | @param Start The start block number\r | |
31 | @param End The last block number in the range\r | |
32 | \r | |
33 | @return NULL if failed to allocate memory, otherwise the created block range.\r | |
34 | \r | |
35 | **/\r | |
36 | STATIC\r | |
37 | MTFTP4_BLOCK_RANGE *\r | |
38 | Mtftp4AllocateRange (\r | |
39 | IN UINT16 Start,\r | |
40 | IN UINT16 End\r | |
41 | )\r | |
42 | {\r | |
43 | MTFTP4_BLOCK_RANGE *Range;\r | |
44 | \r | |
e48e37fc | 45 | Range = AllocatePool (sizeof (MTFTP4_BLOCK_RANGE));\r |
772db4bb | 46 | \r |
47 | if (Range == NULL) {\r | |
48 | return NULL;\r | |
49 | }\r | |
50 | \r | |
e48e37fc | 51 | InitializeListHead (&Range->Link);\r |
772db4bb | 52 | Range->Start = Start;\r |
53 | Range->End = End;\r | |
54 | \r | |
55 | return Range;\r | |
56 | }\r | |
57 | \r | |
58 | \r | |
59 | /**\r | |
60 | Initialize the block range for either RRQ or WRQ. RRQ and WRQ have\r | |
61 | different requirements for Start and End. For example, during start\r | |
62 | up, WRQ initializes its whole valid block range to [0, 0xffff]. This\r | |
63 | is bacause the server will send us a ACK0 to inform us to start the\r | |
64 | upload. When the client received ACK0, it will remove 0 from the range,\r | |
65 | get the next block number, which is 1, then upload the BLOCK1. For RRQ\r | |
66 | without option negotiation, the server will directly send us the BLOCK1\r | |
67 | in response to the client's RRQ. When received BLOCK1, the client will\r | |
68 | remove it from the block range and send an ACK. It also works if there\r | |
69 | is option negotiation.\r | |
70 | \r | |
71 | @param Head The block range head to initialize\r | |
72 | @param Start The Start block number.\r | |
73 | @param End The last block number.\r | |
74 | \r | |
75 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory for initial block range\r | |
76 | @retval EFI_SUCCESS The initial block range is created.\r | |
77 | \r | |
78 | **/\r | |
79 | EFI_STATUS\r | |
80 | Mtftp4InitBlockRange (\r | |
e48e37fc | 81 | IN LIST_ENTRY *Head,\r |
772db4bb | 82 | IN UINT16 Start,\r |
83 | IN UINT16 End\r | |
84 | )\r | |
85 | {\r | |
86 | MTFTP4_BLOCK_RANGE *Range;\r | |
87 | \r | |
88 | Range = Mtftp4AllocateRange (Start, End);\r | |
89 | \r | |
90 | if (Range == NULL) {\r | |
91 | return EFI_OUT_OF_RESOURCES;\r | |
92 | }\r | |
93 | \r | |
e48e37fc | 94 | InsertTailList (Head, &Range->Link);\r |
772db4bb | 95 | return EFI_SUCCESS;\r |
96 | }\r | |
97 | \r | |
98 | \r | |
99 | /**\r | |
100 | Get the first valid block number on the range list.\r | |
101 | \r | |
102 | @param Head The block range head\r | |
103 | \r | |
104 | @return -1: if the block range is empty. Otherwise the first valid block number.\r | |
105 | \r | |
106 | **/\r | |
107 | INTN\r | |
108 | Mtftp4GetNextBlockNum (\r | |
e48e37fc | 109 | IN LIST_ENTRY *Head\r |
772db4bb | 110 | )\r |
111 | {\r | |
112 | MTFTP4_BLOCK_RANGE *Range;\r | |
113 | \r | |
e48e37fc | 114 | if (IsListEmpty (Head)) {\r |
772db4bb | 115 | return -1;\r |
116 | }\r | |
117 | \r | |
118 | Range = NET_LIST_HEAD (Head, MTFTP4_BLOCK_RANGE, Link);\r | |
119 | return Range->Start;\r | |
120 | }\r | |
121 | \r | |
122 | \r | |
123 | /**\r | |
124 | Set the last block number of the block range list. It will\r | |
125 | remove all the blocks after the Last. MTFTP initialize the\r | |
126 | block range to the maximum possible range, such as [0, 0xffff]\r | |
127 | for WRQ. When it gets the last block number, it will call\r | |
128 | this function to set the last block number.\r | |
129 | \r | |
130 | @param Head The block range list\r | |
131 | @param Last The last block number\r | |
132 | \r | |
133 | @return None\r | |
134 | \r | |
135 | **/\r | |
136 | VOID\r | |
137 | Mtftp4SetLastBlockNum (\r | |
e48e37fc | 138 | IN LIST_ENTRY *Head,\r |
772db4bb | 139 | IN UINT16 Last\r |
140 | )\r | |
141 | {\r | |
142 | MTFTP4_BLOCK_RANGE *Range;\r | |
143 | \r | |
144 | //\r | |
145 | // Iterate from the tail to head to remove the block number\r | |
146 | // after the last.\r | |
147 | //\r | |
e48e37fc | 148 | while (!IsListEmpty (Head)) {\r |
772db4bb | 149 | Range = NET_LIST_TAIL (Head, MTFTP4_BLOCK_RANGE, Link);\r |
150 | \r | |
151 | if (Range->Start > Last) {\r | |
e48e37fc | 152 | RemoveEntryList (&Range->Link);\r |
153 | gBS->FreePool (Range);\r | |
772db4bb | 154 | continue;\r |
155 | }\r | |
156 | \r | |
157 | if (Range->End > Last) {\r | |
158 | Range->End = Last;\r | |
159 | }\r | |
160 | \r | |
161 | return ;\r | |
162 | }\r | |
163 | }\r | |
164 | \r | |
165 | \r | |
166 | /**\r | |
167 | Remove the block number from the block range list.\r | |
168 | \r | |
169 | @param Head The block range list to remove from\r | |
170 | @param Num The block number to remove\r | |
171 | \r | |
172 | @retval EFI_NOT_FOUND The block number isn't in the block range list\r | |
173 | @retval EFI_SUCCESS The block number has been removed from the list\r | |
174 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource\r | |
175 | \r | |
176 | **/\r | |
177 | EFI_STATUS\r | |
178 | Mtftp4RemoveBlockNum (\r | |
e48e37fc | 179 | IN LIST_ENTRY *Head,\r |
772db4bb | 180 | IN UINT16 Num\r |
181 | )\r | |
182 | {\r | |
183 | MTFTP4_BLOCK_RANGE *Range;\r | |
184 | MTFTP4_BLOCK_RANGE *NewRange;\r | |
e48e37fc | 185 | LIST_ENTRY *Entry;\r |
772db4bb | 186 | \r |
187 | NET_LIST_FOR_EACH (Entry, Head) {\r | |
188 | \r | |
189 | //\r | |
190 | // Each block represents a hole [Start, End] in the file,\r | |
191 | // skip to the first range with End >= Num\r | |
192 | //\r | |
193 | Range = NET_LIST_USER_STRUCT (Entry, MTFTP4_BLOCK_RANGE, Link);\r | |
194 | \r | |
195 | if (Range->End < Num) {\r | |
196 | continue;\r | |
197 | }\r | |
198 | \r | |
199 | //\r | |
200 | // There are three different cases for Start\r | |
201 | // 1. (Start > Num) && (End >= Num):\r | |
202 | // because all the holes before this one has the condition of\r | |
203 | // End < Num, so this block number has been removed.\r | |
204 | //\r | |
205 | // 2. (Start == Num) && (End >= Num):\r | |
206 | // Need to increase the Start by one, and if End == Num, this\r | |
207 | // hole has been removed completely, remove it.\r | |
208 | //\r | |
209 | // 3. (Start < Num) && (End >= Num):\r | |
210 | // if End == Num, only need to decrease the End by one because\r | |
211 | // we have (Start < Num) && (Num == End), so (Start <= End - 1).\r | |
212 | // if (End > Num), the hold is splited into two holes, with\r | |
213 | // [Start, Num - 1] and [Num + 1, End].\r | |
214 | //\r | |
215 | if (Range->Start > Num) {\r | |
216 | return EFI_NOT_FOUND;\r | |
217 | \r | |
218 | } else if (Range->Start == Num) {\r | |
219 | Range->Start++;\r | |
220 | \r | |
221 | if (Range->Start > Range->End) {\r | |
e48e37fc | 222 | RemoveEntryList (&Range->Link);\r |
223 | gBS->FreePool (Range);\r | |
772db4bb | 224 | }\r |
225 | \r | |
226 | return EFI_SUCCESS;\r | |
227 | \r | |
228 | } else {\r | |
229 | if (Range->End == Num) {\r | |
230 | Range->End--;\r | |
231 | } else {\r | |
687a2e5f | 232 | NewRange = Mtftp4AllocateRange ((UINT16) (Num + 1), (UINT16) Range->End);\r |
772db4bb | 233 | \r |
234 | if (NewRange == NULL) {\r | |
235 | return EFI_OUT_OF_RESOURCES;\r | |
236 | }\r | |
237 | \r | |
238 | Range->End = Num - 1;\r | |
239 | NetListInsertAfter (&Range->Link, &NewRange->Link);\r | |
240 | }\r | |
241 | \r | |
242 | return EFI_SUCCESS;\r | |
243 | }\r | |
244 | }\r | |
245 | \r | |
246 | return EFI_NOT_FOUND;\r | |
247 | }\r | |
248 | \r | |
249 | \r | |
250 | /**\r | |
251 | Build then transmit the request packet for the MTFTP session.\r | |
252 | \r | |
253 | @param Instance The Mtftp session\r | |
254 | \r | |
255 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory for the request\r | |
256 | @retval EFI_SUCCESS The request is built and sent\r | |
257 | @retval Others Failed to transmit the packet.\r | |
258 | \r | |
259 | **/\r | |
260 | EFI_STATUS\r | |
261 | Mtftp4SendRequest (\r | |
262 | IN MTFTP4_PROTOCOL *Instance\r | |
263 | )\r | |
264 | {\r | |
265 | EFI_MTFTP4_PACKET *Packet;\r | |
266 | EFI_MTFTP4_OPTION *Options;\r | |
267 | EFI_MTFTP4_TOKEN *Token;\r | |
268 | NET_BUF *Nbuf;\r | |
269 | UINT8 *Mode;\r | |
270 | UINT8 *Cur;\r | |
271 | UINT32 Len;\r | |
272 | UINTN Index;\r | |
687a2e5f | 273 | UINT32 Len1;\r |
274 | UINT32 Len2;\r | |
772db4bb | 275 | \r |
276 | Token = Instance->Token;\r | |
277 | Options = Token->OptionList;\r | |
278 | Mode = Instance->Token->ModeStr;\r | |
279 | \r | |
280 | if (Mode == NULL) {\r | |
67a58d0f | 281 | Mode = (UINT8 *) "octet";\r |
772db4bb | 282 | }\r |
283 | \r | |
284 | //\r | |
285 | // Compute the packet length\r | |
286 | //\r | |
687a2e5f | 287 | Len1 = (UINT32) AsciiStrLen ((CHAR8 *) Token->Filename);\r |
288 | Len2 = (UINT32) AsciiStrLen ((CHAR8 *) Mode);\r | |
289 | Len = (Len1 + Len2 + 4);\r | |
772db4bb | 290 | \r |
291 | for (Index = 0; Index < Token->OptionCount; Index++) {\r | |
687a2e5f | 292 | Len1 = (UINT32) AsciiStrLen ((CHAR8 *) Options[Index].OptionStr);\r |
293 | Len2 = (UINT32) AsciiStrLen ((CHAR8 *) Options[Index].ValueStr);\r | |
294 | Len += Len1 + Len2 + 2;\r | |
772db4bb | 295 | }\r |
296 | \r | |
297 | //\r | |
298 | // Allocate a packet then copy the data over\r | |
299 | //\r | |
300 | if ((Nbuf = NetbufAlloc (Len)) == NULL) {\r | |
301 | return EFI_OUT_OF_RESOURCES;\r | |
302 | }\r | |
303 | \r | |
304 | Packet = (EFI_MTFTP4_PACKET *) NetbufAllocSpace (Nbuf, Len, FALSE);\r | |
305 | Packet->OpCode = HTONS (Instance->Operation);\r | |
306 | Cur = Packet->Rrq.Filename;\r | |
687a2e5f | 307 | Cur = (UINT8 *) AsciiStrCpy ((CHAR8 *) Cur, (CHAR8 *) Token->Filename);\r |
b7d3c631 | 308 | Cur += AsciiStrLen ((CHAR8 *) Token->Filename) + 1;\r |
687a2e5f | 309 | Cur = (UINT8 *) AsciiStrCpy ((CHAR8 *) Cur, (CHAR8 *) Mode);\r |
b7d3c631 | 310 | Cur += AsciiStrLen ((CHAR8 *) Mode) + 1;\r |
772db4bb | 311 | \r |
312 | for (Index = 0; Index < Token->OptionCount; ++Index) {\r | |
b61439a7 | 313 | Cur = (UINT8 *) AsciiStrCpy ((CHAR8 *) Cur, (CHAR8 *) Options[Index].OptionStr);\r |
b7d3c631 | 314 | Cur += AsciiStrLen ((CHAR8 *) Options[Index].OptionStr) + 1;\r |
b61439a7 | 315 | \r |
316 | Cur = (UINT8 *) AsciiStrCpy ((CHAR8 *) Cur, (CHAR8 *) Options[Index].ValueStr);\r | |
b7d3c631 | 317 | Cur += AsciiStrLen ((CHAR8 *) (CHAR8 *) Options[Index].ValueStr) + 1;\r |
772db4bb | 318 | }\r |
319 | \r | |
320 | return Mtftp4SendPacket (Instance, Nbuf);\r | |
321 | }\r | |
322 | \r | |
323 | \r | |
324 | /**\r | |
325 | Build then send an error message\r | |
326 | \r | |
327 | @param Instance The MTFTP session\r | |
328 | @param ErrInfo The error code and message\r | |
329 | \r | |
330 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory for the error packet\r | |
331 | @retval EFI_SUCCESS The error packet is transmitted.\r | |
332 | @retval Others Failed to transmit the packet.\r | |
333 | \r | |
334 | **/\r | |
335 | EFI_STATUS\r | |
336 | Mtftp4SendError (\r | |
337 | IN MTFTP4_PROTOCOL *Instance,\r | |
338 | IN UINT16 ErrCode,\r | |
339 | IN UINT8* ErrInfo\r | |
340 | )\r | |
341 | {\r | |
342 | NET_BUF *Packet;\r | |
343 | EFI_MTFTP4_PACKET *TftpError;\r | |
344 | UINT32 Len;\r | |
345 | \r | |
687a2e5f | 346 | Len = (UINT32) (AsciiStrLen ((CHAR8 *) ErrInfo) + sizeof (EFI_MTFTP4_ERROR_HEADER));\r |
772db4bb | 347 | Packet = NetbufAlloc (Len);\r |
348 | \r | |
349 | if (Packet == NULL) {\r | |
350 | return EFI_OUT_OF_RESOURCES;\r | |
351 | }\r | |
352 | \r | |
353 | TftpError = (EFI_MTFTP4_PACKET *) NetbufAllocSpace (Packet, Len, FALSE);\r | |
354 | TftpError->OpCode = HTONS (EFI_MTFTP4_OPCODE_ERROR);\r | |
355 | TftpError->Error.ErrorCode = HTONS (ErrCode);\r | |
356 | \r | |
687a2e5f | 357 | AsciiStrCpy ((CHAR8 *) TftpError->Error.ErrorMessage, (CHAR8 *) ErrInfo);\r |
772db4bb | 358 | \r |
359 | return Mtftp4SendPacket (Instance, Packet);\r | |
360 | }\r | |
361 | \r | |
362 | \r | |
363 | /**\r | |
364 | The callback function called when the packet is transmitted.\r | |
365 | It simply frees the packet.\r | |
366 | \r | |
367 | @param Packet The transmitted (or failed to) packet\r | |
368 | @param Points The local and remote UDP access point\r | |
369 | @param IoStatus The result of the transmission\r | |
370 | @param Context Opaque parameter to the callback\r | |
371 | \r | |
372 | @return None\r | |
373 | \r | |
374 | **/\r | |
375 | STATIC\r | |
376 | VOID\r | |
377 | Mtftp4OnPacketSent (\r | |
378 | NET_BUF *Packet,\r | |
379 | UDP_POINTS *Points,\r | |
380 | EFI_STATUS IoStatus,\r | |
381 | VOID *Context\r | |
382 | )\r | |
383 | {\r | |
384 | NetbufFree (Packet);\r | |
385 | }\r | |
386 | \r | |
387 | \r | |
388 | /**\r | |
389 | Set the timeout for the instance. User a longer time for\r | |
390 | passive instances.\r | |
391 | \r | |
392 | @param Instance The Mtftp session to set time out\r | |
393 | \r | |
394 | @return None\r | |
395 | \r | |
396 | **/\r | |
397 | VOID\r | |
398 | Mtftp4SetTimeout (\r | |
399 | IN MTFTP4_PROTOCOL *Instance\r | |
400 | )\r | |
401 | {\r | |
402 | if (Instance->Master) {\r | |
403 | Instance->PacketToLive = Instance->Timeout;\r | |
404 | } else {\r | |
405 | Instance->PacketToLive = Instance->Timeout * 2;\r | |
406 | }\r | |
407 | }\r | |
408 | \r | |
409 | \r | |
410 | /**\r | |
411 | Send the packet for the instance. It will first save a reference to\r | |
412 | the packet for later retransmission. then determine the destination\r | |
413 | port, listen port for requests, and connected port for others. At last,\r | |
414 | send the packet out.\r | |
415 | \r | |
416 | @param Instance The Mtftp instance\r | |
417 | @param Packet The packet to send\r | |
418 | \r | |
419 | @retval EFI_SUCCESS The packet is sent out\r | |
420 | @retval Others Failed to transmit the packet.\r | |
421 | \r | |
422 | **/\r | |
423 | EFI_STATUS\r | |
424 | Mtftp4SendPacket (\r | |
425 | IN MTFTP4_PROTOCOL *Instance,\r | |
426 | IN NET_BUF *Packet\r | |
427 | )\r | |
428 | {\r | |
429 | UDP_POINTS UdpPoint;\r | |
430 | EFI_STATUS Status;\r | |
431 | UINT16 OpCode;\r | |
687a2e5f | 432 | UINT16 Value;\r |
772db4bb | 433 | \r |
434 | //\r | |
435 | // Save the packet for retransmission\r | |
436 | //\r | |
437 | if (Instance->LastPacket != NULL) {\r | |
438 | NetbufFree (Instance->LastPacket);\r | |
439 | }\r | |
440 | \r | |
441 | Instance->LastPacket = Packet;\r | |
442 | \r | |
443 | Instance->CurRetry = 0;\r | |
444 | Mtftp4SetTimeout (Instance);\r | |
445 | \r | |
446 | UdpPoint.LocalAddr = 0;\r | |
447 | UdpPoint.LocalPort = 0;\r | |
448 | UdpPoint.RemoteAddr = Instance->ServerIp;\r | |
449 | \r | |
450 | //\r | |
451 | // Send the requests to the listening port, other packets\r | |
452 | // to the connected port\r | |
453 | //\r | |
687a2e5f | 454 | Value = *((UINT16 *) NetbufGetByte (Packet, 0, NULL));\r |
455 | OpCode = NTOHS (Value);\r | |
772db4bb | 456 | \r |
457 | if ((OpCode == EFI_MTFTP4_OPCODE_RRQ) || (OpCode == EFI_MTFTP4_OPCODE_DIR) ||\r | |
458 | (OpCode == EFI_MTFTP4_OPCODE_WRQ)) {\r | |
459 | UdpPoint.RemotePort = Instance->ListeningPort;\r | |
460 | } else {\r | |
461 | UdpPoint.RemotePort = Instance->ConnectedPort;\r | |
462 | }\r | |
463 | \r | |
464 | NET_GET_REF (Packet);\r | |
465 | \r | |
466 | Status = UdpIoSendDatagram (\r | |
467 | Instance->UnicastPort,\r | |
468 | Packet,\r | |
469 | &UdpPoint,\r | |
c4a62a12 | 470 | 0,\r |
772db4bb | 471 | Mtftp4OnPacketSent,\r |
472 | Instance\r | |
473 | );\r | |
474 | \r | |
475 | if (EFI_ERROR (Status)) {\r | |
476 | NET_PUT_REF (Packet);\r | |
477 | }\r | |
478 | \r | |
479 | return Status;\r | |
480 | }\r | |
481 | \r | |
482 | \r | |
483 | /**\r | |
484 | Retransmit the last packet for the instance\r | |
485 | \r | |
486 | @param Instance The Mtftp instance\r | |
487 | \r | |
488 | @retval EFI_SUCCESS The last packet is retransmitted.\r | |
489 | @retval Others Failed to retransmit.\r | |
490 | \r | |
491 | **/\r | |
492 | EFI_STATUS\r | |
493 | Mtftp4Retransmit (\r | |
494 | IN MTFTP4_PROTOCOL *Instance\r | |
495 | )\r | |
496 | {\r | |
497 | UDP_POINTS UdpPoint;\r | |
498 | EFI_STATUS Status;\r | |
499 | UINT16 OpCode;\r | |
687a2e5f | 500 | UINT16 Value;\r |
772db4bb | 501 | \r |
502 | ASSERT (Instance->LastPacket != NULL);\r | |
503 | \r | |
504 | UdpPoint.LocalAddr = 0;\r | |
505 | UdpPoint.LocalPort = 0;\r | |
506 | UdpPoint.RemoteAddr = Instance->ServerIp;\r | |
507 | \r | |
508 | //\r | |
509 | // Set the requests to the listening port, other packets to the connected port\r | |
510 | //\r | |
687a2e5f | 511 | Value = *(UINT16 *) NetbufGetByte (Instance->LastPacket, 0, NULL);\r |
512 | OpCode = NTOHS (Value);\r | |
772db4bb | 513 | \r |
514 | if ((OpCode == EFI_MTFTP4_OPCODE_RRQ) || (OpCode == EFI_MTFTP4_OPCODE_DIR) ||\r | |
515 | (OpCode == EFI_MTFTP4_OPCODE_WRQ)) {\r | |
516 | UdpPoint.RemotePort = Instance->ListeningPort;\r | |
517 | } else {\r | |
518 | UdpPoint.RemotePort = Instance->ConnectedPort;\r | |
519 | }\r | |
520 | \r | |
521 | NET_GET_REF (Instance->LastPacket);\r | |
522 | \r | |
523 | Status = UdpIoSendDatagram (\r | |
524 | Instance->UnicastPort,\r | |
525 | Instance->LastPacket,\r | |
526 | &UdpPoint,\r | |
c4a62a12 | 527 | 0,\r |
772db4bb | 528 | Mtftp4OnPacketSent,\r |
529 | Instance\r | |
530 | );\r | |
531 | \r | |
532 | if (EFI_ERROR (Status)) {\r | |
533 | NET_PUT_REF (Instance->LastPacket);\r | |
534 | }\r | |
535 | \r | |
536 | return Status;\r | |
537 | }\r | |
538 | \r | |
539 | \r | |
540 | /**\r | |
541 | The timer ticking function for the Mtftp service instance.\r | |
542 | \r | |
543 | @param Event The ticking event\r | |
544 | @param Context The Mtftp service instance\r | |
545 | \r | |
546 | @return None\r | |
547 | \r | |
548 | **/\r | |
549 | VOID\r | |
550 | EFIAPI\r | |
551 | Mtftp4OnTimerTick (\r | |
552 | IN EFI_EVENT Event,\r | |
553 | IN VOID *Context\r | |
554 | )\r | |
555 | {\r | |
556 | MTFTP4_SERVICE *MtftpSb;\r | |
e48e37fc | 557 | LIST_ENTRY *Entry;\r |
558 | LIST_ENTRY *Next;\r | |
772db4bb | 559 | MTFTP4_PROTOCOL *Instance;\r |
560 | EFI_MTFTP4_TOKEN *Token;\r | |
561 | \r | |
562 | MtftpSb = (MTFTP4_SERVICE *) Context;\r | |
563 | \r | |
564 | //\r | |
565 | // Iterate through all the children of the Mtftp service instance. Time\r | |
566 | // out the packet. If maximum retries reached, clean the session up.\r | |
567 | //\r | |
568 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &MtftpSb->Children) {\r | |
569 | Instance = NET_LIST_USER_STRUCT (Entry, MTFTP4_PROTOCOL, Link);\r | |
570 | \r | |
571 | if ((Instance->PacketToLive == 0) || (--Instance->PacketToLive > 0)) {\r | |
572 | continue;\r | |
573 | }\r | |
574 | \r | |
575 | //\r | |
576 | // Call the user's time out handler\r | |
577 | //\r | |
578 | Token = Instance->Token;\r | |
579 | \r | |
580 | if ((Token->TimeoutCallback != NULL) &&\r | |
581 | EFI_ERROR (Token->TimeoutCallback (&Instance->Mtftp4, Token))) {\r | |
582 | \r | |
583 | Mtftp4SendError (\r | |
584 | Instance,\r | |
585 | EFI_MTFTP4_ERRORCODE_REQUEST_DENIED,\r | |
67a58d0f | 586 | (UINT8 *) "User aborted the transfer in time out"\r |
772db4bb | 587 | );\r |
588 | \r | |
589 | Mtftp4CleanOperation (Instance, EFI_ABORTED);\r | |
590 | continue;\r | |
591 | }\r | |
592 | \r | |
593 | //\r | |
594 | // Retransmit the packet if haven't reach the maxmium retry count,\r | |
595 | // otherwise exit the transfer.\r | |
596 | //\r | |
597 | if (++Instance->CurRetry < Instance->MaxRetry) {\r | |
598 | Mtftp4Retransmit (Instance);\r | |
599 | Mtftp4SetTimeout (Instance);\r | |
600 | } else {\r | |
601 | Mtftp4CleanOperation (Instance, EFI_TIMEOUT);\r | |
602 | continue;\r | |
603 | }\r | |
604 | }\r | |
605 | }\r |