]>
Commit | Line | Data |
---|---|---|
1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2006, 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 | pxe_bc_arp.c\r | |
14 | \r | |
15 | Abstract:\r | |
16 | \r | |
17 | --*/\r | |
18 | \r | |
19 | \r | |
20 | #include "bc.h"\r | |
21 | \r | |
22 | //\r | |
23 | // Definitions for ARP\r | |
24 | // Per RFC 826\r | |
25 | //\r | |
26 | STATIC ARP_HEADER ArpHeader;\r | |
27 | \r | |
28 | #pragma pack(1)\r | |
29 | STATIC struct {\r | |
30 | UINT8 MediaHeader[14];\r | |
31 | ARP_HEADER ArpHeader;\r | |
32 | UINT8 ArpData[64];\r | |
33 | } ArpReplyPacket;\r | |
34 | #pragma pack()\r | |
35 | \r | |
36 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
37 | VOID\r | |
38 | InitArpHeader (\r | |
39 | VOID\r | |
40 | )\r | |
41 | /*++\r | |
42 | Routine description:\r | |
43 | Initialize ARP packet header.\r | |
44 | \r | |
45 | Parameters:\r | |
46 | none\r | |
47 | \r | |
48 | Returns:\r | |
49 | none\r | |
50 | \r | |
51 | --*/\r | |
52 | {\r | |
53 | ArpHeader.HwType = HTONS (ETHERNET_ADD_SPC);\r | |
54 | ArpHeader.ProtType = HTONS (ETHER_TYPE_IP);\r | |
55 | ArpHeader.HwAddLen = ENET_HWADDLEN;\r | |
56 | ArpHeader.ProtAddLen = IPV4_PROTADDLEN;\r | |
57 | ArpHeader.OpCode = HTONS (ARP_REQUEST);\r | |
58 | \r | |
59 | CopyMem (&ArpReplyPacket.ArpHeader, &ArpHeader, sizeof (ARP_HEADER));\r | |
60 | }\r | |
61 | \r | |
62 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
63 | VOID\r | |
64 | HandleArpReceive (\r | |
65 | IN PXE_BASECODE_DEVICE *Private,\r | |
66 | IN ARP_PACKET *ArpPacketPtr,\r | |
67 | IN VOID *MediaHeader\r | |
68 | )\r | |
69 | /*++\r | |
70 | Routine description:\r | |
71 | Process ARP packet.\r | |
72 | \r | |
73 | Parameters:\r | |
74 | Private := Pointer to PxeBc interface\r | |
75 | ArpPacketPtr := Pointer to ARP packet\r | |
76 | MediaHeader := Pointer to media header.\r | |
77 | Returns:\r | |
78 | --*/\r | |
79 | {\r | |
80 | EFI_PXE_BASE_CODE_MODE *PxeBcMode;\r | |
81 | EFI_SIMPLE_NETWORK_MODE *SnpMode;\r | |
82 | EFI_MAC_ADDRESS TmpMacAddr;\r | |
83 | UINTN Index;\r | |
84 | UINT8 *SrcHwAddr;\r | |
85 | UINT8 *SrcPrAddr;\r | |
86 | UINT8 *DstHwAddr;\r | |
87 | UINT8 *DstPrAddr;\r | |
88 | UINT8 *TmpPtr;\r | |
89 | \r | |
90 | //\r | |
91 | //\r | |
92 | //\r | |
93 | PxeBcMode = Private->EfiBc.Mode;\r | |
94 | SnpMode = Private->SimpleNetwork->Mode;\r | |
95 | \r | |
96 | //\r | |
97 | // For now only ethernet addresses are supported.\r | |
98 | // This will need to be updated when other media\r | |
99 | // layers are supported by PxeBc, Snp and UNDI.\r | |
100 | //\r | |
101 | if (ArpPacketPtr->ArpHeader.HwType != HTONS (ETHERNET_ADD_SPC)) {\r | |
102 | return ;\r | |
103 | }\r | |
104 | //\r | |
105 | // For now only IP protocol addresses are supported.\r | |
106 | // This will need to be updated when other protocol\r | |
107 | // types are supported by PxeBc, Snp and UNDI.\r | |
108 | //\r | |
109 | if (ArpPacketPtr->ArpHeader.ProtType != HTONS (ETHER_TYPE_IP)) {\r | |
110 | return ;\r | |
111 | }\r | |
112 | //\r | |
113 | // For now only SNP hardware address sizes are supported.\r | |
114 | //\r | |
115 | if (ArpPacketPtr->ArpHeader.HwAddLen != SnpMode->HwAddressSize) {\r | |
116 | return ;\r | |
117 | }\r | |
118 | //\r | |
119 | // For now only PxeBc protocol address sizes are supported.\r | |
120 | //\r | |
121 | if (ArpPacketPtr->ArpHeader.ProtAddLen != Private->IpLength) {\r | |
122 | return ;\r | |
123 | }\r | |
124 | //\r | |
125 | // Ignore out of range opcodes\r | |
126 | //\r | |
127 | switch (ArpPacketPtr->ArpHeader.OpCode) {\r | |
128 | case HTONS (ARP_REPLY):\r | |
129 | case HTONS (ARP_REQUEST):\r | |
130 | break;\r | |
131 | \r | |
132 | default:\r | |
133 | return ;\r | |
134 | }\r | |
135 | //\r | |
136 | // update entry in our ARP cache if we have it\r | |
137 | //\r | |
138 | SrcHwAddr = (UINT8 *) &ArpPacketPtr->SrcHardwareAddr;\r | |
139 | SrcPrAddr = SrcHwAddr + SnpMode->HwAddressSize;\r | |
140 | \r | |
141 | for (Index = 0; Index < PxeBcMode->ArpCacheEntries; ++Index) {\r | |
142 | if (CompareMem (\r | |
143 | &PxeBcMode->ArpCache[Index].IpAddr,\r | |
144 | SrcPrAddr,\r | |
145 | Private->IpLength\r | |
146 | )) {\r | |
147 | continue;\r | |
148 | }\r | |
149 | \r | |
150 | CopyMem (\r | |
151 | &PxeBcMode->ArpCache[Index].MacAddr,\r | |
152 | SrcHwAddr,\r | |
153 | SnpMode->HwAddressSize\r | |
154 | );\r | |
155 | \r | |
156 | break;\r | |
157 | }\r | |
158 | //\r | |
159 | // Done if ARP packet was not for us.\r | |
160 | //\r | |
161 | DstHwAddr = SrcPrAddr + Private->IpLength;\r | |
162 | DstPrAddr = DstHwAddr + SnpMode->HwAddressSize;\r | |
163 | \r | |
164 | if (CompareMem (DstPrAddr, &PxeBcMode->StationIp, Private->IpLength)) {\r | |
165 | return ;\r | |
166 | //\r | |
167 | // not for us\r | |
168 | //\r | |
169 | }\r | |
170 | //\r | |
171 | // for us - if we did not update entry, add it\r | |
172 | //\r | |
173 | if (Index == PxeBcMode->ArpCacheEntries) {\r | |
174 | //\r | |
175 | // if we have a full table, get rid of oldest\r | |
176 | //\r | |
177 | if (Index == PXE_ARP_CACHE_SIZE) {\r | |
178 | Index = Private->OldestArpEntry;\r | |
179 | \r | |
180 | if (++Private->OldestArpEntry == PXE_ARP_CACHE_SIZE) {\r | |
181 | Private->OldestArpEntry = 0;\r | |
182 | }\r | |
183 | } else {\r | |
184 | ++PxeBcMode->ArpCacheEntries;\r | |
185 | }\r | |
186 | \r | |
187 | CopyMem (\r | |
188 | &PxeBcMode->ArpCache[Index].MacAddr,\r | |
189 | SrcHwAddr,\r | |
190 | SnpMode->HwAddressSize\r | |
191 | );\r | |
192 | \r | |
193 | CopyMem (\r | |
194 | &PxeBcMode->ArpCache[Index].IpAddr,\r | |
195 | SrcPrAddr,\r | |
196 | Private->IpLength\r | |
197 | );\r | |
198 | }\r | |
199 | //\r | |
200 | // if this is not a request or we don't yet have an IP, finished\r | |
201 | //\r | |
202 | if (ArpPacketPtr->ArpHeader.OpCode != HTONS (ARP_REQUEST) || !Private->GoodStationIp) {\r | |
203 | return ;\r | |
204 | }\r | |
205 | //\r | |
206 | // Assemble ARP reply.\r | |
207 | //\r | |
208 | //\r | |
209 | // Create media header. [ dest mac | src mac | prot ]\r | |
210 | //\r | |
211 | CopyMem (\r | |
212 | &ArpReplyPacket.MediaHeader[0],\r | |
213 | SrcHwAddr,\r | |
214 | SnpMode->HwAddressSize\r | |
215 | );\r | |
216 | \r | |
217 | CopyMem (\r | |
218 | &ArpReplyPacket.MediaHeader[SnpMode->HwAddressSize],\r | |
219 | &SnpMode->CurrentAddress,\r | |
220 | SnpMode->HwAddressSize\r | |
221 | );\r | |
222 | \r | |
223 | CopyMem (\r | |
224 | &ArpReplyPacket.MediaHeader[2 * SnpMode->HwAddressSize],\r | |
225 | &((UINT8 *) MediaHeader)[2 * SnpMode->HwAddressSize],\r | |
226 | sizeof (UINT16)\r | |
227 | );\r | |
228 | \r | |
229 | //\r | |
230 | // ARP reply header is almost filled in,\r | |
231 | // just insert the correct opcode.\r | |
232 | //\r | |
233 | ArpReplyPacket.ArpHeader.OpCode = HTONS (ARP_REPLY);\r | |
234 | \r | |
235 | //\r | |
236 | // Now fill in ARP data. [ src mac | src prot | dest mac | dest prot ]\r | |
237 | //\r | |
238 | TmpPtr = ArpReplyPacket.ArpData;\r | |
239 | CopyMem (TmpPtr, &SnpMode->CurrentAddress, SnpMode->HwAddressSize);\r | |
240 | \r | |
241 | TmpPtr += SnpMode->HwAddressSize;\r | |
242 | CopyMem (TmpPtr, &PxeBcMode->StationIp, Private->IpLength);\r | |
243 | \r | |
244 | TmpPtr += Private->IpLength;\r | |
245 | CopyMem (TmpPtr, SrcHwAddr, SnpMode->HwAddressSize);\r | |
246 | \r | |
247 | TmpPtr += SnpMode->HwAddressSize;\r | |
248 | CopyMem (TmpPtr, SrcPrAddr, Private->IpLength);\r | |
249 | \r | |
250 | //\r | |
251 | // Now send out the ARP reply.\r | |
252 | //\r | |
253 | CopyMem (&TmpMacAddr, SrcHwAddr, sizeof (EFI_MAC_ADDRESS));\r | |
254 | \r | |
255 | SendPacket (\r | |
256 | Private,\r | |
257 | &ArpReplyPacket.MediaHeader,\r | |
258 | &ArpReplyPacket.ArpHeader,\r | |
259 | sizeof (ARP_HEADER) + 2 * (Private->IpLength + SnpMode->HwAddressSize),\r | |
260 | &TmpMacAddr,\r | |
261 | PXE_PROTOCOL_ETHERNET_ARP,\r | |
262 | EFI_PXE_BASE_CODE_FUNCTION_ARP\r | |
263 | );\r | |
264 | \r | |
265 | //\r | |
266 | // Give time (100 microseconds) for ARP reply to get onto wire.\r | |
267 | //\r | |
268 | gBS->Stall (1000);\r | |
269 | }\r | |
270 | \r | |
271 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
272 | BOOLEAN\r | |
273 | GetHwAddr (\r | |
274 | IN PXE_BASECODE_DEVICE *Private,\r | |
275 | IN EFI_IP_ADDRESS *ProtocolAddrPtr,\r | |
276 | OUT EFI_MAC_ADDRESS *HardwareAddrPtr\r | |
277 | )\r | |
278 | /*++\r | |
279 | Routine description:\r | |
280 | Locate IP address in ARP cache and return MAC address.\r | |
281 | \r | |
282 | Parameters:\r | |
283 | Private := Pointer to PxeBc interface\r | |
284 | ProtocolAddrPtr := Pointer to IP address\r | |
285 | HardwareAddrPtr := Pointer to MAC address storage\r | |
286 | \r | |
287 | Returns:\r | |
288 | TRUE := If IP address was found and MAC address was stored\r | |
289 | FALSE := If IP address was not found\r | |
290 | --*/\r | |
291 | {\r | |
292 | EFI_PXE_BASE_CODE_MODE *PxeBcMode;\r | |
293 | UINTN HardwareAddrLength;\r | |
294 | UINTN Index;\r | |
295 | \r | |
296 | PxeBcMode = Private->EfiBc.Mode;\r | |
297 | HardwareAddrLength = Private->SimpleNetwork->Mode->HwAddressSize;\r | |
298 | \r | |
299 | for (Index = 0; Index < PxeBcMode->ArpCacheEntries; ++Index) {\r | |
300 | if (!CompareMem (\r | |
301 | ProtocolAddrPtr,\r | |
302 | &PxeBcMode->ArpCache[Index].IpAddr,\r | |
303 | Private->IpLength\r | |
304 | )) {\r | |
305 | CopyMem (\r | |
306 | HardwareAddrPtr,\r | |
307 | &PxeBcMode->ArpCache[Index].MacAddr,\r | |
308 | HardwareAddrLength\r | |
309 | );\r | |
310 | \r | |
311 | return TRUE;\r | |
312 | }\r | |
313 | }\r | |
314 | \r | |
315 | return FALSE;\r | |
316 | }\r | |
317 | \r | |
318 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
319 | STATIC\r | |
320 | EFI_STATUS\r | |
321 | SendRequest (\r | |
322 | IN PXE_BASECODE_DEVICE *Private,\r | |
323 | IN EFI_IP_ADDRESS *ProtocolAddrPtr,\r | |
324 | IN EFI_MAC_ADDRESS *HardwareAddrPtr\r | |
325 | )\r | |
326 | /*++\r | |
327 | Routine description:\r | |
328 | Transmit ARP request packet\r | |
329 | \r | |
330 | Parameters:\r | |
331 | Private := Pointer to PxeBc interface\r | |
332 | ProtocolAddrPtr := Pointer IP address to find\r | |
333 | HardwareAddrPtr := Pointer to MAC address to find\r | |
334 | \r | |
335 | Returns:\r | |
336 | EFI_SUCCESS := ARP request sent\r | |
337 | other := ARP request could not be sent\r | |
338 | --*/\r | |
339 | {\r | |
340 | EFI_PXE_BASE_CODE_MODE *PxeBcMode;\r | |
341 | EFI_SIMPLE_NETWORK_MODE *SnpMode;\r | |
342 | ARP_PACKET *ArpPacket;\r | |
343 | EFI_STATUS Status;\r | |
344 | UINTN HardwareAddrLength;\r | |
345 | UINT8 *SrcProtocolAddrPtr;\r | |
346 | UINT8 *DestHardwareAddrptr;\r | |
347 | UINT8 *DestProtocolAddrPtr;\r | |
348 | \r | |
349 | //\r | |
350 | //\r | |
351 | //\r | |
352 | PxeBcMode = Private->EfiBc.Mode;\r | |
353 | SnpMode = Private->SimpleNetwork->Mode;\r | |
354 | HardwareAddrLength = SnpMode->HwAddressSize;\r | |
355 | \r | |
356 | //\r | |
357 | // Allocate ARP buffer\r | |
358 | //\r | |
359 | if (Private->ArpBuffer == NULL) {\r | |
360 | Status = gBS->AllocatePool (\r | |
361 | EfiBootServicesData,\r | |
362 | SnpMode->MediaHeaderSize + sizeof (ARP_PACKET),\r | |
363 | (VOID **) &Private->ArpBuffer\r | |
364 | );\r | |
365 | \r | |
366 | if (EFI_ERROR (Status)) {\r | |
367 | return Status;\r | |
368 | }\r | |
369 | }\r | |
370 | \r | |
371 | ArpPacket = (VOID *) (Private->ArpBuffer + SnpMode->MediaHeaderSize);\r | |
372 | \r | |
373 | //\r | |
374 | // for now, only handle one kind of hw and pr address\r | |
375 | //\r | |
376 | ArpPacket->ArpHeader = ArpHeader;\r | |
377 | ArpPacket->ArpHeader.HwAddLen = (UINT8) HardwareAddrLength;\r | |
378 | ArpPacket->ArpHeader.ProtAddLen = (UINT8) Private->IpLength;\r | |
379 | \r | |
380 | //\r | |
381 | // rest more generic\r | |
382 | //\r | |
383 | SrcProtocolAddrPtr = (UINT8 *) (&ArpPacket->SrcHardwareAddr) + HardwareAddrLength;\r | |
384 | DestHardwareAddrptr = SrcProtocolAddrPtr + Private->IpLength;\r | |
385 | DestProtocolAddrPtr = DestHardwareAddrptr + HardwareAddrLength;\r | |
386 | \r | |
387 | CopyMem (DestProtocolAddrPtr, ProtocolAddrPtr, Private->IpLength);\r | |
388 | CopyMem (DestHardwareAddrptr, HardwareAddrPtr, HardwareAddrLength);\r | |
389 | CopyMem (SrcProtocolAddrPtr, &PxeBcMode->StationIp, Private->IpLength);\r | |
390 | CopyMem (\r | |
391 | &ArpPacket->SrcHardwareAddr,\r | |
392 | &SnpMode->CurrentAddress,\r | |
393 | HardwareAddrLength\r | |
394 | );\r | |
395 | \r | |
396 | return SendPacket (\r | |
397 | Private,\r | |
398 | Private->ArpBuffer,\r | |
399 | ArpPacket,\r | |
400 | sizeof (ARP_HEADER) + ((Private->IpLength + HardwareAddrLength) << 1),\r | |
401 | &SnpMode->BroadcastAddress,\r | |
402 | PXE_PROTOCOL_ETHERNET_ARP,\r | |
403 | EFI_PXE_BASE_CODE_FUNCTION_ARP\r | |
404 | );\r | |
405 | }\r | |
406 | \r | |
407 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
408 | \r | |
409 | //\r | |
410 | // check for address - if not there, send ARP request, wait and check again\r | |
411 | // not how it would be done in a full system\r | |
412 | //\r | |
413 | #define ARP_REQUEST_TIMEOUT_MS 500 // try for half a second\r | |
414 | \r | |
415 | ////////////////////////////////////////////////////////////\r | |
416 | //\r | |
417 | // BC Arp Routine\r | |
418 | //\r | |
419 | EFI_STATUS\r | |
420 | EFIAPI\r | |
421 | BcArp (\r | |
422 | IN EFI_PXE_BASE_CODE_PROTOCOL * This,\r | |
423 | IN EFI_IP_ADDRESS * ProtocolAddrPtr,\r | |
424 | OUT EFI_MAC_ADDRESS * HardwareAddrPtr OPTIONAL\r | |
425 | )\r | |
426 | /*++\r | |
427 | Routine description:\r | |
428 | PxeBc ARP API.\r | |
429 | \r | |
430 | Parameters:\r | |
431 | This := Pointer to PxeBc interface\r | |
432 | ProtocolAddrPtr := Pointer to IP address to find\r | |
433 | HardwareAddrPtr := Pointer to MAC address found.\r | |
434 | \r | |
435 | Returns:\r | |
436 | --*/\r | |
437 | {\r | |
438 | EFI_MAC_ADDRESS Mac;\r | |
439 | EFI_STATUS StatCode;\r | |
440 | PXE_BASECODE_DEVICE *Private;\r | |
441 | \r | |
442 | //\r | |
443 | // Lock the instance data and make sure started\r | |
444 | //\r | |
445 | StatCode = EFI_SUCCESS;\r | |
446 | \r | |
447 | if (This == NULL) {\r | |
448 | DEBUG ((EFI_D_ERROR, "BC *This pointer == NULL"));\r | |
449 | return EFI_INVALID_PARAMETER;\r | |
450 | }\r | |
451 | \r | |
452 | Private = CR (This, PXE_BASECODE_DEVICE, EfiBc, PXE_BASECODE_DEVICE_SIGNATURE);\r | |
453 | \r | |
454 | if (Private == NULL) {\r | |
455 | DEBUG ((EFI_D_ERROR, "PXE_BASECODE_DEVICE poiner == NULL"));\r | |
456 | return EFI_INVALID_PARAMETER;\r | |
457 | }\r | |
458 | \r | |
459 | EfiAcquireLock (&Private->Lock);\r | |
460 | \r | |
461 | if (This->Mode == NULL || !This->Mode->Started) {\r | |
462 | DEBUG ((EFI_D_ERROR, "BC was not started."));\r | |
463 | EfiReleaseLock (&Private->Lock);\r | |
464 | return EFI_NOT_STARTED;\r | |
465 | }\r | |
466 | \r | |
467 | DEBUG ((EFI_D_INFO, "\nBcArp()"));\r | |
468 | \r | |
469 | //\r | |
470 | // Issue BC command\r | |
471 | //\r | |
472 | if (ProtocolAddrPtr == NULL) {\r | |
473 | DEBUG (\r | |
474 | (EFI_D_INFO,\r | |
475 | "\nBcArp() Exit #1 %Xh (%r)",\r | |
476 | EFI_INVALID_PARAMETER,\r | |
477 | EFI_INVALID_PARAMETER)\r | |
478 | );\r | |
479 | \r | |
480 | EfiReleaseLock (&Private->Lock);\r | |
481 | return EFI_INVALID_PARAMETER;\r | |
482 | }\r | |
483 | \r | |
484 | if (HardwareAddrPtr == NULL) {\r | |
485 | HardwareAddrPtr = &Mac;\r | |
486 | }\r | |
487 | \r | |
488 | ZeroMem (HardwareAddrPtr, Private->SimpleNetwork->Mode->HwAddressSize);\r | |
489 | \r | |
490 | if (GetHwAddr (Private, ProtocolAddrPtr, HardwareAddrPtr)) {\r | |
491 | DEBUG (\r | |
492 | (EFI_D_INFO,\r | |
493 | "\nBcArp() Exit #2 %Xh (%r)",\r | |
494 | EFI_SUCCESS,\r | |
495 | EFI_SUCCESS)\r | |
496 | );\r | |
497 | \r | |
498 | EfiReleaseLock (&Private->Lock);\r | |
499 | return EFI_SUCCESS;\r | |
500 | }\r | |
501 | \r | |
502 | StatCode = DoArp (Private, ProtocolAddrPtr, HardwareAddrPtr);\r | |
503 | \r | |
504 | DEBUG ((EFI_D_INFO, "\nBcArp() Exit #3 %Xh (%r)", StatCode, StatCode));\r | |
505 | \r | |
506 | EfiReleaseLock (&Private->Lock);\r | |
507 | return StatCode;\r | |
508 | }\r | |
509 | \r | |
510 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
511 | EFI_STATUS\r | |
512 | DoArp (\r | |
513 | IN PXE_BASECODE_DEVICE *Private,\r | |
514 | IN EFI_IP_ADDRESS *ProtocolAddrPtr,\r | |
515 | OUT EFI_MAC_ADDRESS *HardwareAddrPtr\r | |
516 | )\r | |
517 | /*++\r | |
518 | Routine description:\r | |
519 | Internal ARP implementation.\r | |
520 | \r | |
521 | Parameters:\r | |
522 | Private := Pointer to PxeBc interface\r | |
523 | ProtocolAddrPtr := Pointer to IP address to find\r | |
524 | HardwareAddrPtr := Pointer to MAC address found\r | |
525 | \r | |
526 | Returns:\r | |
527 | EFI_SUCCESS := MAC address found\r | |
528 | other := MAC address could not be found\r | |
529 | --*/\r | |
530 | {\r | |
531 | EFI_STATUS StatCode;\r | |
532 | EFI_EVENT TimeoutEvent;\r | |
533 | UINTN HeaderSize;\r | |
534 | UINTN BufferSize;\r | |
535 | UINT16 Protocol;\r | |
536 | \r | |
537 | DEBUG ((EFI_D_INFO, "\nDoArp()"));\r | |
538 | \r | |
539 | //\r | |
540 | //\r | |
541 | //\r | |
542 | StatCode = SendRequest (Private, ProtocolAddrPtr, HardwareAddrPtr);\r | |
543 | \r | |
544 | if (EFI_ERROR (StatCode)) {\r | |
545 | DEBUG ((EFI_D_INFO, "\nDoArp() Exit #1 %Xh (%r)", StatCode, StatCode));\r | |
546 | return StatCode;\r | |
547 | }\r | |
548 | //\r | |
549 | //\r | |
550 | //\r | |
551 | StatCode = gBS->CreateEvent (\r | |
552 | EFI_EVENT_TIMER,\r | |
553 | EFI_TPL_CALLBACK,\r | |
554 | NULL,\r | |
555 | NULL,\r | |
556 | &TimeoutEvent\r | |
557 | );\r | |
558 | \r | |
559 | if (EFI_ERROR (StatCode)) {\r | |
560 | return StatCode;\r | |
561 | }\r | |
562 | \r | |
563 | StatCode = gBS->SetTimer (\r | |
564 | TimeoutEvent,\r | |
565 | TimerRelative,\r | |
566 | ARP_REQUEST_TIMEOUT_MS * 10000\r | |
567 | );\r | |
568 | \r | |
569 | if (EFI_ERROR (StatCode)) {\r | |
570 | gBS->CloseEvent (TimeoutEvent);\r | |
571 | return StatCode;\r | |
572 | }\r | |
573 | //\r | |
574 | //\r | |
575 | //\r | |
576 | for (;;) {\r | |
577 | StatCode = WaitForReceive (\r | |
578 | Private,\r | |
579 | EFI_PXE_BASE_CODE_FUNCTION_ARP,\r | |
580 | TimeoutEvent,\r | |
581 | &HeaderSize,\r | |
582 | &BufferSize,\r | |
583 | &Protocol\r | |
584 | );\r | |
585 | \r | |
586 | if (EFI_ERROR (StatCode)) {\r | |
587 | break;\r | |
588 | }\r | |
589 | \r | |
590 | if (Protocol != PXE_PROTOCOL_ETHERNET_ARP) {\r | |
591 | continue;\r | |
592 | }\r | |
593 | \r | |
594 | HandleArpReceive (\r | |
595 | Private,\r | |
596 | (ARP_PACKET *) (Private->ReceiveBufferPtr + HeaderSize),\r | |
597 | Private->ReceiveBufferPtr\r | |
598 | );\r | |
599 | \r | |
600 | if (GetHwAddr (Private, ProtocolAddrPtr, HardwareAddrPtr)) {\r | |
601 | break;\r | |
602 | }\r | |
603 | }\r | |
604 | \r | |
605 | DEBUG (\r | |
606 | (EFI_D_INFO,\r | |
607 | "\nDoArp() Exit #2 %Xh, (%r)",\r | |
608 | StatCode,\r | |
609 | StatCode)\r | |
610 | );\r | |
611 | \r | |
612 | gBS->CloseEvent (TimeoutEvent);\r | |
613 | \r | |
614 | return StatCode;\r | |
615 | }\r | |
616 | \r | |
617 | /* eof - pxe_bc_arp.c */\r |