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a3bcde70 HT |
1 | /** @file\r |
2 | Support functions implementation for UefiPxeBc Driver.\r | |
3 | \r | |
c960bdc2 | 4 | Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>\r |
a3bcde70 HT |
5 | \r |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php.\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include "PxeBcImpl.h"\r | |
17 | \r | |
18 | \r | |
a3bcde70 HT |
19 | /**\r |
20 | Flush the previous configration using the new station Ip address.\r | |
21 | \r | |
22 | @param[in] Private The pointer to the PxeBc private data.\r | |
23 | @param[in] StationIp The pointer to the station Ip address.\r | |
24 | @param[in] SubnetMask The pointer to the subnet mask address for v4.\r | |
25 | \r | |
26 | @retval EFI_SUCCESS Successfully flushed the previous configuration.\r | |
27 | @retval Others Failed to flush using the new station Ip.\r | |
28 | \r | |
29 | **/\r | |
30 | EFI_STATUS\r | |
0e7f6f50 | 31 | PxeBcFlushStationIp (\r |
a3bcde70 HT |
32 | PXEBC_PRIVATE_DATA *Private,\r |
33 | EFI_IP_ADDRESS *StationIp,\r | |
34 | EFI_IP_ADDRESS *SubnetMask OPTIONAL\r | |
35 | )\r | |
36 | {\r | |
37 | EFI_PXE_BASE_CODE_MODE *Mode;\r | |
38 | EFI_STATUS Status;\r | |
39 | \r | |
40 | ASSERT (StationIp != NULL);\r | |
41 | \r | |
42 | Mode = Private->PxeBc.Mode;\r | |
43 | Status = EFI_SUCCESS;\r | |
44 | \r | |
45 | if (Mode->UsingIpv6) {\r | |
46 | \r | |
47 | CopyMem (&Private->Udp6CfgData.StationAddress, StationIp, sizeof (EFI_IPv6_ADDRESS));\r | |
48 | CopyMem (&Private->Ip6CfgData.StationAddress, StationIp, sizeof (EFI_IPv6_ADDRESS));\r | |
49 | \r | |
50 | //\r | |
51 | // Reconfigure the Ip6 instance to capture background ICMP6 packets with new station Ip address.\r | |
52 | //\r | |
53 | Private->Ip6->Cancel (Private->Ip6, &Private->Icmp6Token);\r | |
54 | Private->Ip6->Configure (Private->Ip6, NULL);\r | |
55 | \r | |
56 | Status = Private->Ip6->Configure (Private->Ip6, &Private->Ip6CfgData);\r | |
57 | if (EFI_ERROR (Status)) {\r | |
58 | goto ON_EXIT;\r | |
59 | }\r | |
60 | \r | |
61 | Status = Private->Ip6->Receive (Private->Ip6, &Private->Icmp6Token);\r | |
a3bcde70 HT |
62 | } else {\r |
63 | ASSERT (SubnetMask != NULL);\r | |
64 | CopyMem (&Private->Udp4CfgData.StationAddress, StationIp, sizeof (EFI_IPv4_ADDRESS));\r | |
65 | CopyMem (&Private->Udp4CfgData.SubnetMask, SubnetMask, sizeof (EFI_IPv4_ADDRESS));\r | |
66 | CopyMem (&Private->Ip4CfgData.StationAddress, StationIp, sizeof (EFI_IPv4_ADDRESS));\r | |
67 | CopyMem (&Private->Ip4CfgData.SubnetMask, SubnetMask, sizeof (EFI_IPv4_ADDRESS));\r | |
68 | \r | |
69 | //\r | |
70 | // Reconfigure the Ip4 instance to capture background ICMP packets with new station Ip address.\r | |
71 | //\r | |
72 | Private->Ip4->Cancel (Private->Ip4, &Private->IcmpToken);\r | |
73 | Private->Ip4->Configure (Private->Ip4, NULL);\r | |
74 | \r | |
75 | Status = Private->Ip4->Configure (Private->Ip4, &Private->Ip4CfgData);\r | |
76 | if (EFI_ERROR (Status)) {\r | |
77 | goto ON_EXIT;\r | |
78 | }\r | |
79 | \r | |
80 | Status = Private->Ip4->Receive (Private->Ip4, &Private->IcmpToken);\r | |
a3bcde70 HT |
81 | }\r |
82 | \r | |
83 | ON_EXIT:\r | |
84 | return Status;\r | |
85 | }\r | |
86 | \r | |
87 | \r | |
88 | /**\r | |
89 | Notify the callback function when an event is triggered.\r | |
90 | \r | |
91 | @param[in] Event The triggered event.\r | |
92 | @param[in] Context The opaque parameter to the function.\r | |
93 | \r | |
94 | **/\r | |
95 | VOID\r | |
96 | EFIAPI\r | |
97 | PxeBcCommonNotify (\r | |
98 | IN EFI_EVENT Event,\r | |
99 | IN VOID *Context\r | |
100 | )\r | |
101 | {\r | |
102 | *((BOOLEAN *) Context) = TRUE;\r | |
103 | }\r | |
104 | \r | |
105 | \r | |
106 | /**\r | |
107 | Do arp resolution from arp cache in PxeBcMode.\r | |
108 | \r | |
109 | @param Mode The pointer to EFI_PXE_BASE_CODE_MODE.\r | |
110 | @param Ip4Addr The Ip4 address for resolution.\r | |
111 | @param MacAddress The resoluted MAC address if the resolution is successful.\r | |
112 | The value is undefined if the resolution fails.\r | |
113 | \r | |
114 | @retval TRUE Found an matched entry.\r | |
115 | @retval FALSE Did not find a matched entry.\r | |
116 | \r | |
117 | **/\r | |
118 | BOOLEAN\r | |
119 | PxeBcCheckArpCache (\r | |
120 | IN EFI_PXE_BASE_CODE_MODE *Mode,\r | |
121 | IN EFI_IPv4_ADDRESS *Ip4Addr,\r | |
122 | OUT EFI_MAC_ADDRESS *MacAddress\r | |
123 | )\r | |
124 | {\r | |
125 | UINT32 Index;\r | |
126 | \r | |
127 | ASSERT (!Mode->UsingIpv6);\r | |
128 | \r | |
129 | //\r | |
130 | // Check whether the current Arp cache in mode data contains this information or not.\r | |
131 | //\r | |
132 | for (Index = 0; Index < Mode->ArpCacheEntries; Index++) {\r | |
133 | if (EFI_IP4_EQUAL (&Mode->ArpCache[Index].IpAddr.v4, Ip4Addr)) {\r | |
134 | CopyMem (\r | |
135 | MacAddress,\r | |
136 | &Mode->ArpCache[Index].MacAddr,\r | |
137 | sizeof (EFI_MAC_ADDRESS)\r | |
138 | );\r | |
139 | return TRUE;\r | |
140 | }\r | |
141 | }\r | |
142 | \r | |
143 | return FALSE;\r | |
144 | }\r | |
145 | \r | |
146 | \r | |
147 | /**\r | |
148 | Update the arp cache periodically.\r | |
149 | \r | |
150 | @param Event The pointer to EFI_PXE_BC_PROTOCOL.\r | |
151 | @param Context Context of the timer event.\r | |
152 | \r | |
153 | **/\r | |
154 | VOID\r | |
155 | EFIAPI\r | |
156 | PxeBcArpCacheUpdate (\r | |
157 | IN EFI_EVENT Event,\r | |
158 | IN VOID *Context\r | |
159 | )\r | |
160 | {\r | |
161 | PXEBC_PRIVATE_DATA *Private;\r | |
162 | EFI_PXE_BASE_CODE_MODE *Mode;\r | |
163 | EFI_ARP_FIND_DATA *ArpEntry;\r | |
164 | UINT32 EntryLength;\r | |
165 | UINT32 EntryCount;\r | |
166 | UINT32 Index;\r | |
167 | EFI_STATUS Status;\r | |
168 | \r | |
169 | Private = (PXEBC_PRIVATE_DATA *) Context;\r | |
170 | Mode = Private->PxeBc.Mode;\r | |
171 | \r | |
172 | ASSERT (!Mode->UsingIpv6);\r | |
173 | \r | |
174 | //\r | |
175 | // Get the current Arp cache from Arp driver.\r | |
176 | //\r | |
177 | Status = Private->Arp->Find (\r | |
178 | Private->Arp,\r | |
179 | TRUE,\r | |
180 | NULL,\r | |
181 | &EntryLength,\r | |
182 | &EntryCount,\r | |
183 | &ArpEntry,\r | |
184 | TRUE\r | |
185 | );\r | |
186 | if (EFI_ERROR (Status)) {\r | |
187 | return;\r | |
188 | }\r | |
189 | \r | |
190 | //\r | |
191 | // Update the Arp cache in mode data.\r | |
192 | //\r | |
193 | Mode->ArpCacheEntries = MIN (EntryCount, EFI_PXE_BASE_CODE_MAX_ARP_ENTRIES);\r | |
194 | \r | |
195 | for (Index = 0; Index < Mode->ArpCacheEntries; Index++) {\r | |
196 | CopyMem (\r | |
197 | &Mode->ArpCache[Index].IpAddr,\r | |
198 | ArpEntry + 1,\r | |
199 | ArpEntry->SwAddressLength\r | |
200 | );\r | |
201 | CopyMem (\r | |
202 | &Mode->ArpCache[Index].MacAddr,\r | |
203 | (UINT8 *) (ArpEntry + 1) + ArpEntry->SwAddressLength,\r | |
204 | ArpEntry->HwAddressLength\r | |
205 | );\r | |
206 | ArpEntry = (EFI_ARP_FIND_DATA *) ((UINT8 *) ArpEntry + EntryLength);\r | |
207 | }\r | |
208 | }\r | |
209 | \r | |
210 | \r | |
211 | /**\r | |
212 | Notify function to handle the received ICMP message in DPC.\r | |
213 | \r | |
214 | @param Context The PXEBC private data.\r | |
215 | \r | |
216 | **/\r | |
217 | VOID\r | |
218 | EFIAPI\r | |
219 | PxeBcIcmpErrorDpcHandle (\r | |
220 | IN VOID *Context\r | |
221 | )\r | |
222 | {\r | |
223 | EFI_STATUS Status;\r | |
224 | EFI_IP4_RECEIVE_DATA *RxData;\r | |
225 | EFI_IP4_PROTOCOL *Ip4;\r | |
226 | PXEBC_PRIVATE_DATA *Private;\r | |
227 | EFI_PXE_BASE_CODE_MODE *Mode;\r | |
228 | UINT8 Type;\r | |
229 | UINTN Index;\r | |
230 | UINT32 CopiedLen;\r | |
231 | UINT8 *IcmpError;\r | |
232 | \r | |
233 | Private = (PXEBC_PRIVATE_DATA *) Context;\r | |
234 | Mode = &Private->Mode;\r | |
235 | Status = Private->IcmpToken.Status;\r | |
236 | RxData = Private->IcmpToken.Packet.RxData;\r | |
237 | Ip4 = Private->Ip4;\r | |
238 | \r | |
239 | ASSERT (!Mode->UsingIpv6);\r | |
240 | \r | |
241 | if (Status == EFI_ABORTED) {\r | |
242 | //\r | |
243 | // It's triggered by user cancellation.\r | |
244 | //\r | |
245 | return;\r | |
246 | }\r | |
247 | \r | |
248 | if (RxData == NULL) {\r | |
249 | goto ON_EXIT;\r | |
250 | }\r | |
251 | \r | |
252 | if (Status != EFI_ICMP_ERROR) {\r | |
253 | //\r | |
254 | // The return status should be recognized as EFI_ICMP_ERROR.\r | |
255 | //\r | |
256 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
257 | goto ON_EXIT;\r | |
258 | }\r | |
259 | \r | |
260 | if (EFI_IP4 (RxData->Header->SourceAddress) != 0 &&\r | |
261 | !NetIp4IsUnicast (EFI_NTOHL (RxData->Header->SourceAddress), 0)) {\r | |
262 | //\r | |
263 | // The source address of the received packet should be a valid unicast address.\r | |
264 | //\r | |
265 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
266 | goto ON_EXIT;\r | |
267 | }\r | |
268 | \r | |
269 | if (!EFI_IP4_EQUAL (&RxData->Header->DestinationAddress, &Mode->StationIp.v4)) {\r | |
270 | //\r | |
271 | // The destination address of the received packet should be equal to the host address.\r | |
272 | //\r | |
273 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
274 | goto ON_EXIT;\r | |
275 | }\r | |
276 | \r | |
277 | if (RxData->Header->Protocol != EFI_IP_PROTO_ICMP) {\r | |
278 | //\r | |
279 | // The protocol value in the header of the receveid packet should be EFI_IP_PROTO_ICMP.\r | |
280 | //\r | |
281 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
282 | goto ON_EXIT;\r | |
283 | }\r | |
284 | \r | |
285 | Type = *((UINT8 *) RxData->FragmentTable[0].FragmentBuffer);\r | |
286 | \r | |
287 | if (Type != ICMP_DEST_UNREACHABLE &&\r | |
288 | Type != ICMP_SOURCE_QUENCH &&\r | |
289 | Type != ICMP_REDIRECT &&\r | |
290 | Type != ICMP_TIME_EXCEEDED &&\r | |
291 | Type != ICMP_PARAMETER_PROBLEM) {\r | |
292 | //\r | |
293 | // The type of the receveid ICMP message should be ICMP_ERROR_MESSAGE.\r | |
294 | //\r | |
295 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
296 | goto ON_EXIT;\r | |
297 | }\r | |
298 | \r | |
299 | //\r | |
300 | // Copy the right ICMP error message into mode data.\r | |
301 | //\r | |
302 | CopiedLen = 0;\r | |
303 | IcmpError = (UINT8 *) &Mode->IcmpError;\r | |
304 | \r | |
305 | for (Index = 0; Index < RxData->FragmentCount; Index++) {\r | |
306 | CopiedLen += RxData->FragmentTable[Index].FragmentLength;\r | |
307 | if (CopiedLen <= sizeof (EFI_PXE_BASE_CODE_ICMP_ERROR)) {\r | |
308 | CopyMem (\r | |
309 | IcmpError,\r | |
310 | RxData->FragmentTable[Index].FragmentBuffer,\r | |
311 | RxData->FragmentTable[Index].FragmentLength\r | |
312 | );\r | |
313 | } else {\r | |
314 | CopyMem (\r | |
315 | IcmpError,\r | |
316 | RxData->FragmentTable[Index].FragmentBuffer,\r | |
317 | CopiedLen - sizeof (EFI_PXE_BASE_CODE_ICMP_ERROR)\r | |
318 | );\r | |
319 | }\r | |
320 | IcmpError += CopiedLen;\r | |
321 | }\r | |
322 | \r | |
323 | ON_EXIT:\r | |
324 | Private->IcmpToken.Status = EFI_NOT_READY;\r | |
325 | Ip4->Receive (Ip4, &Private->IcmpToken);\r | |
326 | }\r | |
327 | \r | |
328 | \r | |
329 | /**\r | |
330 | Callback function to update the latest ICMP6 error message.\r | |
331 | \r | |
332 | @param Event The event signalled.\r | |
333 | @param Context The context passed in using the event notifier.\r | |
334 | \r | |
335 | **/\r | |
336 | VOID\r | |
337 | EFIAPI\r | |
338 | PxeBcIcmpErrorUpdate (\r | |
339 | IN EFI_EVENT Event,\r | |
340 | IN VOID *Context\r | |
341 | )\r | |
342 | {\r | |
343 | QueueDpc (TPL_CALLBACK, PxeBcIcmpErrorDpcHandle, Context);\r | |
344 | }\r | |
345 | \r | |
346 | \r | |
347 | /**\r | |
348 | Notify function to handle the received ICMP6 message in DPC.\r | |
349 | \r | |
350 | @param Context The PXEBC private data.\r | |
351 | \r | |
352 | **/\r | |
353 | VOID\r | |
354 | EFIAPI\r | |
355 | PxeBcIcmp6ErrorDpcHandle (\r | |
356 | IN VOID *Context\r | |
357 | )\r | |
358 | {\r | |
359 | PXEBC_PRIVATE_DATA *Private;\r | |
360 | EFI_IP6_RECEIVE_DATA *RxData;\r | |
361 | EFI_IP6_PROTOCOL *Ip6;\r | |
362 | EFI_PXE_BASE_CODE_MODE *Mode;\r | |
363 | EFI_STATUS Status;\r | |
364 | UINTN Index;\r | |
365 | UINT8 Type;\r | |
366 | UINT32 CopiedLen;\r | |
367 | UINT8 *Icmp6Error;\r | |
368 | \r | |
369 | Private = (PXEBC_PRIVATE_DATA *) Context;\r | |
370 | Mode = &Private->Mode;\r | |
371 | Status = Private->Icmp6Token.Status;\r | |
372 | RxData = Private->Icmp6Token.Packet.RxData;\r | |
373 | Ip6 = Private->Ip6;\r | |
374 | \r | |
375 | ASSERT (Mode->UsingIpv6);\r | |
376 | \r | |
377 | if (Status == EFI_ABORTED) {\r | |
378 | //\r | |
379 | // It's triggered by user cancellation.\r | |
380 | //\r | |
381 | return;\r | |
382 | }\r | |
383 | \r | |
384 | if (RxData == NULL) {\r | |
385 | goto ON_EXIT;\r | |
386 | }\r | |
387 | \r | |
388 | if (Status != EFI_ICMP_ERROR) {\r | |
389 | //\r | |
390 | // The return status should be recognized as EFI_ICMP_ERROR.\r | |
391 | //\r | |
392 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
393 | goto ON_EXIT;\r | |
394 | }\r | |
395 | \r | |
396 | if (!NetIp6IsValidUnicast (&RxData->Header->SourceAddress)) {\r | |
397 | //\r | |
398 | // The source address of the received packet should be a valid unicast address.\r | |
399 | //\r | |
400 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
401 | goto ON_EXIT;\r | |
402 | }\r | |
403 | \r | |
404 | if (!NetIp6IsUnspecifiedAddr (&Mode->StationIp.v6) &&\r | |
405 | !EFI_IP6_EQUAL (&RxData->Header->DestinationAddress, &Mode->StationIp.v6)) {\r | |
406 | //\r | |
407 | // The destination address of the received packet should be equal to the host address.\r | |
408 | //\r | |
409 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
410 | goto ON_EXIT;\r | |
411 | }\r | |
412 | \r | |
413 | if (RxData->Header->NextHeader != IP6_ICMP) {\r | |
414 | //\r | |
415 | // The nextheader in the header of the receveid packet should be IP6_ICMP.\r | |
416 | //\r | |
417 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
418 | goto ON_EXIT;\r | |
419 | }\r | |
420 | \r | |
421 | Type = *((UINT8 *) RxData->FragmentTable[0].FragmentBuffer);\r | |
422 | \r | |
423 | if (Type != ICMP_V6_DEST_UNREACHABLE &&\r | |
424 | Type != ICMP_V6_PACKET_TOO_BIG &&\r | |
425 | Type != ICMP_V6_PACKET_TOO_BIG &&\r | |
426 | Type != ICMP_V6_PARAMETER_PROBLEM) {\r | |
427 | //\r | |
428 | // The type of the receveid packet should be an ICMP6 error message.\r | |
429 | //\r | |
430 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
431 | goto ON_EXIT;\r | |
432 | }\r | |
433 | \r | |
434 | //\r | |
435 | // Copy the right ICMP6 error message into mode data.\r | |
436 | //\r | |
437 | CopiedLen = 0;\r | |
438 | Icmp6Error = (UINT8 *) &Mode->IcmpError;\r | |
439 | \r | |
440 | for (Index = 0; Index < RxData->FragmentCount; Index++) {\r | |
441 | CopiedLen += RxData->FragmentTable[Index].FragmentLength;\r | |
442 | if (CopiedLen <= sizeof (EFI_PXE_BASE_CODE_ICMP_ERROR)) {\r | |
443 | CopyMem (\r | |
444 | Icmp6Error,\r | |
445 | RxData->FragmentTable[Index].FragmentBuffer,\r | |
446 | RxData->FragmentTable[Index].FragmentLength\r | |
447 | );\r | |
448 | } else {\r | |
449 | CopyMem (\r | |
450 | Icmp6Error,\r | |
451 | RxData->FragmentTable[Index].FragmentBuffer,\r | |
452 | CopiedLen - sizeof (EFI_PXE_BASE_CODE_ICMP_ERROR)\r | |
453 | );\r | |
454 | }\r | |
455 | Icmp6Error += CopiedLen;\r | |
456 | }\r | |
457 | \r | |
458 | ON_EXIT:\r | |
459 | Private->Icmp6Token.Status = EFI_NOT_READY;\r | |
460 | Ip6->Receive (Ip6, &Private->Icmp6Token);\r | |
461 | }\r | |
462 | \r | |
463 | \r | |
464 | /**\r | |
465 | Callback function to update the latest ICMP6 error message.\r | |
466 | \r | |
467 | @param Event The event signalled.\r | |
468 | @param Context The context passed in using the event notifier.\r | |
469 | \r | |
470 | **/\r | |
471 | VOID\r | |
472 | EFIAPI\r | |
473 | PxeBcIcmp6ErrorUpdate (\r | |
474 | IN EFI_EVENT Event,\r | |
475 | IN VOID *Context\r | |
476 | )\r | |
477 | {\r | |
478 | QueueDpc (TPL_CALLBACK, PxeBcIcmp6ErrorDpcHandle, Context);\r | |
479 | }\r | |
480 | \r | |
481 | \r | |
482 | /**\r | |
483 | This function is to configure a UDPv4 instance for UdpWrite.\r | |
484 | \r | |
485 | @param[in] Udp4 The pointer to EFI_UDP4_PROTOCOL.\r | |
486 | @param[in] StationIp The pointer to the station address.\r | |
487 | @param[in] SubnetMask The pointer to the subnet mask.\r | |
488 | @param[in] Gateway The pointer to the gateway address.\r | |
489 | @param[in, out] SrcPort The pointer to the source port.\r | |
490 | @param[in] DoNotFragment If TRUE, fragment is not enabled.\r | |
491 | Otherwise, fragment is enabled.\r | |
492 | \r | |
493 | @retval EFI_SUCCESS Successfully configured this instance.\r | |
494 | @retval Others Failed to configure this instance.\r | |
495 | \r | |
496 | **/\r | |
497 | EFI_STATUS\r | |
498 | PxeBcConfigUdp4Write (\r | |
499 | IN EFI_UDP4_PROTOCOL *Udp4,\r | |
500 | IN EFI_IPv4_ADDRESS *StationIp,\r | |
501 | IN EFI_IPv4_ADDRESS *SubnetMask,\r | |
502 | IN EFI_IPv4_ADDRESS *Gateway,\r | |
503 | IN OUT UINT16 *SrcPort,\r | |
504 | IN BOOLEAN DoNotFragment\r | |
505 | )\r | |
506 | {\r | |
507 | EFI_UDP4_CONFIG_DATA Udp4CfgData;\r | |
508 | EFI_STATUS Status;\r | |
509 | \r | |
510 | ZeroMem (&Udp4CfgData, sizeof (Udp4CfgData));\r | |
511 | \r | |
512 | Udp4CfgData.TransmitTimeout = PXEBC_DEFAULT_LIFETIME;\r | |
513 | Udp4CfgData.ReceiveTimeout = PXEBC_DEFAULT_LIFETIME;\r | |
514 | Udp4CfgData.TypeOfService = DEFAULT_ToS;\r | |
515 | Udp4CfgData.TimeToLive = DEFAULT_TTL;\r | |
516 | Udp4CfgData.AllowDuplicatePort = TRUE;\r | |
517 | Udp4CfgData.DoNotFragment = DoNotFragment;\r | |
518 | \r | |
519 | CopyMem (&Udp4CfgData.StationAddress, StationIp, sizeof (*StationIp));\r | |
520 | CopyMem (&Udp4CfgData.SubnetMask, SubnetMask, sizeof (*SubnetMask));\r | |
521 | \r | |
522 | Udp4CfgData.StationPort = *SrcPort;\r | |
523 | \r | |
524 | //\r | |
525 | // Reset the UDPv4 instance.\r | |
526 | //\r | |
527 | Udp4->Configure (Udp4, NULL);\r | |
528 | \r | |
529 | Status = Udp4->Configure (Udp4, &Udp4CfgData);\r | |
530 | if (!EFI_ERROR (Status) && !EFI_IP4_EQUAL (Gateway, &mZeroIp4Addr)) {\r | |
531 | //\r | |
532 | // The basic configuration is OK, need to add the default route entry\r | |
533 | //\r | |
534 | Status = Udp4->Routes (Udp4, FALSE, &mZeroIp4Addr, &mZeroIp4Addr, Gateway);\r | |
535 | if (EFI_ERROR (Status)) {\r | |
536 | Udp4->Configure (Udp4, NULL);\r | |
537 | }\r | |
538 | }\r | |
539 | \r | |
540 | if (!EFI_ERROR (Status) && *SrcPort == 0) {\r | |
541 | Udp4->GetModeData (Udp4, &Udp4CfgData, NULL, NULL, NULL);\r | |
542 | *SrcPort = Udp4CfgData.StationPort;\r | |
543 | }\r | |
544 | \r | |
545 | return Status;\r | |
546 | }\r | |
547 | \r | |
548 | \r | |
549 | /**\r | |
550 | This function is to configure a UDPv6 instance for UdpWrite.\r | |
551 | \r | |
552 | @param[in] Udp6 The pointer to EFI_UDP6_PROTOCOL.\r | |
553 | @param[in] StationIp The pointer to the station address.\r | |
554 | @param[in, out] SrcPort The pointer to the source port.\r | |
555 | \r | |
556 | @retval EFI_SUCCESS Successfully configured this instance.\r | |
557 | @retval Others Failed to configure this instance.\r | |
558 | \r | |
559 | **/\r | |
560 | EFI_STATUS\r | |
561 | PxeBcConfigUdp6Write (\r | |
562 | IN EFI_UDP6_PROTOCOL *Udp6,\r | |
563 | IN EFI_IPv6_ADDRESS *StationIp,\r | |
564 | IN OUT UINT16 *SrcPort\r | |
565 | )\r | |
566 | {\r | |
567 | EFI_UDP6_CONFIG_DATA CfgData;\r | |
568 | EFI_STATUS Status;\r | |
569 | \r | |
570 | ZeroMem (&CfgData, sizeof (EFI_UDP6_CONFIG_DATA));\r | |
571 | \r | |
572 | CfgData.ReceiveTimeout = PXEBC_DEFAULT_LIFETIME;\r | |
573 | CfgData.TransmitTimeout = PXEBC_DEFAULT_LIFETIME;\r | |
574 | CfgData.HopLimit = PXEBC_DEFAULT_HOPLIMIT;\r | |
575 | CfgData.AllowDuplicatePort = TRUE;\r | |
576 | CfgData.StationPort = *SrcPort;\r | |
577 | \r | |
578 | CopyMem (&CfgData.StationAddress, StationIp, sizeof (EFI_IPv6_ADDRESS));\r | |
579 | \r | |
580 | //\r | |
581 | // Reset the UDPv6 instance.\r | |
582 | //\r | |
583 | Udp6->Configure (Udp6, NULL);\r | |
584 | \r | |
585 | Status = Udp6->Configure (Udp6, &CfgData);\r | |
586 | if (EFI_ERROR (Status)) {\r | |
587 | return Status;\r | |
588 | }\r | |
589 | \r | |
590 | if (!EFI_ERROR (Status) && *SrcPort == 0) {\r | |
591 | Udp6->GetModeData (Udp6, &CfgData, NULL, NULL, NULL);\r | |
592 | *SrcPort = CfgData.StationPort;\r | |
593 | }\r | |
594 | \r | |
595 | return Status;\r | |
596 | }\r | |
597 | \r | |
598 | \r | |
599 | /**\r | |
600 | This function is to configure a UDPv4 instance for UdpWrite.\r | |
601 | \r | |
602 | @param[in] Udp4 The pointer to EFI_UDP4_PROTOCOL.\r | |
603 | @param[in] Session The pointer to the UDP4 session data.\r | |
604 | @param[in] TimeoutEvent The event for timeout.\r | |
605 | @param[in] Gateway The pointer to the gateway address.\r | |
606 | @param[in] HeaderSize An optional field which may be set to the length of a header\r | |
607 | at HeaderPtr to be prefixed to the data at BufferPtr.\r | |
608 | @param[in] HeaderPtr If HeaderSize is not NULL, a pointer to a header to be\r | |
609 | prefixed to the data at BufferPtr.\r | |
610 | @param[in] BufferSize A pointer to the size of the data at BufferPtr.\r | |
611 | @param[in] BufferPtr A pointer to the data to be written.\r | |
612 | \r | |
613 | @retval EFI_SUCCESS Successfully send out data using Udp4Write.\r | |
614 | @retval Others Failed to send out data.\r | |
615 | \r | |
616 | **/\r | |
617 | EFI_STATUS\r | |
618 | PxeBcUdp4Write (\r | |
619 | IN EFI_UDP4_PROTOCOL *Udp4,\r | |
620 | IN EFI_UDP4_SESSION_DATA *Session,\r | |
621 | IN EFI_EVENT TimeoutEvent,\r | |
622 | IN EFI_IPv4_ADDRESS *Gateway OPTIONAL,\r | |
623 | IN UINTN *HeaderSize OPTIONAL,\r | |
624 | IN VOID *HeaderPtr OPTIONAL,\r | |
625 | IN UINTN *BufferSize,\r | |
626 | IN VOID *BufferPtr\r | |
627 | )\r | |
628 | {\r | |
629 | EFI_UDP4_COMPLETION_TOKEN Token;\r | |
630 | EFI_UDP4_TRANSMIT_DATA *TxData;\r | |
631 | UINT32 TxLength;\r | |
632 | UINT32 FragCount;\r | |
633 | UINT32 DataLength;\r | |
634 | BOOLEAN IsDone;\r | |
635 | EFI_STATUS Status;\r | |
636 | \r | |
637 | //\r | |
638 | // Arrange one fragment buffer for data, and another fragment buffer for header if has.\r | |
639 | //\r | |
640 | FragCount = (HeaderSize != NULL) ? 2 : 1;\r | |
641 | TxLength = sizeof (EFI_UDP4_TRANSMIT_DATA) + (FragCount - 1) * sizeof (EFI_UDP4_FRAGMENT_DATA);\r | |
642 | TxData = (EFI_UDP4_TRANSMIT_DATA *) AllocateZeroPool (TxLength);\r | |
643 | if (TxData == NULL) {\r | |
644 | return EFI_OUT_OF_RESOURCES;\r | |
645 | }\r | |
646 | \r | |
647 | TxData->FragmentCount = FragCount;\r | |
648 | TxData->FragmentTable[FragCount - 1].FragmentLength = (UINT32) *BufferSize;\r | |
649 | TxData->FragmentTable[FragCount - 1].FragmentBuffer = BufferPtr;\r | |
650 | DataLength = (UINT32) *BufferSize;\r | |
651 | \r | |
652 | if (HeaderSize != NULL) {\r | |
653 | TxData->FragmentTable[0].FragmentLength = (UINT32) *HeaderSize;\r | |
654 | TxData->FragmentTable[0].FragmentBuffer = HeaderPtr;\r | |
655 | DataLength += (UINT32) *HeaderSize;\r | |
656 | }\r | |
657 | \r | |
658 | if (Gateway != NULL) {\r | |
659 | TxData->GatewayAddress = Gateway;\r | |
660 | }\r | |
661 | \r | |
662 | TxData->UdpSessionData = Session;\r | |
663 | TxData->DataLength = DataLength;\r | |
664 | Token.Packet.TxData = TxData;\r | |
665 | Token.Status = EFI_NOT_READY;\r | |
666 | IsDone = FALSE;\r | |
667 | \r | |
668 | Status = gBS->CreateEvent (\r | |
669 | EVT_NOTIFY_SIGNAL,\r | |
670 | TPL_NOTIFY,\r | |
671 | PxeBcCommonNotify,\r | |
672 | &IsDone,\r | |
673 | &Token.Event\r | |
674 | );\r | |
675 | if (EFI_ERROR (Status)) {\r | |
676 | goto ON_EXIT;\r | |
677 | }\r | |
678 | \r | |
679 | Status = Udp4->Transmit (Udp4, &Token);\r | |
680 | if (EFI_ERROR (Status)) {\r | |
681 | goto ON_EXIT;\r | |
682 | }\r | |
683 | \r | |
684 | //\r | |
685 | // Poll the UDPv6 read instance if no packet received and no timeout triggered.\r | |
686 | //\r | |
687 | while (!IsDone &&\r | |
688 | Token.Status == EFI_NOT_READY &&\r | |
689 | EFI_ERROR (gBS->CheckEvent (TimeoutEvent))) {\r | |
690 | Udp4->Poll (Udp4);\r | |
691 | }\r | |
692 | \r | |
693 | Status = (Token.Status == EFI_NOT_READY) ? EFI_TIMEOUT : Token.Status;\r | |
694 | \r | |
695 | ON_EXIT:\r | |
696 | if (Token.Event != NULL) {\r | |
697 | gBS->CloseEvent (Token.Event);\r | |
698 | }\r | |
699 | FreePool (TxData);\r | |
700 | \r | |
701 | return Status;\r | |
702 | }\r | |
703 | \r | |
704 | \r | |
705 | /**\r | |
706 | This function is to configure a UDPv4 instance for UdpWrite.\r | |
707 | \r | |
708 | @param[in] Udp6 The pointer to EFI_UDP6_PROTOCOL.\r | |
709 | @param[in] Session The pointer to the UDP6 session data.\r | |
710 | @param[in] TimeoutEvent The event for timeout.\r | |
711 | @param[in] HeaderSize An optional field which may be set to the length of a header\r | |
712 | at HeaderPtr to be prefixed to the data at BufferPtr.\r | |
713 | @param[in] HeaderPtr If HeaderSize is not NULL, a pointer to a header to be\r | |
714 | prefixed to the data at BufferPtr.\r | |
715 | @param[in] BufferSize A pointer to the size of the data at BufferPtr.\r | |
716 | @param[in] BufferPtr A pointer to the data to be written.\r | |
717 | \r | |
718 | @retval EFI_SUCCESS Successfully sent out data using Udp6Write.\r | |
719 | @retval Others Failed to send out data.\r | |
720 | \r | |
721 | **/\r | |
722 | EFI_STATUS\r | |
723 | PxeBcUdp6Write (\r | |
724 | IN EFI_UDP6_PROTOCOL *Udp6,\r | |
725 | IN EFI_UDP6_SESSION_DATA *Session,\r | |
726 | IN EFI_EVENT TimeoutEvent,\r | |
727 | IN UINTN *HeaderSize OPTIONAL,\r | |
728 | IN VOID *HeaderPtr OPTIONAL,\r | |
729 | IN UINTN *BufferSize,\r | |
730 | IN VOID *BufferPtr\r | |
731 | )\r | |
732 | {\r | |
733 | EFI_UDP6_COMPLETION_TOKEN Token;\r | |
734 | EFI_UDP6_TRANSMIT_DATA *TxData;\r | |
735 | UINT32 TxLength;\r | |
736 | UINT32 FragCount;\r | |
737 | UINT32 DataLength;\r | |
738 | BOOLEAN IsDone;\r | |
739 | EFI_STATUS Status;\r | |
740 | \r | |
741 | //\r | |
742 | // Arrange one fragment buffer for data, and another fragment buffer for header if has.\r | |
743 | //\r | |
744 | FragCount = (HeaderSize != NULL) ? 2 : 1;\r | |
745 | TxLength = sizeof (EFI_UDP6_TRANSMIT_DATA) + (FragCount - 1) * sizeof (EFI_UDP6_FRAGMENT_DATA);\r | |
746 | TxData = (EFI_UDP6_TRANSMIT_DATA *) AllocateZeroPool (TxLength);\r | |
747 | if (TxData == NULL) {\r | |
748 | return EFI_OUT_OF_RESOURCES;\r | |
749 | }\r | |
750 | \r | |
751 | TxData->FragmentCount = FragCount;\r | |
752 | TxData->FragmentTable[FragCount - 1].FragmentLength = (UINT32) *BufferSize;\r | |
753 | TxData->FragmentTable[FragCount - 1].FragmentBuffer = BufferPtr;\r | |
754 | DataLength = (UINT32) *BufferSize;\r | |
755 | \r | |
756 | if (HeaderSize != NULL) {\r | |
757 | TxData->FragmentTable[0].FragmentLength = (UINT32) *HeaderSize;\r | |
758 | TxData->FragmentTable[0].FragmentBuffer = HeaderPtr;\r | |
759 | DataLength += (UINT32) *HeaderSize;\r | |
760 | }\r | |
761 | \r | |
762 | TxData->UdpSessionData = Session;\r | |
763 | TxData->DataLength = DataLength;\r | |
764 | Token.Packet.TxData = TxData;\r | |
765 | Token.Status = EFI_NOT_READY;\r | |
766 | IsDone = FALSE;\r | |
767 | \r | |
768 | Status = gBS->CreateEvent (\r | |
769 | EVT_NOTIFY_SIGNAL,\r | |
770 | TPL_NOTIFY,\r | |
771 | PxeBcCommonNotify,\r | |
772 | &IsDone,\r | |
773 | &Token.Event\r | |
774 | );\r | |
775 | if (EFI_ERROR (Status)) {\r | |
776 | goto ON_EXIT;\r | |
777 | }\r | |
778 | \r | |
779 | Status = Udp6->Transmit (Udp6, &Token);\r | |
780 | if (EFI_ERROR (Status)) {\r | |
781 | goto ON_EXIT;\r | |
782 | }\r | |
783 | \r | |
784 | //\r | |
785 | // Poll the UDPv6 read instance if no packet received and no timeout triggered.\r | |
786 | //\r | |
787 | while (!IsDone &&\r | |
788 | Token.Status == EFI_NOT_READY &&\r | |
789 | EFI_ERROR (gBS->CheckEvent (TimeoutEvent))) {\r | |
790 | Udp6->Poll (Udp6);\r | |
791 | }\r | |
792 | \r | |
793 | Status = (Token.Status == EFI_NOT_READY) ? EFI_TIMEOUT : Token.Status;\r | |
794 | \r | |
795 | ON_EXIT:\r | |
796 | if (Token.Event != NULL) {\r | |
797 | gBS->CloseEvent (Token.Event);\r | |
798 | }\r | |
799 | FreePool (TxData);\r | |
800 | \r | |
801 | return Status;\r | |
802 | }\r | |
803 | \r | |
804 | \r | |
805 | /**\r | |
806 | Check the received packet using the Ip filter.\r | |
807 | \r | |
808 | @param[in] Mode The pointer to the mode data of PxeBc.\r | |
809 | @param[in] Session The pointer to the current UDPv4 session.\r | |
810 | @param[in] OpFlags Operation flag for UdpRead/UdpWrite.\r | |
811 | \r | |
812 | @retval TRUE Passed the Ip filter successfully.\r | |
813 | @retval FALSE Failed to pass the Ip filter.\r | |
814 | \r | |
815 | **/\r | |
816 | BOOLEAN\r | |
817 | PxeBcCheckByIpFilter (\r | |
818 | IN EFI_PXE_BASE_CODE_MODE *Mode,\r | |
819 | IN VOID *Session,\r | |
820 | IN UINT16 OpFlags\r | |
821 | )\r | |
822 | {\r | |
823 | EFI_IP_ADDRESS DestinationIp;\r | |
824 | UINTN Index;\r | |
825 | \r | |
826 | if ((OpFlags & EFI_PXE_BASE_CODE_UDP_OPFLAGS_USE_FILTER) == 0) {\r | |
827 | return TRUE;\r | |
828 | }\r | |
829 | \r | |
830 | if ((Mode->IpFilter.Filters & EFI_PXE_BASE_CODE_IP_FILTER_PROMISCUOUS) != 0) {\r | |
831 | return TRUE;\r | |
832 | }\r | |
833 | \r | |
834 | //\r | |
835 | // Convert the destination address in session data to host order.\r | |
836 | //\r | |
837 | if (Mode->UsingIpv6) {\r | |
838 | CopyMem (\r | |
839 | &DestinationIp,\r | |
840 | &((EFI_UDP6_SESSION_DATA *) Session)->DestinationAddress,\r | |
841 | sizeof (EFI_IPv6_ADDRESS)\r | |
842 | );\r | |
843 | NTOHLLL (&DestinationIp.v6);\r | |
844 | } else {\r | |
845 | ZeroMem (&DestinationIp, sizeof (EFI_IP_ADDRESS));\r | |
846 | CopyMem (\r | |
847 | &DestinationIp,\r | |
848 | &((EFI_UDP4_SESSION_DATA *) Session)->DestinationAddress,\r | |
849 | sizeof (EFI_IPv4_ADDRESS)\r | |
850 | );\r | |
851 | EFI_NTOHL (DestinationIp);\r | |
852 | }\r | |
853 | \r | |
854 | if ((Mode->IpFilter.Filters & EFI_PXE_BASE_CODE_IP_FILTER_PROMISCUOUS_MULTICAST) != 0 &&\r | |
855 | (IP4_IS_MULTICAST (DestinationIp.Addr[0]) ||\r | |
856 | IP6_IS_MULTICAST (&DestinationIp))) {\r | |
857 | return TRUE;\r | |
858 | }\r | |
859 | \r | |
860 | if ((Mode->IpFilter.Filters & EFI_PXE_BASE_CODE_IP_FILTER_BROADCAST) != 0 &&\r | |
861 | IP4_IS_LOCAL_BROADCAST (DestinationIp.Addr[0])) {\r | |
862 | ASSERT (!Mode->UsingIpv6);\r | |
863 | return TRUE;\r | |
864 | }\r | |
865 | \r | |
866 | if ((Mode->IpFilter.Filters & EFI_PXE_BASE_CODE_IP_FILTER_STATION_IP) != 0 &&\r | |
867 | (EFI_IP4_EQUAL (&Mode->StationIp.v4, &DestinationIp) ||\r | |
868 | EFI_IP6_EQUAL (&Mode->StationIp.v6, &DestinationIp))) {\r | |
869 | //\r | |
870 | // Matched if the dest address is equal to the station address.\r | |
871 | //\r | |
872 | return TRUE;\r | |
873 | }\r | |
874 | \r | |
875 | for (Index = 0; Index < Mode->IpFilter.IpCnt; Index++) {\r | |
876 | ASSERT (Index < EFI_PXE_BASE_CODE_MAX_IPCNT);\r | |
877 | if (EFI_IP4_EQUAL (&Mode->IpFilter.IpList[Index].v4, &DestinationIp) ||\r | |
878 | EFI_IP6_EQUAL (&Mode->IpFilter.IpList[Index].v6, &DestinationIp)) {\r | |
879 | //\r | |
880 | // Matched if the dest address is equal to any of address in the filter list.\r | |
881 | //\r | |
882 | return TRUE;\r | |
883 | }\r | |
884 | }\r | |
885 | \r | |
886 | return FALSE;\r | |
887 | }\r | |
888 | \r | |
889 | \r | |
890 | /**\r | |
891 | Filter the received packet using the destination Ip.\r | |
892 | \r | |
893 | @param[in] Mode The pointer to the mode data of PxeBc.\r | |
894 | @param[in] Session The pointer to the current UDPv4 session.\r | |
895 | @param[in, out] DestIp The pointer to the destination Ip address.\r | |
896 | @param[in] OpFlags Operation flag for UdpRead/UdpWrite.\r | |
897 | \r | |
898 | @retval TRUE Passed the IPv4 filter successfully.\r | |
899 | @retval FALSE Failed to pass the IPv4 filter.\r | |
900 | \r | |
901 | **/\r | |
902 | BOOLEAN\r | |
903 | PxeBcCheckByDestIp (\r | |
904 | IN EFI_PXE_BASE_CODE_MODE *Mode,\r | |
905 | IN VOID *Session,\r | |
906 | IN OUT EFI_IP_ADDRESS *DestIp,\r | |
907 | IN UINT16 OpFlags\r | |
908 | )\r | |
909 | {\r | |
910 | if ((OpFlags & EFI_PXE_BASE_CODE_UDP_OPFLAGS_ANY_DEST_IP) != 0) {\r | |
911 | //\r | |
912 | // Copy the destination address from the received packet if accept any.\r | |
913 | //\r | |
914 | if (DestIp != NULL) {\r | |
915 | if (Mode->UsingIpv6) {\r | |
916 | CopyMem (\r | |
917 | DestIp,\r | |
918 | &((EFI_UDP6_SESSION_DATA *)Session)->DestinationAddress,\r | |
919 | sizeof (EFI_IPv6_ADDRESS)\r | |
920 | );\r | |
921 | } else {\r | |
922 | ZeroMem (DestIp, sizeof (EFI_IP_ADDRESS));\r | |
923 | CopyMem (\r | |
924 | DestIp,\r | |
925 | &((EFI_UDP4_SESSION_DATA *)Session)->DestinationAddress,\r | |
926 | sizeof (EFI_IPv4_ADDRESS)\r | |
927 | );\r | |
928 | }\r | |
929 | \r | |
930 | }\r | |
931 | return TRUE;\r | |
932 | } else if (DestIp != NULL &&\r | |
933 | (EFI_IP4_EQUAL (DestIp, &((EFI_UDP4_SESSION_DATA *)Session)->DestinationAddress) ||\r | |
934 | EFI_IP6_EQUAL (DestIp, &((EFI_UDP6_SESSION_DATA *)Session)->DestinationAddress))) {\r | |
935 | //\r | |
936 | // The destination address in the received packet is matched if present.\r | |
937 | //\r | |
938 | return TRUE;\r | |
939 | } else if (EFI_IP4_EQUAL (&Mode->StationIp, &((EFI_UDP4_SESSION_DATA *)Session)->DestinationAddress) ||\r | |
940 | EFI_IP6_EQUAL (&Mode->StationIp, &((EFI_UDP6_SESSION_DATA *)Session)->DestinationAddress)) {\r | |
941 | //\r | |
942 | // The destination address in the received packet is equal to the host address.\r | |
943 | //\r | |
944 | return TRUE;\r | |
945 | }\r | |
946 | \r | |
947 | return FALSE;\r | |
948 | }\r | |
949 | \r | |
950 | \r | |
951 | /**\r | |
952 | Check the received packet using the destination port.\r | |
953 | \r | |
76389e18 | 954 | @param[in] Mode The pointer to the mode data of PxeBc.\r |
a3bcde70 HT |
955 | @param[in] Session The pointer to the current UDPv4 session.\r |
956 | @param[in, out] DestPort The pointer to the destination port.\r | |
957 | @param[in] OpFlags Operation flag for UdpRead/UdpWrite.\r | |
958 | \r | |
959 | @retval TRUE Passed the IPv4 filter successfully.\r | |
960 | @retval FALSE Failed to pass the IPv4 filter.\r | |
961 | \r | |
962 | **/\r | |
963 | BOOLEAN\r | |
964 | PxeBcCheckByDestPort (\r | |
965 | IN EFI_PXE_BASE_CODE_MODE *Mode,\r | |
966 | IN VOID *Session,\r | |
967 | IN OUT UINT16 *DestPort,\r | |
968 | IN UINT16 OpFlags\r | |
969 | )\r | |
970 | {\r | |
971 | UINT16 Port;\r | |
972 | \r | |
973 | if (Mode->UsingIpv6) {\r | |
974 | Port = ((EFI_UDP6_SESSION_DATA *) Session)->DestinationPort;\r | |
975 | } else {\r | |
976 | Port = ((EFI_UDP4_SESSION_DATA *) Session)->DestinationPort;\r | |
977 | }\r | |
978 | \r | |
979 | if ((OpFlags & EFI_PXE_BASE_CODE_UDP_OPFLAGS_ANY_DEST_PORT) != 0) {\r | |
980 | //\r | |
981 | // Return the destination port in the received packet if accept any.\r | |
982 | //\r | |
983 | if (DestPort != NULL) {\r | |
984 | *DestPort = Port;\r | |
985 | }\r | |
986 | return TRUE;\r | |
987 | } else if (DestPort != NULL && *DestPort == Port) {\r | |
988 | //\r | |
989 | // The destination port in the received packet is matched if present.\r | |
990 | //\r | |
991 | return TRUE;\r | |
992 | }\r | |
993 | \r | |
994 | return FALSE;\r | |
995 | }\r | |
996 | \r | |
997 | \r | |
998 | /**\r | |
999 | Filter the received packet using the source Ip.\r | |
1000 | \r | |
1001 | @param[in] Mode The pointer to the mode data of PxeBc.\r | |
1002 | @param[in] Session The pointer to the current UDPv4 session.\r | |
1003 | @param[in, out] SrcIp The pointer to the source Ip address.\r | |
1004 | @param[in] OpFlags Operation flag for UdpRead/UdpWrite.\r | |
1005 | \r | |
1006 | @retval TRUE Passed the IPv4 filter successfully.\r | |
1007 | @retval FALSE Failed to pass the IPv4 filter.\r | |
1008 | \r | |
1009 | **/\r | |
1010 | BOOLEAN\r | |
1011 | PxeBcFilterBySrcIp (\r | |
1012 | IN EFI_PXE_BASE_CODE_MODE *Mode,\r | |
1013 | IN VOID *Session,\r | |
1014 | IN OUT EFI_IP_ADDRESS *SrcIp,\r | |
1015 | IN UINT16 OpFlags\r | |
1016 | )\r | |
1017 | {\r | |
1018 | if ((OpFlags & EFI_PXE_BASE_CODE_UDP_OPFLAGS_ANY_SRC_IP) != 0) {\r | |
1019 | //\r | |
1020 | // Copy the source address from the received packet if accept any.\r | |
1021 | //\r | |
1022 | if (SrcIp != NULL) {\r | |
1023 | if (Mode->UsingIpv6) {\r | |
1024 | CopyMem (\r | |
1025 | SrcIp,\r | |
1026 | &((EFI_UDP6_SESSION_DATA *)Session)->SourceAddress,\r | |
1027 | sizeof (EFI_IPv6_ADDRESS)\r | |
1028 | );\r | |
1029 | } else {\r | |
1030 | ZeroMem (SrcIp, sizeof (EFI_IP_ADDRESS));\r | |
1031 | CopyMem (\r | |
1032 | SrcIp,\r | |
1033 | &((EFI_UDP4_SESSION_DATA *)Session)->SourceAddress,\r | |
1034 | sizeof (EFI_IPv4_ADDRESS)\r | |
1035 | );\r | |
1036 | }\r | |
1037 | \r | |
1038 | }\r | |
1039 | return TRUE;\r | |
1040 | } else if (SrcIp != NULL &&\r | |
1041 | (EFI_IP4_EQUAL (SrcIp, &((EFI_UDP4_SESSION_DATA *)Session)->SourceAddress) ||\r | |
1042 | EFI_IP6_EQUAL (SrcIp, &((EFI_UDP6_SESSION_DATA *)Session)->SourceAddress))) {\r | |
1043 | //\r | |
1044 | // The source address in the received packet is matched if present.\r | |
1045 | //\r | |
1046 | return TRUE;\r | |
1047 | }\r | |
1048 | \r | |
1049 | return FALSE;\r | |
1050 | }\r | |
1051 | \r | |
1052 | \r | |
1053 | /**\r | |
1054 | Filter the received packet using the source port.\r | |
1055 | \r | |
1056 | @param[in] Mode The pointer to the mode data of PxeBc.\r | |
1057 | @param[in] Session The pointer to the current UDPv4 session.\r | |
1058 | @param[in, out] SrcPort The pointer to the source port.\r | |
1059 | @param[in] OpFlags Operation flag for UdpRead/UdpWrite.\r | |
1060 | \r | |
1061 | @retval TRUE Passed the IPv4 filter successfully.\r | |
1062 | @retval FALSE Failed to pass the IPv4 filter.\r | |
1063 | \r | |
1064 | **/\r | |
1065 | BOOLEAN\r | |
1066 | PxeBcFilterBySrcPort (\r | |
1067 | IN EFI_PXE_BASE_CODE_MODE *Mode,\r | |
1068 | IN VOID *Session,\r | |
1069 | IN OUT UINT16 *SrcPort,\r | |
1070 | IN UINT16 OpFlags\r | |
1071 | )\r | |
1072 | {\r | |
1073 | UINT16 Port;\r | |
1074 | \r | |
1075 | if (Mode->UsingIpv6) {\r | |
1076 | Port = ((EFI_UDP6_SESSION_DATA *) Session)->SourcePort;\r | |
1077 | } else {\r | |
1078 | Port = ((EFI_UDP4_SESSION_DATA *) Session)->SourcePort;\r | |
1079 | }\r | |
1080 | \r | |
1081 | if ((OpFlags & EFI_PXE_BASE_CODE_UDP_OPFLAGS_ANY_SRC_PORT) != 0) {\r | |
1082 | //\r | |
1083 | // Return the source port in the received packet if accept any.\r | |
1084 | //\r | |
1085 | if (SrcPort != NULL) {\r | |
1086 | *SrcPort = Port;\r | |
1087 | }\r | |
1088 | return TRUE;\r | |
1089 | } else if (SrcPort != NULL && *SrcPort == Port) {\r | |
1090 | //\r | |
1091 | // The source port in the received packet is matched if present.\r | |
1092 | //\r | |
1093 | return TRUE;\r | |
1094 | }\r | |
1095 | \r | |
1096 | return FALSE;\r | |
1097 | }\r | |
1098 | \r | |
1099 | \r | |
1100 | /**\r | |
1101 | This function is to receive packet using Udp4Read.\r | |
1102 | \r | |
1103 | @param[in] Udp4 The pointer to EFI_UDP4_PROTOCOL.\r | |
1104 | @param[in] Token The pointer to EFI_UDP4_COMPLETION_TOKEN.\r | |
1105 | @param[in] Mode The pointer to EFI_PXE_BASE_CODE_MODE.\r | |
1106 | @param[in] TimeoutEvent The event for timeout.\r | |
1107 | @param[in] OpFlags The UDP operation flags.\r | |
1108 | @param[in] IsDone The pointer to the IsDone flag.\r | |
1109 | @param[out] IsMatched The pointer to the IsMatched flag.\r | |
1110 | @param[in, out] DestIp The pointer to the destination address.\r | |
1111 | @param[in, out] DestPort The pointer to the destination port.\r | |
1112 | @param[in, out] SrcIp The pointer to the source address.\r | |
1113 | @param[in, out] SrcPort The pointer to the source port.\r | |
1114 | \r | |
1115 | @retval EFI_SUCCESS Successfully read the data using Udp4.\r | |
1116 | @retval Others Failed to send out data.\r | |
1117 | \r | |
1118 | **/\r | |
1119 | EFI_STATUS\r | |
1120 | PxeBcUdp4Read (\r | |
1121 | IN EFI_UDP4_PROTOCOL *Udp4,\r | |
1122 | IN EFI_UDP4_COMPLETION_TOKEN *Token,\r | |
1123 | IN EFI_PXE_BASE_CODE_MODE *Mode,\r | |
1124 | IN EFI_EVENT TimeoutEvent,\r | |
1125 | IN UINT16 OpFlags,\r | |
1126 | IN BOOLEAN *IsDone,\r | |
1127 | OUT BOOLEAN *IsMatched,\r | |
1128 | IN OUT EFI_IP_ADDRESS *DestIp OPTIONAL,\r | |
1129 | IN OUT EFI_PXE_BASE_CODE_UDP_PORT *DestPort OPTIONAL,\r | |
1130 | IN OUT EFI_IP_ADDRESS *SrcIp OPTIONAL,\r | |
1131 | IN OUT EFI_PXE_BASE_CODE_UDP_PORT *SrcPort OPTIONAL\r | |
1132 | )\r | |
1133 | {\r | |
1134 | EFI_UDP4_RECEIVE_DATA *RxData;\r | |
1135 | EFI_UDP4_SESSION_DATA *Session;\r | |
1136 | EFI_STATUS Status;\r | |
1137 | \r | |
1138 | Token->Status = EFI_NOT_READY;\r | |
1139 | *IsDone = FALSE;\r | |
1140 | \r | |
1141 | Status = Udp4->Receive (Udp4, Token);\r | |
1142 | if (EFI_ERROR (Status)) {\r | |
1143 | return Status;\r | |
1144 | }\r | |
1145 | \r | |
1146 | //\r | |
1147 | // Poll the UDPv6 read instance if no packet received and no timeout triggered.\r | |
1148 | //\r | |
1149 | while (!(*IsDone) &&\r | |
1150 | Token->Status == EFI_NOT_READY &&\r | |
1151 | EFI_ERROR (gBS->CheckEvent (TimeoutEvent))) {\r | |
1152 | //\r | |
1153 | // Poll the token utill reply/ICMPv6 error message received or timeout.\r | |
1154 | //\r | |
1155 | Udp4->Poll (Udp4);\r | |
1156 | if (Token->Status == EFI_ICMP_ERROR ||\r | |
1157 | Token->Status == EFI_NETWORK_UNREACHABLE ||\r | |
1158 | Token->Status == EFI_HOST_UNREACHABLE ||\r | |
1159 | Token->Status == EFI_PROTOCOL_UNREACHABLE ||\r | |
1160 | Token->Status == EFI_PORT_UNREACHABLE) {\r | |
1161 | break;\r | |
1162 | }\r | |
1163 | }\r | |
1164 | \r | |
1165 | Status = (Token->Status == EFI_NOT_READY) ? EFI_TIMEOUT : Token->Status;\r | |
1166 | \r | |
1167 | if (!EFI_ERROR (Status)) {\r | |
1168 | //\r | |
1169 | // check whether this packet matches the filters\r | |
1170 | //\r | |
1171 | RxData = Token->Packet.RxData;\r | |
1172 | Session = &RxData->UdpSession;\r | |
1173 | \r | |
1174 | *IsMatched = PxeBcCheckByIpFilter (Mode, Session, OpFlags);\r | |
1175 | \r | |
1176 | if (*IsMatched) {\r | |
1177 | *IsMatched = PxeBcCheckByDestIp (Mode, Session, DestIp, OpFlags);\r | |
1178 | }\r | |
1179 | \r | |
1180 | if (*IsMatched) {\r | |
1181 | *IsMatched = PxeBcCheckByDestPort (Mode, Session, DestPort, OpFlags);\r | |
1182 | }\r | |
1183 | \r | |
1184 | if (*IsMatched) {\r | |
1185 | *IsMatched = PxeBcFilterBySrcIp (Mode, Session, SrcIp, OpFlags);\r | |
1186 | }\r | |
1187 | \r | |
1188 | if (*IsMatched) {\r | |
1189 | *IsMatched = PxeBcFilterBySrcPort (Mode, Session, SrcPort, OpFlags);\r | |
1190 | }\r | |
1191 | \r | |
1192 | if (!(*IsMatched)) {\r | |
1193 | //\r | |
1194 | // Recycle the receiving buffer if not matched.\r | |
1195 | //\r | |
1196 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
1197 | }\r | |
1198 | }\r | |
1199 | \r | |
1200 | return Status;\r | |
1201 | }\r | |
1202 | \r | |
1203 | \r | |
1204 | /**\r | |
1205 | This function is to receive packets using Udp6Read.\r | |
1206 | \r | |
1207 | @param[in] Udp6 The pointer to EFI_UDP6_PROTOCOL.\r | |
1208 | @param[in] Token The pointer to EFI_UDP6_COMPLETION_TOKEN.\r | |
1209 | @param[in] Mode The pointer to EFI_PXE_BASE_CODE_MODE.\r | |
1210 | @param[in] TimeoutEvent The event for timeout.\r | |
1211 | @param[in] OpFlags The UDP operation flags.\r | |
1212 | @param[in] IsDone The pointer to the IsDone flag.\r | |
1213 | @param[out] IsMatched The pointer to the IsMatched flag.\r | |
1214 | @param[in, out] DestIp The pointer to the destination address.\r | |
1215 | @param[in, out] DestPort The pointer to the destination port.\r | |
1216 | @param[in, out] SrcIp The pointer to the source address.\r | |
1217 | @param[in, out] SrcPort The pointer to the source port.\r | |
1218 | \r | |
1219 | @retval EFI_SUCCESS Successfully read data using Udp6.\r | |
1220 | @retval Others Failed to send out data.\r | |
1221 | \r | |
1222 | **/\r | |
1223 | EFI_STATUS\r | |
1224 | PxeBcUdp6Read (\r | |
1225 | IN EFI_UDP6_PROTOCOL *Udp6,\r | |
1226 | IN EFI_UDP6_COMPLETION_TOKEN *Token,\r | |
1227 | IN EFI_PXE_BASE_CODE_MODE *Mode,\r | |
1228 | IN EFI_EVENT TimeoutEvent,\r | |
1229 | IN UINT16 OpFlags,\r | |
1230 | IN BOOLEAN *IsDone,\r | |
1231 | OUT BOOLEAN *IsMatched,\r | |
1232 | IN OUT EFI_IP_ADDRESS *DestIp OPTIONAL,\r | |
1233 | IN OUT EFI_PXE_BASE_CODE_UDP_PORT *DestPort OPTIONAL,\r | |
1234 | IN OUT EFI_IP_ADDRESS *SrcIp OPTIONAL,\r | |
1235 | IN OUT EFI_PXE_BASE_CODE_UDP_PORT *SrcPort OPTIONAL\r | |
1236 | )\r | |
1237 | {\r | |
1238 | EFI_UDP6_RECEIVE_DATA *RxData;\r | |
1239 | EFI_UDP6_SESSION_DATA *Session;\r | |
1240 | EFI_STATUS Status;\r | |
1241 | \r | |
1242 | Token->Status = EFI_NOT_READY;\r | |
1243 | *IsDone = FALSE;\r | |
1244 | \r | |
1245 | Status = Udp6->Receive (Udp6, Token);\r | |
1246 | if (EFI_ERROR (Status)) {\r | |
1247 | return Status;\r | |
1248 | }\r | |
1249 | \r | |
1250 | //\r | |
1251 | // Poll the UDPv6 read instance if no packet received and no timeout triggered.\r | |
1252 | //\r | |
1253 | while (!(*IsDone) &&\r | |
1254 | Token->Status == EFI_NOT_READY &&\r | |
1255 | EFI_ERROR (gBS->CheckEvent (TimeoutEvent))) {\r | |
1256 | //\r | |
1257 | // Poll the token utill reply/ICMPv6 error message received or timeout.\r | |
1258 | //\r | |
1259 | Udp6->Poll (Udp6);\r | |
1260 | if (Token->Status == EFI_ICMP_ERROR ||\r | |
1261 | Token->Status == EFI_NETWORK_UNREACHABLE ||\r | |
1262 | Token->Status == EFI_HOST_UNREACHABLE ||\r | |
1263 | Token->Status == EFI_PROTOCOL_UNREACHABLE ||\r | |
1264 | Token->Status == EFI_PORT_UNREACHABLE) {\r | |
1265 | break;\r | |
1266 | }\r | |
1267 | }\r | |
1268 | \r | |
1269 | Status = (Token->Status == EFI_NOT_READY) ? EFI_TIMEOUT : Token->Status;\r | |
1270 | \r | |
1271 | if (!EFI_ERROR (Status)) {\r | |
1272 | //\r | |
1273 | // check whether this packet matches the filters\r | |
1274 | //\r | |
1275 | RxData = Token->Packet.RxData;\r | |
1276 | Session = &RxData->UdpSession;\r | |
1277 | \r | |
1278 | *IsMatched = PxeBcCheckByIpFilter (Mode, Session, OpFlags);\r | |
1279 | \r | |
1280 | if (*IsMatched) {\r | |
1281 | *IsMatched = PxeBcCheckByDestIp (Mode, Session, DestIp, OpFlags);\r | |
1282 | }\r | |
1283 | \r | |
1284 | if (*IsMatched) {\r | |
1285 | *IsMatched = PxeBcCheckByDestPort (Mode, Session, DestPort, OpFlags);\r | |
1286 | }\r | |
1287 | \r | |
1288 | if (*IsMatched) {\r | |
1289 | *IsMatched = PxeBcFilterBySrcIp (Mode, Session, SrcIp, OpFlags);\r | |
1290 | }\r | |
1291 | \r | |
1292 | if (*IsMatched) {\r | |
1293 | *IsMatched = PxeBcFilterBySrcPort (Mode, Session, SrcPort, OpFlags);\r | |
1294 | }\r | |
1295 | \r | |
1296 | if (!(*IsMatched)) {\r | |
1297 | //\r | |
1298 | // Recycle the receiving buffer if not matched.\r | |
1299 | //\r | |
1300 | gBS->SignalEvent (RxData->RecycleSignal);\r | |
1301 | }\r | |
1302 | }\r | |
1303 | \r | |
1304 | return Status;\r | |
1305 | }\r | |
1306 | \r | |
1307 | \r | |
1308 | /**\r | |
1309 | This function is to display the IPv4 address.\r | |
1310 | \r | |
1311 | @param[in] Ip The pointer to the IPv4 address.\r | |
1312 | \r | |
1313 | **/\r | |
1314 | VOID\r | |
1315 | PxeBcShowIp4Addr (\r | |
1316 | IN EFI_IPv4_ADDRESS *Ip\r | |
1317 | )\r | |
1318 | {\r | |
1319 | UINTN Index;\r | |
1320 | \r | |
1321 | for (Index = 0; Index < 4; Index++) {\r | |
1322 | AsciiPrint ("%d", Ip->Addr[Index]);\r | |
1323 | if (Index < 3) {\r | |
1324 | AsciiPrint (".");\r | |
1325 | }\r | |
1326 | }\r | |
1327 | }\r | |
1328 | \r | |
1329 | \r | |
1330 | /**\r | |
1331 | This function is to display the IPv6 address.\r | |
1332 | \r | |
1333 | @param[in] Ip The pointer to the IPv6 address.\r | |
1334 | \r | |
1335 | **/\r | |
1336 | VOID\r | |
1337 | PxeBcShowIp6Addr (\r | |
1338 | IN EFI_IPv6_ADDRESS *Ip\r | |
1339 | )\r | |
1340 | {\r | |
1341 | UINTN Index;\r | |
1342 | \r | |
1343 | for (Index = 0; Index < 16; Index++) {\r | |
1344 | \r | |
1345 | if (Ip->Addr[Index] != 0) {\r | |
1346 | AsciiPrint ("%x", Ip->Addr[Index]);\r | |
1347 | }\r | |
1348 | Index++;\r | |
1349 | if (Index > 15) {\r | |
1350 | return;\r | |
1351 | }\r | |
1352 | if (((Ip->Addr[Index] & 0xf0) == 0) && (Ip->Addr[Index - 1] != 0)) {\r | |
1353 | AsciiPrint ("0");\r | |
1354 | }\r | |
1355 | AsciiPrint ("%x", Ip->Addr[Index]);\r | |
1356 | if (Index < 15) {\r | |
1357 | AsciiPrint (":");\r | |
1358 | }\r | |
1359 | }\r | |
1360 | }\r | |
1361 | \r | |
1362 | \r | |
1363 | /**\r | |
1364 | This function is to convert UINTN to ASCII string with the required formatting.\r | |
1365 | \r | |
1366 | @param[in] Number Numeric value to be converted.\r | |
1367 | @param[in] Buffer The pointer to the buffer for ASCII string.\r | |
1368 | @param[in] Length The length of the required format.\r | |
1369 | \r | |
1370 | **/\r | |
1371 | VOID\r | |
1372 | PxeBcUintnToAscDecWithFormat (\r | |
1373 | IN UINTN Number,\r | |
1374 | IN UINT8 *Buffer,\r | |
1375 | IN INTN Length\r | |
1376 | )\r | |
1377 | {\r | |
1378 | UINTN Remainder;\r | |
1379 | \r | |
1380 | while (Length > 0) {\r | |
1381 | Length--;\r | |
1382 | Remainder = Number % 10;\r | |
1383 | Number /= 10;\r | |
1384 | Buffer[Length] = (UINT8) ('0' + Remainder);\r | |
1385 | }\r | |
1386 | }\r | |
1387 | \r | |
1388 | \r | |
1389 | /**\r | |
1390 | This function is to convert a UINTN to a ASCII string, and return the\r | |
1391 | actual length of the buffer.\r | |
1392 | \r | |
1393 | @param[in] Number Numeric value to be converted.\r | |
1394 | @param[in] Buffer The pointer to the buffer for ASCII string.\r | |
c960bdc2 | 1395 | @param[in] BufferSize The maxsize of the buffer.\r |
a3bcde70 HT |
1396 | \r |
1397 | @return Length The actual length of the ASCII string.\r | |
1398 | \r | |
1399 | **/\r | |
1400 | UINTN\r | |
1401 | PxeBcUintnToAscDec (\r | |
1402 | IN UINTN Number,\r | |
c960bdc2 ZL |
1403 | IN UINT8 *Buffer,\r |
1404 | IN UINTN BufferSize\r | |
a3bcde70 HT |
1405 | )\r |
1406 | {\r | |
1407 | UINTN Index;\r | |
1408 | UINTN Length;\r | |
1409 | CHAR8 TempStr[64];\r | |
1410 | \r | |
1411 | Index = 63;\r | |
1412 | TempStr[Index] = 0;\r | |
1413 | \r | |
1414 | do {\r | |
1415 | Index--;\r | |
1416 | TempStr[Index] = (CHAR8) ('0' + (Number % 10));\r | |
1417 | Number = (UINTN) (Number / 10);\r | |
1418 | } while (Number != 0);\r | |
1419 | \r | |
c960bdc2 | 1420 | AsciiStrCpyS ((CHAR8 *) Buffer, BufferSize, &TempStr[Index]);\r |
a3bcde70 HT |
1421 | \r |
1422 | Length = AsciiStrLen ((CHAR8 *) Buffer);\r | |
1423 | \r | |
1424 | return Length;\r | |
1425 | }\r | |
1426 | \r | |
1427 | \r | |
1428 | /**\r | |
1429 | This function is to convert unicode hex number to a UINT8.\r | |
1430 | \r | |
1431 | @param[out] Digit The converted UINT8 for output.\r | |
1432 | @param[in] Char The unicode hex number to be converted.\r | |
1433 | \r | |
1434 | @retval EFI_SUCCESS Successfully converted the unicode hex.\r | |
1435 | @retval EFI_INVALID_PARAMETER Failed to convert the unicode hex.\r | |
1436 | \r | |
1437 | **/\r | |
1438 | EFI_STATUS\r | |
1439 | PxeBcUniHexToUint8 (\r | |
1440 | OUT UINT8 *Digit,\r | |
1441 | IN CHAR16 Char\r | |
1442 | )\r | |
1443 | {\r | |
1444 | if ((Char >= L'0') && (Char <= L'9')) {\r | |
1445 | *Digit = (UINT8) (Char - L'0');\r | |
1446 | return EFI_SUCCESS;\r | |
1447 | }\r | |
1448 | \r | |
1449 | if ((Char >= L'A') && (Char <= L'F')) {\r | |
1450 | *Digit = (UINT8) (Char - L'A' + 0x0A);\r | |
1451 | return EFI_SUCCESS;\r | |
1452 | }\r | |
1453 | \r | |
1454 | if ((Char >= L'a') && (Char <= L'f')) {\r | |
1455 | *Digit = (UINT8) (Char - L'a' + 0x0A);\r | |
1456 | return EFI_SUCCESS;\r | |
1457 | }\r | |
1458 | \r | |
1459 | return EFI_INVALID_PARAMETER;\r | |
1460 | }\r | |
129b8b09 | 1461 | \r |
1462 | /**\r | |
f43b7a54 | 1463 | Calculate the elapsed time.\r |
129b8b09 | 1464 | \r |
1465 | @param[in] Private The pointer to PXE private data\r | |
1466 | \r | |
1467 | **/\r | |
1468 | VOID\r | |
1469 | CalcElapsedTime (\r | |
1470 | IN PXEBC_PRIVATE_DATA *Private\r | |
1471 | )\r | |
1472 | {\r | |
1473 | EFI_TIME Time;\r | |
1474 | UINT64 CurrentStamp;\r | |
1475 | UINT64 ElapsedTimeValue;\r | |
1476 | \r | |
1477 | //\r | |
1478 | // Generate a time stamp of the centiseconds from 1900/1/1, assume 30day/month.\r | |
1479 | //\r | |
1480 | ZeroMem (&Time, sizeof (EFI_TIME));\r | |
1481 | gRT->GetTime (&Time, NULL);\r | |
1482 | CurrentStamp = (UINT64)\r | |
1483 | (\r | |
1484 | ((((((Time.Year - 1900) * 360 +\r | |
1485 | (Time.Month - 1)) * 30 +\r | |
1486 | (Time.Day - 1)) * 24 + Time.Hour) * 60 +\r | |
1487 | Time.Minute) * 60 + Time.Second) * 100\r | |
1488 | + DivU64x32(Time.Nanosecond, 10000000)\r | |
1489 | );\r | |
1490 | \r | |
1491 | //\r | |
1492 | // Sentinel value of 0 means that this is the first DHCP packet that we are\r | |
1493 | // sending and that we need to initialize the value. First DHCP Solicit\r | |
1494 | // gets 0 elapsed-time. Otherwise, calculate based on StartTime.\r | |
1495 | //\r | |
1496 | if (Private->ElapsedTime == 0) {\r | |
1497 | Private->ElapsedTime = CurrentStamp;\r | |
1498 | } else {\r | |
1499 | ElapsedTimeValue = CurrentStamp - Private->ElapsedTime;\r | |
1500 | \r | |
1501 | //\r | |
1502 | // If elapsed time cannot fit in two bytes, set it to 0xffff.\r | |
1503 | //\r | |
1504 | if (ElapsedTimeValue > 0xffff) {\r | |
1505 | ElapsedTimeValue = 0xffff;\r | |
1506 | }\r | |
1507 | //\r | |
1508 | // Save the elapsed time\r | |
1509 | //\r | |
1510 | Private->ElapsedTime = ElapsedTimeValue;\r | |
1511 | }\r | |
1512 | }\r | |
1513 | \r |