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878ddf1f | 1 | /*++\r |
2 | \r | |
e5f461a8 | 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 | |
878ddf1f | 11 | \r |
12 | Module Name:\r | |
13 | PxeDhcp4InitSelect.c\r | |
e5f461a8 | 14 | \r |
878ddf1f | 15 | Abstract:\r |
16 | \r | |
17 | --*/\r | |
18 | \r | |
19 | \r | |
20 | #include "PxeDhcp4.h"\r | |
21 | \r | |
878ddf1f | 22 | STATIC\r |
23 | INTN\r | |
24 | offer_verify (\r | |
25 | IN PXE_DHCP4_PRIVATE_DATA *Private,\r | |
26 | IN DHCP4_PACKET *tx_pkt,\r | |
27 | IN DHCP4_PACKET *rx_pkt,\r | |
28 | IN UINTN rx_pkt_size\r | |
29 | )\r | |
30 | /*++\r | |
31 | -2 = ignore, stop waiting\r | |
32 | -1 = ignore, keep waiting\r | |
33 | 0 = accept, keep waiting\r | |
34 | 1 = accept, stop waiting\r | |
35 | --*/\r | |
36 | {\r | |
37 | EFI_STATUS EfiStatus;\r | |
38 | DHCP4_PACKET *tmp;\r | |
39 | DHCP4_OP *msg_type_op;\r | |
40 | DHCP4_OP *srvid_op;\r | |
41 | UINT32 magik;\r | |
42 | \r | |
43 | //\r | |
44 | // Verify parameters. Touch unused parameters to keep\r | |
45 | // compiler happy.\r | |
46 | //\r | |
47 | ASSERT (Private);\r | |
48 | ASSERT (rx_pkt);\r | |
49 | \r | |
50 | if (Private == NULL || rx_pkt == NULL) {\r | |
51 | return -2;\r | |
52 | }\r | |
53 | \r | |
54 | tx_pkt = tx_pkt;\r | |
55 | rx_pkt_size = rx_pkt_size;\r | |
56 | \r | |
57 | //\r | |
58 | // This may be a BOOTP Reply or DHCP Offer packet.\r | |
59 | // If there is no DHCP magik number, assume that\r | |
60 | // this is a BOOTP Reply packet.\r | |
61 | //\r | |
62 | magik = htonl (DHCP4_MAGIK_NUMBER);\r | |
63 | \r | |
64 | while (!CompareMem (&rx_pkt->dhcp4.magik, &magik, 4)) {\r | |
65 | //\r | |
66 | // If there is no DHCP message type option, assume\r | |
67 | // this is a BOOTP reply packet and cache it.\r | |
68 | //\r | |
69 | EfiStatus = find_opt (rx_pkt, DHCP4_MESSAGE_TYPE, 0, &msg_type_op);\r | |
70 | \r | |
71 | if (EFI_ERROR (EfiStatus)) {\r | |
72 | break;\r | |
73 | }\r | |
74 | //\r | |
75 | // If there is a DHCP message type option, it must be a\r | |
76 | // DHCP offer packet\r | |
77 | //\r | |
78 | if (msg_type_op->len != 1) {\r | |
79 | return -1;\r | |
80 | }\r | |
81 | \r | |
82 | if (msg_type_op->data[0] != DHCP4_MESSAGE_TYPE_OFFER) {\r | |
83 | return -1;\r | |
84 | }\r | |
85 | //\r | |
86 | // There must be a server identifier option.\r | |
87 | //\r | |
88 | EfiStatus = find_opt (\r | |
89 | rx_pkt,\r | |
90 | DHCP4_SERVER_IDENTIFIER,\r | |
91 | 0,\r | |
92 | &srvid_op\r | |
93 | );\r | |
94 | \r | |
95 | if (EFI_ERROR (EfiStatus)) {\r | |
96 | return -1;\r | |
97 | }\r | |
98 | \r | |
99 | if (srvid_op->len != 4) {\r | |
100 | return -1;\r | |
101 | }\r | |
102 | //\r | |
103 | // Good DHCP offer packet.\r | |
104 | //\r | |
105 | break;\r | |
106 | }\r | |
107 | //\r | |
108 | // Good DHCP (or BOOTP) packet. Cache it!\r | |
109 | //\r | |
26aa0c2f LG |
110 | tmp = AllocatePool ((Private->offers + 1) * sizeof (DHCP4_PACKET));\r |
111 | if (tmp == NULL) {\r | |
878ddf1f | 112 | return -2;\r |
113 | }\r | |
114 | \r | |
115 | ASSERT (tmp);\r | |
116 | \r | |
117 | if (Private->offers != 0) {\r | |
118 | CopyMem (\r | |
119 | tmp,\r | |
120 | Private->offer_list,\r | |
121 | Private->offers * sizeof (DHCP4_PACKET)\r | |
122 | );\r | |
123 | \r | |
26aa0c2f | 124 | FreePool (Private->offer_list);\r |
878ddf1f | 125 | }\r |
126 | \r | |
127 | CopyMem (&tmp[Private->offers++], rx_pkt, sizeof (DHCP4_PACKET));\r | |
128 | \r | |
129 | Private->offer_list = tmp;\r | |
130 | \r | |
131 | return 0;\r | |
132 | }\r | |
133 | \r | |
134 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
135 | STATIC\r | |
136 | INTN\r | |
137 | acknak_verify (\r | |
138 | IN PXE_DHCP4_PRIVATE_DATA *Private,\r | |
139 | IN DHCP4_PACKET *tx_pkt,\r | |
140 | IN DHCP4_PACKET *rx_pkt,\r | |
141 | IN UINTN rx_pkt_size\r | |
142 | )\r | |
143 | /*++\r | |
144 | -2 = ignore, stop waiting\r | |
145 | -1 = ignore, keep waiting\r | |
146 | 0 = accept, keep waiting\r | |
147 | 1 = accept, stop waiting\r | |
148 | --*/\r | |
149 | {\r | |
150 | EFI_STATUS EfiStatus;\r | |
151 | DHCP4_OP *msg_type_op;\r | |
152 | DHCP4_OP *srvid_op;\r | |
153 | DHCP4_OP *renew_op;\r | |
154 | DHCP4_OP *rebind_op;\r | |
155 | DHCP4_OP *lease_time_op;\r | |
156 | UINT32 magik;\r | |
157 | \r | |
158 | //\r | |
159 | // Verify parameters. Touch unused parameters to\r | |
160 | // keep compiler happy.\r | |
161 | //\r | |
162 | ASSERT (Private);\r | |
163 | ASSERT (rx_pkt);\r | |
164 | \r | |
165 | if (Private == NULL || rx_pkt == NULL) {\r | |
166 | return -2;\r | |
167 | }\r | |
168 | \r | |
169 | tx_pkt = tx_pkt;\r | |
170 | rx_pkt_size = rx_pkt_size;\r | |
171 | \r | |
172 | //\r | |
173 | // This must be a DHCP Ack message.\r | |
174 | //\r | |
175 | magik = htonl (DHCP4_MAGIK_NUMBER);\r | |
176 | \r | |
177 | if (CompareMem (&rx_pkt->dhcp4.magik, &magik, 4)) {\r | |
178 | return -1;\r | |
179 | }\r | |
180 | \r | |
181 | EfiStatus = find_opt (rx_pkt, DHCP4_MESSAGE_TYPE, 0, &msg_type_op);\r | |
182 | \r | |
183 | if (EFI_ERROR (EfiStatus)) {\r | |
184 | return -1;\r | |
185 | }\r | |
186 | \r | |
187 | if (msg_type_op->len != 1) {\r | |
188 | return -1;\r | |
189 | }\r | |
190 | \r | |
191 | if (msg_type_op->data[0] != DHCP4_MESSAGE_TYPE_ACK) {\r | |
192 | return -1;\r | |
193 | }\r | |
194 | //\r | |
195 | // There must be a server identifier.\r | |
196 | //\r | |
197 | EfiStatus = find_opt (rx_pkt, DHCP4_SERVER_IDENTIFIER, 0, &srvid_op);\r | |
198 | \r | |
199 | if (EFI_ERROR (EfiStatus)) {\r | |
200 | return -1;\r | |
201 | }\r | |
202 | \r | |
203 | if (srvid_op->len != 4) {\r | |
204 | return -1;\r | |
205 | }\r | |
206 | //\r | |
207 | // There should be a renewal time.\r | |
208 | // If there is not, we will default to the 7/8 of the rebinding time.\r | |
209 | //\r | |
210 | EfiStatus = find_opt (rx_pkt, DHCP4_RENEWAL_TIME, 0, &renew_op);\r | |
211 | \r | |
212 | if (EFI_ERROR (EfiStatus)) {\r | |
213 | renew_op = NULL;\r | |
214 | } else if (renew_op->len != 4) {\r | |
215 | renew_op = NULL;\r | |
216 | }\r | |
217 | //\r | |
218 | // There should be a rebinding time.\r | |
219 | // If there is not, we will default to 7/8 of the lease time.\r | |
220 | //\r | |
221 | EfiStatus = find_opt (rx_pkt, DHCP4_REBINDING_TIME, 0, &rebind_op);\r | |
222 | \r | |
223 | if (EFI_ERROR (EfiStatus)) {\r | |
224 | rebind_op = NULL;\r | |
225 | } else if (rebind_op->len != 4) {\r | |
226 | rebind_op = NULL;\r | |
227 | }\r | |
228 | //\r | |
229 | // There should be a lease time.\r | |
230 | // If there is not, we will default to one week.\r | |
231 | //\r | |
232 | EfiStatus = find_opt (rx_pkt, DHCP4_LEASE_TIME, 0, &lease_time_op);\r | |
233 | \r | |
234 | if (EFI_ERROR (EfiStatus)) {\r | |
235 | lease_time_op = NULL;\r | |
236 | } else if (lease_time_op->len != 4) {\r | |
237 | lease_time_op = NULL;\r | |
238 | }\r | |
239 | //\r | |
240 | // Packet looks good. Double check the renew, rebind and lease times.\r | |
241 | //\r | |
242 | CopyMem (&Private->ServerIp, srvid_op->data, 4);\r | |
243 | \r | |
244 | if (renew_op != NULL) {\r | |
245 | CopyMem (&Private->RenewTime, renew_op->data, 4);\r | |
246 | Private->RenewTime = htonl (Private->RenewTime);\r | |
247 | } else {\r | |
248 | Private->RenewTime = 0;\r | |
249 | }\r | |
250 | \r | |
251 | if (rebind_op != NULL) {\r | |
252 | CopyMem (&Private->RebindTime, rebind_op->data, 4);\r | |
253 | Private->RebindTime = htonl (Private->RebindTime);\r | |
254 | } else {\r | |
255 | Private->RebindTime = 0;\r | |
256 | }\r | |
257 | \r | |
258 | if (lease_time_op != NULL) {\r | |
259 | CopyMem (&Private->LeaseTime, lease_time_op->data, 4);\r | |
260 | Private->LeaseTime = htonl (Private->LeaseTime);\r | |
261 | } else {\r | |
262 | Private->LeaseTime = 0;\r | |
263 | }\r | |
264 | \r | |
265 | if (Private->LeaseTime < 60) {\r | |
266 | Private->LeaseTime = 7 * 86400;\r | |
267 | }\r | |
268 | \r | |
269 | if (Private->RebindTime < 52 || Private->RebindTime >= Private->LeaseTime) {\r | |
270 | Private->RebindTime = Private->LeaseTime / 2 + Private->LeaseTime / 4 + Private->LeaseTime / 8;\r | |
271 | }\r | |
272 | \r | |
273 | if (Private->RenewTime < 45 || Private->RenewTime >= Private->RebindTime) {\r | |
274 | Private->RenewTime = Private->RebindTime / 2 + Private->RebindTime / 4 + Private->RebindTime / 8;\r | |
275 | }\r | |
276 | \r | |
277 | return 1;\r | |
278 | }\r | |
279 | \r | |
280 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
281 | EFI_STATUS\r | |
282 | EFIAPI\r | |
283 | PxeDhcp4Init (\r | |
284 | IN EFI_PXE_DHCP4_PROTOCOL *This,\r | |
285 | IN UINTN seconds_timeout,\r | |
286 | OUT UINTN *Offers,\r | |
287 | OUT DHCP4_PACKET **OfferList\r | |
288 | )\r | |
289 | {\r | |
290 | PXE_DHCP4_PRIVATE_DATA *Private;\r | |
291 | DHCP4_PACKET offer;\r | |
292 | EFI_IP_ADDRESS bcast_ip;\r | |
293 | EFI_STATUS EfiStatus;\r | |
294 | \r | |
295 | //\r | |
296 | // Verify parameters and protocol state.\r | |
297 | //\r | |
298 | if (This == NULL ||\r | |
299 | seconds_timeout < DHCP4_MIN_SECONDS ||\r | |
300 | seconds_timeout > DHCP4_MAX_SECONDS ||\r | |
301 | Offers == NULL ||\r | |
302 | OfferList == NULL\r | |
303 | ) {\r | |
304 | //\r | |
305 | // Return parameters are not initialized when\r | |
306 | // parameters are invalid!\r | |
307 | //\r | |
308 | return EFI_INVALID_PARAMETER;\r | |
309 | }\r | |
310 | \r | |
311 | *Offers = 0;\r | |
312 | *OfferList = NULL;\r | |
313 | \r | |
314 | //\r | |
315 | // Check protocol state.\r | |
316 | //\r | |
317 | if (This->Data == NULL) {\r | |
318 | return EFI_NOT_STARTED;\r | |
319 | }\r | |
320 | \r | |
321 | if (!This->Data->SetupCompleted) {\r | |
322 | return EFI_NOT_READY;\r | |
323 | }\r | |
324 | \r | |
878ddf1f | 325 | //\r |
326 | // Get pointer to our instance data.\r | |
327 | //\r | |
328 | Private = PXE_DHCP4_PRIVATE_DATA_FROM_THIS (This);\r | |
329 | \r | |
330 | if (Private == NULL) {\r | |
331 | return EFI_INVALID_PARAMETER;\r | |
332 | }\r | |
333 | \r | |
334 | if (Private->PxeBc == NULL) {\r | |
335 | return EFI_DEVICE_ERROR;\r | |
336 | }\r | |
337 | //\r | |
338 | // Setup variables...\r | |
339 | //\r | |
340 | Private->offers = 0;\r | |
341 | Private->offer_list = NULL;\r | |
342 | \r | |
343 | EfiStatus = gBS->HandleProtocol (\r | |
344 | Private->Handle,\r | |
345 | &gEfiPxeDhcp4CallbackProtocolGuid,\r | |
346 | (VOID *) &Private->callback\r | |
347 | );\r | |
348 | \r | |
349 | if (EFI_ERROR (EfiStatus)) {\r | |
350 | Private->callback = NULL;\r | |
351 | }\r | |
352 | \r | |
353 | Private->function = EFI_PXE_DHCP4_FUNCTION_INIT;\r | |
354 | \r | |
355 | //\r | |
356 | // Increment the transaction ID.\r | |
357 | //\r | |
358 | {\r | |
359 | UINT32 xid;\r | |
360 | \r | |
361 | CopyMem (&xid, &This->Data->Discover.dhcp4.xid, sizeof (UINT32));\r | |
362 | \r | |
363 | xid = htonl (htonl (xid) + 1);\r | |
364 | \r | |
365 | CopyMem (&This->Data->Discover.dhcp4.xid, &xid, sizeof (UINT32));\r | |
366 | }\r | |
367 | //\r | |
368 | // Transmit discover and wait for offers...\r | |
369 | //\r | |
370 | SetMem (&bcast_ip, sizeof (EFI_IP_ADDRESS), 0xFF);\r | |
371 | \r | |
372 | EfiStatus = tx_rx_udp (\r | |
373 | Private,\r | |
374 | &bcast_ip,\r | |
375 | NULL,\r | |
376 | NULL,\r | |
377 | NULL,\r | |
378 | &This->Data->Discover,\r | |
379 | &offer,\r | |
380 | &offer_verify,\r | |
381 | seconds_timeout\r | |
382 | );\r | |
383 | \r | |
384 | if (EFI_ERROR (EfiStatus)) {\r | |
385 | if (Private->offer_list) {\r | |
26aa0c2f | 386 | FreePool (Private->offer_list);\r |
878ddf1f | 387 | }\r |
388 | \r | |
389 | Private->offers = 0;\r | |
390 | Private->offer_list = NULL;\r | |
391 | Private->callback = NULL;\r | |
392 | \r | |
3aaddf92 | 393 | DEBUG ((EFI_D_ERROR, "%r\n", EfiStatus));\r |
878ddf1f | 394 | return EfiStatus;\r |
395 | }\r | |
396 | \r | |
397 | *Offers = Private->offers;\r | |
398 | *OfferList = Private->offer_list;\r | |
399 | \r | |
400 | Private->offers = 0;\r | |
401 | Private->offer_list = NULL;\r | |
402 | Private->callback = NULL;\r | |
403 | \r | |
404 | This->Data->InitCompleted = TRUE;\r | |
405 | This->Data->SelectCompleted = FALSE;\r | |
406 | This->Data->IsBootp = FALSE;\r | |
407 | This->Data->IsAck = FALSE;\r | |
408 | \r | |
409 | return EFI_SUCCESS;\r | |
410 | }\r | |
411 | \r | |
412 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r | |
413 | EFI_STATUS\r | |
414 | EFIAPI\r | |
415 | PxeDhcp4Select (\r | |
416 | IN EFI_PXE_DHCP4_PROTOCOL *This,\r | |
417 | IN UINTN seconds_timeout,\r | |
418 | IN DHCP4_PACKET *Offer\r | |
419 | )\r | |
420 | {\r | |
421 | PXE_DHCP4_PRIVATE_DATA *Private;\r | |
422 | EFI_STATUS EfiStatus;\r | |
423 | DHCP4_PACKET request;\r | |
424 | DHCP4_PACKET acknak;\r | |
425 | EFI_IP_ADDRESS bcast_ip;\r | |
426 | EFI_IP_ADDRESS zero_ip;\r | |
427 | EFI_IP_ADDRESS local_ip;\r | |
428 | DHCP4_OP *srvid;\r | |
429 | DHCP4_OP *op;\r | |
430 | UINT32 dhcp4_magik;\r | |
431 | UINT8 buf[16];\r | |
432 | BOOLEAN is_bootp;\r | |
433 | \r | |
434 | //\r | |
435 | // Verify parameters.\r | |
436 | //\r | |
437 | if (This == NULL || seconds_timeout < DHCP4_MIN_SECONDS || seconds_timeout > DHCP4_MAX_SECONDS || Offer == NULL) {\r | |
438 | return EFI_INVALID_PARAMETER;\r | |
439 | }\r | |
440 | //\r | |
441 | // Check protocol state.\r | |
442 | //\r | |
443 | if (This->Data == NULL) {\r | |
444 | return EFI_NOT_STARTED;\r | |
445 | }\r | |
446 | \r | |
447 | if (!This->Data->SetupCompleted) {\r | |
448 | return EFI_NOT_READY;\r | |
449 | }\r | |
450 | //\r | |
451 | // Get pointer to instance data.\r | |
452 | //\r | |
453 | Private = PXE_DHCP4_PRIVATE_DATA_FROM_THIS (This);\r | |
454 | \r | |
455 | if (Private == NULL) {\r | |
456 | return EFI_INVALID_PARAMETER;\r | |
457 | }\r | |
458 | \r | |
459 | if (Private->PxeBc == NULL) {\r | |
460 | return EFI_DEVICE_ERROR;\r | |
461 | }\r | |
462 | \r | |
878ddf1f | 463 | //\r |
464 | // Setup useful variables...\r | |
465 | //\r | |
466 | SetMem (&bcast_ip, sizeof (EFI_IP_ADDRESS), 0xFF);\r | |
467 | \r | |
468 | ZeroMem (&zero_ip, sizeof (EFI_IP_ADDRESS));\r | |
469 | \r | |
470 | ZeroMem (&local_ip, sizeof (EFI_IP_ADDRESS));\r | |
471 | local_ip.v4.Addr[0] = 127;\r | |
472 | local_ip.v4.Addr[3] = 1;\r | |
473 | \r | |
474 | This->Data->SelectCompleted = FALSE;\r | |
475 | This->Data->IsBootp = FALSE;\r | |
476 | This->Data->IsAck = FALSE;\r | |
477 | \r | |
478 | EfiStatus = gBS->HandleProtocol (\r | |
479 | Private->Handle,\r | |
480 | &gEfiPxeDhcp4CallbackProtocolGuid,\r | |
481 | (VOID *) &Private->callback\r | |
482 | );\r | |
483 | \r | |
484 | if (EFI_ERROR (EfiStatus)) {\r | |
485 | Private->callback = NULL;\r | |
486 | }\r | |
487 | \r | |
488 | Private->function = EFI_PXE_DHCP4_FUNCTION_SELECT;\r | |
489 | \r | |
490 | //\r | |
491 | // Verify offer packet fields.\r | |
492 | //\r | |
493 | if (Offer->dhcp4.op != BOOTP_REPLY) {\r | |
494 | Private->callback = NULL;\r | |
495 | return EFI_INVALID_PARAMETER;\r | |
496 | }\r | |
497 | \r | |
498 | if (Offer->dhcp4.htype != This->Data->Discover.dhcp4.htype) {\r | |
499 | Private->callback = NULL;\r | |
500 | return EFI_INVALID_PARAMETER;\r | |
501 | }\r | |
502 | \r | |
503 | if (Offer->dhcp4.hlen != This->Data->Discover.dhcp4.hlen) {\r | |
504 | Private->callback = NULL;\r | |
505 | return EFI_INVALID_PARAMETER;\r | |
506 | }\r | |
507 | \r | |
508 | if (CompareMem (&Offer->dhcp4.xid, &This->Data->Discover.dhcp4.xid, 4)) {\r | |
509 | Private->callback = NULL;\r | |
510 | return EFI_INVALID_PARAMETER;\r | |
511 | }\r | |
512 | \r | |
513 | if (!CompareMem (&Offer->dhcp4.yiaddr, &bcast_ip, 4)) {\r | |
514 | Private->callback = NULL;\r | |
515 | return EFI_INVALID_PARAMETER;\r | |
516 | }\r | |
517 | \r | |
518 | if (!CompareMem (&Offer->dhcp4.yiaddr, &zero_ip, 4)) {\r | |
519 | Private->callback = NULL;\r | |
520 | return EFI_INVALID_PARAMETER;\r | |
521 | }\r | |
522 | \r | |
523 | if (!CompareMem (&Offer->dhcp4.yiaddr, &local_ip, 4)) {\r | |
524 | Private->callback = NULL;\r | |
525 | return EFI_INVALID_PARAMETER;\r | |
526 | }\r | |
527 | \r | |
528 | if (CompareMem (\r | |
529 | &Offer->dhcp4.chaddr,\r | |
530 | &This->Data->Discover.dhcp4.chaddr,\r | |
531 | 16\r | |
532 | )) {\r | |
533 | Private->callback = NULL;\r | |
534 | return EFI_INVALID_PARAMETER;\r | |
535 | }\r | |
536 | //\r | |
537 | // DHCP option checks\r | |
538 | //\r | |
539 | dhcp4_magik = htonl (DHCP4_MAGIK_NUMBER);\r | |
540 | is_bootp = TRUE;\r | |
541 | \r | |
542 | if (!CompareMem (&Offer->dhcp4.magik, &dhcp4_magik, 4)) {\r | |
543 | //\r | |
544 | // If present, DHCP message type must be offer.\r | |
545 | //\r | |
546 | EfiStatus = find_opt (Offer, DHCP4_MESSAGE_TYPE, 0, &op);\r | |
547 | \r | |
548 | if (!EFI_ERROR (EfiStatus)) {\r | |
549 | if (op->len != 1 || op->data[0] != DHCP4_MESSAGE_TYPE_OFFER) {\r | |
550 | Private->callback = NULL;\r | |
551 | return EFI_INVALID_PARAMETER;\r | |
552 | }\r | |
553 | \r | |
554 | is_bootp = FALSE;\r | |
555 | }\r | |
556 | //\r | |
557 | // If present, DHCP max message size must be valid.\r | |
558 | //\r | |
559 | EfiStatus = find_opt (Offer, DHCP4_MAX_MESSAGE_SIZE, 0, &op);\r | |
560 | \r | |
561 | if (!EFI_ERROR (EfiStatus)) {\r | |
562 | if (op->len != 2 || ((op->data[0] << 8) | op->data[1]) < DHCP4_DEFAULT_MAX_MESSAGE_SIZE) {\r | |
563 | Private->callback = NULL;\r | |
564 | return EFI_INVALID_PARAMETER;\r | |
565 | }\r | |
566 | }\r | |
567 | //\r | |
568 | // If present, DHCP server identifier must be valid.\r | |
569 | //\r | |
570 | EfiStatus = find_opt (Offer, DHCP4_SERVER_IDENTIFIER, 0, &op);\r | |
571 | \r | |
572 | if (!EFI_ERROR (EfiStatus)) {\r | |
573 | if (op->len != 4 || !CompareMem (op->data, &bcast_ip, 4) || !CompareMem (op->data, &zero_ip, 4)) {\r | |
574 | Private->callback = NULL;\r | |
575 | return EFI_INVALID_PARAMETER;\r | |
576 | }\r | |
577 | }\r | |
578 | //\r | |
579 | // If present, DHCP subnet mask must be valid.\r | |
580 | //\r | |
581 | EfiStatus = find_opt (\r | |
582 | Offer,\r | |
583 | DHCP4_SUBNET_MASK,\r | |
584 | 0,\r | |
585 | &op\r | |
586 | );\r | |
587 | \r | |
588 | if (!EFI_ERROR (EfiStatus)) {\r | |
589 | if (op->len != 4) {\r | |
590 | Private->callback = NULL;\r | |
591 | return EFI_INVALID_PARAMETER;\r | |
592 | }\r | |
593 | }\r | |
594 | }\r | |
595 | //\r | |
596 | // Early out for BOOTP.\r | |
597 | //\r | |
598 | This->Data->IsBootp = is_bootp;\r | |
599 | if (is_bootp) {\r | |
600 | //\r | |
601 | // Copy offer packet to instance data.\r | |
602 | //\r | |
603 | CopyMem (&This->Data->Offer, Offer, sizeof (DHCP4_PACKET));\r | |
604 | \r | |
605 | //\r | |
606 | // Copy discover to request and offer to acknak.\r | |
607 | //\r | |
608 | CopyMem (\r | |
609 | &This->Data->Request,\r | |
610 | &This->Data->Discover,\r | |
611 | sizeof (DHCP4_PACKET)\r | |
612 | );\r | |
613 | \r | |
614 | CopyMem (\r | |
615 | &This->Data->AckNak,\r | |
616 | &This->Data->Offer,\r | |
617 | sizeof (DHCP4_PACKET)\r | |
618 | );\r | |
619 | \r | |
620 | //\r | |
621 | // Set state flags.\r | |
622 | //\r | |
623 | This->Data->SelectCompleted = TRUE;\r | |
624 | This->Data->IsAck = TRUE;\r | |
625 | \r | |
626 | Private->callback = NULL;\r | |
627 | return EFI_SUCCESS;\r | |
628 | }\r | |
629 | //\r | |
630 | // Copy discover packet contents to request packet.\r | |
631 | //\r | |
632 | CopyMem (&request, &This->Data->Discover, sizeof (DHCP4_PACKET));\r | |
633 | \r | |
634 | This->Data->IsAck = FALSE;\r | |
635 | \r | |
636 | //\r | |
637 | // Change DHCP message type from discover to request.\r | |
638 | //\r | |
639 | EfiStatus = find_opt (&request, DHCP4_MESSAGE_TYPE, 0, &op);\r | |
640 | \r | |
641 | if (EFI_ERROR (EfiStatus) && EfiStatus != EFI_NOT_FOUND) {\r | |
642 | Private->callback = NULL;\r | |
643 | return EFI_INVALID_PARAMETER;\r | |
644 | }\r | |
645 | \r | |
646 | if (EfiStatus == EFI_NOT_FOUND) {\r | |
647 | EfiStatus = find_opt (&request, DHCP4_END, 0, &op);\r | |
648 | \r | |
649 | if (EFI_ERROR (EfiStatus)) {\r | |
650 | Private->callback = NULL;\r | |
651 | return EFI_INVALID_PARAMETER;\r | |
652 | }\r | |
653 | \r | |
654 | op->op = DHCP4_MESSAGE_TYPE;\r | |
655 | op->len = 1;\r | |
656 | \r | |
657 | op->data[1] = DHCP4_END;\r | |
658 | }\r | |
659 | \r | |
660 | op->data[0] = DHCP4_MESSAGE_TYPE_REQUEST;\r | |
661 | \r | |
662 | //\r | |
663 | // Copy server identifier option from offer to request.\r | |
664 | //\r | |
665 | EfiStatus = find_opt (Offer, DHCP4_SERVER_IDENTIFIER, 0, &srvid);\r | |
666 | \r | |
667 | if (EFI_ERROR (EfiStatus)) {\r | |
668 | Private->callback = NULL;\r | |
669 | return EFI_INVALID_PARAMETER;\r | |
670 | }\r | |
671 | \r | |
672 | if (srvid->len != 4) {\r | |
673 | Private->callback = NULL;\r | |
674 | return EFI_INVALID_PARAMETER;\r | |
675 | }\r | |
676 | \r | |
677 | EfiStatus = add_opt (&request, srvid);\r | |
678 | \r | |
679 | if (EFI_ERROR (EfiStatus)) {\r | |
3aaddf92 | 680 | DEBUG ((EFI_D_ERROR, "%r\n", EfiStatus));\r |
878ddf1f | 681 | Private->callback = NULL;\r |
682 | return EfiStatus;\r | |
683 | }\r | |
684 | //\r | |
685 | // Add requested IP address option to request packet.\r | |
686 | //\r | |
687 | op = (DHCP4_OP *) buf;\r | |
688 | op->op = DHCP4_REQUESTED_IP_ADDRESS;\r | |
689 | op->len = 4;\r | |
690 | CopyMem (op->data, &Offer->dhcp4.yiaddr, 4);\r | |
691 | \r | |
692 | EfiStatus = add_opt (&request, op);\r | |
693 | \r | |
694 | if (EFI_ERROR (EfiStatus)) {\r | |
3aaddf92 | 695 | DEBUG ((EFI_D_ERROR, "%r\n", EfiStatus));\r |
878ddf1f | 696 | Private->callback = NULL;\r |
697 | return EfiStatus;\r | |
698 | }\r | |
699 | //\r | |
700 | // Transimit DHCP request and wait for DHCP ack...\r | |
701 | //\r | |
702 | SetMem (&bcast_ip, sizeof (EFI_IP_ADDRESS), 0xFF);\r | |
703 | \r | |
704 | EfiStatus = tx_rx_udp (\r | |
705 | Private,\r | |
706 | &bcast_ip,\r | |
707 | NULL,\r | |
708 | NULL,\r | |
709 | NULL,\r | |
710 | &request,\r | |
711 | &acknak,\r | |
712 | &acknak_verify,\r | |
713 | seconds_timeout\r | |
714 | );\r | |
715 | \r | |
716 | if (EFI_ERROR (EfiStatus)) {\r | |
3aaddf92 | 717 | DEBUG ((EFI_D_ERROR, "%r\n", EfiStatus));\r |
878ddf1f | 718 | Private->callback = NULL;\r |
719 | return EfiStatus;\r | |
720 | }\r | |
721 | //\r | |
722 | // Set Data->IsAck and return.\r | |
723 | //\r | |
724 | EfiStatus = find_opt (&acknak, DHCP4_MESSAGE_TYPE, 0, &op);\r | |
725 | \r | |
726 | if (EFI_ERROR (EfiStatus)) {\r | |
727 | Private->callback = NULL;\r | |
728 | return EFI_DEVICE_ERROR;\r | |
729 | }\r | |
730 | \r | |
731 | if (op->len != 1) {\r | |
732 | Private->callback = NULL;\r | |
733 | return EFI_DEVICE_ERROR;\r | |
734 | }\r | |
735 | \r | |
736 | switch (op->data[0]) {\r | |
737 | case DHCP4_MESSAGE_TYPE_ACK:\r | |
738 | This->Data->IsAck = TRUE;\r | |
739 | break;\r | |
740 | \r | |
741 | case DHCP4_MESSAGE_TYPE_NAK:\r | |
742 | This->Data->IsAck = FALSE;\r | |
743 | break;\r | |
744 | \r | |
745 | default:\r | |
746 | Private->callback = NULL;\r | |
747 | return EFI_DEVICE_ERROR;\r | |
748 | }\r | |
749 | //\r | |
750 | // Copy packets into instance data...\r | |
751 | //\r | |
752 | CopyMem (&This->Data->Offer, Offer, sizeof (DHCP4_PACKET));\r | |
753 | CopyMem (&This->Data->Request, &request, sizeof (DHCP4_PACKET));\r | |
754 | CopyMem (&This->Data->AckNak, &acknak, sizeof (DHCP4_PACKET));\r | |
755 | \r | |
756 | This->Data->SelectCompleted = TRUE;\r | |
757 | \r | |
758 | Private->callback = NULL;\r | |
759 | return EFI_SUCCESS;\r | |
760 | }\r | |
761 | \r | |
762 | /* eof - PxeDhcp4InitSelect.c */\r |