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772db4bb | 1 | /** @file\r |
3e8c18da | 2 | EFI DHCP protocol implementation.\r |
3 | \r | |
434ce3fe | 4 | Copyright (c) 2006 - 2009, Intel Corporation.<BR>\r |
772db4bb | 5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
772db4bb | 13 | **/\r |
14 | \r | |
15 | \r | |
16 | #include "Dhcp4Impl.h"\r | |
17 | \r | |
18 | UINT32 mDhcp4DefaultTimeout[4] = { 4, 8, 16, 32 };\r | |
19 | \r | |
20 | \r | |
21 | /**\r | |
22 | Send an initial DISCOVER or REQUEST message according to the\r | |
23 | DHCP service's current state.\r | |
24 | \r | |
3e8c18da | 25 | @param[in] DhcpSb The DHCP service instance\r |
772db4bb | 26 | \r |
27 | @retval EFI_SUCCESS The request has been sent\r | |
f9204641 | 28 | @retval other Some error occurs when sending the request.\r |
772db4bb | 29 | \r |
30 | **/\r | |
31 | EFI_STATUS\r | |
32 | DhcpInitRequest (\r | |
33 | IN DHCP_SERVICE *DhcpSb\r | |
34 | )\r | |
35 | {\r | |
36 | EFI_STATUS Status;\r | |
37 | \r | |
38 | ASSERT ((DhcpSb->DhcpState == Dhcp4Init) || (DhcpSb->DhcpState == Dhcp4InitReboot));\r | |
39 | \r | |
40 | if (DhcpSb->DhcpState == Dhcp4Init) {\r | |
41 | DhcpSetState (DhcpSb, Dhcp4Selecting, FALSE);\r | |
42 | Status = DhcpSendMessage (DhcpSb, NULL, NULL, DHCP_MSG_DISCOVER, NULL);\r | |
43 | \r | |
44 | if (EFI_ERROR (Status)) {\r | |
45 | DhcpSb->DhcpState = Dhcp4Init;\r | |
46 | return Status;\r | |
47 | }\r | |
772db4bb | 48 | } else {\r |
49 | DhcpSetState (DhcpSb, Dhcp4Rebooting, FALSE);\r | |
50 | Status = DhcpSendMessage (DhcpSb, NULL, NULL, DHCP_MSG_REQUEST, NULL);\r | |
51 | \r | |
52 | if (EFI_ERROR (Status)) {\r | |
53 | DhcpSb->DhcpState = Dhcp4InitReboot;\r | |
54 | return Status;\r | |
55 | }\r | |
56 | }\r | |
57 | \r | |
58 | return EFI_SUCCESS;\r | |
59 | }\r | |
60 | \r | |
61 | \r | |
62 | /**\r | |
63 | Call user provided callback function, and return the value the\r | |
64 | function returns. If the user doesn't provide a callback, a\r | |
65 | proper return value is selected to let the caller continue the\r | |
66 | normal process.\r | |
67 | \r | |
3e8c18da | 68 | @param[in] DhcpSb The DHCP service instance\r |
69 | @param[in] Event The event as defined in the spec\r | |
70 | @param[in] Packet The current packet trigger the event\r | |
71 | @param[out] NewPacket The user's return new packet\r | |
772db4bb | 72 | \r |
73 | @retval EFI_NOT_READY Direct the caller to continue collecting the offer.\r | |
74 | @retval EFI_SUCCESS The user function returns success.\r | |
75 | @retval EFI_ABORTED The user function ask it to abort.\r | |
76 | \r | |
77 | **/\r | |
772db4bb | 78 | EFI_STATUS\r |
79 | DhcpCallUser (\r | |
80 | IN DHCP_SERVICE *DhcpSb,\r | |
81 | IN EFI_DHCP4_EVENT Event,\r | |
82 | IN EFI_DHCP4_PACKET *Packet, OPTIONAL\r | |
83 | OUT EFI_DHCP4_PACKET **NewPacket OPTIONAL\r | |
84 | )\r | |
85 | {\r | |
86 | EFI_DHCP4_CONFIG_DATA *Config;\r | |
87 | EFI_STATUS Status;\r | |
88 | \r | |
89 | if (NewPacket != NULL) {\r | |
90 | *NewPacket = NULL;\r | |
91 | }\r | |
92 | \r | |
93 | //\r | |
94 | // If user doesn't provide the call back function, return the value\r | |
95 | // that directs the client to continue the normal process.\r | |
96 | // In Dhcp4Selecting EFI_SUCCESS tells the client to stop collecting\r | |
97 | // the offers and select a offer, EFI_NOT_READY tells the client to\r | |
98 | // collect more offers.\r | |
99 | //\r | |
100 | Config = &DhcpSb->ActiveConfig;\r | |
101 | \r | |
102 | if (Config->Dhcp4Callback == NULL) {\r | |
103 | if (Event == Dhcp4RcvdOffer) {\r | |
104 | return EFI_NOT_READY;\r | |
105 | }\r | |
106 | \r | |
107 | return EFI_SUCCESS;\r | |
108 | }\r | |
109 | \r | |
110 | Status = Config->Dhcp4Callback (\r | |
111 | &DhcpSb->ActiveChild->Dhcp4Protocol,\r | |
112 | Config->CallbackContext,\r | |
687a2e5f | 113 | (EFI_DHCP4_STATE) DhcpSb->DhcpState,\r |
772db4bb | 114 | Event,\r |
115 | Packet,\r | |
116 | NewPacket\r | |
117 | );\r | |
118 | \r | |
119 | //\r | |
120 | // User's callback should only return EFI_SUCCESS, EFI_NOT_READY,\r | |
121 | // and EFI_ABORTED. If it returns values other than those, assume\r | |
122 | // it to be EFI_ABORTED.\r | |
123 | //\r | |
124 | if ((Status == EFI_SUCCESS) || (Status == EFI_NOT_READY)) {\r | |
125 | return Status;\r | |
126 | }\r | |
127 | \r | |
128 | return EFI_ABORTED;\r | |
129 | }\r | |
130 | \r | |
131 | \r | |
132 | /**\r | |
133 | Notify the user about the operation result.\r | |
134 | \r | |
135 | @param DhcpSb DHCP service instance\r | |
f9204641 | 136 | @param Which Which notify function to signal\r |
772db4bb | 137 | \r |
772db4bb | 138 | **/\r |
139 | VOID\r | |
140 | DhcpNotifyUser (\r | |
141 | IN DHCP_SERVICE *DhcpSb,\r | |
142 | IN INTN Which\r | |
143 | )\r | |
144 | {\r | |
145 | DHCP_PROTOCOL *Child;\r | |
146 | \r | |
147 | if ((Child = DhcpSb->ActiveChild) == NULL) {\r | |
148 | return ;\r | |
149 | }\r | |
150 | \r | |
151 | if ((Child->CompletionEvent != NULL) &&\r | |
f9204641 | 152 | ((Which == DHCP_NOTIFY_COMPLETION) || (Which == DHCP_NOTIFY_ALL))\r |
153 | ) {\r | |
772db4bb | 154 | \r |
155 | gBS->SignalEvent (Child->CompletionEvent);\r | |
156 | Child->CompletionEvent = NULL;\r | |
157 | }\r | |
158 | \r | |
159 | if ((Child->RenewRebindEvent != NULL) &&\r | |
f9204641 | 160 | ((Which == DHCP_NOTIFY_RENEWREBIND) || (Which == DHCP_NOTIFY_ALL))\r |
161 | ) {\r | |
772db4bb | 162 | \r |
163 | gBS->SignalEvent (Child->RenewRebindEvent);\r | |
164 | Child->RenewRebindEvent = NULL;\r | |
165 | }\r | |
166 | }\r | |
167 | \r | |
168 | \r | |
169 | \r | |
170 | /**\r | |
171 | Set the DHCP state. If CallUser is true, it will try to notify\r | |
172 | the user before change the state by DhcpNotifyUser. It returns\r | |
173 | EFI_ABORTED if the user return EFI_ABORTED, otherwise, it returns\r | |
174 | EFI_SUCCESS. If CallUser is FALSE, it isn't necessary to test\r | |
175 | the return value of this function.\r | |
176 | \r | |
177 | @param DhcpSb The DHCP service instance\r | |
178 | @param State The new DHCP state to change to\r | |
179 | @param CallUser Whether we need to call user\r | |
180 | \r | |
181 | @retval EFI_SUCCESS The state is changed\r | |
182 | @retval EFI_ABORTED The user asks to abort the DHCP process.\r | |
183 | \r | |
184 | **/\r | |
185 | EFI_STATUS\r | |
186 | DhcpSetState (\r | |
f9204641 | 187 | IN OUT DHCP_SERVICE *DhcpSb,\r |
188 | IN INTN State,\r | |
189 | IN BOOLEAN CallUser\r | |
772db4bb | 190 | )\r |
191 | {\r | |
192 | EFI_STATUS Status;\r | |
193 | \r | |
194 | if (CallUser) {\r | |
195 | Status = EFI_SUCCESS;\r | |
196 | \r | |
197 | if (State == Dhcp4Renewing) {\r | |
198 | Status = DhcpCallUser (DhcpSb, Dhcp4EnterRenewing, NULL, NULL);\r | |
199 | \r | |
200 | } else if (State == Dhcp4Rebinding) {\r | |
201 | Status = DhcpCallUser (DhcpSb, Dhcp4EnterRebinding, NULL, NULL);\r | |
202 | \r | |
203 | } else if (State == Dhcp4Bound) {\r | |
204 | Status = DhcpCallUser (DhcpSb, Dhcp4BoundCompleted, NULL, NULL);\r | |
205 | \r | |
206 | }\r | |
207 | \r | |
208 | if (EFI_ERROR (Status)) {\r | |
209 | return Status;\r | |
210 | }\r | |
211 | }\r | |
212 | \r | |
213 | //\r | |
214 | // Update the retransmission timer during the state transition.\r | |
215 | // This will clear the retry count. This is also why the rule\r | |
216 | // first transit the state, then send packets.\r | |
217 | //\r | |
c4a62a12 | 218 | if (State == Dhcp4Selecting) {\r |
772db4bb | 219 | DhcpSb->MaxRetries = DhcpSb->ActiveConfig.DiscoverTryCount;\r |
220 | } else {\r | |
221 | DhcpSb->MaxRetries = DhcpSb->ActiveConfig.RequestTryCount;\r | |
222 | }\r | |
223 | \r | |
224 | if (DhcpSb->MaxRetries == 0) {\r | |
225 | DhcpSb->MaxRetries = 4;\r | |
226 | }\r | |
227 | \r | |
228 | DhcpSb->CurRetry = 0;\r | |
229 | DhcpSb->PacketToLive = 0;\r | |
434ce3fe | 230 | DhcpSb->LastTimeout = 0;\r |
772db4bb | 231 | DhcpSb->DhcpState = State;\r |
232 | return EFI_SUCCESS;\r | |
233 | }\r | |
234 | \r | |
235 | \r | |
236 | /**\r | |
237 | Set the retransmit timer for the packet. It will select from either\r | |
238 | the discover timeouts/request timeouts or the default timeout values.\r | |
239 | \r | |
240 | @param DhcpSb The DHCP service instance.\r | |
241 | \r | |
772db4bb | 242 | **/\r |
772db4bb | 243 | VOID\r |
244 | DhcpSetTransmitTimer (\r | |
f9204641 | 245 | IN OUT DHCP_SERVICE *DhcpSb\r |
772db4bb | 246 | )\r |
247 | {\r | |
248 | UINT32 *Times;\r | |
249 | \r | |
250 | ASSERT (DhcpSb->MaxRetries > DhcpSb->CurRetry);\r | |
251 | \r | |
c4a62a12 | 252 | if (DhcpSb->DhcpState == Dhcp4Selecting) {\r |
772db4bb | 253 | Times = DhcpSb->ActiveConfig.DiscoverTimeout;\r |
254 | } else {\r | |
255 | Times = DhcpSb->ActiveConfig.RequestTimeout;\r | |
256 | }\r | |
257 | \r | |
258 | if (Times == NULL) {\r | |
259 | Times = mDhcp4DefaultTimeout;\r | |
260 | }\r | |
261 | \r | |
262 | DhcpSb->PacketToLive = Times[DhcpSb->CurRetry];\r | |
434ce3fe | 263 | DhcpSb->LastTimeout = DhcpSb->PacketToLive;\r |
772db4bb | 264 | \r |
e234f7c4 | 265 | return;\r |
c4a62a12 | 266 | }\r |
772db4bb | 267 | \r |
268 | /**\r | |
269 | Compute the lease. If the server grants a permanent lease, just\r | |
270 | process it as a normal timeout value since the lease will last\r | |
271 | more than 100 years.\r | |
272 | \r | |
273 | @param DhcpSb The DHCP service instance\r | |
274 | @param Para The DHCP parameter extracted from the server's\r | |
3e8c18da | 275 | response. \r |
772db4bb | 276 | **/\r |
772db4bb | 277 | VOID\r |
278 | DhcpComputeLease (\r | |
f9204641 | 279 | IN OUT DHCP_SERVICE *DhcpSb,\r |
280 | IN DHCP_PARAMETER *Para\r | |
772db4bb | 281 | )\r |
282 | {\r | |
283 | ASSERT (Para != NULL);\r | |
284 | \r | |
285 | DhcpSb->Lease = Para->Lease;\r | |
286 | DhcpSb->T2 = Para->T2;\r | |
287 | DhcpSb->T1 = Para->T1;\r | |
288 | \r | |
289 | if (DhcpSb->Lease == 0) {\r | |
290 | DhcpSb->Lease = DHCP_DEFAULT_LEASE;\r | |
291 | }\r | |
292 | \r | |
293 | if ((DhcpSb->T2 == 0) || (DhcpSb->T2 >= Para->Lease)) {\r | |
294 | DhcpSb->T2 = Para->Lease - (Para->Lease >> 3);\r | |
295 | }\r | |
296 | \r | |
297 | if ((DhcpSb->T1 == 0) || (DhcpSb->T1 >= Para->T2)) {\r | |
298 | DhcpSb->T1 = DhcpSb->Lease >> 1;\r | |
299 | }\r | |
300 | }\r | |
301 | \r | |
302 | \r | |
303 | /**\r | |
304 | Configure a UDP IO port to use the acquired lease address.\r | |
305 | DHCP driver needs this port to unicast packet to the server\r | |
306 | such as DHCP release.\r | |
307 | \r | |
3e8c18da | 308 | @param[in] UdpIo The UDP IO port to configure\r |
309 | @param[in] Context Dhcp service instance.\r | |
772db4bb | 310 | \r |
311 | @retval EFI_SUCCESS The UDP IO port is successfully configured.\r | |
312 | @retval Others It failed to configure the port.\r | |
313 | \r | |
314 | **/\r | |
315 | EFI_STATUS\r | |
316 | DhcpConfigLeaseIoPort (\r | |
317 | IN UDP_IO_PORT *UdpIo,\r | |
318 | IN VOID *Context\r | |
319 | )\r | |
320 | {\r | |
321 | EFI_UDP4_CONFIG_DATA UdpConfigData;\r | |
322 | EFI_IPv4_ADDRESS Subnet;\r | |
323 | EFI_IPv4_ADDRESS Gateway;\r | |
324 | DHCP_SERVICE *DhcpSb;\r | |
325 | EFI_STATUS Status;\r | |
326 | IP4_ADDR Ip;\r | |
327 | \r | |
328 | DhcpSb = (DHCP_SERVICE *) Context;\r | |
329 | \r | |
330 | UdpConfigData.AcceptBroadcast = FALSE;\r | |
331 | UdpConfigData.AcceptPromiscuous = FALSE;\r | |
332 | UdpConfigData.AcceptAnyPort = FALSE;\r | |
333 | UdpConfigData.AllowDuplicatePort = TRUE;\r | |
334 | UdpConfigData.TypeOfService = 0;\r | |
335 | UdpConfigData.TimeToLive = 64;\r | |
336 | UdpConfigData.DoNotFragment = FALSE;\r | |
337 | UdpConfigData.ReceiveTimeout = 1;\r | |
338 | UdpConfigData.TransmitTimeout = 0;\r | |
339 | \r | |
340 | UdpConfigData.UseDefaultAddress = FALSE;\r | |
341 | UdpConfigData.StationPort = DHCP_CLIENT_PORT;\r | |
342 | UdpConfigData.RemotePort = DHCP_SERVER_PORT;\r | |
343 | \r | |
344 | Ip = HTONL (DhcpSb->ClientAddr);\r | |
e48e37fc | 345 | CopyMem (&UdpConfigData.StationAddress, &Ip, sizeof (EFI_IPv4_ADDRESS));\r |
772db4bb | 346 | \r |
347 | Ip = HTONL (DhcpSb->Netmask);\r | |
e48e37fc | 348 | CopyMem (&UdpConfigData.SubnetMask, &Ip, sizeof (EFI_IPv4_ADDRESS));\r |
772db4bb | 349 | \r |
e48e37fc | 350 | ZeroMem (&UdpConfigData.RemoteAddress, sizeof (EFI_IPv4_ADDRESS));\r |
772db4bb | 351 | \r |
352 | Status = UdpIo->Udp->Configure (UdpIo->Udp, &UdpConfigData);\r | |
353 | \r | |
354 | if (EFI_ERROR (Status)) {\r | |
355 | return Status;\r | |
356 | }\r | |
357 | \r | |
358 | //\r | |
359 | // Add a default route if received from the server.\r | |
360 | //\r | |
361 | if ((DhcpSb->Para != NULL) && (DhcpSb->Para->Router != 0)) {\r | |
e48e37fc | 362 | ZeroMem (&Subnet, sizeof (EFI_IPv4_ADDRESS));\r |
772db4bb | 363 | \r |
364 | Ip = HTONL (DhcpSb->Para->Router);\r | |
e48e37fc | 365 | CopyMem (&Gateway, &Ip, sizeof (EFI_IPv4_ADDRESS));\r |
772db4bb | 366 | \r |
367 | UdpIo->Udp->Routes (UdpIo->Udp, FALSE, &Subnet, &Subnet, &Gateway);\r | |
368 | }\r | |
369 | \r | |
370 | return EFI_SUCCESS;\r | |
371 | }\r | |
372 | \r | |
373 | \r | |
374 | /**\r | |
375 | Update the lease states when a new lease is acquired. It will not only\r | |
376 | save the acquired the address and lease time, it will also create a UDP\r | |
377 | child to provide address resolution for the address.\r | |
378 | \r | |
379 | @param DhcpSb The DHCP service instance\r | |
380 | \r | |
381 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resources.\r | |
382 | @retval EFI_SUCCESS The lease is recorded.\r | |
383 | \r | |
384 | **/\r | |
772db4bb | 385 | EFI_STATUS\r |
386 | DhcpLeaseAcquired (\r | |
f9204641 | 387 | IN OUT DHCP_SERVICE *DhcpSb\r |
772db4bb | 388 | )\r |
389 | {\r | |
390 | INTN Class;\r | |
391 | \r | |
392 | DhcpSb->ClientAddr = EFI_NTOHL (DhcpSb->Selected->Dhcp4.Header.YourAddr);\r | |
393 | \r | |
394 | if (DhcpSb->Para != NULL) {\r | |
395 | DhcpSb->Netmask = DhcpSb->Para->NetMask;\r | |
396 | DhcpSb->ServerAddr = DhcpSb->Para->ServerId;\r | |
397 | }\r | |
398 | \r | |
399 | if (DhcpSb->Netmask == 0) {\r | |
400 | Class = NetGetIpClass (DhcpSb->ClientAddr);\r | |
2a86ff1c | 401 | DhcpSb->Netmask = gIp4AllMasks[Class << 3];\r |
772db4bb | 402 | }\r |
403 | \r | |
404 | if (DhcpSb->LeaseIoPort != NULL) {\r | |
405 | UdpIoFreePort (DhcpSb->LeaseIoPort);\r | |
406 | }\r | |
407 | \r | |
408 | //\r | |
409 | // Create a UDP/IP child to provide ARP service for the Leased IP,\r | |
410 | // and transmit unicast packet with it as source address. Don't\r | |
411 | // start receive on this port, the queued packet will be timeout.\r | |
412 | //\r | |
413 | DhcpSb->LeaseIoPort = UdpIoCreatePort (\r | |
414 | DhcpSb->Controller,\r | |
415 | DhcpSb->Image,\r | |
416 | DhcpConfigLeaseIoPort,\r | |
417 | DhcpSb\r | |
418 | );\r | |
419 | \r | |
420 | if (DhcpSb->LeaseIoPort == NULL) {\r | |
421 | return EFI_OUT_OF_RESOURCES;\r | |
422 | }\r | |
423 | \r | |
424 | if (!DHCP_IS_BOOTP (DhcpSb->Para)) {\r | |
425 | DhcpComputeLease (DhcpSb, DhcpSb->Para);\r | |
426 | }\r | |
427 | \r | |
428 | return DhcpSetState (DhcpSb, Dhcp4Bound, TRUE);\r | |
429 | }\r | |
430 | \r | |
431 | \r | |
432 | /**\r | |
433 | Clean up the DHCP related states, IoStatus isn't reset.\r | |
434 | \r | |
435 | @param DhcpSb The DHCP instance service.\r | |
436 | \r | |
772db4bb | 437 | **/\r |
438 | VOID\r | |
439 | DhcpCleanLease (\r | |
440 | IN DHCP_SERVICE *DhcpSb\r | |
441 | )\r | |
442 | {\r | |
443 | DhcpSb->DhcpState = Dhcp4Init;\r | |
444 | DhcpSb->Xid = DhcpSb->Xid + 1;\r | |
445 | DhcpSb->ClientAddr = 0;\r | |
c5bcc2e2 | 446 | DhcpSb->Netmask = 0;\r |
772db4bb | 447 | DhcpSb->ServerAddr = 0;\r |
448 | \r | |
449 | if (DhcpSb->LastOffer != NULL) {\r | |
a4df47f1 | 450 | FreePool (DhcpSb->LastOffer);\r |
772db4bb | 451 | DhcpSb->LastOffer = NULL;\r |
452 | }\r | |
453 | \r | |
454 | if (DhcpSb->Selected != NULL) {\r | |
a4df47f1 | 455 | FreePool (DhcpSb->Selected);\r |
772db4bb | 456 | DhcpSb->Selected = NULL;\r |
457 | }\r | |
458 | \r | |
459 | if (DhcpSb->Para != NULL) {\r | |
a4df47f1 | 460 | FreePool (DhcpSb->Para);\r |
772db4bb | 461 | DhcpSb->Para = NULL;\r |
462 | }\r | |
463 | \r | |
464 | DhcpSb->Lease = 0;\r | |
465 | DhcpSb->T1 = 0;\r | |
466 | DhcpSb->T2 = 0;\r | |
467 | DhcpSb->ExtraRefresh = FALSE;\r | |
468 | \r | |
469 | if (DhcpSb->LeaseIoPort != NULL) {\r | |
470 | UdpIoFreePort (DhcpSb->LeaseIoPort);\r | |
471 | DhcpSb->LeaseIoPort = NULL;\r | |
472 | }\r | |
473 | \r | |
474 | if (DhcpSb->LastPacket != NULL) {\r | |
434ce3fe | 475 | FreePool (DhcpSb->LastPacket);\r |
772db4bb | 476 | DhcpSb->LastPacket = NULL;\r |
477 | }\r | |
478 | \r | |
479 | DhcpSb->PacketToLive = 0;\r | |
434ce3fe | 480 | DhcpSb->LastTimeout = 0;\r |
772db4bb | 481 | DhcpSb->CurRetry = 0;\r |
482 | DhcpSb->MaxRetries = 0;\r | |
772db4bb | 483 | DhcpSb->LeaseLife = 0;\r |
484 | }\r | |
485 | \r | |
486 | \r | |
487 | /**\r | |
488 | Select a offer among all the offers collected. If the offer selected is\r | |
489 | of BOOTP, the lease is recorded and user notified. If the offer is of\r | |
490 | DHCP, it will request the offer from the server.\r | |
491 | \r | |
3e8c18da | 492 | @param[in] DhcpSb The DHCP service instance.\r |
772db4bb | 493 | \r |
494 | @retval EFI_SUCCESS One of the offer is selected.\r | |
495 | \r | |
496 | **/\r | |
772db4bb | 497 | EFI_STATUS\r |
498 | DhcpChooseOffer (\r | |
499 | IN DHCP_SERVICE *DhcpSb\r | |
500 | )\r | |
501 | {\r | |
502 | EFI_DHCP4_PACKET *Selected;\r | |
503 | EFI_DHCP4_PACKET *NewPacket;\r | |
c4a62a12 | 504 | EFI_DHCP4_PACKET *TempPacket;\r |
772db4bb | 505 | EFI_STATUS Status;\r |
506 | \r | |
507 | ASSERT (DhcpSb->LastOffer != NULL);\r | |
508 | \r | |
772db4bb | 509 | //\r |
510 | // User will cache previous offers if he wants to select\r | |
511 | // from multiple offers. If user provides an invalid packet,\r | |
512 | // use the last offer, otherwise use the provided packet.\r | |
513 | //\r | |
514 | NewPacket = NULL;\r | |
515 | Status = DhcpCallUser (DhcpSb, Dhcp4SelectOffer, DhcpSb->LastOffer, &NewPacket);\r | |
516 | \r | |
517 | if (EFI_ERROR (Status)) {\r | |
518 | return Status;\r | |
519 | }\r | |
520 | \r | |
521 | Selected = DhcpSb->LastOffer;\r | |
522 | \r | |
c4a62a12 | 523 | if ((NewPacket != NULL) && !EFI_ERROR (DhcpValidateOptions (NewPacket, NULL))) {\r |
e48e37fc | 524 | TempPacket = (EFI_DHCP4_PACKET *) AllocatePool (NewPacket->Size);\r |
c4a62a12 | 525 | if (TempPacket != NULL) {\r |
e48e37fc | 526 | CopyMem (TempPacket, NewPacket, NewPacket->Size);\r |
527 | gBS->FreePool (Selected);\r | |
c4a62a12 | 528 | Selected = TempPacket;\r |
772db4bb | 529 | }\r |
530 | }\r | |
531 | \r | |
532 | DhcpSb->Selected = Selected;\r | |
533 | DhcpSb->LastOffer = NULL;\r | |
534 | DhcpSb->Para = NULL;\r | |
535 | DhcpValidateOptions (Selected, &DhcpSb->Para);\r | |
536 | \r | |
537 | //\r | |
538 | // A bootp offer has been selected, save the lease status,\r | |
539 | // enter bound state then notify the user.\r | |
540 | //\r | |
541 | if (DHCP_IS_BOOTP (DhcpSb->Para)) {\r | |
542 | Status = DhcpLeaseAcquired (DhcpSb);\r | |
543 | \r | |
544 | if (EFI_ERROR (Status)) {\r | |
545 | return Status;\r | |
546 | }\r | |
547 | \r | |
548 | DhcpSb->IoStatus = EFI_SUCCESS;\r | |
549 | DhcpNotifyUser (DhcpSb, DHCP_NOTIFY_ALL);\r | |
550 | return EFI_SUCCESS;\r | |
551 | }\r | |
552 | \r | |
553 | //\r | |
554 | // Send a DHCP requests\r | |
555 | //\r | |
556 | Status = DhcpSetState (DhcpSb, Dhcp4Requesting, TRUE);\r | |
557 | \r | |
558 | if (EFI_ERROR (Status)) {\r | |
559 | return Status;\r | |
560 | }\r | |
561 | \r | |
562 | return DhcpSendMessage (DhcpSb, Selected, DhcpSb->Para, DHCP_MSG_REQUEST, NULL);\r | |
563 | }\r | |
564 | \r | |
565 | \r | |
566 | /**\r | |
567 | Terminate the current address acquire. All the allocated resources\r | |
568 | are released. Be careful when calling this function. A rule related\r | |
569 | to this is: only call DhcpEndSession at the highest level, such as\r | |
570 | DhcpInput, DhcpOnTimerTick...At the other level, just return error.\r | |
571 | \r | |
3e8c18da | 572 | @param[in] DhcpSb The DHCP service instance\r |
573 | @param[in] Status The result of the DHCP process.\r | |
772db4bb | 574 | \r |
575 | **/\r | |
772db4bb | 576 | VOID\r |
577 | DhcpEndSession (\r | |
578 | IN DHCP_SERVICE *DhcpSb,\r | |
579 | IN EFI_STATUS Status\r | |
580 | )\r | |
581 | {\r | |
582 | if (DHCP_CONNECTED (DhcpSb->DhcpState)) {\r | |
583 | DhcpCallUser (DhcpSb, Dhcp4AddressLost, NULL, NULL);\r | |
584 | } else {\r | |
585 | DhcpCallUser (DhcpSb, Dhcp4Fail, NULL, NULL);\r | |
586 | }\r | |
587 | \r | |
588 | DhcpCleanLease (DhcpSb);\r | |
589 | \r | |
590 | DhcpSb->IoStatus = Status;\r | |
591 | DhcpNotifyUser (DhcpSb, DHCP_NOTIFY_ALL);\r | |
592 | }\r | |
593 | \r | |
594 | \r | |
595 | /**\r | |
596 | Handle packets in DHCP select state.\r | |
597 | \r | |
3e8c18da | 598 | @param[in] DhcpSb The DHCP service instance\r |
599 | @param[in] Packet The DHCP packet received\r | |
600 | @param[in] Para The DHCP parameter extracted from the packet. That\r | |
601 | is, all the option value that we care.\r | |
772db4bb | 602 | \r |
603 | @retval EFI_SUCCESS The packet is successfully processed.\r | |
604 | @retval Others Some error occured.\r | |
605 | \r | |
606 | **/\r | |
772db4bb | 607 | EFI_STATUS\r |
608 | DhcpHandleSelect (\r | |
609 | IN DHCP_SERVICE *DhcpSb,\r | |
610 | IN EFI_DHCP4_PACKET *Packet,\r | |
611 | IN DHCP_PARAMETER *Para\r | |
612 | )\r | |
613 | {\r | |
772db4bb | 614 | EFI_STATUS Status;\r |
615 | \r | |
616 | Status = EFI_SUCCESS;\r | |
617 | \r | |
618 | //\r | |
619 | // First validate the message:\r | |
620 | // 1. the offer is a unicast\r | |
621 | // 2. if it is a DHCP message, it must contains a server ID.\r | |
622 | // Don't return a error for these two case otherwise the session is ended.\r | |
623 | //\r | |
772db4bb | 624 | if (!DHCP_IS_BOOTP (Para) &&\r |
f9204641 | 625 | ((Para->DhcpType != DHCP_MSG_OFFER) || (Para->ServerId == 0))\r |
626 | ) {\r | |
772db4bb | 627 | goto ON_EXIT;\r |
628 | }\r | |
629 | \r | |
630 | //\r | |
631 | // Call the user's callback. The action according to the return is as:\r | |
632 | // 1. EFI_SUCESS: stop waiting for more offers, select the offer now\r | |
633 | // 2. EFI_NOT_READY: wait for more offers\r | |
634 | // 3. EFI_ABORTED: abort the address acquiring.\r | |
635 | //\r | |
636 | Status = DhcpCallUser (DhcpSb, Dhcp4RcvdOffer, Packet, NULL);\r | |
637 | \r | |
638 | if (Status == EFI_SUCCESS) {\r | |
639 | if (DhcpSb->LastOffer != NULL) {\r | |
a4df47f1 | 640 | FreePool (DhcpSb->LastOffer);\r |
772db4bb | 641 | }\r |
642 | \r | |
643 | DhcpSb->LastOffer = Packet;\r | |
644 | \r | |
645 | return DhcpChooseOffer (DhcpSb);\r | |
646 | \r | |
647 | } else if (Status == EFI_NOT_READY) {\r | |
648 | if (DhcpSb->LastOffer != NULL) {\r | |
a4df47f1 | 649 | FreePool (DhcpSb->LastOffer);\r |
772db4bb | 650 | }\r |
651 | \r | |
652 | DhcpSb->LastOffer = Packet;\r | |
653 | \r | |
654 | } else if (Status == EFI_ABORTED) {\r | |
655 | //\r | |
656 | // DhcpInput will end the session upon error return. Remember\r | |
657 | // only to call DhcpEndSession at the top level call.\r | |
658 | //\r | |
659 | goto ON_EXIT;\r | |
660 | }\r | |
661 | \r | |
662 | return EFI_SUCCESS;\r | |
663 | \r | |
664 | ON_EXIT:\r | |
e48e37fc | 665 | gBS->FreePool (Packet);\r |
772db4bb | 666 | return Status;\r |
667 | }\r | |
668 | \r | |
669 | \r | |
670 | /**\r | |
671 | Handle packets in DHCP request state.\r | |
672 | \r | |
3e8c18da | 673 | @param[in] DhcpSb The DHCP service instance\r |
674 | @param[in] Packet The DHCP packet received\r | |
675 | @param[in] Para The DHCP parameter extracted from the packet. That\r | |
676 | is, all the option value that we care.\r | |
772db4bb | 677 | \r |
678 | @retval EFI_SUCCESS The packet is successfully processed.\r | |
679 | @retval Others Some error occured.\r | |
680 | \r | |
681 | **/\r | |
772db4bb | 682 | EFI_STATUS\r |
683 | DhcpHandleRequest (\r | |
684 | IN DHCP_SERVICE *DhcpSb,\r | |
685 | IN EFI_DHCP4_PACKET *Packet,\r | |
686 | IN DHCP_PARAMETER *Para\r | |
687 | )\r | |
688 | {\r | |
689 | EFI_DHCP4_HEADER *Head;\r | |
690 | EFI_DHCP4_HEADER *Selected;\r | |
691 | EFI_STATUS Status;\r | |
692 | UINT8 *Message;\r | |
693 | \r | |
694 | ASSERT (!DHCP_IS_BOOTP (DhcpSb->Para));\r | |
695 | \r | |
696 | Head = &Packet->Dhcp4.Header;\r | |
697 | Selected = &DhcpSb->Selected->Dhcp4.Header;\r | |
698 | \r | |
699 | //\r | |
700 | // Ignore the BOOTP message and DHCP messages other than DHCP ACK/NACK.\r | |
701 | //\r | |
702 | if (DHCP_IS_BOOTP (Para) ||\r | |
f9204641 | 703 | (Para->ServerId != DhcpSb->Para->ServerId) ||\r |
704 | ((Para->DhcpType != DHCP_MSG_ACK) && (Para->DhcpType != DHCP_MSG_NAK))\r | |
705 | ) {\r | |
772db4bb | 706 | \r |
707 | Status = EFI_SUCCESS;\r | |
708 | goto ON_EXIT;\r | |
709 | }\r | |
710 | \r | |
711 | //\r | |
712 | // Received a NAK, end the session no matter what the user returns\r | |
713 | //\r | |
714 | Status = EFI_DEVICE_ERROR;\r | |
715 | \r | |
716 | if (Para->DhcpType == DHCP_MSG_NAK) {\r | |
717 | DhcpCallUser (DhcpSb, Dhcp4RcvdNak, Packet, NULL);\r | |
718 | goto ON_EXIT;\r | |
719 | }\r | |
720 | \r | |
721 | //\r | |
722 | // Check whether the ACK matches the selected offer\r | |
723 | //\r | |
724 | Message = NULL;\r | |
725 | \r | |
84b5c78e | 726 | if (!EFI_IP4_EQUAL (&Head->YourAddr, &Selected->YourAddr)) {\r |
67a58d0f | 727 | Message = (UINT8 *) "Lease confirmed isn't the same as that in the offer";\r |
772db4bb | 728 | goto REJECT;\r |
729 | }\r | |
730 | \r | |
731 | Status = DhcpCallUser (DhcpSb, Dhcp4RcvdAck, Packet, NULL);\r | |
732 | \r | |
733 | if (EFI_ERROR (Status)) {\r | |
67a58d0f | 734 | Message = (UINT8 *) "Lease is denied upon received ACK";\r |
772db4bb | 735 | goto REJECT;\r |
736 | }\r | |
737 | \r | |
738 | //\r | |
739 | // Record the lease, transit to BOUND state, then notify the user\r | |
740 | //\r | |
741 | Status = DhcpLeaseAcquired (DhcpSb);\r | |
742 | \r | |
743 | if (EFI_ERROR (Status)) {\r | |
67a58d0f | 744 | Message = (UINT8 *) "Lease is denied upon entering bound";\r |
772db4bb | 745 | goto REJECT;\r |
746 | }\r | |
747 | \r | |
748 | DhcpSb->IoStatus = EFI_SUCCESS;\r | |
749 | DhcpNotifyUser (DhcpSb, DHCP_NOTIFY_COMPLETION);\r | |
750 | \r | |
e48e37fc | 751 | gBS->FreePool (Packet);\r |
772db4bb | 752 | return EFI_SUCCESS;\r |
753 | \r | |
754 | REJECT:\r | |
755 | DhcpSendMessage (DhcpSb, DhcpSb->Selected, DhcpSb->Para, DHCP_MSG_DECLINE, Message);\r | |
756 | \r | |
757 | ON_EXIT:\r | |
e48e37fc | 758 | gBS->FreePool (Packet);\r |
772db4bb | 759 | return Status;\r |
760 | }\r | |
761 | \r | |
762 | \r | |
763 | /**\r | |
764 | Handle packets in DHCP renew/rebound state.\r | |
765 | \r | |
3e8c18da | 766 | @param[in] DhcpSb The DHCP service instance\r |
767 | @param[in] Packet The DHCP packet received\r | |
768 | @param[in] Para The DHCP parameter extracted from the packet. That\r | |
769 | is, all the option value that we care.\r | |
772db4bb | 770 | \r |
771 | @retval EFI_SUCCESS The packet is successfully processed.\r | |
772 | @retval Others Some error occured.\r | |
773 | \r | |
774 | **/\r | |
772db4bb | 775 | EFI_STATUS\r |
776 | DhcpHandleRenewRebind (\r | |
777 | IN DHCP_SERVICE *DhcpSb,\r | |
778 | IN EFI_DHCP4_PACKET *Packet,\r | |
779 | IN DHCP_PARAMETER *Para\r | |
780 | )\r | |
781 | {\r | |
782 | EFI_DHCP4_HEADER *Head;\r | |
783 | EFI_DHCP4_HEADER *Selected;\r | |
784 | EFI_STATUS Status;\r | |
785 | \r | |
786 | ASSERT (!DHCP_IS_BOOTP (DhcpSb->Para));\r | |
787 | \r | |
788 | Head = &Packet->Dhcp4.Header;\r | |
789 | Selected = &DhcpSb->Selected->Dhcp4.Header;\r | |
790 | \r | |
791 | //\r | |
792 | // Ignore the BOOTP message and DHCP messages other than DHCP ACK/NACK\r | |
793 | //\r | |
794 | if (DHCP_IS_BOOTP (Para) ||\r | |
f9204641 | 795 | (Para->ServerId != DhcpSb->Para->ServerId) ||\r |
796 | ((Para->DhcpType != DHCP_MSG_ACK) && (Para->DhcpType != DHCP_MSG_NAK))\r | |
797 | ) {\r | |
772db4bb | 798 | \r |
799 | Status = EFI_SUCCESS;\r | |
800 | goto ON_EXIT;\r | |
801 | }\r | |
802 | \r | |
803 | //\r | |
804 | // Received a NAK, ignore the user's return then terminate the process\r | |
805 | //\r | |
806 | Status = EFI_DEVICE_ERROR;\r | |
807 | \r | |
808 | if (Para->DhcpType == DHCP_MSG_NAK) {\r | |
809 | DhcpCallUser (DhcpSb, Dhcp4RcvdNak, Packet, NULL);\r | |
810 | goto ON_EXIT;\r | |
811 | }\r | |
812 | \r | |
813 | //\r | |
814 | // The lease is different from the selected. Don't send a DECLINE\r | |
815 | // since it isn't existed in the client's FSM.\r | |
816 | //\r | |
84b5c78e | 817 | if (!EFI_IP4_EQUAL (&Head->YourAddr, &Selected->YourAddr)) {\r |
772db4bb | 818 | goto ON_EXIT;\r |
819 | }\r | |
820 | \r | |
821 | Status = DhcpCallUser (DhcpSb, Dhcp4RcvdAck, Packet, NULL);\r | |
822 | \r | |
823 | if (EFI_ERROR (Status)) {\r | |
824 | goto ON_EXIT;\r | |
825 | }\r | |
826 | \r | |
827 | //\r | |
828 | // Record the lease, start timer for T1 and T2,\r | |
829 | //\r | |
830 | DhcpComputeLease (DhcpSb, Para);\r | |
831 | DhcpSb->LeaseLife = 0;\r | |
832 | DhcpSetState (DhcpSb, Dhcp4Bound, TRUE);\r | |
833 | \r | |
7bce0c5a | 834 | if (DhcpSb->ExtraRefresh != 0) {\r |
772db4bb | 835 | DhcpSb->ExtraRefresh = FALSE;\r |
836 | \r | |
837 | DhcpSb->IoStatus = EFI_SUCCESS;\r | |
838 | DhcpNotifyUser (DhcpSb, DHCP_NOTIFY_RENEWREBIND);\r | |
839 | }\r | |
840 | \r | |
841 | ON_EXIT:\r | |
e48e37fc | 842 | gBS->FreePool (Packet);\r |
772db4bb | 843 | return Status;\r |
844 | }\r | |
845 | \r | |
846 | \r | |
847 | /**\r | |
848 | Handle packets in DHCP reboot state.\r | |
849 | \r | |
3e8c18da | 850 | @param[in] DhcpSb The DHCP service instance\r |
851 | @param[in] Packet The DHCP packet received\r | |
852 | @param[in] Para The DHCP parameter extracted from the packet. That\r | |
853 | is, all the option value that we care.\r | |
772db4bb | 854 | \r |
855 | @retval EFI_SUCCESS The packet is successfully processed.\r | |
856 | @retval Others Some error occured.\r | |
857 | \r | |
858 | **/\r | |
772db4bb | 859 | EFI_STATUS\r |
860 | DhcpHandleReboot (\r | |
861 | IN DHCP_SERVICE *DhcpSb,\r | |
862 | IN EFI_DHCP4_PACKET *Packet,\r | |
863 | IN DHCP_PARAMETER *Para\r | |
864 | )\r | |
865 | {\r | |
866 | EFI_DHCP4_HEADER *Head;\r | |
867 | EFI_STATUS Status;\r | |
868 | \r | |
869 | Head = &Packet->Dhcp4.Header;\r | |
870 | \r | |
871 | //\r | |
872 | // Ignore the BOOTP message and DHCP messages other than DHCP ACK/NACK\r | |
873 | //\r | |
874 | if (DHCP_IS_BOOTP (Para) ||\r | |
f9204641 | 875 | ((Para->DhcpType != DHCP_MSG_ACK) && (Para->DhcpType != DHCP_MSG_NAK))\r |
876 | ) {\r | |
772db4bb | 877 | \r |
878 | Status = EFI_SUCCESS;\r | |
879 | goto ON_EXIT;\r | |
880 | }\r | |
881 | \r | |
882 | //\r | |
883 | // If a NAK is received, transit to INIT and try again.\r | |
884 | //\r | |
885 | if (Para->DhcpType == DHCP_MSG_NAK) {\r | |
886 | DhcpCallUser (DhcpSb, Dhcp4RcvdNak, Packet, NULL);\r | |
887 | \r | |
888 | DhcpSb->ClientAddr = 0;\r | |
889 | DhcpSb->DhcpState = Dhcp4Init;\r | |
890 | \r | |
891 | Status = DhcpInitRequest (DhcpSb);\r | |
892 | goto ON_EXIT;\r | |
893 | }\r | |
894 | \r | |
895 | //\r | |
896 | // Check whether the ACK matches the selected offer\r | |
897 | //\r | |
898 | if (EFI_NTOHL (Head->YourAddr) != DhcpSb->ClientAddr) {\r | |
899 | Status = EFI_DEVICE_ERROR;\r | |
900 | goto ON_EXIT;\r | |
901 | }\r | |
902 | \r | |
903 | Status = DhcpCallUser (DhcpSb, Dhcp4RcvdAck, Packet, NULL);\r | |
904 | if (EFI_ERROR (Status)) {\r | |
905 | goto ON_EXIT;\r | |
906 | }\r | |
907 | \r | |
908 | //\r | |
909 | // OK, get the parameter from server, record the lease\r | |
910 | //\r | |
a4df47f1 | 911 | DhcpSb->Para = AllocateCopyPool (sizeof (DHCP_PARAMETER), Para);\r |
772db4bb | 912 | if (DhcpSb->Para == NULL) {\r |
913 | Status = EFI_OUT_OF_RESOURCES;\r | |
914 | goto ON_EXIT;\r | |
915 | }\r | |
916 | \r | |
917 | DhcpSb->Selected = Packet;\r | |
772db4bb | 918 | Status = DhcpLeaseAcquired (DhcpSb);\r |
772db4bb | 919 | if (EFI_ERROR (Status)) {\r |
920 | return Status;\r | |
921 | }\r | |
922 | \r | |
923 | DhcpSb->IoStatus = EFI_SUCCESS;\r | |
924 | DhcpNotifyUser (DhcpSb, DHCP_NOTIFY_COMPLETION);\r | |
925 | return EFI_SUCCESS;\r | |
926 | \r | |
927 | ON_EXIT:\r | |
e48e37fc | 928 | gBS->FreePool (Packet);\r |
772db4bb | 929 | return Status;\r |
930 | }\r | |
931 | \r | |
932 | \r | |
933 | /**\r | |
f9204641 | 934 | Handle the received DHCP packets. This function drives the DHCP\r |
772db4bb | 935 | state machine.\r |
936 | \r | |
937 | @param UdpPacket The UDP packets received.\r | |
938 | @param Points The local/remote UDP access points\r | |
939 | @param IoStatus The status of the UDP receive\r | |
940 | @param Context The opaque parameter to the function.\r | |
941 | \r | |
772db4bb | 942 | **/\r |
943 | VOID\r | |
944 | DhcpInput (\r | |
945 | NET_BUF *UdpPacket,\r | |
946 | UDP_POINTS *Points,\r | |
947 | EFI_STATUS IoStatus,\r | |
948 | VOID *Context\r | |
949 | )\r | |
950 | {\r | |
951 | DHCP_SERVICE *DhcpSb;\r | |
952 | EFI_DHCP4_HEADER *Head;\r | |
953 | EFI_DHCP4_PACKET *Packet;\r | |
954 | DHCP_PARAMETER *Para;\r | |
955 | EFI_STATUS Status;\r | |
956 | UINT32 Len;\r | |
957 | \r | |
958 | Packet = NULL;\r | |
959 | DhcpSb = (DHCP_SERVICE *) Context;\r | |
960 | \r | |
961 | //\r | |
962 | // Don't restart receive if error occurs or DHCP is destoried.\r | |
963 | //\r | |
964 | if (EFI_ERROR (IoStatus)) {\r | |
965 | return ;\r | |
966 | } else if (DhcpSb->ServiceState == DHCP_DESTORY) {\r | |
967 | NetbufFree (UdpPacket);\r | |
968 | return ;\r | |
969 | }\r | |
970 | \r | |
971 | ASSERT (UdpPacket != NULL);\r | |
972 | \r | |
973 | if (DhcpSb->DhcpState == Dhcp4Stopped) {\r | |
974 | goto RESTART;\r | |
975 | }\r | |
976 | \r | |
977 | //\r | |
978 | // Validate the packet received\r | |
979 | //\r | |
980 | if (UdpPacket->TotalSize < sizeof (EFI_DHCP4_HEADER)) {\r | |
981 | goto RESTART;\r | |
982 | }\r | |
983 | \r | |
984 | //\r | |
985 | // Copy the DHCP message to a continuous memory block\r | |
986 | //\r | |
987 | Len = sizeof (EFI_DHCP4_PACKET) + UdpPacket->TotalSize - sizeof (EFI_DHCP4_HEADER);\r | |
e48e37fc | 988 | Packet = (EFI_DHCP4_PACKET *) AllocatePool (Len);\r |
772db4bb | 989 | \r |
990 | if (Packet == NULL) {\r | |
991 | goto RESTART;\r | |
992 | }\r | |
993 | \r | |
994 | Packet->Size = Len;\r | |
995 | Head = &Packet->Dhcp4.Header;\r | |
996 | Packet->Length = NetbufCopy (UdpPacket, 0, UdpPacket->TotalSize, (UINT8 *) Head);\r | |
997 | \r | |
998 | if (Packet->Length != UdpPacket->TotalSize) {\r | |
999 | goto RESTART;\r | |
1000 | }\r | |
1001 | \r | |
1002 | //\r | |
1003 | // Is this packet the answer to our packet?\r | |
1004 | //\r | |
1005 | if ((Head->OpCode != BOOTP_REPLY) ||\r | |
1006 | (NTOHL (Head->Xid) != DhcpSb->Xid) ||\r | |
982a9eae | 1007 | (CompareMem (DhcpSb->ClientAddressSendOut, Head->ClientHwAddr, Head->HwAddrLen) != 0)) {\r |
772db4bb | 1008 | goto RESTART;\r |
1009 | }\r | |
1010 | \r | |
1011 | //\r | |
1012 | // Validate the options and retrieve the interested options\r | |
1013 | //\r | |
1014 | Para = NULL;\r | |
1015 | if ((Packet->Length > sizeof (EFI_DHCP4_HEADER) + sizeof (UINT32)) &&\r | |
1016 | (Packet->Dhcp4.Magik == DHCP_OPTION_MAGIC) &&\r | |
1017 | EFI_ERROR (DhcpValidateOptions (Packet, &Para))) {\r | |
1018 | \r | |
1019 | goto RESTART;\r | |
1020 | }\r | |
1021 | \r | |
1022 | //\r | |
1023 | // Call the handler for each state. The handler should return\r | |
1024 | // EFI_SUCCESS if the process can go on no matter whether the\r | |
1025 | // packet is ignored or not. If the return is EFI_ERROR, the\r | |
1026 | // session will be terminated. Packet's ownership is handled\r | |
1027 | // over to the handlers. If operation succeeds, the handler\r | |
1028 | // must notify the user. It isn't necessary to do if EFI_ERROR\r | |
1029 | // is returned because the DhcpEndSession will notify the user.\r | |
1030 | //\r | |
1031 | Status = EFI_SUCCESS;\r | |
1032 | \r | |
1033 | switch (DhcpSb->DhcpState) {\r | |
1034 | case Dhcp4Selecting:\r | |
1035 | Status = DhcpHandleSelect (DhcpSb, Packet, Para);\r | |
1036 | break;\r | |
1037 | \r | |
1038 | case Dhcp4Requesting:\r | |
1039 | Status = DhcpHandleRequest (DhcpSb, Packet, Para);\r | |
1040 | break;\r | |
1041 | \r | |
1042 | case Dhcp4InitReboot:\r | |
1043 | case Dhcp4Init:\r | |
1044 | case Dhcp4Bound:\r | |
1045 | //\r | |
1046 | // Ignore the packet in INITREBOOT, INIT and BOUND states\r | |
1047 | //\r | |
e48e37fc | 1048 | gBS->FreePool (Packet);\r |
772db4bb | 1049 | Status = EFI_SUCCESS;\r |
1050 | break;\r | |
1051 | \r | |
1052 | case Dhcp4Renewing:\r | |
1053 | case Dhcp4Rebinding:\r | |
1054 | Status = DhcpHandleRenewRebind (DhcpSb, Packet, Para);\r | |
1055 | break;\r | |
1056 | \r | |
1057 | case Dhcp4Rebooting:\r | |
1058 | Status = DhcpHandleReboot (DhcpSb, Packet, Para);\r | |
1059 | break;\r | |
1060 | }\r | |
1061 | \r | |
1062 | if (Para != NULL) {\r | |
a4df47f1 | 1063 | FreePool (Para);\r |
772db4bb | 1064 | }\r |
1065 | \r | |
1066 | Packet = NULL;\r | |
1067 | \r | |
1068 | if (EFI_ERROR (Status)) {\r | |
1069 | NetbufFree (UdpPacket);\r | |
c5bcc2e2 | 1070 | UdpIoRecvDatagram (DhcpSb->UdpIo, DhcpInput, DhcpSb, 0);\r |
772db4bb | 1071 | DhcpEndSession (DhcpSb, Status);\r |
1072 | return ;\r | |
1073 | }\r | |
1074 | \r | |
1075 | RESTART:\r | |
1076 | NetbufFree (UdpPacket);\r | |
1077 | \r | |
1078 | if (Packet != NULL) {\r | |
e48e37fc | 1079 | gBS->FreePool (Packet);\r |
772db4bb | 1080 | }\r |
1081 | \r | |
1082 | Status = UdpIoRecvDatagram (DhcpSb->UdpIo, DhcpInput, DhcpSb, 0);\r | |
1083 | \r | |
1084 | if (EFI_ERROR (Status)) {\r | |
1085 | DhcpEndSession (DhcpSb, EFI_DEVICE_ERROR);\r | |
1086 | }\r | |
1087 | }\r | |
1088 | \r | |
1089 | \r | |
1090 | /**\r | |
1091 | Release the packet.\r | |
1092 | \r | |
3e8c18da | 1093 | @param[in] Arg The packet to release\r |
772db4bb | 1094 | \r |
1095 | **/\r | |
1096 | VOID\r | |
1097 | DhcpReleasePacket (\r | |
1098 | IN VOID *Arg\r | |
1099 | )\r | |
1100 | {\r | |
e48e37fc | 1101 | gBS->FreePool (Arg);\r |
772db4bb | 1102 | }\r |
1103 | \r | |
1104 | \r | |
1105 | /**\r | |
1106 | Release the net buffer when packet is sent.\r | |
1107 | \r | |
1108 | @param UdpPacket The UDP packets received.\r | |
1109 | @param Points The local/remote UDP access points\r | |
1110 | @param IoStatus The status of the UDP receive\r | |
1111 | @param Context The opaque parameter to the function.\r | |
1112 | \r | |
772db4bb | 1113 | **/\r |
1114 | VOID\r | |
1115 | DhcpOnPacketSent (\r | |
1116 | NET_BUF *Packet,\r | |
1117 | UDP_POINTS *Points,\r | |
1118 | EFI_STATUS IoStatus,\r | |
1119 | VOID *Context\r | |
1120 | )\r | |
1121 | {\r | |
1122 | NetbufFree (Packet);\r | |
1123 | }\r | |
1124 | \r | |
1125 | \r | |
1126 | \r | |
1127 | /**\r | |
1128 | Build and transmit a DHCP message according to the current states.\r | |
1129 | This function implement the Table 5. of RFC 2131. Always transits\r | |
1130 | the state (as defined in Figure 5. of the same RFC) before sending\r | |
1131 | a DHCP message. The table is adjusted accordingly.\r | |
1132 | \r | |
3e8c18da | 1133 | @param[in] DhcpSb The DHCP service instance\r |
1134 | @param[in] Seed The seed packet which the new packet is based on\r | |
1135 | @param[in] Para The DHCP parameter of the Seed packet\r | |
1136 | @param[in] Type The message type to send\r | |
1137 | @param[in] Msg The human readable message to include in the packet\r | |
1138 | sent.\r | |
772db4bb | 1139 | \r |
1140 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resources for the packet\r | |
1141 | @retval EFI_ACCESS_DENIED Failed to transmit the packet through UDP\r | |
1142 | @retval EFI_SUCCESS The message is sent\r | |
f9204641 | 1143 | @retval other Other error occurs\r |
772db4bb | 1144 | \r |
1145 | **/\r | |
1146 | EFI_STATUS\r | |
1147 | DhcpSendMessage (\r | |
1148 | IN DHCP_SERVICE *DhcpSb,\r | |
1149 | IN EFI_DHCP4_PACKET *Seed,\r | |
1150 | IN DHCP_PARAMETER *Para,\r | |
1151 | IN UINT8 Type,\r | |
1152 | IN UINT8 *Msg\r | |
1153 | )\r | |
1154 | {\r | |
1155 | EFI_DHCP4_CONFIG_DATA *Config;\r | |
1156 | EFI_DHCP4_PACKET *Packet;\r | |
1157 | EFI_DHCP4_PACKET *NewPacket;\r | |
1158 | EFI_DHCP4_HEADER *Head;\r | |
1159 | EFI_DHCP4_HEADER *SeedHead;\r | |
1160 | UDP_IO_PORT *UdpIo;\r | |
1161 | UDP_POINTS EndPoint;\r | |
1162 | NET_BUF *Wrap;\r | |
1163 | NET_FRAGMENT Frag;\r | |
1164 | EFI_STATUS Status;\r | |
1165 | IP4_ADDR IpAddr;\r | |
1166 | UINT8 *Buf;\r | |
1167 | UINT16 MaxMsg;\r | |
1168 | UINT32 Len;\r | |
1169 | UINT32 Index;\r | |
1170 | \r | |
1171 | //\r | |
1172 | // Allocate a big enough memory block to hold the DHCP packet\r | |
1173 | //\r | |
1174 | Len = sizeof (EFI_DHCP4_PACKET) + 128 + DhcpSb->UserOptionLen;\r | |
1175 | \r | |
1176 | if (Msg != NULL) {\r | |
687a2e5f | 1177 | Len += (UINT32)AsciiStrLen ((CHAR8 *) Msg);\r |
772db4bb | 1178 | }\r |
1179 | \r | |
e48e37fc | 1180 | Packet = AllocatePool (Len);\r |
772db4bb | 1181 | \r |
1182 | if (Packet == NULL) {\r | |
1183 | return EFI_OUT_OF_RESOURCES;\r | |
1184 | }\r | |
1185 | \r | |
1186 | Packet->Size = Len;\r | |
1187 | Packet->Length = sizeof (EFI_DHCP4_HEADER) + sizeof (UINT32);\r | |
1188 | \r | |
1189 | //\r | |
1190 | // Fill in the DHCP header fields\r | |
1191 | //\r | |
1192 | Config = &DhcpSb->ActiveConfig;\r | |
1193 | SeedHead = NULL;\r | |
1194 | \r | |
1195 | if (Seed != NULL) {\r | |
1196 | SeedHead = &Seed->Dhcp4.Header;\r | |
1197 | }\r | |
1198 | \r | |
1199 | Head = &Packet->Dhcp4.Header;\r | |
e48e37fc | 1200 | ZeroMem (Head, sizeof (EFI_DHCP4_HEADER));\r |
772db4bb | 1201 | \r |
1202 | Head->OpCode = BOOTP_REQUEST;\r | |
1203 | Head->HwType = DhcpSb->HwType;\r | |
1204 | Head->HwAddrLen = DhcpSb->HwLen;\r | |
1205 | Head->Xid = HTONL (DhcpSb->Xid);\r | |
1206 | Head->Reserved = HTONS (0x8000); //Server, broadcast the message please.\r | |
1207 | \r | |
1208 | EFI_IP4 (Head->ClientAddr) = HTONL (DhcpSb->ClientAddr);\r | |
e48e37fc | 1209 | CopyMem (Head->ClientHwAddr, DhcpSb->Mac.Addr, DhcpSb->HwLen);\r |
772db4bb | 1210 | \r |
1211 | //\r | |
1212 | // Append the DHCP message type\r | |
1213 | //\r | |
1214 | Packet->Dhcp4.Magik = DHCP_OPTION_MAGIC;\r | |
1215 | Buf = Packet->Dhcp4.Option;\r | |
1216 | Buf = DhcpAppendOption (Buf, DHCP_TAG_TYPE, 1, &Type);\r | |
1217 | \r | |
1218 | //\r | |
1219 | // Append the serverid option if necessary:\r | |
1220 | // 1. DHCP decline message\r | |
1221 | // 2. DHCP release message\r | |
1222 | // 3. DHCP request to confirm one lease.\r | |
1223 | //\r | |
1224 | if ((Type == DHCP_MSG_DECLINE) || (Type == DHCP_MSG_RELEASE) ||\r | |
f9204641 | 1225 | ((Type == DHCP_MSG_REQUEST) && (DhcpSb->DhcpState == Dhcp4Requesting))\r |
1226 | ) {\r | |
772db4bb | 1227 | \r |
1228 | ASSERT ((Para != NULL) && (Para->ServerId != 0));\r | |
1229 | \r | |
1230 | IpAddr = HTONL (Para->ServerId);\r | |
1231 | Buf = DhcpAppendOption (Buf, DHCP_TAG_SERVER_ID, 4, (UINT8 *) &IpAddr);\r | |
1232 | }\r | |
1233 | \r | |
1234 | //\r | |
1235 | // Append the requested IP option if necessary:\r | |
1236 | // 1. DHCP request to use the previously allocated address\r | |
1237 | // 2. DHCP request to confirm one lease\r | |
1238 | // 3. DHCP decline to decline one lease\r | |
1239 | //\r | |
1240 | IpAddr = 0;\r | |
1241 | \r | |
1242 | if (Type == DHCP_MSG_REQUEST) {\r | |
1243 | if (DhcpSb->DhcpState == Dhcp4Rebooting) {\r | |
1244 | IpAddr = EFI_IP4 (Config->ClientAddress);\r | |
1245 | \r | |
1246 | } else if (DhcpSb->DhcpState == Dhcp4Requesting) {\r | |
1247 | ASSERT (SeedHead != NULL);\r | |
1248 | IpAddr = EFI_IP4 (SeedHead->YourAddr);\r | |
1249 | }\r | |
1250 | \r | |
1251 | } else if (Type == DHCP_MSG_DECLINE) {\r | |
1252 | ASSERT (SeedHead != NULL);\r | |
1253 | IpAddr = EFI_IP4 (SeedHead->YourAddr);\r | |
1254 | }\r | |
1255 | \r | |
1256 | if (IpAddr != 0) {\r | |
1257 | Buf = DhcpAppendOption (Buf, DHCP_TAG_REQUEST_IP, 4, (UINT8 *) &IpAddr);\r | |
1258 | }\r | |
1259 | \r | |
1260 | //\r | |
1261 | // Append the Max Message Length option if it isn't a DECLINE\r | |
1262 | // or RELEASE to direct the server use large messages instead of\r | |
1263 | // override the BOOTFILE and SERVER fields in the message head.\r | |
1264 | //\r | |
1265 | if ((Type != DHCP_MSG_DECLINE) && (Type != DHCP_MSG_RELEASE)) {\r | |
1266 | MaxMsg = HTONS (0xFF00);\r | |
1267 | Buf = DhcpAppendOption (Buf, DHCP_TAG_MAXMSG, 2, (UINT8 *) &MaxMsg);\r | |
1268 | }\r | |
1269 | \r | |
1270 | //\r | |
1271 | // Append the user's message if it isn't NULL\r | |
1272 | //\r | |
1273 | if (Msg != NULL) {\r | |
36ee91ca | 1274 | Len = MIN ((UINT32) AsciiStrLen ((CHAR8 *) Msg), 255);\r |
772db4bb | 1275 | Buf = DhcpAppendOption (Buf, DHCP_TAG_MESSAGE, (UINT16) Len, Msg);\r |
1276 | }\r | |
1277 | \r | |
1278 | //\r | |
1279 | // Append the user configured options\r | |
1280 | //\r | |
1281 | if (DhcpSb->UserOptionLen != 0) {\r | |
1282 | for (Index = 0; Index < Config->OptionCount; Index++) {\r | |
1283 | //\r | |
1284 | // We can't use any option other than the client ID from user\r | |
1285 | // if it is a DHCP decline or DHCP release .\r | |
1286 | //\r | |
1287 | if (((Type == DHCP_MSG_DECLINE) || (Type == DHCP_MSG_RELEASE)) &&\r | |
1288 | (Config->OptionList[Index]->OpCode != DHCP_TAG_CLIENT_ID)) {\r | |
1289 | continue;\r | |
1290 | }\r | |
1291 | \r | |
1292 | Buf = DhcpAppendOption (\r | |
1293 | Buf,\r | |
1294 | Config->OptionList[Index]->OpCode,\r | |
1295 | Config->OptionList[Index]->Length,\r | |
1296 | Config->OptionList[Index]->Data\r | |
1297 | );\r | |
1298 | }\r | |
1299 | }\r | |
1300 | \r | |
1301 | *(Buf++) = DHCP_TAG_EOP;\r | |
1302 | Packet->Length += (UINT32) (Buf - Packet->Dhcp4.Option);\r | |
1303 | \r | |
1304 | //\r | |
1305 | // OK, the message is built, call the user to override it.\r | |
1306 | //\r | |
1307 | Status = EFI_SUCCESS;\r | |
1308 | NewPacket = NULL;\r | |
1309 | \r | |
1310 | if (Type == DHCP_MSG_DISCOVER) {\r | |
1311 | Status = DhcpCallUser (DhcpSb, Dhcp4SendDiscover, Packet, &NewPacket);\r | |
1312 | \r | |
1313 | } else if (Type == DHCP_MSG_REQUEST) {\r | |
1314 | Status = DhcpCallUser (DhcpSb, Dhcp4SendRequest, Packet, &NewPacket);\r | |
1315 | \r | |
1316 | } else if (Type == DHCP_MSG_DECLINE) {\r | |
1317 | Status = DhcpCallUser (DhcpSb, Dhcp4SendDecline, Packet, &NewPacket);\r | |
1318 | }\r | |
1319 | \r | |
1320 | if (EFI_ERROR (Status)) {\r | |
e48e37fc | 1321 | gBS->FreePool (Packet);\r |
772db4bb | 1322 | return Status;\r |
1323 | }\r | |
1324 | \r | |
1325 | if (NewPacket != NULL) {\r | |
e48e37fc | 1326 | gBS->FreePool (Packet);\r |
772db4bb | 1327 | Packet = NewPacket;\r |
1328 | }\r | |
1329 | \r | |
982a9eae | 1330 | //\r |
1331 | // Save the Client Address will be sent out\r | |
1332 | //\r | |
f9204641 | 1333 | CopyMem (\r |
1334 | &DhcpSb->ClientAddressSendOut[0],\r | |
1335 | &Packet->Dhcp4.Header.ClientHwAddr[0],\r | |
1336 | Packet->Dhcp4.Header.HwAddrLen\r | |
1337 | );\r | |
982a9eae | 1338 | \r |
1339 | \r | |
772db4bb | 1340 | //\r |
1341 | // Wrap it into a netbuf then send it.\r | |
1342 | //\r | |
1343 | Frag.Bulk = (UINT8 *) &Packet->Dhcp4.Header;\r | |
1344 | Frag.Len = Packet->Length;\r | |
1345 | Wrap = NetbufFromExt (&Frag, 1, 0, 0, DhcpReleasePacket, Packet);\r | |
1346 | \r | |
1347 | if (Wrap == NULL) {\r | |
e48e37fc | 1348 | gBS->FreePool (Packet);\r |
772db4bb | 1349 | return EFI_OUT_OF_RESOURCES;\r |
1350 | }\r | |
1351 | \r | |
1352 | //\r | |
1353 | // Save it as the last sent packet for retransmission\r | |
1354 | //\r | |
1355 | if (DhcpSb->LastPacket != NULL) {\r | |
434ce3fe | 1356 | FreePool (DhcpSb->LastPacket);\r |
772db4bb | 1357 | }\r |
1358 | \r | |
434ce3fe | 1359 | DhcpSb->LastPacket = Packet;\r |
772db4bb | 1360 | DhcpSetTransmitTimer (DhcpSb);\r |
1361 | \r | |
1362 | //\r | |
1363 | // Broadcast the message, unless we know the server address.\r | |
1364 | // Use the lease UdpIo port to send the unicast packet.\r | |
1365 | //\r | |
1366 | EndPoint.RemoteAddr = 0xffffffff;\r | |
1367 | EndPoint.LocalAddr = 0;\r | |
1368 | EndPoint.RemotePort = DHCP_SERVER_PORT;\r | |
1369 | EndPoint.LocalPort = DHCP_CLIENT_PORT;\r | |
1370 | UdpIo = DhcpSb->UdpIo;\r | |
1371 | \r | |
1372 | if ((DhcpSb->DhcpState == Dhcp4Renewing) || (Type == DHCP_MSG_RELEASE)) {\r | |
1373 | EndPoint.RemoteAddr = DhcpSb->ServerAddr;\r | |
1374 | EndPoint.LocalAddr = DhcpSb->ClientAddr;\r | |
1375 | UdpIo = DhcpSb->LeaseIoPort;\r | |
1376 | }\r | |
1377 | \r | |
1378 | ASSERT (UdpIo != NULL);\r | |
434ce3fe | 1379 | NET_GET_REF (Wrap);\r |
1380 | \r | |
1381 | Status = UdpIoSendDatagram (\r | |
1382 | UdpIo, \r | |
1383 | Wrap, \r | |
1384 | &EndPoint, \r | |
1385 | 0, \r | |
1386 | DhcpOnPacketSent, \r | |
1387 | DhcpSb\r | |
1388 | );\r | |
772db4bb | 1389 | \r |
1390 | if (EFI_ERROR (Status)) {\r | |
434ce3fe | 1391 | NET_PUT_REF (Wrap);\r |
772db4bb | 1392 | return EFI_ACCESS_DENIED;\r |
1393 | }\r | |
1394 | \r | |
1395 | return EFI_SUCCESS;\r | |
1396 | }\r | |
1397 | \r | |
1398 | \r | |
1399 | /**\r | |
1400 | Retransmit a saved packet. Only DISCOVER and REQUEST messages\r | |
1401 | will be retransmitted.\r | |
1402 | \r | |
3e8c18da | 1403 | @param[in] DhcpSb The DHCP service instance\r |
772db4bb | 1404 | \r |
1405 | @retval EFI_ACCESS_DENIED Failed to transmit packet through UDP port\r | |
1406 | @retval EFI_SUCCESS The packet is retransmitted.\r | |
1407 | \r | |
1408 | **/\r | |
1409 | EFI_STATUS\r | |
1410 | DhcpRetransmit (\r | |
1411 | IN DHCP_SERVICE *DhcpSb\r | |
1412 | )\r | |
1413 | {\r | |
1414 | UDP_IO_PORT *UdpIo;\r | |
1415 | UDP_POINTS EndPoint;\r | |
434ce3fe | 1416 | NET_BUF *Wrap;\r |
1417 | NET_FRAGMENT Frag;\r | |
772db4bb | 1418 | EFI_STATUS Status;\r |
1419 | \r | |
1420 | ASSERT (DhcpSb->LastPacket != NULL);\r | |
1421 | \r | |
434ce3fe | 1422 | DhcpSb->LastPacket->Dhcp4.Header.Seconds = HTONS (*(UINT16 *)(&DhcpSb->LastTimeout));\r |
1423 | \r | |
1424 | //\r | |
1425 | // Wrap it into a netbuf then send it.\r | |
1426 | //\r | |
1427 | Frag.Bulk = (UINT8 *) &DhcpSb->LastPacket->Dhcp4.Header;\r | |
1428 | Frag.Len = DhcpSb->LastPacket->Length;\r | |
1429 | Wrap = NetbufFromExt (&Frag, 1, 0, 0, DhcpReleasePacket, DhcpSb->LastPacket);\r | |
1430 | \r | |
1431 | if (Wrap == NULL) {\r | |
1432 | return EFI_OUT_OF_RESOURCES;\r | |
1433 | }\r | |
1434 | \r | |
772db4bb | 1435 | //\r |
1436 | // Broadcast the message, unless we know the server address.\r | |
1437 | //\r | |
1438 | EndPoint.RemotePort = DHCP_SERVER_PORT;\r | |
1439 | EndPoint.LocalPort = DHCP_CLIENT_PORT;\r | |
1440 | EndPoint.RemoteAddr = 0xffffffff;\r | |
1441 | EndPoint.LocalAddr = 0;\r | |
1442 | UdpIo = DhcpSb->UdpIo;\r | |
1443 | \r | |
1444 | if (DhcpSb->DhcpState == Dhcp4Renewing) {\r | |
1445 | EndPoint.RemoteAddr = DhcpSb->ServerAddr;\r | |
1446 | EndPoint.LocalAddr = DhcpSb->ClientAddr;\r | |
1447 | UdpIo = DhcpSb->LeaseIoPort;\r | |
1448 | }\r | |
1449 | \r | |
1450 | ASSERT (UdpIo != NULL);\r | |
1451 | \r | |
434ce3fe | 1452 | NET_GET_REF (Wrap);\r |
772db4bb | 1453 | Status = UdpIoSendDatagram (\r |
1454 | UdpIo,\r | |
434ce3fe | 1455 | Wrap,\r |
772db4bb | 1456 | &EndPoint,\r |
1457 | 0,\r | |
1458 | DhcpOnPacketSent,\r | |
1459 | DhcpSb\r | |
1460 | );\r | |
1461 | \r | |
1462 | if (EFI_ERROR (Status)) {\r | |
434ce3fe | 1463 | NET_PUT_REF (Wrap);\r |
772db4bb | 1464 | return EFI_ACCESS_DENIED;\r |
1465 | }\r | |
1466 | \r | |
1467 | return EFI_SUCCESS;\r | |
1468 | }\r | |
1469 | \r | |
1470 | \r | |
1471 | /**\r | |
1472 | Each DHCP service has three timer. Two of them are count down timer.\r | |
1473 | One for the packet retransmission. The other is to collect the offers.\r | |
1474 | The third timer increaments the lease life which is compared to T1, T2,\r | |
1475 | and lease to determine the time to renew and rebind the lease.\r | |
1476 | DhcpOnTimerTick will be called once every second.\r | |
1477 | \r | |
3e8c18da | 1478 | @param[in] Event The timer event\r |
1479 | @param[in] Context The context, which is the DHCP service instance.\r | |
772db4bb | 1480 | \r |
1481 | **/\r | |
1482 | VOID\r | |
1483 | EFIAPI\r | |
1484 | DhcpOnTimerTick (\r | |
1485 | IN EFI_EVENT Event,\r | |
1486 | IN VOID *Context\r | |
1487 | )\r | |
1488 | {\r | |
1489 | DHCP_SERVICE *DhcpSb;\r | |
c4a62a12 | 1490 | DHCP_PROTOCOL *Instance;\r |
772db4bb | 1491 | EFI_STATUS Status;\r |
982a9eae | 1492 | \r |
c4a62a12 | 1493 | DhcpSb = (DHCP_SERVICE *) Context;\r |
1494 | Instance = DhcpSb->ActiveChild;\r | |
e234f7c4 | 1495 | \r |
c4a62a12 | 1496 | //\r |
e234f7c4 | 1497 | // Check the retransmit timer\r |
c4a62a12 | 1498 | //\r |
e234f7c4 | 1499 | if ((DhcpSb->PacketToLive > 0) && (--DhcpSb->PacketToLive == 0)) {\r |
1500 | \r | |
c4a62a12 | 1501 | //\r |
e234f7c4 | 1502 | // Select offer at each timeout if any offer received.\r |
c4a62a12 | 1503 | //\r |
e234f7c4 | 1504 | if (DhcpSb->DhcpState == Dhcp4Selecting && DhcpSb->LastOffer != NULL) {\r |
772db4bb | 1505 | \r |
e234f7c4 | 1506 | Status = DhcpChooseOffer (DhcpSb);\r |
c4a62a12 | 1507 | \r |
e234f7c4 | 1508 | if (EFI_ERROR(Status)) {\r |
1509 | FreePool (DhcpSb->LastOffer);\r | |
1510 | DhcpSb->LastOffer = NULL;\r | |
1511 | } else {\r | |
1512 | goto ON_EXIT;\r | |
1513 | }\r | |
c4a62a12 | 1514 | }\r |
e234f7c4 | 1515 | \r |
772db4bb | 1516 | if (++DhcpSb->CurRetry < DhcpSb->MaxRetries) {\r |
1517 | //\r | |
1518 | // Still has another try\r | |
1519 | //\r | |
1520 | DhcpRetransmit (DhcpSb);\r | |
1521 | DhcpSetTransmitTimer (DhcpSb);\r | |
1522 | \r | |
e234f7c4 | 1523 | } else if (DHCP_CONNECTED (DhcpSb->DhcpState)) {\r |
772db4bb | 1524 | \r |
1525 | //\r | |
1526 | // Retransmission failed, if the DHCP request is initiated by\r | |
1527 | // user, adjust the current state according to the lease life.\r | |
1528 | // Otherwise do nothing to wait the lease to timeout\r | |
1529 | //\r | |
7bce0c5a | 1530 | if (DhcpSb->ExtraRefresh != 0) {\r |
772db4bb | 1531 | Status = EFI_SUCCESS;\r |
1532 | \r | |
1533 | if (DhcpSb->LeaseLife < DhcpSb->T1) {\r | |
1534 | Status = DhcpSetState (DhcpSb, Dhcp4Bound, FALSE);\r | |
1535 | \r | |
1536 | } else if (DhcpSb->LeaseLife < DhcpSb->T2) {\r | |
1537 | Status = DhcpSetState (DhcpSb, Dhcp4Renewing, FALSE);\r | |
1538 | \r | |
1539 | } else if (DhcpSb->LeaseLife < DhcpSb->Lease) {\r | |
1540 | Status = DhcpSetState (DhcpSb, Dhcp4Rebinding, FALSE);\r | |
1541 | \r | |
1542 | } else {\r | |
1543 | goto END_SESSION;\r | |
1544 | \r | |
1545 | }\r | |
1546 | \r | |
1547 | DhcpSb->IoStatus = EFI_TIMEOUT;\r | |
1548 | DhcpNotifyUser (DhcpSb, DHCP_NOTIFY_RENEWREBIND);\r | |
1549 | }\r | |
e234f7c4 | 1550 | } else {\r |
1551 | goto END_SESSION;\r | |
772db4bb | 1552 | }\r |
1553 | }\r | |
e234f7c4 | 1554 | \r |
772db4bb | 1555 | //\r |
1556 | // If an address has been acquired, check whether need to\r | |
1557 | // refresh or whether it has expired.\r | |
1558 | //\r | |
1559 | if (DHCP_CONNECTED (DhcpSb->DhcpState)) {\r | |
1560 | DhcpSb->LeaseLife++;\r | |
1561 | \r | |
1562 | //\r | |
1563 | // Don't timeout the lease, only count the life if user is\r | |
1564 | // requesting extra renew/rebind. Adjust the state after that.\r | |
1565 | //\r | |
7bce0c5a | 1566 | if (DhcpSb->ExtraRefresh != 0) {\r |
772db4bb | 1567 | return ;\r |
1568 | }\r | |
1569 | \r | |
1570 | if (DhcpSb->LeaseLife == DhcpSb->Lease) {\r | |
1571 | //\r | |
1572 | // Lease expires, end the session\r | |
1573 | //\r | |
1574 | goto END_SESSION;\r | |
1575 | \r | |
1576 | } else if (DhcpSb->LeaseLife == DhcpSb->T2) {\r | |
1577 | //\r | |
1578 | // T2 expires, transit to rebinding then send a REQUEST to any server\r | |
1579 | //\r | |
1580 | if (EFI_ERROR (DhcpSetState (DhcpSb, Dhcp4Rebinding, TRUE))) {\r | |
1581 | goto END_SESSION;\r | |
1582 | }\r | |
1583 | \r | |
1584 | Status = DhcpSendMessage (\r | |
1585 | DhcpSb,\r | |
1586 | DhcpSb->Selected,\r | |
1587 | DhcpSb->Para,\r | |
1588 | DHCP_MSG_REQUEST,\r | |
1589 | NULL\r | |
1590 | );\r | |
1591 | \r | |
1592 | if (EFI_ERROR (Status)) {\r | |
1593 | goto END_SESSION;\r | |
1594 | }\r | |
1595 | \r | |
1596 | } else if (DhcpSb->LeaseLife == DhcpSb->T1) {\r | |
1597 | //\r | |
1598 | // T1 expires, transit to renewing, then send a REQUEST to the server\r | |
1599 | //\r | |
1600 | if (EFI_ERROR (DhcpSetState (DhcpSb, Dhcp4Renewing, TRUE))) {\r | |
1601 | goto END_SESSION;\r | |
1602 | }\r | |
1603 | \r | |
1604 | Status = DhcpSendMessage (\r | |
1605 | DhcpSb,\r | |
1606 | DhcpSb->Selected,\r | |
1607 | DhcpSb->Para,\r | |
1608 | DHCP_MSG_REQUEST,\r | |
1609 | NULL\r | |
1610 | );\r | |
1611 | \r | |
1612 | if (EFI_ERROR (Status)) {\r | |
1613 | goto END_SESSION;\r | |
1614 | }\r | |
1615 | }\r | |
1616 | }\r | |
1617 | \r | |
e234f7c4 | 1618 | ON_EXIT:\r |
c4a62a12 | 1619 | if ((Instance != NULL) && (Instance->Token != NULL)) {\r |
1620 | Instance->Timeout--;\r | |
1621 | if (Instance->Timeout == 0) {\r | |
1622 | PxeDhcpDone (Instance);\r | |
1623 | }\r | |
1624 | }\r | |
1625 | \r | |
772db4bb | 1626 | return ;\r |
1627 | \r | |
1628 | END_SESSION:\r | |
1629 | DhcpEndSession (DhcpSb, EFI_TIMEOUT);\r | |
1630 | \r | |
1631 | return ;\r | |
1632 | }\r |