1 /** @file
2
3 (C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
4 Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15 #include "Udp4Impl.h"
16
17 EFI_UDP4_PROTOCOL mUdp4Protocol = {
18 Udp4GetModeData,
19 Udp4Configure,
20 Udp4Groups,
21 Udp4Routes,
22 Udp4Transmit,
23 Udp4Receive,
24 Udp4Cancel,
25 Udp4Poll
26 };
27
28
29 /**
30 Reads the current operational settings.
31
32 The GetModeData() function copies the current operational settings of this EFI
33 UDPv4 Protocol instance into user-supplied buffers. This function is used
34 optionally to retrieve the operational mode data of underlying networks or
35 drivers.
36
37 @param[in] This Pointer to the EFI_UDP4_PROTOCOL instance.
38 @param[out] Udp4ConfigData Pointer to the buffer to receive the current configuration data.
39 @param[out] Ip4ModeData Pointer to the EFI IPv4 Protocol mode data structure.
40 @param[out] MnpConfigData Pointer to the managed network configuration data structure.
41 @param[out] SnpModeData Pointer to the simple network mode data structure.
42
43 @retval EFI_SUCCESS The mode data was read.
44 @retval EFI_NOT_STARTED When Udp4ConfigData is queried, no configuration data is
45 available because this instance has not been started.
46 @retval EFI_INVALID_PARAMETER This is NULL.
47
48 **/
49 EFI_STATUS
50 EFIAPI
Udp4GetModeData(IN EFI_UDP4_PROTOCOL * This,OUT EFI_UDP4_CONFIG_DATA * Udp4ConfigData OPTIONAL,OUT EFI_IP4_MODE_DATA * Ip4ModeData OPTIONAL,OUT EFI_MANAGED_NETWORK_CONFIG_DATA * MnpConfigData OPTIONAL,OUT EFI_SIMPLE_NETWORK_MODE * SnpModeData OPTIONAL)51 Udp4GetModeData (
52 IN EFI_UDP4_PROTOCOL *This,
53 OUT EFI_UDP4_CONFIG_DATA *Udp4ConfigData OPTIONAL,
54 OUT EFI_IP4_MODE_DATA *Ip4ModeData OPTIONAL,
55 OUT EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData OPTIONAL,
56 OUT EFI_SIMPLE_NETWORK_MODE *SnpModeData OPTIONAL
57 )
58 {
59 UDP4_INSTANCE_DATA *Instance;
60 EFI_IP4_PROTOCOL *Ip;
61 EFI_TPL OldTpl;
62 EFI_STATUS Status;
63
64 if (This == NULL) {
65 return EFI_INVALID_PARAMETER;
66 }
67
68 Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
69
70 if (!Instance->Configured && (Udp4ConfigData != NULL)) {
71 return EFI_NOT_STARTED;
72 }
73
74 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
75
76 if (Udp4ConfigData != NULL) {
77 //
78 // Set the Udp4ConfigData.
79 //
80 CopyMem (Udp4ConfigData, &Instance->ConfigData, sizeof (*Udp4ConfigData));
81 }
82
83 Ip = Instance->IpInfo->Ip.Ip4;
84
85 //
86 // Get the underlying Ip4ModeData, MnpConfigData and SnpModeData.
87 //
88 Status = Ip->GetModeData (Ip, Ip4ModeData, MnpConfigData, SnpModeData);
89
90 gBS->RestoreTPL (OldTpl);
91
92 return Status;
93 }
94
95
96 /**
97 Initializes, changes, or resets the operational parameters for this instance of the EFI UDPv4
98 Protocol.
99
100 The Configure() function is used to do the following:
101 * Initialize and start this instance of the EFI UDPv4 Protocol.
102 * Change the filtering rules and operational parameters.
103 * Reset this instance of the EFI UDPv4 Protocol.
104 Until these parameters are initialized, no network traffic can be sent or
105 received by this instance. This instance can be also reset by calling Configure()
106 with UdpConfigData set to NULL. Once reset, the receiving queue and transmitting
107 queue are flushed and no traffic is allowed through this instance.
108 With different parameters in UdpConfigData, Configure() can be used to bind
109 this instance to specified port.
110
111 @param[in] This Pointer to the EFI_UDP4_PROTOCOL instance.
112 @param[in] UdpConfigData Pointer to the buffer to receive the current configuration data.
113
114 @retval EFI_SUCCESS The configuration settings were set, changed, or reset successfully.
115 @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP,
116 RARP, etc.) is not finished yet.
117 @retval EFI_INVALID_PARAMETER One or more following conditions are TRUE:
118 @retval EFI_ALREADY_STARTED The EFI UDPv4 Protocol instance is already started/configured
119 and must be stopped/reset before it can be reconfigured.
120 @retval EFI_ACCESS_DENIED UdpConfigData. AllowDuplicatePort is FALSE
121 and UdpConfigData.StationPort is already used by
122 other instance.
123 @retval EFI_OUT_OF_RESOURCES The EFI UDPv4 Protocol driver cannot allocate memory for this
124 EFI UDPv4 Protocol instance.
125 @retval EFI_DEVICE_ERROR An unexpected network or system error occurred and this instance
126 was not opened.
127
128 **/
129 EFI_STATUS
130 EFIAPI
Udp4Configure(IN EFI_UDP4_PROTOCOL * This,IN EFI_UDP4_CONFIG_DATA * UdpConfigData OPTIONAL)131 Udp4Configure (
132 IN EFI_UDP4_PROTOCOL *This,
133 IN EFI_UDP4_CONFIG_DATA *UdpConfigData OPTIONAL
134 )
135 {
136 EFI_STATUS Status;
137 UDP4_INSTANCE_DATA *Instance;
138 UDP4_SERVICE_DATA *Udp4Service;
139 EFI_TPL OldTpl;
140 IP4_ADDR StationAddress;
141 IP4_ADDR SubnetMask;
142 IP4_ADDR RemoteAddress;
143 EFI_IP4_CONFIG_DATA Ip4ConfigData;
144 IP4_ADDR LocalAddr;
145 IP4_ADDR RemoteAddr;
146
147 if (This == NULL) {
148 return EFI_INVALID_PARAMETER;
149 }
150
151 Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
152
153 if (!Instance->Configured && (UdpConfigData == NULL)) {
154 return EFI_SUCCESS;
155 }
156
157 Udp4Service = Instance->Udp4Service;
158 Status = EFI_SUCCESS;
159
160 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
161
162 if (UdpConfigData != NULL) {
163
164 CopyMem (&StationAddress, &UdpConfigData->StationAddress, sizeof (IP4_ADDR));
165 CopyMem (&SubnetMask, &UdpConfigData->SubnetMask, sizeof (IP4_ADDR));
166 CopyMem (&RemoteAddress, &UdpConfigData->RemoteAddress, sizeof (IP4_ADDR));
167
168 StationAddress = NTOHL (StationAddress);
169 SubnetMask = NTOHL (SubnetMask);
170 RemoteAddress = NTOHL (RemoteAddress);
171
172
173 if (!UdpConfigData->UseDefaultAddress &&
174 (!IP4_IS_VALID_NETMASK (SubnetMask) ||
175 !((StationAddress == 0) || NetIp4IsUnicast (StationAddress, SubnetMask)) ||
176 !((RemoteAddress == 0) || NetIp4IsUnicast (RemoteAddress, 0)))) {
177 //
178 // Don't use default address, and subnet mask is invalid or StationAddress is not
179 // a valid unicast IPv4 address or RemoteAddress is not a valid unicast IPv4 address
180 // if it is not 0.
181 //
182 Status = EFI_INVALID_PARAMETER;
183 goto ON_EXIT;
184 }
185
186 if (Instance->Configured) {
187 //
188 // The instance is already configured, try to do the re-configuration.
189 //
190 if (!Udp4IsReconfigurable (&Instance->ConfigData, UdpConfigData)) {
191 //
192 // If the new configuration data wants to change some unreconfigurable
193 // settings, return EFI_ALREADY_STARTED.
194 //
195 Status = EFI_ALREADY_STARTED;
196 goto ON_EXIT;
197 }
198
199 //
200 // Save the reconfigurable parameters.
201 //
202 Instance->ConfigData.TypeOfService = UdpConfigData->TypeOfService;
203 Instance->ConfigData.TimeToLive = UdpConfigData->TimeToLive;
204 Instance->ConfigData.DoNotFragment = UdpConfigData->DoNotFragment;
205 Instance->ConfigData.ReceiveTimeout = UdpConfigData->ReceiveTimeout;
206 Instance->ConfigData.TransmitTimeout = UdpConfigData->TransmitTimeout;
207 } else {
208 //
209 // Construct the Ip configuration data from the UdpConfigData.
210 //
211 Udp4BuildIp4ConfigData (UdpConfigData, &Ip4ConfigData);
212
213 //
214 // Configure the Ip instance wrapped in the IpInfo.
215 //
216 Status = IpIoConfigIp (Instance->IpInfo, &Ip4ConfigData);
217 if (EFI_ERROR (Status)) {
218 if (Status == EFI_NO_MAPPING) {
219 Instance->IsNoMapping = TRUE;
220 }
221
222 goto ON_EXIT;
223 }
224
225 Instance->IsNoMapping = FALSE;
226
227 //
228 // Save the configuration data.
229 //
230 CopyMem (&Instance->ConfigData, UdpConfigData, sizeof (Instance->ConfigData));
231 IP4_COPY_ADDRESS (&Instance->ConfigData.StationAddress, &Ip4ConfigData.StationAddress);
232 IP4_COPY_ADDRESS (&Instance->ConfigData.SubnetMask, &Ip4ConfigData.SubnetMask);
233
234 //
235 // Try to allocate the required port resource.
236 //
237 Status = Udp4Bind (&Udp4Service->ChildrenList, &Instance->ConfigData);
238 if (EFI_ERROR (Status)) {
239 //
240 // Reset the ip instance if bind fails.
241 //
242 IpIoConfigIp (Instance->IpInfo, NULL);
243 goto ON_EXIT;
244 }
245
246 //
247 // Pre calculate the checksum for the pseudo head, ignore the UDP length first.
248 //
249 CopyMem (&LocalAddr, &Instance->ConfigData.StationAddress, sizeof (IP4_ADDR));
250 CopyMem (&RemoteAddr, &Instance->ConfigData.RemoteAddress, sizeof (IP4_ADDR));
251 Instance->HeadSum = NetPseudoHeadChecksum (
252 LocalAddr,
253 RemoteAddr,
254 EFI_IP_PROTO_UDP,
255 0
256 );
257
258 Instance->Configured = TRUE;
259 }
260 } else {
261 //
262 // UdpConfigData is NULL, reset the instance.
263 //
264 Instance->Configured = FALSE;
265 Instance->IsNoMapping = FALSE;
266
267 //
268 // Reset the Ip instance wrapped in the IpInfo.
269 //
270 IpIoConfigIp (Instance->IpInfo, NULL);
271
272 //
273 // Cancel all the user tokens.
274 //
275 Instance->Udp4Proto.Cancel (&Instance->Udp4Proto, NULL);
276
277 //
278 // Remove the buffered RxData for this instance.
279 //
280 Udp4FlushRcvdDgram (Instance);
281
282 ASSERT (IsListEmpty (&Instance->DeliveredDgramQue));
283 }
284
285 ON_EXIT:
286
287 gBS->RestoreTPL (OldTpl);
288
289 return Status;
290 }
291
292
293 /**
294 Joins and leaves multicast groups.
295
296 The Groups() function is used to enable and disable the multicast group
297 filtering. If the JoinFlag is FALSE and the MulticastAddress is NULL, then all
298 currently joined groups are left.
299
300 @param[in] This Pointer to the EFI_UDP4_PROTOCOL instance.
301 @param[in] JoinFlag Set to TRUE to join a multicast group. Set to FALSE to leave one
302 or all multicast groups.
303 @param[in] MulticastAddress Pointer to multicast group address to join or leave.
304
305 @retval EFI_SUCCESS The operation completed successfully.
306 @retval EFI_NOT_STARTED The EFI UDPv4 Protocol instance has not been started.
307 @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP,
308 RARP, etc.) is not finished yet.
309 @retval EFI_OUT_OF_RESOURCES Could not allocate resources to join the group.
310 @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
311 - This is NULL.
312 - JoinFlag is TRUE and MulticastAddress is NULL.
313 - JoinFlag is TRUE and *MulticastAddress is not
314 a valid multicast address.
315 @retval EFI_ALREADY_STARTED The group address is already in the group table (when
316 JoinFlag is TRUE).
317 @retval EFI_NOT_FOUND The group address is not in the group table (when JoinFlag is
318 FALSE).
319 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
320
321 **/
322 EFI_STATUS
323 EFIAPI
Udp4Groups(IN EFI_UDP4_PROTOCOL * This,IN BOOLEAN JoinFlag,IN EFI_IPv4_ADDRESS * MulticastAddress OPTIONAL)324 Udp4Groups (
325 IN EFI_UDP4_PROTOCOL *This,
326 IN BOOLEAN JoinFlag,
327 IN EFI_IPv4_ADDRESS *MulticastAddress OPTIONAL
328 )
329 {
330 EFI_STATUS Status;
331 UDP4_INSTANCE_DATA *Instance;
332 EFI_IP4_PROTOCOL *Ip;
333 EFI_TPL OldTpl;
334 IP4_ADDR McastIp;
335
336 if ((This == NULL) || (JoinFlag && (MulticastAddress == NULL))) {
337 return EFI_INVALID_PARAMETER;
338 }
339
340 McastIp = 0;
341 if (JoinFlag) {
342 CopyMem (&McastIp, MulticastAddress, sizeof (IP4_ADDR));
343
344 if (!IP4_IS_MULTICAST (NTOHL (McastIp))) {
345 return EFI_INVALID_PARAMETER;
346 }
347 }
348
349 Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
350
351 if (Instance->IsNoMapping) {
352 return EFI_NO_MAPPING;
353 }
354
355 if (!Instance->Configured) {
356 return EFI_NOT_STARTED;
357 }
358
359 Ip = Instance->IpInfo->Ip.Ip4;
360
361 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
362
363 //
364 // Invoke the Ip instance the Udp4 instance consumes to do the group operation.
365 //
366 Status = Ip->Groups (Ip, JoinFlag, MulticastAddress);
367
368 if (EFI_ERROR (Status)) {
369 goto ON_EXIT;
370 }
371
372 //
373 // Keep a local copy of the configured multicast IPs because IpIo receives
374 // datagrams from the 0 station address IP instance and then UDP delivers to
375 // the matched instance. This copy of multicast IPs is used to avoid receive
376 // the mutlicast datagrams destined to multicast IPs the other instances configured.
377 //
378 if (JoinFlag) {
379
380 NetMapInsertTail (&Instance->McastIps, (VOID *) (UINTN) McastIp, NULL);
381 } else {
382
383 NetMapIterate (&Instance->McastIps, Udp4LeaveGroup, MulticastAddress);
384 }
385
386 ON_EXIT:
387
388 gBS->RestoreTPL (OldTpl);
389
390 return Status;
391 }
392
393
394 /**
395 Adds and deletes routing table entries.
396
397 The Routes() function adds a route to or deletes a route from the routing table.
398 Routes are determined by comparing the SubnetAddress with the destination IP
399 address and arithmetically AND-ing it with the SubnetMask. The gateway address
400 must be on the same subnet as the configured station address.
401 The default route is added with SubnetAddress and SubnetMask both set to 0.0.0.0.
402 The default route matches all destination IP addresses that do not match any
403 other routes.
404 A zero GatewayAddress is a nonroute. Packets are sent to the destination IP
405 address if it can be found in the Address Resolution Protocol (ARP) cache or
406 on the local subnet. One automatic nonroute entry will be inserted into the
407 routing table for outgoing packets that are addressed to a local subnet
408 (gateway address of 0.0.0.0).
409 Each instance of the EFI UDPv4 Protocol has its own independent routing table.
410 Instances of the EFI UDPv4 Protocol that use the default IP address will also
411 have copies of the routing table provided by the EFI_IP4_CONFIG_PROTOCOL. These
412 copies will be updated automatically whenever the IP driver reconfigures its
413 instances; as a result, the previous modification to these copies will be lost.
414
415 @param[in] This Pointer to the EFI_UDP4_PROTOCOL instance.
416 @param[in] DeleteRoute Set to TRUE to delete this route from the routing table.
417 Set to FALSE to add this route to the routing table.
418 @param[in] SubnetAddress The destination network address that needs to be routed.
419 @param[in] SubnetMask The subnet mask of SubnetAddress.
420 @param[in] GatewayAddress The gateway IP address for this route.
421
422 @retval EFI_SUCCESS The operation completed successfully.
423 @retval EFI_NOT_STARTED The EFI UDPv4 Protocol instance has not been started.
424 @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP,
425 - RARP, etc.) is not finished yet.
426 @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
427 @retval EFI_OUT_OF_RESOURCES Could not add the entry to the routing table.
428 @retval EFI_NOT_FOUND This route is not in the routing table.
429 @retval EFI_ACCESS_DENIED The route is already defined in the routing table.
430
431 **/
432 EFI_STATUS
433 EFIAPI
Udp4Routes(IN EFI_UDP4_PROTOCOL * This,IN BOOLEAN DeleteRoute,IN EFI_IPv4_ADDRESS * SubnetAddress,IN EFI_IPv4_ADDRESS * SubnetMask,IN EFI_IPv4_ADDRESS * GatewayAddress)434 Udp4Routes (
435 IN EFI_UDP4_PROTOCOL *This,
436 IN BOOLEAN DeleteRoute,
437 IN EFI_IPv4_ADDRESS *SubnetAddress,
438 IN EFI_IPv4_ADDRESS *SubnetMask,
439 IN EFI_IPv4_ADDRESS *GatewayAddress
440 )
441 {
442 UDP4_INSTANCE_DATA *Instance;
443 EFI_IP4_PROTOCOL *Ip;
444
445 if (This == NULL) {
446 return EFI_INVALID_PARAMETER;
447 }
448
449 Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
450
451 if (Instance->IsNoMapping) {
452 return EFI_NO_MAPPING;
453 }
454
455 if (!Instance->Configured) {
456 return EFI_NOT_STARTED;
457 }
458
459 Ip = Instance->IpInfo->Ip.Ip4;
460
461 //
462 // Invoke the Ip instance the Udp4 instance consumes to do the actual operation.
463 //
464 return Ip->Routes (Ip, DeleteRoute, SubnetAddress, SubnetMask, GatewayAddress);
465 }
466
467
468 /**
469 Queues outgoing data packets into the transmit queue.
470
471 The Transmit() function places a sending request to this instance of the EFI
472 UDPv4 Protocol, alongside the transmit data that was filled by the user. Whenever
473 the packet in the token is sent out or some errors occur, the Token.Event will
474 be signaled and Token.Status is updated. Providing a proper notification function
475 and context for the event will enable the user to receive the notification and
476 transmitting status.
477
478 @param[in] This Pointer to the EFI_UDP4_PROTOCOL instance.
479 @param[in] Token Pointer to the completion token that will be placed into the
480 transmit queue.
481
482 @retval EFI_SUCCESS The data has been queued for transmission.
483 @retval EFI_NOT_STARTED This EFI UDPv4 Protocol instance has not been started.
484 @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP,
485 RARP, etc.) is not finished yet.
486 @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
487 @retval EFI_ACCESS_DENIED The transmit completion token with the same
488 Token.Event was already in the transmit queue.
489 @retval EFI_NOT_READY The completion token could not be queued because the
490 transmit queue is full.
491 @retval EFI_OUT_OF_RESOURCES Could not queue the transmit data.
492 @retval EFI_NOT_FOUND There is no route to the destination network or address.
493 @retval EFI_BAD_BUFFER_SIZE The data length is greater than the maximum UDP packet
494 size. Or the length of the IP header + UDP header + data
495 length is greater than MTU if DoNotFragment is TRUE.
496
497 **/
498 EFI_STATUS
499 EFIAPI
Udp4Transmit(IN EFI_UDP4_PROTOCOL * This,IN EFI_UDP4_COMPLETION_TOKEN * Token)500 Udp4Transmit (
501 IN EFI_UDP4_PROTOCOL *This,
502 IN EFI_UDP4_COMPLETION_TOKEN *Token
503 )
504 {
505 EFI_STATUS Status;
506 UDP4_INSTANCE_DATA *Instance;
507 EFI_TPL OldTpl;
508 NET_BUF *Packet;
509 EFI_UDP_HEADER *Udp4Header;
510 EFI_UDP4_CONFIG_DATA *ConfigData;
511 IP4_ADDR Source;
512 IP4_ADDR Destination;
513 EFI_UDP4_TRANSMIT_DATA *TxData;
514 EFI_UDP4_SESSION_DATA *UdpSessionData;
515 UDP4_SERVICE_DATA *Udp4Service;
516 IP_IO_OVERRIDE Override;
517 UINT16 HeadSum;
518 EFI_IP_ADDRESS IpDestAddr;
519
520 if ((This == NULL) || (Token == NULL)) {
521 return EFI_INVALID_PARAMETER;
522 }
523
524 Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
525
526 if (Instance->IsNoMapping) {
527 return EFI_NO_MAPPING;
528 }
529
530 if (!Instance->Configured) {
531 return EFI_NOT_STARTED;
532 }
533
534 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
535
536 //
537 // Validate the Token, if the token is invalid return the error code.
538 //
539 Status = Udp4ValidateTxToken (Instance, Token);
540 if (EFI_ERROR (Status)) {
541 goto ON_EXIT;
542 }
543
544 if (EFI_ERROR (NetMapIterate (&Instance->TxTokens, Udp4TokenExist, Token)) ||
545 EFI_ERROR (NetMapIterate (&Instance->RxTokens, Udp4TokenExist, Token))) {
546 //
547 // Try to find a duplicate token in the two token maps, if found, return
548 // EFI_ACCESS_DENIED.
549 //
550 Status = EFI_ACCESS_DENIED;
551 goto ON_EXIT;
552 }
553
554 TxData = Token->Packet.TxData;
555
556 //
557 // Create a net buffer to hold the user buffer and the udp header.
558 //
559 Packet = NetbufFromExt (
560 (NET_FRAGMENT *)TxData->FragmentTable,
561 TxData->FragmentCount,
562 UDP4_HEADER_SIZE,
563 0,
564 Udp4NetVectorExtFree,
565 NULL
566 );
567 if (Packet == NULL) {
568 Status = EFI_OUT_OF_RESOURCES;
569 goto ON_EXIT;
570 }
571
572 //
573 // Store the IpIo in ProtoData.
574 //
575 Udp4Service = Instance->Udp4Service;
576 *((UINTN *) &Packet->ProtoData[0]) = (UINTN) (Udp4Service->IpIo);
577
578 Udp4Header = (EFI_UDP_HEADER *) NetbufAllocSpace (Packet, UDP4_HEADER_SIZE, TRUE);
579 ASSERT (Udp4Header != NULL);
580
581 ConfigData = &Instance->ConfigData;
582
583 //
584 // Fill the udp header.
585 //
586 Udp4Header->SrcPort = HTONS (ConfigData->StationPort);
587 Udp4Header->DstPort = HTONS (ConfigData->RemotePort);
588 Udp4Header->Length = HTONS ((UINT16) Packet->TotalSize);
589 Udp4Header->Checksum = 0;
590
591 UdpSessionData = TxData->UdpSessionData;
592 IP4_COPY_ADDRESS (&Override.Ip4OverrideData.SourceAddress, &ConfigData->StationAddress);
593
594 if (UdpSessionData != NULL) {
595 //
596 // Set the SourceAddress, SrcPort and Destination according to the specified
597 // UdpSessionData.
598 //
599 if (!EFI_IP4_EQUAL (&UdpSessionData->SourceAddress, &mZeroIp4Addr)) {
600 IP4_COPY_ADDRESS (&Override.Ip4OverrideData.SourceAddress, &UdpSessionData->SourceAddress);
601 }
602
603 if (UdpSessionData->SourcePort != 0) {
604 Udp4Header->SrcPort = HTONS (UdpSessionData->SourcePort);
605 }
606
607 if (UdpSessionData->DestinationPort != 0) {
608 Udp4Header->DstPort = HTONS (UdpSessionData->DestinationPort);
609 }
610
611 CopyMem (&Source, &Override.Ip4OverrideData.SourceAddress, sizeof (IP4_ADDR));
612 CopyMem (&Destination, &UdpSessionData->DestinationAddress, sizeof (IP4_ADDR));
613
614 //
615 // calculate the pseudo head checksum using the overridden parameters.
616 //
617 HeadSum = NetPseudoHeadChecksum (
618 Source,
619 Destination,
620 EFI_IP_PROTO_UDP,
621 0
622 );
623 } else {
624 //
625 // UdpSessionData is NULL, use the address and port information previously configured.
626 //
627 CopyMem (&Destination, &ConfigData->RemoteAddress, sizeof (IP4_ADDR));
628
629 HeadSum = Instance->HeadSum;
630 }
631
632 //
633 // calculate the checksum.
634 //
635 Udp4Header->Checksum = Udp4Checksum (Packet, HeadSum);
636 if (Udp4Header->Checksum == 0) {
637 //
638 // If the calculated checksum is 0, fill the Checksum field with all ones.
639 //
640 Udp4Header->Checksum = 0xffff;
641 }
642
643 //
644 // Fill the IpIo Override data.
645 //
646 if (TxData->GatewayAddress != NULL) {
647 IP4_COPY_ADDRESS (&Override.Ip4OverrideData.GatewayAddress, TxData->GatewayAddress);
648 } else {
649 ZeroMem (&Override.Ip4OverrideData.GatewayAddress, sizeof (EFI_IPv4_ADDRESS));
650 }
651
652 Override.Ip4OverrideData.Protocol = EFI_IP_PROTO_UDP;
653 Override.Ip4OverrideData.TypeOfService = ConfigData->TypeOfService;
654 Override.Ip4OverrideData.TimeToLive = ConfigData->TimeToLive;
655 Override.Ip4OverrideData.DoNotFragment = ConfigData->DoNotFragment;
656
657 //
658 // Save the token into the TxToken map.
659 //
660 Status = NetMapInsertTail (&Instance->TxTokens, Token, Packet);
661 if (EFI_ERROR (Status)) {
662 goto FREE_PACKET;
663 }
664
665 //
666 // Send out this datagram through IpIo.
667 //
668 IpDestAddr.Addr[0] = Destination;
669 Status = IpIoSend (
670 Udp4Service->IpIo,
671 Packet,
672 Instance->IpInfo,
673 Instance,
674 Token,
675 &IpDestAddr,
676 &Override
677 );
678 if (EFI_ERROR (Status)) {
679 //
680 // Remove this token from the TxTokens.
681 //
682 Udp4RemoveToken (&Instance->TxTokens, Token);
683 }
684
685 FREE_PACKET:
686
687 NetbufFree (Packet);
688
689 ON_EXIT:
690
691 gBS->RestoreTPL (OldTpl);
692
693 return Status;
694 }
695
696
697 /**
698 Places an asynchronous receive request into the receiving queue.
699
700 The Receive() function places a completion token into the receive packet queue.
701 This function is always asynchronous.
702 The caller must fill in the Token.Event field in the completion token, and this
703 field cannot be NULL. When the receive operation completes, the EFI UDPv4 Protocol
704 driver updates the Token.Status and Token.Packet.RxData fields and the Token.Event
705 is signaled. Providing a proper notification function and context for the event
706 will enable the user to receive the notification and receiving status. That
707 notification function is guaranteed to not be re-entered.
708
709 @param[in] This Pointer to the EFI_UDP4_PROTOCOL instance.
710 @param[in] Token Pointer to a token that is associated with
711 the receive data descriptor.
712
713 @retval EFI_SUCCESS The receive completion token was cached.
714 @retval EFI_NOT_STARTED This EFI UDPv4 Protocol instance has not been started.
715 @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP, RARP, etc.)
716 is not finished yet.
717 @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
718 @retval EFI_OUT_OF_RESOURCES The receive completion token could not be queued due to a lack of system
719 resources (usually memory).
720 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
721 @retval EFI_ACCESS_DENIED A receive completion token with the same Token.Event was already in
722 the receive queue.
723 @retval EFI_NOT_READY The receive request could not be queued because the receive queue is full.
724
725 **/
726 EFI_STATUS
727 EFIAPI
Udp4Receive(IN EFI_UDP4_PROTOCOL * This,IN EFI_UDP4_COMPLETION_TOKEN * Token)728 Udp4Receive (
729 IN EFI_UDP4_PROTOCOL *This,
730 IN EFI_UDP4_COMPLETION_TOKEN *Token
731 )
732 {
733 EFI_STATUS Status;
734 UDP4_INSTANCE_DATA *Instance;
735 EFI_TPL OldTpl;
736
737 if ((This == NULL) || (Token == NULL) || (Token->Event == NULL)) {
738 return EFI_INVALID_PARAMETER;
739 }
740
741 Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
742
743 if (Instance->IsNoMapping) {
744 return EFI_NO_MAPPING;
745 }
746
747 if (!Instance->Configured) {
748 return EFI_NOT_STARTED;
749 }
750
751 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
752
753 if (EFI_ERROR (NetMapIterate (&Instance->RxTokens, Udp4TokenExist, Token))||
754 EFI_ERROR (NetMapIterate (&Instance->TxTokens, Udp4TokenExist, Token))) {
755 //
756 // Return EFI_ACCESS_DENIED if the specified token is already in the TxTokens or
757 // RxTokens map.
758 //
759 Status = EFI_ACCESS_DENIED;
760 goto ON_EXIT;
761 }
762
763 Token->Packet.RxData = NULL;
764
765 //
766 // Save the token into the RxTokens map.
767 //
768 Status = NetMapInsertTail (&Instance->RxTokens, Token, NULL);
769 if (EFI_ERROR (Status)) {
770 Status = EFI_NOT_READY;
771 goto ON_EXIT;
772 }
773
774 //
775 // If there is an icmp error, report it.
776 //
777 Udp4ReportIcmpError (Instance);
778
779 //
780 // Try to deliver the received datagrams.
781 //
782 Udp4InstanceDeliverDgram (Instance);
783
784 //
785 // Dispatch the DPC queued by the NotifyFunction of Token->Event.
786 //
787 DispatchDpc ();
788
789 ON_EXIT:
790
791 gBS->RestoreTPL (OldTpl);
792
793 return Status;
794 }
795
796
797 /**
798 Aborts an asynchronous transmit or receive request.
799
800 The Cancel() function is used to abort a pending transmit or receive request.
801 If the token is in the transmit or receive request queues, after calling this
802 function, Token.Status will be set to EFI_ABORTED and then Token.Event will be
803 signaled. If the token is not in one of the queues, which usually means that
804 the asynchronous operation has completed, this function will not signal the
805 token and EFI_NOT_FOUND is returned.
806
807 @param[in] This Pointer to the EFI_UDP4_PROTOCOL instance.
808 @param[in] Token Pointer to a token that has been issued by
809 EFI_UDP4_PROTOCOL.Transmit() or
810 EFI_UDP4_PROTOCOL.Receive().If NULL, all pending
811 tokens are aborted.
812
813 @retval EFI_SUCCESS The asynchronous I/O request was aborted and Token.Event
814 was signaled. When Token is NULL, all pending requests are
815 aborted and their events are signaled.
816 @retval EFI_INVALID_PARAMETER This is NULL.
817 @retval EFI_NOT_STARTED This instance has not been started.
818 @retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
819 RARP, etc.) is not finished yet.
820 @retval EFI_NOT_FOUND When Token is not NULL, the asynchronous I/O request was
821 not found in the transmit or receive queue. It has either completed
822 or was not issued by Transmit() and Receive().
823
824 **/
825 EFI_STATUS
826 EFIAPI
Udp4Cancel(IN EFI_UDP4_PROTOCOL * This,IN EFI_UDP4_COMPLETION_TOKEN * Token OPTIONAL)827 Udp4Cancel (
828 IN EFI_UDP4_PROTOCOL *This,
829 IN EFI_UDP4_COMPLETION_TOKEN *Token OPTIONAL
830 )
831 {
832 EFI_STATUS Status;
833 UDP4_INSTANCE_DATA *Instance;
834 EFI_TPL OldTpl;
835
836 if (This == NULL) {
837 return EFI_INVALID_PARAMETER;
838 }
839
840 Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
841
842 if (Instance->IsNoMapping) {
843 return EFI_NO_MAPPING;
844 }
845
846 if (!Instance->Configured) {
847 return EFI_NOT_STARTED;
848 }
849
850 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
851
852 //
853 // Cancle the tokens specified by Token for this instance.
854 //
855 Status = Udp4InstanceCancelToken (Instance, Token);
856
857 //
858 // Dispatch the DPC queued by the NotifyFunction of the cancelled token's events.
859 //
860 DispatchDpc ();
861
862 gBS->RestoreTPL (OldTpl);
863
864 return Status;
865 }
866
867
868 /**
869 Polls for incoming data packets and processes outgoing data packets.
870
871 The Poll() function can be used by network drivers and applications to increase
872 the rate that data packets are moved between the communications device and the
873 transmit and receive queues.
874 In some systems, the periodic timer event in the managed network driver may not
875 poll the underlying communications device fast enough to transmit and/or receive
876 all data packets without missing incoming packets or dropping outgoing packets.
877 Drivers and applications that are experiencing packet loss should try calling
878 the Poll() function more often.
879
880 @param[in] This Pointer to the EFI_UDP4_PROTOCOL instance.
881
882 @retval EFI_SUCCESS Incoming or outgoing data was processed.
883 @retval EFI_INVALID_PARAMETER This is NULL.
884 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
885 @retval EFI_TIMEOUT Data was dropped out of the transmit and/or receive queue.
886
887 **/
888 EFI_STATUS
889 EFIAPI
Udp4Poll(IN EFI_UDP4_PROTOCOL * This)890 Udp4Poll (
891 IN EFI_UDP4_PROTOCOL *This
892 )
893 {
894 UDP4_INSTANCE_DATA *Instance;
895 EFI_IP4_PROTOCOL *Ip;
896
897 if (This == NULL) {
898 return EFI_INVALID_PARAMETER;
899 }
900
901 Instance = UDP4_INSTANCE_DATA_FROM_THIS (This);
902 Ip = Instance->IpInfo->Ip.Ip4;
903
904 //
905 // Invode the Ip instance consumed by the udp instance to do the poll operation.
906 //
907 return Ip->Poll (Ip);
908 }
909