diff options
Diffstat (limited to 'Core/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.c')
| -rw-r--r-- | Core/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.c | 2377 |
1 files changed, 2377 insertions, 0 deletions
diff --git a/Core/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.c b/Core/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.c new file mode 100644 index 0000000000..a295b827af --- /dev/null +++ b/Core/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.c @@ -0,0 +1,2377 @@ +/** @file
+ Functions implementation related with DHCPv6 for UefiPxeBc Driver.
+
+ (C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
+ Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "PxeBcImpl.h"
+
+//
+// Well-known multi-cast address defined in section-24.1 of rfc-3315
+//
+// ALL_DHCP_Relay_Agents_and_Servers address: FF02::1:2
+//
+EFI_IPv6_ADDRESS mAllDhcpRelayAndServersAddress = {{0xFF, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2}};
+
+/**
+ Parse out a DHCPv6 option by OptTag, and find the position in buffer.
+
+ @param[in] Buffer The pointer to the option buffer.
+ @param[in] Length Length of the option buffer.
+ @param[in] OptTag The required option tag.
+
+ @retval NULL Failed to parse the required option.
+ @retval Others The postion of the required option in buffer.
+
+**/
+EFI_DHCP6_PACKET_OPTION *
+PxeBcParseDhcp6Options (
+ IN UINT8 *Buffer,
+ IN UINT32 Length,
+ IN UINT16 OptTag
+ )
+{
+ EFI_DHCP6_PACKET_OPTION *Option;
+ UINT32 Offset;
+
+ Option = (EFI_DHCP6_PACKET_OPTION *) Buffer;
+ Offset = 0;
+
+ //
+ // OpLen and OpCode here are both stored in network order.
+ //
+ while (Offset < Length) {
+
+ if (NTOHS (Option->OpCode) == OptTag) {
+
+ return Option;
+ }
+
+ Offset += (NTOHS(Option->OpLen) + 4);
+ Option = (EFI_DHCP6_PACKET_OPTION *) (Buffer + Offset);
+ }
+
+ return NULL;
+}
+
+
+/**
+ Build the options buffer for the DHCPv6 request packet.
+
+ @param[in] Private The pointer to PxeBc private data.
+ @param[out] OptList The pointer to the option pointer array.
+ @param[in] Buffer The pointer to the buffer to contain the option list.
+
+ @return Index The count of the built-in options.
+
+**/
+UINT32
+PxeBcBuildDhcp6Options (
+ IN PXEBC_PRIVATE_DATA *Private,
+ OUT EFI_DHCP6_PACKET_OPTION **OptList,
+ IN UINT8 *Buffer
+ )
+{
+ PXEBC_DHCP6_OPTION_ENTRY OptEnt;
+ UINT32 Index;
+ UINT16 Value;
+
+ Index = 0;
+ OptList[0] = (EFI_DHCP6_PACKET_OPTION *) Buffer;
+
+ //
+ // Append client option request option
+ //
+ OptList[Index]->OpCode = HTONS (DHCP6_OPT_ORO);
+ OptList[Index]->OpLen = HTONS (6);
+ OptEnt.Oro = (PXEBC_DHCP6_OPTION_ORO *) OptList[Index]->Data;
+ OptEnt.Oro->OpCode[0] = HTONS(DHCP6_OPT_BOOT_FILE_URL);
+ OptEnt.Oro->OpCode[1] = HTONS(DHCP6_OPT_BOOT_FILE_PARAM);
+ OptEnt.Oro->OpCode[2] = HTONS(DHCP6_OPT_DNS_SERVERS);
+ Index++;
+ OptList[Index] = GET_NEXT_DHCP6_OPTION (OptList[Index - 1]);
+
+ //
+ // Append client network device interface option
+ //
+ OptList[Index]->OpCode = HTONS (DHCP6_OPT_UNDI);
+ OptList[Index]->OpLen = HTONS ((UINT16)3);
+ OptEnt.Undi = (PXEBC_DHCP6_OPTION_UNDI *) OptList[Index]->Data;
+
+ if (Private->Nii != NULL) {
+ OptEnt.Undi->Type = Private->Nii->Type;
+ OptEnt.Undi->MajorVer = Private->Nii->MajorVer;
+ OptEnt.Undi->MinorVer = Private->Nii->MinorVer;
+ } else {
+ OptEnt.Undi->Type = DEFAULT_UNDI_TYPE;
+ OptEnt.Undi->MajorVer = DEFAULT_UNDI_MAJOR;
+ OptEnt.Undi->MinorVer = DEFAULT_UNDI_MINOR;
+ }
+
+ Index++;
+ OptList[Index] = GET_NEXT_DHCP6_OPTION (OptList[Index - 1]);
+
+ //
+ // Append client system architecture option
+ //
+ OptList[Index]->OpCode = HTONS (DHCP6_OPT_ARCH);
+ OptList[Index]->OpLen = HTONS ((UINT16) sizeof (PXEBC_DHCP6_OPTION_ARCH));
+ OptEnt.Arch = (PXEBC_DHCP6_OPTION_ARCH *) OptList[Index]->Data;
+ Value = HTONS (EFI_PXE_CLIENT_SYSTEM_ARCHITECTURE);
+ CopyMem (&OptEnt.Arch->Type, &Value, sizeof (UINT16));
+ Index++;
+ OptList[Index] = GET_NEXT_DHCP6_OPTION (OptList[Index - 1]);
+
+ //
+ // Append vendor class option to store the PXE class identifier.
+ //
+ OptList[Index]->OpCode = HTONS (DHCP6_OPT_VENDOR_CLASS);
+ OptList[Index]->OpLen = HTONS ((UINT16) sizeof (PXEBC_DHCP6_OPTION_VENDOR_CLASS));
+ OptEnt.VendorClass = (PXEBC_DHCP6_OPTION_VENDOR_CLASS *) OptList[Index]->Data;
+ OptEnt.VendorClass->Vendor = HTONL (PXEBC_DHCP6_ENTERPRISE_NUM);
+ OptEnt.VendorClass->ClassLen = HTONS ((UINT16) sizeof (PXEBC_CLASS_ID));
+ CopyMem (
+ &OptEnt.VendorClass->ClassId,
+ DEFAULT_CLASS_ID_DATA,
+ sizeof (PXEBC_CLASS_ID)
+ );
+ PxeBcUintnToAscDecWithFormat (
+ EFI_PXE_CLIENT_SYSTEM_ARCHITECTURE,
+ OptEnt.VendorClass->ClassId.ArchitectureType,
+ sizeof (OptEnt.VendorClass->ClassId.ArchitectureType)
+ );
+
+ if (Private->Nii != NULL) {
+ CopyMem (
+ OptEnt.VendorClass->ClassId.InterfaceName,
+ Private->Nii->StringId,
+ sizeof (OptEnt.VendorClass->ClassId.InterfaceName)
+ );
+ PxeBcUintnToAscDecWithFormat (
+ Private->Nii->MajorVer,
+ OptEnt.VendorClass->ClassId.UndiMajor,
+ sizeof (OptEnt.VendorClass->ClassId.UndiMajor)
+ );
+ PxeBcUintnToAscDecWithFormat (
+ Private->Nii->MinorVer,
+ OptEnt.VendorClass->ClassId.UndiMinor,
+ sizeof (OptEnt.VendorClass->ClassId.UndiMinor)
+ );
+ }
+
+ Index++;
+
+ return Index;
+}
+
+
+/**
+ Cache the DHCPv6 packet.
+
+ @param[in] Dst The pointer to the cache buffer for DHCPv6 packet.
+ @param[in] Src The pointer to the DHCPv6 packet to be cached.
+
+ @retval EFI_SUCCESS Packet is copied.
+ @retval EFI_BUFFER_TOO_SMALL Cache buffer is not big enough to hold the packet.
+
+**/
+EFI_STATUS
+PxeBcCacheDhcp6Packet (
+ IN EFI_DHCP6_PACKET *Dst,
+ IN EFI_DHCP6_PACKET *Src
+ )
+{
+ if (Dst->Size < Src->Length) {
+ return EFI_BUFFER_TOO_SMALL;
+ }
+
+ CopyMem (&Dst->Dhcp6, &Src->Dhcp6, Src->Length);
+ Dst->Length = Src->Length;
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Free all the nodes in the list for boot file.
+
+ @param[in] Head The pointer to the head of list.
+
+**/
+VOID
+PxeBcFreeBootFileOption (
+ IN LIST_ENTRY *Head
+ )
+{
+ LIST_ENTRY *Entry;
+ LIST_ENTRY *NextEntry;
+ PXEBC_DHCP6_OPTION_NODE *Node;
+
+ NET_LIST_FOR_EACH_SAFE (Entry, NextEntry, Head) {
+ Node = NET_LIST_USER_STRUCT (Entry, PXEBC_DHCP6_OPTION_NODE, Link);
+ RemoveEntryList (Entry);
+ FreePool (Node);
+ }
+}
+
+/**
+ Retrieve the boot server address using the EFI_DNS6_PROTOCOL.
+
+ @param[in] Private Pointer to PxeBc private data.
+ @param[in] HostName Pointer to buffer containing hostname.
+ @param[out] IpAddress On output, pointer to buffer containing IPv6 address.
+
+ @retval EFI_SUCCESS Operation succeeded.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.
+ @retval EFI_DEVICE_ERROR An unexpected network error occurred.
+ @retval Others Other errors as indicated.
+
+**/
+EFI_STATUS
+PxeBcDns6 (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN CHAR16 *HostName,
+ OUT EFI_IPv6_ADDRESS *IpAddress
+ )
+{
+ EFI_STATUS Status;
+ EFI_DNS6_PROTOCOL *Dns6;
+ EFI_DNS6_CONFIG_DATA Dns6ConfigData;
+ EFI_DNS6_COMPLETION_TOKEN Token;
+ EFI_HANDLE Dns6Handle;
+ EFI_IPv6_ADDRESS *DnsServerList;
+ BOOLEAN IsDone;
+
+ Dns6 = NULL;
+ Dns6Handle = NULL;
+ DnsServerList = Private->DnsServer;
+ ZeroMem (&Token, sizeof (EFI_DNS6_COMPLETION_TOKEN));
+
+ //
+ // Create a DNSv6 child instance and get the protocol.
+ //
+ Status = NetLibCreateServiceChild (
+ Private->Controller,
+ Private->Image,
+ &gEfiDns6ServiceBindingProtocolGuid,
+ &Dns6Handle
+ );
+ if (EFI_ERROR (Status)) {
+ goto Exit;
+ }
+
+ Status = gBS->OpenProtocol (
+ Dns6Handle,
+ &gEfiDns6ProtocolGuid,
+ (VOID **) &Dns6,
+ Private->Image,
+ Private->Controller,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ goto Exit;
+ }
+
+ //
+ // Configure DNS6 instance for the DNS server address and protocol.
+ //
+ ZeroMem (&Dns6ConfigData, sizeof (EFI_DNS6_CONFIG_DATA));
+ Dns6ConfigData.DnsServerCount = 1;
+ Dns6ConfigData.DnsServerList = DnsServerList;
+ Dns6ConfigData.EnableDnsCache = TRUE;
+ Dns6ConfigData.Protocol = EFI_IP_PROTO_UDP;
+ IP6_COPY_ADDRESS (&Dns6ConfigData.StationIp, &Private->TmpStationIp.v6);
+ Status = Dns6->Configure (
+ Dns6,
+ &Dns6ConfigData
+ );
+ if (EFI_ERROR (Status)) {
+ goto Exit;
+ }
+
+ Token.Status = EFI_NOT_READY;
+ IsDone = FALSE;
+ //
+ // Create event to set the IsDone flag when name resolution is finished.
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ PxeBcCommonNotify,
+ &IsDone,
+ &Token.Event
+ );
+ if (EFI_ERROR (Status)) {
+ goto Exit;
+ }
+
+ //
+ // Start asynchronous name resolution.
+ //
+ Status = Dns6->HostNameToIp (Dns6, HostName, &Token);
+ if (EFI_ERROR (Status)) {
+ goto Exit;
+ }
+
+ while (!IsDone) {
+ Dns6->Poll (Dns6);
+ }
+
+ //
+ // Name resolution is done, check result.
+ //
+ Status = Token.Status;
+ if (!EFI_ERROR (Status)) {
+ if (Token.RspData.H2AData == NULL) {
+ Status = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
+ if (Token.RspData.H2AData->IpCount == 0 || Token.RspData.H2AData->IpList == NULL) {
+ Status = EFI_DEVICE_ERROR;
+ goto Exit;
+ }
+ //
+ // We just return the first IPv6 address from DNS protocol.
+ //
+ IP6_COPY_ADDRESS (IpAddress, Token.RspData.H2AData->IpList);
+ Status = EFI_SUCCESS;
+ }
+
+Exit:
+ FreePool (HostName);
+
+ if (Token.Event != NULL) {
+ gBS->CloseEvent (Token.Event);
+ }
+ if (Token.RspData.H2AData != NULL) {
+ if (Token.RspData.H2AData->IpList != NULL) {
+ FreePool (Token.RspData.H2AData->IpList);
+ }
+ FreePool (Token.RspData.H2AData);
+ }
+
+ if (Dns6 != NULL) {
+ Dns6->Configure (Dns6, NULL);
+
+ gBS->CloseProtocol (
+ Dns6Handle,
+ &gEfiDns6ProtocolGuid,
+ Private->Image,
+ Private->Controller
+ );
+ }
+
+ if (Dns6Handle != NULL) {
+ NetLibDestroyServiceChild (
+ Private->Controller,
+ Private->Image,
+ &gEfiDns6ServiceBindingProtocolGuid,
+ Dns6Handle
+ );
+ }
+
+ if (DnsServerList != NULL) {
+ FreePool (DnsServerList);
+ }
+
+ return Status;
+}
+
+/**
+ Parse the Boot File URL option.
+
+ @param[in] Private Pointer to PxeBc private data.
+ @param[out] FileName The pointer to the boot file name.
+ @param[in, out] SrvAddr The pointer to the boot server address.
+ @param[in] BootFile The pointer to the boot file URL option data.
+ @param[in] Length The length of the boot file URL option data.
+
+ @retval EFI_ABORTED User cancel operation.
+ @retval EFI_SUCCESS Selected the boot menu successfully.
+ @retval EFI_NOT_READY Read the input key from the keybroad has not finish.
+
+**/
+EFI_STATUS
+PxeBcExtractBootFileUrl (
+ IN PXEBC_PRIVATE_DATA *Private,
+ OUT UINT8 **FileName,
+ IN OUT EFI_IPv6_ADDRESS *SrvAddr,
+ IN CHAR8 *BootFile,
+ IN UINT16 Length
+ )
+{
+ UINT16 PrefixLen;
+ CHAR8 *BootFileNamePtr;
+ CHAR8 *BootFileName;
+ UINT16 BootFileNameLen;
+ CHAR8 *TmpStr;
+ CHAR8 TmpChar;
+ CHAR8 *ServerAddressOption;
+ CHAR8 *ServerAddress;
+ CHAR8 *ModeStr;
+ CHAR16 *HostName;
+ BOOLEAN IpExpressedUrl;
+ UINTN Len;
+ EFI_STATUS Status;
+
+ IpExpressedUrl = TRUE;
+ //
+ // The format of the Boot File URL option is:
+ //
+ // 0 1 2 3
+ // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ // | OPT_BOOTFILE_URL | option-len |
+ // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ // | |
+ // . bootfile-url (variable length) .
+ // | |
+ // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ //
+
+ //
+ // Based upon RFC 5970 and UEFI 2.6, bootfile-url format can be
+ // tftp://[SERVER_ADDRESS]/BOOTFILE_NAME or tftp://domain_name/BOOTFILE_NAME
+ // As an example where the BOOTFILE_NAME is the EFI loader and
+ // SERVER_ADDRESS is the ASCII encoding of an IPV6 address.
+ //
+ PrefixLen = (UINT16) AsciiStrLen (PXEBC_DHCP6_BOOT_FILE_URL_PREFIX);
+
+ if (Length <= PrefixLen ||
+ CompareMem (BootFile, PXEBC_DHCP6_BOOT_FILE_URL_PREFIX, PrefixLen) != 0) {
+ return EFI_NOT_FOUND;
+ }
+
+ BootFile = BootFile + PrefixLen;
+ Length = (UINT16) (Length - PrefixLen);
+
+ TmpStr = (CHAR8 *) AllocateZeroPool (Length + 1);
+ if (TmpStr == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ CopyMem (TmpStr, BootFile, Length);
+ TmpStr[Length] = '\0';
+
+ //
+ // Get the part of SERVER_ADDRESS string.
+ //
+ ServerAddressOption = TmpStr;
+ if (*ServerAddressOption == PXEBC_ADDR_START_DELIMITER) {
+ ServerAddressOption ++;
+ ServerAddress = ServerAddressOption;
+ while (*ServerAddress != '\0' && *ServerAddress != PXEBC_ADDR_END_DELIMITER) {
+ ServerAddress++;
+ }
+
+ if (*ServerAddress != PXEBC_ADDR_END_DELIMITER) {
+ FreePool (TmpStr);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ *ServerAddress = '\0';
+
+ //
+ // Convert the string of server address to Ipv6 address format and store it.
+ //
+ Status = NetLibAsciiStrToIp6 (ServerAddressOption, SrvAddr);
+ if (EFI_ERROR (Status)) {
+ FreePool (TmpStr);
+ return Status;
+ }
+
+ } else {
+ IpExpressedUrl = FALSE;
+ ServerAddress = ServerAddressOption;
+ while (*ServerAddress != '\0' && *ServerAddress != PXEBC_TFTP_URL_SEPARATOR) {
+ ServerAddress++;
+ }
+
+ if (*ServerAddress != PXEBC_TFTP_URL_SEPARATOR) {
+ FreePool (TmpStr);
+ return EFI_INVALID_PARAMETER;
+ }
+ *ServerAddress = '\0';
+
+ Len = AsciiStrSize (ServerAddressOption);
+ HostName = AllocateZeroPool (Len * sizeof (CHAR16));
+ if (HostName == NULL) {
+ FreePool (TmpStr);
+ return EFI_OUT_OF_RESOURCES;
+ }
+ AsciiStrToUnicodeStrS (
+ ServerAddressOption,
+ HostName,
+ Len
+ );
+
+ //
+ // Perform DNS resolution.
+ //
+ Status = PxeBcDns6 (Private,HostName, SrvAddr);
+ if (EFI_ERROR (Status)) {
+ FreePool (TmpStr);
+ return Status;
+ }
+ }
+
+ //
+ // Get the part of BOOTFILE_NAME string.
+ //
+ BootFileNamePtr = (CHAR8*)((UINTN)ServerAddress + 1);
+ if (IpExpressedUrl) {
+ if (*BootFileNamePtr != PXEBC_TFTP_URL_SEPARATOR) {
+ FreePool (TmpStr);
+ return EFI_INVALID_PARAMETER;
+ }
+ ++BootFileNamePtr;
+ }
+
+ BootFileNameLen = (UINT16)(Length - (UINT16) ((UINTN)BootFileNamePtr - (UINTN)TmpStr) + 1);
+ if (BootFileNameLen != 0 || FileName != NULL) {
+ //
+ // Remove trailing mode=octet if present and ignore. All other modes are
+ // invalid for netboot6, so reject them.
+ //
+ ModeStr = AsciiStrStr (BootFileNamePtr, ";mode=octet");
+ if (ModeStr != NULL && *(ModeStr + AsciiStrLen (";mode=octet")) == '\0') {
+ *ModeStr = '\0';
+ } else if (AsciiStrStr (BootFileNamePtr, ";mode=") != NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Extract boot file name from URL.
+ //
+ BootFileName = (CHAR8 *) AllocateZeroPool (BootFileNameLen);
+ if (BootFileName == NULL) {
+ FreePool (TmpStr);
+ return EFI_OUT_OF_RESOURCES;
+ }
+ *FileName = (UINT8*) BootFileName;
+
+ //
+ // Decode percent-encoding in boot file name.
+ //
+ while (*BootFileNamePtr != '\0') {
+ if (*BootFileNamePtr == '%') {
+ TmpChar = *(BootFileNamePtr+ 3);
+ *(BootFileNamePtr+ 3) = '\0';
+ *BootFileName = (UINT8) AsciiStrHexToUintn ((CHAR8*)(BootFileNamePtr + 1));
+ BootFileName++;
+ *(BootFileNamePtr+ 3) = TmpChar;
+ BootFileNamePtr += 3;
+ } else {
+ *BootFileName = *BootFileNamePtr;
+ BootFileName++;
+ BootFileNamePtr++;
+ }
+ }
+ *BootFileName = '\0';
+ }
+
+ FreePool (TmpStr);
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Parse the Boot File Parameter option.
+
+ @param[in] BootFilePara The pointer to boot file parameter option data.
+ @param[out] BootFileSize The pointer to the parsed boot file size.
+
+ @retval EFI_SUCCESS Successfully obtained the boot file size from parameter option.
+ @retval EFI_NOT_FOUND Failed to extract the boot file size from parameter option.
+
+**/
+EFI_STATUS
+PxeBcExtractBootFileParam (
+ IN CHAR8 *BootFilePara,
+ OUT UINT16 *BootFileSize
+ )
+{
+ UINT16 Length;
+ UINT8 Index;
+ UINT8 Digit;
+ UINT32 Size;
+
+ CopyMem (&Length, BootFilePara, sizeof (UINT16));
+ Length = NTOHS (Length);
+
+ //
+ // The BootFile Size should be 1~5 byte ASCII strings
+ //
+ if (Length < 1 || Length > 5) {
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // Extract the value of BootFile Size.
+ //
+ BootFilePara = BootFilePara + sizeof (UINT16);
+ Size = 0;
+ for (Index = 0; Index < Length; Index++) {
+ if (EFI_ERROR (PxeBcUniHexToUint8 (&Digit, *(BootFilePara + Index)))) {
+ return EFI_NOT_FOUND;
+ }
+
+ Size = (Size + Digit) * 10;
+ }
+
+ Size = Size / 10;
+ if (Size > PXEBC_DHCP6_MAX_BOOT_FILE_SIZE) {
+ return EFI_NOT_FOUND;
+ }
+
+ *BootFileSize = (UINT16) Size;
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Parse the cached DHCPv6 packet, including all the options.
+
+ @param[in] Cache6 The pointer to a cached DHCPv6 packet.
+
+ @retval EFI_SUCCESS Parsed the DHCPv6 packet successfully.
+ @retval EFI_DEVICE_ERROR Failed to parse and invalid the packet.
+
+**/
+EFI_STATUS
+PxeBcParseDhcp6Packet (
+ IN PXEBC_DHCP6_PACKET_CACHE *Cache6
+ )
+{
+ EFI_DHCP6_PACKET *Offer;
+ EFI_DHCP6_PACKET_OPTION **Options;
+ EFI_DHCP6_PACKET_OPTION *Option;
+ PXEBC_OFFER_TYPE OfferType;
+ BOOLEAN IsProxyOffer;
+ BOOLEAN IsPxeOffer;
+ UINT32 Offset;
+ UINT32 Length;
+ UINT32 EnterpriseNum;
+
+ IsProxyOffer = TRUE;
+ IsPxeOffer = FALSE;
+ Offer = &Cache6->Packet.Offer;
+ Options = Cache6->OptList;
+
+ ZeroMem (Cache6->OptList, sizeof (Cache6->OptList));
+
+ Option = (EFI_DHCP6_PACKET_OPTION *) (Offer->Dhcp6.Option);
+ Offset = 0;
+ Length = GET_DHCP6_OPTION_SIZE (Offer);
+
+ //
+ // OpLen and OpCode here are both stored in network order, since they are from original packet.
+ //
+ while (Offset < Length) {
+
+ if (NTOHS (Option->OpCode) == DHCP6_OPT_IA_NA) {
+ Options[PXEBC_DHCP6_IDX_IA_NA] = Option;
+ } else if (NTOHS (Option->OpCode) == DHCP6_OPT_BOOT_FILE_URL) {
+ //
+ // The server sends this option to inform the client about an URL to a boot file.
+ //
+ Options[PXEBC_DHCP6_IDX_BOOT_FILE_URL] = Option;
+ } else if (NTOHS (Option->OpCode) == DHCP6_OPT_BOOT_FILE_PARAM) {
+ Options[PXEBC_DHCP6_IDX_BOOT_FILE_PARAM] = Option;
+ } else if (NTOHS (Option->OpCode) == DHCP6_OPT_VENDOR_CLASS) {
+ Options[PXEBC_DHCP6_IDX_VENDOR_CLASS] = Option;
+ } else if (NTOHS (Option->OpCode) == DHCP6_OPT_DNS_SERVERS) {
+ Options[PXEBC_DHCP6_IDX_DNS_SERVER] = Option;
+ }
+
+ Offset += (NTOHS (Option->OpLen) + 4);
+ Option = (EFI_DHCP6_PACKET_OPTION *) (Offer->Dhcp6.Option + Offset);
+ }
+
+ //
+ // The offer with assigned client address is NOT a proxy offer.
+ // An ia_na option, embeded with valid ia_addr option and a status_code of success.
+ //
+ Option = Options[PXEBC_DHCP6_IDX_IA_NA];
+ if (Option != NULL) {
+ Option = PxeBcParseDhcp6Options (
+ Option->Data + 12,
+ NTOHS (Option->OpLen),
+ DHCP6_OPT_STATUS_CODE
+ );
+ if ((Option != NULL && Option->Data[0] == 0) || (Option == NULL)) {
+ IsProxyOffer = FALSE;
+ }
+ }
+
+ //
+ // The offer with "PXEClient" is a pxe offer.
+ //
+ Option = Options[PXEBC_DHCP6_IDX_VENDOR_CLASS];
+ EnterpriseNum = HTONL(PXEBC_DHCP6_ENTERPRISE_NUM);
+
+ if (Option != NULL &&
+ NTOHS(Option->OpLen) >= 13 &&
+ CompareMem (Option->Data, &EnterpriseNum, sizeof (UINT32)) == 0 &&
+ CompareMem (&Option->Data[6], DEFAULT_CLASS_ID_DATA, 9) == 0) {
+ IsPxeOffer = TRUE;
+ }
+
+ //
+ // Determine offer type of the dhcp6 packet.
+ //
+ if (IsPxeOffer) {
+ //
+ // It's a binl offer only with PXEClient.
+ //
+ OfferType = IsProxyOffer ? PxeOfferTypeProxyBinl : PxeOfferTypeDhcpBinl;
+ } else {
+ //
+ // It's a dhcp only offer, which is a pure dhcp6 offer packet.
+ //
+ OfferType = PxeOfferTypeDhcpOnly;
+ }
+
+ Cache6->OfferType = OfferType;
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Cache the DHCPv6 ack packet, and parse it on demand.
+
+ @param[in] Private The pointer to PxeBc private data.
+ @param[in] Ack The pointer to the DHCPv6 ack packet.
+ @param[in] Verified If TRUE, parse the ACK packet and store info into mode data.
+
+ @retval EFI_SUCCESS Cache and parse the packet successfully.
+ @retval EFI_BUFFER_TOO_SMALL Cache buffer is not big enough to hold the packet.
+
+**/
+EFI_STATUS
+PxeBcCopyDhcp6Ack (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN EFI_DHCP6_PACKET *Ack,
+ IN BOOLEAN Verified
+ )
+{
+ EFI_PXE_BASE_CODE_MODE *Mode;
+ EFI_STATUS Status;
+
+ Mode = Private->PxeBc.Mode;
+
+ Status = PxeBcCacheDhcp6Packet (&Private->DhcpAck.Dhcp6.Packet.Ack, Ack);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (Verified) {
+ //
+ // Parse the ack packet and store it into mode data if needed.
+ //
+ PxeBcParseDhcp6Packet (&Private->DhcpAck.Dhcp6);
+ CopyMem (&Mode->DhcpAck.Dhcpv6, &Ack->Dhcp6, Ack->Length);
+ Mode->DhcpAckReceived = TRUE;
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Cache the DHCPv6 proxy offer packet according to the received order.
+
+ @param[in] Private The pointer to PxeBc private data.
+ @param[in] OfferIndex The received order of offer packets.
+
+ @retval EFI_SUCCESS Cache and parse the packet successfully.
+ @retval EFI_BUFFER_TOO_SMALL Cache buffer is not big enough to hold the packet.
+
+**/
+EFI_STATUS
+PxeBcCopyDhcp6Proxy (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN UINT32 OfferIndex
+ )
+{
+ EFI_PXE_BASE_CODE_MODE *Mode;
+ EFI_DHCP6_PACKET *Offer;
+ EFI_STATUS Status;
+
+ ASSERT (OfferIndex < Private->OfferNum);
+ ASSERT (OfferIndex < PXEBC_OFFER_MAX_NUM);
+
+ Mode = Private->PxeBc.Mode;
+ Offer = &Private->OfferBuffer[OfferIndex].Dhcp6.Packet.Offer;
+
+ //
+ // Cache the proxy offer packet and parse it.
+ //
+ Status = PxeBcCacheDhcp6Packet (&Private->ProxyOffer.Dhcp6.Packet.Offer, Offer);
+ if (EFI_ERROR(Status)) {
+ return Status;
+ }
+ PxeBcParseDhcp6Packet (&Private->ProxyOffer.Dhcp6);
+
+ //
+ // Store this packet into mode data.
+ //
+ CopyMem (&Mode->ProxyOffer.Dhcpv6, &Offer->Dhcp6, Offer->Length);
+ Mode->ProxyOfferReceived = TRUE;
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Seek the address of the first byte of the option header.
+
+ @param[in] Buf The pointer to the buffer.
+ @param[in] SeekLen The length to seek.
+ @param[in] OptType The option type.
+
+ @retval NULL If it failed to seek the option.
+ @retval others The position to the option.
+
+**/
+UINT8 *
+PxeBcDhcp6SeekOption (
+ IN UINT8 *Buf,
+ IN UINT32 SeekLen,
+ IN UINT16 OptType
+ )
+{
+ UINT8 *Cursor;
+ UINT8 *Option;
+ UINT16 DataLen;
+ UINT16 OpCode;
+
+ Option = NULL;
+ Cursor = Buf;
+
+ while (Cursor < Buf + SeekLen) {
+ OpCode = ReadUnaligned16 ((UINT16 *) Cursor);
+ if (OpCode == HTONS (OptType)) {
+ Option = Cursor;
+ break;
+ }
+ DataLen = NTOHS (ReadUnaligned16 ((UINT16 *) (Cursor + 2)));
+ Cursor += (DataLen + 4);
+ }
+
+ return Option;
+}
+
+
+/**
+ Build and send out the request packet for the bootfile, and parse the reply.
+
+ @param[in] Private The pointer to PxeBc private data.
+ @param[in] Index PxeBc option boot item type.
+
+ @retval EFI_SUCCESS Successfully discovered the boot file.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resources.
+ @retval EFI_NOT_FOUND Can't get the PXE reply packet.
+ @retval Others Failed to discover the boot file.
+
+**/
+EFI_STATUS
+PxeBcRequestBootService (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN UINT32 Index
+ )
+{
+ EFI_PXE_BASE_CODE_UDP_PORT SrcPort;
+ EFI_PXE_BASE_CODE_UDP_PORT DestPort;
+ EFI_PXE_BASE_CODE_PROTOCOL *PxeBc;
+ EFI_PXE_BASE_CODE_DHCPV6_PACKET *Discover;
+ UINTN DiscoverLen;
+ EFI_DHCP6_PACKET *Request;
+ UINTN RequestLen;
+ EFI_DHCP6_PACKET *Reply;
+ UINT8 *RequestOpt;
+ UINT8 *DiscoverOpt;
+ UINTN ReadSize;
+ UINT16 OpFlags;
+ UINT16 OpCode;
+ UINT16 OpLen;
+ EFI_STATUS Status;
+ EFI_DHCP6_PACKET *ProxyOffer;
+ UINT8 *Option;
+
+ PxeBc = &Private->PxeBc;
+ Request = Private->Dhcp6Request;
+ ProxyOffer = &Private->OfferBuffer[Index].Dhcp6.Packet.Offer;
+ SrcPort = PXEBC_BS_DISCOVER_PORT;
+ DestPort = PXEBC_BS_DISCOVER_PORT;
+ OpFlags = 0;
+
+ if (Request == NULL) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ Discover = AllocateZeroPool (sizeof (EFI_PXE_BASE_CODE_DHCPV6_PACKET));
+ if (Discover == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ //
+ // Build the request packet by the cached request packet before.
+ //
+ Discover->TransactionId = ProxyOffer->Dhcp6.Header.TransactionId;
+ Discover->MessageType = Request->Dhcp6.Header.MessageType;
+ RequestOpt = Request->Dhcp6.Option;
+ DiscoverOpt = Discover->DhcpOptions;
+ DiscoverLen = sizeof (EFI_DHCP6_HEADER);
+ RequestLen = DiscoverLen;
+
+ //
+ // Find Server ID Option from ProxyOffer.
+ //
+ Option = PxeBcDhcp6SeekOption (
+ ProxyOffer->Dhcp6.Option,
+ ProxyOffer->Length - 4,
+ DHCP6_OPT_SERVER_ID
+ );
+ if (Option == NULL) {
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // Add Server ID Option.
+ //
+ OpLen = NTOHS (((EFI_DHCP6_PACKET_OPTION *) Option)->OpLen);
+ CopyMem (DiscoverOpt, Option, OpLen + 4);
+ DiscoverOpt += (OpLen + 4);
+ DiscoverLen += (OpLen + 4);
+
+ while (RequestLen < Request->Length) {
+ OpCode = NTOHS (((EFI_DHCP6_PACKET_OPTION *) RequestOpt)->OpCode);
+ OpLen = NTOHS (((EFI_DHCP6_PACKET_OPTION *) RequestOpt)->OpLen);
+ if (OpCode != EFI_DHCP6_IA_TYPE_NA &&
+ OpCode != EFI_DHCP6_IA_TYPE_TA &&
+ OpCode != DHCP6_OPT_SERVER_ID
+ ) {
+ //
+ // Copy all the options except IA option and Server ID
+ //
+ CopyMem (DiscoverOpt, RequestOpt, OpLen + 4);
+ DiscoverOpt += (OpLen + 4);
+ DiscoverLen += (OpLen + 4);
+ }
+ RequestOpt += (OpLen + 4);
+ RequestLen += (OpLen + 4);
+ }
+
+ //
+ // Update Elapsed option in the package
+ //
+ Option = PxeBcDhcp6SeekOption (
+ Discover->DhcpOptions,
+ (UINT32)(RequestLen - 4),
+ DHCP6_OPT_ELAPSED_TIME
+ );
+ if (Option != NULL) {
+ CalcElapsedTime (Private);
+ WriteUnaligned16 ((UINT16*)(Option + 4), HTONS((UINT16) Private->ElapsedTime));
+ }
+
+ Status = PxeBc->UdpWrite (
+ PxeBc,
+ OpFlags,
+ &Private->ServerIp,
+ &DestPort,
+ NULL,
+ &Private->StationIp,
+ &SrcPort,
+ NULL,
+ NULL,
+ &DiscoverLen,
+ (VOID *) Discover
+ );
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Cache the right PXE reply packet here, set valid flag later.
+ // Especially for PXE discover packet, store it into mode data here.
+ //
+ Reply = &Private->ProxyOffer.Dhcp6.Packet.Offer;
+ ReadSize = (UINTN) Reply->Size;
+
+ //
+ // Start Udp6Read instance
+ //
+ Status = Private->Udp6Read->Configure (Private->Udp6Read, &Private->Udp6CfgData);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = PxeBc->UdpRead (
+ PxeBc,
+ EFI_PXE_BASE_CODE_UDP_OPFLAGS_ANY_SRC_IP | EFI_PXE_BASE_CODE_UDP_OPFLAGS_ANY_DEST_IP,
+ NULL,
+ &SrcPort,
+ &Private->ServerIp,
+ &DestPort,
+ NULL,
+ NULL,
+ &ReadSize,
+ (VOID *) &Reply->Dhcp6
+ );
+ //
+ // Stop Udp6Read instance
+ //
+ Private->Udp6Read->Configure (Private->Udp6Read, NULL);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Update length
+ //
+ Reply->Length = (UINT32) ReadSize;
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Retry to request bootfile name by the BINL offer.
+
+ @param[in] Private The pointer to PxeBc private data.
+ @param[in] Index The received order of offer packets.
+
+ @retval EFI_SUCCESS Successfully retried a request for the bootfile name.
+ @retval EFI_DEVICE_ERROR Failed to retry the bootfile name.
+
+**/
+EFI_STATUS
+PxeBcRetryDhcp6Binl (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN UINT32 Index
+ )
+{
+ EFI_PXE_BASE_CODE_MODE *Mode;
+ PXEBC_DHCP6_PACKET_CACHE *Offer;
+ PXEBC_DHCP6_PACKET_CACHE *Cache6;
+ EFI_STATUS Status;
+
+ ASSERT (Index < PXEBC_OFFER_MAX_NUM);
+ ASSERT (Private->OfferBuffer[Index].Dhcp6.OfferType == PxeOfferTypeDhcpBinl ||
+ Private->OfferBuffer[Index].Dhcp6.OfferType == PxeOfferTypeProxyBinl);
+
+ Mode = Private->PxeBc.Mode;
+ Private->IsDoDiscover = FALSE;
+ Offer = &Private->OfferBuffer[Index].Dhcp6;
+ if (Offer->OfferType == PxeOfferTypeDhcpBinl) {
+ //
+ // There is no BootFileUrl option in dhcp6 offer, so use servers multi-cast address instead.
+ //
+ CopyMem (
+ &Private->ServerIp.v6,
+ &mAllDhcpRelayAndServersAddress,
+ sizeof (EFI_IPv6_ADDRESS)
+ );
+ } else {
+ ASSERT (Offer->OptList[PXEBC_DHCP6_IDX_BOOT_FILE_URL] != NULL);
+ //
+ // Parse out the next server address from the last offer, and store it
+ //
+ Status = PxeBcExtractBootFileUrl (
+ Private,
+ &Private->BootFileName,
+ &Private->ServerIp.v6,
+ (CHAR8 *) (Offer->OptList[PXEBC_DHCP6_IDX_BOOT_FILE_URL]->Data),
+ NTOHS (Offer->OptList[PXEBC_DHCP6_IDX_BOOT_FILE_URL]->OpLen)
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+
+ //
+ // Retry Dhcp6Binl again for the bootfile, and the reply cached into Private->ProxyOffer.
+ //
+ Status = PxeBcRequestBootService (Private, Index);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Cache6 = &Private->ProxyOffer.Dhcp6;
+ Status = PxeBcParseDhcp6Packet (Cache6);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (Cache6->OfferType != PxeOfferTypeProxyPxe10 &&
+ Cache6->OfferType != PxeOfferTypeProxyWfm11a &&
+ Cache6->OptList[PXEBC_DHCP6_IDX_BOOT_FILE_URL] == NULL) {
+ //
+ // This BINL ack doesn't have discovery option set or multicast option set
+ // or bootfile name specified.
+ //
+ return EFI_DEVICE_ERROR;
+ }
+
+ Mode->ProxyOfferReceived = TRUE;
+ CopyMem (
+ &Mode->ProxyOffer.Dhcpv6,
+ &Cache6->Packet.Offer.Dhcp6,
+ Cache6->Packet.Offer.Length
+ );
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Cache all the received DHCPv6 offers, and set OfferIndex and OfferCount.
+
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.
+ @param[in] RcvdOffer The pointer to the received offer packet.
+
+ @retval EFI_SUCCESS Cache and parse the packet successfully.
+ @retval Others Operation failed.
+**/
+EFI_STATUS
+PxeBcCacheDhcp6Offer (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN EFI_DHCP6_PACKET *RcvdOffer
+ )
+{
+ PXEBC_DHCP6_PACKET_CACHE *Cache6;
+ EFI_DHCP6_PACKET *Offer;
+ PXEBC_OFFER_TYPE OfferType;
+ EFI_STATUS Status;
+
+ Cache6 = &Private->OfferBuffer[Private->OfferNum].Dhcp6;
+ Offer = &Cache6->Packet.Offer;
+
+ //
+ // Cache the content of DHCPv6 packet firstly.
+ //
+ Status = PxeBcCacheDhcp6Packet (Offer, RcvdOffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Validate the DHCPv6 packet, and parse the options and offer type.
+ //
+ if (EFI_ERROR (PxeBcParseDhcp6Packet (Cache6))) {
+ return EFI_ABORTED;
+ }
+
+ //
+ // Determine whether cache the current offer by type, and record OfferIndex and OfferCount.
+ //
+ OfferType = Cache6->OfferType;
+ ASSERT (OfferType < PxeOfferTypeMax);
+ ASSERT (Private->OfferCount[OfferType] < PXEBC_OFFER_MAX_NUM);
+
+ if (IS_PROXY_OFFER (OfferType)) {
+ //
+ // It's a proxy offer without yiaddr, including PXE10, WFM11a or BINL offer.
+ //
+ Private->IsProxyRecved = TRUE;
+
+ if (OfferType == PxeOfferTypeProxyBinl) {
+ //
+ // Cache all proxy BINL offers.
+ //
+ Private->OfferIndex[OfferType][Private->OfferCount[OfferType]] = Private->OfferNum;
+ Private->OfferCount[OfferType]++;
+ } else if (Private->OfferCount[OfferType] > 0) {
+ //
+ // Only cache the first PXE10/WFM11a offer, and discard the others.
+ //
+ Private->OfferIndex[OfferType][0] = Private->OfferNum;
+ Private->OfferCount[OfferType] = 1;
+ } else {
+ return EFI_ABORTED;
+ }
+ } else {
+ //
+ // It's a DHCPv6 offer with yiaddr, and cache them all.
+ //
+ Private->OfferIndex[OfferType][Private->OfferCount[OfferType]] = Private->OfferNum;
+ Private->OfferCount[OfferType]++;
+ }
+
+ Private->OfferNum++;
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Select an DHCPv6 offer, and record SelectIndex and SelectProxyType.
+
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.
+
+**/
+VOID
+PxeBcSelectDhcp6Offer (
+ IN PXEBC_PRIVATE_DATA *Private
+ )
+{
+ UINT32 Index;
+ UINT32 OfferIndex;
+ PXEBC_OFFER_TYPE OfferType;
+
+ Private->SelectIndex = 0;
+
+ if (Private->IsOfferSorted) {
+ //
+ // Select offer by default policy.
+ //
+ if (Private->OfferCount[PxeOfferTypeDhcpPxe10] > 0) {
+ //
+ // 1. DhcpPxe10 offer
+ //
+ Private->SelectIndex = Private->OfferIndex[PxeOfferTypeDhcpPxe10][0] + 1;
+
+ } else if (Private->OfferCount[PxeOfferTypeDhcpWfm11a] > 0) {
+ //
+ // 2. DhcpWfm11a offer
+ //
+ Private->SelectIndex = Private->OfferIndex[PxeOfferTypeDhcpWfm11a][0] + 1;
+
+ } else if (Private->OfferCount[PxeOfferTypeDhcpOnly] > 0 &&
+ Private->OfferCount[PxeOfferTypeProxyPxe10] > 0) {
+ //
+ // 3. DhcpOnly offer and ProxyPxe10 offer.
+ //
+ Private->SelectIndex = Private->OfferIndex[PxeOfferTypeDhcpOnly][0] + 1;
+ Private->SelectProxyType = PxeOfferTypeProxyPxe10;
+
+ } else if (Private->OfferCount[PxeOfferTypeDhcpOnly] > 0 &&
+ Private->OfferCount[PxeOfferTypeProxyWfm11a] > 0) {
+ //
+ // 4. DhcpOnly offer and ProxyWfm11a offer.
+ //
+ Private->SelectIndex = Private->OfferIndex[PxeOfferTypeDhcpOnly][0] + 1;
+ Private->SelectProxyType = PxeOfferTypeProxyWfm11a;
+
+ } else if (Private->OfferCount[PxeOfferTypeDhcpBinl] > 0) {
+ //
+ // 5. DhcpBinl offer.
+ //
+ Private->SelectIndex = Private->OfferIndex[PxeOfferTypeDhcpBinl][0] + 1;
+
+ } else if (Private->OfferCount[PxeOfferTypeDhcpOnly] > 0 &&
+ Private->OfferCount[PxeOfferTypeProxyBinl] > 0) {
+ //
+ // 6. DhcpOnly offer and ProxyBinl offer.
+ //
+ Private->SelectIndex = Private->OfferIndex[PxeOfferTypeDhcpOnly][0] + 1;
+ Private->SelectProxyType = PxeOfferTypeProxyBinl;
+
+ } else {
+ //
+ // 7. DhcpOnly offer with bootfilename.
+ //
+ for (Index = 0; Index < Private->OfferCount[PxeOfferTypeDhcpOnly]; Index++) {
+ OfferIndex = Private->OfferIndex[PxeOfferTypeDhcpOnly][Index];
+ if (Private->OfferBuffer[OfferIndex].Dhcp6.OptList[PXEBC_DHCP6_IDX_BOOT_FILE_URL] != NULL) {
+ Private->SelectIndex = OfferIndex + 1;
+ break;
+ }
+ }
+ }
+ } else {
+ //
+ // Select offer by received order.
+ //
+ for (Index = 0; Index < Private->OfferNum; Index++) {
+
+ OfferType = Private->OfferBuffer[Index].Dhcp6.OfferType;
+
+ if (IS_PROXY_OFFER (OfferType)) {
+ //
+ // Skip proxy offers
+ //
+ continue;
+ }
+
+ if (!Private->IsProxyRecved &&
+ OfferType == PxeOfferTypeDhcpOnly &&
+ Private->OfferBuffer[Index].Dhcp6.OptList[PXEBC_DHCP6_IDX_BOOT_FILE_URL] == NULL) {
+ //
+ // Skip if DhcpOnly offer without any other proxy offers or bootfilename.
+ //
+ continue;
+ }
+
+ Private->SelectIndex = Index + 1;
+ break;
+ }
+ }
+}
+
+
+/**
+ Handle the DHCPv6 offer packet.
+
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.
+
+ @retval EFI_SUCCESS Handled the DHCPv6 offer packet successfully.
+ @retval EFI_NO_RESPONSE No response to the following request packet.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resources.
+ @retval EFI_BUFFER_TOO_SMALL Can't cache the offer pacet.
+
+**/
+EFI_STATUS
+PxeBcHandleDhcp6Offer (
+ IN PXEBC_PRIVATE_DATA *Private
+ )
+{
+ PXEBC_DHCP6_PACKET_CACHE *Cache6;
+ EFI_STATUS Status;
+ PXEBC_OFFER_TYPE OfferType;
+ UINT32 ProxyIndex;
+ UINT32 SelectIndex;
+ UINT32 Index;
+
+ ASSERT (Private->SelectIndex > 0);
+ SelectIndex = (UINT32) (Private->SelectIndex - 1);
+ ASSERT (SelectIndex < PXEBC_OFFER_MAX_NUM);
+ Cache6 = &Private->OfferBuffer[SelectIndex].Dhcp6;
+ Status = EFI_SUCCESS;
+
+ //
+ // First try to cache DNS server address if DHCP6 offer provides.
+ //
+ if (Cache6->OptList[PXEBC_DHCP6_IDX_DNS_SERVER] != NULL) {
+ Private->DnsServer = AllocateZeroPool (NTOHS (Cache6->OptList[PXEBC_DHCP6_IDX_DNS_SERVER]->OpLen));
+ if (Private->DnsServer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ CopyMem (Private->DnsServer, Cache6->OptList[PXEBC_DHCP6_IDX_DNS_SERVER]->Data, sizeof (EFI_IPv6_ADDRESS));
+ }
+
+ if (Cache6->OfferType == PxeOfferTypeDhcpBinl) {
+ //
+ // DhcpBinl offer is selected, so need try to request bootfilename by this offer.
+ //
+ if (EFI_ERROR (PxeBcRetryDhcp6Binl (Private, SelectIndex))) {
+ Status = EFI_NO_RESPONSE;
+ }
+ } else if (Cache6->OfferType == PxeOfferTypeDhcpOnly) {
+
+ if (Private->IsProxyRecved) {
+ //
+ // DhcpOnly offer is selected, so need try to request bootfilename.
+ //
+ ProxyIndex = 0;
+ if (Private->IsOfferSorted) {
+ //
+ // The proxy offer should be determined if select by default policy.
+ // IsOfferSorted means all offers are labeled by OfferIndex.
+ //
+ ASSERT (Private->OfferCount[Private->SelectProxyType] > 0);
+
+ if (Private->SelectProxyType == PxeOfferTypeProxyBinl) {
+ //
+ // Try all the cached ProxyBinl offer one by one to request bootfilename.
+ //
+ for (Index = 0; Index < Private->OfferCount[Private->SelectProxyType]; Index++) {
+
+ ProxyIndex = Private->OfferIndex[Private->SelectProxyType][Index];
+ if (!EFI_ERROR (PxeBcRetryDhcp6Binl (Private, ProxyIndex))) {
+ break;
+ }
+ }
+ if (Index == Private->OfferCount[Private->SelectProxyType]) {
+ Status = EFI_NO_RESPONSE;
+ }
+ } else {
+ //
+ // For other proxy offers (pxe10 or wfm11a), only one is buffered.
+ //
+ ProxyIndex = Private->OfferIndex[Private->SelectProxyType][0];
+ }
+ } else {
+ //
+ // The proxy offer should not be determined if select by received order.
+ //
+ Status = EFI_NO_RESPONSE;
+
+ for (Index = 0; Index < Private->OfferNum; Index++) {
+
+ OfferType = Private->OfferBuffer[Index].Dhcp6.OfferType;
+
+ if (!IS_PROXY_OFFER (OfferType)) {
+ //
+ // Skip non proxy dhcp offers.
+ //
+ continue;
+ }
+
+ if (OfferType == PxeOfferTypeProxyBinl) {
+ //
+ // Try all the cached ProxyBinl offer one by one to request bootfilename.
+ //
+ if (EFI_ERROR (PxeBcRetryDhcp6Binl (Private, Index))) {
+ continue;
+ }
+ }
+
+ Private->SelectProxyType = OfferType;
+ ProxyIndex = Index;
+ Status = EFI_SUCCESS;
+ break;
+ }
+ }
+
+ if (!EFI_ERROR (Status) && Private->SelectProxyType != PxeOfferTypeProxyBinl) {
+ //
+ // Success to try to request by a ProxyPxe10 or ProxyWfm11a offer, copy and parse it.
+ //
+ Status = PxeBcCopyDhcp6Proxy (Private, ProxyIndex);
+ }
+ } else {
+ //
+ // Othewise, the bootfilename must be included in DhcpOnly offer.
+ //
+ ASSERT (Cache6->OptList[PXEBC_DHCP6_IDX_BOOT_FILE_URL] != NULL);
+ }
+ }
+
+ if (!EFI_ERROR (Status)) {
+ //
+ // All PXE boot information is ready by now.
+ //
+ Status = PxeBcCopyDhcp6Ack (Private, &Private->DhcpAck.Dhcp6.Packet.Ack, TRUE);
+ Private->PxeBc.Mode->DhcpDiscoverValid = TRUE;
+ }
+
+ return Status;
+}
+
+
+/**
+ Unregister the address by Ip6Config protocol.
+
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.
+
+**/
+VOID
+PxeBcUnregisterIp6Address (
+ IN PXEBC_PRIVATE_DATA *Private
+ )
+{
+ if (Private->Ip6Policy != PXEBC_IP6_POLICY_MAX) {
+ //
+ // PXE driver change the policy of IP6 driver, it's a chance to recover.
+ // Keep the point and there is no enough requirements to do recovery.
+ //
+ }
+}
+
+/**
+ Check whether IP driver could route the message which will be sent to ServerIp address.
+
+ This function will check the IP6 route table every 1 seconds until specified timeout is expired, if a valid
+ route is found in IP6 route table, the address will be filed in GatewayAddr and return.
+
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.
+ @param[in] TimeOutInSecond Timeout value in seconds.
+ @param[out] GatewayAddr Pointer to store the gateway IP address.
+
+ @retval EFI_SUCCESS Found a valid gateway address successfully.
+ @retval EFI_TIMEOUT The operation is time out.
+ @retval Other Unexpect error happened.
+
+**/
+EFI_STATUS
+PxeBcCheckRouteTable (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN UINTN TimeOutInSecond,
+ OUT EFI_IPv6_ADDRESS *GatewayAddr
+ )
+{
+ EFI_STATUS Status;
+ EFI_IP6_PROTOCOL *Ip6;
+ EFI_IP6_MODE_DATA Ip6ModeData;
+ UINTN Index;
+ EFI_EVENT TimeOutEvt;
+ UINTN RetryCount;
+ BOOLEAN GatewayIsFound;
+
+ ASSERT (GatewayAddr != NULL);
+ ASSERT (Private != NULL);
+
+ Ip6 = Private->Ip6;
+ GatewayIsFound = FALSE;
+ RetryCount = 0;
+ TimeOutEvt = NULL;
+ ZeroMem (GatewayAddr, sizeof (EFI_IPv6_ADDRESS));
+
+ while (TRUE) {
+ Status = Ip6->GetModeData (Ip6, &Ip6ModeData, NULL, NULL);
+ if (EFI_ERROR (Status)) {
+ goto ON_EXIT;
+ }
+
+ //
+ // Find out the gateway address which can route the message which send to ServerIp.
+ //
+ for (Index = 0; Index < Ip6ModeData.RouteCount; Index++) {
+ if (NetIp6IsNetEqual (&Private->ServerIp.v6, &Ip6ModeData.RouteTable[Index].Destination, Ip6ModeData.RouteTable[Index].PrefixLength)) {
+ IP6_COPY_ADDRESS (GatewayAddr, &Ip6ModeData.RouteTable[Index].Gateway);
+ GatewayIsFound = TRUE;
+ break;
+ }
+ }
+
+ if (Ip6ModeData.AddressList != NULL) {
+ FreePool (Ip6ModeData.AddressList);
+ }
+ if (Ip6ModeData.GroupTable != NULL) {
+ FreePool (Ip6ModeData.GroupTable);
+ }
+ if (Ip6ModeData.RouteTable != NULL) {
+ FreePool (Ip6ModeData.RouteTable);
+ }
+ if (Ip6ModeData.NeighborCache != NULL) {
+ FreePool (Ip6ModeData.NeighborCache);
+ }
+ if (Ip6ModeData.PrefixTable != NULL) {
+ FreePool (Ip6ModeData.PrefixTable);
+ }
+ if (Ip6ModeData.IcmpTypeList != NULL) {
+ FreePool (Ip6ModeData.IcmpTypeList);
+ }
+
+ if (GatewayIsFound || RetryCount == TimeOutInSecond) {
+ break;
+ }
+
+ RetryCount++;
+
+ //
+ // Delay 1 second then recheck it again.
+ //
+ if (TimeOutEvt == NULL) {
+ Status = gBS->CreateEvent (
+ EVT_TIMER,
+ TPL_CALLBACK,
+ NULL,
+ NULL,
+ &TimeOutEvt
+ );
+ if (EFI_ERROR (Status)) {
+ goto ON_EXIT;
+ }
+ }
+
+ Status = gBS->SetTimer (TimeOutEvt, TimerRelative, TICKS_PER_SECOND);
+ if (EFI_ERROR (Status)) {
+ goto ON_EXIT;
+ }
+ while (EFI_ERROR (gBS->CheckEvent (TimeOutEvt))) {
+ Ip6->Poll (Ip6);
+ }
+ }
+
+ON_EXIT:
+ if (TimeOutEvt != NULL) {
+ gBS->CloseEvent (TimeOutEvt);
+ }
+
+ if (GatewayIsFound) {
+ Status = EFI_SUCCESS;
+ } else if (RetryCount == TimeOutInSecond) {
+ Status = EFI_TIMEOUT;
+ }
+
+ return Status;
+}
+
+/**
+ Register the ready station address and gateway by Ip6Config protocol.
+
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.
+ @param[in] Address The pointer to the ready address.
+
+ @retval EFI_SUCCESS Registered the address succesfully.
+ @retval Others Failed to register the address.
+
+**/
+EFI_STATUS
+PxeBcRegisterIp6Address (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN EFI_IPv6_ADDRESS *Address
+ )
+{
+ EFI_IP6_PROTOCOL *Ip6;
+ EFI_IP6_CONFIG_PROTOCOL *Ip6Cfg;
+ EFI_IP6_CONFIG_POLICY Policy;
+ EFI_IP6_CONFIG_MANUAL_ADDRESS CfgAddr;
+ EFI_IPv6_ADDRESS GatewayAddr;
+ UINTN DataSize;
+ EFI_EVENT MappedEvt;
+ EFI_STATUS Status;
+ BOOLEAN NoGateway;
+ EFI_IPv6_ADDRESS *Ip6Addr;
+ UINTN Index;
+
+ Status = EFI_SUCCESS;
+ MappedEvt = NULL;
+ Ip6Addr = NULL;
+ DataSize = sizeof (EFI_IP6_CONFIG_POLICY);
+ Ip6Cfg = Private->Ip6Cfg;
+ Ip6 = Private->Ip6;
+ NoGateway = FALSE;
+
+ ZeroMem (&CfgAddr, sizeof (EFI_IP6_CONFIG_MANUAL_ADDRESS));
+ CopyMem (&CfgAddr.Address, Address, sizeof (EFI_IPv6_ADDRESS));
+
+ Status = Ip6->Configure (Ip6, &Private->Ip6CfgData);
+ if (EFI_ERROR (Status)) {
+ goto ON_EXIT;
+ }
+
+ //
+ // Retrieve the gateway address from IP6 route table.
+ //
+ Status = PxeBcCheckRouteTable (Private, PXEBC_IP6_ROUTE_TABLE_TIMEOUT, &GatewayAddr);
+ if (EFI_ERROR (Status)) {
+ NoGateway = TRUE;
+ }
+
+ //
+ // There is no channel between IP6 and PXE driver about address setting,
+ // so it has to set the new address by Ip6ConfigProtocol manually.
+ //
+ Policy = Ip6ConfigPolicyManual;
+ Status = Ip6Cfg->SetData (
+ Ip6Cfg,
+ Ip6ConfigDataTypePolicy,
+ sizeof(EFI_IP6_CONFIG_POLICY),
+ &Policy
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // There is no need to recover later.
+ //
+ Private->Ip6Policy = PXEBC_IP6_POLICY_MAX;
+ goto ON_EXIT;
+ }
+
+ //
+ // Create a notify event to set address flag when DAD if IP6 driver succeeded.
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ PxeBcCommonNotify,
+ &Private->IsAddressOk,
+ &MappedEvt
+ );
+ if (EFI_ERROR (Status)) {
+ goto ON_EXIT;
+ }
+
+ Private->IsAddressOk = FALSE;
+ Status = Ip6Cfg->RegisterDataNotify (
+ Ip6Cfg,
+ Ip6ConfigDataTypeManualAddress,
+ MappedEvt
+ );
+ if (EFI_ERROR(Status)) {
+ goto ON_EXIT;
+ }
+
+ Status = Ip6Cfg->SetData (
+ Ip6Cfg,
+ Ip6ConfigDataTypeManualAddress,
+ sizeof(EFI_IP6_CONFIG_MANUAL_ADDRESS),
+ &CfgAddr
+ );
+ if (EFI_ERROR(Status) && Status != EFI_NOT_READY) {
+ goto ON_EXIT;
+ } else if (Status == EFI_NOT_READY) {
+ //
+ // Poll the network until the asynchronous process is finished.
+ //
+ while (!Private->IsAddressOk) {
+ Ip6->Poll (Ip6);
+ }
+ //
+ // Check whether the IP6 address setting is successed.
+ //
+ DataSize = 0;
+ Status = Ip6Cfg->GetData (
+ Ip6Cfg,
+ Ip6ConfigDataTypeManualAddress,
+ &DataSize,
+ NULL
+ );
+ if (Status != EFI_BUFFER_TOO_SMALL || DataSize == 0) {
+ Status = EFI_DEVICE_ERROR;
+ goto ON_EXIT;
+ }
+
+ Ip6Addr = AllocatePool (DataSize);
+ if (Ip6Addr == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ Status = Ip6Cfg->GetData (
+ Ip6Cfg,
+ Ip6ConfigDataTypeManualAddress,
+ &DataSize,
+ (VOID*) Ip6Addr
+ );
+ if (EFI_ERROR (Status)) {
+ Status = EFI_DEVICE_ERROR;
+ goto ON_EXIT;
+ }
+
+ for (Index = 0; Index < DataSize / sizeof (EFI_IPv6_ADDRESS); Index++) {
+ if (CompareMem (Ip6Addr + Index, Address, sizeof (EFI_IPv6_ADDRESS)) == 0) {
+ break;
+ }
+ }
+ if (Index == DataSize / sizeof (EFI_IPv6_ADDRESS)) {
+ Status = EFI_ABORTED;
+ goto ON_EXIT;
+ }
+ }
+
+ //
+ // Set the default gateway address back if needed.
+ //
+ if (!NoGateway && !NetIp6IsUnspecifiedAddr (&GatewayAddr)) {
+ Status = Ip6Cfg->SetData (
+ Ip6Cfg,
+ Ip6ConfigDataTypeGateway,
+ sizeof (EFI_IPv6_ADDRESS),
+ &GatewayAddr
+ );
+ if (EFI_ERROR (Status)) {
+ goto ON_EXIT;
+ }
+ }
+
+ON_EXIT:
+ if (MappedEvt != NULL) {
+ Ip6Cfg->UnregisterDataNotify (
+ Ip6Cfg,
+ Ip6ConfigDataTypeManualAddress,
+ MappedEvt
+ );
+ gBS->CloseEvent (MappedEvt);
+ }
+ if (Ip6Addr != NULL) {
+ FreePool (Ip6Addr);
+ }
+ return Status;
+}
+
+/**
+ Set the IP6 policy to Automatic.
+
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.
+
+ @retval EFI_SUCCESS Switch the IP policy succesfully.
+ @retval Others Unexpect error happened.
+
+**/
+EFI_STATUS
+PxeBcSetIp6Policy (
+ IN PXEBC_PRIVATE_DATA *Private
+ )
+{
+ EFI_IP6_CONFIG_POLICY Policy;
+ EFI_STATUS Status;
+ EFI_IP6_CONFIG_PROTOCOL *Ip6Cfg;
+ UINTN DataSize;
+
+ Ip6Cfg = Private->Ip6Cfg;
+ DataSize = sizeof (EFI_IP6_CONFIG_POLICY);
+
+ //
+ // Get and store the current policy of IP6 driver.
+ //
+ Status = Ip6Cfg->GetData (
+ Ip6Cfg,
+ Ip6ConfigDataTypePolicy,
+ &DataSize,
+ &Private->Ip6Policy
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (Private->Ip6Policy == Ip6ConfigPolicyManual) {
+ Policy = Ip6ConfigPolicyAutomatic;
+ Status = Ip6Cfg->SetData (
+ Ip6Cfg,
+ Ip6ConfigDataTypePolicy,
+ sizeof(EFI_IP6_CONFIG_POLICY),
+ &Policy
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // There is no need to recover later.
+ //
+ Private->Ip6Policy = PXEBC_IP6_POLICY_MAX;
+ }
+ }
+
+ return Status;
+}
+
+/**
+ This function will register the station IP address and flush IP instance to start using the new IP address.
+
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.
+
+ @retval EFI_SUCCESS The new IP address has been configured successfully.
+ @retval Others Failed to configure the address.
+
+**/
+EFI_STATUS
+PxeBcSetIp6Address (
+ IN PXEBC_PRIVATE_DATA *Private
+ )
+{
+ EFI_STATUS Status;
+ EFI_DHCP6_PROTOCOL *Dhcp6;
+
+ Dhcp6 = Private->Dhcp6;
+
+ CopyMem (&Private->StationIp.v6, &Private->TmpStationIp.v6, sizeof (EFI_IPv6_ADDRESS));
+ CopyMem (&Private->PxeBc.Mode->StationIp.v6, &Private->StationIp.v6, sizeof (EFI_IPv6_ADDRESS));
+
+ Status = PxeBcRegisterIp6Address (Private, &Private->StationIp.v6);
+ if (EFI_ERROR (Status)) {
+ Dhcp6->Stop (Dhcp6);
+ return Status;
+ }
+
+ Status = PxeBcFlushStationIp (Private, &Private->StationIp, NULL);
+ if (EFI_ERROR (Status)) {
+ PxeBcUnregisterIp6Address (Private);
+ Dhcp6->Stop (Dhcp6);
+ return Status;
+ }
+
+ AsciiPrint ("\n Station IP address is ");
+ PxeBcShowIp6Addr (&Private->StationIp.v6);
+
+ return EFI_SUCCESS;
+}
+
+/**
+ EFI_DHCP6_CALLBACK is provided by the consumer of the EFI DHCPv6 Protocol driver
+ to intercept events that occurred in the configuration process.
+
+ @param[in] This The pointer to the EFI DHCPv6 Protocol.
+ @param[in] Context The pointer to the context set by EFI_DHCP6_PROTOCOL.Configure().
+ @param[in] CurrentState The current operational state of the EFI DHCPv Protocol driver.
+ @param[in] Dhcp6Event The event that occurs in the current state, which usually means a
+ state transition.
+ @param[in] Packet The DHCPv6 packet that is going to be sent or was already received.
+ @param[out] NewPacket The packet that is used to replace the Packet above.
+
+ @retval EFI_SUCCESS Told the EFI DHCPv6 Protocol driver to continue the DHCP process.
+ @retval EFI_NOT_READY Only used in the Dhcp6Selecting state. The EFI DHCPv6 Protocol
+ driver will continue to wait for more packets.
+ @retval EFI_ABORTED Told the EFI DHCPv6 Protocol driver to abort the current process.
+
+**/
+EFI_STATUS
+EFIAPI
+PxeBcDhcp6CallBack (
+ IN EFI_DHCP6_PROTOCOL *This,
+ IN VOID *Context,
+ IN EFI_DHCP6_STATE CurrentState,
+ IN EFI_DHCP6_EVENT Dhcp6Event,
+ IN EFI_DHCP6_PACKET *Packet,
+ OUT EFI_DHCP6_PACKET **NewPacket OPTIONAL
+ )
+{
+ PXEBC_PRIVATE_DATA *Private;
+ EFI_PXE_BASE_CODE_MODE *Mode;
+ EFI_PXE_BASE_CODE_CALLBACK_PROTOCOL *Callback;
+ EFI_DHCP6_PACKET *SelectAd;
+ EFI_STATUS Status;
+ BOOLEAN Received;
+
+ if ((Dhcp6Event != Dhcp6RcvdAdvertise) &&
+ (Dhcp6Event != Dhcp6SelectAdvertise) &&
+ (Dhcp6Event != Dhcp6SendSolicit) &&
+ (Dhcp6Event != Dhcp6SendRequest) &&
+ (Dhcp6Event != Dhcp6RcvdReply)) {
+ return EFI_SUCCESS;
+ }
+
+ ASSERT (Packet != NULL);
+
+ Private = (PXEBC_PRIVATE_DATA *) Context;
+ Mode = Private->PxeBc.Mode;
+ Callback = Private->PxeBcCallback;
+
+ //
+ // Callback to user when any traffic ocurred if has.
+ //
+ if (Dhcp6Event != Dhcp6SelectAdvertise && Callback != NULL) {
+ Received = (BOOLEAN) (Dhcp6Event == Dhcp6RcvdAdvertise || Dhcp6Event == Dhcp6RcvdReply);
+ Status = Callback->Callback (
+ Callback,
+ Private->Function,
+ Received,
+ Packet->Length,
+ (EFI_PXE_BASE_CODE_PACKET *) &Packet->Dhcp6
+ );
+ if (Status != EFI_PXE_BASE_CODE_CALLBACK_STATUS_CONTINUE) {
+ return EFI_ABORTED;
+ }
+ }
+
+ Status = EFI_SUCCESS;
+
+ switch (Dhcp6Event) {
+
+ case Dhcp6SendSolicit:
+ if (Packet->Length > PXEBC_DHCP6_PACKET_MAX_SIZE) {
+ //
+ // If the to be sent packet exceeds the maximum length, abort the DHCP process.
+ //
+ Status = EFI_ABORTED;
+ break;
+ }
+
+ //
+ // Record the first Solicate msg time
+ //
+ if (Private->SolicitTimes == 0) {
+ CalcElapsedTime (Private);
+ Private->SolicitTimes++;
+ }
+ //
+ // Cache the dhcp discover packet to mode data directly.
+ //
+ CopyMem (&Mode->DhcpDiscover.Dhcpv4, &Packet->Dhcp6, Packet->Length);
+ break;
+
+ case Dhcp6RcvdAdvertise:
+ Status = EFI_NOT_READY;
+ if (Packet->Length > PXEBC_DHCP6_PACKET_MAX_SIZE) {
+ //
+ // Ignore the incoming packets which exceed the maximum length.
+ //
+ break;
+ }
+ if (Private->OfferNum < PXEBC_OFFER_MAX_NUM) {
+ //
+ // Cache the dhcp offers to OfferBuffer[] for select later, and record
+ // the OfferIndex and OfferCount.
+ //
+ PxeBcCacheDhcp6Offer (Private, Packet);
+ }
+ break;
+
+ case Dhcp6SendRequest:
+ if (Packet->Length > PXEBC_DHCP6_PACKET_MAX_SIZE) {
+ //
+ // If the to be sent packet exceeds the maximum length, abort the DHCP process.
+ //
+ Status = EFI_ABORTED;
+ break;
+ }
+
+ //
+ // Store the request packet as seed packet for discover.
+ //
+ if (Private->Dhcp6Request != NULL) {
+ FreePool (Private->Dhcp6Request);
+ }
+ Private->Dhcp6Request = AllocateZeroPool (Packet->Size);
+ if (Private->Dhcp6Request != NULL) {
+ CopyMem (Private->Dhcp6Request, Packet, Packet->Size);
+ }
+ break;
+
+ case Dhcp6SelectAdvertise:
+ //
+ // Select offer by the default policy or by order, and record the SelectIndex
+ // and SelectProxyType.
+ //
+ PxeBcSelectDhcp6Offer (Private);
+
+ if (Private->SelectIndex == 0) {
+ Status = EFI_ABORTED;
+ } else {
+ ASSERT (NewPacket != NULL);
+ SelectAd = &Private->OfferBuffer[Private->SelectIndex - 1].Dhcp6.Packet.Offer;
+ *NewPacket = AllocateZeroPool (SelectAd->Size);
+ ASSERT (*NewPacket != NULL);
+ CopyMem (*NewPacket, SelectAd, SelectAd->Size);
+ }
+ break;
+
+ case Dhcp6RcvdReply:
+ //
+ // Cache the dhcp ack to Private->Dhcp6Ack, but it's not the final ack in mode data
+ // without verification.
+ //
+ ASSERT (Private->SelectIndex != 0);
+ Status = PxeBcCopyDhcp6Ack (Private, Packet, FALSE);
+ if (EFI_ERROR (Status)) {
+ Status = EFI_ABORTED;
+ }
+ break;
+
+ default:
+ ASSERT (0);
+ }
+
+ return Status;
+}
+
+
+/**
+ Build and send out the request packet for the bootfile, and parse the reply.
+
+ @param[in] Private The pointer to PxeBc private data.
+ @param[in] Type PxeBc option boot item type.
+ @param[in] Layer The pointer to option boot item layer.
+ @param[in] UseBis Use BIS or not.
+ @param[in] DestIp The pointer to the server address.
+
+ @retval EFI_SUCCESS Successfully discovered the boot file.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resources.
+ @retval EFI_NOT_FOUND Can't get the PXE reply packet.
+ @retval Others Failed to discover the boot file.
+
+**/
+EFI_STATUS
+PxeBcDhcp6Discover (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN UINT16 Type,
+ IN UINT16 *Layer,
+ IN BOOLEAN UseBis,
+ IN EFI_IP_ADDRESS *DestIp
+ )
+{
+ EFI_PXE_BASE_CODE_UDP_PORT SrcPort;
+ EFI_PXE_BASE_CODE_UDP_PORT DestPort;
+ EFI_PXE_BASE_CODE_MODE *Mode;
+ EFI_PXE_BASE_CODE_PROTOCOL *PxeBc;
+ EFI_PXE_BASE_CODE_DHCPV6_PACKET *Discover;
+ UINTN DiscoverLen;
+ EFI_DHCP6_PACKET *Request;
+ UINTN RequestLen;
+ EFI_DHCP6_PACKET *Reply;
+ UINT8 *RequestOpt;
+ UINT8 *DiscoverOpt;
+ UINTN ReadSize;
+ UINT16 OpCode;
+ UINT16 OpLen;
+ UINT32 Xid;
+ EFI_STATUS Status;
+
+ PxeBc = &Private->PxeBc;
+ Mode = PxeBc->Mode;
+ Request = Private->Dhcp6Request;
+ SrcPort = PXEBC_BS_DISCOVER_PORT;
+ DestPort = PXEBC_BS_DISCOVER_PORT;
+
+ if (!UseBis && Layer != NULL) {
+ *Layer &= EFI_PXE_BASE_CODE_BOOT_LAYER_MASK;
+ }
+
+ if (Request == NULL) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ Discover = AllocateZeroPool (sizeof (EFI_PXE_BASE_CODE_DHCPV6_PACKET));
+ if (Discover == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ //
+ // Build the discover packet by the cached request packet before.
+ //
+ Xid = NET_RANDOM (NetRandomInitSeed ());
+ Discover->TransactionId = HTONL (Xid);
+ Discover->MessageType = Request->Dhcp6.Header.MessageType;
+ RequestOpt = Request->Dhcp6.Option;
+ DiscoverOpt = Discover->DhcpOptions;
+ DiscoverLen = sizeof (EFI_DHCP6_HEADER);
+ RequestLen = DiscoverLen;
+
+ while (RequestLen < Request->Length) {
+ OpCode = NTOHS (((EFI_DHCP6_PACKET_OPTION *) RequestOpt)->OpCode);
+ OpLen = NTOHS (((EFI_DHCP6_PACKET_OPTION *) RequestOpt)->OpLen);
+ if (OpCode != EFI_DHCP6_IA_TYPE_NA &&
+ OpCode != EFI_DHCP6_IA_TYPE_TA) {
+ //
+ // Copy all the options except IA option.
+ //
+ CopyMem (DiscoverOpt, RequestOpt, OpLen + 4);
+ DiscoverOpt += (OpLen + 4);
+ DiscoverLen += (OpLen + 4);
+ }
+ RequestOpt += (OpLen + 4);
+ RequestLen += (OpLen + 4);
+ }
+
+ Status = PxeBc->UdpWrite (
+ PxeBc,
+ 0,
+ &Private->ServerIp,
+ &DestPort,
+ NULL,
+ &Private->StationIp,
+ &SrcPort,
+ NULL,
+ NULL,
+ &DiscoverLen,
+ (VOID *) Discover
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Cache the right PXE reply packet here, set valid flag later.
+ // Especially for PXE discover packet, store it into mode data here.
+ //
+ if (Private->IsDoDiscover) {
+ CopyMem (&Mode->PxeDiscover.Dhcpv6, Discover, DiscoverLen);
+ Reply = &Private->PxeReply.Dhcp6.Packet.Ack;
+ } else {
+ Reply = &Private->ProxyOffer.Dhcp6.Packet.Offer;
+ }
+ ReadSize = (UINTN) Reply->Size;
+
+ //
+ // Start Udp6Read instance
+ //
+ Status = Private->Udp6Read->Configure (Private->Udp6Read, &Private->Udp6CfgData);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = PxeBc->UdpRead (
+ PxeBc,
+ EFI_PXE_BASE_CODE_UDP_OPFLAGS_ANY_DEST_IP,
+ NULL,
+ &SrcPort,
+ &Private->ServerIp,
+ &DestPort,
+ NULL,
+ NULL,
+ &ReadSize,
+ (VOID *) &Reply->Dhcp6
+ );
+ //
+ // Stop Udp6Read instance
+ //
+ Private->Udp6Read->Configure (Private->Udp6Read, NULL);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Start the DHCPv6 S.A.R.R. process to acquire the IPv6 address and other PXE boot information.
+
+ @param[in] Private The pointer to PxeBc private data.
+ @param[in] Dhcp6 The pointer to the EFI_DHCP6_PROTOCOL
+
+ @retval EFI_SUCCESS The S.A.R.R. process successfully finished.
+ @retval Others Failed to finish the S.A.R.R. process.
+
+**/
+EFI_STATUS
+PxeBcDhcp6Sarr (
+ IN PXEBC_PRIVATE_DATA *Private,
+ IN EFI_DHCP6_PROTOCOL *Dhcp6
+ )
+{
+ EFI_PXE_BASE_CODE_MODE *PxeMode;
+ EFI_DHCP6_CONFIG_DATA Config;
+ EFI_DHCP6_MODE_DATA Mode;
+ EFI_DHCP6_RETRANSMISSION *Retransmit;
+ EFI_DHCP6_PACKET_OPTION *OptList[PXEBC_DHCP6_OPTION_MAX_NUM];
+ UINT8 Buffer[PXEBC_DHCP6_OPTION_MAX_SIZE];
+ UINT32 OptCount;
+ EFI_STATUS Status;
+ EFI_IP6_CONFIG_PROTOCOL *Ip6Cfg;
+ EFI_STATUS TimerStatus;
+ EFI_EVENT Timer;
+ UINT64 GetMappingTimeOut;
+ UINTN DataSize;
+ EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS DadXmits;
+
+ Status = EFI_SUCCESS;
+ PxeMode = Private->PxeBc.Mode;
+ Ip6Cfg = Private->Ip6Cfg;
+ Timer = NULL;
+
+ //
+ // Build option list for the request packet.
+ //
+ OptCount = PxeBcBuildDhcp6Options (Private, OptList, Buffer);
+ ASSERT (OptCount> 0);
+
+ Retransmit = AllocateZeroPool (sizeof (EFI_DHCP6_RETRANSMISSION));
+ if (Retransmit == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ ZeroMem (&Mode, sizeof (EFI_DHCP6_MODE_DATA));
+ ZeroMem (&Config, sizeof (EFI_DHCP6_CONFIG_DATA));
+
+ Config.OptionCount = OptCount;
+ Config.OptionList = OptList;
+ Config.Dhcp6Callback = PxeBcDhcp6CallBack;
+ Config.CallbackContext = Private;
+ Config.IaInfoEvent = NULL;
+ Config.RapidCommit = FALSE;
+ Config.ReconfigureAccept = FALSE;
+ Config.IaDescriptor.IaId = Private->IaId;
+ Config.IaDescriptor.Type = EFI_DHCP6_IA_TYPE_NA;
+ Config.SolicitRetransmission = Retransmit;
+ Retransmit->Irt = 4;
+ Retransmit->Mrc = 4;
+ Retransmit->Mrt = 32;
+ Retransmit->Mrd = 60;
+
+ //
+ // Configure the DHCPv6 instance for PXE boot.
+ //
+ Status = Dhcp6->Configure (Dhcp6, &Config);
+ FreePool (Retransmit);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Initialize the record fields for DHCPv6 offer in private data.
+ //
+ Private->IsProxyRecved = FALSE;
+ Private->OfferNum = 0;
+ Private->SelectIndex = 0;
+ ZeroMem (Private->OfferCount, sizeof (Private->OfferCount));
+ ZeroMem (Private->OfferIndex, sizeof (Private->OfferIndex));
+
+
+ //
+ // Start DHCPv6 S.A.R.R. process to acquire IPv6 address.
+ //
+ Status = Dhcp6->Start (Dhcp6);
+ if (Status == EFI_NO_MAPPING) {
+ //
+ // IP6 Linklocal address is not available for use, so stop current Dhcp process
+ // and wait for duplicate address detection to finish.
+ //
+ Dhcp6->Stop (Dhcp6);
+
+ //
+ // Get Duplicate Address Detection Transmits count.
+ //
+ DataSize = sizeof (EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS);
+ Status = Ip6Cfg->GetData (
+ Ip6Cfg,
+ Ip6ConfigDataTypeDupAddrDetectTransmits,
+ &DataSize,
+ &DadXmits
+ );
+ if (EFI_ERROR (Status)) {
+ Dhcp6->Configure (Dhcp6, NULL);
+ return Status;
+ }
+
+ Status = gBS->CreateEvent (EVT_TIMER, TPL_CALLBACK, NULL, NULL, &Timer);
+ if (EFI_ERROR (Status)) {
+ Dhcp6->Configure (Dhcp6, NULL);
+ return Status;
+ }
+
+ GetMappingTimeOut = TICKS_PER_SECOND * DadXmits.DupAddrDetectTransmits + PXEBC_DAD_ADDITIONAL_DELAY;
+ Status = gBS->SetTimer (Timer, TimerRelative, GetMappingTimeOut);
+ if (EFI_ERROR (Status)) {
+ gBS->CloseEvent (Timer);
+ Dhcp6->Configure (Dhcp6, NULL);
+ return Status;
+ }
+
+ do {
+
+ TimerStatus = gBS->CheckEvent (Timer);
+ if (!EFI_ERROR (TimerStatus)) {
+ Status = Dhcp6->Start (Dhcp6);
+ }
+ } while (TimerStatus == EFI_NOT_READY);
+
+ gBS->CloseEvent (Timer);
+ }
+ if (EFI_ERROR (Status)) {
+ if (Status == EFI_ICMP_ERROR) {
+ PxeMode->IcmpErrorReceived = TRUE;
+ }
+ Dhcp6->Configure (Dhcp6, NULL);
+ return Status;
+ }
+
+ //
+ // Get the acquired IPv6 address and store them.
+ //
+ Status = Dhcp6->GetModeData (Dhcp6, &Mode, NULL);
+ if (EFI_ERROR (Status)) {
+ Dhcp6->Stop (Dhcp6);
+ return Status;
+ }
+
+ ASSERT ((Mode.Ia != NULL) && (Mode.Ia->State == Dhcp6Bound));
+ //
+ // DHCP6 doesn't have an option to specify the router address on the subnet, the only way to get the
+ // router address in IP6 is the router discovery mechanism (the RS and RA, which only be handled when
+ // the IP policy is Automatic). So we just hold the station IP address here and leave the IP policy as
+ // Automatic, until we get the server IP address. This could let IP6 driver finish the router discovery
+ // to find a valid router address.
+ //
+ CopyMem (&Private->TmpStationIp.v6, &Mode.Ia->IaAddress[0].IpAddress, sizeof (EFI_IPv6_ADDRESS));
+ if (Mode.ClientId != NULL) {
+ FreePool (Mode.ClientId);
+ }
+ if (Mode.Ia != NULL) {
+ FreePool (Mode.Ia);
+ }
+ //
+ // Check the selected offer whether BINL retry is needed.
+ //
+ Status = PxeBcHandleDhcp6Offer (Private);
+ if (EFI_ERROR (Status)) {
+ Dhcp6->Stop (Dhcp6);
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
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