| /** @file | |
| Functions implementation related with DHCPv4 for UefiPxeBc Driver. | |
| Copyright (c) 2009 - 2018, 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" | |
| // | |
| // This is a map from the interested DHCP4 option tags' index to the tag value. | |
| // | |
| UINT8 mInterestedDhcp4Tags[PXEBC_DHCP4_TAG_INDEX_MAX] = { | |
| DHCP4_TAG_BOOTFILE_LEN, | |
| DHCP4_TAG_VENDOR, | |
| DHCP4_TAG_OVERLOAD, | |
| DHCP4_TAG_MSG_TYPE, | |
| DHCP4_TAG_SERVER_ID, | |
| DHCP4_TAG_VENDOR_CLASS_ID, | |
| DHCP4_TAG_BOOTFILE | |
| }; | |
| // | |
| // There are 4 times retries with the value of 4, 8, 16 and 32, refers to PXE2.1 spec. | |
| // | |
| UINT32 mPxeDhcpTimeout[4] = {4, 8, 16, 32}; | |
| /** | |
| Parse a certain dhcp4 option by OptTag in Buffer, and return with start pointer. | |
| @param[in] Buffer Pointer to the option buffer. | |
| @param[in] Length Length of the option buffer. | |
| @param[in] OptTag Tag of the required option. | |
| @retval NULL Failed to find the required option. | |
| @retval Others The position of the required option. | |
| **/ | |
| EFI_DHCP4_PACKET_OPTION * | |
| PxeBcParseDhcp4Options ( | |
| IN UINT8 *Buffer, | |
| IN UINT32 Length, | |
| IN UINT8 OptTag | |
| ) | |
| { | |
| EFI_DHCP4_PACKET_OPTION *Option; | |
| UINT32 Offset; | |
| Option = (EFI_DHCP4_PACKET_OPTION *) Buffer; | |
| Offset = 0; | |
| while (Offset < Length && Option->OpCode != DHCP4_TAG_EOP) { | |
| if (Option->OpCode == OptTag) { | |
| // | |
| // Found the required option. | |
| // | |
| return Option; | |
| } | |
| // | |
| // Skip the current option to the next. | |
| // | |
| if (Option->OpCode == DHCP4_TAG_PAD) { | |
| Offset++; | |
| } else { | |
| Offset += Option->Length + 2; | |
| } | |
| Option = (EFI_DHCP4_PACKET_OPTION *) (Buffer + Offset); | |
| } | |
| return NULL; | |
| } | |
| /** | |
| Parse the PXE vender options and extract the information from them. | |
| @param[in] Dhcp4Option Pointer to vendor options in buffer. | |
| @param[in] VendorOption Pointer to structure to store information in vendor options. | |
| **/ | |
| VOID | |
| PxeBcParseVendorOptions ( | |
| IN EFI_DHCP4_PACKET_OPTION *Dhcp4Option, | |
| IN PXEBC_VENDOR_OPTION *VendorOption | |
| ) | |
| { | |
| UINT32 *BitMap; | |
| UINT8 VendorOptionLen; | |
| EFI_DHCP4_PACKET_OPTION *PxeOption; | |
| UINT8 Offset; | |
| BitMap = VendorOption->BitMap; | |
| VendorOptionLen = Dhcp4Option->Length; | |
| PxeOption = (EFI_DHCP4_PACKET_OPTION *) &Dhcp4Option->Data[0]; | |
| Offset = 0; | |
| ASSERT (PxeOption != NULL); | |
| while ((Offset < VendorOptionLen) && (PxeOption->OpCode != DHCP4_TAG_EOP)) { | |
| // | |
| // Parse all the interesting PXE vendor options one by one. | |
| // | |
| switch (PxeOption->OpCode) { | |
| case PXEBC_VENDOR_TAG_MTFTP_IP: | |
| CopyMem (&VendorOption->MtftpIp, PxeOption->Data, sizeof (EFI_IPv4_ADDRESS)); | |
| break; | |
| case PXEBC_VENDOR_TAG_MTFTP_CPORT: | |
| CopyMem (&VendorOption->MtftpCPort, PxeOption->Data, sizeof (VendorOption->MtftpCPort)); | |
| break; | |
| case PXEBC_VENDOR_TAG_MTFTP_SPORT: | |
| CopyMem (&VendorOption->MtftpSPort, PxeOption->Data, sizeof (VendorOption->MtftpSPort)); | |
| break; | |
| case PXEBC_VENDOR_TAG_MTFTP_TIMEOUT: | |
| VendorOption->MtftpTimeout = *PxeOption->Data; | |
| break; | |
| case PXEBC_VENDOR_TAG_MTFTP_DELAY: | |
| VendorOption->MtftpDelay = *PxeOption->Data; | |
| break; | |
| case PXEBC_VENDOR_TAG_DISCOVER_CTRL: | |
| VendorOption->DiscoverCtrl = *PxeOption->Data; | |
| break; | |
| case PXEBC_VENDOR_TAG_DISCOVER_MCAST: | |
| CopyMem (&VendorOption->DiscoverMcastIp, PxeOption->Data, sizeof (EFI_IPv4_ADDRESS)); | |
| break; | |
| case PXEBC_VENDOR_TAG_BOOT_SERVERS: | |
| VendorOption->BootSvrLen = PxeOption->Length; | |
| VendorOption->BootSvr = (PXEBC_BOOT_SVR_ENTRY *) PxeOption->Data; | |
| break; | |
| case PXEBC_VENDOR_TAG_BOOT_MENU: | |
| VendorOption->BootMenuLen = PxeOption->Length; | |
| VendorOption->BootMenu = (PXEBC_BOOT_MENU_ENTRY *) PxeOption->Data; | |
| break; | |
| case PXEBC_VENDOR_TAG_MENU_PROMPT: | |
| VendorOption->MenuPromptLen = PxeOption->Length; | |
| VendorOption->MenuPrompt = (PXEBC_MENU_PROMPT *) PxeOption->Data; | |
| break; | |
| case PXEBC_VENDOR_TAG_MCAST_ALLOC: | |
| CopyMem (&VendorOption->McastIpBase, PxeOption->Data, sizeof (EFI_IPv4_ADDRESS)); | |
| CopyMem (&VendorOption->McastIpBlock, PxeOption->Data + 4, sizeof (VendorOption->McastIpBlock)); | |
| CopyMem (&VendorOption->McastIpRange, PxeOption->Data + 6, sizeof (VendorOption->McastIpRange)); | |
| break; | |
| case PXEBC_VENDOR_TAG_CREDENTIAL_TYPES: | |
| VendorOption->CredTypeLen = PxeOption->Length; | |
| VendorOption->CredType = (UINT32 *) PxeOption->Data; | |
| break; | |
| case PXEBC_VENDOR_TAG_BOOT_ITEM: | |
| CopyMem (&VendorOption->BootSrvType, PxeOption->Data, sizeof (VendorOption->BootSrvType)); | |
| CopyMem (&VendorOption->BootSrvLayer, PxeOption->Data + 2, sizeof (VendorOption->BootSrvLayer)); | |
| break; | |
| default: | |
| // | |
| // Not interesting PXE vendor options. | |
| // | |
| break; | |
| } | |
| // | |
| // Set the bit map for the special PXE options. | |
| // | |
| SET_VENDOR_OPTION_BIT_MAP (BitMap, PxeOption->OpCode); | |
| // | |
| // Continue to the next option. | |
| // | |
| if (PxeOption->OpCode == DHCP4_TAG_PAD) { | |
| Offset++; | |
| } else { | |
| Offset = (UINT8) (Offset + PxeOption->Length + 2); | |
| } | |
| PxeOption = (EFI_DHCP4_PACKET_OPTION *) (Dhcp4Option->Data + Offset); | |
| } | |
| } | |
| /** | |
| Build the options buffer for the DHCPv4 request packet. | |
| @param[in] Private Pointer to PxeBc private data. | |
| @param[out] OptList Pointer to the option pointer array. | |
| @param[in] Buffer Pointer to the buffer to contain the option list. | |
| @param[in] NeedMsgType If TRUE, it is necessary to include the Msg type option. | |
| Otherwise, it is not necessary. | |
| @return Index The count of the built-in options. | |
| **/ | |
| UINT32 | |
| PxeBcBuildDhcp4Options ( | |
| IN PXEBC_PRIVATE_DATA *Private, | |
| OUT EFI_DHCP4_PACKET_OPTION **OptList, | |
| IN UINT8 *Buffer, | |
| IN BOOLEAN NeedMsgType | |
| ) | |
| { | |
| UINT32 Index; | |
| PXEBC_DHCP4_OPTION_ENTRY OptEnt; | |
| UINT16 Value; | |
| Index = 0; | |
| OptList[0] = (EFI_DHCP4_PACKET_OPTION *) Buffer; | |
| if (NeedMsgType) { | |
| // | |
| // Append message type. | |
| // | |
| OptList[Index]->OpCode = DHCP4_TAG_MSG_TYPE; | |
| OptList[Index]->Length = 1; | |
| OptEnt.Mesg = (PXEBC_DHCP4_OPTION_MESG *) OptList[Index]->Data; | |
| OptEnt.Mesg->Type = PXEBC_DHCP4_MSG_TYPE_REQUEST; | |
| Index++; | |
| OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]); | |
| // | |
| // Append max message size. | |
| // | |
| OptList[Index]->OpCode = DHCP4_TAG_MAXMSG; | |
| OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_MAX_MESG_SIZE); | |
| OptEnt.MaxMesgSize = (PXEBC_DHCP4_OPTION_MAX_MESG_SIZE *) OptList[Index]->Data; | |
| Value = NTOHS (PXEBC_DHCP4_PACKET_MAX_SIZE); | |
| CopyMem (&OptEnt.MaxMesgSize->Size, &Value, sizeof (UINT16)); | |
| Index++; | |
| OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]); | |
| } | |
| // | |
| // Append parameter request list option. | |
| // | |
| OptList[Index]->OpCode = DHCP4_TAG_PARA_LIST; | |
| OptList[Index]->Length = 35; | |
| OptEnt.Para = (PXEBC_DHCP4_OPTION_PARA *) OptList[Index]->Data; | |
| OptEnt.Para->ParaList[0] = DHCP4_TAG_NETMASK; | |
| OptEnt.Para->ParaList[1] = DHCP4_TAG_TIME_OFFSET; | |
| OptEnt.Para->ParaList[2] = DHCP4_TAG_ROUTER; | |
| OptEnt.Para->ParaList[3] = DHCP4_TAG_TIME_SERVER; | |
| OptEnt.Para->ParaList[4] = DHCP4_TAG_NAME_SERVER; | |
| OptEnt.Para->ParaList[5] = DHCP4_TAG_DNS_SERVER; | |
| OptEnt.Para->ParaList[6] = DHCP4_TAG_HOSTNAME; | |
| OptEnt.Para->ParaList[7] = DHCP4_TAG_BOOTFILE_LEN; | |
| OptEnt.Para->ParaList[8] = DHCP4_TAG_DOMAINNAME; | |
| OptEnt.Para->ParaList[9] = DHCP4_TAG_ROOTPATH; | |
| OptEnt.Para->ParaList[10] = DHCP4_TAG_EXTEND_PATH; | |
| OptEnt.Para->ParaList[11] = DHCP4_TAG_EMTU; | |
| OptEnt.Para->ParaList[12] = DHCP4_TAG_TTL; | |
| OptEnt.Para->ParaList[13] = DHCP4_TAG_BROADCAST; | |
| OptEnt.Para->ParaList[14] = DHCP4_TAG_NIS_DOMAIN; | |
| OptEnt.Para->ParaList[15] = DHCP4_TAG_NIS_SERVER; | |
| OptEnt.Para->ParaList[16] = DHCP4_TAG_NTP_SERVER; | |
| OptEnt.Para->ParaList[17] = DHCP4_TAG_VENDOR; | |
| OptEnt.Para->ParaList[18] = DHCP4_TAG_REQUEST_IP; | |
| OptEnt.Para->ParaList[19] = DHCP4_TAG_LEASE; | |
| OptEnt.Para->ParaList[20] = DHCP4_TAG_SERVER_ID; | |
| OptEnt.Para->ParaList[21] = DHCP4_TAG_T1; | |
| OptEnt.Para->ParaList[22] = DHCP4_TAG_T2; | |
| OptEnt.Para->ParaList[23] = DHCP4_TAG_VENDOR_CLASS_ID; | |
| OptEnt.Para->ParaList[24] = DHCP4_TAG_TFTP; | |
| OptEnt.Para->ParaList[25] = DHCP4_TAG_BOOTFILE; | |
| OptEnt.Para->ParaList[26] = DHCP4_TAG_UUID; | |
| OptEnt.Para->ParaList[27] = 0x80; | |
| OptEnt.Para->ParaList[28] = 0x81; | |
| OptEnt.Para->ParaList[29] = 0x82; | |
| OptEnt.Para->ParaList[30] = 0x83; | |
| OptEnt.Para->ParaList[31] = 0x84; | |
| OptEnt.Para->ParaList[32] = 0x85; | |
| OptEnt.Para->ParaList[33] = 0x86; | |
| OptEnt.Para->ParaList[34] = 0x87; | |
| Index++; | |
| OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]); | |
| // | |
| // Append UUID/Guid-based client identifier option | |
| // | |
| OptList[Index]->OpCode = DHCP4_TAG_UUID; | |
| OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_UUID); | |
| OptEnt.Uuid = (PXEBC_DHCP4_OPTION_UUID *) OptList[Index]->Data; | |
| OptEnt.Uuid->Type = 0; | |
| Index++; | |
| OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]); | |
| if (EFI_ERROR (NetLibGetSystemGuid ((EFI_GUID *) OptEnt.Uuid->Guid))) { | |
| // | |
| // Zero the Guid to indicate NOT programable if failed to get system Guid. | |
| // | |
| DEBUG ((EFI_D_WARN, "PXE: Failed to read system GUID from the smbios table!\n")); | |
| ZeroMem (OptEnt.Uuid->Guid, sizeof (EFI_GUID)); | |
| } | |
| // | |
| // Append client network device interface option | |
| // | |
| OptList[Index]->OpCode = DHCP4_TAG_UNDI; | |
| OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_UNDI); | |
| OptEnt.Undi = (PXEBC_DHCP4_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_DHCP_OPTION (OptList[Index - 1]); | |
| // | |
| // Append client system architecture option | |
| // | |
| OptList[Index]->OpCode = DHCP4_TAG_ARCH; | |
| OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_ARCH); | |
| OptEnt.Arch = (PXEBC_DHCP4_OPTION_ARCH *) OptList[Index]->Data; | |
| Value = HTONS (EFI_PXE_CLIENT_SYSTEM_ARCHITECTURE); | |
| CopyMem (&OptEnt.Arch->Type, &Value, sizeof (UINT16)); | |
| Index++; | |
| OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]); | |
| // | |
| // Append vendor class identify option | |
| // | |
| OptList[Index]->OpCode = DHCP4_TAG_VENDOR_CLASS_ID; | |
| OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_CLID); | |
| OptEnt.Clid = (PXEBC_DHCP4_OPTION_CLID *) OptList[Index]->Data; | |
| CopyMem ( | |
| OptEnt.Clid, | |
| DEFAULT_CLASS_ID_DATA, | |
| sizeof (PXEBC_DHCP4_OPTION_CLID) | |
| ); | |
| PxeBcUintnToAscDecWithFormat ( | |
| EFI_PXE_CLIENT_SYSTEM_ARCHITECTURE, | |
| OptEnt.Clid->ArchitectureType, | |
| sizeof (OptEnt.Clid->ArchitectureType) | |
| ); | |
| if (Private->Nii != NULL) { | |
| CopyMem (OptEnt.Clid->InterfaceName, Private->Nii->StringId, sizeof (OptEnt.Clid->InterfaceName)); | |
| PxeBcUintnToAscDecWithFormat (Private->Nii->MajorVer, OptEnt.Clid->UndiMajor, sizeof (OptEnt.Clid->UndiMajor)); | |
| PxeBcUintnToAscDecWithFormat (Private->Nii->MinorVer, OptEnt.Clid->UndiMinor, sizeof (OptEnt.Clid->UndiMinor)); | |
| } | |
| Index++; | |
| return Index; | |
| } | |
| /** | |
| Create a template DHCPv4 packet as a seed. | |
| @param[out] Seed Pointer to the seed packet. | |
| @param[in] Udp4 Pointer to EFI_UDP4_PROTOCOL. | |
| **/ | |
| VOID | |
| PxeBcSeedDhcp4Packet ( | |
| OUT EFI_DHCP4_PACKET *Seed, | |
| IN EFI_UDP4_PROTOCOL *Udp4 | |
| ) | |
| { | |
| EFI_SIMPLE_NETWORK_MODE Mode; | |
| EFI_DHCP4_HEADER *Header; | |
| // | |
| // Get IfType and HwAddressSize from SNP mode data. | |
| // | |
| Udp4->GetModeData (Udp4, NULL, NULL, NULL, &Mode); | |
| Seed->Size = sizeof (EFI_DHCP4_PACKET); | |
| Seed->Length = sizeof (Seed->Dhcp4); | |
| Header = &Seed->Dhcp4.Header; | |
| ZeroMem (Header, sizeof (EFI_DHCP4_HEADER)); | |
| Header->OpCode = PXEBC_DHCP4_OPCODE_REQUEST; | |
| Header->HwType = Mode.IfType; | |
| Header->HwAddrLen = (UINT8) Mode.HwAddressSize; | |
| CopyMem (Header->ClientHwAddr, &Mode.CurrentAddress, Header->HwAddrLen); | |
| Seed->Dhcp4.Magik = PXEBC_DHCP4_MAGIC; | |
| Seed->Dhcp4.Option[0] = DHCP4_TAG_EOP; | |
| } | |
| /** | |
| Cache the DHCPv4 packet. | |
| @param[in] Dst Pointer to the cache buffer for DHCPv4 packet. | |
| @param[in] Src Pointer to the DHCPv4 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 | |
| PxeBcCacheDhcp4Packet ( | |
| IN EFI_DHCP4_PACKET *Dst, | |
| IN EFI_DHCP4_PACKET *Src | |
| ) | |
| { | |
| if (Dst->Size < Src->Length) { | |
| return EFI_BUFFER_TOO_SMALL; | |
| } | |
| CopyMem (&Dst->Dhcp4, &Src->Dhcp4, Src->Length); | |
| Dst->Length = Src->Length; | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Parse the cached DHCPv4 packet, including all the options. | |
| @param[in] Cache4 Pointer to cached DHCPv4 packet. | |
| @retval EFI_SUCCESS Parsed the DHCPv4 packet successfully. | |
| @retval EFI_DEVICE_ERROR Failed to parse and invalid packet. | |
| **/ | |
| EFI_STATUS | |
| PxeBcParseDhcp4Packet ( | |
| IN PXEBC_DHCP4_PACKET_CACHE *Cache4 | |
| ) | |
| { | |
| EFI_DHCP4_PACKET *Offer; | |
| EFI_DHCP4_PACKET_OPTION **Options; | |
| EFI_DHCP4_PACKET_OPTION *Option; | |
| PXEBC_OFFER_TYPE OfferType; | |
| UINTN Index; | |
| BOOLEAN IsProxyOffer; | |
| BOOLEAN IsPxeOffer; | |
| UINT8 *Ptr8; | |
| BOOLEAN FileFieldOverloaded; | |
| IsProxyOffer = FALSE; | |
| IsPxeOffer = FALSE; | |
| FileFieldOverloaded = FALSE; | |
| ZeroMem (Cache4->OptList, sizeof (Cache4->OptList)); | |
| ZeroMem (&Cache4->VendorOpt, sizeof (Cache4->VendorOpt)); | |
| Offer = &Cache4->Packet.Offer; | |
| Options = Cache4->OptList; | |
| // | |
| // Parse DHCPv4 options in this offer, and store the pointers. | |
| // First, try to parse DHCPv4 options from the DHCP optional parameters field. | |
| // | |
| for (Index = 0; Index < PXEBC_DHCP4_TAG_INDEX_MAX; Index++) { | |
| Options[Index] = PxeBcParseDhcp4Options ( | |
| Offer->Dhcp4.Option, | |
| GET_OPTION_BUFFER_LEN (Offer), | |
| mInterestedDhcp4Tags[Index] | |
| ); | |
| } | |
| // | |
| // Second, Check if bootfilename and serverhostname is overloaded to carry DHCP options refers to rfc-2132. | |
| // If yes, try to parse options from the BootFileName field, then ServerName field. | |
| // | |
| Option = Options[PXEBC_DHCP4_TAG_INDEX_OVERLOAD]; | |
| if (Option != NULL) { | |
| if ((Option->Data[0] & PXEBC_DHCP4_OVERLOAD_FILE) != 0) { | |
| FileFieldOverloaded = TRUE; | |
| for (Index = 0; Index < PXEBC_DHCP4_TAG_INDEX_MAX; Index++) { | |
| if (Options[Index] == NULL) { | |
| Options[Index] = PxeBcParseDhcp4Options ( | |
| (UINT8 *) Offer->Dhcp4.Header.BootFileName, | |
| sizeof (Offer->Dhcp4.Header.BootFileName), | |
| mInterestedDhcp4Tags[Index] | |
| ); | |
| } | |
| } | |
| } | |
| if ((Option->Data[0] & PXEBC_DHCP4_OVERLOAD_SERVER_NAME) != 0) { | |
| for (Index = 0; Index < PXEBC_DHCP4_TAG_INDEX_MAX; Index++) { | |
| if (Options[Index] == NULL) { | |
| Options[Index] = PxeBcParseDhcp4Options ( | |
| (UINT8 *) Offer->Dhcp4.Header.ServerName, | |
| sizeof (Offer->Dhcp4.Header.ServerName), | |
| mInterestedDhcp4Tags[Index] | |
| ); | |
| } | |
| } | |
| } | |
| } | |
| // | |
| // The offer with zero "yiaddr" is a proxy offer. | |
| // | |
| if (Offer->Dhcp4.Header.YourAddr.Addr[0] == 0) { | |
| IsProxyOffer = TRUE; | |
| } | |
| // | |
| // The offer with "PXEClient" is a PXE offer. | |
| // | |
| Option = Options[PXEBC_DHCP4_TAG_INDEX_CLASS_ID]; | |
| if ((Option != NULL) && (Option->Length >= 9) && | |
| (CompareMem (Option->Data, DEFAULT_CLASS_ID_DATA, 9) == 0)) { | |
| IsPxeOffer = TRUE; | |
| } | |
| // | |
| // Parse PXE vendor options in this offer, and store the contents/pointers. | |
| // | |
| Option = Options[PXEBC_DHCP4_TAG_INDEX_VENDOR]; | |
| if (IsPxeOffer && Option != NULL) { | |
| PxeBcParseVendorOptions (Option, &Cache4->VendorOpt); | |
| } | |
| // | |
| // Parse PXE boot file name: | |
| // According to PXE spec, boot file name should be read from DHCP option 67 (bootfile name) if present. | |
| // Otherwise, read from boot file field in DHCP header. | |
| // | |
| if (Options[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] != NULL) { | |
| // | |
| // RFC 2132, Section 9.5 does not strictly state Bootfile name (option 67) is null | |
| // terminated string. So force to append null terminated character at the end of string. | |
| // | |
| Ptr8 = (UINT8*)&Options[PXEBC_DHCP4_TAG_INDEX_BOOTFILE]->Data[0]; | |
| Ptr8 += Options[PXEBC_DHCP4_TAG_INDEX_BOOTFILE]->Length; | |
| if (*(Ptr8 - 1) != '\0') { | |
| *Ptr8 = '\0'; | |
| } | |
| } else if (!FileFieldOverloaded && Offer->Dhcp4.Header.BootFileName[0] != 0) { | |
| // | |
| // If the bootfile is not present and bootfilename is present in DHCPv4 packet, just parse it. | |
| // Do not count dhcp option header here, or else will destroy the serverhostname. | |
| // | |
| Options[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] = (EFI_DHCP4_PACKET_OPTION *) | |
| (&Offer->Dhcp4.Header.BootFileName[0] - | |
| OFFSET_OF (EFI_DHCP4_PACKET_OPTION, Data[0])); | |
| } | |
| // | |
| // Determine offer type of the DHCPv4 packet. | |
| // | |
| Option = Options[PXEBC_DHCP4_TAG_INDEX_MSG_TYPE]; | |
| if (Option == NULL || Option->Data[0] == 0) { | |
| // | |
| // It's a Bootp offer. | |
| // | |
| OfferType = PxeOfferTypeBootp; | |
| Option = Cache4->OptList[PXEBC_DHCP4_TAG_INDEX_BOOTFILE]; | |
| if (Option == NULL) { | |
| // | |
| // If the Bootp offer without bootfilename, discard it. | |
| // | |
| return EFI_DEVICE_ERROR; | |
| } | |
| } else { | |
| if (IS_VALID_DISCOVER_VENDOR_OPTION (Cache4->VendorOpt.BitMap)) { | |
| // | |
| // It's a PXE10 offer with PXEClient and discover vendor option. | |
| // | |
| OfferType = IsProxyOffer ? PxeOfferTypeProxyPxe10 : PxeOfferTypeDhcpPxe10; | |
| } else if (IS_VALID_MTFTP_VENDOR_OPTION (Cache4->VendorOpt.BitMap)) { | |
| // | |
| // It's a WFM11a offer with PXEClient and mtftp vendor option. | |
| // But multi-cast download is not supported currently, so discard it. | |
| // | |
| return EFI_DEVICE_ERROR; | |
| } else if (IsPxeOffer) { | |
| // | |
| // It's a BINL offer only with PXEClient. | |
| // | |
| OfferType = IsProxyOffer ? PxeOfferTypeProxyBinl : PxeOfferTypeDhcpBinl; | |
| } else { | |
| // | |
| // It's a DHCPv4 only offer, which is a pure DHCPv4 offer packet. | |
| // | |
| OfferType = PxeOfferTypeDhcpOnly; | |
| } | |
| } | |
| Cache4->OfferType = OfferType; | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Cache the DHCPv4 ack packet, and parse it on demand. | |
| @param[in] Private Pointer to PxeBc private data. | |
| @param[in] Ack Pointer to the DHCPv4 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 | |
| PxeBcCopyDhcp4Ack ( | |
| IN PXEBC_PRIVATE_DATA *Private, | |
| IN EFI_DHCP4_PACKET *Ack, | |
| IN BOOLEAN Verified | |
| ) | |
| { | |
| EFI_PXE_BASE_CODE_MODE *Mode; | |
| EFI_STATUS Status; | |
| Mode = Private->PxeBc.Mode; | |
| Status = PxeBcCacheDhcp4Packet (&Private->DhcpAck.Dhcp4.Packet.Ack, Ack); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| if (Verified) { | |
| // | |
| // Parse the ack packet and store it into mode data if needed. | |
| // | |
| PxeBcParseDhcp4Packet (&Private->DhcpAck.Dhcp4); | |
| CopyMem (&Mode->DhcpAck.Dhcpv4, &Ack->Dhcp4, Ack->Length); | |
| Mode->DhcpAckReceived = TRUE; | |
| } | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Cache the DHCPv4 proxy offer packet according to the received order. | |
| @param[in] Private 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 | |
| PxeBcCopyProxyOffer ( | |
| IN PXEBC_PRIVATE_DATA *Private, | |
| IN UINT32 OfferIndex | |
| ) | |
| { | |
| EFI_PXE_BASE_CODE_MODE *Mode; | |
| EFI_DHCP4_PACKET *Offer; | |
| EFI_STATUS Status; | |
| ASSERT (OfferIndex < Private->OfferNum); | |
| ASSERT (OfferIndex < PXEBC_OFFER_MAX_NUM); | |
| Mode = Private->PxeBc.Mode; | |
| Offer = &Private->OfferBuffer[OfferIndex].Dhcp4.Packet.Offer; | |
| // | |
| // Cache the proxy offer packet and parse it. | |
| // | |
| Status = PxeBcCacheDhcp4Packet (&Private->ProxyOffer.Dhcp4.Packet.Offer, Offer); | |
| if (EFI_ERROR(Status)) { | |
| return Status; | |
| } | |
| PxeBcParseDhcp4Packet (&Private->ProxyOffer.Dhcp4); | |
| // | |
| // Store this packet into mode data. | |
| // | |
| CopyMem (&Mode->ProxyOffer.Dhcpv4, &Offer->Dhcp4, Offer->Length); | |
| Mode->ProxyOfferReceived = TRUE; | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Retry to request bootfile name by the BINL offer. | |
| @param[in] Private Pointer to PxeBc private data. | |
| @param[in] Index The received order of offer packets. | |
| @retval EFI_SUCCESS Successfully retried to request bootfile name. | |
| @retval EFI_DEVICE_ERROR Failed to retry bootfile name. | |
| **/ | |
| EFI_STATUS | |
| PxeBcRetryBinlOffer ( | |
| IN PXEBC_PRIVATE_DATA *Private, | |
| IN UINT32 Index | |
| ) | |
| { | |
| EFI_DHCP4_PACKET *Offer; | |
| EFI_IP_ADDRESS ServerIp; | |
| EFI_STATUS Status; | |
| PXEBC_DHCP4_PACKET_CACHE *Cache4; | |
| EFI_DHCP4_PACKET *Reply; | |
| ASSERT (Index < PXEBC_OFFER_MAX_NUM); | |
| ASSERT (Private->OfferBuffer[Index].Dhcp4.OfferType == PxeOfferTypeDhcpBinl || | |
| Private->OfferBuffer[Index].Dhcp4.OfferType == PxeOfferTypeProxyBinl); | |
| Offer = &Private->OfferBuffer[Index].Dhcp4.Packet.Offer; | |
| // | |
| // Prefer to siaddr in header as next server address. If it's zero, then use option 54. | |
| // | |
| if (Offer->Dhcp4.Header.ServerAddr.Addr[0] == 0) { | |
| CopyMem ( | |
| &ServerIp.Addr[0], | |
| Private->OfferBuffer[Index].Dhcp4.OptList[PXEBC_DHCP4_TAG_INDEX_SERVER_ID]->Data, | |
| sizeof (EFI_IPv4_ADDRESS) | |
| ); | |
| } else { | |
| CopyMem ( | |
| &ServerIp.Addr[0], | |
| &Offer->Dhcp4.Header.ServerAddr, | |
| sizeof (EFI_IPv4_ADDRESS) | |
| ); | |
| } | |
| Private->IsDoDiscover = FALSE; | |
| Cache4 = &Private->ProxyOffer.Dhcp4; | |
| Reply = &Cache4->Packet.Offer; | |
| // | |
| // Send another request packet for bootfile name. | |
| // | |
| Status = PxeBcDhcp4Discover ( | |
| Private, | |
| 0, | |
| NULL, | |
| FALSE, | |
| &ServerIp, | |
| 0, | |
| NULL | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| // | |
| // Parse the reply for the last request packet. | |
| // | |
| Status = PxeBcParseDhcp4Packet (Cache4); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| if (Cache4->OfferType != PxeOfferTypeProxyPxe10 && | |
| Cache4->OfferType != PxeOfferTypeProxyWfm11a && | |
| Cache4->OptList[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] == NULL) { | |
| // | |
| // This BINL ack doesn't have discovery option set or multicast option set | |
| // or bootfile name specified. | |
| // | |
| return EFI_DEVICE_ERROR; | |
| } | |
| // | |
| // Store the reply into mode data. | |
| // | |
| Private->PxeBc.Mode->ProxyOfferReceived = TRUE; | |
| CopyMem (&Private->PxeBc.Mode->ProxyOffer.Dhcpv4, &Reply->Dhcp4, Reply->Length); | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Cache all the received DHCPv4 offers, and set OfferIndex and OfferCount. | |
| @param[in] Private Pointer to PxeBc private data. | |
| @param[in] RcvdOffer Pointer to the received offer packet. | |
| @retval EFI_SUCCESS Cache and parse the packet successfully. | |
| @retval Others Operation failed. | |
| **/ | |
| EFI_STATUS | |
| PxeBcCacheDhcp4Offer ( | |
| IN PXEBC_PRIVATE_DATA *Private, | |
| IN EFI_DHCP4_PACKET *RcvdOffer | |
| ) | |
| { | |
| PXEBC_DHCP4_PACKET_CACHE *Cache4; | |
| EFI_DHCP4_PACKET *Offer; | |
| PXEBC_OFFER_TYPE OfferType; | |
| EFI_STATUS Status; | |
| ASSERT (Private->OfferNum < PXEBC_OFFER_MAX_NUM); | |
| Cache4 = &Private->OfferBuffer[Private->OfferNum].Dhcp4; | |
| Offer = &Cache4->Packet.Offer; | |
| // | |
| // Cache the content of DHCPv4 packet firstly. | |
| // | |
| Status = PxeBcCacheDhcp4Packet (Offer, RcvdOffer); | |
| if (EFI_ERROR(Status)) { | |
| return Status; | |
| } | |
| // | |
| // Validate the DHCPv4 packet, and parse the options and offer type. | |
| // | |
| if (EFI_ERROR (PxeBcParseDhcp4Packet (Cache4))) { | |
| return EFI_ABORTED; | |
| } | |
| // | |
| // Determine whether cache the current offer by type, and record OfferIndex and OfferCount. | |
| // | |
| OfferType = Cache4->OfferType; | |
| ASSERT (OfferType < PxeOfferTypeMax); | |
| if (OfferType == PxeOfferTypeBootp) { | |
| // | |
| // It's a Bootp offer, only cache the first one, and discard the others. | |
| // | |
| if (Private->OfferCount[OfferType] == 0) { | |
| Private->OfferIndex[OfferType][0] = Private->OfferNum; | |
| Private->OfferCount[OfferType] = 1; | |
| } else { | |
| return EFI_ABORTED; | |
| } | |
| } else { | |
| ASSERT (Private->OfferCount[OfferType] < PXEBC_OFFER_MAX_NUM); | |
| if (IS_PROXY_DHCP_OFFER (Offer)) { | |
| // | |
| // 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 ((OfferType == PxeOfferTypeProxyPxe10 || OfferType == PxeOfferTypeProxyWfm11a) && | |
| Private->OfferCount[OfferType] < 1) { | |
| // | |
| // 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 DHCPv4 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 DHCPv4 offer, and record SelectIndex and SelectProxyType. | |
| @param[in] Private Pointer to PxeBc private data. | |
| **/ | |
| VOID | |
| PxeBcSelectDhcp4Offer ( | |
| IN PXEBC_PRIVATE_DATA *Private | |
| ) | |
| { | |
| UINT32 Index; | |
| UINT32 OfferIndex; | |
| EFI_DHCP4_PACKET *Offer; | |
| 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].Dhcp4.OptList[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] != NULL) { | |
| Private->SelectIndex = OfferIndex + 1; | |
| break; | |
| } | |
| } | |
| // | |
| // 8. Bootp offer with bootfilename. | |
| // | |
| OfferIndex = Private->OfferIndex[PxeOfferTypeBootp][0]; | |
| if (Private->SelectIndex == 0 && | |
| Private->OfferCount[PxeOfferTypeBootp] > 0 && | |
| Private->OfferBuffer[OfferIndex].Dhcp4.OptList[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] != NULL) { | |
| Private->SelectIndex = OfferIndex + 1; | |
| } | |
| } | |
| } else { | |
| // | |
| // Select offer by received order. | |
| // | |
| for (Index = 0; Index < Private->OfferNum; Index++) { | |
| Offer = &Private->OfferBuffer[Index].Dhcp4.Packet.Offer; | |
| if (IS_PROXY_DHCP_OFFER (Offer)) { | |
| // | |
| // Skip proxy offers | |
| // | |
| continue; | |
| } | |
| if (!Private->IsProxyRecved && | |
| Private->OfferBuffer[Index].Dhcp4.OfferType == PxeOfferTypeDhcpOnly && | |
| Private->OfferBuffer[Index].Dhcp4.OptList[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] == NULL) { | |
| // | |
| // Skip if DhcpOnly offer without any other proxy offers or bootfilename. | |
| // | |
| continue; | |
| } | |
| // | |
| // Record the index of the select offer. | |
| // | |
| Private->SelectIndex = Index + 1; | |
| break; | |
| } | |
| } | |
| } | |
| /** | |
| Handle the DHCPv4 offer packet. | |
| @param[in] Private Pointer to PxeBc private data. | |
| @retval EFI_SUCCESS Handled the DHCPv4 offer packet successfully. | |
| @retval EFI_NO_RESPONSE No response to the following request packet. | |
| @retval EFI_NOT_FOUND No boot filename received. | |
| @retval EFI_BUFFER_TOO_SMALL Can't cache the offer pacet. | |
| **/ | |
| EFI_STATUS | |
| PxeBcHandleDhcp4Offer ( | |
| IN PXEBC_PRIVATE_DATA *Private | |
| ) | |
| { | |
| PXEBC_DHCP4_PACKET_CACHE *Cache4; | |
| EFI_DHCP4_PACKET_OPTION **Options; | |
| UINT32 Index; | |
| EFI_DHCP4_PACKET *Offer; | |
| PXEBC_OFFER_TYPE OfferType; | |
| UINT32 ProxyIndex; | |
| UINT32 SelectIndex; | |
| EFI_STATUS Status; | |
| EFI_PXE_BASE_CODE_MODE *Mode; | |
| EFI_DHCP4_PACKET *Ack; | |
| ASSERT (Private->SelectIndex > 0); | |
| SelectIndex = (UINT32) (Private->SelectIndex - 1); | |
| ASSERT (SelectIndex < PXEBC_OFFER_MAX_NUM); | |
| Cache4 = &Private->OfferBuffer[SelectIndex].Dhcp4; | |
| Options = Cache4->OptList; | |
| Status = EFI_SUCCESS; | |
| if (Cache4->OfferType == PxeOfferTypeDhcpBinl) { | |
| // | |
| // DhcpBinl offer is selected, so need try to request bootfilename by this offer. | |
| // | |
| if (EFI_ERROR (PxeBcRetryBinlOffer (Private, SelectIndex))) { | |
| Status = EFI_NO_RESPONSE; | |
| } | |
| } else if (Cache4->OfferType == PxeOfferTypeDhcpOnly) { | |
| if (Private->IsProxyRecved) { | |
| // | |
| // DhcpOnly offer is selected, so need try to request bootfile name. | |
| // | |
| 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->SelectProxyType < PxeOfferTypeMax); | |
| ASSERT (Private->OfferCount[Private->SelectProxyType] > 0); | |
| if (Private->SelectProxyType == PxeOfferTypeProxyBinl) { | |
| // | |
| // Try all the cached ProxyBinl offer one by one to request bootfile name. | |
| // | |
| for (Index = 0; Index < Private->OfferCount[Private->SelectProxyType]; Index++) { | |
| ASSERT (Index < PXEBC_OFFER_MAX_NUM); | |
| ProxyIndex = Private->OfferIndex[Private->SelectProxyType][Index]; | |
| if (!EFI_ERROR (PxeBcRetryBinlOffer (Private, ProxyIndex))) { | |
| break; | |
| } | |
| } | |
| if (Index == Private->OfferCount[Private->SelectProxyType]) { | |
| Status = EFI_NO_RESPONSE; | |
| } | |
| } else { | |
| // | |
| // For other proxy offers, 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++) { | |
| ASSERT (Index < PXEBC_OFFER_MAX_NUM); | |
| Offer = &Private->OfferBuffer[Index].Dhcp4.Packet.Offer; | |
| OfferType = Private->OfferBuffer[Index].Dhcp4.OfferType; | |
| if (!IS_PROXY_DHCP_OFFER (Offer)) { | |
| // | |
| // Skip non proxy DHCPv4 offers. | |
| // | |
| continue; | |
| } | |
| if (OfferType == PxeOfferTypeProxyBinl) { | |
| // | |
| // Try all the cached ProxyBinl offer one by one to request bootfile name. | |
| // | |
| if (EFI_ERROR (PxeBcRetryBinlOffer (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 = PxeBcCopyProxyOffer (Private, ProxyIndex); | |
| } | |
| } else { | |
| // | |
| // Othewise, the bootfile name must be included in DhcpOnly offer. | |
| // | |
| if (Options[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] == NULL) { | |
| Status = EFI_NOT_FOUND; | |
| } | |
| } | |
| } | |
| if (!EFI_ERROR (Status)) { | |
| // | |
| // All PXE boot information is ready by now. | |
| // | |
| Mode = Private->PxeBc.Mode; | |
| Offer = &Cache4->Packet.Offer; | |
| Ack = &Private->DhcpAck.Dhcp4.Packet.Ack; | |
| if (Cache4->OfferType == PxeOfferTypeBootp) { | |
| // | |
| // Bootp is a special case that only 2 packets involved instead of 4. So the bootp's reply | |
| // should be taken as ack. | |
| // | |
| Ack = Offer; | |
| } | |
| Status = PxeBcCopyDhcp4Ack (Private, Ack, TRUE); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| Mode->DhcpDiscoverValid = TRUE; | |
| } | |
| return Status; | |
| } | |
| /** | |
| EFI_DHCP4_CALLBACK is provided by the consumer of the EFI DHCPv4 Protocol driver | |
| to intercept events that occurred in the configuration process. | |
| @param[in] This Pointer to the EFI DHCPv4 Protocol. | |
| @param[in] Context Pointer to the context set by EFI_DHCP4_PROTOCOL.Configure(). | |
| @param[in] CurrentState The current operational state of the EFI DHCPv4 Protocol driver. | |
| @param[in] Dhcp4Event The event that occurs in the current state, which usually means a | |
| state transition. | |
| @param[in] Packet The DHCPv4 packet that is going to be sent or already received. | |
| @param[out] NewPacket The packet that is used to replace the above Packet. | |
| @retval EFI_SUCCESS Tells the EFI DHCPv4 Protocol driver to continue the DHCP process. | |
| @retval EFI_NOT_READY Only used in the Dhcp4Selecting state. The EFI DHCPv4 Protocol | |
| driver will continue to wait for more DHCPOFFER packets until the | |
| retry timeout expires. | |
| @retval EFI_ABORTED Tells the EFI DHCPv4 Protocol driver to abort the current process | |
| and return to the Dhcp4Init or Dhcp4InitReboot state. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| PxeBcDhcp4CallBack ( | |
| IN EFI_DHCP4_PROTOCOL *This, | |
| IN VOID *Context, | |
| IN EFI_DHCP4_STATE CurrentState, | |
| IN EFI_DHCP4_EVENT Dhcp4Event, | |
| IN EFI_DHCP4_PACKET *Packet OPTIONAL, | |
| OUT EFI_DHCP4_PACKET **NewPacket OPTIONAL | |
| ) | |
| { | |
| PXEBC_PRIVATE_DATA *Private; | |
| EFI_PXE_BASE_CODE_MODE *Mode; | |
| EFI_PXE_BASE_CODE_CALLBACK_PROTOCOL *Callback; | |
| EFI_DHCP4_PACKET_OPTION *MaxMsgSize; | |
| UINT16 Value; | |
| EFI_STATUS Status; | |
| BOOLEAN Received; | |
| if ((Dhcp4Event != Dhcp4RcvdOffer) && | |
| (Dhcp4Event != Dhcp4SelectOffer) && | |
| (Dhcp4Event != Dhcp4SendDiscover) && | |
| (Dhcp4Event != Dhcp4RcvdAck)) { | |
| return EFI_SUCCESS; | |
| } | |
| ASSERT (Packet != NULL); | |
| Private = (PXEBC_PRIVATE_DATA *) Context; | |
| Mode = Private->PxeBc.Mode; | |
| Callback = Private->PxeBcCallback; | |
| // | |
| // Override the Maximum DHCP Message Size. | |
| // | |
| MaxMsgSize = PxeBcParseDhcp4Options ( | |
| Packet->Dhcp4.Option, | |
| GET_OPTION_BUFFER_LEN (Packet), | |
| DHCP4_TAG_MAXMSG | |
| ); | |
| if (MaxMsgSize != NULL) { | |
| Value = HTONS (PXEBC_DHCP4_PACKET_MAX_SIZE); | |
| CopyMem (MaxMsgSize->Data, &Value, sizeof (Value)); | |
| } | |
| // | |
| // Callback to user if any packets sent or received. | |
| // | |
| if (Dhcp4Event != Dhcp4SelectOffer && Callback != NULL) { | |
| Received = (BOOLEAN) (Dhcp4Event == Dhcp4RcvdOffer || Dhcp4Event == Dhcp4RcvdAck); | |
| Status = Callback->Callback ( | |
| Callback, | |
| Private->Function, | |
| Received, | |
| Packet->Length, | |
| (EFI_PXE_BASE_CODE_PACKET *) &Packet->Dhcp4 | |
| ); | |
| if (Status != EFI_PXE_BASE_CODE_CALLBACK_STATUS_CONTINUE) { | |
| return EFI_ABORTED; | |
| } | |
| } | |
| Status = EFI_SUCCESS; | |
| switch (Dhcp4Event) { | |
| case Dhcp4SendDiscover: | |
| if (Packet->Length > PXEBC_DHCP4_PACKET_MAX_SIZE) { | |
| // | |
| // If the to be sent packet exceeds the maximum length, abort the DHCP process. | |
| // | |
| Status = EFI_ABORTED; | |
| break; | |
| } | |
| // | |
| // Cache the DHCPv4 discover packet to mode data directly. | |
| // It need to check SendGuid as well as Dhcp4SendRequest. | |
| // | |
| CopyMem (&Mode->DhcpDiscover.Dhcpv4, &Packet->Dhcp4, Packet->Length); | |
| case Dhcp4SendRequest: | |
| if (Packet->Length > PXEBC_DHCP4_PACKET_MAX_SIZE) { | |
| // | |
| // If the to be sent packet exceeds the maximum length, abort the DHCP process. | |
| // | |
| Status = EFI_ABORTED; | |
| break; | |
| } | |
| if (Mode->SendGUID) { | |
| // | |
| // Send the system Guid instead of the MAC address as the hardware address if required. | |
| // | |
| if (EFI_ERROR (NetLibGetSystemGuid ((EFI_GUID *) Packet->Dhcp4.Header.ClientHwAddr))) { | |
| // | |
| // Zero the Guid to indicate NOT programable if failed to get system Guid. | |
| // | |
| DEBUG ((EFI_D_WARN, "PXE: Failed to read system GUID from the smbios table!\n")); | |
| ZeroMem (Packet->Dhcp4.Header.ClientHwAddr, sizeof (EFI_GUID)); | |
| } | |
| Packet->Dhcp4.Header.HwAddrLen = (UINT8) sizeof (EFI_GUID); | |
| } | |
| break; | |
| case Dhcp4RcvdOffer: | |
| Status = EFI_NOT_READY; | |
| if (Packet->Length > PXEBC_DHCP4_PACKET_MAX_SIZE) { | |
| // | |
| // Ignore the incoming packets which exceed the maximum length. | |
| // | |
| break; | |
| } | |
| if (Private->OfferNum < PXEBC_OFFER_MAX_NUM) { | |
| // | |
| // Cache the DHCPv4 offers to OfferBuffer[] for select later, and record | |
| // the OfferIndex and OfferCount. | |
| // If error happens, just ignore this packet and continue to wait more offer. | |
| // | |
| PxeBcCacheDhcp4Offer (Private, Packet); | |
| } | |
| break; | |
| case Dhcp4SelectOffer: | |
| ASSERT (NewPacket != NULL); | |
| // | |
| // Select offer by the default policy or by order, and record the SelectIndex | |
| // and SelectProxyType. | |
| // | |
| PxeBcSelectDhcp4Offer (Private); | |
| if (Private->SelectIndex == 0) { | |
| Status = EFI_ABORTED; | |
| } else { | |
| *NewPacket = &Private->OfferBuffer[Private->SelectIndex - 1].Dhcp4.Packet.Offer; | |
| } | |
| break; | |
| case Dhcp4RcvdAck: | |
| // | |
| // Cache the DHCPv4 ack to Private->Dhcp4Ack, but it's not the final ack in mode data | |
| // without verification. | |
| // | |
| ASSERT (Private->SelectIndex != 0); | |
| Status = PxeBcCopyDhcp4Ack (Private, Packet, FALSE); | |
| if (EFI_ERROR (Status)) { | |
| Status = EFI_ABORTED; | |
| } | |
| break; | |
| default: | |
| break; | |
| } | |
| return Status; | |
| } | |
| /** | |
| Build and send out the request packet for the bootfile, and parse the reply. | |
| @param[in] Private Pointer to PxeBc private data. | |
| @param[in] Type PxeBc option boot item type. | |
| @param[in] Layer Pointer to option boot item layer. | |
| @param[in] UseBis Use BIS or not. | |
| @param[in] DestIp Pointer to the server address. | |
| @param[in] IpCount The total count of the server address. | |
| @param[in] SrvList Pointer to EFI_PXE_BASE_CODE_SRVLIST. | |
| @retval EFI_SUCCESS Successfully discovered boot file. | |
| @retval EFI_OUT_OF_RESOURCES Failed to allocate resource. | |
| @retval EFI_NOT_FOUND Can't get the PXE reply packet. | |
| @retval Others Failed to discover boot file. | |
| **/ | |
| EFI_STATUS | |
| PxeBcDhcp4Discover ( | |
| IN PXEBC_PRIVATE_DATA *Private, | |
| IN UINT16 Type, | |
| IN UINT16 *Layer, | |
| IN BOOLEAN UseBis, | |
| IN EFI_IP_ADDRESS *DestIp, | |
| IN UINT16 IpCount, | |
| IN EFI_PXE_BASE_CODE_SRVLIST *SrvList | |
| ) | |
| { | |
| EFI_PXE_BASE_CODE_UDP_PORT Sport; | |
| EFI_PXE_BASE_CODE_MODE *Mode; | |
| EFI_DHCP4_PROTOCOL *Dhcp4; | |
| EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN Token; | |
| BOOLEAN IsBCast; | |
| EFI_STATUS Status; | |
| UINT16 RepIndex; | |
| UINT16 SrvIndex; | |
| UINT16 TryIndex; | |
| EFI_DHCP4_LISTEN_POINT ListenPoint; | |
| EFI_DHCP4_PACKET *Response; | |
| UINT8 Buffer[PXEBC_DHCP4_OPTION_MAX_SIZE]; | |
| EFI_DHCP4_PACKET_OPTION *OptList[PXEBC_DHCP4_OPTION_MAX_NUM]; | |
| UINT32 OptCount; | |
| EFI_DHCP4_PACKET_OPTION *PxeOpt; | |
| PXEBC_OPTION_BOOT_ITEM *PxeBootItem; | |
| UINT8 VendorOptLen; | |
| UINT32 Xid; | |
| Mode = Private->PxeBc.Mode; | |
| Dhcp4 = Private->Dhcp4; | |
| Status = EFI_SUCCESS; | |
| ZeroMem (&Token, sizeof (EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN)); | |
| // | |
| // Use broadcast if destination address not specified. | |
| // | |
| if (DestIp == NULL) { | |
| Sport = PXEBC_DHCP4_S_PORT; | |
| IsBCast = TRUE; | |
| } else { | |
| Sport = PXEBC_BS_DISCOVER_PORT; | |
| IsBCast = FALSE; | |
| } | |
| if (!UseBis && Layer != NULL) { | |
| *Layer &= EFI_PXE_BASE_CODE_BOOT_LAYER_MASK; | |
| } | |
| // | |
| // Build all the options for the request packet. | |
| // | |
| OptCount = PxeBcBuildDhcp4Options (Private, OptList, Buffer, TRUE); | |
| if (Private->IsDoDiscover) { | |
| // | |
| // Add vendor option of PXE_BOOT_ITEM | |
| // | |
| VendorOptLen = (UINT8) ((sizeof (EFI_DHCP4_PACKET_OPTION) - 1) * 2 + sizeof (PXEBC_OPTION_BOOT_ITEM) + 1); | |
| OptList[OptCount] = AllocateZeroPool (VendorOptLen); | |
| if (OptList[OptCount] == NULL) { | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| OptList[OptCount]->OpCode = DHCP4_TAG_VENDOR; | |
| OptList[OptCount]->Length = (UINT8) (VendorOptLen - 2); | |
| PxeOpt = (EFI_DHCP4_PACKET_OPTION *) OptList[OptCount]->Data; | |
| PxeOpt->OpCode = PXEBC_VENDOR_TAG_BOOT_ITEM; | |
| PxeOpt->Length = (UINT8) sizeof (PXEBC_OPTION_BOOT_ITEM); | |
| PxeBootItem = (PXEBC_OPTION_BOOT_ITEM *) PxeOpt->Data; | |
| PxeBootItem->Type = HTONS (Type); | |
| PxeOpt->Data[PxeOpt->Length] = DHCP4_TAG_EOP; | |
| if (Layer != NULL) { | |
| PxeBootItem->Layer = HTONS (*Layer); | |
| } | |
| OptCount++; | |
| } | |
| // | |
| // Build the request packet with seed packet and option list. | |
| // | |
| Status = Dhcp4->Build ( | |
| Dhcp4, | |
| &Private->SeedPacket, | |
| 0, | |
| NULL, | |
| OptCount, | |
| OptList, | |
| &Token.Packet | |
| ); | |
| // | |
| // Free the vendor option of PXE_BOOT_ITEM. | |
| // | |
| if (Private->IsDoDiscover) { | |
| FreePool (OptList[OptCount - 1]); | |
| } | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| if (Mode->SendGUID) { | |
| if (EFI_ERROR (NetLibGetSystemGuid ((EFI_GUID *) Token.Packet->Dhcp4.Header.ClientHwAddr))) { | |
| // | |
| // Zero the Guid to indicate NOT programable if failed to get system Guid. | |
| // | |
| DEBUG ((EFI_D_WARN, "PXE: Failed to read system GUID from the smbios table!\n")); | |
| ZeroMem (Token.Packet->Dhcp4.Header.ClientHwAddr, sizeof (EFI_GUID)); | |
| } | |
| Token.Packet->Dhcp4.Header.HwAddrLen = (UINT8) sizeof (EFI_GUID); | |
| } | |
| // | |
| // Set fields of the token for the request packet. | |
| // | |
| Xid = NET_RANDOM (NetRandomInitSeed ()); | |
| Token.Packet->Dhcp4.Header.Xid = HTONL (Xid); | |
| Token.Packet->Dhcp4.Header.Reserved = HTONS ((UINT16) ((IsBCast) ? 0x8000 : 0x0)); | |
| CopyMem (&Token.Packet->Dhcp4.Header.ClientAddr, &Private->StationIp, sizeof (EFI_IPv4_ADDRESS)); | |
| Token.RemotePort = Sport; | |
| if (IsBCast) { | |
| SetMem (&Token.RemoteAddress, sizeof (EFI_IPv4_ADDRESS), 0xff); | |
| } else { | |
| CopyMem (&Token.RemoteAddress, DestIp, sizeof (EFI_IPv4_ADDRESS)); | |
| } | |
| CopyMem (&Token.GatewayAddress, &Private->GatewayIp, sizeof (EFI_IPv4_ADDRESS)); | |
| if (!IsBCast) { | |
| Token.ListenPointCount = 1; | |
| Token.ListenPoints = &ListenPoint; | |
| Token.ListenPoints[0].ListenPort = PXEBC_BS_DISCOVER_PORT; | |
| CopyMem (&Token.ListenPoints[0].ListenAddress, &Private->StationIp, sizeof(EFI_IPv4_ADDRESS)); | |
| CopyMem (&Token.ListenPoints[0].SubnetMask, &Private->SubnetMask, sizeof(EFI_IPv4_ADDRESS)); | |
| } | |
| // | |
| // Send out the request packet to discover the bootfile. | |
| // | |
| for (TryIndex = 1; TryIndex <= PXEBC_BOOT_REQUEST_RETRIES; TryIndex++) { | |
| Token.TimeoutValue = (UINT16) (PXEBC_BOOT_REQUEST_TIMEOUT * TryIndex); | |
| Token.Packet->Dhcp4.Header.Seconds = (UINT16) (PXEBC_BOOT_REQUEST_TIMEOUT * (TryIndex - 1)); | |
| Status = Dhcp4->TransmitReceive (Dhcp4, &Token); | |
| if (Token.Status != EFI_TIMEOUT) { | |
| break; | |
| } | |
| } | |
| if (TryIndex > PXEBC_BOOT_REQUEST_RETRIES) { | |
| // | |
| // No server response our PXE request | |
| // | |
| Status = EFI_TIMEOUT; | |
| } | |
| if (!EFI_ERROR (Status)) { | |
| RepIndex = 0; | |
| SrvIndex = 0; | |
| Response = Token.ResponseList; | |
| // | |
| // Find the right PXE Reply according to server address. | |
| // | |
| while (RepIndex < Token.ResponseCount) { | |
| if (Response->Length > PXEBC_DHCP4_PACKET_MAX_SIZE) { | |
| SrvIndex = 0; | |
| RepIndex++; | |
| Response = (EFI_DHCP4_PACKET *) ((UINT8 *) Response + Response->Size); | |
| continue; | |
| } | |
| while (SrvIndex < IpCount) { | |
| if (SrvList[SrvIndex].AcceptAnyResponse) { | |
| break; | |
| } | |
| if ((SrvList[SrvIndex].Type == Type) && | |
| EFI_IP4_EQUAL (&Response->Dhcp4.Header.ServerAddr, &SrvList[SrvIndex].IpAddr)) { | |
| break; | |
| } | |
| SrvIndex++; | |
| } | |
| if ((IpCount != SrvIndex) || (IpCount == 0)) { | |
| break; | |
| } | |
| SrvIndex = 0; | |
| RepIndex++; | |
| Response = (EFI_DHCP4_PACKET *) ((UINT8 *) Response + Response->Size); | |
| } | |
| if (RepIndex < Token.ResponseCount) { | |
| // | |
| // 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) { | |
| Status = PxeBcCacheDhcp4Packet (&Private->PxeReply.Dhcp4.Packet.Ack, Response); | |
| if (EFI_ERROR(Status)) { | |
| goto ON_EXIT; | |
| } | |
| CopyMem (&Mode->PxeDiscover, &Token.Packet->Dhcp4, Token.Packet->Length); | |
| } else { | |
| Status = PxeBcCacheDhcp4Packet (&Private->ProxyOffer.Dhcp4.Packet.Offer, Response); | |
| if (EFI_ERROR(Status)) { | |
| goto ON_EXIT; | |
| } | |
| } | |
| } else { | |
| // | |
| // Not found the right PXE reply packet. | |
| // | |
| Status = EFI_NOT_FOUND; | |
| } | |
| } | |
| ON_EXIT: | |
| if (Token.ResponseList != NULL) { | |
| FreePool (Token.ResponseList); | |
| } | |
| if (Token.Packet != NULL) { | |
| FreePool (Token.Packet); | |
| } | |
| return Status; | |
| } | |
| /** | |
| Switch the Ip4 policy to static. | |
| @param[in] Private The pointer to PXEBC_PRIVATE_DATA. | |
| @retval EFI_SUCCESS The policy is already configured to static. | |
| @retval Others Other error as indicated.. | |
| **/ | |
| EFI_STATUS | |
| PxeBcSetIp4Policy ( | |
| IN PXEBC_PRIVATE_DATA *Private | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_IP4_CONFIG2_PROTOCOL *Ip4Config2; | |
| EFI_IP4_CONFIG2_POLICY Policy; | |
| UINTN DataSize; | |
| Ip4Config2 = Private->Ip4Config2; | |
| DataSize = sizeof (EFI_IP4_CONFIG2_POLICY); | |
| Status = Ip4Config2->GetData ( | |
| Ip4Config2, | |
| Ip4Config2DataTypePolicy, | |
| &DataSize, | |
| &Policy | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| if (Policy != Ip4Config2PolicyStatic) { | |
| Policy = Ip4Config2PolicyStatic; | |
| Status= Ip4Config2->SetData ( | |
| Ip4Config2, | |
| Ip4Config2DataTypePolicy, | |
| sizeof (EFI_IP4_CONFIG2_POLICY), | |
| &Policy | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| } | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Start the D.O.R.A DHCPv4 process to acquire the IPv4 address and other PXE boot information. | |
| @param[in] Private Pointer to PxeBc private data. | |
| @param[in] Dhcp4 Pointer to the EFI_DHCP4_PROTOCOL | |
| @retval EFI_SUCCESS The D.O.R.A process successfully finished. | |
| @retval Others Failed to finish the D.O.R.A process. | |
| **/ | |
| EFI_STATUS | |
| PxeBcDhcp4Dora ( | |
| IN PXEBC_PRIVATE_DATA *Private, | |
| IN EFI_DHCP4_PROTOCOL *Dhcp4 | |
| ) | |
| { | |
| EFI_PXE_BASE_CODE_MODE *PxeMode; | |
| EFI_DHCP4_CONFIG_DATA Config; | |
| EFI_DHCP4_MODE_DATA Mode; | |
| EFI_DHCP4_PACKET_OPTION *OptList[PXEBC_DHCP4_OPTION_MAX_NUM]; | |
| UINT8 Buffer[PXEBC_DHCP4_OPTION_MAX_SIZE]; | |
| UINT32 OptCount; | |
| EFI_STATUS Status; | |
| ASSERT (Dhcp4 != NULL); | |
| Status = EFI_SUCCESS; | |
| PxeMode = Private->PxeBc.Mode; | |
| // | |
| // Build option list for the request packet. | |
| // | |
| OptCount = PxeBcBuildDhcp4Options (Private, OptList, Buffer, FALSE); | |
| ASSERT (OptCount> 0); | |
| ZeroMem (&Mode, sizeof (EFI_DHCP4_MODE_DATA)); | |
| ZeroMem (&Config, sizeof (EFI_DHCP4_CONFIG_DATA)); | |
| Config.OptionCount = OptCount; | |
| Config.OptionList = OptList; | |
| Config.Dhcp4Callback = PxeBcDhcp4CallBack; | |
| Config.CallbackContext = Private; | |
| Config.DiscoverTryCount = PXEBC_DHCP_RETRIES; | |
| Config.DiscoverTimeout = mPxeDhcpTimeout; | |
| // | |
| // Configure the DHCPv4 instance for PXE boot. | |
| // | |
| Status = Dhcp4->Configure (Dhcp4, &Config); | |
| if (EFI_ERROR (Status)) { | |
| goto ON_EXIT; | |
| } | |
| // | |
| // Initialize the record fields for DHCPv4 offer in private data. | |
| // | |
| Private->IsProxyRecved = FALSE; | |
| Private->OfferNum = 0; | |
| ZeroMem (Private->OfferCount, sizeof (Private->OfferCount)); | |
| ZeroMem (Private->OfferIndex, sizeof (Private->OfferIndex)); | |
| Status = Dhcp4->Start (Dhcp4, NULL); | |
| if (EFI_ERROR (Status)) { | |
| if (Status == EFI_ICMP_ERROR) { | |
| PxeMode->IcmpErrorReceived = TRUE; | |
| } | |
| if (Status == EFI_TIMEOUT && Private->OfferNum > 0) { | |
| Status = EFI_NO_RESPONSE; | |
| } | |
| goto ON_EXIT; | |
| } | |
| // | |
| // Get the acquired IPv4 address and store them. | |
| // | |
| Status = Dhcp4->GetModeData (Dhcp4, &Mode); | |
| if (EFI_ERROR (Status)) { | |
| goto ON_EXIT; | |
| } | |
| ASSERT (Mode.State == Dhcp4Bound); | |
| CopyMem (&Private->StationIp, &Mode.ClientAddress, sizeof (EFI_IPv4_ADDRESS)); | |
| CopyMem (&Private->SubnetMask, &Mode.SubnetMask, sizeof (EFI_IPv4_ADDRESS)); | |
| CopyMem (&Private->GatewayIp, &Mode.RouterAddress, sizeof (EFI_IPv4_ADDRESS)); | |
| CopyMem (&PxeMode->StationIp, &Private->StationIp, sizeof (EFI_IPv4_ADDRESS)); | |
| CopyMem (&PxeMode->SubnetMask, &Private->SubnetMask, sizeof (EFI_IPv4_ADDRESS)); | |
| Status = PxeBcFlushStationIp (Private, &Private->StationIp, &Private->SubnetMask); | |
| if (EFI_ERROR (Status)) { | |
| goto ON_EXIT; | |
| } | |
| // | |
| // Check the selected offer whether BINL retry is needed. | |
| // | |
| Status = PxeBcHandleDhcp4Offer (Private); | |
| AsciiPrint ("\n Station IP address is "); | |
| PxeBcShowIp4Addr (&Private->StationIp.v4); | |
| AsciiPrint ("\n"); | |
| ON_EXIT: | |
| if (EFI_ERROR (Status)) { | |
| Dhcp4->Stop (Dhcp4); | |
| Dhcp4->Configure (Dhcp4, NULL); | |
| } else { | |
| ZeroMem (&Config, sizeof (EFI_DHCP4_CONFIG_DATA)); | |
| Dhcp4->Configure (Dhcp4, &Config); | |
| Private->IsAddressOk = TRUE; | |
| } | |
| return Status; | |
| } |