mirror of https://github.com/acidanthera/audk.git
1676 lines
52 KiB
C
1676 lines
52 KiB
C
/** @file
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Functions implementation related with DHCPv4 for UefiPxeBc Driver.
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Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "PxeBcImpl.h"
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//
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// This is a map from the interested DHCP4 option tags' index to the tag value.
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//
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UINT8 mInterestedDhcp4Tags[PXEBC_DHCP4_TAG_INDEX_MAX] = {
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DHCP4_TAG_BOOTFILE_LEN,
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DHCP4_TAG_VENDOR,
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DHCP4_TAG_OVERLOAD,
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DHCP4_TAG_MSG_TYPE,
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DHCP4_TAG_SERVER_ID,
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DHCP4_TAG_VENDOR_CLASS_ID,
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DHCP4_TAG_BOOTFILE
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};
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//
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// There are 4 times retries with the value of 4, 8, 16 and 32, refers to PXE2.1 spec.
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//
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UINT32 mPxeDhcpTimeout[4] = {4, 8, 16, 32};
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/**
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Parse a certain dhcp4 option by OptTag in Buffer, and return with start pointer.
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@param[in] Buffer Pointer to the option buffer.
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@param[in] Length Length of the option buffer.
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@param[in] OptTag Tag of the required option.
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@retval NULL Failed to find the required option.
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@retval Others The position of the required option.
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**/
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EFI_DHCP4_PACKET_OPTION *
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PxeBcParseDhcp4Options (
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IN UINT8 *Buffer,
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IN UINT32 Length,
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IN UINT8 OptTag
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)
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{
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EFI_DHCP4_PACKET_OPTION *Option;
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UINT32 Offset;
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Option = (EFI_DHCP4_PACKET_OPTION *) Buffer;
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Offset = 0;
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while (Offset < Length && Option->OpCode != DHCP4_TAG_EOP) {
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if (Option->OpCode == OptTag) {
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//
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// Found the required option.
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//
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return Option;
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}
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//
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// Skip the current option to the next.
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//
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if (Option->OpCode == DHCP4_TAG_PAD) {
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Offset++;
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} else {
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Offset += Option->Length + 2;
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}
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Option = (EFI_DHCP4_PACKET_OPTION *) (Buffer + Offset);
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}
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return NULL;
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}
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/**
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Parse the PXE vender options and extract the information from them.
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@param[in] Dhcp4Option Pointer to vendor options in buffer.
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@param[in] VendorOption Pointer to structure to store information in vendor options.
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**/
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VOID
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PxeBcParseVendorOptions (
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IN EFI_DHCP4_PACKET_OPTION *Dhcp4Option,
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IN PXEBC_VENDOR_OPTION *VendorOption
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)
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{
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UINT32 *BitMap;
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UINT8 VendorOptionLen;
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EFI_DHCP4_PACKET_OPTION *PxeOption;
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UINT8 Offset;
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BitMap = VendorOption->BitMap;
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VendorOptionLen = Dhcp4Option->Length;
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PxeOption = (EFI_DHCP4_PACKET_OPTION *) &Dhcp4Option->Data[0];
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Offset = 0;
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ASSERT (PxeOption != NULL);
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while ((Offset < VendorOptionLen) && (PxeOption->OpCode != DHCP4_TAG_EOP)) {
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//
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// Parse all the interesting PXE vendor options one by one.
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//
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switch (PxeOption->OpCode) {
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case PXEBC_VENDOR_TAG_MTFTP_IP:
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CopyMem (&VendorOption->MtftpIp, PxeOption->Data, sizeof (EFI_IPv4_ADDRESS));
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break;
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case PXEBC_VENDOR_TAG_MTFTP_CPORT:
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CopyMem (&VendorOption->MtftpCPort, PxeOption->Data, sizeof (VendorOption->MtftpCPort));
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break;
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case PXEBC_VENDOR_TAG_MTFTP_SPORT:
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CopyMem (&VendorOption->MtftpSPort, PxeOption->Data, sizeof (VendorOption->MtftpSPort));
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break;
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case PXEBC_VENDOR_TAG_MTFTP_TIMEOUT:
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VendorOption->MtftpTimeout = *PxeOption->Data;
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break;
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case PXEBC_VENDOR_TAG_MTFTP_DELAY:
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VendorOption->MtftpDelay = *PxeOption->Data;
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break;
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case PXEBC_VENDOR_TAG_DISCOVER_CTRL:
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VendorOption->DiscoverCtrl = *PxeOption->Data;
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break;
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case PXEBC_VENDOR_TAG_DISCOVER_MCAST:
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CopyMem (&VendorOption->DiscoverMcastIp, PxeOption->Data, sizeof (EFI_IPv4_ADDRESS));
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break;
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case PXEBC_VENDOR_TAG_BOOT_SERVERS:
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VendorOption->BootSvrLen = PxeOption->Length;
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VendorOption->BootSvr = (PXEBC_BOOT_SVR_ENTRY *) PxeOption->Data;
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break;
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case PXEBC_VENDOR_TAG_BOOT_MENU:
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VendorOption->BootMenuLen = PxeOption->Length;
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VendorOption->BootMenu = (PXEBC_BOOT_MENU_ENTRY *) PxeOption->Data;
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break;
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case PXEBC_VENDOR_TAG_MENU_PROMPT:
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VendorOption->MenuPromptLen = PxeOption->Length;
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VendorOption->MenuPrompt = (PXEBC_MENU_PROMPT *) PxeOption->Data;
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break;
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case PXEBC_VENDOR_TAG_MCAST_ALLOC:
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CopyMem (&VendorOption->McastIpBase, PxeOption->Data, sizeof (EFI_IPv4_ADDRESS));
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CopyMem (&VendorOption->McastIpBlock, PxeOption->Data + 4, sizeof (VendorOption->McastIpBlock));
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CopyMem (&VendorOption->McastIpRange, PxeOption->Data + 6, sizeof (VendorOption->McastIpRange));
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break;
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case PXEBC_VENDOR_TAG_CREDENTIAL_TYPES:
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VendorOption->CredTypeLen = PxeOption->Length;
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VendorOption->CredType = (UINT32 *) PxeOption->Data;
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break;
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case PXEBC_VENDOR_TAG_BOOT_ITEM:
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CopyMem (&VendorOption->BootSrvType, PxeOption->Data, sizeof (VendorOption->BootSrvType));
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CopyMem (&VendorOption->BootSrvLayer, PxeOption->Data + 2, sizeof (VendorOption->BootSrvLayer));
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break;
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default:
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//
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// Not interesting PXE vendor options.
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//
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break;
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}
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//
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// Set the bit map for the special PXE options.
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//
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SET_VENDOR_OPTION_BIT_MAP (BitMap, PxeOption->OpCode);
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//
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// Continue to the next option.
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//
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if (PxeOption->OpCode == DHCP4_TAG_PAD) {
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Offset++;
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} else {
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Offset = (UINT8) (Offset + PxeOption->Length + 2);
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}
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PxeOption = (EFI_DHCP4_PACKET_OPTION *) (Dhcp4Option->Data + Offset);
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}
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}
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/**
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Build the options buffer for the DHCPv4 request packet.
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@param[in] Private Pointer to PxeBc private data.
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@param[out] OptList Pointer to the option pointer array.
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@param[in] Buffer Pointer to the buffer to contain the option list.
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@param[in] NeedMsgType If TRUE, it is necessary to include the Msg type option.
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Otherwise, it is not necessary.
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@return Index The count of the built-in options.
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**/
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UINT32
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PxeBcBuildDhcp4Options (
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IN PXEBC_PRIVATE_DATA *Private,
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OUT EFI_DHCP4_PACKET_OPTION **OptList,
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IN UINT8 *Buffer,
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IN BOOLEAN NeedMsgType
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)
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{
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UINT32 Index;
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PXEBC_DHCP4_OPTION_ENTRY OptEnt;
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UINT16 Value;
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Index = 0;
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OptList[0] = (EFI_DHCP4_PACKET_OPTION *) Buffer;
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if (NeedMsgType) {
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//
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// Append message type.
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//
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OptList[Index]->OpCode = DHCP4_TAG_MSG_TYPE;
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OptList[Index]->Length = 1;
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OptEnt.Mesg = (PXEBC_DHCP4_OPTION_MESG *) OptList[Index]->Data;
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OptEnt.Mesg->Type = PXEBC_DHCP4_MSG_TYPE_REQUEST;
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Index++;
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OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]);
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//
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// Append max message size.
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//
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OptList[Index]->OpCode = DHCP4_TAG_MAXMSG;
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OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_MAX_MESG_SIZE);
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OptEnt.MaxMesgSize = (PXEBC_DHCP4_OPTION_MAX_MESG_SIZE *) OptList[Index]->Data;
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Value = NTOHS (PXEBC_DHCP4_PACKET_MAX_SIZE - 8);
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CopyMem (&OptEnt.MaxMesgSize->Size, &Value, sizeof (UINT16));
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Index++;
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OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]);
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}
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//
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// Append parameter request list option.
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//
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OptList[Index]->OpCode = DHCP4_TAG_PARA_LIST;
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OptList[Index]->Length = 35;
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OptEnt.Para = (PXEBC_DHCP4_OPTION_PARA *) OptList[Index]->Data;
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OptEnt.Para->ParaList[0] = DHCP4_TAG_NETMASK;
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OptEnt.Para->ParaList[1] = DHCP4_TAG_TIME_OFFSET;
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OptEnt.Para->ParaList[2] = DHCP4_TAG_ROUTER;
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OptEnt.Para->ParaList[3] = DHCP4_TAG_TIME_SERVER;
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OptEnt.Para->ParaList[4] = DHCP4_TAG_NAME_SERVER;
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OptEnt.Para->ParaList[5] = DHCP4_TAG_DNS_SERVER;
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OptEnt.Para->ParaList[6] = DHCP4_TAG_HOSTNAME;
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OptEnt.Para->ParaList[7] = DHCP4_TAG_BOOTFILE_LEN;
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OptEnt.Para->ParaList[8] = DHCP4_TAG_DOMAINNAME;
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OptEnt.Para->ParaList[9] = DHCP4_TAG_ROOTPATH;
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OptEnt.Para->ParaList[10] = DHCP4_TAG_EXTEND_PATH;
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OptEnt.Para->ParaList[11] = DHCP4_TAG_EMTU;
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OptEnt.Para->ParaList[12] = DHCP4_TAG_TTL;
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OptEnt.Para->ParaList[13] = DHCP4_TAG_BROADCAST;
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OptEnt.Para->ParaList[14] = DHCP4_TAG_NIS_DOMAIN;
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OptEnt.Para->ParaList[15] = DHCP4_TAG_NIS_SERVER;
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OptEnt.Para->ParaList[16] = DHCP4_TAG_NTP_SERVER;
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OptEnt.Para->ParaList[17] = DHCP4_TAG_VENDOR;
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OptEnt.Para->ParaList[18] = DHCP4_TAG_REQUEST_IP;
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OptEnt.Para->ParaList[19] = DHCP4_TAG_LEASE;
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OptEnt.Para->ParaList[20] = DHCP4_TAG_SERVER_ID;
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OptEnt.Para->ParaList[21] = DHCP4_TAG_T1;
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OptEnt.Para->ParaList[22] = DHCP4_TAG_T2;
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OptEnt.Para->ParaList[23] = DHCP4_TAG_VENDOR_CLASS_ID;
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OptEnt.Para->ParaList[24] = DHCP4_TAG_TFTP;
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OptEnt.Para->ParaList[25] = DHCP4_TAG_BOOTFILE;
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OptEnt.Para->ParaList[26] = DHCP4_TAG_UUID;
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OptEnt.Para->ParaList[27] = 0x80;
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OptEnt.Para->ParaList[28] = 0x81;
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OptEnt.Para->ParaList[29] = 0x82;
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OptEnt.Para->ParaList[30] = 0x83;
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OptEnt.Para->ParaList[31] = 0x84;
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OptEnt.Para->ParaList[32] = 0x85;
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OptEnt.Para->ParaList[33] = 0x86;
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OptEnt.Para->ParaList[34] = 0x87;
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Index++;
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OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]);
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//
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// Append UUID/Guid-based client identifier option
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//
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OptList[Index]->OpCode = DHCP4_TAG_UUID;
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OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_UUID);
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OptEnt.Uuid = (PXEBC_DHCP4_OPTION_UUID *) OptList[Index]->Data;
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OptEnt.Uuid->Type = 0;
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Index++;
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OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]);
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if (EFI_ERROR (NetLibGetSystemGuid ((EFI_GUID *) OptEnt.Uuid->Guid))) {
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//
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// Zero the Guid to indicate NOT programable if failed to get system Guid.
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//
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ZeroMem (OptEnt.Uuid->Guid, sizeof (EFI_GUID));
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}
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//
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// Append client network device interface option
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//
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OptList[Index]->OpCode = DHCP4_TAG_UNDI;
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OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_UNDI);
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OptEnt.Undi = (PXEBC_DHCP4_OPTION_UNDI *) OptList[Index]->Data;
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if (Private->Nii != NULL) {
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OptEnt.Undi->Type = Private->Nii->Type;
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OptEnt.Undi->MajorVer = Private->Nii->MajorVer;
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OptEnt.Undi->MinorVer = Private->Nii->MinorVer;
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} else {
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OptEnt.Undi->Type = DEFAULT_UNDI_TYPE;
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OptEnt.Undi->MajorVer = DEFAULT_UNDI_MAJOR;
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OptEnt.Undi->MinorVer = DEFAULT_UNDI_MINOR;
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}
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Index++;
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OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]);
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//
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// Append client system architecture option
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//
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OptList[Index]->OpCode = DHCP4_TAG_ARCH;
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OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_ARCH);
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OptEnt.Arch = (PXEBC_DHCP4_OPTION_ARCH *) OptList[Index]->Data;
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Value = HTONS (EFI_PXE_CLIENT_SYSTEM_ARCHITECTURE);
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CopyMem (&OptEnt.Arch->Type, &Value, sizeof (UINT16));
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Index++;
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OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]);
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//
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// Append vendor class identify option
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//
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OptList[Index]->OpCode = DHCP4_TAG_VENDOR_CLASS_ID;
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OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_CLID);
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OptEnt.Clid = (PXEBC_DHCP4_OPTION_CLID *) OptList[Index]->Data;
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CopyMem (
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OptEnt.Clid,
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DEFAULT_CLASS_ID_DATA,
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sizeof (PXEBC_DHCP4_OPTION_CLID)
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);
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PxeBcUintnToAscDecWithFormat (
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EFI_PXE_CLIENT_SYSTEM_ARCHITECTURE,
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OptEnt.Clid->ArchitectureType,
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sizeof (OptEnt.Clid->ArchitectureType)
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);
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if (Private->Nii != NULL) {
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CopyMem (OptEnt.Clid->InterfaceName, Private->Nii->StringId, sizeof (OptEnt.Clid->InterfaceName));
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PxeBcUintnToAscDecWithFormat (Private->Nii->MajorVer, OptEnt.Clid->UndiMajor, sizeof (OptEnt.Clid->UndiMajor));
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PxeBcUintnToAscDecWithFormat (Private->Nii->MinorVer, OptEnt.Clid->UndiMinor, sizeof (OptEnt.Clid->UndiMinor));
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}
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Index++;
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return Index;
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}
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/**
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Create a template DHCPv4 packet as a seed.
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@param[out] Seed Pointer to the seed packet.
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@param[in] Udp4 Pointer to EFI_UDP4_PROTOCOL.
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**/
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VOID
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PxeBcSeedDhcp4Packet (
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OUT EFI_DHCP4_PACKET *Seed,
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IN EFI_UDP4_PROTOCOL *Udp4
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)
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{
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EFI_SIMPLE_NETWORK_MODE Mode;
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EFI_DHCP4_HEADER *Header;
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//
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// Get IfType and HwAddressSize from SNP mode data.
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//
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Udp4->GetModeData (Udp4, NULL, NULL, NULL, &Mode);
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Seed->Size = sizeof (EFI_DHCP4_PACKET);
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Seed->Length = sizeof (Seed->Dhcp4);
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Header = &Seed->Dhcp4.Header;
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ZeroMem (Header, sizeof (EFI_DHCP4_HEADER));
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Header->OpCode = PXEBC_DHCP4_OPCODE_REQUEST;
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Header->HwType = Mode.IfType;
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Header->HwAddrLen = (UINT8) Mode.HwAddressSize;
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CopyMem (Header->ClientHwAddr, &Mode.CurrentAddress, Header->HwAddrLen);
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Seed->Dhcp4.Magik = PXEBC_DHCP4_MAGIC;
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Seed->Dhcp4.Option[0] = DHCP4_TAG_EOP;
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}
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|
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/**
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Cache the DHCPv4 packet.
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@param[in] Dst Pointer to the cache buffer for DHCPv4 packet.
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@param[in] Src Pointer to the DHCPv4 packet to be cached.
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**/
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VOID
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PxeBcCacheDhcp4Packet (
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IN EFI_DHCP4_PACKET *Dst,
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IN EFI_DHCP4_PACKET *Src
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)
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{
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ASSERT (Dst->Size >= Src->Length);
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CopyMem (&Dst->Dhcp4, &Src->Dhcp4, Src->Length);
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Dst->Length = Src->Length;
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}
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|
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/**
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Parse the cached DHCPv4 packet, including all the options.
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@param[in] Cache4 Pointer to cached DHCPv4 packet.
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@retval EFI_SUCCESS Parsed the DHCPv4 packet successfully.
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@retval EFI_DEVICE_ERROR Failed to parse and invalid packet.
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**/
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EFI_STATUS
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PxeBcParseDhcp4Packet (
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IN PXEBC_DHCP4_PACKET_CACHE *Cache4
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)
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{
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EFI_DHCP4_PACKET *Offer;
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EFI_DHCP4_PACKET_OPTION **Options;
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EFI_DHCP4_PACKET_OPTION *Option;
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PXEBC_OFFER_TYPE OfferType;
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UINTN Index;
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BOOLEAN IsProxyOffer;
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BOOLEAN IsPxeOffer;
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UINT8 *Ptr8;
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BOOLEAN FileFieldOverloaded;
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IsProxyOffer = FALSE;
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IsPxeOffer = FALSE;
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FileFieldOverloaded = FALSE;
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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.
|
|
|
|
**/
|
|
VOID
|
|
PxeBcCopyDhcp4Ack (
|
|
IN PXEBC_PRIVATE_DATA *Private,
|
|
IN EFI_DHCP4_PACKET *Ack,
|
|
IN BOOLEAN Verified
|
|
)
|
|
{
|
|
EFI_PXE_BASE_CODE_MODE *Mode;
|
|
|
|
Mode = Private->PxeBc.Mode;
|
|
|
|
PxeBcCacheDhcp4Packet (&Private->DhcpAck.Dhcp4.Packet.Ack, Ack);
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
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.
|
|
|
|
**/
|
|
VOID
|
|
PxeBcCopyProxyOffer (
|
|
IN PXEBC_PRIVATE_DATA *Private,
|
|
IN UINT32 OfferIndex
|
|
)
|
|
{
|
|
EFI_PXE_BASE_CODE_MODE *Mode;
|
|
EFI_DHCP4_PACKET *Offer;
|
|
|
|
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.
|
|
//
|
|
PxeBcCacheDhcp4Packet (&Private->ProxyOffer.Dhcp4.Packet.Offer, Offer);
|
|
PxeBcParseDhcp4Packet (&Private->ProxyOffer.Dhcp4);
|
|
|
|
//
|
|
// Store this packet into mode data.
|
|
//
|
|
CopyMem (&Mode->ProxyOffer.Dhcpv4, &Offer->Dhcp4, Offer->Length);
|
|
Mode->ProxyOfferReceived = TRUE;
|
|
}
|
|
|
|
|
|
/**
|
|
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.
|
|
|
|
**/
|
|
VOID
|
|
PxeBcCacheDhcp4Offer (
|
|
IN PXEBC_PRIVATE_DATA *Private,
|
|
IN EFI_DHCP4_PACKET *RcvdOffer
|
|
)
|
|
{
|
|
PXEBC_DHCP4_PACKET_CACHE *Cache4;
|
|
EFI_DHCP4_PACKET *Offer;
|
|
PXEBC_OFFER_TYPE OfferType;
|
|
|
|
ASSERT (Private->OfferNum < PXEBC_OFFER_MAX_NUM);
|
|
Cache4 = &Private->OfferBuffer[Private->OfferNum].Dhcp4;
|
|
Offer = &Cache4->Packet.Offer;
|
|
|
|
//
|
|
// Cache the content of DHCPv4 packet firstly.
|
|
//
|
|
PxeBcCacheDhcp4Packet (Offer, RcvdOffer);
|
|
|
|
//
|
|
// Validate the DHCPv4 packet, and parse the options and offer type.
|
|
//
|
|
if (EFI_ERROR (PxeBcParseDhcp4Packet (Cache4))) {
|
|
return;
|
|
}
|
|
|
|
//
|
|
// 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;
|
|
}
|
|
} 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 (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 ;
|
|
}
|
|
} 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++;
|
|
}
|
|
|
|
|
|
/**
|
|
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.
|
|
|
|
**/
|
|
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.
|
|
//
|
|
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;
|
|
}
|
|
|
|
PxeBcCopyDhcp4Ack (Private, Ack, TRUE);
|
|
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;
|
|
}
|
|
|
|
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 - 8);
|
|
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:
|
|
//
|
|
// 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 (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.
|
|
//
|
|
ZeroMem (Packet->Dhcp4.Header.ClientHwAddr, sizeof (EFI_GUID));
|
|
}
|
|
Packet->Dhcp4.Header.HwAddrLen = (UINT8) sizeof (EFI_GUID);
|
|
}
|
|
break;
|
|
|
|
case Dhcp4RcvdOffer:
|
|
Status = EFI_NOT_READY;
|
|
if (Private->OfferNum < PXEBC_OFFER_MAX_NUM) {
|
|
//
|
|
// Cache the DHCPv4 offers to OfferBuffer[] for select later, and record
|
|
// the OfferIndex and OfferCount.
|
|
//
|
|
PxeBcCacheDhcp4Offer (Private, Packet);
|
|
}
|
|
break;
|
|
|
|
case Dhcp4SelectOffer:
|
|
//
|
|
// 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);
|
|
|
|
PxeBcCopyDhcp4Ack (Private, Packet, FALSE);
|
|
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.
|
|
//
|
|
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) {
|
|
|
|
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) {
|
|
PxeBcCacheDhcp4Packet (&Private->PxeReply.Dhcp4.Packet.Ack, Response);
|
|
CopyMem (&Mode->PxeDiscover, &Token.Packet->Dhcp4, Token.Packet->Length);
|
|
} else {
|
|
PxeBcCacheDhcp4Packet (&Private->ProxyOffer.Dhcp4.Packet.Offer, Response);
|
|
}
|
|
} else {
|
|
//
|
|
// Not found the right PXE reply packet.
|
|
//
|
|
Status = EFI_NOT_FOUND;
|
|
}
|
|
if (Token.ResponseList != NULL) {
|
|
FreePool (Token.ResponseList);
|
|
}
|
|
}
|
|
|
|
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));
|
|
|
|
//
|
|
// Start DHCPv4 D.O.R.A. process to acquire IPv4 address. This may
|
|
// have already been done, thus do not leave in error if the return
|
|
// code is EFI_ALREADY_STARTED.
|
|
//
|
|
Status = Dhcp4->Start (Dhcp4, NULL);
|
|
if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
|
|
if (Status == EFI_ICMP_ERROR) {
|
|
PxeMode->IcmpErrorReceived = TRUE;
|
|
}
|
|
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;
|
|
}
|