audk/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcSupport.c

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/** @file
Support routines for PxeBc.
Copyright (c) 2007 - 2009, Intel Corporation.<BR>
All rights reserved. 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 function returns SMBIOS string given the string number.
@param Smbios Pointer to SMBIOS structure
@param StringNumber String number to return. 0 is used to skip all
strings and point to the next SMBIOS structure.
@return Pointer to string, or pointer to next SMBIOS strcuture if StringNumber == 0
**/
CHAR8 *
GetSmbiosString (
IN SMBIOS_STRUCTURE_POINTER *Smbios,
IN UINT16 StringNumber
)
{
UINT16 Index;
CHAR8 *String;
//
// Skip over formatted section
//
String = (CHAR8 *) (Smbios->Raw + Smbios->Hdr->Length);
//
// Look through unformated section
//
for (Index = 1; Index <= StringNumber || StringNumber == 0; Index++) {
if (StringNumber == Index) {
return String;
}
//
// Skip string
//
for (; *String != 0; String++)
;
String++;
if (*String == 0) {
//
// If double NULL then we are done.
// Return pointer to next structure in Smbios.
// if you pass in a 0 you will always get here
//
Smbios->Raw = (UINT8 *)++String;
return NULL;
}
}
return NULL;
}
/**
This function gets system guid and serial number from the smbios table.
@param SystemGuid The pointer of returned system guid.
@param SystemSerialNumber The pointer of returned system serial number.
@retval EFI_SUCCESS Successfully get the system guid and system serial
number.
@retval EFI_NOT_FOUND Not find the SMBIOS table.
**/
EFI_STATUS
GetSmbiosSystemGuidAndSerialNumber (
IN EFI_GUID *SystemGuid,
OUT CHAR8 **SystemSerialNumber
)
{
EFI_STATUS Status;
SMBIOS_TABLE_ENTRY_POINT *SmbiosTable;
SMBIOS_STRUCTURE_POINTER Smbios;
SMBIOS_STRUCTURE_POINTER SmbiosEnd;
UINT16 Index;
Status = EfiGetSystemConfigurationTable (&gEfiSmbiosTableGuid, (VOID **) &SmbiosTable);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
Smbios.Hdr = (SMBIOS_STRUCTURE *) (UINTN) SmbiosTable->TableAddress;
SmbiosEnd.Raw = (UINT8 *) (UINTN) (SmbiosTable->TableAddress + SmbiosTable->TableLength);
for (Index = 0; Index < SmbiosTable->TableLength; Index++) {
if (Smbios.Hdr->Type == 1) {
if (Smbios.Hdr->Length < 0x19) {
//
// Older version did not support Guid and Serial number
//
continue;
}
//
// SMBIOS tables are byte packed so we need to do a byte copy to
// prevend alignment faults on Itanium-based platform.
//
CopyMem (SystemGuid, &Smbios.Type1->Uuid, sizeof (EFI_GUID));
*SystemSerialNumber = GetSmbiosString (&Smbios, Smbios.Type1->SerialNumber);
return EFI_SUCCESS;
}
//
// Make Smbios point to the next record
//
GetSmbiosString (&Smbios, 0);
if (Smbios.Raw >= SmbiosEnd.Raw) {
//
// SMBIOS 2.1 incorrectly stated the length of SmbiosTable as 0x1e.
// given this we must double check against the length of the structure.
//
return EFI_SUCCESS;
}
}
return EFI_SUCCESS;
}
/**
The common notify function associated with various PxeBc events.
@param Event The event signaled.
@param Context The context.
@return None
**/
VOID
EFIAPI
PxeBcCommonNotify (
IN EFI_EVENT Event,
IN VOID *Context
)
{
*((BOOLEAN *) Context) = TRUE;
}
/**
This function initialize(or configure) the Udp4Write instance.
@param Udp4 Pointer to the EFI_UDP4_PROTOCOL instance.
@param StationIp Pointer to the station ip address.
@param SubnetMask Pointer to the subnetmask of the station ip address.
@param Gateway Pointer to the gateway ip address.
@param SrcPort Pointer to the srouce port of the station.
@retval EFI_SUCCESS The configuration settings were set, changed, or reset successfully.
@retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more following conditions are TRUE:
@retval EFI_ALREADY_STARTED The EFI UDPv4 Protocol instance is already started/configured
and must be stopped/reset before it can be reconfigured.
@retval EFI_ACCESS_DENIED UdpConfigData. AllowDuplicatePort is FALSE
and UdpConfigData.StationPort is already used by
other instance.
@retval EFI_OUT_OF_RESOURCES The EFI UDPv4 Protocol driver cannot allocate memory for this
EFI UDPv4 Protocol instance.
@retval EFI_DEVICE_ERROR An unexpected network or system error occurred and this instance
was not opened.
@retval Others Please examine the function Udp4->Routes(Udp4, FALSE, &mZeroIp4Addr, &mZeroIp4Addr, Gateway) returns.
**/
EFI_STATUS
PxeBcConfigureUdpWriteInstance (
IN EFI_UDP4_PROTOCOL *Udp4,
IN EFI_IPv4_ADDRESS *StationIp,
IN EFI_IPv4_ADDRESS *SubnetMask,
IN EFI_IPv4_ADDRESS *Gateway,
IN OUT UINT16 *SrcPort
)
{
EFI_UDP4_CONFIG_DATA Udp4CfgData;
EFI_STATUS Status;
ZeroMem (&Udp4CfgData, sizeof (Udp4CfgData));
Udp4CfgData.ReceiveTimeout = 1000;
Udp4CfgData.TypeOfService = DEFAULT_ToS;
Udp4CfgData.TimeToLive = DEFAULT_TTL;
Udp4CfgData.AllowDuplicatePort = TRUE;
CopyMem (&Udp4CfgData.StationAddress, StationIp, sizeof (*StationIp));
CopyMem (&Udp4CfgData.SubnetMask, SubnetMask, sizeof (*SubnetMask));
Udp4CfgData.StationPort = *SrcPort;
//
// Reset the instance.
//
Udp4->Configure (Udp4, NULL);
Status = Udp4->Configure (Udp4, &Udp4CfgData);
if (!EFI_ERROR (Status) && (Gateway->Addr[0] != 0)) {
//
// basic configuration OK, need to add the default route entry
//
Status = Udp4->Routes (Udp4, FALSE, &mZeroIp4Addr, &mZeroIp4Addr, Gateway);
if (EFI_ERROR (Status)) {
//
// roll back
//
Udp4->Configure (Udp4, NULL);
}
}
if (!EFI_ERROR (Status) && (*SrcPort == 0)) {
Udp4->GetModeData (Udp4, &Udp4CfgData, NULL, NULL, NULL);
*SrcPort = Udp4CfgData.StationPort;
}
return Status;
}
/**
Convert number to ASCII value.
@param Number Numeric value to convert to decimal ASCII value.
@param Buffer Buffer to place ASCII version of the Number.
@param Length Length of Buffer.
**/
VOID
CvtNum (
IN UINTN Number,
IN UINT8 *Buffer,
IN UINTN Length
)
{
UINTN Remainder;
while (Length > 0) {
Remainder = Number % 10;
Number /= 10;
Length--;
Buffer[Length] = (UINT8) ('0' + Remainder);
}
}
/**
Convert unsigned int number to decimal number.
@param Number The unsigned int number will be converted.
@param Buffer Pointer to the buffer to store the decimal number after transform.
@return the length of the number after transform.
**/
UINTN
UtoA10 (
IN UINTN Number,
IN CHAR8 *Buffer
)
{
UINTN Index;
CHAR8 TempStr[64];
Index = 63;
TempStr[Index] = 0;
do {
Index--;
TempStr[Index] = (CHAR8) ('0' + (Number % 10));
Number = Number / 10;
} while (Number != 0);
AsciiStrCpy (Buffer, &TempStr[Index]);
return AsciiStrLen (Buffer);
}
/**
Convert ASCII numeric string to a UINTN value.
@param Buffer Pointer to the 8-byte unsigned int value.
@return UINTN value of the ASCII string.
**/
UINT64
AtoU64 (
IN UINT8 *Buffer
)
{
UINT64 Value;
UINT8 Character;
Value = 0;
while ((Character = *Buffer++) != '\0') {
Value = MultU64x32 (Value, 10) + (Character - '0');
}
return Value;
}