mirror of https://github.com/acidanthera/audk.git
843 lines
19 KiB
C
843 lines
19 KiB
C
/** @file
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Miscellaneous routines for IScsi driver.
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Copyright (c) 2004 - 2008, Intel Corporation
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All rights reserved. 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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Module Name:
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IScsiMisc.c
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Abstract:
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Miscellaneous routines for IScsi driver.
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**/
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#include "IScsiImpl.h"
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STATIC CONST CHAR8 IScsiHexString[] = "0123456789ABCDEFabcdef";
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/**
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Removes (trims) specified leading and trailing characters from a string.
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@param str[in][out] Pointer to the null-terminated string to be trimmed. On return,
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str will hold the trimmed string.
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@param CharC[in] Character will be trimmed from str.
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@retval NONE.
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**/
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static
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VOID
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StrTrim (
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IN OUT CHAR16 *str,
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IN CHAR16 CharC
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)
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{
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CHAR16 *p1;
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CHAR16 *p2;
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if (*str == 0) {
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return;
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}
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//
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// Trim off the leading and trailing characters c
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//
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for (p1 = str; *p1 && *p1 == CharC; p1++) {
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;
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}
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p2 = str;
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if (p2 == p1) {
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while (*p1) {
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p2++;
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p1++;
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}
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} else {
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while (*p1) {
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*p2 = *p1;
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p1++;
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p2++;
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}
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*p2 = 0;
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}
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for (p1 = str + StrLen(str) - 1; p1 >= str && *p1 == CharC; p1--) {
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;
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}
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if (p1 != str + StrLen(str) - 1) {
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*(p1 + 1) = 0;
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}
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}
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/**
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Calculate the prefix length of the IPv4 subnet mask.
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@param SubnetMask[in] The IPv4 subnet mask.
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@retval The prefix length of the subnet mask.
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**/
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UINT8
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IScsiGetSubnetMaskPrefixLength (
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IN EFI_IPv4_ADDRESS *SubnetMask
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)
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{
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UINT8 Len;
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UINT32 ReverseMask;
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//
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// The SubnetMask is in network byte order.
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//
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ReverseMask = (SubnetMask->Addr[0] << 24) | (SubnetMask->Addr[1] << 16) | (SubnetMask->Addr[2] << 8) | (SubnetMask->Addr[3]);
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//
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// Reverse it.
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//
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ReverseMask = ~ReverseMask;
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if (ReverseMask & (ReverseMask + 1)) {
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return 0;
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}
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Len = 0;
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while (ReverseMask != 0) {
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ReverseMask = ReverseMask >> 1;
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Len++;
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}
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return (UINT8) (32 - Len);
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}
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/**
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Convert the hexadecimal encoded LUN string into the 64-bit LUN.
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@param Str[in] The hexadecimal encoded LUN string.
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@param Lun[out] Storage to return the 64-bit LUN.
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@retval EFI_SUCCESS The 64-bit LUN is stored in Lun.
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@retval EFI_INVALID_PARAMETER The string is malformatted.
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**/
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EFI_STATUS
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IScsiAsciiStrToLun (
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IN CHAR8 *Str,
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OUT UINT8 *Lun
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)
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{
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UINT32 Index;
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CHAR8 *LunUnitStr[4];
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CHAR8 Digit;
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UINTN Temp;
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ZeroMem (Lun, 8);
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ZeroMem (LunUnitStr, sizeof (LunUnitStr));
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Index = 0;
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LunUnitStr[0] = Str;
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if (!IsHexDigit ((UINT8 *) &Digit, *Str)) {
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return EFI_INVALID_PARAMETER;
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}
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while (*Str != '\0') {
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//
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// Legal representations of LUN:
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// 4752-3A4F-6b7e-2F99,
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// 6734-9-156f-127,
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// 4186-9
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//
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if (*Str == '-') {
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*Str = '\0';
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Index++;
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if (*(Str + 1) != '\0') {
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if (!IsHexDigit ((UINT8 *) &Digit, *(Str + 1))) {
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return EFI_INVALID_PARAMETER;
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}
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LunUnitStr[Index] = Str + 1;
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}
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} else if (!IsHexDigit ((UINT8 *) &Digit, *Str)) {
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return EFI_INVALID_PARAMETER;
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}
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Str++;
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}
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for (Index = 0; (Index < 4) && (LunUnitStr[Index] != NULL); Index++) {
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if (AsciiStrLen (LunUnitStr[Index]) > 4) {
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return EFI_INVALID_PARAMETER;
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}
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Temp = AsciiStrHexToUintn (LunUnitStr[Index]);
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*((UINT16 *) &Lun[Index * 2]) = HTONS (Temp);
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}
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return EFI_SUCCESS;
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}
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/**
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Convert the 64-bit LUN into the hexadecimal encoded LUN string.
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@param Lun[in] The 64-bit LUN.
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@param Str[out] The storage to return the hexadecimal encoded LUN string.
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@retval None.
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**/
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VOID
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IScsiLunToUnicodeStr (
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IN UINT8 *Lun,
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OUT CHAR16 *Str
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)
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{
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UINTN Index;
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CHAR16 *TempStr;
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TempStr = Str;
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for (Index = 0; Index < 4; Index++) {
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if ((Lun[2 * Index] | Lun[2 * Index + 1]) == 0) {
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StrCpy (TempStr, L"0-");
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} else {
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TempStr[0] = (CHAR16) IScsiHexString[Lun[2 * Index] >> 4];
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TempStr[1] = (CHAR16) IScsiHexString[Lun[2 * Index] & 0xf];
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TempStr[2] = (CHAR16) IScsiHexString[Lun[2 * Index + 1] >> 4];
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TempStr[3] = (CHAR16) IScsiHexString[Lun[2 * Index + 1] & 0xf];
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TempStr[4] = L'-';
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TempStr[5] = 0;
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StrTrim (TempStr, L'0');
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}
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TempStr += StrLen (TempStr);
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}
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Str[StrLen (Str) - 1] = 0;
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for (Index = StrLen (Str) - 1; Index > 1; Index = Index - 2) {
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if ((Str[Index] == L'0') && (Str[Index - 1] == L'-')) {
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Str[Index - 1] = 0;
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} else {
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break;
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}
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}
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}
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/**
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Convert the ASCII string into a UNICODE string.
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@param Source[out] The ASCII string.
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@param Destination[out] The storage to return the UNICODE string.
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@retval CHAR16 * Pointer to the UNICODE string.
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**/
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CHAR16 *
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IScsiAsciiStrToUnicodeStr (
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IN CHAR8 *Source,
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OUT CHAR16 *Destination
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)
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{
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ASSERT (Destination != NULL);
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ASSERT (Source != NULL);
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while (*Source != '\0') {
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*(Destination++) = (CHAR16) *(Source++);
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}
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*Destination = '\0';
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return Destination;
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}
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/**
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Convert the UNICODE string into an ASCII string.
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@param Source[in] The UNICODE string.
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@param Destination[out] The storage to return the ASCII string.
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@retval CHAR8 * Pointer to the ASCII string.
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**/
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CHAR8 *
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IScsiUnicodeStrToAsciiStr (
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IN CHAR16 *Source,
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OUT CHAR8 *Destination
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)
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{
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ASSERT (Destination != NULL);
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ASSERT (Source != NULL);
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while (*Source != '\0') {
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//
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// If any Unicode characters in Source contain
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// non-zero value in the upper 8 bits, then ASSERT().
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//
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ASSERT (*Source < 0x100);
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*(Destination++) = (CHAR8) *(Source++);
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}
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*Destination = '\0';
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return Destination;
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}
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/**
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Convert the decimal dotted IPv4 address into the binary IPv4 address.
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@param Str[in] The UNICODE string.
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@param Ip[out] The storage to return the ASCII string.
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@retval EFI_SUCCESS The binary IP address is returned in Ip.
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@retval EFI_INVALID_PARAMETER The IP string is malformatted.
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**/
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EFI_STATUS
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IScsiAsciiStrToIp (
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IN CHAR8 *Str,
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OUT EFI_IPv4_ADDRESS *Ip
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)
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{
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UINTN Index;
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UINTN Number;
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Index = 0;
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while (*Str) {
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if (Index > 3) {
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return EFI_INVALID_PARAMETER;
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}
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Number = 0;
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while (NET_IS_DIGIT (*Str)) {
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Number = Number * 10 + (*Str - '0');
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Str++;
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}
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if (Number > 0xFF) {
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return EFI_INVALID_PARAMETER;
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}
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Ip->Addr[Index] = (UINT8) Number;
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if ((*Str != '\0') && (*Str != '.')) {
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//
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// The current character should be either the NULL terminator or
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// the dot delimiter.
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//
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return EFI_INVALID_PARAMETER;
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}
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if (*Str == '.') {
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//
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// Skip the delimiter.
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//
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Str++;
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}
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Index++;
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}
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if (Index != 4) {
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return EFI_INVALID_PARAMETER;
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}
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return EFI_SUCCESS;
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}
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/**
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Convert the mac address into a hexadecimal encoded "-" seperated string.
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@param Mac[in] The mac address.
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@param Len[in] Length in bytes of the mac address.
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@param Str[out] The storage to return the mac string.
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@retval None.
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**/
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VOID
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IScsiMacAddrToStr (
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IN EFI_MAC_ADDRESS *Mac,
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IN UINT32 Len,
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OUT CHAR16 *Str
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)
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{
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UINT32 Index;
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for (Index = 0; Index < Len; Index++) {
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Str[3 * Index] = NibbleToHexChar ((UINT8) (Mac->Addr[Index] >> 4));
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Str[3 * Index + 1] = NibbleToHexChar (Mac->Addr[Index]);
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Str[3 * Index + 2] = L'-';
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}
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Str[3 * Index - 1] = L'\0';
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}
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/**
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Convert the binary encoded buffer into a hexadecimal encoded string.
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@param BinBuffer[in] The buffer containing the binary data.
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@param BinLength[in] Length of the binary buffer.
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@param HexStr[in][out] Pointer to the string.
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@param HexLength[in][out] The length of the string.
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@retval EFI_SUCCESS The binary data is converted to the hexadecimal string
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and the length of the string is updated.
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@retval EFI_BUFFER_TOO_SMALL The string is too small.
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**/
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EFI_STATUS
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IScsiBinToHex (
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IN UINT8 *BinBuffer,
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IN UINT32 BinLength,
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IN OUT CHAR8 *HexStr,
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IN OUT UINT32 *HexLength
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)
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{
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UINTN Index;
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if ((HexStr == NULL) || (BinBuffer == NULL) || (BinLength == 0)) {
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return EFI_INVALID_PARAMETER;
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}
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if (((*HexLength) - 3) < BinLength * 2) {
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*HexLength = BinLength * 2 + 3;
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return EFI_BUFFER_TOO_SMALL;
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}
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*HexLength = BinLength * 2 + 3;
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//
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// Prefix for Hex String
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//
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HexStr[0] = '0';
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HexStr[1] = 'x';
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for (Index = 0; Index < BinLength; Index++) {
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HexStr[Index * 2 + 2] = IScsiHexString[BinBuffer[Index] >> 4];
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HexStr[Index * 2 + 3] = IScsiHexString[BinBuffer[Index] & 0xf];
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}
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HexStr[Index * 2 + 2] = '\0';
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return EFI_SUCCESS;
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}
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/**
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Convert the hexadecimal string into a binary encoded buffer.
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@param BinBuffer[in][out] The binary buffer.
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@param BinLength[in][out] Length of the binary buffer.
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@param HexStr[in] The hexadecimal string.
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@retval EFI_SUCCESS The hexadecimal string is converted into a binary
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encoded buffer.
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@retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the converted data.s
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**/
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EFI_STATUS
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IScsiHexToBin (
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IN OUT UINT8 *BinBuffer,
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IN OUT UINT32 *BinLength,
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IN CHAR8 *HexStr
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)
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{
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UINTN Index;
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UINT32 HexCount;
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CHAR8 *HexBuf;
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UINT8 Digit;
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UINT8 Byte;
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Digit = 0;
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//
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// Find out how many hex characters the string has.
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//
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HexBuf = HexStr;
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if ((HexBuf[0] == '0') && ((HexBuf[1] == 'x') || (HexBuf[1] == 'X'))) {
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HexBuf += 2;
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}
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for (Index = 0, HexCount = 0; IsHexDigit (&Digit, HexBuf[Index]); Index++, HexCount++)
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;
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if (HexCount == 0) {
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*BinLength = 0;
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return EFI_SUCCESS;
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}
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//
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// Test if buffer is passed enough.
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//
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if (((HexCount + 1) / 2) > *BinLength) {
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*BinLength = (HexCount + 1) / 2;
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return EFI_BUFFER_TOO_SMALL;
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}
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*BinLength = (HexCount + 1) / 2;
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for (Index = 0; Index < HexCount; Index++) {
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IsHexDigit (&Digit, HexBuf[HexCount - 1 - Index]);
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if ((Index & 1) == 0) {
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Byte = Digit;
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} else {
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Byte = BinBuffer[*BinLength - 1 - Index / 2];
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Byte &= 0x0F;
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Byte = (UINT8) (Byte | (Digit << 4));
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}
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BinBuffer[*BinLength - 1 - Index / 2] = Byte;
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}
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return EFI_SUCCESS;
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}
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/**
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Generate random numbers.
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@param Rand[in][out] The buffer to contain random numbers.
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@param RandLength[in] The length of the Rand buffer.
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@retval None.
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**/
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VOID
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IScsiGenRandom (
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IN OUT UINT8 *Rand,
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IN UINTN RandLength
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)
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{
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UINT32 Random;
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while (RandLength > 0) {
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Random = NET_RANDOM (NetRandomInitSeed ());
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*Rand++ = (UINT8) (Random);
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RandLength--;
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}
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}
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/**
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Create the iSCSI driver data..
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@param Image[in] The handle of the driver image.
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@param Controller[in] The handle of the controller.
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@retval The iSCSI driver data created.
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**/
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ISCSI_DRIVER_DATA *
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IScsiCreateDriverData (
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IN EFI_HANDLE Image,
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IN EFI_HANDLE Controller
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)
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{
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ISCSI_DRIVER_DATA *Private;
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EFI_STATUS Status;
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Private = AllocateZeroPool (sizeof (ISCSI_DRIVER_DATA));
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if (Private == NULL) {
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return NULL;
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}
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Private->Signature = ISCSI_DRIVER_DATA_SIGNATURE;
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Private->Image = Image;
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Private->Controller = Controller;
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//
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// Create an event to be signal when the BS to RT transition is triggerd so
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// as to abort the iSCSI session.
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//
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Status = gBS->CreateEvent (
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EFI_EVENT_SIGNAL_EXIT_BOOT_SERVICES,
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TPL_CALLBACK,
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IScsiOnExitBootService,
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Private,
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&Private->ExitBootServiceEvent
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);
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if (EFI_ERROR (Status)) {
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gBS->FreePool (Private);
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return NULL;
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}
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CopyMem(&Private->IScsiExtScsiPassThru, &gIScsiExtScsiPassThruProtocolTemplate, sizeof(EFI_EXT_SCSI_PASS_THRU_PROTOCOL));
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//
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// 0 is designated to the TargetId, so use another value for the AdapterId.
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//
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Private->ExtScsiPassThruMode.AdapterId = 2;
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Private->ExtScsiPassThruMode.Attributes = EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_PHYSICAL | EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_LOGICAL;
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Private->ExtScsiPassThruMode.IoAlign = 4;
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Private->IScsiExtScsiPassThru.Mode = &Private->ExtScsiPassThruMode;
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//
|
|
// Install the Ext SCSI PASS THRU protocol.
|
|
//
|
|
Status = gBS->InstallProtocolInterface (
|
|
&Private->ExtScsiPassThruHandle,
|
|
&gEfiExtScsiPassThruProtocolGuid,
|
|
EFI_NATIVE_INTERFACE,
|
|
&Private->IScsiExtScsiPassThru
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
gBS->CloseEvent (Private->ExitBootServiceEvent);
|
|
gBS->FreePool (Private);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
IScsiSessionInit (&Private->Session, FALSE);
|
|
|
|
return Private;
|
|
}
|
|
|
|
/**
|
|
Clean the iSCSI driver data.
|
|
|
|
@param Private[in] The iSCSI driver data.
|
|
|
|
@retval None.
|
|
|
|
**/
|
|
VOID
|
|
IScsiCleanDriverData (
|
|
IN ISCSI_DRIVER_DATA *Private
|
|
)
|
|
{
|
|
if (Private->DevicePath != NULL) {
|
|
gBS->UninstallProtocolInterface (
|
|
Private->ExtScsiPassThruHandle,
|
|
&gEfiDevicePathProtocolGuid,
|
|
Private->DevicePath
|
|
);
|
|
|
|
gBS->FreePool (Private->DevicePath);
|
|
}
|
|
|
|
if (Private->ExtScsiPassThruHandle != NULL) {
|
|
gBS->UninstallProtocolInterface (
|
|
Private->ExtScsiPassThruHandle,
|
|
&gEfiExtScsiPassThruProtocolGuid,
|
|
&Private->IScsiExtScsiPassThru
|
|
);
|
|
}
|
|
|
|
gBS->CloseEvent (Private->ExitBootServiceEvent);
|
|
|
|
gBS->FreePool (Private);
|
|
}
|
|
|
|
/**
|
|
|
|
Get the various configuration data of this iSCSI instance.
|
|
|
|
@param Private[in] The iSCSI driver data.
|
|
|
|
@retval EFI_SUCCESS The configuration of this instance is got.
|
|
|
|
@retval EFI_NOT_FOUND This iSCSI instance is not configured yet.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
IScsiGetConfigData (
|
|
IN ISCSI_DRIVER_DATA *Private
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
ISCSI_SESSION *Session;
|
|
UINTN BufferSize;
|
|
EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
|
|
EFI_SIMPLE_NETWORK_MODE *Mode;
|
|
CHAR16 MacString[65];
|
|
|
|
//
|
|
// get the iSCSI Initiator Name
|
|
//
|
|
Session = &Private->Session;
|
|
Session->InitiatorNameLength = ISCSI_NAME_MAX_SIZE;
|
|
Status = gIScsiInitiatorName.Get (
|
|
&gIScsiInitiatorName,
|
|
&Session->InitiatorNameLength,
|
|
Session->InitiatorName
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = gBS->HandleProtocol (
|
|
Private->Controller,
|
|
&gEfiSimpleNetworkProtocolGuid,
|
|
(VOID **)&Snp
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Mode = Snp->Mode;
|
|
|
|
//
|
|
// Get the mac string, it's the name of various variable
|
|
//
|
|
IScsiMacAddrToStr (&Mode->PermanentAddress, Mode->HwAddressSize, MacString);
|
|
|
|
//
|
|
// Get the normal configuration.
|
|
//
|
|
BufferSize = sizeof (Session->ConfigData.NvData);
|
|
Status = gRT->GetVariable (
|
|
MacString,
|
|
&gEfiIScsiInitiatorNameProtocolGuid,
|
|
NULL,
|
|
&BufferSize,
|
|
&Session->ConfigData.NvData
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
if (!Session->ConfigData.NvData.Enabled) {
|
|
return EFI_ABORTED;
|
|
}
|
|
//
|
|
// Get the CHAP Auth information.
|
|
//
|
|
BufferSize = sizeof (Session->AuthData.AuthConfig);
|
|
Status = gRT->GetVariable (
|
|
MacString,
|
|
&mIScsiCHAPAuthInfoGuid,
|
|
NULL,
|
|
&BufferSize,
|
|
&Session->AuthData.AuthConfig
|
|
);
|
|
|
|
if (!EFI_ERROR (Status) && Session->ConfigData.NvData.InitiatorInfoFromDhcp) {
|
|
//
|
|
// Start dhcp.
|
|
//
|
|
Status = IScsiDoDhcp (Private->Image, Private->Controller, &Session->ConfigData);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Get the device path of the iSCSI tcp connection and update it.
|
|
|
|
@param Private[in] The iSCSI driver data.
|
|
|
|
@retval The updated device path.
|
|
|
|
**/
|
|
EFI_DEVICE_PATH_PROTOCOL *
|
|
IScsiGetTcpConnDevicePath (
|
|
IN ISCSI_DRIVER_DATA *Private
|
|
)
|
|
{
|
|
ISCSI_SESSION *Session;
|
|
ISCSI_CONNECTION *Conn;
|
|
TCP4_IO *Tcp4Io;
|
|
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
|
|
EFI_STATUS Status;
|
|
EFI_DEV_PATH *DPathNode;
|
|
|
|
Session = &Private->Session;
|
|
if (Session->State != SESSION_STATE_LOGGED_IN) {
|
|
return NULL;
|
|
}
|
|
|
|
Conn = NET_LIST_USER_STRUCT_S (
|
|
Session->Conns.ForwardLink,
|
|
ISCSI_CONNECTION,
|
|
Link,
|
|
ISCSI_CONNECTION_SIGNATURE
|
|
);
|
|
Tcp4Io = &Conn->Tcp4Io;
|
|
|
|
Status = gBS->HandleProtocol (
|
|
Tcp4Io->Handle,
|
|
&gEfiDevicePathProtocolGuid,
|
|
(VOID **)&DevicePath
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return NULL;
|
|
}
|
|
//
|
|
// Duplicate it.
|
|
//
|
|
DevicePath = DuplicateDevicePath (DevicePath);
|
|
|
|
DPathNode = (EFI_DEV_PATH *) DevicePath;
|
|
|
|
while (!IsDevicePathEnd (&DPathNode->DevPath)) {
|
|
if ((DevicePathType (&DPathNode->DevPath) == MESSAGING_DEVICE_PATH) &&
|
|
(DevicePathSubType (&DPathNode->DevPath) == MSG_IPv4_DP)
|
|
) {
|
|
|
|
DPathNode->Ipv4.LocalPort = 0;
|
|
DPathNode->Ipv4.StaticIpAddress = (BOOLEAN) (!Session->ConfigData.NvData.InitiatorInfoFromDhcp);
|
|
break;
|
|
}
|
|
|
|
DPathNode = (EFI_DEV_PATH *) NextDevicePathNode (&DPathNode->DevPath);
|
|
}
|
|
|
|
return DevicePath;
|
|
}
|
|
|
|
/**
|
|
Abort the session when the transition from BS to RT is initiated.
|
|
|
|
@param Event[in] The event signaled.
|
|
|
|
@param Context[in] The iSCSI driver data.
|
|
|
|
@retval None.
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
IScsiOnExitBootService (
|
|
IN EFI_EVENT Event,
|
|
IN VOID *Context
|
|
)
|
|
{
|
|
ISCSI_DRIVER_DATA *Private;
|
|
|
|
Private = (ISCSI_DRIVER_DATA *) Context;
|
|
gBS->CloseEvent (Private->ExitBootServiceEvent);
|
|
|
|
IScsiSessionAbort (&Private->Session);
|
|
}
|