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[FREELDR] PXE: support backward seeking

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svn path=/trunk/; revision=66035
This commit is contained in:
Hervé Poussineau 2015-01-13 20:08:23 +00:00
parent cf89d4fdea
commit f5ab68a2c6
1 changed files with 7 additions and 2 deletions
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9
reactos/boot/freeldr/freeldr/fs/pxe.c
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@ -263,8 +263,13 @@ static ARC_STATUS PxeSeek(ULONG FileId, LARGE_INTEGER* Position, SEEKMODE SeekMo
return EINVAL;
if (!_CachedFile && Position->LowPart < _FilePosition)
// We don't support backward seek without caching
return EINVAL;
{
// Close and reopen the file to go to position 0
if (PxeClose(FileId) != ESUCCESS)
return EIO;
if (PxeOpen(_OpenFileName, OpenReadOnly, &FileId) != ESUCCESS)
return EIO;
}
RtlZeroMemory(&readData, sizeof(readData));
readData.Buffer.segment = ((UINT32)_Packet & 0xf0000) / 16;