2.3 LinkInfo
The LinkInfo structure specifies information necessary to resolve a link target if it is not found in its original location. This includes information about the volume that the target was stored on, the mapped drive letter, and a Universal Naming Convention (UNC) form of the path if one existed when the link was created. For more details about UNC paths, see [MS-DFSNM] section 2.2.1.4.
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LinkInfoSize |
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LinkInfoHeaderSize |
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LinkInfoFlags |
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VolumeIDOffset |
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LocalBasePathOffset |
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CommonNetworkRelativeLinkOffset |
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CommonPathSuffixOffset |
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LocalBasePathOffsetUnicode (optional) |
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CommonPathSuffixOffsetUnicode (optional) |
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VolumeID (variable) |
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LocalBasePath (variable) |
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CommonNetworkRelativeLink (variable) |
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CommonPathSuffix (variable) |
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LocalBasePathUnicode (variable) |
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CommonPathSuffixUnicode (variable) |
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LinkInfoSize (4 bytes): A 32-bit, unsigned integer that specifies the size, in bytes, of the LinkInfo structure. All offsets specified in this structure MUST be less than this value, and all strings contained in this structure MUST fit within the extent defined by this size.
LinkInfoHeaderSize (4 bytes): A 32-bit, unsigned integer that specifies the size, in bytes, of the LinkInfo header section, which is composed of the LinkInfoSize, LinkInfoHeaderSize, LinkInfoFlags, VolumeIDOffset, LocalBasePathOffset, CommonNetworkRelativeLinkOffset, CommonPathSuffixOffset fields, and, if included, the LocalBasePathOffsetUnicode and CommonPathSuffixOffsetUnicode fields.<1>
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Value
Meaning
0x0000001C
Offsets to the optional fields are not specified.
0x00000024 ≤ value
Offsets to the optional fields are specified.
LinkInfoFlags (4 bytes): Flags that specify whether the VolumeID, LocalBasePath, LocalBasePathUnicode, and CommonNetworkRelativeLink fields are present in this structure.
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0
1
2
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4
5
6
7
8
91
0
1
2
3
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5
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8
92
0
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93
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1A
B
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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Where the bits are defined as:
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Value
Description
A
VolumeIDAndLocalBasePath
If set, the VolumeID and LocalBasePath fields are present, and their locations are specified by the values of the VolumeIDOffset and LocalBasePathOffset fields, respectively. If the value of the LinkInfoHeaderSize field is greater than or equal to 0x00000024, the LocalBasePathUnicode field is present, and its location is specified by the value of the LocalBasePathOffsetUnicode field.
If not set, the VolumeID, LocalBasePath, and LocalBasePathUnicode fields are not present, and the values of the VolumeIDOffset and LocalBasePathOffset fields are zero. If the value of the LinkInfoHeaderSize field is greater than or equal to 0x00000024, the value of the LocalBasePathOffsetUnicode field is zero.
B
CommonNetworkRelativeLinkAndPathSuffix
If set, the CommonNetworkRelativeLink field is present, and its location is specified by the value of the CommonNetworkRelativeLinkOffset field.
If not set, the CommonNetworkRelativeLink field is not present, and the value of the CommonNetworkRelativeLinkOffset field is zero.
VolumeIDOffset (4 bytes): A 32-bit, unsigned integer that specifies the location of the VolumeID field. If the VolumeIDAndLocalBasePath flag is set, this value is an offset, in bytes, from the start of the LinkInfo structure; otherwise, this value MUST be zero.
LocalBasePathOffset (4 bytes): A 32-bit, unsigned integer that specifies the location of the LocalBasePath field. If the VolumeIDAndLocalBasePath flag is set, this value is an offset, in bytes, from the start of the LinkInfo structure; otherwise, this value MUST be zero.
CommonNetworkRelativeLinkOffset (4 bytes): A 32-bit, unsigned integer that specifies the location of the CommonNetworkRelativeLink field. If the CommonNetworkRelativeLinkAndPathSuffix flag is set, this value is an offset, in bytes, from the start of the LinkInfo structure; otherwise, this value MUST be zero.
CommonPathSuffixOffset (4 bytes): A 32-bit, unsigned integer that specifies the location of the CommonPathSuffix field. This value is an offset, in bytes, from the start of the LinkInfo structure.
LocalBasePathOffsetUnicode (4 bytes): An optional, 32-bit, unsigned integer that specifies the location of the LocalBasePathUnicode field. If the VolumeIDAndLocalBasePath flag is set, this value is an offset, in bytes, from the start of the LinkInfo structure; otherwise, this value MUST be zero. This field can be present only if the value of the LinkInfoHeaderSize field is greater than or equal to 0x00000024.
CommonPathSuffixOffsetUnicode (4 bytes): An optional, 32-bit, unsigned integer that specifies the location of the CommonPathSuffixUnicode field. This value is an offset, in bytes, from the start of the LinkInfo structure. This field can be present only if the value of the LinkInfoHeaderSize field is greater than or equal to 0x00000024.
VolumeID (variable): An optional VolumeID structure (section 2.3.1) that specifies information about the volume that the link target was on when the link was created. This field is present if the VolumeIDAndLocalBasePath flag is set.
LocalBasePath (variable): An optional, NULL–terminated string, defined by the system default code page, which is used to construct the full path to the link item or link target by appending the string in the CommonPathSuffix field. This field is present if the VolumeIDAndLocalBasePath flag is set.
CommonNetworkRelativeLink (variable): An optional CommonNetworkRelativeLink structure (section 2.3.2) that specifies information about the network location where the link target is stored.
CommonPathSuffix (variable): A NULL–terminated string, defined by the system default code page, which is used to construct the full path to the link item or link target by being appended to the string in the LocalBasePath field.
LocalBasePathUnicode (variable): An optional, NULL–terminated, Unicode string that is used to construct the full path to the link item or link target by appending the string in the CommonPathSuffixUnicode field. This field can be present only if the VolumeIDAndLocalBasePath flag is set and the value of the LinkInfoHeaderSize field is greater than or equal to 0x00000024.
CommonPathSuffixUnicode (variable): An optional, NULL–terminated, Unicode string that is used to construct the full path to the link item or link target by being appended to the string in the LocalBasePathUnicode field. This field can be present only if the value of the LinkInfoHeaderSize field is greater than or equal to 0x00000024.