HCAP-User-Name is a VSA used to indicate user identity information received over a
HCAP interface by a RADIUS client.
The fields of HCAP-User-Name MUST be set as follows:
Vendor-Type: An 8-bit unsigned integer that MUST be set to 0x3C.
Vendor-Length: An 8-bit unsigned integer that MUST be set to the length of the
Attribute-Specific Value field plus 2. Its value MUST be at least 3.
Attribute-Specific Value: An octet string that contains characters from Windows ANSI code page (for more
information, see ) and MUST specify the name for the HCAP user (as specified in ).