3.2.7.3 DhcpExtractVendorSpecificOption
The higher-level protocol implementations use this method to extract the vendor-specific options in the DHCPv4 message packets received through Receiving a DHCPDISCOVER Message (section 3.2.5.1), Receiving a DHCPREQUEST Message (section 3.2.5.2), and Receiving a DHCPINFORM Message (section 3.2.5.4). When the cumulative size of all the vendor-specific options being sent in a message exceeds 255 bytes, the Microsoft Encoding Long Options Packet (section 2.2.9) MUST be used.