Unable to find the definition of option_code_hash_lookup( ) function in ISC-DHCP code

[Aleem AKHTAR]

Hi,

I want to add some options in ISC-DHCPv6 client code but I am unable to find
the definition of option_code_hash_lookup( . could someone help me where to
find this definition and how to add my option in ISC-DHCPv6 client code.

Thanks,
Aleem