Bitmask

Transform IP addresses using bitwise binary operations. Useful for changing subnets (especially for IPv6 addresses).

Note

Bitmasks will become more useful once Shared functions are implemented, thereby allowing for reusable, healthcheck-based address transformation (e.g. IPv6 Prefix Failover).

Parameters

Operation	The bitwise binary operation to perform (and or or)
Masks	A function that returns the binary masks to apply
Inner	A function that returns IP addresses that the binary masks will be applied to

Return Value

IP addresses (results from Inner that have been transformed by the masks in Masks)

Examples

Assuming a constant Inner function with an IP address 2001:db8:cafe::dead:beef

And

An and bitmask can effectively remove bits from an IP address:

Given a mask of ::ffff:ffff and an inner address of 2001:db8:cafe::dead:beef, returns ::dead:beef.

Or

An or bitmask can effectively add bits to an IP address:

Given a mask of 2001:db8:cafe:: and an inner address of ::dead:beef, returns 2001:db8:cafe::dead:beef.