util

Documentation

Index

• func IPAdd(ip net.IP, val int64) net.IP
• func IPDiff(ip1, ip2 net.IP) int64

Functions

func IPAdd

func IPAdd(ip net.IP, val int64) net.IP

IPAdd adds `val` to `ip`. If `ip` is IPv4 address, the value returned is IPv4, or nil when over/underflowed. If `ip` is IPv6 address, the value returned is IPv6, or nil when over/underflowed.

func IPDiff

func IPDiff(ip1, ip2 net.IP) int64

IPDiff calculates the numeric difference between two IP addresses. Intuitively, the calculation is done as `ip2 - ip1`. `ip1` and `ip2` must be the same IP version (4 or 6).