cidr.md

CIDR Checker

The cidr checker checks if the value is a valid CIDR notation IP address and prefix length, like 192.0.2.0/24 or 2001:db8::/32, as defined in RFC 4632 and RFC 4291. If the value is not a valid CIDR notation, the checker will return the NOT_CIDR result. Here is an example:

type Network struct {
  Subnet string `checkers:"cidr"`
}

network := &Network{
  Subnet: "192.0.2.0/24",
}

_, valid := checker.Check(network)
if !valid {
  // Send the mistakes back to the user
}

In your custom checkers, you can call the cidr checker function IsCidr to validate the user input. Here is an example:

result := checker.IsCidr("2001:db8::/32")

if result != checker.ResultValid {
  // Send the mistakes back to the user
}