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validator.go
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validator.go
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package iputil
import (
"net"
)
// IPValidator is the interface for validating an ip address and version.
type IPValidator interface {
// IsValid returns true when an IP address is determined to be valid.
IsValid(net.IP, IPVersion) bool
}
// PublicNetworkIPValidator validates an ip address which is not contained in the list of known private networks.
type PublicNetworkIPValidator struct {
IPv4PrivateNetworks []net.IPNet
IPv6PrivateNetworks []net.IPNet
}
// IsValid implements the IPValidator interface.
func (v PublicNetworkIPValidator) IsValid(ip net.IP, ver IPVersion) bool {
var privateNetworks []net.IPNet
switch ver {
case IPv4:
privateNetworks = v.IPv4PrivateNetworks
case IPv6:
privateNetworks = v.IPv6PrivateNetworks
default:
return false
}
for _, ipNet := range privateNetworks {
if ipNet.Contains(ip) {
return false
}
}
return true
}
// VersionIPValidator validates an ip address based on the desired ip version.
type VersionIPValidator struct {
Version IPVersion
}
// IsValid implements the IPValidator interface.
func (v VersionIPValidator) IsValid(ip net.IP, ver IPVersion) bool {
return ver == v.Version
}