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ip.go
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ip.go
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/*
=======================
boggart
=======================
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses/.
@Repository: https://github.com/edoardottt/boggart
@Author: edoardottt, https://www.edoardoottavianelli.it
@License: https://github.com/edoardottt/boggart/blob/main/LICENSE
*/
package net
import (
"net"
)
// ValidIPAddress returns true if the IP taken as input
// is a valid IP address.
func ValidIPAddress(ip string) bool {
return net.ParseIP(ip) != nil
}
// PrivateIP returns true if the IP taken as input
// is a private IP address.
func PrivateIP(ip string) (bool, error) {
if !ValidIPAddress(ip) {
return false, ErrInvalidIP
}
IP := net.ParseIP(ip)
private := false
_, private24BitBlock, _ := net.ParseCIDR("10.0.0.0/8")
_, private20BitBlock, _ := net.ParseCIDR("172.16.0.0/12")
_, private16BitBlock, _ := net.ParseCIDR("192.168.0.0/16")
private = private24BitBlock.Contains(IP) || private20BitBlock.Contains(IP) || private16BitBlock.Contains(IP)
return private, nil
}