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net.go
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/
net.go
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package models
import (
"net"
"github.com/pkg/errors"
)
func parseIP(ipString string) (net.IP, error) {
ip := net.ParseIP(ipString)
if ip == nil {
return nil, errors.Errorf("couldn't parse IP address: " + ipString)
}
return ip, nil
}
func isIPInSubnet(subnet *net.IPNet, ipString string) error {
ip, err := parseIP(ipString)
if err != nil {
return err
}
if !subnet.Contains(ip) {
return errors.Errorf("address is out of CIDR: " + subnet.String())
}
return nil
}
// CheckSubnetsOverlap checks if subnets overlaps.
func CheckSubnetsOverlap(cidr1, cidr2 string) (bool, error) {
ip1, sub1, err := net.ParseCIDR(cidr1)
if err != nil {
return false, err
}
ip2, sub2, err := net.ParseCIDR(cidr2)
if err != nil {
return false, err
}
if sub1.Contains(ip2) || sub2.Contains(ip1) {
return true, nil
}
return false, nil
}