56 lines
972 B
Go
56 lines
972 B
Go
package oracle
|
|
|
|
import (
|
|
"errors"
|
|
"net"
|
|
"net/url"
|
|
)
|
|
|
|
// reservedCIDRs is a list of ip addresses for private networks.
|
|
// https://tools.ietf.org/html/rfc6890
|
|
var reservedCIDRs = []string{
|
|
// IPv4
|
|
"10.0.0.0/8",
|
|
"100.64.0.0/10",
|
|
"172.16.0.0/12",
|
|
"192.0.0.0/24",
|
|
"192.168.0.0/16",
|
|
"198.18.0.0/15",
|
|
// IPv6
|
|
"fc00::/7",
|
|
}
|
|
|
|
var privateNets = make([]net.IPNet, 0, len(reservedCIDRs))
|
|
|
|
func init() {
|
|
for i := range reservedCIDRs {
|
|
_, ipNet, err := net.ParseCIDR(reservedCIDRs[i])
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
privateNets = append(privateNets, *ipNet)
|
|
}
|
|
}
|
|
|
|
func defaultURIValidator(u *url.URL) error {
|
|
ip, err := net.ResolveIPAddr("ip", u.Hostname())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if isReserved(ip.IP) {
|
|
return errors.New("IP is not global unicast")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func isReserved(ip net.IP) bool {
|
|
if !ip.IsGlobalUnicast() {
|
|
return true
|
|
}
|
|
for i := range privateNets {
|
|
if privateNets[i].Contains(ip) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|