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