57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
|
package measurex
|
||
|
|
|
||
|
|
//
|
||
|
|
// Bogon
|
||
|
|
//
|
||
|
|
// This file helps us to decide if an IPAddr is a bogon.
|
||
|
|
//
|
||
|
|
|
||
|
|
// TODO(bassosimone): code in engine/netx should use this file.
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net"
|
||
|
|
|
||
|
|
"github.com/ooni/probe-cli/v3/internal/runtimex"
|
||
|
|
)
|
||
|
|
|
||
|
|
// isBogon returns whether if an IP address is bogon. Passing to this
|
||
|
|
// function a non-IP address causes it to return true.
|
||
|
|
func isBogon(address string) bool {
|
||
|
|
ip := net.ParseIP(address)
|
||
|
|
return ip == nil || isPrivate(ip)
|
||
|
|
}
|
||
|
|
|
||
|
|
var privateIPBlocks []*net.IPNet
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
for _, cidr := range []string{
|
||
|
|
"0.0.0.0/8", // "This" network (however, Linux...)
|
||
|
|
"10.0.0.0/8", // RFC1918
|
||
|
|
"100.64.0.0/10", // Carrier grade NAT
|
||
|
|
"127.0.0.0/8", // IPv4 loopback
|
||
|
|
"169.254.0.0/16", // RFC3927 link-local
|
||
|
|
"172.16.0.0/12", // RFC1918
|
||
|
|
"192.168.0.0/16", // RFC1918
|
||
|
|
"224.0.0.0/4", // Multicast
|
||
|
|
"::1/128", // IPv6 loopback
|
||
|
|
"fe80::/10", // IPv6 link-local
|
||
|
|
"fc00::/7", // IPv6 unique local addr
|
||
|
|
} {
|
||
|
|
_, block, err := net.ParseCIDR(cidr)
|
||
|
|
runtimex.PanicOnError(err, "net.ParseCIDR failed")
|
||
|
|
privateIPBlocks = append(privateIPBlocks, block)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func isPrivate(ip net.IP) bool {
|
||
|
|
if ip.IsLoopback() || ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
for _, block := range privateIPBlocks {
|
||
|
|
if block.Contains(ip) {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|