fix test

internal/host/host.go

@@ -7,14 +7,7 @@ import (
 
 func isValidIP(addr string) bool {
 	ip := net.ParseIP(addr)
-	if ip4 := ip.To4(); ip4 != nil {
-		return !ip4.IsLoopback()
-	}
-	// Following RFC 4193, Section 3. Private Address Space which says:
-	//   The Internet Assigned Numbers Authority (IANA) has reserved the
-	//   following block of the IPv6 address space for local internets:
-	//     FC00::  -  FDFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF (FC00::/7 prefix)
-	return len(ip) == net.IPv6len && ip[0]&0xfe == 0xfc
+	return ip.IsGlobalUnicast() && !ip.IsInterfaceLocalMulticast()
 }
 
 // Port return a real port.

internal/host/host_test.go

@@ -5,36 +5,40 @@ import (
 	"testing"
 )
 
-func TestPrivateIP(t *testing.T) {
+func TestValidIP(t *testing.T) {
 	tests := []struct {
 		addr   string
 		expect bool
 	}{
+		{"127.0.0.1", false},
+		{"255.255.255.255", false},
+		{"0.0.0.0", false},
+		{"localhost", false},
 		{"10.1.0.1", true},
 		{"172.16.0.1", true},
 		{"192.168.1.1", true},
-		{"8.8.8.8", false},
-		{"1.1.1.1", false},
-		{"9.255.255.255", false},
+		{"8.8.8.8", true},
+		{"1.1.1.1", true},
+		{"9.255.255.255", true},
 		{"10.0.0.0", true},
 		{"10.255.255.255", true},
-		{"11.0.0.0", false},
-		{"172.15.255.255", false},
+		{"11.0.0.0", true},
+		{"172.15.255.255", true},
 		{"172.16.0.0", true},
 		{"172.16.255.255", true},
 		{"172.23.18.255", true},
 		{"172.31.255.255", true},
 		{"172.31.0.0", true},
-		{"172.32.0.0", false},
-		{"192.167.255.255", false},
+		{"172.32.0.0", true},
+		{"192.167.255.255", true},
 		{"192.168.0.0", true},
 		{"192.168.255.255", true},
-		{"192.169.0.0", false},
-		{"fbff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", false},
+		{"192.169.0.0", true},
+		{"fbff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", true},
 		{"fc00::", true},
 		{"fcff:1200:0:44::", true},
 		{"fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff", true},
-		{"fe00::", false},
+		{"fe00::", true},
 	}
 	for _, test := range tests {
 		t.Run(test.addr, func(t *testing.T) {