add public IPv4/6 runtime options and detect functions

server/cmd/main.go

@@ -32,6 +32,8 @@ type args struct {
 	DontKill    bool   `arg:"-k" help:"don't kill server on signal"`
 	UI          bool   `arg:"-u" help:"open torrserver page in browser"`
 	TorrentsDir string `arg:"-t" help:"autoload torrents from dir"`
+	IPv4        string `arg:"-4" help:"set public IPv4 addr"`
+	IPv6        string `arg:"-6" help:"set public IPv6 addr"`
 }
 
 func (args) Version() string {
@@ -72,6 +74,14 @@ func main() {
 		}()
 	}
 
+	if params.IPv4 != "" {
+		settings.PubIPv4 = params.IPv4
+	}
+
+	if params.IPv6 != "" {
+		settings.PubIPv6 = params.IPv6
+	}
+
 	if params.TorrentsDir != "" {
 		go watchTDir(params.TorrentsDir)
 	}