| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package test |
| |
| import ( |
| "fmt" |
| "net" |
| ) |
| |
| func GetFreePort() (int, error) { |
| port, err := FindFreePort("") |
| return int(port), err |
| } |
| |
| func FindFreePort(ip string) (uint32, error) { |
| ln, err := net.Listen("tcp", fmt.Sprintf("%s:0", ip)) |
| if err != nil { |
| return 0, err |
| } |
| if err := ln.Close(); err != nil { |
| return 0, err |
| } |
| return uint32(ln.Addr().(*net.TCPAddr).Port), nil |
| } |