71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
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// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package main runs iptables tests from within a docker container.
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package main
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import (
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"flag"
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"fmt"
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"log"
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"net"
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"gvisor.dev/gvisor/test/iptables"
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)
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var name = flag.String("name", "", "name of the test to run")
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func main() {
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flag.Parse()
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// Find out which test we're running.
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test, ok := iptables.Tests[*name]
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if !ok {
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log.Fatalf("No test found named %q", *name)
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}
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log.Printf("Running test %q", *name)
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// Get the IP of the local process.
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ip, err := getIP()
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if err != nil {
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log.Fatal(err)
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}
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// Run the test.
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if err := test.ContainerAction(ip); err != nil {
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log.Fatalf("Failed running test %q: %v", *name, err)
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}
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}
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// getIP listens for a connection from the local process and returns the source
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// IP of that connection.
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func getIP() (net.IP, error) {
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localAddr := net.TCPAddr{
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Port: iptables.IPExchangePort,
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}
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listener, err := net.ListenTCP("tcp4", &localAddr)
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if err != nil {
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return net.IP{}, fmt.Errorf("failed listening for IP: %v", err)
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}
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defer listener.Close()
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conn, err := listener.AcceptTCP()
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if err != nil {
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return net.IP{}, fmt.Errorf("failed accepting IP: %v", err)
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}
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defer conn.Close()
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log.Printf("Connected to %v", conn.RemoteAddr())
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return conn.RemoteAddr().(*net.TCPAddr).IP, nil
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}
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