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moby--moby/integration-cli/docker_cli_nat_test.go

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package main
import (
"fmt"
"io/ioutil"
"net"
"strings"
"github.com/docker/docker/integration-cli/checker"
"github.com/docker/docker/integration-cli/cli"
"github.com/go-check/check"
)
func startServerContainer(c *check.C, msg string, port int) string {
name := "server"
cmd := []string{
"run",
"--name",
name,
"-d",
"-p", fmt.Sprintf("%d:%d", port, port),
"busybox",
"sh", "-c", fmt.Sprintf("echo %q | nc -lp %d", msg, port),
}
cli.DockerCmd(c, cmd...)
cli.WaitRun(c, name)
return name
}
func getExternalAddress(c *check.C) net.IP {
iface, err := net.InterfaceByName("eth0")
if err != nil {
c.Skip(fmt.Sprintf("Test not running with `make test`. Interface eth0 not found: %v", err))
}
ifaceAddrs, err := iface.Addrs()
c.Assert(err, check.IsNil)
c.Assert(ifaceAddrs, checker.Not(checker.HasLen), 0)
ifaceIP, _, err := net.ParseCIDR(ifaceAddrs[0].String())
c.Assert(err, check.IsNil)
return ifaceIP
}
func (s *DockerSuite) TestNetworkNat(c *check.C) {
testRequires(c, DaemonIsLinux, SameHostDaemon)
msg := "it works"
startServerContainer(c, msg, 8080)
endpoint := getExternalAddress(c)
conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", endpoint.String(), 8080))
c.Assert(err, check.IsNil)
data, err := ioutil.ReadAll(conn)
conn.Close()
c.Assert(err, check.IsNil)
final := strings.TrimRight(string(data), "\n")
c.Assert(final, checker.Equals, msg)
}
func (s *DockerSuite) TestNetworkLocalhostTCPNat(c *check.C) {
testRequires(c, DaemonIsLinux, SameHostDaemon)
var (
msg = "hi yall"
)
startServerContainer(c, msg, 8081)
conn, err := net.Dial("tcp", "localhost:8081")
c.Assert(err, check.IsNil)
data, err := ioutil.ReadAll(conn)
conn.Close()
c.Assert(err, check.IsNil)
final := strings.TrimRight(string(data), "\n")
c.Assert(final, checker.Equals, msg)
}
func (s *DockerSuite) TestNetworkLoopbackNat(c *check.C) {
testRequires(c, DaemonIsLinux, SameHostDaemon, NotUserNamespace)
msg := "it works"
startServerContainer(c, msg, 8080)
endpoint := getExternalAddress(c)
out, _ := dockerCmd(c, "run", "-t", "--net=container:server", "busybox",
"sh", "-c", fmt.Sprintf("stty raw && nc -w 5 %s 8080", endpoint.String()))
final := strings.TrimRight(string(out), "\n")
c.Assert(final, checker.Equals, msg)
}