/usr/share/gocode/src/github.com/docker/libnetwork/portmapper/mapper_test.go is in golang-github-docker-libnetwork-dev 0.8.0-dev.2+git20170202.599.45b4086-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import (
"net"
"strings"
"testing"
"github.com/docker/libnetwork/iptables"
_ "github.com/docker/libnetwork/testutils"
)
func init() {
// override this func to mock out the proxy server
newProxy = newMockProxyCommand
}
func TestSetIptablesChain(t *testing.T) {
pm := New("")
c := &iptables.ChainInfo{
Name: "TEST",
}
if pm.chain != nil {
t.Fatal("chain should be nil at init")
}
pm.SetIptablesChain(c, "lo")
if pm.chain == nil {
t.Fatal("chain should not be nil after set")
}
}
func TestMapTCPPorts(t *testing.T) {
pm := New("")
dstIP1 := net.ParseIP("192.168.0.1")
dstIP2 := net.ParseIP("192.168.0.2")
dstAddr1 := &net.TCPAddr{IP: dstIP1, Port: 80}
dstAddr2 := &net.TCPAddr{IP: dstIP2, Port: 80}
srcAddr1 := &net.TCPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")}
srcAddr2 := &net.TCPAddr{Port: 1080, IP: net.ParseIP("172.16.0.2")}
addrEqual := func(addr1, addr2 net.Addr) bool {
return (addr1.Network() == addr2.Network()) && (addr1.String() == addr2.String())
}
if host, err := pm.Map(srcAddr1, dstIP1, 80, true); err != nil {
t.Fatalf("Failed to allocate port: %s", err)
} else if !addrEqual(dstAddr1, host) {
t.Fatalf("Incorrect mapping result: expected %s:%s, got %s:%s",
dstAddr1.String(), dstAddr1.Network(), host.String(), host.Network())
}
if _, err := pm.Map(srcAddr1, dstIP1, 80, true); err == nil {
t.Fatalf("Port is in use - mapping should have failed")
}
if _, err := pm.Map(srcAddr2, dstIP1, 80, true); err == nil {
t.Fatalf("Port is in use - mapping should have failed")
}
if _, err := pm.Map(srcAddr2, dstIP2, 80, true); err != nil {
t.Fatalf("Failed to allocate port: %s", err)
}
if pm.Unmap(dstAddr1) != nil {
t.Fatalf("Failed to release port")
}
if pm.Unmap(dstAddr2) != nil {
t.Fatalf("Failed to release port")
}
if pm.Unmap(dstAddr2) == nil {
t.Fatalf("Port already released, but no error reported")
}
}
func TestGetUDPKey(t *testing.T) {
addr := &net.UDPAddr{IP: net.ParseIP("192.168.1.5"), Port: 53}
key := getKey(addr)
if expected := "192.168.1.5:53/udp"; key != expected {
t.Fatalf("expected key %s got %s", expected, key)
}
}
func TestGetTCPKey(t *testing.T) {
addr := &net.TCPAddr{IP: net.ParseIP("192.168.1.5"), Port: 80}
key := getKey(addr)
if expected := "192.168.1.5:80/tcp"; key != expected {
t.Fatalf("expected key %s got %s", expected, key)
}
}
func TestGetUDPIPAndPort(t *testing.T) {
addr := &net.UDPAddr{IP: net.ParseIP("192.168.1.5"), Port: 53}
ip, port := getIPAndPort(addr)
if expected := "192.168.1.5"; ip.String() != expected {
t.Fatalf("expected ip %s got %s", expected, ip)
}
if ep := 53; port != ep {
t.Fatalf("expected port %d got %d", ep, port)
}
}
func TestMapUDPPorts(t *testing.T) {
pm := New("")
dstIP1 := net.ParseIP("192.168.0.1")
dstIP2 := net.ParseIP("192.168.0.2")
dstAddr1 := &net.UDPAddr{IP: dstIP1, Port: 80}
dstAddr2 := &net.UDPAddr{IP: dstIP2, Port: 80}
srcAddr1 := &net.UDPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")}
srcAddr2 := &net.UDPAddr{Port: 1080, IP: net.ParseIP("172.16.0.2")}
addrEqual := func(addr1, addr2 net.Addr) bool {
return (addr1.Network() == addr2.Network()) && (addr1.String() == addr2.String())
}
if host, err := pm.Map(srcAddr1, dstIP1, 80, true); err != nil {
t.Fatalf("Failed to allocate port: %s", err)
} else if !addrEqual(dstAddr1, host) {
t.Fatalf("Incorrect mapping result: expected %s:%s, got %s:%s",
dstAddr1.String(), dstAddr1.Network(), host.String(), host.Network())
}
if _, err := pm.Map(srcAddr1, dstIP1, 80, true); err == nil {
t.Fatalf("Port is in use - mapping should have failed")
}
if _, err := pm.Map(srcAddr2, dstIP1, 80, true); err == nil {
t.Fatalf("Port is in use - mapping should have failed")
}
if _, err := pm.Map(srcAddr2, dstIP2, 80, true); err != nil {
t.Fatalf("Failed to allocate port: %s", err)
}
if pm.Unmap(dstAddr1) != nil {
t.Fatalf("Failed to release port")
}
if pm.Unmap(dstAddr2) != nil {
t.Fatalf("Failed to release port")
}
if pm.Unmap(dstAddr2) == nil {
t.Fatalf("Port already released, but no error reported")
}
}
func TestMapAllPortsSingleInterface(t *testing.T) {
pm := New("")
dstIP1 := net.ParseIP("0.0.0.0")
srcAddr1 := &net.TCPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")}
hosts := []net.Addr{}
var host net.Addr
var err error
defer func() {
for _, val := range hosts {
pm.Unmap(val)
}
}()
for i := 0; i < 10; i++ {
start, end := pm.Allocator.Begin, pm.Allocator.End
for i := start; i < end; i++ {
if host, err = pm.Map(srcAddr1, dstIP1, 0, true); err != nil {
t.Fatal(err)
}
hosts = append(hosts, host)
}
if _, err := pm.Map(srcAddr1, dstIP1, start, true); err == nil {
t.Fatalf("Port %d should be bound but is not", start)
}
for _, val := range hosts {
if err := pm.Unmap(val); err != nil {
t.Fatal(err)
}
}
hosts = []net.Addr{}
}
}
func TestMapTCPDummyListen(t *testing.T) {
pm := New("")
dstIP := net.ParseIP("0.0.0.0")
dstAddr := &net.TCPAddr{IP: dstIP, Port: 80}
// no-op for dummy
srcAddr := &net.TCPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")}
addrEqual := func(addr1, addr2 net.Addr) bool {
return (addr1.Network() == addr2.Network()) && (addr1.String() == addr2.String())
}
if host, err := pm.Map(srcAddr, dstIP, 80, false); err != nil {
t.Fatalf("Failed to allocate port: %s", err)
} else if !addrEqual(dstAddr, host) {
t.Fatalf("Incorrect mapping result: expected %s:%s, got %s:%s",
dstAddr.String(), dstAddr.Network(), host.String(), host.Network())
}
if _, err := net.Listen("tcp", "0.0.0.0:80"); err == nil {
t.Fatal("Listen on mapped port without proxy should fail")
} else {
if !strings.Contains(err.Error(), "address already in use") {
t.Fatalf("Error should be about address already in use, got %v", err)
}
}
if _, err := net.Listen("tcp", "0.0.0.0:81"); err != nil {
t.Fatal(err)
}
if host, err := pm.Map(srcAddr, dstIP, 81, false); err == nil {
t.Fatalf("Bound port shouldn't be allocated, but it was on: %v", host)
} else {
if !strings.Contains(err.Error(), "address already in use") {
t.Fatalf("Error should be about address already in use, got %v", err)
}
}
}
func TestMapUDPDummyListen(t *testing.T) {
pm := New("")
dstIP := net.ParseIP("0.0.0.0")
dstAddr := &net.UDPAddr{IP: dstIP, Port: 80}
// no-op for dummy
srcAddr := &net.UDPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")}
addrEqual := func(addr1, addr2 net.Addr) bool {
return (addr1.Network() == addr2.Network()) && (addr1.String() == addr2.String())
}
if host, err := pm.Map(srcAddr, dstIP, 80, false); err != nil {
t.Fatalf("Failed to allocate port: %s", err)
} else if !addrEqual(dstAddr, host) {
t.Fatalf("Incorrect mapping result: expected %s:%s, got %s:%s",
dstAddr.String(), dstAddr.Network(), host.String(), host.Network())
}
if _, err := net.ListenUDP("udp", &net.UDPAddr{IP: dstIP, Port: 80}); err == nil {
t.Fatal("Listen on mapped port without proxy should fail")
} else {
if !strings.Contains(err.Error(), "address already in use") {
t.Fatalf("Error should be about address already in use, got %v", err)
}
}
if _, err := net.ListenUDP("udp", &net.UDPAddr{IP: dstIP, Port: 81}); err != nil {
t.Fatal(err)
}
if host, err := pm.Map(srcAddr, dstIP, 81, false); err == nil {
t.Fatalf("Bound port shouldn't be allocated, but it was on: %v", host)
} else {
if !strings.Contains(err.Error(), "address already in use") {
t.Fatalf("Error should be about address already in use, got %v", err)
}
}
}
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