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path: root/src/pkg/net/dial_test.go
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Diffstat (limited to 'src/pkg/net/dial_test.go')
-rw-r--r--src/pkg/net/dial_test.go536
1 files changed, 0 insertions, 536 deletions
diff --git a/src/pkg/net/dial_test.go b/src/pkg/net/dial_test.go
deleted file mode 100644
index f9260fd28..000000000
--- a/src/pkg/net/dial_test.go
+++ /dev/null
@@ -1,536 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package net
-
-import (
- "bytes"
- "flag"
- "fmt"
- "io"
- "os"
- "os/exec"
- "reflect"
- "regexp"
- "runtime"
- "strconv"
- "sync"
- "testing"
- "time"
-)
-
-func newLocalListener(t *testing.T) Listener {
- ln, err := Listen("tcp", "127.0.0.1:0")
- if err != nil {
- ln, err = Listen("tcp6", "[::1]:0")
- }
- if err != nil {
- t.Fatal(err)
- }
- return ln
-}
-
-func TestDialTimeout(t *testing.T) {
- origBacklog := listenerBacklog
- defer func() {
- listenerBacklog = origBacklog
- }()
- listenerBacklog = 1
-
- ln := newLocalListener(t)
- defer ln.Close()
-
- errc := make(chan error)
-
- numConns := listenerBacklog + 100
-
- // TODO(bradfitz): It's hard to test this in a portable
- // way. This is unfortunate, but works for now.
- switch runtime.GOOS {
- case "linux":
- // The kernel will start accepting TCP connections before userspace
- // gets a chance to not accept them, so fire off a bunch to fill up
- // the kernel's backlog. Then we test we get a failure after that.
- for i := 0; i < numConns; i++ {
- go func() {
- _, err := DialTimeout("tcp", ln.Addr().String(), 200*time.Millisecond)
- errc <- err
- }()
- }
- case "darwin", "plan9", "windows":
- // At least OS X 10.7 seems to accept any number of
- // connections, ignoring listen's backlog, so resort
- // to connecting to a hopefully-dead 127/8 address.
- // Same for windows.
- //
- // Use an IANA reserved port (49151) instead of 80, because
- // on our 386 builder, this Dial succeeds, connecting
- // to an IIS web server somewhere. The data center
- // or VM or firewall must be stealing the TCP connection.
- //
- // IANA Service Name and Transport Protocol Port Number Registry
- // <http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml>
- go func() {
- c, err := DialTimeout("tcp", "127.0.71.111:49151", 200*time.Millisecond)
- if err == nil {
- err = fmt.Errorf("unexpected: connected to %s!", c.RemoteAddr())
- c.Close()
- }
- errc <- err
- }()
- default:
- // TODO(bradfitz):
- // OpenBSD may have a reject route to 127/8 except 127.0.0.1/32
- // by default. FreeBSD likely works, but is untested.
- // TODO(rsc):
- // The timeout never happens on Windows. Why? Issue 3016.
- t.Skipf("skipping test on %q; untested.", runtime.GOOS)
- }
-
- connected := 0
- for {
- select {
- case <-time.After(15 * time.Second):
- t.Fatal("too slow")
- case err := <-errc:
- if err == nil {
- connected++
- if connected == numConns {
- t.Fatal("all connections connected; expected some to time out")
- }
- } else {
- terr, ok := err.(timeout)
- if !ok {
- t.Fatalf("got error %q; want error with timeout interface", err)
- }
- if !terr.Timeout() {
- t.Fatalf("got error %q; not a timeout", err)
- }
- // Pass. We saw a timeout error.
- return
- }
- }
- }
-}
-
-func TestSelfConnect(t *testing.T) {
- if runtime.GOOS == "windows" {
- // TODO(brainman): do not know why it hangs.
- t.Skip("skipping known-broken test on windows")
- }
- // Test that Dial does not honor self-connects.
- // See the comment in DialTCP.
-
- // Find a port that would be used as a local address.
- l, err := Listen("tcp", "127.0.0.1:0")
- if err != nil {
- t.Fatal(err)
- }
- c, err := Dial("tcp", l.Addr().String())
- if err != nil {
- t.Fatal(err)
- }
- addr := c.LocalAddr().String()
- c.Close()
- l.Close()
-
- // Try to connect to that address repeatedly.
- n := 100000
- if testing.Short() {
- n = 1000
- }
- switch runtime.GOOS {
- case "darwin", "dragonfly", "freebsd", "netbsd", "openbsd", "plan9", "solaris", "windows":
- // Non-Linux systems take a long time to figure
- // out that there is nothing listening on localhost.
- n = 100
- }
- for i := 0; i < n; i++ {
- c, err := DialTimeout("tcp", addr, time.Millisecond)
- if err == nil {
- c.Close()
- t.Errorf("#%d: Dial %q succeeded", i, addr)
- }
- }
-}
-
-var runErrorTest = flag.Bool("run_error_test", false, "let TestDialError check for dns errors")
-
-type DialErrorTest struct {
- Net string
- Raddr string
- Pattern string
-}
-
-var dialErrorTests = []DialErrorTest{
- {
- "datakit", "mh/astro/r70",
- "dial datakit mh/astro/r70: unknown network datakit",
- },
- {
- "tcp", "127.0.0.1:☺",
- "dial tcp 127.0.0.1:☺: unknown port tcp/☺",
- },
- {
- "tcp", "no-such-name.google.com.:80",
- "dial tcp no-such-name.google.com.:80: lookup no-such-name.google.com.( on .*)?: no (.*)",
- },
- {
- "tcp", "no-such-name.no-such-top-level-domain.:80",
- "dial tcp no-such-name.no-such-top-level-domain.:80: lookup no-such-name.no-such-top-level-domain.( on .*)?: no (.*)",
- },
- {
- "tcp", "no-such-name:80",
- `dial tcp no-such-name:80: lookup no-such-name\.(.*\.)?( on .*)?: no (.*)`,
- },
- {
- "tcp", "mh/astro/r70:http",
- "dial tcp mh/astro/r70:http: lookup mh/astro/r70: invalid domain name",
- },
- {
- "unix", "/etc/file-not-found",
- "dial unix /etc/file-not-found: no such file or directory",
- },
- {
- "unix", "/etc/",
- "dial unix /etc/: (permission denied|socket operation on non-socket|connection refused)",
- },
- {
- "unixpacket", "/etc/file-not-found",
- "dial unixpacket /etc/file-not-found: no such file or directory",
- },
- {
- "unixpacket", "/etc/",
- "dial unixpacket /etc/: (permission denied|socket operation on non-socket|connection refused)",
- },
-}
-
-var duplicateErrorPattern = `dial (.*) dial (.*)`
-
-func TestDialError(t *testing.T) {
- if !*runErrorTest {
- t.Logf("test disabled; use -run_error_test to enable")
- return
- }
- for i, tt := range dialErrorTests {
- c, err := Dial(tt.Net, tt.Raddr)
- if c != nil {
- c.Close()
- }
- if err == nil {
- t.Errorf("#%d: nil error, want match for %#q", i, tt.Pattern)
- continue
- }
- s := err.Error()
- match, _ := regexp.MatchString(tt.Pattern, s)
- if !match {
- t.Errorf("#%d: %q, want match for %#q", i, s, tt.Pattern)
- }
- match, _ = regexp.MatchString(duplicateErrorPattern, s)
- if match {
- t.Errorf("#%d: %q, duplicate error return from Dial", i, s)
- }
- }
-}
-
-var invalidDialAndListenArgTests = []struct {
- net string
- addr string
- err error
-}{
- {"foo", "bar", &OpError{Op: "dial", Net: "foo", Addr: nil, Err: UnknownNetworkError("foo")}},
- {"baz", "", &OpError{Op: "listen", Net: "baz", Addr: nil, Err: UnknownNetworkError("baz")}},
- {"tcp", "", &OpError{Op: "dial", Net: "tcp", Addr: nil, Err: errMissingAddress}},
-}
-
-func TestInvalidDialAndListenArgs(t *testing.T) {
- for _, tt := range invalidDialAndListenArgTests {
- var err error
- switch tt.err.(*OpError).Op {
- case "dial":
- _, err = Dial(tt.net, tt.addr)
- case "listen":
- _, err = Listen(tt.net, tt.addr)
- }
- if !reflect.DeepEqual(tt.err, err) {
- t.Fatalf("got %#v; expected %#v", err, tt.err)
- }
- }
-}
-
-func TestDialTimeoutFDLeak(t *testing.T) {
- if runtime.GOOS != "linux" {
- // TODO(bradfitz): test on other platforms
- t.Skipf("skipping test on %q", runtime.GOOS)
- }
-
- ln := newLocalListener(t)
- defer ln.Close()
-
- type connErr struct {
- conn Conn
- err error
- }
- dials := listenerBacklog + 100
- // used to be listenerBacklog + 5, but was found to be unreliable, issue 4384.
- maxGoodConnect := listenerBacklog + runtime.NumCPU()*10
- resc := make(chan connErr)
- for i := 0; i < dials; i++ {
- go func() {
- conn, err := DialTimeout("tcp", ln.Addr().String(), 500*time.Millisecond)
- resc <- connErr{conn, err}
- }()
- }
-
- var firstErr string
- var ngood int
- var toClose []io.Closer
- for i := 0; i < dials; i++ {
- ce := <-resc
- if ce.err == nil {
- ngood++
- if ngood > maxGoodConnect {
- t.Errorf("%d good connects; expected at most %d", ngood, maxGoodConnect)
- }
- toClose = append(toClose, ce.conn)
- continue
- }
- err := ce.err
- if firstErr == "" {
- firstErr = err.Error()
- } else if err.Error() != firstErr {
- t.Fatalf("inconsistent error messages: first was %q, then later %q", firstErr, err)
- }
- }
- for _, c := range toClose {
- c.Close()
- }
- for i := 0; i < 100; i++ {
- if got := numFD(); got < dials {
- // Test passes.
- return
- }
- time.Sleep(10 * time.Millisecond)
- }
- if got := numFD(); got >= dials {
- t.Errorf("num fds after %d timeouts = %d; want <%d", dials, got, dials)
- }
-}
-
-func numTCP() (ntcp, nopen, nclose int, err error) {
- lsof, err := exec.Command("lsof", "-n", "-p", strconv.Itoa(os.Getpid())).Output()
- if err != nil {
- return 0, 0, 0, err
- }
- ntcp += bytes.Count(lsof, []byte("TCP"))
- for _, state := range []string{"LISTEN", "SYN_SENT", "SYN_RECEIVED", "ESTABLISHED"} {
- nopen += bytes.Count(lsof, []byte(state))
- }
- for _, state := range []string{"CLOSED", "CLOSE_WAIT", "LAST_ACK", "FIN_WAIT_1", "FIN_WAIT_2", "CLOSING", "TIME_WAIT"} {
- nclose += bytes.Count(lsof, []byte(state))
- }
- return ntcp, nopen, nclose, nil
-}
-
-func TestDialMultiFDLeak(t *testing.T) {
- if !supportsIPv4 || !supportsIPv6 {
- t.Skip("neither ipv4 nor ipv6 is supported")
- }
-
- halfDeadServer := func(dss *dualStackServer, ln Listener) {
- for {
- if c, err := ln.Accept(); err != nil {
- return
- } else {
- // It just keeps established
- // connections like a half-dead server
- // does.
- dss.putConn(c)
- }
- }
- }
- dss, err := newDualStackServer([]streamListener{
- {net: "tcp4", addr: "127.0.0.1"},
- {net: "tcp6", addr: "[::1]"},
- })
- if err != nil {
- t.Fatalf("newDualStackServer failed: %v", err)
- }
- defer dss.teardown()
- if err := dss.buildup(halfDeadServer); err != nil {
- t.Fatalf("dualStackServer.buildup failed: %v", err)
- }
-
- _, before, _, err := numTCP()
- if err != nil {
- t.Skipf("skipping test; error finding or running lsof: %v", err)
- }
-
- var wg sync.WaitGroup
- portnum, _, _ := dtoi(dss.port, 0)
- ras := addrList{
- // Losers that will fail to connect, see RFC 6890.
- &TCPAddr{IP: IPv4(198, 18, 0, 254), Port: portnum},
- &TCPAddr{IP: ParseIP("2001:2::254"), Port: portnum},
-
- // Winner candidates of this race.
- &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: portnum},
- &TCPAddr{IP: IPv6loopback, Port: portnum},
-
- // Losers that will have established connections.
- &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: portnum},
- &TCPAddr{IP: IPv6loopback, Port: portnum},
- }
- const T1 = 10 * time.Millisecond
- const T2 = 2 * T1
- const N = 10
- for i := 0; i < N; i++ {
- wg.Add(1)
- go func() {
- defer wg.Done()
- if c, err := dialMulti("tcp", "fast failover test", nil, ras, time.Now().Add(T1)); err == nil {
- c.Close()
- }
- }()
- }
- wg.Wait()
- time.Sleep(T2)
-
- ntcp, after, nclose, err := numTCP()
- if err != nil {
- t.Skipf("skipping test; error finding or running lsof: %v", err)
- }
- t.Logf("tcp sessions: %v, open sessions: %v, closing sessions: %v", ntcp, after, nclose)
-
- if after != before {
- t.Fatalf("got %v open sessions; expected %v", after, before)
- }
-}
-
-func numFD() int {
- if runtime.GOOS == "linux" {
- f, err := os.Open("/proc/self/fd")
- if err != nil {
- panic(err)
- }
- defer f.Close()
- names, err := f.Readdirnames(0)
- if err != nil {
- panic(err)
- }
- return len(names)
- }
- // All tests using this should be skipped anyway, but:
- panic("numFDs not implemented on " + runtime.GOOS)
-}
-
-func TestDialer(t *testing.T) {
- ln, err := Listen("tcp4", "127.0.0.1:0")
- if err != nil {
- t.Fatalf("Listen failed: %v", err)
- }
- defer ln.Close()
- ch := make(chan error, 1)
- go func() {
- c, err := ln.Accept()
- if err != nil {
- ch <- fmt.Errorf("Accept failed: %v", err)
- return
- }
- defer c.Close()
- ch <- nil
- }()
-
- laddr, err := ResolveTCPAddr("tcp4", "127.0.0.1:0")
- if err != nil {
- t.Fatalf("ResolveTCPAddr failed: %v", err)
- }
- d := &Dialer{LocalAddr: laddr}
- c, err := d.Dial("tcp4", ln.Addr().String())
- if err != nil {
- t.Fatalf("Dial failed: %v", err)
- }
- defer c.Close()
- c.Read(make([]byte, 1))
- err = <-ch
- if err != nil {
- t.Error(err)
- }
-}
-
-func TestDialDualStackLocalhost(t *testing.T) {
- if ips, err := LookupIP("localhost"); err != nil {
- t.Fatalf("LookupIP failed: %v", err)
- } else if len(ips) < 2 || !supportsIPv4 || !supportsIPv6 {
- t.Skip("localhost doesn't have a pair of different address family IP addresses")
- }
-
- touchAndByeServer := func(dss *dualStackServer, ln Listener) {
- for {
- if c, err := ln.Accept(); err != nil {
- return
- } else {
- c.Close()
- }
- }
- }
- dss, err := newDualStackServer([]streamListener{
- {net: "tcp4", addr: "127.0.0.1"},
- {net: "tcp6", addr: "[::1]"},
- })
- if err != nil {
- t.Fatalf("newDualStackServer failed: %v", err)
- }
- defer dss.teardown()
- if err := dss.buildup(touchAndByeServer); err != nil {
- t.Fatalf("dualStackServer.buildup failed: %v", err)
- }
-
- d := &Dialer{DualStack: true}
- for _ = range dss.lns {
- if c, err := d.Dial("tcp", "localhost:"+dss.port); err != nil {
- t.Errorf("Dial failed: %v", err)
- } else {
- if addr := c.LocalAddr().(*TCPAddr); addr.IP.To4() != nil {
- dss.teardownNetwork("tcp4")
- } else if addr.IP.To16() != nil && addr.IP.To4() == nil {
- dss.teardownNetwork("tcp6")
- }
- c.Close()
- }
- }
-}
-
-func TestDialerKeepAlive(t *testing.T) {
- ln := newLocalListener(t)
- defer ln.Close()
- defer func() {
- testHookSetKeepAlive = func() {}
- }()
- go func() {
- for {
- c, err := ln.Accept()
- if err != nil {
- return
- }
- c.Close()
- }
- }()
- for _, keepAlive := range []bool{false, true} {
- got := false
- testHookSetKeepAlive = func() { got = true }
- var d Dialer
- if keepAlive {
- d.KeepAlive = 30 * time.Second
- }
- c, err := d.Dial("tcp", ln.Addr().String())
- if err != nil {
- t.Fatal(err)
- }
- c.Close()
- if got != keepAlive {
- t.Errorf("Dialer.KeepAlive = %v: SetKeepAlive called = %v, want %v", d.KeepAlive, got, !got)
- }
- }
-}
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