Adding upstream version 1.16.10.upstream/1.16.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 622 insertions, 0 deletions

diff --git a/src/net/net_windows_test.go b/src/net/net_windows_test.go
new file mode 100644
index 0000000..a000095
--- /dev/null
+++ b/src/net/net_windows_test.go
@@ -0,0 +1,622 @@
+// Copyright 2014 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 (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"regexp"
+	"sort"
+	"strings"
+	"syscall"
+	"testing"
+	"time"
+)
+
+func toErrno(err error) (syscall.Errno, bool) {
+	operr, ok := err.(*OpError)
+	if !ok {
+		return 0, false
+	}
+	syserr, ok := operr.Err.(*os.SyscallError)
+	if !ok {
+		return 0, false
+	}
+	errno, ok := syserr.Err.(syscall.Errno)
+	if !ok {
+		return 0, false
+	}
+	return errno, true
+}
+
+// TestAcceptIgnoreSomeErrors tests that windows TCPListener.AcceptTCP
+// handles broken connections. It verifies that broken connections do
+// not affect future connections.
+func TestAcceptIgnoreSomeErrors(t *testing.T) {
+	recv := func(ln Listener, ignoreSomeReadErrors bool) (string, error) {
+		c, err := ln.Accept()
+		if err != nil {
+			// Display windows errno in error message.
+			errno, ok := toErrno(err)
+			if !ok {
+				return "", err
+			}
+			return "", fmt.Errorf("%v (windows errno=%d)", err, errno)
+		}
+		defer c.Close()
+
+		b := make([]byte, 100)
+		n, err := c.Read(b)
+		if err == nil || err == io.EOF {
+			return string(b[:n]), nil
+		}
+		errno, ok := toErrno(err)
+		if ok && ignoreSomeReadErrors && (errno == syscall.ERROR_NETNAME_DELETED || errno == syscall.WSAECONNRESET) {
+			return "", nil
+		}
+		return "", err
+	}
+
+	send := func(addr string, data string) error {
+		c, err := Dial("tcp", addr)
+		if err != nil {
+			return err
+		}
+		defer c.Close()
+
+		b := []byte(data)
+		n, err := c.Write(b)
+		if err != nil {
+			return err
+		}
+		if n != len(b) {
+			return fmt.Errorf(`Only %d chars of string "%s" sent`, n, data)
+		}
+		return nil
+	}
+
+	if envaddr := os.Getenv("GOTEST_DIAL_ADDR"); envaddr != "" {
+		// In child process.
+		c, err := Dial("tcp", envaddr)
+		if err != nil {
+			t.Fatal(err)
+		}
+		fmt.Printf("sleeping\n")
+		time.Sleep(time.Minute) // process will be killed here
+		c.Close()
+	}
+
+	ln, err := Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ln.Close()
+
+	// Start child process that connects to our listener.
+	cmd := exec.Command(os.Args[0], "-test.run=TestAcceptIgnoreSomeErrors")
+	cmd.Env = append(os.Environ(), "GOTEST_DIAL_ADDR="+ln.Addr().String())
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		t.Fatalf("cmd.StdoutPipe failed: %v", err)
+	}
+	err = cmd.Start()
+	if err != nil {
+		t.Fatalf("cmd.Start failed: %v\n", err)
+	}
+	outReader := bufio.NewReader(stdout)
+	for {
+		s, err := outReader.ReadString('\n')
+		if err != nil {
+			t.Fatalf("reading stdout failed: %v", err)
+		}
+		if s == "sleeping\n" {
+			break
+		}
+	}
+	defer cmd.Wait() // ignore error - we know it is getting killed
+
+	const alittle = 100 * time.Millisecond
+	time.Sleep(alittle)
+	cmd.Process.Kill() // the only way to trigger the errors
+	time.Sleep(alittle)
+
+	// Send second connection data (with delay in a separate goroutine).
+	result := make(chan error)
+	go func() {
+		time.Sleep(alittle)
+		err := send(ln.Addr().String(), "abc")
+		if err != nil {
+			result <- err
+		}
+		result <- nil
+	}()
+	defer func() {
+		err := <-result
+		if err != nil {
+			t.Fatalf("send failed: %v", err)
+		}
+	}()
+
+	// Receive first or second connection.
+	s, err := recv(ln, true)
+	if err != nil {
+		t.Fatalf("recv failed: %v", err)
+	}
+	switch s {
+	case "":
+		// First connection data is received, let's get second connection data.
+	case "abc":
+		// First connection is lost forever, but that is ok.
+		return
+	default:
+		t.Fatalf(`"%s" received from recv, but "" or "abc" expected`, s)
+	}
+
+	// Get second connection data.
+	s, err = recv(ln, false)
+	if err != nil {
+		t.Fatalf("recv failed: %v", err)
+	}
+	if s != "abc" {
+		t.Fatalf(`"%s" received from recv, but "abc" expected`, s)
+	}
+}
+
+func runCmd(args ...string) ([]byte, error) {
+	removeUTF8BOM := func(b []byte) []byte {
+		if len(b) >= 3 && b[0] == 0xEF && b[1] == 0xBB && b[2] == 0xBF {
+			return b[3:]
+		}
+		return b
+	}
+	f, err := os.CreateTemp("", "netcmd")
+	if err != nil {
+		return nil, err
+	}
+	f.Close()
+	defer os.Remove(f.Name())
+	cmd := fmt.Sprintf(`%s | Out-File "%s" -encoding UTF8`, strings.Join(args, " "), f.Name())
+	out, err := exec.Command("powershell", "-Command", cmd).CombinedOutput()
+	if err != nil {
+		if len(out) != 0 {
+			return nil, fmt.Errorf("%s failed: %v: %q", args[0], err, string(removeUTF8BOM(out)))
+		}
+		var err2 error
+		out, err2 = os.ReadFile(f.Name())
+		if err2 != nil {
+			return nil, err2
+		}
+		if len(out) != 0 {
+			return nil, fmt.Errorf("%s failed: %v: %q", args[0], err, string(removeUTF8BOM(out)))
+		}
+		return nil, fmt.Errorf("%s failed: %v", args[0], err)
+	}
+	out, err = os.ReadFile(f.Name())
+	if err != nil {
+		return nil, err
+	}
+	return removeUTF8BOM(out), nil
+}
+
+func netshSpeaksEnglish(t *testing.T) bool {
+	out, err := runCmd("netsh", "help")
+	if err != nil {
+		t.Fatal(err)
+	}
+	return bytes.Contains(out, []byte("The following commands are available:"))
+}
+
+func netshInterfaceIPShowInterface(ipver string, ifaces map[string]bool) error {
+	out, err := runCmd("netsh", "interface", ipver, "show", "interface", "level=verbose")
+	if err != nil {
+		return err
+	}
+	// interface information is listed like:
+	//
+	//Interface Local Area Connection Parameters
+	//----------------------------------------------
+	//IfLuid                             : ethernet_6
+	//IfIndex                            : 11
+	//State                              : connected
+	//Metric                             : 10
+	//...
+	var name string
+	lines := bytes.Split(out, []byte{'\r', '\n'})
+	for _, line := range lines {
+		if bytes.HasPrefix(line, []byte("Interface ")) && bytes.HasSuffix(line, []byte(" Parameters")) {
+			f := line[len("Interface "):]
+			f = f[:len(f)-len(" Parameters")]
+			name = string(f)
+			continue
+		}
+		var isup bool
+		switch string(line) {
+		case "State                              : connected":
+			isup = true
+		case "State                              : disconnected":
+			isup = false
+		default:
+			continue
+		}
+		if name != "" {
+			if v, ok := ifaces[name]; ok && v != isup {
+				return fmt.Errorf("%s:%s isup=%v: ipv4 and ipv6 report different interface state", ipver, name, isup)
+			}
+			ifaces[name] = isup
+			name = ""
+		}
+	}
+	return nil
+}
+
+func TestInterfacesWithNetsh(t *testing.T) {
+	if !netshSpeaksEnglish(t) {
+		t.Skip("English version of netsh required for this test")
+	}
+
+	toString := func(name string, isup bool) string {
+		if isup {
+			return name + ":up"
+		}
+		return name + ":down"
+	}
+
+	ift, err := Interfaces()
+	if err != nil {
+		t.Fatal(err)
+	}
+	have := make([]string, 0)
+	for _, ifi := range ift {
+		have = append(have, toString(ifi.Name, ifi.Flags&FlagUp != 0))
+	}
+	sort.Strings(have)
+
+	ifaces := make(map[string]bool)
+	err = netshInterfaceIPShowInterface("ipv6", ifaces)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = netshInterfaceIPShowInterface("ipv4", ifaces)
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := make([]string, 0)
+	for name, isup := range ifaces {
+		want = append(want, toString(name, isup))
+	}
+	sort.Strings(want)
+
+	if strings.Join(want, "/") != strings.Join(have, "/") {
+		t.Fatalf("unexpected interface list %q, want %q", have, want)
+	}
+}
+
+func netshInterfaceIPv4ShowAddress(name string, netshOutput []byte) []string {
+	// Address information is listed like:
+	//
+	//Configuration for interface "Local Area Connection"
+	//    DHCP enabled:                         Yes
+	//    IP Address:                           10.0.0.2
+	//    Subnet Prefix:                        10.0.0.0/24 (mask 255.255.255.0)
+	//    IP Address:                           10.0.0.3
+	//    Subnet Prefix:                        10.0.0.0/24 (mask 255.255.255.0)
+	//    Default Gateway:                      10.0.0.254
+	//    Gateway Metric:                       0
+	//    InterfaceMetric:                      10
+	//
+	//Configuration for interface "Loopback Pseudo-Interface 1"
+	//    DHCP enabled:                         No
+	//    IP Address:                           127.0.0.1
+	//    Subnet Prefix:                        127.0.0.0/8 (mask 255.0.0.0)
+	//    InterfaceMetric:                      50
+	//
+	addrs := make([]string, 0)
+	var addr, subnetprefix string
+	var processingOurInterface bool
+	lines := bytes.Split(netshOutput, []byte{'\r', '\n'})
+	for _, line := range lines {
+		if !processingOurInterface {
+			if !bytes.HasPrefix(line, []byte("Configuration for interface")) {
+				continue
+			}
+			if !bytes.Contains(line, []byte(`"`+name+`"`)) {
+				continue
+			}
+			processingOurInterface = true
+			continue
+		}
+		if len(line) == 0 {
+			break
+		}
+		if bytes.Contains(line, []byte("Subnet Prefix:")) {
+			f := bytes.Split(line, []byte{':'})
+			if len(f) == 2 {
+				f = bytes.Split(f[1], []byte{'('})
+				if len(f) == 2 {
+					f = bytes.Split(f[0], []byte{'/'})
+					if len(f) == 2 {
+						subnetprefix = string(bytes.TrimSpace(f[1]))
+						if addr != "" && subnetprefix != "" {
+							addrs = append(addrs, addr+"/"+subnetprefix)
+						}
+					}
+				}
+			}
+		}
+		addr = ""
+		if bytes.Contains(line, []byte("IP Address:")) {
+			f := bytes.Split(line, []byte{':'})
+			if len(f) == 2 {
+				addr = string(bytes.TrimSpace(f[1]))
+			}
+		}
+	}
+	return addrs
+}
+
+func netshInterfaceIPv6ShowAddress(name string, netshOutput []byte) []string {
+	// Address information is listed like:
+	//
+	//Address ::1 Parameters
+	//---------------------------------------------------------
+	//Interface Luid     : Loopback Pseudo-Interface 1
+	//Scope Id           : 0.0
+	//Valid Lifetime     : infinite
+	//Preferred Lifetime : infinite
+	//DAD State          : Preferred
+	//Address Type       : Other
+	//Skip as Source     : false
+	//
+	//Address XXXX::XXXX:XXXX:XXXX:XXXX%11 Parameters
+	//---------------------------------------------------------
+	//Interface Luid     : Local Area Connection
+	//Scope Id           : 0.11
+	//Valid Lifetime     : infinite
+	//Preferred Lifetime : infinite
+	//DAD State          : Preferred
+	//Address Type       : Other
+	//Skip as Source     : false
+	//
+
+	// TODO: need to test ipv6 netmask too, but netsh does not outputs it
+	var addr string
+	addrs := make([]string, 0)
+	lines := bytes.Split(netshOutput, []byte{'\r', '\n'})
+	for _, line := range lines {
+		if addr != "" {
+			if len(line) == 0 {
+				addr = ""
+				continue
+			}
+			if string(line) != "Interface Luid     : "+name {
+				continue
+			}
+			addrs = append(addrs, addr)
+			addr = ""
+			continue
+		}
+		if !bytes.HasPrefix(line, []byte("Address")) {
+			continue
+		}
+		if !bytes.HasSuffix(line, []byte("Parameters")) {
+			continue
+		}
+		f := bytes.Split(line, []byte{' '})
+		if len(f) != 3 {
+			continue
+		}
+		// remove scope ID if present
+		f = bytes.Split(f[1], []byte{'%'})
+
+		// netsh can create IPv4-embedded IPv6 addresses, like fe80::5efe:192.168.140.1.
+		// Convert these to all hexadecimal fe80::5efe:c0a8:8c01 for later string comparisons.
+		ipv4Tail := regexp.MustCompile(`:\d+\.\d+\.\d+\.\d+$`)
+		if ipv4Tail.Match(f[0]) {
+			f[0] = []byte(ParseIP(string(f[0])).String())
+		}
+
+		addr = string(bytes.ToLower(bytes.TrimSpace(f[0])))
+	}
+	return addrs
+}
+
+func TestInterfaceAddrsWithNetsh(t *testing.T) {
+	if !netshSpeaksEnglish(t) {
+		t.Skip("English version of netsh required for this test")
+	}
+
+	outIPV4, err := runCmd("netsh", "interface", "ipv4", "show", "address")
+	if err != nil {
+		t.Fatal(err)
+	}
+	outIPV6, err := runCmd("netsh", "interface", "ipv6", "show", "address", "level=verbose")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ift, err := Interfaces()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, ifi := range ift {
+		// Skip the interface if it's down.
+		if (ifi.Flags & FlagUp) == 0 {
+			continue
+		}
+		have := make([]string, 0)
+		addrs, err := ifi.Addrs()
+		if err != nil {
+			t.Fatal(err)
+		}
+		for _, addr := range addrs {
+			switch addr := addr.(type) {
+			case *IPNet:
+				if addr.IP.To4() != nil {
+					have = append(have, addr.String())
+				}
+				if addr.IP.To16() != nil && addr.IP.To4() == nil {
+					// netsh does not output netmask for ipv6, so ignore ipv6 mask
+					have = append(have, addr.IP.String())
+				}
+			case *IPAddr:
+				if addr.IP.To4() != nil {
+					have = append(have, addr.String())
+				}
+				if addr.IP.To16() != nil && addr.IP.To4() == nil {
+					// netsh does not output netmask for ipv6, so ignore ipv6 mask
+					have = append(have, addr.IP.String())
+				}
+			}
+		}
+		sort.Strings(have)
+
+		want := netshInterfaceIPv4ShowAddress(ifi.Name, outIPV4)
+		wantIPv6 := netshInterfaceIPv6ShowAddress(ifi.Name, outIPV6)
+		want = append(want, wantIPv6...)
+		sort.Strings(want)
+
+		if strings.Join(want, "/") != strings.Join(have, "/") {
+			t.Errorf("%s: unexpected addresses list %q, want %q", ifi.Name, have, want)
+		}
+	}
+}
+
+// check that getmac exists as a powershell command, and that it
+// speaks English.
+func checkGetmac(t *testing.T) {
+	out, err := runCmd("getmac", "/?")
+	if err != nil {
+		if strings.Contains(err.Error(), "term 'getmac' is not recognized as the name of a cmdlet") {
+			t.Skipf("getmac not available")
+		}
+		t.Fatal(err)
+	}
+	if !bytes.Contains(out, []byte("network adapters on a system")) {
+		t.Skipf("skipping test on non-English system")
+	}
+}
+
+func TestInterfaceHardwareAddrWithGetmac(t *testing.T) {
+	checkGetmac(t)
+
+	ift, err := Interfaces()
+	if err != nil {
+		t.Fatal(err)
+	}
+	have := make(map[string]string)
+	for _, ifi := range ift {
+		if ifi.Flags&FlagLoopback != 0 {
+			// no MAC address for loopback interfaces
+			continue
+		}
+		have[ifi.Name] = ifi.HardwareAddr.String()
+	}
+
+	out, err := runCmd("getmac", "/fo", "list", "/v")
+	if err != nil {
+		t.Fatal(err)
+	}
+	// getmac output looks like:
+	//
+	//Connection Name:  Local Area Connection
+	//Network Adapter:  Intel Gigabit Network Connection
+	//Physical Address: XX-XX-XX-XX-XX-XX
+	//Transport Name:   \Device\Tcpip_{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}
+	//
+	//Connection Name:  Wireless Network Connection
+	//Network Adapter:  Wireles WLAN Card
+	//Physical Address: XX-XX-XX-XX-XX-XX
+	//Transport Name:   Media disconnected
+	//
+	//Connection Name:  Bluetooth Network Connection
+	//Network Adapter:  Bluetooth Device (Personal Area Network)
+	//Physical Address: N/A
+	//Transport Name:   Hardware not present
+	//
+	//Connection Name:  VMware Network Adapter VMnet8
+	//Network Adapter:  VMware Virtual Ethernet Adapter for VMnet8
+	//Physical Address: Disabled
+	//Transport Name:   Disconnected
+	//
+	want := make(map[string]string)
+	group := make(map[string]string) // name / values for single adapter
+	getValue := func(name string) string {
+		value, found := group[name]
+		if !found {
+			t.Fatalf("%q has no %q line in it", group, name)
+		}
+		if value == "" {
+			t.Fatalf("%q has empty %q value", group, name)
+		}
+		return value
+	}
+	processGroup := func() {
+		if len(group) == 0 {
+			return
+		}
+		tname := strings.ToLower(getValue("Transport Name"))
+		if tname == "n/a" {
+			// skip these
+			return
+		}
+		addr := strings.ToLower(getValue("Physical Address"))
+		if addr == "disabled" || addr == "n/a" {
+			// skip these
+			return
+		}
+		addr = strings.ReplaceAll(addr, "-", ":")
+		cname := getValue("Connection Name")
+		want[cname] = addr
+		group = make(map[string]string)
+	}
+	lines := bytes.Split(out, []byte{'\r', '\n'})
+	for _, line := range lines {
+		if len(line) == 0 {
+			processGroup()
+			continue
+		}
+		i := bytes.IndexByte(line, ':')
+		if i == -1 {
+			t.Fatalf("line %q has no : in it", line)
+		}
+		group[string(line[:i])] = string(bytes.TrimSpace(line[i+1:]))
+	}
+	processGroup()
+
+	dups := make(map[string][]string)
+	for name, addr := range want {
+		if _, ok := dups[addr]; !ok {
+			dups[addr] = make([]string, 0)
+		}
+		dups[addr] = append(dups[addr], name)
+	}
+
+nextWant:
+	for name, wantAddr := range want {
+		if haveAddr, ok := have[name]; ok {
+			if haveAddr != wantAddr {
+				t.Errorf("unexpected MAC address for %q - %v, want %v", name, haveAddr, wantAddr)
+			}
+			continue
+		}
+		// We could not find the interface in getmac output by name.
+		// But sometimes getmac lists many interface names
+		// for the same MAC address. If that is the case here,
+		// and we can match at least one of those names,
+		// let's ignore the other names.
+		if dupNames, ok := dups[wantAddr]; ok && len(dupNames) > 1 {
+			for _, dupName := range dupNames {
+				if haveAddr, ok := have[dupName]; ok && haveAddr == wantAddr {
+					continue nextWant
+				}
+			}
+		}
+		t.Errorf("getmac lists %q, but it could not be found among Go interfaces %v", name, have)
+	}
+}