qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-09-30 16:08:36 -06:00
Code Releases Activity

net: adjust dual stack support on dragonfly

Browse Source 
As mentioned in
http://gitweb.dragonflybsd.org/dragonfly.git/commit/727ccde8cce813911d885b7f6ed749dcea68a886,
DragonFly BSD is dropping support for IPv6 IPv4-mapped address.
Unfortunately, on some released versions we see the kernels pretend to
support the feature but actually not (unless tweaking some kernel states
via sysctl.)

To avoid unpredictable behavior, the net package assumes that all
DragonFly BSD kernels don't support IPv6 IPv4-mapped address.

Fixes #10764.

Change-Id: Ic7af3651e0372ec03774432fbb6b2eb0c455e994
Reviewed-on: https://go-review.googlesource.com/10071
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Mikio Hara 2015-05-14 10:18:10 +09:00
parent cca39ff3b1
commit eeb64b7fef
7 changed files with 102 additions and 88 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/net/ipsock_posix.go
View File

@ -9,10 +9,18 @@
package net
import (
"runtime"
"syscall"
"time"
)
// BUG(rsc,mikio): On DragonFly BSD and OpenBSD, listening on the
// "tcp" and "udp" networks does not listen for both IPv4 and IPv6
// connections. This is due to the fact that IPv4 traffic will not be
// routed to an IPv6 socket - two separate sockets are required if
// both address families are to be supported.
// See inet6(4) for details.
func probeIPv4Stack() bool {
s, err := socketFunc(syscall.AF_INET, syscall.SOCK_STREAM, syscall.IPPROTO_TCP)
switch err {
@ -41,13 +49,28 @@ func probeIPv6Stack() (supportsIPv6, supportsIPv4map bool) {
var probes = []struct {
laddr TCPAddr
value int
ok bool
}{
// IPv6 communication capability
{laddr: TCPAddr{IP: ParseIP("::1")}, value: 1},
// IPv6 IPv4-mapped address communication capability
{laddr: TCPAddr{IP: IPv4(127, 0, 0, 1)}, value: 0},
}
var supps [2]bool
switch runtime.GOOS {
case "dragonfly", "openbsd":
// Some released versions of DragonFly BSD pretend to
// accept IPV6_V6ONLY=0 successfully, but the state
// still stays IPV6_V6ONLY=1. Eventually DragonFly BSD
// stops preteding, but the transition period would
// cause unpredictable behavior and we need to avoid
// it.
//
// OpenBSD also doesn't support IPV6_V6ONLY=0 but it
// never pretends to accept IPV6_V6OLY=0. It always
// returns an error and we don't need to probe the
// capability.
probes = probes[:1]
}
for i := range probes {
s, err := socketFunc(syscall.AF_INET6, syscall.SOCK_STREAM, syscall.IPPROTO_TCP)
@ -63,10 +86,10 @@ func probeIPv6Stack() (supportsIPv6, supportsIPv4map bool) {
if err := syscall.Bind(s, sa); err != nil {
continue
}
probes[i].ok = true
supps[i] = true
}
return probes[0].ok, probes[1].ok
return supps[0], supps[1]
}
// favoriteAddrFamily returns the appropriate address family to

6
src/net/listen_test.go
View File

@ -218,8 +218,6 @@ var dualStackTCPListenerTests = []struct {
// listening address and same port.
func TestDualStackTCPListener(t *testing.T) {
switch runtime.GOOS {
case "dragonfly":
t.Skip("not supported on DragonFly, see golang.org/issue/10729")
case "nacl", "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
@ -233,7 +231,7 @@ func TestDualStackTCPListener(t *testing.T) {
continue
}
if runtime.GOOS == "openbsd" && differentWildcardAddr(tt.address1, tt.address2) {
if !supportsIPv4map && differentWildcardAddr(tt.address1, tt.address2) {
tt.xerr = nil
}
var firstErr, secondErr error
@ -320,7 +318,7 @@ func TestDualStackUDPListener(t *testing.T) {
continue
}
if runtime.GOOS == "openbsd" && differentWildcardAddr(tt.address1, tt.address2) {
if !supportsIPv4map && differentWildcardAddr(tt.address1, tt.address2) {
tt.xerr = nil
}
var firstErr, secondErr error

51
src/net/main_test.go
View File

@ -59,6 +59,16 @@ func TestMain(m *testing.M) {
os.Exit(st)
}
type ipv6LinkLocalUnicastTest struct {
network, address string
nameLookup bool
}
var (
ipv6LinkLocalUnicastTCPTests []ipv6LinkLocalUnicastTest
ipv6LinkLocalUnicastUDPTests []ipv6LinkLocalUnicastTest
)
func setupTestData() {
if supportsIPv4 {
resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
@ -81,7 +91,8 @@ func setupTestData() {
resolveIPAddrTests = append(resolveIPAddrTests, resolveIPAddrTest{"ip6", "localhost", &IPAddr{IP: IPv6loopback}, nil})
}
if ifi := loopbackInterface(); ifi != nil {
ifi := loopbackInterface()
if ifi != nil {
index := fmt.Sprintf("%v", ifi.Index)
resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
{"tcp6", "[fe80::1%" + ifi.Name + "]:1", &TCPAddr{IP: ParseIP("fe80::1"), Port: 1, Zone: zoneToString(ifi.Index)}, nil},
@ -96,6 +107,44 @@ func setupTestData() {
{"ip6", "fe80::1%" + index, &IPAddr{IP: ParseIP("fe80::1"), Zone: index}, nil},
}...)
}
addr := ipv6LinkLocalUnicastAddr(ifi)
if addr != "" {
if runtime.GOOS != "dragonfly" {
ipv6LinkLocalUnicastTCPTests = append(ipv6LinkLocalUnicastTCPTests, []ipv6LinkLocalUnicastTest{
{"tcp", "[" + addr + "%" + ifi.Name + "]:0", false},
}...)
ipv6LinkLocalUnicastUDPTests = append(ipv6LinkLocalUnicastUDPTests, []ipv6LinkLocalUnicastTest{
{"udp", "[" + addr + "%" + ifi.Name + "]:0", false},
}...)
}
ipv6LinkLocalUnicastTCPTests = append(ipv6LinkLocalUnicastTCPTests, []ipv6LinkLocalUnicastTest{
{"tcp6", "[" + addr + "%" + ifi.Name + "]:0", false},
}...)
ipv6LinkLocalUnicastUDPTests = append(ipv6LinkLocalUnicastUDPTests, []ipv6LinkLocalUnicastTest{
{"udp6", "[" + addr + "%" + ifi.Name + "]:0", false},
}...)
switch runtime.GOOS {
case "darwin", "dragonfly", "freebsd", "openbsd", "netbsd":
ipv6LinkLocalUnicastTCPTests = append(ipv6LinkLocalUnicastTCPTests, []ipv6LinkLocalUnicastTest{
{"tcp", "[localhost%" + ifi.Name + "]:0", true},
{"tcp6", "[localhost%" + ifi.Name + "]:0", true},
}...)
ipv6LinkLocalUnicastUDPTests = append(ipv6LinkLocalUnicastUDPTests, []ipv6LinkLocalUnicastTest{
{"udp", "[localhost%" + ifi.Name + "]:0", true},
{"udp6", "[localhost%" + ifi.Name + "]:0", true},
}...)
case "linux":
ipv6LinkLocalUnicastTCPTests = append(ipv6LinkLocalUnicastTCPTests, []ipv6LinkLocalUnicastTest{
{"tcp", "[ip6-localhost%" + ifi.Name + "]:0", true},
{"tcp6", "[ip6-localhost%" + ifi.Name + "]:0", true},
}...)
ipv6LinkLocalUnicastUDPTests = append(ipv6LinkLocalUnicastUDPTests, []ipv6LinkLocalUnicastTest{
{"udp", "[ip6-localhost%" + ifi.Name + "]:0", true},
{"udp6", "[ip6-localhost%" + ifi.Name + "]:0", true},
}...)
}
}
}
func printRunningGoroutines() {

2
src/net/sockopt_bsd.go
View File

@ -25,7 +25,7 @@ func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_PORTRANGE, syscall.IPV6_PORTRANGE_HIGH)
}
}
if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
if supportsIPv4map && family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
// Allow both IP versions even if the OS default
// is otherwise. Note that some operating systems
// never admit this option.

36
src/net/tcp_test.go
View File

@ -367,39 +367,11 @@ func TestIPv6LinkLocalUnicastTCP(t *testing.T) {
t.Skip("avoid external network")
}
if !supportsIPv6 {
t.Skip("ipv6 is not supported")
}
ifi := loopbackInterface()
if ifi == nil {
t.Skip("loopback interface not found")
}
laddr := ipv6LinkLocalUnicastAddr(ifi)
if laddr == "" {
t.Skip("ipv6 unicast address on loopback not found")
t.Skip("IPv6 is not supported")
}
type test struct {
net, addr string
nameLookup bool
}
var tests = []test{
{"tcp", "[" + laddr + "%" + ifi.Name + "]:0", false},
{"tcp6", "[" + laddr + "%" + ifi.Name + "]:0", false},
}
switch runtime.GOOS {
case "darwin", "freebsd", "openbsd", "netbsd":
tests = append(tests, []test{
{"tcp", "[localhost%" + ifi.Name + "]:0", true},
{"tcp6", "[localhost%" + ifi.Name + "]:0", true},
}...)
case "linux":
tests = append(tests, []test{
{"tcp", "[ip6-localhost%" + ifi.Name + "]:0", true},
{"tcp6", "[ip6-localhost%" + ifi.Name + "]:0", true},
}...)
}
for i, tt := range tests {
ln, err := Listen(tt.net, tt.addr)
for i, tt := range ipv6LinkLocalUnicastTCPTests {
ln, err := Listen(tt.network, tt.address)
if err != nil {
// It might return "LookupHost returned no
// suitable address" error on some platforms.
@ -420,7 +392,7 @@ func TestIPv6LinkLocalUnicastTCP(t *testing.T) {
t.Fatalf("got %v; expected a proper address with zone identifier", la)
}
c, err := Dial(tt.net, ls.Listener.Addr().String())
c, err := Dial(tt.network, ls.Listener.Addr().String())
if err != nil {
t.Fatal(err)
}

5
src/net/tcpsock_posix.go
View File

@ -13,11 +13,6 @@ import (
"time"
)
// BUG(rsc): On OpenBSD, listening on the "tcp" network does not listen for
// both IPv4 and IPv6 connections. This is due to the fact that IPv4 traffic
// will not be routed to an IPv6 socket - two separate sockets are required
// if both AFs are to be supported. See inet6(4) on OpenBSD for details.
func sockaddrToTCP(sa syscall.Sockaddr) Addr {
switch sa := sa.(type) {
case *syscall.SockaddrInet4:

61
src/net/udp_test.go
View File

@ -238,55 +238,32 @@ func TestIPv6LinkLocalUnicastUDP(t *testing.T) {
t.Skip("avoid external network")
}
if !supportsIPv6 {
t.Skip("ipv6 is not supported")
}
ifi := loopbackInterface()
if ifi == nil {
t.Skip("loopback interface not found")
}
laddr := ipv6LinkLocalUnicastAddr(ifi)
if laddr == "" {
t.Skip("ipv6 unicast address on loopback not found")
t.Skip("IPv6 is not supported")
}
type test struct {
net, addr string
nameLookup bool
}
var tests = []test{
{"udp", "[" + laddr + "%" + ifi.Name + "]:0", false},
{"udp6", "[" + laddr + "%" + ifi.Name + "]:0", false},
}
// The first udp test fails on DragonFly - see issue 7473.
if runtime.GOOS == "dragonfly" {
tests = tests[1:]
}
switch runtime.GOOS {
case "darwin", "dragonfly", "freebsd", "openbsd", "netbsd":
tests = append(tests, []test{
{"udp", "[localhost%" + ifi.Name + "]:0", true},
{"udp6", "[localhost%" + ifi.Name + "]:0", true},
}...)
case "linux":
tests = append(tests, []test{
{"udp", "[ip6-localhost%" + ifi.Name + "]:0", true},
{"udp6", "[ip6-localhost%" + ifi.Name + "]:0", true},
}...)
}
for _, tt := range tests {
c1, err := ListenPacket(tt.net, tt.addr)
for i, tt := range ipv6LinkLocalUnicastUDPTests {
c1, err := ListenPacket(tt.network, tt.address)
if err != nil {
// It might return "LookupHost returned no
// suitable address" error on some platforms.
t.Log(err)
continue
}
defer c1.Close()
ls, err := (&packetListener{PacketConn: c1}).newLocalServer()
if err != nil {
t.Fatal(err)
}
defer ls.teardown()
ch := make(chan error, 1)
handler := func(ls *localPacketServer, c PacketConn) { packetTransponder(c, ch) }
if err := ls.buildup(handler); err != nil {
t.Fatal(err)
}
if la, ok := c1.LocalAddr().(*UDPAddr); !ok || !tt.nameLookup && la.Zone == "" {
t.Fatalf("got %v; expected a proper address with zone identifier", la)
}
c2, err := Dial(tt.net, c1.LocalAddr().String())
c2, err := Dial(tt.network, ls.PacketConn.LocalAddr().String())
if err != nil {
t.Fatal(err)
}
@ -302,12 +279,12 @@ func TestIPv6LinkLocalUnicastUDP(t *testing.T) {
t.Fatal(err)
}
b := make([]byte, 32)
if _, from, err := c1.ReadFrom(b); err != nil {
if _, err := c2.Read(b); err != nil {
t.Fatal(err)
} else {
if ra, ok := from.(*UDPAddr); !ok || !tt.nameLookup && ra.Zone == "" {
t.Fatalf("got %v; expected a proper address with zone identifier", ra)
}
}
for err := range ch {
t.Errorf("#%d: %v", i, err)
}
}
}