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net: avoid Shutdown during Close

Browse Source 
Once we've evicted all the blocked I/O, the ref count
should go to zero quickly, so it should be safe to
postpone the close(2) until then.

Fixes #1898.
Fixes #2116.
Fixes #2122.

R=golang-dev, mikioh.mikioh, bradfitz, fullung, iant
CC=golang-dev
https://golang.org/cl/5649076
This commit is contained in:
Russ Cox 2012-02-14 00:40:37 -05:00
parent b7360b9b06
commit 5e4e3d8e44
15 changed files with 440 additions and 200 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/pkg/net/dial_test.go
View File

@ -114,6 +114,12 @@ func TestSelfConnect(t *testing.T) {
if testing.Short() {
n = 1000
}
switch runtime.GOOS {
case "darwin", "freebsd", "openbsd", "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 := Dial("tcp", addr)
if err == nil {

252
src/pkg/net/fd.go
View File

@ -7,6 +7,7 @@
package net
import (
"errors"
"io"
"os"
"sync"
@ -19,6 +20,9 @@ type netFD struct {
// locking/lifetime of sysfd
sysmu sync.Mutex
sysref int
// must lock both sysmu and pollserver to write
// can lock either to read
closing bool
// immutable until Close
@ -27,8 +31,8 @@ type netFD struct {
sotype int
isConnected bool
sysfile *os.File
cr chan bool
cw chan bool
cr chan error
cw chan error
net string
laddr Addr
raddr Addr
@ -86,19 +90,14 @@ type pollServer struct {
deadline int64 // next deadline (nsec since 1970)
}
func (s *pollServer) AddFD(fd *netFD, mode int) {
intfd := fd.sysfd
if intfd < 0 {
// fd closed underfoot
if mode == 'r' {
fd.cr <- true
} else {
fd.cw <- true
}
return
}
func (s *pollServer) AddFD(fd *netFD, mode int) error {
s.Lock()
intfd := fd.sysfd
if intfd < 0 || fd.closing {
// fd closed underfoot
s.Unlock()
return errClosing
}
var t int64
key := intfd << 1
@ -124,12 +123,28 @@ func (s *pollServer) AddFD(fd *netFD, mode int) {
if wake {
doWakeup = true
}
s.Unlock()
if doWakeup {
s.Wakeup()
}
return nil
}
// Evict evicts fd from the pending list, unblocking
// any I/O running on fd. The caller must have locked
// pollserver.
func (s *pollServer) Evict(fd *netFD) {
if s.pending[fd.sysfd<<1] == fd {
s.WakeFD(fd, 'r', errClosing)
s.poll.DelFD(fd.sysfd, 'r')
delete(s.pending, fd.sysfd<<1)
}
if s.pending[fd.sysfd<<1|1] == fd {
s.WakeFD(fd, 'w', errClosing)
s.poll.DelFD(fd.sysfd, 'w')
delete(s.pending, fd.sysfd<<1|1)
}
}
var wakeupbuf [1]byte
@ -149,16 +164,16 @@ func (s *pollServer) LookupFD(fd int, mode int) *netFD {
return netfd
}
func (s *pollServer) WakeFD(fd *netFD, mode int) {
func (s *pollServer) WakeFD(fd *netFD, mode int, err error) {
if mode == 'r' {
for fd.ncr > 0 {
fd.ncr--
fd.cr <- true
fd.cr <- err
}
} else {
for fd.ncw > 0 {
fd.ncw--
fd.cw <- true
fd.cw <- err
}
}
}
@ -196,7 +211,7 @@ func (s *pollServer) CheckDeadlines() {
s.poll.DelFD(fd.sysfd, mode)
fd.wdeadline = -1
}
s.WakeFD(fd, mode)
s.WakeFD(fd, mode, nil)
} else if next_deadline == 0 || t < next_deadline {
next_deadline = t
}
@ -240,19 +255,25 @@ func (s *pollServer) Run() {
print("pollServer: unexpected wakeup for fd=", fd, " mode=", string(mode), "\n")
continue
}
s.WakeFD(netfd, mode)
s.WakeFD(netfd, mode, nil)
}
}
}
func (s *pollServer) WaitRead(fd *netFD) {
s.AddFD(fd, 'r')
<-fd.cr
func (s *pollServer) WaitRead(fd *netFD) error {
err := s.AddFD(fd, 'r')
if err == nil {
err = <-fd.cr
}
return err
}
func (s *pollServer) WaitWrite(fd *netFD) {
s.AddFD(fd, 'w')
<-fd.cw
func (s *pollServer) WaitWrite(fd *netFD) error {
err := s.AddFD(fd, 'w')
if err == nil {
err = <-fd.cw
}
return err
}
// Network FD methods.
@ -280,8 +301,8 @@ func newFD(fd, family, sotype int, net string) (*netFD, error) {
sotype: sotype,
net: net,
}
netfd.cr = make(chan bool, 1)
netfd.cw = make(chan bool, 1)
netfd.cr = make(chan error, 1)
netfd.cw = make(chan error, 1)
return netfd, nil
}
@ -301,7 +322,9 @@ func (fd *netFD) setAddr(laddr, raddr Addr) {
func (fd *netFD) connect(ra syscall.Sockaddr) error {
err := syscall.Connect(fd.sysfd, ra)
if err == syscall.EINPROGRESS {
pollserver.WaitWrite(fd)
if err = pollserver.WaitWrite(fd); err != nil {
return err
}
var e int
e, err = syscall.GetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_ERROR)
if err != nil {
@ -314,24 +337,37 @@ func (fd *netFD) connect(ra syscall.Sockaddr) error {
return err
}
var errClosing = errors.New("use of closed network connection")
// Add a reference to this fd.
func (fd *netFD) incref() {
// If closing==true, pollserver must be locked; mark the fd as closing.
// Returns an error if the fd cannot be used.
func (fd *netFD) incref(closing bool) error {
if fd == nil {
return errClosing
}
fd.sysmu.Lock()
if fd.closing {
fd.sysmu.Unlock()
return errClosing
}
fd.sysref++
if closing {
fd.closing = true
}
fd.sysmu.Unlock()
return nil
}
// Remove a reference to this FD and close if we've been asked to do so (and
// there are no references left.
func (fd *netFD) decref() {
if fd == nil {
return
}
fd.sysmu.Lock()
fd.sysref--
if fd.closing && fd.sysref == 0 && fd.sysfd >= 0 {
// In case the user has set linger, switch to blocking mode so
// the close blocks. As long as this doesn't happen often, we
// can handle the extra OS processes. Otherwise we'll need to
// use the pollserver for Close too. Sigh.
syscall.SetNonblock(fd.sysfd, false)
if fd.closing && fd.sysref == 0 && fd.sysfile != nil {
fd.sysfile.Close()
fd.sysfile = nil
fd.sysfd = -1
@ -340,21 +376,26 @@ func (fd *netFD) decref() {
}
func (fd *netFD) Close() error {
if fd == nil || fd.sysfile == nil {
return os.EINVAL
pollserver.Lock() // needed for both fd.incref(true) and pollserver.Evict
defer pollserver.Unlock()
if err := fd.incref(true); err != nil {
return err
}
fd.incref()
syscall.Shutdown(fd.sysfd, syscall.SHUT_RDWR)
fd.closing = true
// Unblock any I/O. Once it all unblocks and returns,
// so that it cannot be referring to fd.sysfd anymore,
// the final decref will close fd.sysfd. This should happen
// fairly quickly, since all the I/O is non-blocking, and any
// attempts to block in the pollserver will return errClosing.
pollserver.Evict(fd)
fd.decref()
return nil
}
func (fd *netFD) shutdown(how int) error {
if fd == nil || fd.sysfile == nil {
return os.EINVAL
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.Shutdown(fd.sysfd, how)
if err != nil {
return &OpError{"shutdown", fd.net, fd.laddr, err}
@ -371,24 +412,21 @@ func (fd *netFD) CloseWrite() error {
}
func (fd *netFD) Read(p []byte) (n int, err error) {
if fd == nil {
return 0, os.EINVAL
}
fd.rio.Lock()
defer fd.rio.Unlock()
fd.incref()
defer fd.decref()
if fd.sysfile == nil {
return 0, os.EINVAL
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
for {
n, err = syscall.Read(int(fd.sysfile.Fd()), p)
n, err = syscall.Read(int(fd.sysfd), p)
if err == syscall.EAGAIN {
if fd.rdeadline >= 0 {
pollserver.WaitRead(fd)
continue
}
err = errTimeout
if fd.rdeadline >= 0 {
if err = pollserver.WaitRead(fd); err == nil {
continue
}
}
}
if err != nil {
n = 0
@ -404,49 +442,49 @@ func (fd *netFD) Read(p []byte) (n int, err error) {
}
func (fd *netFD) ReadFrom(p []byte) (n int, sa syscall.Sockaddr, err error) {
if fd == nil || fd.sysfile == nil {
return 0, nil, os.EINVAL
}
fd.rio.Lock()
defer fd.rio.Unlock()
fd.incref()
if err := fd.incref(false); err != nil {
return 0, nil, err
}
defer fd.decref()
for {
n, sa, err = syscall.Recvfrom(fd.sysfd, p, 0)
if err == syscall.EAGAIN {
if fd.rdeadline >= 0 {
pollserver.WaitRead(fd)
continue
}
err = errTimeout
if fd.rdeadline >= 0 {
if err = pollserver.WaitRead(fd); err == nil {
continue
}
}
}
if err != nil {
n = 0
}
break
}
if err != nil {
if err != nil && err != io.EOF {
err = &OpError{"read", fd.net, fd.laddr, err}
}
return
}
func (fd *netFD) ReadMsg(p []byte, oob []byte) (n, oobn, flags int, sa syscall.Sockaddr, err error) {
if fd == nil || fd.sysfile == nil {
return 0, 0, 0, nil, os.EINVAL
}
fd.rio.Lock()
defer fd.rio.Unlock()
fd.incref()
if err := fd.incref(false); err != nil {
return 0, 0, 0, nil, err
}
defer fd.decref()
for {
n, oobn, flags, sa, err = syscall.Recvmsg(fd.sysfd, p, oob, 0)
if err == syscall.EAGAIN {
if fd.rdeadline >= 0 {
pollserver.WaitRead(fd)
continue
}
err = errTimeout
if fd.rdeadline >= 0 {
if err = pollserver.WaitRead(fd); err == nil {
continue
}
}
}
if err == nil && n == 0 {
err = io.EOF
@ -461,12 +499,11 @@ func (fd *netFD) ReadMsg(p []byte, oob []byte) (n, oobn, flags int, sa syscall.S
}
func (fd *netFD) Write(p []byte) (int, error) {
if fd == nil {
return 0, os.EINVAL
}
fd.wio.Lock()
defer fd.wio.Unlock()
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
if fd.sysfile == nil {
return 0, os.EINVAL
@ -476,7 +513,7 @@ func (fd *netFD) Write(p []byte) (int, error) {
nn := 0
for {
var n int
n, err = syscall.Write(int(fd.sysfile.Fd()), p[nn:])
n, err = syscall.Write(int(fd.sysfd), p[nn:])
if n > 0 {
nn += n
}
@ -484,11 +521,12 @@ func (fd *netFD) Write(p []byte) (int, error) {
break
}
if err == syscall.EAGAIN {
if fd.wdeadline >= 0 {
pollserver.WaitWrite(fd)
continue
}
err = errTimeout
if fd.wdeadline >= 0 {
if err = pollserver.WaitWrite(fd); err == nil {
continue
}
}
}
if err != nil {
n = 0
@ -506,21 +544,21 @@ func (fd *netFD) Write(p []byte) (int, error) {
}
func (fd *netFD) WriteTo(p []byte, sa syscall.Sockaddr) (n int, err error) {
if fd == nil || fd.sysfile == nil {
return 0, os.EINVAL
}
fd.wio.Lock()
defer fd.wio.Unlock()
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
for {
err = syscall.Sendto(fd.sysfd, p, 0, sa)
if err == syscall.EAGAIN {
if fd.wdeadline >= 0 {
pollserver.WaitWrite(fd)
continue
}
err = errTimeout
if fd.wdeadline >= 0 {
if err = pollserver.WaitWrite(fd); err == nil {
continue
}
}
}
break
}
@ -533,21 +571,21 @@ func (fd *netFD) WriteTo(p []byte, sa syscall.Sockaddr) (n int, err error) {
}
func (fd *netFD) WriteMsg(p []byte, oob []byte, sa syscall.Sockaddr) (n int, oobn int, err error) {
if fd == nil || fd.sysfile == nil {
return 0, 0, os.EINVAL
}
fd.wio.Lock()
defer fd.wio.Unlock()
fd.incref()
if err := fd.incref(false); err != nil {
return 0, 0, err
}
defer fd.decref()
for {
err = syscall.Sendmsg(fd.sysfd, p, oob, sa, 0)
if err == syscall.EAGAIN {
if fd.wdeadline >= 0 {
pollserver.WaitWrite(fd)
continue
}
err = errTimeout
if fd.wdeadline >= 0 {
if err = pollserver.WaitWrite(fd); err == nil {
continue
}
}
}
break
}
@ -561,11 +599,9 @@ func (fd *netFD) WriteMsg(p []byte, oob []byte, sa syscall.Sockaddr) (n int, oob
}
func (fd *netFD) accept(toAddr func(syscall.Sockaddr) Addr) (netfd *netFD, err error) {
if fd == nil || fd.sysfile == nil {
return nil, os.EINVAL
if err := fd.incref(false); err != nil {
return nil, err
}
fd.incref()
defer fd.decref()
// See ../syscall/exec.go for description of ForkLock.
@ -574,19 +610,17 @@ func (fd *netFD) accept(toAddr func(syscall.Sockaddr) Addr) (netfd *netFD, err e
var s int
var rsa syscall.Sockaddr
for {
if fd.closing {
return nil, os.EINVAL
}
syscall.ForkLock.RLock()
s, rsa, err = syscall.Accept(fd.sysfd)
if err != nil {
syscall.ForkLock.RUnlock()
if err == syscall.EAGAIN {
if fd.rdeadline >= 0 {
pollserver.WaitRead(fd)
continue
}
err = errTimeout
if fd.rdeadline >= 0 {
if err = pollserver.WaitRead(fd); err == nil {
continue
}
}
}
return nil, &OpError{"accept", fd.net, fd.laddr, err}
}

65
src/pkg/net/fd_windows.go
View File

@ -272,11 +272,27 @@ func (fd *netFD) connect(ra syscall.Sockaddr) error {
return syscall.Connect(fd.sysfd, ra)
}
var errClosing = errors.New("use of closed network connection")
// Add a reference to this fd.
func (fd *netFD) incref() {
// If closing==true, mark the fd as closing.
// Returns an error if the fd cannot be used.
func (fd *netFD) incref(closing bool) error {
if fd == nil {
return errClosing
}
fd.sysmu.Lock()
if fd.closing {
fd.sysmu.Unlock()
return errClosing
}
fd.sysref++
if closing {
fd.closing = true
}
closing = fd.closing
fd.sysmu.Unlock()
return nil
}
// Remove a reference to this FD and close if we've been asked to do so (and
@ -284,7 +300,17 @@ func (fd *netFD) incref() {
func (fd *netFD) decref() {
fd.sysmu.Lock()
fd.sysref--
if fd.closing && fd.sysref == 0 && fd.sysfd != syscall.InvalidHandle {
// NOTE(rsc): On Unix we check fd.sysref == 0 here before closing,
// but on Windows we have no way to wake up the blocked I/O other
// than closing the socket (or calling Shutdown, which breaks other
// programs that might have a reference to the socket). So there is
// a small race here that we might close fd.sysfd and then some other
// goroutine might start a read of fd.sysfd (having read it before we
// write InvalidHandle to it), which might refer to some other file
// if the specific handle value gets reused. I think handle values on
// Windows are not reused as aggressively as file descriptors on Unix,
// so this might be tolerable.
if fd.closing && fd.sysfd != syscall.InvalidHandle {
// In case the user has set linger, switch to blocking mode so
// the close blocks. As long as this doesn't happen often, we
// can handle the extra OS processes. Otherwise we'll need to
@ -299,13 +325,9 @@ func (fd *netFD) decref() {
}
func (fd *netFD) Close() error {
if fd == nil || fd.sysfd == syscall.InvalidHandle {
return os.EINVAL
if err := fd.incref(true); err != nil {
return err
}
fd.incref()
syscall.Shutdown(fd.sysfd, syscall.SHUT_RDWR)
fd.closing = true
fd.decref()
return nil
}
@ -350,7 +372,9 @@ func (fd *netFD) Read(buf []byte) (int, error) {
}
fd.rio.Lock()
defer fd.rio.Unlock()
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
if fd.sysfd == syscall.InvalidHandle {
return 0, os.EINVAL
@ -390,11 +414,10 @@ func (fd *netFD) ReadFrom(buf []byte) (n int, sa syscall.Sockaddr, err error) {
}
fd.rio.Lock()
defer fd.rio.Unlock()
fd.incref()
defer fd.decref()
if fd.sysfd == syscall.InvalidHandle {
return 0, nil, os.EINVAL
if err := fd.incref(false); err != nil {
return 0, nil, err
}
defer fd.decref()
var o readFromOp
o.Init(fd, buf, 'r')
o.rsan = int32(unsafe.Sizeof(o.rsa))
@ -427,11 +450,10 @@ func (fd *netFD) Write(buf []byte) (int, error) {
}
fd.wio.Lock()
defer fd.wio.Unlock()
fd.incref()
defer fd.decref()
if fd.sysfd == syscall.InvalidHandle {
return 0, os.EINVAL
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
var o writeOp
o.Init(fd, buf, 'w')
return iosrv.ExecIO(&o, fd.wdeadline)
@ -462,7 +484,9 @@ func (fd *netFD) WriteTo(buf []byte, sa syscall.Sockaddr) (int, error) {
}
fd.wio.Lock()
defer fd.wio.Unlock()
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
if fd.sysfd == syscall.InvalidHandle {
return 0, os.EINVAL
@ -493,10 +517,9 @@ func (o *acceptOp) Name() string {
}
func (fd *netFD) accept(toAddr func(syscall.Sockaddr) Addr) (*netFD, error) {
if fd == nil || fd.sysfd == syscall.InvalidHandle {
return nil, os.EINVAL
if err := fd.incref(false); err != nil {
return 0, err
}
fd.incref()
defer fd.decref()
// Get new socket.

56
src/pkg/net/net_test.go
View File

@ -10,6 +10,7 @@ import (
"regexp"
"runtime"
"testing"
"time"
)
var runErrorTest = flag.Bool("run_error_test", false, "let TestDialError check for dns errors")
@ -173,3 +174,58 @@ func TestShutdown(t *testing.T) {
t.Errorf("read = %q, want \"response\"", got)
}
}
func TestTCPListenClose(t *testing.T) {
l, err := Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("Listen failed: %v", err)
}
done := make(chan bool, 1)
go func() {
time.Sleep(100 * time.Millisecond)
l.Close()
}()
go func() {
_, err = l.Accept()
if err == nil {
t.Error("Accept succeeded")
} else {
t.Logf("Accept timeout error: %s (any error is fine)", err)
}
done <- true
}()
select {
case <-done:
case <-time.After(2 * time.Second):
t.Fatal("timeout waiting for TCP close")
}
}
func TestUDPListenClose(t *testing.T) {
l, err := ListenPacket("udp", "127.0.0.1:0")
if err != nil {
t.Fatalf("Listen failed: %v", err)
}
buf := make([]byte, 1000)
done := make(chan bool, 1)
go func() {
time.Sleep(100 * time.Millisecond)
l.Close()
}()
go func() {
_, _, err = l.ReadFrom(buf)
if err == nil {
t.Error("ReadFrom succeeded")
} else {
t.Logf("ReadFrom timeout error: %s (any error is fine)", err)
}
done <- true
}()
select {
case <-done:
case <-time.After(2 * time.Second):
t.Fatal("timeout waiting for UDP close")
}
}

9
src/pkg/net/sendfile_linux.go
View File

@ -38,7 +38,9 @@ func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) {
c.wio.Lock()
defer c.wio.Unlock()
c.incref()
if err := c.incref(false); err != nil {
return 0, err, true
}
defer c.decref()
dst := c.sysfd
@ -57,8 +59,9 @@ func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) {
break
}
if err1 == syscall.EAGAIN && c.wdeadline >= 0 {
pollserver.WaitWrite(c)
continue
if err1 = pollserver.WaitWrite(c); err1 == nil {
continue
}
}
if err1 != nil {
// This includes syscall.ENOSYS (no kernel

4
src/pkg/net/sendfile_windows.go
View File

@ -50,7 +50,9 @@ func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) {
c.wio.Lock()
defer c.wio.Unlock()
c.incref()
if err := c.incref(); err != nil {
return 0, err, true
}
defer c.decref()
var o sendfileOp

2
src/pkg/net/server_test.go
View File

@ -83,7 +83,7 @@ func connect(t *testing.T, network, addr string, isEmpty bool) {
}
// Send explicit ending for unixpacket.
// Older Linux kernels do stop reads on close.
// Older Linux kernels do not stop reads on close.
if network == "unixpacket" {
fd.Write([]byte("END"))
}

28
src/pkg/net/sockopt.go
View File

@ -105,13 +105,17 @@ done:
}
func setReadBuffer(fd *netFD, bytes int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_RCVBUF, bytes))
}
func setWriteBuffer(fd *netFD, bytes int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_SNDBUF, bytes))
}
@ -142,25 +146,33 @@ func setDeadline(fd *netFD, t time.Time) error {
}
func setReuseAddr(fd *netFD, reuse bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, boolint(reuse)))
}
func setDontRoute(fd *netFD, dontroute bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_DONTROUTE, boolint(dontroute)))
}
func setKeepAlive(fd *netFD, keepalive bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, boolint(keepalive)))
}
func setNoDelay(fd *netFD, noDelay bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_NODELAY, boolint(noDelay)))
}
@ -174,7 +186,9 @@ func setLinger(fd *netFD, sec int) error {
l.Onoff = 0
l.Linger = 0
}
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptLinger(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_LINGER, &l))
}

72
src/pkg/net/sockoptip.go
View File

@ -14,17 +14,21 @@ import (
)
func ipv4TOS(fd *netFD) (int, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TOS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
return 0, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv4TOS(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TOS, v)
if err != nil {
@ -34,17 +38,21 @@ func setIPv4TOS(fd *netFD, v int) error {
}
func ipv4TTL(fd *netFD) (int, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TTL)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
return 0, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv4TTL(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TTL, v)
if err != nil {
@ -58,7 +66,9 @@ func joinIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
if err := setIPv4MreqToInterface(mreq, ifi); err != nil {
return err
}
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_ADD_MEMBERSHIP, mreq))
}
@ -68,23 +78,29 @@ func leaveIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
if err := setIPv4MreqToInterface(mreq, ifi); err != nil {
return err
}
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_DROP_MEMBERSHIP, mreq))
}
func ipv6HopLimit(fd *netFD) (int, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
return 0, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv6HopLimit(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS, v)
if err != nil {
@ -94,7 +110,9 @@ func setIPv6HopLimit(fd *netFD, v int) error {
}
func ipv6MulticastInterface(fd *netFD) (*Interface, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return nil, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF)
if err != nil {
@ -115,7 +133,9 @@ func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
if ifi != nil {
v = ifi.Index
}
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, v)
if err != nil {
@ -125,17 +145,21 @@ func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
}
func ipv6MulticastHopLimit(fd *netFD) (int, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_HOPS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
return 0, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv6MulticastHopLimit(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_HOPS, v)
if err != nil {
@ -145,7 +169,9 @@ func setIPv6MulticastHopLimit(fd *netFD, v int) error {
}
func ipv6MulticastLoopback(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP)
if err != nil {
@ -155,7 +181,9 @@ func ipv6MulticastLoopback(fd *netFD) (bool, error) {
}
func setIPv6MulticastLoopback(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP, boolint(v))
if err != nil {
@ -170,7 +198,9 @@ func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
if ifi != nil {
mreq.Interface = uint32(ifi.Index)
}
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq))
}
@ -181,7 +211,9 @@ func leaveIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
if ifi != nil {
mreq.Interface = uint32(ifi.Index)
}
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_LEAVE_GROUP, mreq))
}

20
src/pkg/net/sockoptip_bsd.go
View File

@ -14,17 +14,21 @@ import (
)
func ipv4MulticastTTL(fd *netFD) (int, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
v, err := syscall.GetsockoptByte(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_TTL)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
return 0, os.NewSyscallError("getsockopt", err)
}
return int(v), nil
}
func setIPv4MulticastTTL(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptByte(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_TTL, byte(v))
if err != nil {
@ -34,17 +38,21 @@ func setIPv4MulticastTTL(fd *netFD, v int) error {
}
func ipv6TrafficClass(fd *netFD) (int, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
return 0, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv6TrafficClass(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, v)
if err != nil {

24
src/pkg/net/sockoptip_darwin.go
View File

@ -12,7 +12,9 @@ import (
)
func ipv4MulticastInterface(fd *netFD) (*Interface, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return nil, err
}
defer fd.decref()
a, err := syscall.GetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF)
if err != nil {
@ -28,7 +30,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
}
var x [4]byte
copy(x[:], ip.To4())
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err = syscall.SetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, x)
if err != nil {
@ -38,7 +42,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
}
func ipv4MulticastLoopback(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP)
if err != nil {
@ -48,7 +54,9 @@ func ipv4MulticastLoopback(fd *netFD) (bool, error) {
}
func setIPv4MulticastLoopback(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v))
if err != nil {
@ -58,7 +66,9 @@ func setIPv4MulticastLoopback(fd *netFD, v bool) error {
}
func ipv4ReceiveInterface(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_RECVIF)
if err != nil {
@ -68,7 +78,9 @@ func ipv4ReceiveInterface(fd *netFD) (bool, error) {
}
func setIPv4ReceiveInterface(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_RECVIF, boolint(v))
if err != nil {

24
src/pkg/net/sockoptip_freebsd.go
View File

@ -12,7 +12,9 @@ import (
)
func ipv4MulticastInterface(fd *netFD) (*Interface, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return nil, err
}
defer fd.decref()
mreq, err := syscall.GetsockoptIPMreqn(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF)
if err != nil {
@ -30,7 +32,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
v = int32(ifi.Index)
}
mreq := &syscall.IPMreqn{Ifindex: v}
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptIPMreqn(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, mreq)
if err != nil {
@ -40,7 +44,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
}
func ipv4MulticastLoopback(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP)
if err != nil {
@ -50,7 +56,9 @@ func ipv4MulticastLoopback(fd *netFD) (bool, error) {
}
func setIPv4MulticastLoopback(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v))
if err != nil {
@ -60,7 +68,9 @@ func setIPv4MulticastLoopback(fd *netFD, v bool) error {
}
func ipv4ReceiveInterface(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_RECVIF)
if err != nil {
@ -70,7 +80,9 @@ func ipv4ReceiveInterface(fd *netFD) (bool, error) {
}
func setIPv4ReceiveInterface(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_RECVIF, boolint(v))
if err != nil {

42
src/pkg/net/sockoptip_linux.go
View File

@ -12,7 +12,9 @@ import (
)
func ipv4MulticastInterface(fd *netFD) (*Interface, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return nil, err
}
defer fd.decref()
mreq, err := syscall.GetsockoptIPMreqn(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF)
if err != nil {
@ -30,7 +32,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
v = int32(ifi.Index)
}
mreq := &syscall.IPMreqn{Ifindex: v}
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptIPMreqn(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, mreq)
if err != nil {
@ -40,7 +44,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
}
func ipv4MulticastTTL(fd *netFD) (int, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_TTL)
if err != nil {
@ -50,7 +56,9 @@ func ipv4MulticastTTL(fd *netFD) (int, error) {
}
func setIPv4MulticastTTL(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_TTL, v)
if err != nil {
@ -60,7 +68,9 @@ func setIPv4MulticastTTL(fd *netFD, v int) error {
}
func ipv4MulticastLoopback(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP)
if err != nil {
@ -70,7 +80,9 @@ func ipv4MulticastLoopback(fd *netFD) (bool, error) {
}
func setIPv4MulticastLoopback(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v))
if err != nil {
@ -80,7 +92,9 @@ func setIPv4MulticastLoopback(fd *netFD, v bool) error {
}
func ipv4ReceiveInterface(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_PKTINFO)
if err != nil {
@ -90,7 +104,9 @@ func ipv4ReceiveInterface(fd *netFD) (bool, error) {
}
func setIPv4ReceiveInterface(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_PKTINFO, boolint(v))
if err != nil {
@ -100,17 +116,21 @@ func setIPv4ReceiveInterface(fd *netFD, v bool) error {
}
func ipv6TrafficClass(fd *netFD) (int, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return 0, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS)
if err != nil {
return -1, os.NewSyscallError("getsockopt", err)
return 0, os.NewSyscallError("getsockopt", err)
}
return v, nil
}
func setIPv6TrafficClass(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_TCLASS, v)
if err != nil {

24
src/pkg/net/sockoptip_openbsd.go
View File

@ -12,7 +12,9 @@ import (
)
func ipv4MulticastInterface(fd *netFD) (*Interface, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return nil, err
}
defer fd.decref()
a, err := syscall.GetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF)
if err != nil {
@ -28,7 +30,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
}
var x [4]byte
copy(x[:], ip.To4())
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err = syscall.SetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, x)
if err != nil {
@ -38,7 +42,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
}
func ipv4MulticastLoopback(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptByte(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP)
if err != nil {
@ -48,7 +54,9 @@ func ipv4MulticastLoopback(fd *netFD) (bool, error) {
}
func setIPv4MulticastLoopback(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptByte(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, byte(boolint(v)))
if err != nil {
@ -58,7 +66,9 @@ func setIPv4MulticastLoopback(fd *netFD, v bool) error {
}
func ipv4ReceiveInterface(fd *netFD) (bool, error) {
fd.incref()
if err := fd.incref(false); err != nil {
return false, err
}
defer fd.decref()
v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_RECVIF)
if err != nil {
@ -68,7 +78,9 @@ func ipv4ReceiveInterface(fd *netFD) (bool, error) {
}
func setIPv4ReceiveInterface(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_RECVIF, boolint(v))
if err != nil {

12
src/pkg/net/sockoptip_windows.go
View File

@ -23,7 +23,9 @@ func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
}
var x [4]byte
copy(x[:], ip.To4())
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err = syscall.SetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, x)
if err != nil {
@ -38,7 +40,9 @@ func ipv4MulticastTTL(fd *netFD) (int, error) {
}
func setIPv4MulticastTTL(fd *netFD, v int) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_TTL, v)
if err != nil {
@ -54,7 +58,9 @@ func ipv4MulticastLoopback(fd *netFD) (bool, error) {
}
func setIPv4MulticastLoopback(fd *netFD, v bool) error {
fd.incref()
if err := fd.incref(false); err != nil {
return err
}
defer fd.decref()
err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_LOOP, boolint(v))
if err != nil {