func (fd *netFD) dial(ctx context.Context, laddr, raddr sockaddr) error {
var err error
var lsa syscall.Sockaddr
if laddr != nil {
if lsa, err = laddr.sockaddr(fd.family); err != nil {
return err
} else if lsa != nil {
if err := syscall.Bind(fd.sysfd, lsa); err != nil {
return os.NewSyscallError("bind", err)
}
}
}
var rsa syscall.Sockaddr
if raddr != nil {
if rsa, err = raddr.sockaddr(fd.family); err != nil {
return err
}
if err := fd.connect(ctx, lsa, rsa); err != nil {
return err
}
fd.isConnected = true
} else {
if err := fd.init(); err != nil {
return err
}
}
lsa, _ = syscall.Getsockname(fd.sysfd)
if rsa, _ = syscall.Getpeername(fd.sysfd); rsa != nil {
fd.setAddr(fd.addrFunc()(lsa), fd.addrFunc()(rsa))
} else {
fd.setAddr(fd.addrFunc()(lsa), raddr)
}
return nil
}
func remoteSockname(fd *netFD, toAddr func(syscall.Sockaddr) Addr) Addr {
sa, _ := syscall.Getpeername(fd.sysfd)
if sa == nil {
return nullProtocolAddr(fd.family, fd.sotype)
}
return toAddr(sa)
}
func (fd *netFD) dial(laddr, raddr sockaddr, deadline time.Time, toAddr func(syscall.Sockaddr) Addr) error {
var err error
var lsa syscall.Sockaddr
if laddr != nil {
if lsa, err = laddr.sockaddr(fd.family); err != nil {
return err
} else if lsa != nil {
if err := syscall.Bind(fd.sysfd, lsa); err != nil {
return os.NewSyscallError("bind", err)
}
}
}
var rsa syscall.Sockaddr
if raddr != nil {
if rsa, err = raddr.sockaddr(fd.family); err != nil {
return err
}
if err := fd.connect(lsa, rsa, deadline); err != nil {
return err
}
fd.isConnected = true
} else {
if err := fd.init(); err != nil {
return err
}
}
lsa, _ = syscall.Getsockname(fd.sysfd)
if rsa, _ = syscall.Getpeername(fd.sysfd); rsa != nil {
fd.setAddr(toAddr(lsa), toAddr(rsa))
} else {
fd.setAddr(toAddr(lsa), raddr)
}
return nil
}
// Generic socket creation.
func socket(net string, f, t, p int, ipv6only bool, ulsa, ursa syscall.Sockaddr, deadline time.Time, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err error) {
// See ../syscall/exec_unix.go for description of ForkLock.
syscall.ForkLock.RLock()
s, err := syscall.Socket(f, t, p)
if err != nil {
syscall.ForkLock.RUnlock()
return nil, err
}
syscall.CloseOnExec(s)
syscall.ForkLock.RUnlock()
if err = setDefaultSockopts(s, f, t, ipv6only); err != nil {
closesocket(s)
return nil, err
}
if ulsa != nil {
// We provide a socket that listens to a wildcard
// address with reusable UDP port when the given ulsa
// is an appropriate UDP multicast address prefix.
// This makes it possible for a single UDP listener
// to join multiple different group addresses, for
// multiple UDP listeners that listen on the same UDP
// port to join the same group address.
if ulsa, err = listenerSockaddr(s, f, ulsa, toAddr); err != nil {
closesocket(s)
return nil, err
}
if err = syscall.Bind(s, ulsa); err != nil {
closesocket(s)
return nil, err
}
}
if fd, err = newFD(s, f, t, net); err != nil {
closesocket(s)
return nil, err
}
if ursa != nil {
if !deadline.IsZero() {
fd.wdeadline = deadline.UnixNano()
}
if err = fd.connect(ursa); err != nil {
closesocket(s)
fd.Close()
return nil, err
}
fd.isConnected = true
fd.wdeadline = 0
}
lsa, _ := syscall.Getsockname(s)
laddr := toAddr(lsa)
rsa, _ := syscall.Getpeername(s)
raddr := toAddr(rsa)
fd.setAddr(laddr, raddr)
return fd, nil
}
// Generic socket creation.
func socket(net string, f, t, p int, ipv6only bool, la, ra syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err error) {
// See ../syscall/exec.go for description of ForkLock.
syscall.ForkLock.RLock()
s, err := syscall.Socket(f, t, p)
if err != nil {
syscall.ForkLock.RUnlock()
return nil, err
}
syscall.CloseOnExec(s)
syscall.ForkLock.RUnlock()
err = setDefaultSockopts(s, f, t, ipv6only)
if err != nil {
closesocket(s)
return nil, err
}
var bla syscall.Sockaddr
if la != nil {
bla, err = listenerSockaddr(s, f, la, toAddr)
if err != nil {
closesocket(s)
return nil, err
}
err = syscall.Bind(s, bla)
if err != nil {
closesocket(s)
return nil, err
}
}
if fd, err = newFD(s, f, t, net); err != nil {
closesocket(s)
return nil, err
}
if ra != nil {
if err = fd.connect(ra); err != nil {
closesocket(s)
fd.Close()
return nil, err
}
fd.isConnected = true
}
sa, _ := syscall.Getsockname(s)
var laddr Addr
if la != nil && bla != la {
laddr = toAddr(la)
} else {
laddr = toAddr(sa)
}
sa, _ = syscall.Getpeername(s)
raddr := toAddr(sa)
fd.setAddr(laddr, raddr)
return fd, nil
}
// Generic POSIX socket creation.
func socket(net string, f, t, p int, ipv6only bool, ulsa, ursa syscall.Sockaddr, deadline time.Time, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err error) {
s, err := sysSocket(f, t, p)
if err != nil {
return nil, err
}
if err = setDefaultSockopts(s, f, t, ipv6only); err != nil {
closesocket(s)
return nil, err
}
if ulsa != nil {
// We provide a socket that listens to a wildcard
// address with reusable UDP port when the given ulsa
// is an appropriate UDP multicast address prefix.
// This makes it possible for a single UDP listener
// to join multiple different group addresses, for
// multiple UDP listeners that listen on the same UDP
// port to join the same group address.
if ulsa, err = listenerSockaddr(s, f, ulsa, toAddr); err != nil {
closesocket(s)
return nil, err
}
if err = syscall.Bind(s, ulsa); err != nil {
closesocket(s)
return nil, err
}
}
if fd, err = newFD(s, f, t, net); err != nil {
closesocket(s)
return nil, err
}
if ursa != nil {
if !deadline.IsZero() {
setWriteDeadline(fd, deadline)
}
if err = fd.connect(ursa); err != nil {
closesocket(s)
return nil, err
}
fd.isConnected = true
if !deadline.IsZero() {
setWriteDeadline(fd, time.Time{})
}
}
lsa, _ := syscall.Getsockname(s)
laddr := toAddr(lsa)
rsa, _ := syscall.Getpeername(s)
raddr := toAddr(rsa)
fd.setAddr(laddr, raddr)
if fd.raddr == nil {
fd.raddr = toAddr(ursa)
}
return fd, nil
}
func newFileFD(f *os.File) (*netFD, error) {
syscall.ForkLock.RLock()
fd, err := syscall.Dup(int(f.Fd()))
if err != nil {
syscall.ForkLock.RUnlock()
return nil, os.NewSyscallError("dup", err)
}
syscall.CloseOnExec(fd)
syscall.ForkLock.RUnlock()
sotype, err := syscall.GetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_TYPE)
if err != nil {
closesocket(fd)
return nil, os.NewSyscallError("getsockopt", err)
}
family := syscall.AF_UNSPEC
toAddr := sockaddrToTCP
sa, _ := syscall.Getsockname(fd)
switch sa.(type) {
default:
closesocket(fd)
return nil, syscall.EINVAL
case *syscall.SockaddrInet4:
family = syscall.AF_INET
if sotype == syscall.SOCK_DGRAM {
toAddr = sockaddrToUDP
} else if sotype == syscall.SOCK_RAW {
toAddr = sockaddrToIP
}
case *syscall.SockaddrInet6:
family = syscall.AF_INET6
if sotype == syscall.SOCK_DGRAM {
toAddr = sockaddrToUDP
} else if sotype == syscall.SOCK_RAW {
toAddr = sockaddrToIP
}
case *syscall.SockaddrUnix:
family = syscall.AF_UNIX
toAddr = sockaddrToUnix
if sotype == syscall.SOCK_DGRAM {
toAddr = sockaddrToUnixgram
} else if sotype == syscall.SOCK_SEQPACKET {
toAddr = sockaddrToUnixpacket
}
}
laddr := toAddr(sa)
sa, _ = syscall.Getpeername(fd)
raddr := toAddr(sa)
netfd, err := newFD(fd, family, sotype, laddr.Network())
if err != nil {
closesocket(fd)
return nil, err
}
netfd.setAddr(laddr, raddr)
return netfd, nil
}
func newFileFD(f *os.File, sa SocketAddr) (*netFD, error) {
s, err := dupSocket(f)
if err != nil {
return nil, err
}
var laddr, raddr Addr
var fd *netFD
if sa != nil {
lsa := make([]byte, syscall.SizeofSockaddrAny)
if err := unix.Getsockname(s, lsa); err != nil {
lsa = nil
}
rsa := make([]byte, syscall.SizeofSockaddrAny)
if err := unix.Getpeername(s, rsa); err != nil {
rsa = nil
}
laddr = sa.Addr(lsa)
raddr = sa.Addr(rsa)
fd, err = newFD(s, -1, -1, laddr.Network())
} else {
family := syscall.AF_UNSPEC
var sotype int
sotype, err = syscall.GetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_TYPE)
if err != nil {
closeFunc(s)
return nil, os.NewSyscallError("getsockopt", err)
}
lsa, _ := syscall.Getsockname(s)
rsa, _ := syscall.Getpeername(s)
switch lsa.(type) {
case *syscall.SockaddrInet4:
family = syscall.AF_INET
case *syscall.SockaddrInet6:
family = syscall.AF_INET6
case *syscall.SockaddrUnix:
family = syscall.AF_UNIX
default:
closeFunc(s)
return nil, syscall.EPROTONOSUPPORT
}
fd, err = newFD(s, family, sotype, "")
laddr = fd.addrFunc()(lsa)
raddr = fd.addrFunc()(rsa)
fd.net = laddr.Network()
}
if err != nil {
closeFunc(s)
return nil, err
}
if err := fd.init(); err != nil {
fd.Close()
return nil, err
}
fd.setAddr(laddr, raddr)
return fd, nil
}
func (sl *stdioConn) RemoteAddr() net.Addr {
sa, _ := syscall.Getpeername(int(os.Stdin.Fd()))
switch sa := sa.(type) {
case *syscall.SockaddrInet4:
return &net.IPAddr{sa.Addr[0:]}
case *syscall.SockaddrInet6:
return &net.IPAddr{sa.Addr[0:]}
}
return sl.LocalAddr()
}
// Generic socket creation.
func socket(net string, f, p, t int, la, ra syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err os.Error) {
// See ../syscall/exec.go for description of ForkLock.
syscall.ForkLock.RLock()
s, e := syscall.Socket(f, p, t)
if e != 0 {
syscall.ForkLock.RUnlock()
return nil, os.Errno(e)
}
syscall.CloseOnExec(s)
syscall.ForkLock.RUnlock()
// Allow reuse of recently-used addresses.
syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
// Allow broadcast.
syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1)
if f == syscall.AF_INET6 {
// using ip, tcp, udp, etc.
// allow both protocols even if the OS default is otherwise.
syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, 0)
}
if la != nil {
e = syscall.Bind(s, la)
if e != 0 {
closesocket(s)
return nil, os.Errno(e)
}
}
if ra != nil {
e = syscall.Connect(s, ra)
for e == syscall.EINTR {
e = syscall.Connect(s, ra)
}
if e != 0 {
closesocket(s)
return nil, os.Errno(e)
}
}
sa, _ := syscall.Getsockname(s)
laddr := toAddr(sa)
sa, _ = syscall.Getpeername(s)
raddr := toAddr(sa)
fd, err = newFD(s, f, p, net, laddr, raddr)
if err != nil {
closesocket(s)
return nil, err
}
return fd, nil
}
func newFileFD(f *os.File) (nfd *netFD, err error) {
fd, errno := syscall.Dup(f.Fd())
if errno != 0 {
return nil, os.NewSyscallError("dup", errno)
}
proto, errno := syscall.GetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_TYPE)
if errno != 0 {
return nil, os.NewSyscallError("getsockopt", errno)
}
family := syscall.AF_UNSPEC
toAddr := sockaddrToTCP
sa, _ := syscall.Getsockname(fd)
switch sa.(type) {
default:
closesocket(fd)
return nil, os.EINVAL
case *syscall.SockaddrInet4:
family = syscall.AF_INET
if proto == syscall.SOCK_DGRAM {
toAddr = sockaddrToUDP
} else if proto == syscall.SOCK_RAW {
toAddr = sockaddrToIP
}
case *syscall.SockaddrInet6:
family = syscall.AF_INET6
if proto == syscall.SOCK_DGRAM {
toAddr = sockaddrToUDP
} else if proto == syscall.SOCK_RAW {
toAddr = sockaddrToIP
}
case *syscall.SockaddrUnix:
family = syscall.AF_UNIX
toAddr = sockaddrToUnix
if proto == syscall.SOCK_DGRAM {
toAddr = sockaddrToUnixgram
} else if proto == syscall.SOCK_SEQPACKET {
toAddr = sockaddrToUnixpacket
}
}
laddr := toAddr(sa)
sa, _ = syscall.Getpeername(fd)
raddr := toAddr(sa)
if nfd, err = newFD(fd, family, proto, laddr.Network()); err != nil {
return nil, err
}
nfd.setAddr(laddr, raddr)
return nfd, nil
}
// Generic socket creation.
func socket(net string, f, p, t int, la, ra syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err os.Error) {
// See ../syscall/exec.go for description of ForkLock.
syscall.ForkLock.RLock()
s, e := syscall.Socket(f, p, t)
if e != 0 {
syscall.ForkLock.RUnlock()
return nil, os.Errno(e)
}
syscall.CloseOnExec(s)
syscall.ForkLock.RUnlock()
// Allow reuse of recently-used addresses.
syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
// Allow broadcast.
syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1)
if la != nil {
e = syscall.Bind(s, la)
if e != 0 {
syscall.Close(s)
return nil, os.Errno(e)
}
}
if ra != nil {
e = syscall.Connect(s, ra)
if e != 0 {
syscall.Close(s)
return nil, os.Errno(e)
}
}
sa, _ := syscall.Getsockname(s)
laddr := toAddr(sa)
sa, _ = syscall.Getpeername(s)
raddr := toAddr(sa)
fd, err = newFD(s, f, p, net, laddr, raddr)
if err != nil {
syscall.Close(s)
return nil, err
}
return fd, nil
}
func getip(fd int, remote bool) (ip []byte, port int, ok bool) {
// No attempt at error reporting because
// there are no possible errors, and the
// caller won't report them anyway.
var sa syscall.Sockaddr
if remote {
sa, _ = syscall.Getpeername(fd)
} else {
sa, _ = syscall.Getsockname(fd)
}
switch sa := sa.(type) {
case *syscall.SockaddrInet4:
return &sa.Addr, sa.Port, true
case *syscall.SockaddrInet6:
return &sa.Addr, sa.Port, true
}
return
}
// Generic socket creation.
func socket(net string, f, p, t int, la, ra syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err os.Error) {
// See ../syscall/exec.go for description of ForkLock.
syscall.ForkLock.RLock()
s, e := syscall.Socket(f, p, t)
if e != 0 {
syscall.ForkLock.RUnlock()
return nil, os.Errno(e)
}
syscall.CloseOnExec(s)
syscall.ForkLock.RUnlock()
setKernelSpecificSockopt(s, f)
if la != nil {
e = syscall.Bind(s, la)
if e != 0 {
closesocket(s)
return nil, os.Errno(e)
}
}
if fd, err = newFD(s, f, p, net); err != nil {
closesocket(s)
return nil, err
}
if ra != nil {
if err = fd.connect(ra); err != nil {
fd.sysfd = -1
closesocket(s)
return nil, err
}
}
sa, _ := syscall.Getsockname(s)
laddr := toAddr(sa)
sa, _ = syscall.Getpeername(s)
raddr := toAddr(sa)
fd.setAddr(laddr, raddr)
return fd, nil
}
func newFileFD(f *os.File) (*netFD, error) {
s, err := dupSocket(f)
if err != nil {
return nil, err
}
family := syscall.AF_UNSPEC
sotype, err := syscall.GetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_TYPE)
if err != nil {
closeFunc(s)
return nil, os.NewSyscallError("getsockopt", err)
}
lsa, _ := syscall.Getsockname(s)
rsa, _ := syscall.Getpeername(s)
switch lsa.(type) {
case *syscall.SockaddrInet4:
family = syscall.AF_INET
case *syscall.SockaddrInet6:
family = syscall.AF_INET6
case *syscall.SockaddrUnix:
family = syscall.AF_UNIX
default:
closeFunc(s)
return nil, syscall.EPROTONOSUPPORT
}
fd, err := newFD(s, family, sotype, "")
if err != nil {
closeFunc(s)
return nil, err
}
laddr := fd.addrFunc()(lsa)
raddr := fd.addrFunc()(rsa)
fd.net = laddr.Network()
if err := fd.init(); err != nil {
fd.Close()
return nil, err
}
fd.setAddr(laddr, raddr)
return fd, nil
}
// dialTCP dials a TCP connection to the specified host and sets marking on the
// socket. The host must be given as an IP address. A mark of zero results in a
// normal (non-marked) connection.
func dialTCP(network, addr string, timeout time.Duration, mark int) (nc net.Conn, err error) {
host, port, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
}
ip := net.ParseIP(host)
if ip == nil {
return nil, fmt.Errorf("invalid IP address %q", host)
}
p, err := strconv.ParseUint(port, 10, 16)
if err != nil {
return nil, fmt.Errorf("invalid port number %q", port)
}
var domain int
var rsa syscall.Sockaddr
switch network {
case "tcp4":
domain = syscall.AF_INET
if ip.To4() == nil {
return nil, fmt.Errorf("invalid IPv4 address %q", host)
}
sa := &syscall.SockaddrInet4{Port: int(p)}
copy(sa.Addr[:], ip.To4())
rsa = sa
case "tcp6":
domain = syscall.AF_INET6
if ip.To4() != nil {
return nil, fmt.Errorf("invalid IPv6 address %q", host)
}
sa := &syscall.SockaddrInet6{Port: int(p)}
copy(sa.Addr[:], ip.To16())
rsa = sa
default:
return nil, fmt.Errorf("unsupported network %q", network)
}
c := &conn{}
defer func() {
if err != nil {
c.Close()
}
}()
c.fd, err = syscall.Socket(domain, syscall.SOCK_STREAM|syscall.SOCK_CLOEXEC, 0)
if err != nil {
return nil, os.NewSyscallError("socket", err)
}
if mark != 0 {
if err := setSocketMark(c.fd, mark); err != nil {
return nil, err
}
}
if err := setSocketTimeout(c.fd, timeout); err != nil {
return nil, err
}
if err := syscall.Connect(c.fd, rsa); err != nil {
return nil, os.NewSyscallError("connect", err)
}
if err := setSocketTimeout(c.fd, 0); err != nil {
return nil, err
}
lsa, _ := syscall.Getsockname(c.fd)
rsa, _ = syscall.Getpeername(c.fd)
name := fmt.Sprintf("%s %s -> %s", network, sockaddrToString(lsa), sockaddrToString(rsa))
c.f = os.NewFile(uintptr(c.fd), name)
// When we call net.FileConn the socket will be made non-blocking and
// we will get a *net.TCPConn in return. The *os.File needs to be
// closed in addition to the *net.TCPConn when we're done (conn.Close
// takes care of that for us).
if c.Conn, err = net.FileConn(c.f); err != nil {
return nil, err
}
if _, ok := c.Conn.(*net.TCPConn); !ok {
return nil, fmt.Errorf("%T is not a *net.TCPConn", c.Conn)
}
return c, nil
}