return nil, &OpError{Op: "dial", Net: ctx.network, Source: la, Addr: ra, Err: &AddrError{Err: "unexpected address type", Addr: ctx.address}}
}
if err != nil {
- return nil, err // c is non-nil interface containing nil pointer
+ return nil, &OpError{Op: "dial", Net: ctx.network, Source: la, Addr: ra, Err: err} // c is non-nil interface containing nil pointer
}
return c, nil
}
case *os.SyscallError:
nestedErr = err.Err
goto third
+ case *os.PathError: // for Plan 9
+ nestedErr = err.Err
+ goto third
}
switch nestedErr {
case errCanceled, errClosing, errMissingAddress:
case *os.SyscallError:
nestedErr = err.Err
goto third
+ case *os.PathError: // for Plan 9
+ nestedErr = err.Err
+ goto third
}
switch nestedErr {
case errClosing, errTimeout:
// netProto, which must be "ip", "ip4", or "ip6" followed by a colon
// and a protocol number or name.
func DialIP(netProto string, laddr, raddr *IPAddr) (*IPConn, error) {
- return dialIP(netProto, laddr, raddr, noDeadline)
+ c, err := dialIP(netProto, laddr, raddr, noDeadline)
+ if err != nil {
+ return nil, &OpError{Op: "dial", Net: netProto, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ }
+ return c, nil
}
func dialIP(netProto string, laddr, raddr *IPAddr, deadline time.Time) (*IPConn, error) {
net, proto, err := parseNetwork(netProto)
if err != nil {
- return nil, &OpError{Op: "dial", Net: netProto, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ return nil, err
}
switch net {
case "ip", "ip4", "ip6":
default:
- return nil, &OpError{Op: "dial", Net: netProto, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: UnknownNetworkError(netProto)}
+ return nil, UnknownNetworkError(netProto)
}
if raddr == nil {
- return nil, &OpError{Op: "dial", Net: netProto, Source: laddr.opAddr(), Addr: nil, Err: errMissingAddress}
+ return nil, errMissingAddress
}
fd, err := internetSocket(net, laddr, raddr, deadline, syscall.SOCK_RAW, proto, "dial", noCancel)
if err != nil {
- return nil, &OpError{Op: "dial", Net: netProto, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ return nil, err
}
return newIPConn(fd), nil
}
defer func() { netErr(err) }()
f, dest, proto, name, err := startPlan9(net, raddr)
if err != nil {
- return nil, &OpError{Op: "dial", Net: net, Source: laddr, Addr: raddr, Err: err}
+ return nil, err
}
_, err = f.WriteString("connect " + dest)
if err != nil {
f.Close()
- return nil, &OpError{Op: "dial", Net: f.Name(), Source: laddr, Addr: raddr, Err: err}
+ return nil, err
}
data, err := os.OpenFile(netdir+"/"+proto+"/"+name+"/data", os.O_RDWR, 0)
if err != nil {
f.Close()
- return nil, &OpError{Op: "dial", Net: net, Source: laddr, Addr: raddr, Err: err}
+ return nil, err
}
laddr, err = readPlan9Addr(proto, netdir+"/"+proto+"/"+name+"/local")
if err != nil {
data.Close()
f.Close()
- return nil, &OpError{Op: "dial", Net: proto, Source: laddr, Addr: raddr, Err: err}
+ return nil, err
}
return newFD(proto, name, f, data, laddr, raddr)
}
defer func() { netErr(err) }()
f, dest, proto, name, err := startPlan9(net, laddr)
if err != nil {
- return nil, &OpError{Op: "listen", Net: net, Source: nil, Addr: laddr, Err: err}
+ return nil, err
}
_, err = f.WriteString("announce " + dest)
if err != nil {
f.Close()
- return nil, &OpError{Op: "announce", Net: proto, Source: nil, Addr: laddr, Err: err}
+ return nil, err
}
laddr, err = readPlan9Addr(proto, netdir+"/"+proto+"/"+name+"/local")
if err != nil {
f.Close()
- return nil, &OpError{Op: "listen", Net: net, Source: nil, Addr: laddr, Err: err}
+ return nil, err
}
return newFD(proto, name, f, nil, laddr, nil)
}
defer fd.readUnlock()
f, err := os.Open(fd.dir + "/listen")
if err != nil {
- return nil, &OpError{Op: "accept", Net: fd.dir + "/listen", Source: nil, Addr: fd.laddr, Err: err}
+ return nil, err
}
var buf [16]byte
n, err := f.Read(buf[:])
if err != nil {
f.Close()
- return nil, &OpError{Op: "accept", Net: fd.dir + "/listen", Source: nil, Addr: fd.laddr, Err: err}
+ return nil, err
}
name := string(buf[:n])
data, err := os.OpenFile(netdir+"/"+fd.net+"/"+name+"/data", os.O_RDWR, 0)
if err != nil {
f.Close()
- return nil, &OpError{Op: "accept", Net: fd.net, Source: nil, Addr: fd.laddr, Err: err}
+ return nil, err
}
raddr, err := readPlan9Addr(fd.net, netdir+"/"+fd.net+"/"+name+"/remote")
if err != nil {
data.Close()
f.Close()
- return nil, &OpError{Op: "accept", Net: fd.net, Source: nil, Addr: fd.laddr, Err: err}
+ return nil, err
}
return newFD(fd.net, name, f, data, fd.laddr, raddr)
}
package net
+import "syscall"
+
func setKeepAlive(fd *netFD, keepalive bool) error {
if keepalive {
_, e := fd.ctl.WriteAt([]byte("keepalive"), 0)
}
return nil
}
+
+func setLinger(fd *netFD, sec int) error {
+ return syscall.EPLAN9
+}
package net
+import (
+ "io"
+ "os"
+ "syscall"
+ "time"
+)
+
// TCPAddr represents the address of a TCP end point.
type TCPAddr struct {
IP IP
}
return addrs.first(isIPv4).(*TCPAddr), nil
}
+
+// TCPConn is an implementation of the Conn interface for TCP network
+// connections.
+type TCPConn struct {
+ conn
+}
+
+// ReadFrom implements the io.ReaderFrom ReadFrom method.
+func (c *TCPConn) ReadFrom(r io.Reader) (int64, error) {
+ if !c.ok() {
+ return 0, syscall.EINVAL
+ }
+ n, err := c.readFrom(r)
+ if err != nil && err != io.EOF {
+ err = &OpError{Op: "read", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+ }
+ return n, err
+}
+
+// CloseRead shuts down the reading side of the TCP connection.
+// Most callers should just use Close.
+func (c *TCPConn) CloseRead() error {
+ if !c.ok() {
+ return syscall.EINVAL
+ }
+ if err := c.fd.closeRead(); err != nil {
+ return &OpError{Op: "close", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+ }
+ return nil
+}
+
+// CloseWrite shuts down the writing side of the TCP connection.
+// Most callers should just use Close.
+func (c *TCPConn) CloseWrite() error {
+ if !c.ok() {
+ return syscall.EINVAL
+ }
+ if err := c.fd.closeWrite(); err != nil {
+ return &OpError{Op: "close", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+ }
+ return nil
+}
+
+// SetLinger sets the behavior of Close on a connection which still
+// has data waiting to be sent or to be acknowledged.
+//
+// If sec < 0 (the default), the operating system finishes sending the
+// data in the background.
+//
+// If sec == 0, the operating system discards any unsent or
+// unacknowledged data.
+//
+// If sec > 0, the data is sent in the background as with sec < 0. On
+// some operating systems after sec seconds have elapsed any remaining
+// unsent data may be discarded.
+func (c *TCPConn) SetLinger(sec int) error {
+ if !c.ok() {
+ return syscall.EINVAL
+ }
+ if err := setLinger(c.fd, sec); err != nil {
+ return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+ }
+ return nil
+}
+
+// SetKeepAlive sets whether the operating system should send
+// keepalive messages on the connection.
+func (c *TCPConn) SetKeepAlive(keepalive bool) error {
+ if !c.ok() {
+ return syscall.EINVAL
+ }
+ if err := setKeepAlive(c.fd, keepalive); err != nil {
+ return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+ }
+ return nil
+}
+
+// SetKeepAlivePeriod sets period between keep alives.
+func (c *TCPConn) SetKeepAlivePeriod(d time.Duration) error {
+ if !c.ok() {
+ return syscall.EINVAL
+ }
+ if err := setKeepAlivePeriod(c.fd, d); err != nil {
+ return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+ }
+ return nil
+}
+
+// SetNoDelay controls whether the operating system should delay
+// packet transmission in hopes of sending fewer packets (Nagle's
+// algorithm). The default is true (no delay), meaning that data is
+// sent as soon as possible after a Write.
+func (c *TCPConn) SetNoDelay(noDelay bool) error {
+ if !c.ok() {
+ return syscall.EINVAL
+ }
+ if err := setNoDelay(c.fd, noDelay); err != nil {
+ return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
+ }
+ return nil
+}
+
+func newTCPConn(fd *netFD) *TCPConn {
+ c := &TCPConn{conn{fd}}
+ setNoDelay(c.fd, true)
+ return c
+}
+
+// DialTCP connects to the remote address raddr on the network net,
+// which must be "tcp", "tcp4", or "tcp6". If laddr is not nil, it is
+// used as the local address for the connection.
+func DialTCP(net string, laddr, raddr *TCPAddr) (*TCPConn, error) {
+ switch net {
+ case "tcp", "tcp4", "tcp6":
+ default:
+ return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: UnknownNetworkError(net)}
+ }
+ if raddr == nil {
+ return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: nil, Err: errMissingAddress}
+ }
+ c, err := dialTCP(net, laddr, raddr, noDeadline, noCancel)
+ if err != nil {
+ return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ }
+ return c, nil
+}
+
+// TCPListener is a TCP network listener. Clients should typically
+// use variables of type Listener instead of assuming TCP.
+type TCPListener struct {
+ fd *netFD
+}
+
+// AcceptTCP accepts the next incoming call and returns the new
+// connection.
+func (l *TCPListener) AcceptTCP() (*TCPConn, error) {
+ if !l.ok() {
+ return nil, syscall.EINVAL
+ }
+ c, err := l.accept()
+ if err != nil {
+ return nil, &OpError{Op: "accept", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
+ }
+ return c, nil
+}
+
+// Accept implements the Accept method in the Listener interface; it
+// waits for the next call and returns a generic Conn.
+func (l *TCPListener) Accept() (Conn, error) {
+ if !l.ok() {
+ return nil, syscall.EINVAL
+ }
+ c, err := l.accept()
+ if err != nil {
+ return nil, &OpError{Op: "accept", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
+ }
+ return c, nil
+}
+
+// Close stops listening on the TCP address.
+// Already Accepted connections are not closed.
+func (l *TCPListener) Close() error {
+ if !l.ok() {
+ return syscall.EINVAL
+ }
+ if err := l.close(); err != nil {
+ return &OpError{Op: "close", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
+ }
+ return nil
+}
+
+// Addr returns the listener's network address, a *TCPAddr.
+// The Addr returned is shared by all invocations of Addr, so
+// do not modify it.
+func (l *TCPListener) Addr() Addr { return l.fd.laddr }
+
+// SetDeadline sets the deadline associated with the listener.
+// A zero time value disables the deadline.
+func (l *TCPListener) SetDeadline(t time.Time) error {
+ if !l.ok() {
+ return syscall.EINVAL
+ }
+ if err := l.fd.setDeadline(t); err != nil {
+ return &OpError{Op: "set", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
+ }
+ return nil
+}
+
+// File returns a copy of the underlying os.File, set to blocking
+// mode. It is the caller's responsibility to close f when finished.
+// Closing l does not affect f, and closing f does not affect l.
+//
+// The returned os.File's file descriptor is different from the
+// connection's. Attempting to change properties of the original
+// using this duplicate may or may not have the desired effect.
+func (l *TCPListener) File() (f *os.File, err error) {
+ if !l.ok() {
+ return nil, syscall.EINVAL
+ }
+ f, err = l.file()
+ if err != nil {
+ return nil, &OpError{Op: "file", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
+ }
+ return
+}
+
+// ListenTCP announces on the TCP address laddr and returns a TCP
+// listener. Net must be "tcp", "tcp4", or "tcp6". If laddr has a
+// port of 0, ListenTCP will choose an available port. The caller can
+// use the Addr method of TCPListener to retrieve the chosen address.
+func ListenTCP(net string, laddr *TCPAddr) (*TCPListener, error) {
+ switch net {
+ case "tcp", "tcp4", "tcp6":
+ default:
+ return nil, &OpError{Op: "listen", Net: net, Source: nil, Addr: laddr.opAddr(), Err: UnknownNetworkError(net)}
+ }
+ if laddr == nil {
+ laddr = &TCPAddr{}
+ }
+ ln, err := listenTCP(net, laddr)
+ if err != nil {
+ return nil, &OpError{Op: "listen", Net: net, Source: nil, Addr: laddr.opAddr(), Err: err}
+ }
+ return ln, nil
+}
import (
"io"
"os"
- "syscall"
"time"
)
-// TCPConn is an implementation of the Conn interface for TCP network
-// connections.
-type TCPConn struct {
- conn
-}
-
-func newTCPConn(fd *netFD) *TCPConn {
- return &TCPConn{conn{fd}}
-}
-
-// ReadFrom implements the io.ReaderFrom ReadFrom method.
-func (c *TCPConn) ReadFrom(r io.Reader) (int64, error) {
- n, err := genericReadFrom(c, r)
- if err != nil && err != io.EOF {
- err = &OpError{Op: "read", Net: c.fd.dir, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return n, err
-}
-
-// CloseRead shuts down the reading side of the TCP connection.
-// Most callers should just use Close.
-func (c *TCPConn) CloseRead() error {
- if !c.ok() {
- return syscall.EINVAL
- }
- err := c.fd.closeRead()
- if err != nil {
- err = &OpError{Op: "close", Net: c.fd.dir, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return err
-}
-
-// CloseWrite shuts down the writing side of the TCP connection.
-// Most callers should just use Close.
-func (c *TCPConn) CloseWrite() error {
- if !c.ok() {
- return syscall.EINVAL
- }
- err := c.fd.closeWrite()
- if err != nil {
- err = &OpError{Op: "close", Net: c.fd.dir, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return err
-}
-
-// SetLinger sets the behavior of Close on a connection which still
-// has data waiting to be sent or to be acknowledged.
-//
-// If sec < 0 (the default), the operating system finishes sending the
-// data in the background.
-//
-// If sec == 0, the operating system discards any unsent or
-// unacknowledged data.
-//
-// If sec > 0, the data is sent in the background as with sec < 0. On
-// some operating systems after sec seconds have elapsed any remaining
-// unsent data may be discarded.
-func (c *TCPConn) SetLinger(sec int) error {
- return &OpError{Op: "set", Net: c.fd.dir, Source: c.fd.laddr, Addr: c.fd.raddr, Err: syscall.EPLAN9}
-}
-
-// SetKeepAlive sets whether the operating system should send
-// keepalive messages on the connection.
-func (c *TCPConn) SetKeepAlive(keepalive bool) error {
- if !c.ok() {
- return syscall.EPLAN9
- }
- if err := setKeepAlive(c.fd, keepalive); err != nil {
- return &OpError{Op: "set", Net: c.fd.dir, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return nil
-}
-
-// SetKeepAlivePeriod sets period between keep alives.
-func (c *TCPConn) SetKeepAlivePeriod(d time.Duration) error {
- if !c.ok() {
- return syscall.EPLAN9
- }
- if err := setKeepAlivePeriod(c.fd, d); err != nil {
- return &OpError{Op: "set", Net: c.fd.dir, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return nil
-}
-
-// SetNoDelay controls whether the operating system should delay
-// packet transmission in hopes of sending fewer packets (Nagle's
-// algorithm). The default is true (no delay), meaning that data is
-// sent as soon as possible after a Write.
-func (c *TCPConn) SetNoDelay(noDelay bool) error {
- return &OpError{Op: "set", Net: c.fd.dir, Source: c.fd.laddr, Addr: c.fd.raddr, Err: syscall.EPLAN9}
-}
-
-// DialTCP connects to the remote address raddr on the network net,
-// which must be "tcp", "tcp4", or "tcp6". If laddr is not nil, it is
-// used as the local address for the connection.
-func DialTCP(net string, laddr, raddr *TCPAddr) (*TCPConn, error) {
- return dialTCP(net, laddr, raddr, noDeadline, noCancel)
+func (c *TCPConn) readFrom(r io.Reader) (int64, error) {
+ return genericReadFrom(c, r)
}
func dialTCP(net string, laddr, raddr *TCPAddr, deadline time.Time, cancel <-chan struct{}) (*TCPConn, error) {
switch net {
case "tcp", "tcp4", "tcp6":
default:
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: UnknownNetworkError(net)}
+ return nil, UnknownNetworkError(net)
}
if raddr == nil {
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: nil, Err: errMissingAddress}
+ return nil, errMissingAddress
}
fd, err := dialPlan9(net, laddr, raddr)
if err != nil {
return newTCPConn(fd), nil
}
-// TCPListener is a TCP network listener. Clients should typically
-// use variables of type Listener instead of assuming TCP.
-type TCPListener struct {
- fd *netFD
-}
+func (ln *TCPListener) ok() bool { return ln != nil && ln.fd != nil && ln.fd.ctl != nil }
-// AcceptTCP accepts the next incoming call and returns the new
-// connection.
-func (l *TCPListener) AcceptTCP() (*TCPConn, error) {
- if l == nil || l.fd == nil || l.fd.ctl == nil {
- return nil, syscall.EINVAL
- }
- fd, err := l.fd.acceptPlan9()
+func (ln *TCPListener) accept() (*TCPConn, error) {
+ fd, err := ln.fd.acceptPlan9()
if err != nil {
return nil, err
}
return newTCPConn(fd), nil
}
-// Accept implements the Accept method in the Listener interface; it
-// waits for the next call and returns a generic Conn.
-func (l *TCPListener) Accept() (Conn, error) {
- if l == nil || l.fd == nil || l.fd.ctl == nil {
- return nil, syscall.EINVAL
- }
- c, err := l.AcceptTCP()
- if err != nil {
- return nil, err
- }
- return c, nil
-}
-
-// Close stops listening on the TCP address.
-// Already Accepted connections are not closed.
-func (l *TCPListener) Close() error {
- if l == nil || l.fd == nil || l.fd.ctl == nil {
- return syscall.EINVAL
+func (ln *TCPListener) close() error {
+ if _, err := ln.fd.ctl.WriteString("hangup"); err != nil {
+ ln.fd.ctl.Close()
+ return err
}
- if _, err := l.fd.ctl.WriteString("hangup"); err != nil {
- l.fd.ctl.Close()
- return &OpError{Op: "close", Net: l.fd.dir, Source: nil, Addr: l.fd.laddr, Err: err}
- }
- err := l.fd.ctl.Close()
- if err != nil {
- err = &OpError{Op: "close", Net: l.fd.dir, Source: nil, Addr: l.fd.laddr, Err: err}
- }
- return err
-}
-
-// Addr returns the listener's network address, a *TCPAddr.
-// The Addr returned is shared by all invocations of Addr, so
-// do not modify it.
-func (l *TCPListener) Addr() Addr { return l.fd.laddr }
-
-// SetDeadline sets the deadline associated with the listener.
-// A zero time value disables the deadline.
-func (l *TCPListener) SetDeadline(t time.Time) error {
- if l == nil || l.fd == nil || l.fd.ctl == nil {
- return syscall.EINVAL
- }
- if err := l.fd.setDeadline(t); err != nil {
- return &OpError{Op: "set", Net: l.fd.dir, Source: nil, Addr: l.fd.laddr, Err: err}
+ if err := ln.fd.ctl.Close(); err != nil {
+ return err
}
return nil
}
-// File returns a copy of the underlying os.File, set to blocking
-// mode. It is the caller's responsibility to close f when finished.
-// Closing l does not affect f, and closing f does not affect l.
-//
-// The returned os.File's file descriptor is different from the
-// connection's. Attempting to change properties of the original
-// using this duplicate may or may not have the desired effect.
-func (l *TCPListener) File() (f *os.File, err error) {
- f, err = l.dup()
+func (ln *TCPListener) file() (*os.File, error) {
+ f, err := ln.dup()
if err != nil {
- err = &OpError{Op: "file", Net: l.fd.dir, Source: nil, Addr: l.fd.laddr, Err: err}
+ return nil, err
}
- return
+ return f, nil
}
-// ListenTCP announces on the TCP address laddr and returns a TCP
-// listener. Net must be "tcp", "tcp4", or "tcp6". If laddr has a
-// port of 0, ListenTCP will choose an available port. The caller can
-// use the Addr method of TCPListener to retrieve the chosen address.
-func ListenTCP(net string, laddr *TCPAddr) (*TCPListener, error) {
- switch net {
- case "tcp", "tcp4", "tcp6":
- default:
- return nil, &OpError{Op: "listen", Net: net, Source: nil, Addr: laddr.opAddr(), Err: UnknownNetworkError(net)}
- }
- if laddr == nil {
- laddr = &TCPAddr{}
- }
- fd, err := listenPlan9(net, laddr)
+func listenTCP(network string, laddr *TCPAddr) (*TCPListener, error) {
+ fd, err := listenPlan9(network, laddr)
if err != nil {
return nil, err
}
return ipToSockaddr(family, a.IP, a.Port, a.Zone)
}
-// TCPConn is an implementation of the Conn interface for TCP network
-// connections.
-type TCPConn struct {
- conn
-}
-
-func newTCPConn(fd *netFD) *TCPConn {
- c := &TCPConn{conn{fd}}
- setNoDelay(c.fd, true)
- return c
-}
-
-// ReadFrom implements the io.ReaderFrom ReadFrom method.
-func (c *TCPConn) ReadFrom(r io.Reader) (int64, error) {
+func (c *TCPConn) readFrom(r io.Reader) (int64, error) {
if n, err, handled := sendFile(c.fd, r); handled {
- if err != nil && err != io.EOF {
- err = &OpError{Op: "read", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
return n, err
}
- n, err := genericReadFrom(c, r)
- if err != nil && err != io.EOF {
- err = &OpError{Op: "read", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return n, err
-}
-
-// CloseRead shuts down the reading side of the TCP connection.
-// Most callers should just use Close.
-func (c *TCPConn) CloseRead() error {
- if !c.ok() {
- return syscall.EINVAL
- }
- err := c.fd.closeRead()
- if err != nil {
- err = &OpError{Op: "close", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return err
-}
-
-// CloseWrite shuts down the writing side of the TCP connection.
-// Most callers should just use Close.
-func (c *TCPConn) CloseWrite() error {
- if !c.ok() {
- return syscall.EINVAL
- }
- err := c.fd.closeWrite()
- if err != nil {
- err = &OpError{Op: "close", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return err
-}
-
-// SetLinger sets the behavior of Close on a connection which still
-// has data waiting to be sent or to be acknowledged.
-//
-// If sec < 0 (the default), the operating system finishes sending the
-// data in the background.
-//
-// If sec == 0, the operating system discards any unsent or
-// unacknowledged data.
-//
-// If sec > 0, the data is sent in the background as with sec < 0. On
-// some operating systems after sec seconds have elapsed any remaining
-// unsent data may be discarded.
-func (c *TCPConn) SetLinger(sec int) error {
- if !c.ok() {
- return syscall.EINVAL
- }
- if err := setLinger(c.fd, sec); err != nil {
- return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return nil
-}
-
-// SetKeepAlive sets whether the operating system should send
-// keepalive messages on the connection.
-func (c *TCPConn) SetKeepAlive(keepalive bool) error {
- if !c.ok() {
- return syscall.EINVAL
- }
- if err := setKeepAlive(c.fd, keepalive); err != nil {
- return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return nil
-}
-
-// SetKeepAlivePeriod sets period between keep alives.
-func (c *TCPConn) SetKeepAlivePeriod(d time.Duration) error {
- if !c.ok() {
- return syscall.EINVAL
- }
- if err := setKeepAlivePeriod(c.fd, d); err != nil {
- return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return nil
-}
-
-// SetNoDelay controls whether the operating system should delay
-// packet transmission in hopes of sending fewer packets (Nagle's
-// algorithm). The default is true (no delay), meaning that data is
-// sent as soon as possible after a Write.
-func (c *TCPConn) SetNoDelay(noDelay bool) error {
- if !c.ok() {
- return syscall.EINVAL
- }
- if err := setNoDelay(c.fd, noDelay); err != nil {
- return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
- }
- return nil
-}
-
-// DialTCP connects to the remote address raddr on the network net,
-// which must be "tcp", "tcp4", or "tcp6". If laddr is not nil, it is
-// used as the local address for the connection.
-func DialTCP(net string, laddr, raddr *TCPAddr) (*TCPConn, error) {
- switch net {
- case "tcp", "tcp4", "tcp6":
- default:
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: UnknownNetworkError(net)}
- }
- if raddr == nil {
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: nil, Err: errMissingAddress}
- }
- return dialTCP(net, laddr, raddr, noDeadline, noCancel)
+ return genericReadFrom(c, r)
}
func dialTCP(net string, laddr, raddr *TCPAddr, deadline time.Time, cancel <-chan struct{}) (*TCPConn, error) {
}
if err != nil {
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ return nil, err
}
return newTCPConn(fd), nil
}
return err == syscall.EADDRNOTAVAIL
}
-// TCPListener is a TCP network listener. Clients should typically
-// use variables of type Listener instead of assuming TCP.
-type TCPListener struct {
- fd *netFD
-}
+func (ln *TCPListener) ok() bool { return ln != nil && ln.fd != nil }
-// AcceptTCP accepts the next incoming call and returns the new
-// connection.
-func (l *TCPListener) AcceptTCP() (*TCPConn, error) {
- if l == nil || l.fd == nil {
- return nil, syscall.EINVAL
- }
- fd, err := l.fd.accept()
- if err != nil {
- return nil, &OpError{Op: "accept", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
- }
- return newTCPConn(fd), nil
-}
-
-// Accept implements the Accept method in the Listener interface; it
-// waits for the next call and returns a generic Conn.
-func (l *TCPListener) Accept() (Conn, error) {
- c, err := l.AcceptTCP()
+func (ln *TCPListener) accept() (*TCPConn, error) {
+ fd, err := ln.fd.accept()
if err != nil {
return nil, err
}
- return c, nil
+ return newTCPConn(fd), nil
}
-// Close stops listening on the TCP address.
-// Already Accepted connections are not closed.
-func (l *TCPListener) Close() error {
- if l == nil || l.fd == nil {
- return syscall.EINVAL
- }
- err := l.fd.Close()
- if err != nil {
- err = &OpError{Op: "close", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
- }
- return err
+func (ln *TCPListener) close() error {
+ return ln.fd.Close()
}
-// Addr returns the listener's network address, a *TCPAddr.
-// The Addr returned is shared by all invocations of Addr, so
-// do not modify it.
-func (l *TCPListener) Addr() Addr { return l.fd.laddr }
-
-// SetDeadline sets the deadline associated with the listener.
-// A zero time value disables the deadline.
-func (l *TCPListener) SetDeadline(t time.Time) error {
- if l == nil || l.fd == nil {
- return syscall.EINVAL
- }
- if err := l.fd.setDeadline(t); err != nil {
- return &OpError{Op: "set", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
- }
- return nil
-}
-
-// File returns a copy of the underlying os.File, set to blocking
-// mode. It is the caller's responsibility to close f when finished.
-// Closing l does not affect f, and closing f does not affect l.
-//
-// The returned os.File's file descriptor is different from the
-// connection's. Attempting to change properties of the original
-// using this duplicate may or may not have the desired effect.
-func (l *TCPListener) File() (f *os.File, err error) {
- f, err = l.fd.dup()
+func (ln *TCPListener) file() (*os.File, error) {
+ f, err := ln.fd.dup()
if err != nil {
- err = &OpError{Op: "file", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
+ return nil, err
}
- return
+ return f, nil
}
-// ListenTCP announces on the TCP address laddr and returns a TCP
-// listener. Net must be "tcp", "tcp4", or "tcp6". If laddr has a
-// port of 0, ListenTCP will choose an available port. The caller can
-// use the Addr method of TCPListener to retrieve the chosen address.
-func ListenTCP(net string, laddr *TCPAddr) (*TCPListener, error) {
- switch net {
- case "tcp", "tcp4", "tcp6":
- default:
- return nil, &OpError{Op: "listen", Net: net, Source: nil, Addr: laddr.opAddr(), Err: UnknownNetworkError(net)}
- }
- if laddr == nil {
- laddr = &TCPAddr{}
- }
- fd, err := internetSocket(net, laddr, nil, noDeadline, syscall.SOCK_STREAM, 0, "listen", noCancel)
+func listenTCP(network string, laddr *TCPAddr) (*TCPListener, error) {
+ fd, err := internetSocket(network, laddr, nil, noDeadline, syscall.SOCK_STREAM, 0, "listen", noCancel)
if err != nil {
- return nil, &OpError{Op: "listen", Net: net, Source: nil, Addr: laddr, Err: err}
+ return nil, err
}
return &TCPListener{fd}, nil
}
package net
import (
+ "syscall"
"time"
)
+func setNoDelay(fd *netFD, noDelay bool) error {
+ return syscall.EPLAN9
+}
+
// Set keep alive period.
func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
cmd := "keepalive " + itoa(int(d/time.Millisecond))
// which must be "udp", "udp4", or "udp6". If laddr is not nil, it is
// used as the local address for the connection.
func DialUDP(net string, laddr, raddr *UDPAddr) (*UDPConn, error) {
- return dialUDP(net, laddr, raddr, noDeadline)
+ c, err := dialUDP(net, laddr, raddr, noDeadline)
+ if err != nil {
+ return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ }
+ return c, nil
}
func dialUDP(net string, laddr, raddr *UDPAddr, deadline time.Time) (*UDPConn, error) {
switch net {
case "udp", "udp4", "udp6":
default:
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: UnknownNetworkError(net)}
+ return nil, UnknownNetworkError(net)
}
if raddr == nil {
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: nil, Err: errMissingAddress}
+ return nil, errMissingAddress
}
fd, err := dialPlan9(net, laddr, raddr)
if err != nil {
if raddr == nil {
return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: nil, Err: errMissingAddress}
}
- return dialUDP(net, laddr, raddr, noDeadline)
+ c, err := dialUDP(net, laddr, raddr, noDeadline)
+ if err != nil {
+ return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ }
+ return c, nil
}
func dialUDP(net string, laddr, raddr *UDPAddr, deadline time.Time) (*UDPConn, error) {
fd, err := internetSocket(net, laddr, raddr, deadline, syscall.SOCK_DGRAM, 0, "dial", noCancel)
if err != nil {
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ return nil, err
}
return newUDPConn(fd), nil
}
default:
return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: UnknownNetworkError(net)}
}
- return dialUnix(net, laddr, raddr, noDeadline)
+ c, err := dialUnix(net, laddr, raddr, noDeadline)
+ if err != nil {
+ return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ }
+ return c, nil
}
func dialUnix(net string, laddr, raddr *UnixAddr, deadline time.Time) (*UnixConn, error) {
fd, err := unixSocket(net, laddr, raddr, "dial", deadline)
if err != nil {
- return nil, &OpError{Op: "dial", Net: net, Source: laddr.opAddr(), Addr: raddr.opAddr(), Err: err}
+ return nil, err
}
return newUnixConn(fd), nil
}
want = append(want, []eventDesc{
{trace.EvGoBlockNet, []frame{
{"net.(*netFD).accept", 0},
- {"net.(*TCPListener).AcceptTCP", 0},
+ {"net.(*TCPListener).accept", 0},
{"net.(*TCPListener).Accept", 0},
{"runtime/trace_test.TestTraceSymbolize.func10", 86},
}},