diff options
Diffstat (limited to 'libgo/go/net/tcpsock_plan9.go')
-rw-r--r-- | libgo/go/net/tcpsock_plan9.go | 211 |
1 files changed, 27 insertions, 184 deletions
diff --git a/libgo/go/net/tcpsock_plan9.go b/libgo/go/net/tcpsock_plan9.go index afccbfe8a7..d2860607f8 100644 --- a/libgo/go/net/tcpsock_plan9.go +++ b/libgo/go/net/tcpsock_plan9.go @@ -1,230 +1,73 @@ -// Copyright 2009 The Go Authors. All rights reserved. +// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package net import ( + "context" "io" "os" - "syscall" - "time" ) -// TCPConn is an implementation of the Conn interface for TCP network -// connections. -type TCPConn struct { - conn +func (c *TCPConn) readFrom(r io.Reader) (int64, error) { + return genericReadFrom(c, r) } -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} +func dialTCP(ctx context.Context, net string, laddr, raddr *TCPAddr) (*TCPConn, error) { + if testHookDialTCP != nil { + return testHookDialTCP(ctx, net, laddr, raddr) } - 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) + return doDialTCP(ctx, net, laddr, raddr) } -func dialTCP(net string, laddr, raddr *TCPAddr, deadline time.Time, cancel <-chan struct{}) (*TCPConn, error) { - if !deadline.IsZero() { - panic("net.dialTCP: deadline not implemented on Plan 9") - } - // TODO(bradfitz,0intro): also use the cancel channel. +func doDialTCP(ctx context.Context, 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)} + 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) + fd, err := dialPlan9(ctx, net, laddr, raddr) if err != nil { return nil, err } 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 +func (ln *TCPListener) close() error { + if _, err := ln.fd.ctl.WriteString("hangup"); err != nil { + ln.fd.ctl.Close() + return err } - 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 - } - 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(ctx context.Context, network string, laddr *TCPAddr) (*TCPListener, error) { + fd, err := listenPlan9(ctx, network, laddr) if err != nil { return nil, err } |