diff options
Diffstat (limited to 'src/net/tcpsock_plan9.go')
-rw-r--r-- | src/net/tcpsock_plan9.go | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/net/tcpsock_plan9.go b/src/net/tcpsock_plan9.go new file mode 100644 index 000000000..52019d7b4 --- /dev/null +++ b/src/net/tcpsock_plan9.go @@ -0,0 +1,198 @@ +// 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 ( + "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) { + return genericReadFrom(c, r) +} + +// 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 + } + return c.fd.closeRead() +} + +// 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 + } + return c.fd.closeWrite() +} + +// 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 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 + } + return setKeepAlive(c.fd, keepalive) +} + +// SetKeepAlivePeriod sets period between keep alives. +func (c *TCPConn) SetKeepAlivePeriod(d time.Duration) error { + if !c.ok() { + return syscall.EPLAN9 + } + return setKeepAlivePeriod(c.fd, d) +} + +// 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 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) +} + +func dialTCP(net string, laddr, raddr *TCPAddr, deadline time.Time) (*TCPConn, error) { + if !deadline.IsZero() { + panic("net.dialTCP: deadline not implemented on Plan 9") + } + switch net { + case "tcp", "tcp4", "tcp6": + default: + return nil, &OpError{"dial", net, raddr, UnknownNetworkError(net)} + } + if raddr == nil { + return nil, &OpError{"dial", net, nil, errMissingAddress} + } + fd, err := dialPlan9(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 +} + +// 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() + 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 + } + if _, err := l.fd.ctl.WriteString("hangup"); err != nil { + l.fd.ctl.Close() + return &OpError{"close", l.fd.ctl.Name(), l.fd.laddr, err} + } + return l.fd.ctl.Close() +} + +// Addr returns the listener's network address, a *TCPAddr. +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 + } + return l.fd.setDeadline(t) +} + +// 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) { return l.dup() } + +// 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{"listen", net, laddr, UnknownNetworkError(net)} + } + if laddr == nil { + laddr = &TCPAddr{} + } + fd, err := listenPlan9(net, laddr) + if err != nil { + return nil, err + } + return &TCPListener{fd}, nil +} |