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// Copyright 2012 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.
// +build darwin freebsd linux netbsd openbsd windows
// Base posix socket functions.
package net
import (
"os"
"syscall"
"time"
)
type conn struct {
fd *netFD
}
func (c *conn) ok() bool { return c != nil && c.fd != nil }
// Implementation of the Conn interface - see Conn for documentation.
// Read implements the Conn Read method.
func (c *conn) Read(b []byte) (int, error) {
if !c.ok() {
return 0, syscall.EINVAL
}
return c.fd.Read(b)
}
// Write implements the Conn Write method.
func (c *conn) Write(b []byte) (int, error) {
if !c.ok() {
return 0, syscall.EINVAL
}
return c.fd.Write(b)
}
// LocalAddr returns the local network address.
func (c *conn) LocalAddr() Addr {
if !c.ok() {
return nil
}
return c.fd.laddr
}
// RemoteAddr returns the remote network address.
func (c *conn) RemoteAddr() Addr {
if !c.ok() {
return nil
}
return c.fd.raddr
}
// SetDeadline implements the Conn SetDeadline method.
func (c *conn) SetDeadline(t time.Time) error {
if !c.ok() {
return syscall.EINVAL
}
return setDeadline(c.fd, t)
}
// SetReadDeadline implements the Conn SetReadDeadline method.
func (c *conn) SetReadDeadline(t time.Time) error {
if !c.ok() {
return syscall.EINVAL
}
return setReadDeadline(c.fd, t)
}
// SetWriteDeadline implements the Conn SetWriteDeadline method.
func (c *conn) SetWriteDeadline(t time.Time) error {
if !c.ok() {
return syscall.EINVAL
}
return setWriteDeadline(c.fd, t)
}
// SetReadBuffer sets the size of the operating system's
// receive buffer associated with the connection.
func (c *conn) SetReadBuffer(bytes int) error {
if !c.ok() {
return syscall.EINVAL
}
return setReadBuffer(c.fd, bytes)
}
// SetWriteBuffer sets the size of the operating system's
// transmit buffer associated with the connection.
func (c *conn) SetWriteBuffer(bytes int) error {
if !c.ok() {
return syscall.EINVAL
}
return setWriteBuffer(c.fd, bytes)
}
// 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 c does not affect f, and closing f does not affect c.
func (c *conn) File() (f *os.File, err error) { return c.fd.dup() }
// Close closes the connection.
func (c *conn) Close() error {
if !c.ok() {
return syscall.EINVAL
}
return c.fd.Close()
}
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