/
ipc_unix.go
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/
ipc_unix.go
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// +build !windows,!nacl,!plan9
// Copyright 2018 The Mangos Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use file except in compliance with the License.
// You may obtain a copy of the license at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package ipc implements the IPC transport on top of UNIX domain sockets.
package ipc
import (
"net"
"nanomsg.org/go-mangos"
)
// options is used for shared GetOption/SetOption logic.
type options map[string]interface{}
// GetOption retrieves an option value.
func (o options) get(name string) (interface{}, error) {
if o == nil {
return nil, mangos.ErrBadOption
}
v, ok := o[name]
if !ok {
return nil, mangos.ErrBadOption
}
return v, nil
}
// SetOption sets an option. We have none, so just ErrBadOption.
func (o options) set(string, interface{}) error {
return mangos.ErrBadOption
}
type dialer struct {
addr *net.UnixAddr
sock mangos.Socket
opts options
}
// Dial implements the PipeDialer Dial method
func (d *dialer) Dial() (mangos.Pipe, error) {
conn, err := net.DialUnix("unix", nil, d.addr)
if err != nil {
return nil, err
}
return mangos.NewConnPipeIPC(conn, d.sock)
}
// SetOption implements a stub PipeDialer SetOption method.
func (d *dialer) SetOption(n string, v interface{}) error {
return d.opts.set(n, v)
}
// GetOption implements a stub PipeDialer GetOption method.
func (d *dialer) GetOption(n string) (interface{}, error) {
return d.opts.get(n)
}
type listener struct {
addr *net.UnixAddr
sock mangos.Socket
listener *net.UnixListener
opts options
}
// Listen implements the PipeListener Listen method.
func (l *listener) Listen() error {
listener, err := net.ListenUnix("unix", l.addr)
if err != nil {
return err
}
l.listener = listener
return nil
}
func (l *listener) Address() string {
return "ipc://" + l.addr.String()
}
// Accept implements the the PipeListener Accept method.
func (l *listener) Accept() (mangos.Pipe, error) {
conn, err := l.listener.AcceptUnix()
if err != nil {
return nil, err
}
return mangos.NewConnPipeIPC(conn, l.sock)
}
// Close implements the PipeListener Close method.
func (l *listener) Close() error {
l.listener.Close()
return nil
}
// SetOption implements a stub PipeListener SetOption method.
func (l *listener) SetOption(n string, v interface{}) error {
return l.opts.set(n, v)
}
// GetOption implements a stub PipeListener GetOption method.
func (l *listener) GetOption(n string) (interface{}, error) {
return l.opts.get(n)
}
type ipcTran struct{}
// Scheme implements the Transport Scheme method.
func (t *ipcTran) Scheme() string {
return "ipc"
}
// NewDialer implements the Transport NewDialer method.
func (t *ipcTran) NewDialer(addr string, sock mangos.Socket) (mangos.PipeDialer, error) {
var err error
if addr, err = mangos.StripScheme(t, addr); err != nil {
return nil, err
}
d := &dialer{sock: sock, opts: nil}
if d.addr, err = net.ResolveUnixAddr("unix", addr); err != nil {
return nil, err
}
return d, nil
}
// NewListener implements the Transport NewListener method.
func (t *ipcTran) NewListener(addr string, sock mangos.Socket) (mangos.PipeListener, error) {
var err error
l := &listener{sock: sock}
if addr, err = mangos.StripScheme(t, addr); err != nil {
return nil, err
}
if l.addr, err = net.ResolveUnixAddr("unix", addr); err != nil {
return nil, err
}
return l, nil
}
// NewTransport allocates a new IPC transport.
func NewTransport() mangos.Transport {
return &ipcTran{}
}