88 lines
1.2 KiB
Go
88 lines
1.2 KiB
Go
package testconn
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/*
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Copyright (c) 2022, John David Lee
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All rights reserved.
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This source code is licensed under the BSD-style license found in the
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LICENSE file in the root directory of this source tree.
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*/
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import (
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"net"
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"sync"
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"time"
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)
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type Network struct {
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lock sync.Mutex
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// Current connections.
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cConn net.Conn
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sConn net.Conn
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acceptQ chan net.Conn
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}
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func NewNetwork() *Network {
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return &Network{
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acceptQ: make(chan net.Conn, 1),
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}
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}
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func (n *Network) Dial() net.Conn {
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cc, sc := net.Pipe()
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func() {
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n.lock.Lock()
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defer n.lock.Unlock()
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if n.cConn != nil {
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n.cConn.Close()
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n.cConn = nil
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}
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select {
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case n.acceptQ <- sc:
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n.cConn = cc
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default:
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cc = nil
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}
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}()
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return cc
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}
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func (n *Network) Accept() net.Conn {
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var sc net.Conn
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select {
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case sc = <-n.acceptQ:
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case <-time.After(time.Second):
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return nil
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}
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func() {
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n.lock.Lock()
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defer n.lock.Unlock()
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if n.sConn != nil {
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n.sConn.Close()
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n.sConn = nil
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}
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n.sConn = sc
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}()
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return sc
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}
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func (n *Network) CloseClient() {
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n.lock.Lock()
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defer n.lock.Unlock()
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if n.cConn != nil {
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n.cConn.Close()
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n.cConn = nil
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}
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}
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func (n *Network) CloseServer() {
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n.lock.Lock()
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defer n.lock.Unlock()
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if n.sConn != nil {
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n.sConn.Close()
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n.sConn = nil
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}
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}
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