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// Copyright 2013 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 "sync"
type streamListener struct {
net, addr string
ln Listener
}
type dualStackServer struct {
lnmu sync.RWMutex
lns []streamListener
port string
cmu sync.RWMutex
cs []Conn // established connections at the passive open side
}
func (dss *dualStackServer) buildup(server func(*dualStackServer, Listener)) error {
for i := range dss.lns {
go server(dss, dss.lns[i].ln)
}
return nil
}
func (dss *dualStackServer) putConn(c Conn) error {
dss.cmu.Lock()
dss.cs = append(dss.cs, c)
dss.cmu.Unlock()
return nil
}
func (dss *dualStackServer) teardownNetwork(net string) error {
dss.lnmu.Lock()
for i := range dss.lns {
if net == dss.lns[i].net && dss.lns[i].ln != nil {
dss.lns[i].ln.Close()
dss.lns[i].ln = nil
}
}
dss.lnmu.Unlock()
return nil
}
func (dss *dualStackServer) teardown() error {
dss.lnmu.Lock()
for i := range dss.lns {
if dss.lns[i].ln != nil {
dss.lns[i].ln.Close()
}
}
dss.lnmu.Unlock()
dss.cmu.Lock()
for _, c := range dss.cs {
c.Close()
}
dss.cmu.Unlock()
return nil
}
func newDualStackServer(lns []streamListener) (*dualStackServer, error) {
dss := &dualStackServer{lns: lns, port: "0"}
for i := range dss.lns {
ln, err := Listen(dss.lns[i].net, dss.lns[i].addr+":"+dss.port)
if err != nil {
dss.teardown()
return nil, err
}
dss.lns[i].ln = ln
if dss.port == "0" {
if _, dss.port, err = SplitHostPort(ln.Addr().String()); err != nil {
dss.teardown()
return nil, err
}
}
}
return dss, nil
}
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