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hub.go
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hub.go
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package tcp
import (
"crypto/tls"
"errors"
"net"
"sync"
"time"
"v2ray.com/core/common/log"
v2net "v2ray.com/core/common/net"
"v2ray.com/core/transport/internet"
v2tls "v2ray.com/core/transport/internet/tls"
)
var (
ErrClosedListener = errors.New("Listener is closed.")
)
type ConnectionWithError struct {
conn net.Conn
err error
}
type TCPListener struct {
sync.Mutex
acccepting bool
listener *net.TCPListener
awaitingConns chan *ConnectionWithError
tlsConfig *tls.Config
config *Config
}
func ListenTCP(address v2net.Address, port v2net.Port, options internet.ListenOptions) (internet.Listener, error) {
listener, err := net.ListenTCP("tcp", &net.TCPAddr{
IP: address.IP(),
Port: int(port),
})
if err != nil {
return nil, err
}
networkSettings, err := options.Stream.GetEffectiveNetworkSettings()
if err != nil {
return nil, err
}
tcpSettings := networkSettings.(*Config)
l := &TCPListener{
acccepting: true,
listener: listener,
awaitingConns: make(chan *ConnectionWithError, 32),
config: tcpSettings,
}
if options.Stream != nil && options.Stream.SecurityType == internet.SecurityType_TLS {
securitySettings, err := options.Stream.GetEffectiveSecuritySettings()
if err != nil {
log.Error("TCP: Failed to apply TLS config: ", err)
return nil, err
}
l.tlsConfig = securitySettings.(*v2tls.Config).GetTLSConfig()
}
go l.KeepAccepting()
return l, nil
}
func (this *TCPListener) Accept() (internet.Connection, error) {
for this.acccepting {
select {
case connErr, open := <-this.awaitingConns:
if !open {
return nil, ErrClosedListener
}
if connErr.err != nil {
return nil, connErr.err
}
conn := connErr.conn
if this.tlsConfig != nil {
conn = tls.Server(conn, this.tlsConfig)
}
return NewConnection("", conn, this, this.config), nil
case <-time.After(time.Second * 2):
}
}
return nil, ErrClosedListener
}
func (this *TCPListener) KeepAccepting() {
for this.acccepting {
conn, err := this.listener.Accept()
this.Lock()
if !this.acccepting {
this.Unlock()
break
}
select {
case this.awaitingConns <- &ConnectionWithError{
conn: conn,
err: err,
}:
default:
if conn != nil {
conn.Close()
}
}
this.Unlock()
}
}
func (this *TCPListener) Recycle(dest string, conn net.Conn) {
this.Lock()
defer this.Unlock()
if !this.acccepting {
return
}
select {
case this.awaitingConns <- &ConnectionWithError{conn: conn}:
default:
conn.Close()
}
}
func (this *TCPListener) Addr() net.Addr {
return this.listener.Addr()
}
func (this *TCPListener) Close() error {
this.Lock()
defer this.Unlock()
this.acccepting = false
this.listener.Close()
close(this.awaitingConns)
for connErr := range this.awaitingConns {
if connErr.conn != nil {
go connErr.conn.Close()
}
}
return nil
}
type RawTCPListener struct {
accepting bool
listener *net.TCPListener
}
func (this *RawTCPListener) Accept() (internet.Connection, error) {
conn, err := this.listener.AcceptTCP()
if err != nil {
return nil, err
}
return &RawConnection{
TCPConn: *conn,
}, nil
}
func (this *RawTCPListener) Addr() net.Addr {
return this.listener.Addr()
}
func (this *RawTCPListener) Close() error {
this.accepting = false
this.listener.Close()
return nil
}
func ListenRawTCP(address v2net.Address, port v2net.Port, options internet.ListenOptions) (internet.Listener, error) {
listener, err := net.ListenTCP("tcp", &net.TCPAddr{
IP: address.IP(),
Port: int(port),
})
if err != nil {
return nil, err
}
// TODO: handle listen options
return &RawTCPListener{
accepting: true,
listener: listener,
}, nil
}
func init() {
internet.TCPListenFunc = ListenTCP
internet.RawTCPListenFunc = ListenRawTCP
}