mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-09-05 03:24:21 -04:00
165 lines
3.6 KiB
Go
165 lines
3.6 KiB
Go
package tcp
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import (
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"crypto/tls"
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"net"
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"sync"
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"time"
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"v2ray.com/core/common"
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"v2ray.com/core/common/errors"
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"v2ray.com/core/common/log"
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v2net "v2ray.com/core/common/net"
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"v2ray.com/core/transport/internet"
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"v2ray.com/core/transport/internet/internal"
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v2tls "v2ray.com/core/transport/internet/tls"
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)
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var (
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ErrClosedListener = errors.New("Listener is closed.")
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)
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type ConnectionWithError struct {
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conn net.Conn
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err error
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}
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type TCPListener struct {
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sync.Mutex
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acccepting bool
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listener *net.TCPListener
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awaitingConns chan *ConnectionWithError
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tlsConfig *tls.Config
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authConfig internet.ConnectionAuthenticator
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config *Config
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}
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func ListenTCP(address v2net.Address, port v2net.Port, options internet.ListenOptions) (internet.Listener, error) {
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listener, err := net.ListenTCP("tcp", &net.TCPAddr{
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IP: address.IP(),
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Port: int(port),
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})
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if err != nil {
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return nil, err
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}
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log.Info("TCP|Listener: Listening on ", address, ":", port)
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networkSettings, err := options.Stream.GetEffectiveTransportSettings()
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if err != nil {
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return nil, err
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}
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tcpSettings := networkSettings.(*Config)
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l := &TCPListener{
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acccepting: true,
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listener: listener,
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awaitingConns: make(chan *ConnectionWithError, 32),
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config: tcpSettings,
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}
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if options.Stream != nil && options.Stream.HasSecuritySettings() {
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securitySettings, err := options.Stream.GetEffectiveSecuritySettings()
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if err != nil {
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log.Error("TCP: Failed to get security config: ", err)
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return nil, err
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}
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tlsConfig, ok := securitySettings.(*v2tls.Config)
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if ok {
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l.tlsConfig = tlsConfig.GetTLSConfig()
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}
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}
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if tcpSettings.HeaderSettings != nil {
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headerConfig, err := tcpSettings.HeaderSettings.GetInstance()
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if err != nil {
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return nil, errors.Base(err).Message("Internet|TCP: Invalid header settings.")
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}
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auth, err := internet.CreateConnectionAuthenticator(headerConfig)
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if err != nil {
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return nil, errors.Base(err).Message("Internet|TCP: Invalid header settings.")
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}
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l.authConfig = auth
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}
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go l.KeepAccepting()
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return l, nil
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}
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func (v *TCPListener) Accept() (internet.Connection, error) {
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for v.acccepting {
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select {
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case connErr, open := <-v.awaitingConns:
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if !open {
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return nil, ErrClosedListener
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}
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if connErr.err != nil {
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return nil, connErr.err
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}
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conn := connErr.conn
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return internal.NewConnection(internal.ConnectionID{}, conn, v, internal.ReuseConnection(v.config.IsConnectionReuse())), nil
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case <-time.After(time.Second * 2):
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}
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}
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return nil, ErrClosedListener
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}
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func (v *TCPListener) KeepAccepting() {
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for v.acccepting {
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conn, err := v.listener.Accept()
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v.Lock()
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if !v.acccepting {
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v.Unlock()
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break
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}
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if v.tlsConfig != nil {
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conn = tls.Server(conn, v.tlsConfig)
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}
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if v.authConfig != nil {
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conn = v.authConfig.Server(conn)
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}
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select {
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case v.awaitingConns <- &ConnectionWithError{
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conn: conn,
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err: err,
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}:
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default:
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if conn != nil {
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conn.Close()
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}
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}
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v.Unlock()
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}
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}
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func (v *TCPListener) Put(id internal.ConnectionID, conn net.Conn) {
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v.Lock()
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defer v.Unlock()
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if !v.acccepting {
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return
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}
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select {
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case v.awaitingConns <- &ConnectionWithError{conn: conn}:
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default:
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conn.Close()
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}
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}
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func (v *TCPListener) Addr() net.Addr {
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return v.listener.Addr()
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}
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func (v *TCPListener) Close() error {
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v.Lock()
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defer v.Unlock()
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v.acccepting = false
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v.listener.Close()
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close(v.awaitingConns)
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for connErr := range v.awaitingConns {
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if connErr.conn != nil {
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connErr.conn.Close()
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}
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}
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return nil
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}
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func init() {
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common.Must(internet.RegisterTransportListener(internet.TransportProtocol_TCP, ListenTCP))
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}
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