mirror of
https://github.com/fatedier/frp.git
synced 2024-12-12 17:50:51 +01:00
228 lines
6.7 KiB
Go
228 lines
6.7 KiB
Go
// Copyright 2023 The frp Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this 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 client
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"io"
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
libnet "github.com/fatedier/golib/net"
|
|
fmux "github.com/hashicorp/yamux"
|
|
quic "github.com/quic-go/quic-go"
|
|
"github.com/samber/lo"
|
|
|
|
v1 "github.com/fatedier/frp/pkg/config/v1"
|
|
"github.com/fatedier/frp/pkg/transport"
|
|
netpkg "github.com/fatedier/frp/pkg/util/net"
|
|
"github.com/fatedier/frp/pkg/util/xlog"
|
|
)
|
|
|
|
// Connector is an interface for establishing connections to the server.
|
|
type Connector interface {
|
|
Open() error
|
|
Connect() (net.Conn, error)
|
|
Close() error
|
|
}
|
|
|
|
// defaultConnectorImpl is the default implementation of Connector for normal frpc.
|
|
type defaultConnectorImpl struct {
|
|
ctx context.Context
|
|
cfg *v1.ClientCommonConfig
|
|
|
|
muxSession *fmux.Session
|
|
quicConn quic.Connection
|
|
closeOnce sync.Once
|
|
}
|
|
|
|
func NewConnector(ctx context.Context, cfg *v1.ClientCommonConfig) Connector {
|
|
return &defaultConnectorImpl{
|
|
ctx: ctx,
|
|
cfg: cfg,
|
|
}
|
|
}
|
|
|
|
// Open opens an underlying connection to the server.
|
|
// The underlying connection is either a TCP connection or a QUIC connection.
|
|
// After the underlying connection is established, you can call Connect() to get a stream.
|
|
// If TCPMux isn't enabled, the underlying connection is nil, you will get a new real TCP connection every time you call Connect().
|
|
func (c *defaultConnectorImpl) Open() error {
|
|
xl := xlog.FromContextSafe(c.ctx)
|
|
|
|
// special for quic
|
|
if strings.EqualFold(c.cfg.Transport.Protocol, "quic") {
|
|
var tlsConfig *tls.Config
|
|
var err error
|
|
sn := c.cfg.Transport.TLS.ServerName
|
|
if sn == "" {
|
|
sn = c.cfg.ServerAddr
|
|
}
|
|
if lo.FromPtr(c.cfg.Transport.TLS.Enable) {
|
|
tlsConfig, err = transport.NewClientTLSConfig(
|
|
c.cfg.Transport.TLS.CertFile,
|
|
c.cfg.Transport.TLS.KeyFile,
|
|
c.cfg.Transport.TLS.TrustedCaFile,
|
|
sn)
|
|
} else {
|
|
tlsConfig, err = transport.NewClientTLSConfig("", "", "", sn)
|
|
}
|
|
if err != nil {
|
|
xl.Warnf("fail to build tls configuration, err: %v", err)
|
|
return err
|
|
}
|
|
tlsConfig.NextProtos = []string{"frp"}
|
|
|
|
conn, err := quic.DialAddr(
|
|
c.ctx,
|
|
net.JoinHostPort(c.cfg.ServerAddr, strconv.Itoa(c.cfg.ServerPort)),
|
|
tlsConfig, &quic.Config{
|
|
MaxIdleTimeout: time.Duration(c.cfg.Transport.QUIC.MaxIdleTimeout) * time.Second,
|
|
MaxIncomingStreams: int64(c.cfg.Transport.QUIC.MaxIncomingStreams),
|
|
KeepAlivePeriod: time.Duration(c.cfg.Transport.QUIC.KeepalivePeriod) * time.Second,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
c.quicConn = conn
|
|
return nil
|
|
}
|
|
|
|
if !lo.FromPtr(c.cfg.Transport.TCPMux) {
|
|
return nil
|
|
}
|
|
|
|
conn, err := c.realConnect()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
fmuxCfg := fmux.DefaultConfig()
|
|
fmuxCfg.KeepAliveInterval = time.Duration(c.cfg.Transport.TCPMuxKeepaliveInterval) * time.Second
|
|
fmuxCfg.LogOutput = io.Discard
|
|
fmuxCfg.MaxStreamWindowSize = 6 * 1024 * 1024
|
|
session, err := fmux.Client(conn, fmuxCfg)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
c.muxSession = session
|
|
return nil
|
|
}
|
|
|
|
// Connect returns a stream from the underlying connection, or a new TCP connection if TCPMux isn't enabled.
|
|
func (c *defaultConnectorImpl) Connect() (net.Conn, error) {
|
|
if c.quicConn != nil {
|
|
stream, err := c.quicConn.OpenStreamSync(context.Background())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return netpkg.QuicStreamToNetConn(stream, c.quicConn), nil
|
|
} else if c.muxSession != nil {
|
|
stream, err := c.muxSession.OpenStream()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return stream, nil
|
|
}
|
|
|
|
return c.realConnect()
|
|
}
|
|
|
|
func (c *defaultConnectorImpl) realConnect() (net.Conn, error) {
|
|
xl := xlog.FromContextSafe(c.ctx)
|
|
var tlsConfig *tls.Config
|
|
var err error
|
|
tlsEnable := lo.FromPtr(c.cfg.Transport.TLS.Enable)
|
|
if c.cfg.Transport.Protocol == "wss" {
|
|
tlsEnable = true
|
|
}
|
|
if tlsEnable {
|
|
sn := c.cfg.Transport.TLS.ServerName
|
|
if sn == "" {
|
|
sn = c.cfg.ServerAddr
|
|
}
|
|
|
|
tlsConfig, err = transport.NewClientTLSConfig(
|
|
c.cfg.Transport.TLS.CertFile,
|
|
c.cfg.Transport.TLS.KeyFile,
|
|
c.cfg.Transport.TLS.TrustedCaFile,
|
|
sn)
|
|
if err != nil {
|
|
xl.Warnf("fail to build tls configuration, err: %v", err)
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
proxyType, addr, auth, err := libnet.ParseProxyURL(c.cfg.Transport.ProxyURL)
|
|
if err != nil {
|
|
xl.Errorf("fail to parse proxy url")
|
|
return nil, err
|
|
}
|
|
dialOptions := []libnet.DialOption{}
|
|
protocol := c.cfg.Transport.Protocol
|
|
switch protocol {
|
|
case "websocket":
|
|
protocol = "tcp"
|
|
dialOptions = append(dialOptions, libnet.WithAfterHook(libnet.AfterHook{Hook: netpkg.DialHookWebsocket(protocol, "")}))
|
|
dialOptions = append(dialOptions, libnet.WithAfterHook(libnet.AfterHook{
|
|
Hook: netpkg.DialHookCustomTLSHeadByte(tlsConfig != nil, lo.FromPtr(c.cfg.Transport.TLS.DisableCustomTLSFirstByte)),
|
|
}))
|
|
dialOptions = append(dialOptions, libnet.WithTLSConfig(tlsConfig))
|
|
case "wss":
|
|
protocol = "tcp"
|
|
dialOptions = append(dialOptions, libnet.WithTLSConfigAndPriority(100, tlsConfig))
|
|
// Make sure that if it is wss, the websocket hook is executed after the tls hook.
|
|
dialOptions = append(dialOptions, libnet.WithAfterHook(libnet.AfterHook{Hook: netpkg.DialHookWebsocket(protocol, tlsConfig.ServerName), Priority: 110}))
|
|
default:
|
|
dialOptions = append(dialOptions, libnet.WithAfterHook(libnet.AfterHook{
|
|
Hook: netpkg.DialHookCustomTLSHeadByte(tlsConfig != nil, lo.FromPtr(c.cfg.Transport.TLS.DisableCustomTLSFirstByte)),
|
|
}))
|
|
dialOptions = append(dialOptions, libnet.WithTLSConfig(tlsConfig))
|
|
}
|
|
|
|
if c.cfg.Transport.ConnectServerLocalIP != "" {
|
|
dialOptions = append(dialOptions, libnet.WithLocalAddr(c.cfg.Transport.ConnectServerLocalIP))
|
|
}
|
|
dialOptions = append(dialOptions,
|
|
libnet.WithProtocol(protocol),
|
|
libnet.WithTimeout(time.Duration(c.cfg.Transport.DialServerTimeout)*time.Second),
|
|
libnet.WithKeepAlive(time.Duration(c.cfg.Transport.DialServerKeepAlive)*time.Second),
|
|
libnet.WithProxy(proxyType, addr),
|
|
libnet.WithProxyAuth(auth),
|
|
)
|
|
conn, err := libnet.DialContext(
|
|
c.ctx,
|
|
net.JoinHostPort(c.cfg.ServerAddr, strconv.Itoa(c.cfg.ServerPort)),
|
|
dialOptions...,
|
|
)
|
|
return conn, err
|
|
}
|
|
|
|
func (c *defaultConnectorImpl) Close() error {
|
|
c.closeOnce.Do(func() {
|
|
if c.quicConn != nil {
|
|
_ = c.quicConn.CloseWithError(0, "")
|
|
}
|
|
if c.muxSession != nil {
|
|
_ = c.muxSession.Close()
|
|
}
|
|
})
|
|
return nil
|
|
}
|