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157 lines
3.5 KiB
157 lines
3.5 KiB
// Copyright 2017 fatedier, fatedier@gmail.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package client
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import (
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"fmt"
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"io"
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"github.com/fatedier/frp/models/config"
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"github.com/fatedier/frp/models/proto/tcp"
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"github.com/fatedier/frp/utils/net"
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)
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// Proxy defines how to work for different proxy type.
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type Proxy interface {
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Run() error
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// InWorkConn accept work connections registered to server.
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InWorkConn(conn net.Conn)
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Close()
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}
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func NewProxy(ctl *Control, pxyConf config.ProxyConf) (pxy Proxy) {
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switch cfg := pxyConf.(type) {
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case *config.TcpProxyConf:
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pxy = &TcpProxy{
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cfg: cfg,
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ctl: ctl,
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}
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case *config.UdpProxyConf:
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pxy = &UdpProxy{
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cfg: cfg,
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ctl: ctl,
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}
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case *config.HttpProxyConf:
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pxy = &HttpProxy{
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cfg: cfg,
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ctl: ctl,
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}
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case *config.HttpsProxyConf:
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pxy = &HttpsProxy{
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cfg: cfg,
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ctl: ctl,
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}
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}
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return
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}
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// TCP
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type TcpProxy struct {
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cfg *config.TcpProxyConf
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ctl *Control
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}
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func (pxy *TcpProxy) Run() (err error) {
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return
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}
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func (pxy *TcpProxy) Close() {
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}
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func (pxy *TcpProxy) InWorkConn(conn net.Conn) {
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defer conn.Close()
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HandleTcpWorkConnection(&pxy.cfg.LocalSvrConf, &pxy.cfg.BaseProxyConf, conn)
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}
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// HTTP
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type HttpProxy struct {
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cfg *config.HttpProxyConf
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ctl *Control
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}
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func (pxy *HttpProxy) Run() (err error) {
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return
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}
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func (pxy *HttpProxy) Close() {
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}
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func (pxy *HttpProxy) InWorkConn(conn net.Conn) {
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defer conn.Close()
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HandleTcpWorkConnection(&pxy.cfg.LocalSvrConf, &pxy.cfg.BaseProxyConf, conn)
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}
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// HTTPS
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type HttpsProxy struct {
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cfg *config.HttpsProxyConf
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ctl *Control
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}
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func (pxy *HttpsProxy) Run() (err error) {
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return
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}
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func (pxy *HttpsProxy) Close() {
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}
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func (pxy *HttpsProxy) InWorkConn(conn net.Conn) {
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defer conn.Close()
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HandleTcpWorkConnection(&pxy.cfg.LocalSvrConf, &pxy.cfg.BaseProxyConf, conn)
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}
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// UDP
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type UdpProxy struct {
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cfg *config.UdpProxyConf
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ctl *Control
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}
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func (pxy *UdpProxy) Run() (err error) {
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return
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}
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func (pxy *UdpProxy) Close() {
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}
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func (pxy *UdpProxy) InWorkConn(conn net.Conn) {
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defer conn.Close()
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}
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// Common handler for tcp work connections.
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func HandleTcpWorkConnection(localInfo *config.LocalSvrConf, baseInfo *config.BaseProxyConf, workConn net.Conn) {
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localConn, err := net.ConnectTcpServer(fmt.Sprintf("%s:%d", localInfo.LocalIp, localInfo.LocalPort))
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if err != nil {
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workConn.Error("connect to local service [%s:%d] error: %v", localInfo.LocalIp, localInfo.LocalPort, err)
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return
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}
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var remote io.ReadWriteCloser
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remote = workConn
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if baseInfo.UseEncryption {
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remote, err = tcp.WithEncryption(remote, []byte(config.ClientCommonCfg.PrivilegeToken))
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if err != nil {
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workConn.Error("create encryption stream error: %v", err)
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return
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}
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}
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if baseInfo.UseCompression {
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remote = tcp.WithCompression(remote)
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}
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workConn.Debug("join connections, localConn(l[%s] r[%s]) workConn(l[%s] r[%s])", localConn.LocalAddr().String(),
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localConn.RemoteAddr().String(), workConn.LocalAddr().String(), workConn.RemoteAddr().String())
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tcp.Join(localConn, remote)
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workConn.Debug("join connections closed")
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}
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