mirror of https://github.com/fatedier/frp.git
105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
// 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 visitor
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import (
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"context"
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"net"
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"sync"
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v1 "github.com/fatedier/frp/pkg/config/v1"
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"github.com/fatedier/frp/pkg/transport"
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netpkg "github.com/fatedier/frp/pkg/util/net"
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"github.com/fatedier/frp/pkg/util/xlog"
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)
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// Helper wraps some functions for visitor to use.
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type Helper interface {
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// ConnectServer directly connects to the frp server.
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ConnectServer() (net.Conn, error)
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// TransferConn transfers the connection to another visitor.
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TransferConn(string, net.Conn) error
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// MsgTransporter returns the message transporter that is used to send and receive messages
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// to the frp server through the controller.
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MsgTransporter() transport.MessageTransporter
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// RunID returns the run id of current controller.
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RunID() string
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}
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// Visitor is used for forward traffics from local port tot remote service.
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type Visitor interface {
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Run() error
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AcceptConn(conn net.Conn) error
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Close()
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}
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func NewVisitor(
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ctx context.Context,
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cfg v1.VisitorConfigurer,
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clientCfg *v1.ClientCommonConfig,
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helper Helper,
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) (visitor Visitor) {
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xl := xlog.FromContextSafe(ctx).Spawn().AppendPrefix(cfg.GetBaseConfig().Name)
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baseVisitor := BaseVisitor{
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clientCfg: clientCfg,
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helper: helper,
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ctx: xlog.NewContext(ctx, xl),
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internalLn: netpkg.NewInternalListener(),
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}
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switch cfg := cfg.(type) {
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case *v1.STCPVisitorConfig:
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visitor = &STCPVisitor{
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BaseVisitor: &baseVisitor,
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cfg: cfg,
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}
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case *v1.XTCPVisitorConfig:
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visitor = &XTCPVisitor{
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BaseVisitor: &baseVisitor,
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cfg: cfg,
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startTunnelCh: make(chan struct{}),
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}
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case *v1.SUDPVisitorConfig:
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visitor = &SUDPVisitor{
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BaseVisitor: &baseVisitor,
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cfg: cfg,
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checkCloseCh: make(chan struct{}),
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}
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}
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return
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}
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type BaseVisitor struct {
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clientCfg *v1.ClientCommonConfig
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helper Helper
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l net.Listener
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internalLn *netpkg.InternalListener
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mu sync.RWMutex
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ctx context.Context
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}
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func (v *BaseVisitor) AcceptConn(conn net.Conn) error {
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return v.internalLn.PutConn(conn)
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}
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func (v *BaseVisitor) Close() {
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if v.l != nil {
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v.l.Close()
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}
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if v.internalLn != nil {
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v.internalLn.Close()
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}
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}
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