kannn
86 lines
2.0 KiB
Go
86 lines
2.0 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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"net"
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"strconv"
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libio "github.com/fatedier/golib/io"
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v1 "kanhole/pkg/config/v1"
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"kanhole/pkg/util/xlog"
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)
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type STCPVisitor struct {
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*BaseVisitor
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cfg *v1.STCPVisitorConfig
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}
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func (sv *STCPVisitor) Run() (err error) {
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if sv.cfg.BindPort > 0 {
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sv.l, err = net.Listen("tcp", net.JoinHostPort(sv.cfg.BindAddr, strconv.Itoa(sv.cfg.BindPort)))
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if err != nil {
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return
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}
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go sv.acceptLoop(sv.l, "stcp local", sv.handleConn)
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}
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go sv.acceptLoop(sv.internalLn, "stcp internal", sv.handleConn)
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if sv.plugin != nil {
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sv.plugin.Start()
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}
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return
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}
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func (sv *STCPVisitor) Close() {
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sv.BaseVisitor.Close()
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}
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func (sv *STCPVisitor) handleConn(userConn net.Conn) {
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xl := xlog.FromContextSafe(sv.ctx)
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var tunnelErr error
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defer func() {
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if tunnelErr != nil {
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if eConn, ok := userConn.(interface{ CloseWithError(error) error }); ok {
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_ = eConn.CloseWithError(tunnelErr)
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return
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}
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}
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userConn.Close()
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}()
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xl.Debugf("get a new stcp user connection")
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visitorConn, err := sv.dialRawVisitorConn(sv.cfg.GetBaseConfig())
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if err != nil {
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xl.Warnf("dialRawVisitorConn error: %v", err)
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tunnelErr = err
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return
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}
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defer visitorConn.Close()
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remote, recycleFn, err := wrapVisitorConn(visitorConn, sv.cfg.GetBaseConfig())
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if err != nil {
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xl.Warnf("wrapVisitorConn error: %v", err)
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tunnelErr = err
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return
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}
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defer recycleFn()
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libio.Join(userConn, remote)
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}
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