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package gossh
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import (
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"golang.org/x/crypto/ssh"
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"io"
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"log"
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"net"
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"time"
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)
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// SshConfig 配置
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type SshConfig struct {
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Username string
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Password string
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ServerAddr string
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RemoteAddr string
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LocalAddr string
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}
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type Ssh struct {
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SshConfig
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}
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// NewSsh 实例化
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func NewSsh(config *SshConfig) *Ssh {
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app := &Ssh{}
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app.Username = config.Username
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app.Password = config.Password
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app.ServerAddr = config.ServerAddr
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app.RemoteAddr = config.RemoteAddr
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app.LocalAddr = config.LocalAddr
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return app
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}
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func (app *Ssh) Tunnel() {
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// 设置log配置
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log.Printf("%s,服务器:%s;远程:%s;本地:%s\n", "设置SSH配置", app.ServerAddr, app.RemoteAddr, app.LocalAddr)
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config := &ssh.ClientConfig{
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User: app.Username,
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Auth: []ssh.AuthMethod{
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ssh.Password(app.Password),
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},
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Timeout: 30 * time.Second,
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HostKeyCallback: func(hostname string, remote net.Addr, key ssh.PublicKey) error {
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return nil
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},
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}
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// 设置本地监听器
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localListener, err := net.Listen("tcp", app.LocalAddr)
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if err != nil {
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log.Printf("设置本地监听器失败: %v\n", err)
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}
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for {
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// 设置本地
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localConn, err := localListener.Accept()
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if err != nil {
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log.Printf("设置本地失败: %v\n", err)
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}
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go sForward(app.ServerAddr, app.RemoteAddr, localConn, config)
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}
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}
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// 转发
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func sForward(serverAddr string, remoteAddr string, localConn net.Conn, config *ssh.ClientConfig) {
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// 设置sshClientConn
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sshClientConn, err := ssh.Dial("tcp", serverAddr, config)
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if err != nil {
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log.Printf("连接失败: %s", err)
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}
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// 设置Connection
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sshConn, err := sshClientConn.Dial("tcp", remoteAddr)
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// 将localConn.Reader复制到sshConn.Writer
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go func() {
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_, err = io.Copy(sshConn, localConn)
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if err != nil {
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log.Printf("复制失败: %v", err)
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}
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}()
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// 将sshConn.Reader复制到localConn.Writer
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go func() {
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_, err = io.Copy(localConn, sshConn)
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if err != nil {
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log.Printf("复制失败: %v", err)
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}
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}()
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}
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