golang 使用socks代理 连接远程ssh服务器

使用x/net/proxy包，如下所示:

package main

import (
    "log"

    "golang.org/x/crypto/ssh"
    "golang.org/x/net/proxy"
)

func main() {

    sshConfig := &ssh.ClientConfig{
        User: "user",
        // Auth: .... fill out with keys etc as normal
    }

    client, err := proxiedSSHClient("127.0.0.1:8000", "127.0.0.1:22", sshConfig)
    if err != nil {
        log.Fatal(err)
    }

    // get a session etc...
}

func proxiedSSHClient(proxyAddress, sshServerAddress string, sshConfig *ssh.ClientConfig) (*ssh.Client, error) {
    dialer, err := proxy.SOCKS5("tcp", proxyAddress, nil, proxy.Direct)
    if err != nil {
        return nil, err
    }

    conn, err := dialer.Dial("tcp", sshServerAddress)
    if err != nil {
        return nil, err
    }

    c, chans, reqs, err := ssh.NewClientConn(conn, sshServerAddress, sshConfig)
    if err != nil {
        return nil, err
    }

    return ssh.NewClient(c, chans, reqs), nil
}