实现端口转发功能，经测试，ssh、http可以正常使用

target_client.py

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+
+
+
+import os
+import sys
+import json
+import socket
+import threading
+import time
+
+
+import prot_codec as pc
+
+
+
+# tcp 客户端脚本
+# 一个本地服务端
+# 一个远程客户端
+
+
+
+_LOCAL_PORT = 31234
+
+_remote_client=None
+_local_client=[]
+
+
+
+# 发送数据到指定ip地址和端口
+def send_to(ip,port,data:bytearray):
+  for item in _local_client:
+    if(item[1]==ip and item[2]==port):
+      print(f"recv from remote {ip},{port}")
+      item[0].send(data)
+      return
+  print(f"can not fond {ip},{port}")
+
+
+# 关闭指定地址的端口
+def close(ip,port):
+  for item in _local_client:
+    if(item[1]==ip and item[2]==port):
+      item[0].close()
+      break
+
+
+
+
+
+# 远端数据处理，解包，把负载数据发送到本地服务器
+def remote_client_handler(tcp_remote:socket):
+  global _remote_client
+  global _local_client
+  print("已连接代理服务器")
+  recv_data=bytearray()
+  cmd={'device':'client','option':'login'}
+  data=pc.encode(json.dumps(cmd).encode('utf-8'),b'default')
+  _remote_client.send(data)
+  while True:
+    try:
+      recv = tcp_remote.recv(4096)
+    except Exception as e:
+      print(str(e))
+      break
+    if recv:
+      recv_data+=recv
+      while True:
+        start=recv_data.find(b'\xff')
+        end=recv_data.find(b'\xfe')
+        if(start==-1 or end==-1):
+          break
+        cmd,data=pc.decode(recv_data[start:end+1])
+        print(cmd.decode('utf-8'))
+        try:
+          j=json.loads(cmd)
+          if(j['device']=='server'):
+            if(j['option']=='data'):
+              send_to(j['ip'],j['port'],data)
+            elif(j['option']=='disconnect'):
+              close(j['ip'],j['port'])
+        except Exception as e:
+          print(str(e))
+        recv_data=recv_data[end+1:]
+    else:
+      break
+  tcp_remote.close()
+
+
+# 本地数据处理，解包，把负载数据发送到本地服务器
+def local_client_handler(tcp_server:socket,addr):
+  global _remote_client
+  global _local_client
+  print("addr:",addr)
+  addr_info=(tcp_server,addr[0],addr[1])
+  _local_client.append(addr_info)
+  if(_remote_client is not None):
+    cmd={'device':'client','option':'connect','ip':addr[0],'port':addr[1]}
+    data=pc.encode(json.dumps(cmd).encode('utf-8'),b'default')
+    _remote_client.send(data)
+  while True:
+    try:
+      recv = tcp_server.recv(4096)
+    except Exception as e:
+      print(str(e))
+      break
+    if recv:
+      cmd={'device':'client','option':'data','ip':addr[0],'port':addr[1]}
+      data=pc.encode(json.dumps(cmd).encode('utf-8'),recv)
+      if _remote_client is not None:
+        _remote_client.send(data)
+        print(f"send to remote {addr[0]},{addr[1]}")
+    else:
+      break
+  tcp_server.close()
+  if(_remote_client is not None):
+    cmd={'device':'client','option':'disconnect','ip':addr[0],'port':addr[1]}
+    data=pc.encode(json.dumps(cmd).encode('utf-8'),b'default')
+    _remote_client.send(data)
+  _local_client.remove(addr_info)
+
+
+
+def main():
+  global _remote_client
+  global _local_client
+
+  _remote_client = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+  _remote_client.connect(("1.92.113.30",5345))
+  thd = threading.Thread(target = remote_client_handler, args = (_remote_client,))
+  thd.start()
+  tcp_server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+  tcp_server.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,True)
+  tcp_server.bind(("",_LOCAL_PORT))
+  print(f"开始监听({_LOCAL_PORT})")
+  tcp_server.listen(128)
+  while True:
+      temp , temp_address = tcp_server.accept()
+      thd = threading.Thread(target = local_client_handler, args = (temp,temp_address))
+      thd.start()
+
+
+if __name__ == "__main__":
+  main()
+