实现端口转发功能，经测试，ssh、http可以正常使用

target_server.py

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+
+
+import os
+import sys
+import json
+import socket
+import threading
+
+
+import prot_codec as pc
+
+
+
+
+
+
+
+# tcp服务端脚本
+# 一个连接远端转发服务器
+# 另一个连接本地tcp服务器
+
+
+_remote_client=None
+_local_client=[]
+
+
+LOCAL_SERVER_IP = ("192.168.3.166",80)
+# LOCAL_SERVER_IP = ("192.168.3.167",22)
+
+
+
+# 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)
+      break
+
+# 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
+
+
+
+
+# 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,ip,port):
+  global _remote_client
+  global _local_client
+  self_info=(tcp_server,ip,port)
+  _local_client.append(self_info)
+  while True:
+    try:
+      recv = tcp_server.recv(4096)
+    except Exception as e:
+      print(str(e))
+      break
+    if recv:
+      cmd={'device':'server','option':'data','ip':ip,'port':port}
+      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 {ip},{port}")
+
+    else:
+      break
+  tcp_server.close()
+  cmd={'device':'server','option':'disconnect','ip':ip,'port':port}
+  data=pc.encode(json.dumps(cmd).encode('utf-8'),b'default')
+  if _remote_client is not None:
+    _remote_client.send(data)
+  _local_client.remove(self_info)
+
+
+
+
+# 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_client_1:socket):
+  global _remote_client
+  global _local_client
+  print("已连接代理服务器")
+  cmd={'device':'server','option':'login'}
+  data=pc.encode(json.dumps(cmd).encode('utf-8'),b'default')
+  _remote_client.send(data)
+  recv_data=bytearray()
+  while True:
+    try:
+      recv = tcp_client_1.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']=='client'):
+            if(j['option']=='connect'):
+              temp = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+              temp.connect(LOCAL_SERVER_IP)
+              thd = threading.Thread(target = local_client_handler, args = (temp,j['ip'],j['port']))
+              thd.start()
+            elif(j['option']=='disconnect'):
+              close(j['ip'],j['port'])
+            elif(j['option']=='data'):
+              send_to(j['ip'],j['port'],data)
+        except Exception as e:
+          print(str(e))
+        recv_data=recv_data[end+1:]
+    else:
+      break
+  tcp_client_1.close()
+  print("socket close.")
+
+
+
+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()
+  # thd.join()
+
+  remote_client_handler(_remote_client)
+
+
+
+
+
+if __name__ == "__main__":
+  main()
+