TCP 1~65535までのポートスキャンを行う。
高速化のためスレッドを30000作成した。
PCが重たかったらif i%30000のところで調整する。

使用例)
python tcp_scan.py 192.168.x.y

import socket
import sys
import threading

opend_port = []

def port_scan(ip,port):
    global opend_port
    sd = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    sd.settimeout(1)
    res = sd.connect_ex((ip,port))
    sd.close()
    if res == 0:
        opend_port.append(port)

def main():
    ip = sys.argv[1]
    
    print(f"target is {ip}")

    threads = []
    max_port = 65535
    for i in range(1,max_port+1):
        print(f"{i} of {max_port}\r",end="")
        port = i
        thread = threading.Thread(target=port_scan,args=(ip,port,))
        threads.append(thread)
        thread.start()
        if i%30000 == 0:
            for thread in threads:
                thread.join()
            threads = []
        
    if len(threads):
        for thread in threads:
            thread.join()

    print("opened tcp ports >")
    for i in opend_port:
        print(i)
    return

if __name__ == "__main__":
    main()