import sys
import socket

def main():
    args = sys.argv 
    if len(args) < 2:
        print("[!]Falta argumentos para o programa! Saindo...")
        sys.exit(1)
    ip = args[1]
    portas = args[2] if len(args) >= 3 else "1:65536"
    #print(portas)
    portas = (x for x in range(int(portas.split(":")[0]), int(portas.split(":")[1])+1))
    scan(ip, portas)

def banner(sckt, ip, porta):
    try:
        sckt.settimeout(1)
        sckt.connect((ip, porta))
        banner = sckt.recv(1024).decode().strip()
        assert banner
        return banner
    except:
        return "Unknown"

def child(ip, port):
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) 
        s.settimeout(0.3)
        if s.connect_ex((ip, port)) == 0:
            print("{}/tcp open".format(port), end="|")
            print(banner(s, ip, port))
    except:
        pass

def scan(ip, portas):
    for c in portas:
        child(ip, c)

if __name__ == '__main__':
    main()