Memcache udp scanner on python3

memcache_udp_scanner.py

import socket

TIME_OUT = 1
IP_LIST = "ips.txt"  # Ip list for check
OUTPUT_FILE = "vuln.txt"
PAYLOAD = "\x00\x00\x00\x00\x00\x01\x00\x00\x73\x74\x61\x74\x73\x0d\x0a"  # ........stats


def scan(ip):
    client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    client.settimeout(TIME_OUT)
    try:
        client.sendto(bytes(PAYLOAD, encoding='utf8'),
                      (ip, 11211))
        data = client.recvfrom(4096)
        length = len(data[0])
        if length > 200:
            print("The IP has vul of memcached: " + ip)
            save(ip)
        else:
            print("The IP possible vul of memcached: " + ip)
    except KeyboardInterrupt:
        print("Exiting.")
        exit(-1)
    except socket.timeout:
        print("No reply from " + ip + " after " + str(TIME_OUT) + "s")
    finally:
        client.close()


def save(ip):
    with open(OUTPUT_FILE, "a+") as file:
        file.write(ip + "\n")
        file.close()

# Author @MsterHuj
if __name__ == '__main__':
    f = open(IP_LIST, "r")
    for l in f:
        scan(l.replace('\n', ''))