import sys
import subprocess as sp
from threading import Thread

class pingThread(Thread):
    def __init__(self, ip = '127.0.0.1'):
        Thread.__init__(self)
        self.ip = ip
    def run(self):
        result = sp.run(['ping', '-c 1', self.ip], capture_output=True)
        if (result.returncode != 0):
            self.ip = None

def sweep_ping(address = '127.0.0.1', mask = '255.255.255.0'):
    hosts = []
    ping = [] 
    a1, a2, a3, a4 = address.split('.')
    m1, m2, m3, m4 = mask.split('.')

    for i1 in range(0, 256 - int(m1)):
        for i2 in range(0, 256 - int(m2)):
            for i3 in range(0, 256 - int(m3)):
                for i4 in range(0, 256 - int(m4)):
                    t1 = (int(a1) + i1) % 256
                    t2 = (int(a2) + i2) % 256
                    t3 = (int(a3) + i3) % 256
                    t4 = (int(a4) + i4) % 256    
                    ip = f'{t1}.{t2}.{t3}.{t4}'
                    ping.append(pingThread(ip))
                    ping[-1].start()
                    #print (ip)                        
    for p in ping:
        p.join()
        if p.ip:
            hosts.append(p.ip)
    return (hosts)

def main():
    hosts = sweep_ping(sys.argv[1], sys.argv[2])
    for h in hosts:
        print (h)
        
if __name__ == "__main__":
    main()