Scapy编写ICMP扫描脚本

from scapy.all import *
import optparse
import threading
import osdef scan(ipt):
pkt=IP(dst=ipt)/ICMP()
res=sr1(pkt,timeout=0.1,verbose=0)
if res:
print(ipt,' is online')def main():
parser=optparse.OptionParser("%prog "+"-t <target> -f <filename>")
parser.add_option('-t',dest='target',type='string',help='Target')
parser.add_option('-f',dest='fil',type='string',help='Filename')
(options,args)=parser.parse_args()
target=options.target
fil=options.fil
if(target==None) and (fil==None):
print('Please input target(-t) or file(-f)')
exit(0) if target:
iplist=target.split('.')
ip=iplist[0]+'.'+iplist[1]+'.'+iplist[2]+'.'
for t in range(1,255):
ipt=ip+str(t)
t=threading.Thread(target=scan,args=(ipt,))
t.start()
if fil:
if os.path.exists(fil):
with open(fil) as f:
for i in f.readlines():
ipt=i.strip('\n')
t=threading.Thread(target=scan,args=(ipt,))
t.start()
else:
print('File is not exists!')
exit(0)if __name__=='__main__':
main()