python-UDP协议
UDP协议:
python中基于udp协议的客户端与服务端通信简单过程实现
udp协议的一些特点(与tcp协议的比较)
利用socketserver模块实现udp传输协议的并发通信
代码:
import optparse
from scapy.all import *
from scapy.layers.inet import IP, TCP
def Scan(ip):
try:
dport = random.randint(1, 65535)
packet = IP(dst=ip) / TCP(dport=80)
respone = sr1(packet, timeout=1.0, verbose=0)
if respone:
if int(respone[IP].proto) == 1:
time.sleep(0.5)
print(ip + ' ' + "is up")
else:
print(ip + ' ' + "is down")
else:
print(ip + ' ' + "is down")
except:
pass
def main():
parser = optparse.OptionParser("Usage: %prog -i <ip address>")
parser.add_option("-i", '--ip', type="string", dest="targetIP", help="specify the IP address")
options, args = parser.parse_args()
if '-' in options.targetIP:
for i in range(int(options.targetIP.split('-')[0].split('.')[3]), int(options.targetIP.split('-')[1]) + 1):
Scan(options.targetIP.split('.')[0] + '.' + options.targetIP.split('.')[1] + '.' +
options.targetIP.split('.')[2] + '.' + str(i))
else:
Scan(options.targetIP)
if __name__ == '__main__':
main()