Python做扫描，发包速度实在是太慢了，有优化的方案吗？

问题描述

但是这个速度实在是太感人了，有没有优化的方案？不想写C的

代码如下:

#coding: utf-8import threading,time,os,argparse,subprocess,re,platformfrom scapy.all import *def port_service(port): return port_dict[port] if port in port_dict else ’Unknown’def send_syn(ip,port): send(IP(dst=ip)/TCP(dport=port,sport=RandShort(),flags=2),verbose=False)def get_ip_address(iface): if os.name==’posix’:ipre = ’%s.*?inet.*?(([0-9]{1,3}.){3}[0-9]{1,3})’%ifaceipconfig_process = subprocess.Popen('ifconfig', stdout=subprocess.PIPE) else:ipre = ’IPv4.*?(([0-9]{1,3}.){3}[0-9]{1,3})’%ifaceipconfig_process = subprocess.Popen('ipconfig', stdout=subprocess.PIPE) output = ipconfig_process.stdout.read() ip_pattern = re.compile(ipre,re.S) result=ip_pattern.search(output.decode(’utf-8’)) if len(result.groups())==2:return result.group(1)def catcher(packet): global result_dict ip=packet.getlayer(IP).src port=packet.getlayer(TCP).sport if ip in result_dict:result_dict[ip][’count’]+=1result_dict[ip][’ports’].append(port) else:result_dict[ip]={'count':1,'ports':[port]} print('[+] IP %s | Port %s '%(ip,port))def sniffer(iface,userIp,targetIpList): print('[*] Get your ip %s in iface %s , Simple Sniffer starting .......'%(userIp,iface)) fs=''.join(['src %s or '%stip for stip in targetIpList]) sniff(iface=iface, filter=’tcp and dst %s and tcp[13:1] & 18==18 and (%s)’%(userIp,fs[:len(fs)-3]), prn=catcher)if __name__ == ’__main__’: port_dict={19:’CG’,21:’FTP’,22:’SSH’,23:’TELNET’,25:’SMTP’,31:’MSG’,53:’DNS’,67:’BPS’,80:’HTTP’,110:’POP3’,443:’HTTPS’,1433:’Microsoft SQL Server’,1521:’Oracle DataBase’,1863:’MSN Message’,1883:’MQTT’,2181:’ZooKeeper’,3306:’Mysql Server’,3389:’Miscrosoft RDP’,4000:’Tencent QQ Client’,5000:’DB2’,6379:’Redis’,8000:’Tencent OICQ’,8080:’Http WWW Proxy’,8161:’Activemq Jetty Service’,11211:’Memcached’,27017:’MongoDB’,61616:’Activemq JMS’ } result_dict={} threads=[] parser=argparse.ArgumentParser(description='PortScanner Via MultiThread , MultiProcess and Coroutine version you can find in the same repository .') parser.add_argument(’-i’,’--ip_list’,dest=’ip_list’,required=True,type=str,help=’Privider the IP list for scan , use ',' to split each ip.’) parser.add_argument(’-n’,’--net_iface’,dest=’net_iface’,required=True,type=str,help=’Privider the net work iface , i will get you ip.’) parser.add_argument(’-r’,’--if_show’,action=’store_false’,dest=’if_show’,default=True,help=’Design if show the result after ports scan complete .’) parser.add_argument(’-p’,’--if_print’,action=’store_false’,dest=’if_print’,default=False,help=’Design if print the result while scaning the open port’) args=parser.parse_args() ip_list=args.ip_list.split(’,’) if_show=args.if_show if_print=args.if_print iface = args.net_iface userIP = get_ip_address(iface) if userIP is None:print(’[!] Can not ge ip from iface : %s’%iface)os._exit(1) sniffer_thread=threading.Thread(target=sniffer,args=(iface,userIP,ip_list)) sniffer_thread.start() time.sleep(0.2) for ip in ip_list:for port in range(1,65535): t=threading.Thread(target=send_syn,args=(ip,port,)) threads.append(t) t.start() for t in threads:t.join() time.sleep(0.2) if if_show:for (key,value) in result_dict.items(): print('[+] IP : %s has %d opened port.'%(key,value[’count’])) for port in value[’ports’]:print('-------> %5s | %s '%(port,port_service(port))) os._exit(0)

我试过把scapy换掉，自己组报文用Raw Socket发，还是这么慢......

问题解答

你要知道你的复杂度，len(ip_list) * len(port_list)

然后可以用 cProfile 分析你的运行瓶颈，是等待超时还是 io 切换，还是线程调度的问题

因为扫描看似是一个 io 密集型的程序，他可能受制于带宽、最大文件句柄数、线程切换等等

可能的解决方案：

切换异步 io，排除 io 切换时间影响

分布式任务

最重要的还是找到程序的瓶颈