scapy sniff函数_sniffer使用

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大家好，我是架构君，一个会写代码吟诗的架构师。今天说一说scapy sniff函数_sniffer使用,希望能够帮助大家进步!!!

Sniff方法定义：

sniff(filter="",iface="any", prn=function, count=N)

filter的规则使用 Berkeley Packet Filter (BPF)语法，具体参考http://blog.csdn.net/qwertyupoiuytr/article/details/54670477

iface用来指定要在哪个网络接口上进行抓包（通常不指定即所有网络接口）

prn指定回调函数，每当一个符合filter的报文被探测到时，就会执行回调函数，通常使用lambda表达式来写回调函数

count指定最多嗅探多少个报文（是指符合filter条件的报文，而非所有报文）

filter写法举例：

抓取源地址为172.31.100.222的端口为80的tcp报文：

| >>> sniff(filter="ip src 172.31.100.222 and tcp and tcp port 80", prn=lambda x:x.summary()) Ether / IP / TCP 172.31.100.222:ssh > 172.31.100.149:57386 PA / Raw Ether / IP / TCP 172.31.100.222:http > 172.31.100.149:59163 RA Ether / IP / TCP 172.31.100.222:http > 172.31.100.149:59163 RA Ether / IP / TCP 172.31.100.222:http > 172.31.100.149:59163 RA Ether / IP / TCP 172.31.100.222:http > 172.31.100.149:59164 RA Ether / IP / TCP 172.31.100.222:http > 172.31.100.149:59164 RA |

|:----|

抓取目的地址网段为139.219.0.0/24的报文：

| >>> sniff(filter="dst net 139.219", prn=lambda x:x.summary()) Ether / IP / TCP 172.31.100.222:ssh > 172.31.100.149:57386 PA / Raw Ether / IP / TCP 172.31.100.149:58879 > 139.219.224.155:https PA / Raw Ether / IP / TCP 172.31.100.149:58879 > 139.219.224.155:https PA / Raw Ether / IP / TCP 172.31.100.149:58879 > 139.219.224.155:https PA / Raw Ether / IP / TCP 172.31.100.149:58879 > 139.219.224.155:https A / Padding Ether / IP / TCP 172.31.100.149:58879 > 139.219.224.155:https PA / Raw Ether / IP / TCP 172.31.100.149:58879 > 139.219.224.155:https PA / Raw |

|:----|

抓取非ICMP的报文：

| >>> sniff(filter="not icmp", prn=lambda x:x.summary()) Ether / IP / TCP 172.31.100.222:ssh > 172.31.100.149:57386 PA / Raw Ether / IP / TCP 172.31.100.222:ssh > 172.31.100.149:57386 PA / Raw Ether / IP / TCP 172.31.100.149:57386 > 172.31.100.222:ssh A / Padding Ether / IP / TCP 172.31.100.222:ssh > 172.31.100.149:57386 PA / Raw |

|:----|

prn函数举例：

将抓取到的报文的summary打印出来：

| >>> sniff(filter="icmp", prn=lambda x:x.summary(), count=10) Ether / IP / TCP 172.31.100.222:ssh > 172.31.100.149:57212 PA / Raw Ether / IP / ICMP 172.31.100.149 > 172.31.100.222 echo-request 0 / Raw Ether / IP / ICMP 172.31.100.222 > 172.31.100.149 echo-reply 0 / Raw Ether / IP / ICMP 172.31.100.149 > 172.31.100.222 echo-request 0 / Raw Ether / IP / ICMP 172.31.100.222 > 172.31.100.149 echo-reply 0 / Raw Ether / IP / ICMP 172.31.100.149 > 172.31.100.222 echo-request 0 / Raw Ether / IP / ICMP 172.31.100.222 > 172.31.100.149 echo-reply 0 / Raw Ether / IP / ICMP 172.31.100.149 > 172.31.100.222 echo-request 0 / Raw Ether / IP / ICMP 172.31.100.222 > 172.31.100.149 echo-reply 0 / Raw Ether / IP / ICMP 172.31.100.149 > 172.31.100.222 echo-request 0 / Raw <Sniffed: TCP:1 UDP:0 ICMP:9 Other:0> |

|:----|

将所有IP报文的源地址打印出来：

| >>> sniff(filter="icmp", prn=lambda x:xIP.src, count=10) 172.31.100.222 172.31.100.149 172.31.100.222 172.31.100.149 172.31.100.222 172.31.100.149 172.31.100.222 172.31.100.149 172.31.100.222 172.31.100.149 <Sniffed: TCP:1 UDP:0 ICMP:9 Other:0> |

|:----|

或者定义一个回调函数：

| def packet_callback(packet): print packet.show() sniff(prn=packet_callback, count=10) |

|:----|

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