我正在使用scapy,我想创建一个数据包并计算其校验和而不发送它。有办法吗?
谢谢。
最佳答案
创建后,您需要从数据包中删除.chksum
值;然后调用.show2()
>>> from scapy.layers.inet import IP
>>> from scapy.layers.inet import ICMP
>>> from scapy.layers.inet import TCP
>>> target = "10.9.8.7"
>>> ttl = 64
>>> id = 32711
>>> sport = 2927
>>> dport = 80
>>> pak = IP(dst=target, src = "100.99.98.97", ttl=ttl, flags="DF", id=id, len=1200, chksum = 0)/TCP(flags="S", sport=sport, dport=int(dport), options=[('Timestamp',(0,0))], chksum = 0)
>>> del pak[IP].chksum
>>> del pak[TCP].chksum
>>> pak.show2()
###[ IP ]###
version = 4L
ihl = 5L
tos = 0x0
len = 1200
id = 32711
flags = DF
frag = 0L
ttl = 64
proto = tcp
chksum = 0x9afd
src = 100.99.98.97
dst = 10.9.8.7
\options \
###[ TCP ]###
sport = 2927
dport = www
seq = 0
ack = 0
dataofs = 8L
reserved = 0L
flags = S
window = 8192
chksum = 0x2c0e
urgptr = 0
options = [('Timestamp', (0, 0)), ('EOL', None)]
>>>
关于python - 如何在不发送数据包的情况下计算数据包校验和?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/5953371/