scapy kamene 发送 SYN 数据包答案

【问题标题】：scapy kamene sending SYN packetscapy kamene 发送 SYN 数据包
【发布时间】：2020-03-24 00:11:09
【问题描述】：

我尝试使用以下代码将 TCP SYN 数据包从远程 IP 地址发送到我的本地 IP 地址。

from kamene.all import *
print("Send SYN from remote to local")
ip=IP(src=remote_ip,dst=local_ip,frag=0,tos=0x0)
tcp=TCP(sport=remote_port,dport=local_port, flags="S", seq=1111)
SYN_pkt = ip/tcp
SYNACK_pkt = srp(SYN_pkt,verbose=0)
ls(SYNACK_pkt)

但是代码给出了以下错误。

Send SYN from remote to local
WARNING: DNS RR prematured end (ofs=16116, len=26)
WARNING:kamene.runtime:DNS RR prematured end (ofs=16116, len=26)
WARNING: wrong value: DNS.ancount=51411
WARNING:kamene.runtime:wrong value: DNS.ancount=51411
WARNING: wrong value: DNS.nscount=41893
WARNING:kamene.runtime:wrong value: DNS.nscount=41893
WARNING: more wrong value: DNS.arcount=778
WARNING:kamene.runtime:more wrong value: DNS.arcount=778
Not a packet class. Type 'ls()' to list packet classes.

如果我将 srp() 更改为 sr1() 以发送/接收数据包，则会出现以下错误。

Send SYN from remote to local
WARNING: Mac address to reach destination not found. Using broadcast.
WARNING:kamene.runtime:Mac address to reach destination not found. Using broadcast.
WARNING: DNS RR prematured end (ofs=16116, len=26)
WARNING:kamene.runtime:DNS RR prematured end(ofs=16116, len=26)
WARNING: wrong value: DNS.ancount=51411
WARNING:kamene.runtime:wrong value: DNS.ancount=51411
WARNING: wrong value: DNS.nscount=41893
WARNING:kamene.runtime:wrong value: DNS.nscount=41893
WARNING: more wrong value: DNS.arcount=778
WARNING:kamene.runtime:more wrong value: DNS.arcount=778

【问题讨论】：

标签： tcp send scapy packet syn

【解决方案1】：

DNS RR prematured 是 Scapy 的一个 DNS 错误。

它是was fixed ages ago，但是因为你使用的是kamene而不是Scapy，所以你还是会遇到它。

切换到 Scapy。见https://stackoverflow.com/a/54578802/5459467

【讨论】：