收到TCP ACK(带选项实验)后就像这样
我想生成TCP SYN + ACK(带选项实验和快速打开Cookie),如下所示
我想用scapy生成TCP SYN + ACK,所以我补充说
所以我在/ 254 : ("RFC3692-style Experiment","!HHH")
中添加了usr/share/pyshared/scapy/layers/inet.py
TCPOptions = (
{ 0 : ("EOL",None),
1 : ("NOP",None),
2 : ("MSS","!H"),
3 : ("WScale","!B"),
4 : ("SAckOK",None),
5 : ("SAck","!"),
8 : ("Timestamp","!II"),
14 : ("AltChkSum","!BH"),
15 : ("AltChkSumOpt",None),
25 : ("Mood","!p"),
254 : ("Experiment","!HHHH")
},
{ "EOL":0,
"NOP":1,
"MSS":2,
"WScale":3,
"SAckOK":4,
"SAck":5,
"Timestamp":8,
"AltChkSum":14,
"AltChkSumOpt":15,
"Mood":25,
"Experiment":254
} )
在收到TCP ACK(带有实验选项)后,我执行以下scapy功能:
TCP_SYNACK=TCP(sport=Ddport, dport=Ssport, flags="SA", seq=SeqNr, ack=AckNr, options=[('Experiment',0xf989,0xcafe,0x0102,0x0002),('NOP',0),('NOP',0)])
ANSWER=sr1(ip/TCP_SYNACK)
但是我遇到了一个python错误。看起来我在scapy的TCP数据包的选项字段的定义中犯了错误。我在做什么wron?
我认为您需要以tuple
格式指定可选字段的值,如下所示:
TCP_SYNACK = TCP(sport=Ddport, dport=Ssport, flags="SA", seq=SeqNr, ack=AckNr, options=[('Experiment', (0xf989, 0xcafe, 0x0102, 0x0002)), ('NOP', 0), ('NOP', 0)])
但我遇到了同样的问题。实际上,您可以将整数作为选项元组的第一个元素。我想放入一个哈希,所以我在scapy中使用了以下代码:
pkt = TCP(options=[("NOP", None), (19, "\xff\xff\xff\xff\xff\xff")])