摘自：https://www.cnblogs.com/yjunzhang/p/http_raw_socket.html
在实验中需要自己构造单独的HTTP数据报文，而使用SOCK_STREAM进行发送数据包，需要进行完整的TCP交互。
因此想使用原始套接字进行编程，直接构造数据包，并在IP层进行发送，即采用SOCK_RAW进行数据发送。
使用SOCK_RAW的优势是，可以对数据包进行完整的修改，可以处理IP层上的所有数据包，对各字段进行修改，而不受UDP和TCP的限制。
下面开始构造HTTP数据包，
IP层和TCP层使用python的Impacket库，http内容自行填写。
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#!/usr/bin/env python
#-------------------------------------------------------------------------------
# Name: raw_http.py
# Purpose: construct a raw http get packet
#
# Author: Yangjun
#
# Created: 08/02/2014
# Copyright: (c) Yangjun 2014
# Licence: <your licence>
#-------------------------------------------------------------------------------
import
sys
import
socket
from
impacket
import
ImpactDecoder, ImpactPacket
def
main():
if
len
(sys.argv) <
3
:
print
"Use: %s <src ip> <dst ip>"
%
sys.argv[
0
]
print
"Use: %s <src ip> <dst ip> <cnt>"
%
sys.argv[
0
]
sys.exit(
1
)
elif
len
(sys.argv)
=
=
3
:
src
=
sys.argv[
1
]
dst
=
sys.argv[
2
]
cnt
=
1
elif
len
(sys.argv)
=
=
4
:
src
=
sys.argv[
1
]
dst
=
sys.argv[
2
]
cnt
=
sys.argv[
3
]
else
:
print
"Input error!"
sys.exit(
1
)
#print src, dst
ip
=
ImpactPacket.IP()
ip.set_ip_src(src)
ip.set_ip_dst(dst)
# Create a new ICMP packet of type ECHO.
icmp
=
ImpactPacket.ICMP()
tcp
=
ImpactPacket.TCP()
tcp.set_th_sport(
55968
)
tcp.set_th_dport(
80
)
tcp.set_th_seq(
1
)
tcp.set_th_ack(
1
)
tcp.set_th_flags(
0x18
)
tcp.set_th_win(
64
)
tcp.contains( ImpactPacket.Data(
"GET /att/DIYLife/41264/528 HTTP/1.1\r\nHost: 192.168.111.1\r\nAccept-Encoding: identity\r\n\r\n"
))
ip.contains(tcp)
# Open a raw socket. Special permissions are usually required.
s
=
socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_TCP)
s.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL,
1
)
seq_id
=
0
while
cnt >
=
1
:
# Calculate its checksum.
seq_id
=
seq_id
+
1
tcp.set_th_seq(seq_id)
tcp.calculate_checksum()
# Send it to the target host.
s.sendto(ip.get_packet(), (dst,
80
))
cnt
=
cnt
-
1
if
__name__
=
=
'__main__'
:
main()
|
运行后抓包如下：
在实验中需要自己构造单独的HTTP数据报文，而使用SOCK_STREAM进行发送数据包，需要进行完整的TCP交互。
因此想使用原始套接字进行编程，直接构造数据包，并在IP层进行发送，即采用SOCK_RAW进行数据发送。
使用SOCK_RAW的优势是，可以对数据包进行完整的修改，可以处理IP层上的所有数据包，对各字段进行修改，而不受UDP和TCP的限制。
下面开始构造HTTP数据包，
IP层和TCP层使用python的Impacket库，http内容自行填写。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
#!/usr/bin/env python
#-------------------------------------------------------------------------------
# Name: raw_http.py
# Purpose: construct a raw http get packet
#
# Author: Yangjun
#
# Created: 08/02/2014
# Copyright: (c) Yangjun 2014
# Licence: <your licence>
#-------------------------------------------------------------------------------
import
sys
import
socket
from
impacket
import
ImpactDecoder, ImpactPacket
def
main():
if
len
(sys.argv) <
3
:
print
"Use: %s <src ip> <dst ip>"
%
sys.argv[
0
]
print
"Use: %s <src ip> <dst ip> <cnt>"
%
sys.argv[
0
]
sys.exit(
1
)
elif
len
(sys.argv)
=
=
3
:
src
=
sys.argv[
1
]
dst
=
sys.argv[
2
]
cnt
=
1
elif
len
(sys.argv)
=
=
4
:
src
=
sys.argv[
1
]
dst
=
sys.argv[
2
]
cnt
=
sys.argv[
3
]
else
:
print
"Input error!"
sys.exit(
1
)
#print src, dst
ip
=
ImpactPacket.IP()
ip.set_ip_src(src)
ip.set_ip_dst(dst)
# Create a new ICMP packet of type ECHO.
icmp
=
ImpactPacket.ICMP()
tcp
=
ImpactPacket.TCP()
tcp.set_th_sport(
55968
)
tcp.set_th_dport(
80
)
tcp.set_th_seq(
1
)
tcp.set_th_ack(
1
)
tcp.set_th_flags(
0x18
)
tcp.set_th_win(
64
)
tcp.contains( ImpactPacket.Data(
"GET /att/DIYLife/41264/528 HTTP/1.1\r\nHost: 192.168.111.1\r\nAccept-Encoding: identity\r\n\r\n"
))
ip.contains(tcp)
# Open a raw socket. Special permissions are usually required.
s
=
socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_TCP)
s.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL,
1
)
seq_id
=
0
while
cnt >
=
1
:
# Calculate its checksum.
seq_id
=
seq_id
+
1
tcp.set_th_seq(seq_id)
tcp.calculate_checksum()
# Send it to the target host.
s.sendto(ip.get_packet(), (dst,
80
))
cnt
=
cnt
-
1
if
__name__
=
=
'__main__'
:
main()
|
运行后抓包如下：