Python Raw Socket使用示例(发送TCP SYN数据包)
说实话，Python真的不太适合做这种二进制的东西，天生没有指针，导致在C/C++很容易的东西在Python下就很麻烦。不过好像3.1有了原生的bytes类型，不知道能不能改变现状。
import sys
import time
import socket
import struct
import random
def SendPacketData (Buffer = None , DestIP = "127.0.0.1" , DestPort = 0) :
"""SendPacketData"""
if Buffer is None :
return False
try:
Socket = socket.socket(socket.AF_INET,socket.SOCK_RAW)
Socket.setsockopt(socket.IPPROTO_IP,socket.IP_HDRINCL,1)
Socket.setsockopt(socket.SOL_SOCKET,socket.SO_SNDTIMEO,2000)
except:
Socket.close()
return False
try:
Socket.sendto(Buffer,0,(DestIP , DestPort))
except:
Socket.close()
return True
def SetPacketAddress (Number = 1) :
"""SetPakcetAddress"""
return [".".join(["%d" % random.randint(1 , 0xFF) for i in range(0,4)]) for n in range(0 , Number)]
def SetPacketData (Length = 32) :
"""SetPacketData"""
return "".join(["%s" % chr(random.randint(0 , 255)) for n in range(Length)])
def SetPacketCheckSum (Buffer = None) :
"""SetPacketCheckSum"""
if Buffer == None :
return False
if len(Buffer) % 2 :
Buffer += '\0'
return ~sum([(ord(Buffer[n + 1]) << 8) + ord(Buffer[n]) for n in range(0 , len(Buffer) , 2)])
#or return ~sum([ord(Buffer[n]) + ord(Buffer[n + 1]) * 256 for n in range(0 , len(Buffer) , 2)])
def SynSendInit (DestIP = "127.0.0.1" , DestPort = 80) :
"""SynSendInit"""
IpHdrLen = 20
TcpHdrLen = 20
IpVerlen = (4 << 4 | IpHdrLen / 4)
IpTotal_len = socket.htons(IpHdrLen + TcpHdrLen)
IpDestIP = struct.unpack('i',socket.inet_aton(DestIP))[0]
IpSourceIP = struct.unpack('i',socket.inet_aton(SetPacketAddress()[0]))[0]
TcpSport = socket.htons(random.randint(1024 , 65000))
TcpDport = socket.htons(DestP
相关文档：
例1：
# _018
# This is a module (if write Chinese in a module, there will be a error)
def func1():
print 'This is function 1.'
def func2():
print 'This is function 2.'
def func3():
print 'This is function 3.'
# 019
# 使用“import”语句调用模块：
import _018_Module
_ ......
源代码下载：下载地址在这里
# 024
dict1 = {
'5064001':'Mememe',
'5064002':'tutu',
'5064003':'thrthr',
'5064004':'fofo'
}
print dict1['5064003']
# 也可以使用整型作为唯一的编号
dict2 = {
5064001:'Mememe',
506400 ......
源代码下载：下载地址在这里
# 025
# 序列的神奇之处在于你可以使用相同的方式tuple、list和string
se = ['a', 'b', 'c', 'd']
li = ['a', 'b', 'c', 'd']
tu = ('a', 'b', 'c', 'd')
string = 'abcd'
print se[1]
print li[1]
print tu[1]
print string[1]
# 序列的另外一个神奇之处在于，你可以使用负数进行索 ......
源代码下载：下载地址在这里
# 026
aList = ['1','2','3','4']
aListCopy = aList # 其实，这里仅仅复制了一个引用
del aList[0]
print aList
print aListCopy # 两个引用指向了了同一个对象，所以打印结果一样
aListCopy = aList[:] # 这是复制整个对象的有效方法
del aList[0]
print aList
print aListCopy
......
源代码下载：下载地址在这里
# 039
while True:
try:
x = int(raw_input('Input a number:'))
y = int(raw_input('Input a number:'))
z = x / y
except ValueError, ev:
print 'That is not a valid number.', ev
except ZeroDivisionError, ez:
print 'Di ......
