python network sniffer

#!/usr/bin/Envpython#-*-coding=utf-8-*-#Using GPL v2.7#Author: [email protected]126. Com#python Monitor network card traffic"""1, the realization principle: obtains the system information through the SNMP protocol, then carries on the corresponding computation and the format, the final output result2, special note: SNMP is required on the monitored machine.Yum Install-Y net-snmp*installation"""#!/usr/bin/py

. Successful return none, Failure throws an exception. internally, the send is called recursively, sending all the content. Sk.sendto (string[,flag],address)Sends the data to the socket, address is a tuple in the form of (Ipaddr,port), specifying the remote address. The return value is the number of bytes sent. This function is mainly used for UDP protocol.Sk.settimeout (Timeout)Sets the timeout period for the socket operation, and timeout is a floating-point number in seconds. A value of None i

This article mainly introduces Python to parse the 115 network disk link instance in the source code of the webpage, and mainly uses the regular expression re module to implement this function, for more information, see the example in this article. Share it with you for your reference. The specific method is analyzed as follows: In the 1.txt, is the web page http://bbs.pediy.com/showthread.php? T0000144788

Recently, a generic tcpclient test gadget was developed using Python for network programming. In the network programming using socket, how to determine whether to send a message to the end is completed, is a socket network development must consider a problem. Here, a brief introduction to the discriminant data received

': Break Else: Conn.sendall (bytes (ret_str+'yes, okay.', encoding='Utf-8')) Print(address)ClientImportSocketobj=Socket.socket ()#Connect to ServerObj.connect (('127.0.0.1', 9999,)) STRs= OBJ.RECV (1024)#Receive server-side information, 1024 indicates the most to receive 1024 bytes, more than 1024 can not be received at a time to complete#The recv here is also blocked, after receiving information from the server, will continue to execute the following codePrint(Str

) #向客户端发送消息UdpSock. Close ()Client:#coding =utf-8from Socket Import *import sysreload (SYS) sys.setdefaultencoding (' UTF8 ') host= "192.168.1.66" port= 12348udpsock=socket (Af_inet,sock_dgram) while True: data=raw_input ("Fast Typing:") if not data: Break Udpsock.sendto (data, (Host,port)) #无需connect, direct access to host Data,addr=udpsock.recvfrom (1024x768) print via host IP and Port (Data.decode ("UTF-8")) Udpsock.close ()P

Python's network request, mainly makes the HTTP protocol class interface call, carries on the interface test and so on.One, Urllib library, Python embedded library, not very useful. fromUrllibImportRequest,parseImportJSON#url = ' http://baidu.com '#req = request.urlopen (URL) #打开一个url#content = Req.read (). Decode ()#FW = open (' nnzhp.html ', ' W ', encoding= ' utf-8 ')#fw.write (content)##网络爬虫, get some u

1. Write the basic TCP connection, know the steps to write TCP, such as creating a socket, binding port, port multiplexing, and so on, a little understanding of TCP, know each field of the protocol, understand the three-time handshake.2. Understand the basic server concurrency model, such as multi-process, multi-threading, Io multiplexing3. Learn about some network libraries such as twistedIt is unclear whether you are referring to the underlying

Python programming source code. zipThe Python language foundation of the famous network security lecturer. 1-2. Language introduction environment installation. exeThe Python language foundation of the famous network security lecturer. 3. Digital. exeThe

1. Reuse Socket Address:#-*-Coding:utf-8-*-# If you run a Python socket server on a port and then terminate the connection once, you cannot use this port.#!usr/bin/env Python# Python Network Programming Cookbook--chapter-1# Optimized for Python 2.7# It may run on any other v

-called "invariant" of a tuple is to say that each element of a tuple, pointing to never change. That point ' a ', it cannot be changed to point to ' b ', pointing to a list, cannot be changed to point to other objects, but the list itself is variable! # tuple returns the value of the outside of the parentheses can be omitted t = (' a ', ' b ', [' c ', ' d ']) L = t[2]l[0] = ' E '; l[1] = ' F ' Print t # ==> (' a ', ' b ', [' e ', ' F ']) # The only difference between creating a tuple and creati

RelatedArticle:You can also find information about network resources in the following articles.Example in Python: A Basic verification tutorialUrllib2 is a python component used to obtain URLs (Uniform Resource Locators. He provides a very simple interface in the form of urlopen functions,This is the ability to obtain URLs using different protocols. It also provi