python network sniffer

Data engineers, common database and network service sharing, python code, and Network Service python As a data engineer or data analyst, he often deals with various types of data. The access to data is unavoidable. below, I will share the data connection configuration model that I often use in my work for your communic

Python crawler practice (5) -------- Zhaopin network and python Zhaopin Network A few days ago, I helped my colleagues crawl some information about data analysis jobs on the Internet by Zhaopin. He said that he had to perform some data analysis. Now he has helped him crawl the job. I originally wanted to use Scrapy for

I have been learning Python for a long time, but I have never felt any obvious indication. After thinking about it recently, I still feel that my goal is not clear enough. I don't know what I can do after learning it (for amateurs, learning programming is a hobby). So I am reading everything, but nothing works. Finally, let's take a look at network programming. Please advise what you need to learn. I have b

Python has been learning for a long time, but it has never felt obvious. Recently think about, or feel that their goals are not clear enough, not clear what can be done after learning (amateur, learning programming is a hobby), so everything is looking at, but nothing has become. Summed up the next, to determine in the network programming in depth, trouble everyone to teach under what kind of things to lear

of the IP packet is 20 bytes, plus the embedded TCP packet, the total length becomes 5000 bytes.7 Ethernet ProtocolFinally, the IP packet is embedded in the Ethernet packet. Ethernet packet needs to set the MAC address of both sides, the sender is the local network card MAC address, the receiver is the gateway 192.168.1.1 MAC address (through the ARP protocol).The data portion of the Ethernet packet, the maximum length is 1500 bytes, and now the IP p

DHCP client service ports, and a port number No. 546. Dns:dns (domain Name System), a distributed database that maps domain names and IP addresses on the Internet, makes it easier for users to access the Internet without remembering the number of IP strings that can be read directly by the machine. The process of obtaining the IP address of the host name through the hostname is called Domain name resolution (or hostname resolution). The DNS protocol runs on top of the UDP protocol, using th

After reading this section, I suddenly got to know some incomprehension issues in the python network programming learning Notes (1). at least I understood what happened to socket. Here, we will not take notes on the origin of socket and directly go to the topic. 1. create a socket To create a socket object, you must understand the communication type and protocol family. The communication type specifies the

net.py get input and output of network interface Copy Code code as follows: #!/usr/bin/env Python Import time Import Sys If Len (SYS.ARGV) > 1:INTERFACE = sys.argv[1]ElseINTERFACE = ' eth0 'STATS = []print ' Interface: ', Interface Def RX ():Ifstat = open ('/proc/net/dev '). ReadLines ()For interface in Ifstat:If INTERFACE in INTERFACE:Stat = float (Interface.split () [1])Stats[0:] = [s

How to learn Python + how to effectively utilize Python-related network resources + How to take advantage of Python's own manual (Python Manual)almost forgot to say, before looking at all the content below, for the Python version does not understand, please be sure to check

1, the establishment of TCP connection method The client typically takes two steps to establish a TCP connection, and the server process takes four steps, as shown in the following comparison. Steps TCP Client TCP Server The first step Set up a socket Object Establish Socket Object Step Two Call Connect () to establish a connection to the server Set Socket options (optional) Step Three No Bind to a port (can also be

The server is very similar to the client program. The client program is learned in the previous section. This section describes how to use socket to establish TCP and UDP servers. 1. TCP connection establishment method Generally, two steps are required for the client to establish a TCP connection, and four steps are required for the server process. for details, see the comparison below. Procedure TCP client TCP server Step 1 CreateSocketObject CreateSocketObject

1. TCP connection Establishment Method Generally, two steps are required for the client to establish a TCP connection, and four steps are required for the server process. For details, see the comparison below. Procedure TCP client TCP Server Step 1 CreateSocketObject CreateSocketObject Step 2 CallConnect ()Establish a connection with the server SetSocketOptional) Step 3 None Bind to a port (or a specified Nic) Step 4 None