setsockopt

Network programming is how to realize the communication between two computers in the program, and the communication between the two computers is actually two inter-process communication, the communication between processes is mainly through the

Python simple construction of blocking single process, multi-process, multi-thread service, python multi-thread We can understand the working principle of apache in this way. 1 single-process TCP Service (congested)This is the most primitive service,

First, TCP/IP-related knowledge tcp/udp provide process address, two Protocols independent protocol Tcp:transmission Control Protocol Transmission Protocol, connection-oriented protocol, communications before communication channels (virtual link)

Socket programming practices in Linux (5) solutions for setting socket I/O timeout (1) Use the alarm function to set timeout   #include unsigned int alarm(unsigned int seconds);   Its main function is to set a signal transmission alarm.

For a connection-oriented TCP socket, in practice, it is common to check whether the peer is in the connection, the connection port in two cases:1, the connection is closed normally, call Close () shutdown () connection graceful Close, send and recv

An IP address is used to identify a host in the network. The IPV4 protocol represents a network address with a 32-bit unsigned number, including the network number and host number. The subnet mask indicates that the network number in the IP address

Using Write\send to send datagrams Eagain:resource temporarily unavailable error under LinuxFirst of all, I set the socket to asynchronous, and then when I use write to send data, the way is to loop a large amount of data, because it is asynchronous,

For connection-oriented TCP sockets, in practical applications, it is common to detect whether the peer is in a connection, and the connection port is in two cases:1, the connection is closed normally, call Close () shutdown () connection graceful

    Before analyzing the implementation of linux2.4.x network security, introduce some important concepts included in it: NetFilter, iptables, match, Target, Nf_sockopt_ops, and the implementation of network security function points. A detailed

Author: Brother Adon Created:2013-4-17 blog:http://blog.csdn.net/c359719435/ Copyright 2013 Arab http://blog.csdn.net/c359719435/ Use and reprint please indicate the source 1 set the size of the socket TCP buffer to doubt 1: Set SO_SNDBUF, so_rcvbuf

1. Method of establishing TCP connection The client typically takes two steps to establish a TCP connection, and the server process takes four steps, as shown in the comparison below. Steps TCP Client TCP Server

1.BackgroundWinsock Kernel buffer To optimize performance on the application layer, Winsock copies data buffers from application send calls to a Winsock Kernel buffer. Then, the stack uses it own heuristics (such as Nagle algorithm) to

Linux socket Programming Port problem (Bind error:address already in use)When programming Linux networks, each time you modify the source code and compile the runtime again, you often encounter the following usage errors:Bind error:address already

Here's a list of ways to judge if the remote has been disconnected: (from http://blog.csdn.net/god2469/article/details/8801356)Law One:When the recv () return value is less than or equal to 0 o'clock, the socket connection is broken. But also need

In a local area network, administrators often need to send a piece of information to a group of users. If you use a one-to send method, although it is feasible, but too cumbersome, there will often be missed, wrong hair. In order to solve this group

Recently wrote a program about sockets that need to be ported from Windows to Linux. Now the useful stuff to collect and record down.1. Header filesWindows under Winsock.h or winsock2.h;Linux under Netinet/in.h (mostly here), unistd.h (Close

In many cases, we need to use a fixed IP and port number to communicate, and by default, the client side of the port number is not fixed, by the system automatically allocate idle port number to communicate; But in many cases, some services to write

    ExploitationWinsock programming is implemented in synchronous and asynchronous modes with clear logic and focus on applications. In the preemptive multi-task operating system (WinNt and Win2K) the efficiency of using multi-thread mode basically

Python: simple construction of blocking single process, multi-process, multi-threaded service instances, python Multithreading We can understand the working principle of apache in this way. 1 single-process TCP Service (congested) This is the most

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