recvfrom

Recently saw OvS user-state code, in receiving the kernel state information, the use of Epoll multiplexing mechanism, it is very puzzled, so from the Internet to find some information, learning a bit of "UNIX Network into Volume 1: Socket Network

The "UDP protocol" and "Socket data transfer" are described in the previous article. The UDP protocol differs from the TCP protocol in that it is a non-connected, unreliable transport layer protocol. In UDP socket-based programming, data transfer is

UDP programming based on non-connectionSimilarly, when developing UDP-based applications, the main process is as follows: For non-connected UDP applications in the development process, the service side and the client's operating process is basically

The premise is that, When receiving a receipt or reading data, take two steps. 1. Wait for the data to be ready. 2. Copy data from the kernel to the process. For a network io (socket) (Here we use read as an example), it involves two system objects,

Five I/O modes-blocking (default IO mode), non-blocking (common language pipeline), I/O multiplexing (IO multiplexing scenario), signal I/O, asynchronous I/OFive I/O modes:"1" Blocking I/O (I/O operations under Linux are blocking I/O by default,

This article is senlie original, reproduced Please retain this address: http://blog.csdn.net/zhengsenlie Initial code: # Include "unp. H" intmain (INT argc, char ** argv) {intsockfd; struct sockaddr_inservaddr; If (argc! = 2) err_quit ("Usage:

Explore UDP socket programming and udp socket programming UDP and TCP are in the same layer network model, that is, the transport layer. There are many applications based on the two. Common TCP-based applications include HTTP and Telnet, UDP-based

Five I/O modes:[1] blocking I/O[2] non-blocking I/O[3] I/O multiplexing[4] signal-driven I/O (sigio)[5] asynchronous I/O Generally, there are two steps for a program to input data:1. Wait for data to be read2. Copy data from the system kernel to the

  1. Overview Some common applications written using UDP include DNS (Domain Name System), NFS (Network File System), and SNMP (Simple Network Management Protocol) Provides typical function calls for UDP client/server programs:       2. recvfrom

Here, the thread model refers to the thread model design related to Winsock. Some problems in the design process of this software involve Winsock. In order to design the thread model well, we must understand the internal working mechanism of socket.

Before we say the I/O model, let's talk about the concepts of synchronous, asynchronous, blocking, non-blocking, which are four ways to call:Synchronization: When a function call is made, the call does not return until the result is obtained, and

Linux interprocess communication-Using datagram socketsprevious article, Linux interprocess communication--using flow sockets to introduce some basic content about sockets (sockets), and to explain the use of the flow sockets, this article will tell

Transformation of the data storage precedence orderThe computer data store has two byte precedence: The high byte takes precedence (called the big-endian mode) and the low-order byte precedence (known as the small-end mode). The low address of

1 Concept DescriptionBefore interpreting, there are a few concepts to be explained: User space and kernel space Process switching Blocking of processes File descriptor Cache IO 1.1 User space and kernel spaceNow that

Linux Network Programming 4--Personal SummaryTCP and UDP communication flow The basic steps for TCP communication are as follows: Server: Socket---BIND---listen---while (1) {---accept---recv---send---close---}------close Client:

Two Protocols TCP and UDPThe former can be understood as a guaranteed connection, and the latter is the pursuit of fast connections.Of course, the last point is a bit too absolute, but now do not have to boil too much, because the first socket

I. FirewallOverviewNetwork Firewall is a technology used to enhance access control between networks and prevent external network users from illegally accessing internal networks and network resources through external networks, special network

What is socket 　　A socket interface is an API of a TCP/IP network. A socket interface defines many functions or routines. programmers can use it to develop applications on a TCP/IP network. To learn TCP/IP network programming on the internet, you

UDP compared to TCP, each has advantages and disadvantages, down to enumerate the shortcomings of UDP:1.UDP is an unreliable protocol (lack of flow control)Instance code:Server.c#include #include #include #include #include int main (){int

39 Network-related functions (vii)--LIVE555 source Reading (iv) network 39 Network-related functions (vii)--LIVE555 source Reading (iv) network Brief introduction Readsocket) read data from the socket interface