linux network programming book

embedded Linux Network Programming (III.)--UDP programming model UDP programming Model:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/83/F8/wKioL1eCUczx3fu_AACwf5ri25Q159.png "title=" Picture 6.png "alt=" Wkiol1ecuczx3fu_aacwf5ri25q159.png "/>The UDP loop server

out and was finally given the HTTP service. In this way, a piece of data is eventually delivered to the destination application. Of course, we still omit a lot of detail in this process. It is worth noting that the process of data communication is bidirectional, so the PC sends the webserver, in order for the service to interact properly, the data will return, so there is actually a data return process here we no longer analyze, the principle is similar. Top 0

, ignoring routing settings for the underlying protocol. (5) returnThe execution successfully returns the number of bytes actually sent, with an error of 1, and the error code is stored in errno.A successful execution simply means that the data is written to the socket's buffer and does not indicate that the data has been successfully sent over the network to the destination.8. RECV () Receive data#include #include ssize_t recv (int conn_fd,void

; structsockaddr_in client_addr; memset (AMP;CLIENT_ADDR,0,sizeof(CLIENT_ADDR)); size_t Client_addrlen=sizeof(CLIENT_ADDR); CLIENTST= Accept (St, (structSOCKADDR *) client_addr, Client_addrlen); if(CLIENTST = =-1) {printf ("Accept failed! Error message:%s\n", Strerror (errno)); GotoEND; } //recv Message Charbuf[1024x768] = {0 }; intMflag =0; //Open the file streamFILE * PFA =NULL; PFA= fopen ("/home/test/2/1.dat","a"); if(PFA = =NULL) {printf ("Open the file failed! Error message:%s\n", St

Theoretical basis Stream: Call fopen Open file after file read and write operation will create a stream, socket network communication will also create a flow, the flow is a data transmission for the purpose of a bridge, in fact, refers to the flow of data, we can understand the data sent and received the path. I/O stream separation: refers to the transmission of data and receive streams separately, controlled by 2 different objects instea

-to close the socket Connect Program1#include 2#include 3#include 4#include inch.h>5#include 6#include 7 8 intMain ()9 {Ten intsock,size; Oneuint16_t Port =8000; A Const Char*ip ="192.168.7.118"; - Charbuf[1024x768] ="Songlongfei"; - structsockaddr_in addr; thememset (AMP;ADDR,0,sizeof(addr)); -Sock = socket (Af_inet,sock_stream,0); -addr.sin_family =af_inet; -Addr.sin_port =htons (port); +Inet_pton (af_inet,ip,addr.sin_addr); - if(Connect (sock,structsockaddr*) addr,si

If you want to enter the magical network programming world of Linux, please come with me. Before learning, I only need you to have a certain degree of knowledge in C language programming. The author will describe how to write a network Program Basic knowledge. The so-called

Review database MySQL backup and recovery:show databases;User spdb1;Show tables;Perform a backup in the Mysql/bin directory:./mysqldump-u root-p spdb1 >/home/spdb1.bakYou will be prompted to enter the password for the user root.Delete a database drop databases spdb1;Recovery database: Mysql-u root-p database name You need to create a new empty database before recovering the database, otherwise error. Create a new user under/mysql/bin: the Create database name;SSH Introduction:SSH (Secure Shell)

First, open the network communication port, choose the TCP protocol LISTENFD = socket (af_inet,sock_stream,0); Second, initialize the SERVADDR, and make the network byte sequence conversion Bzero (servaddr,sizeof (SERVADDR)); servaddr.sin_family = af_inet; SERVADDR.SIN_ADDR.S_ADDR = htonl (Inaddr_any); Servaddr.sin_port = htons (Serv_port); Third, bind IP and port Bind (LISTENFD, (struct soc

4intMainintargcChar*argv[]) {structSockaddr_in local,client;intLenints_s =-1, s_c=-1;/ * Initialize the address structure * /Bzero (local,sizeof(local));/ * Clear 0 * /Bzero (client,sizeof(client));/ * Clear 0 * /local.sin_family = af_inet; Local.sin_port = htons (port); LOCAL.SIN_ADDR.S_ADDR = htonl (-1);/ * Create a Socket descriptor * /s_s = socket (af_inet, Sock_stream,0);/ * Set non-blocking mode * /Fcntl (S_S,F_SETFL, O_nonblock);/ * Listen * /Listen (s_s, BACKLOG); for(;;) {/* Poll th

:%s (error%d) \ n", Strerror (errno), errno); Exit (0); } printf ("wait echo from server:\n"); Sleep (2); Recvsize= Recv (SOCKETFD, Recvbuf,sizeof(RECVBUF),0); if(Recvsize 0) {printf ("recvive Echo error:%s (error%d) \ n", Strerror (errno), errno); Exit (0); } printf ("%s", RECVBUF); Close (SOCKETFD);}Several issues encountered in this process:1, (client) errno 111:connection refusedThis problem indicates that the client did not find the port that should be connected and needed to: Ensu

Linux-Network C Programming epoll function, linux-cepoll As mentioned above, epoll is equivalent to a mobile phone if take-out is taken from different places of 100. When the take-out arrives, the deliveryman can notify you so that each take-out can go a lot less. How does it implement these functions? Epoll Functions

If you want to enter the magical network programming world of Linux, please come with me. before learning, I only need you to have a certain degree of knowledge in C language programming. I will describe the basic knowledge required to write a network program. The so-called

If you want to enter the magical network programming world of Linux, please come with me. Before learning, I only need you to have a certain degree of knowledge in C language programming. I will describe the basic knowledge required to write a network program. The so-called

In the socket network programming, we need to understand some of the necessary knowledge, such as what is the address structure of the SOCKET,IPV4, socket type and so on, or come up directly to see the code will faint, the original Learning Network programming, reading examples, always feel the

Article title: handle IP addresses in Linux network programming. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Author: Cao Yuanqi 　　

Stevens's UNIX Network programming Volume 1: Socket Networking API is a well-known UNIX network programming book. The use of a unp.h reference, if not set up the corresponding library, even if the introduction of the header file is useless. So first you have to configure the

One of the main features of the Linux system is that his network is very powerful. With the increasing popularity of the network, web-based applications will be more and more. In this network era, mastered the Linux network

With the development and popularization of Intenet, networks are widely used in embedded systems. more and more embedded devices use Linux operating systems. Linux is a free operating system with open source code and is highly portable. Therefore, it is increasingly important to study Socket network programming based o

Article title: Proxy Source Code Analysis-talk about how to learn linux network programming. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open sou