Source code for various TCP network servers in Linux

The source code of various TCP network servers in Linux-general Linux technology-Linux programming and kernel information. The following is a detailed description. Everyone knows the compiling steps of various network server programs and knows that there are two types of network servers: cyclic services and concurrent services. Here is a summary of the source code.

First of all, the steps for Loop Network Server programming are as follows:


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This type of server model is a typical cyclic service. Without the multi-process/thread technology, the Service throughput is limited, if the data of the previous connection service is not sent and received, the subsequent Connections cannot be processed. Therefore, there is usually a multi-process technology that enables a new process to process a new connection, and the listening socket continues to listen.

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* Filename: source code for various TCP network servers in Linux
* Purpose: records the source code of various tcp service programs in Linux.
* Wrote by: zhoulifa (zhoulifa@163.com) Zhou Lifa (http://zhoulifa.bokee.com)
Linux enthusiasts Linux knowledge disseminators sohowhose developers are best at C Language
* Date time: 2006-07-04 22:00:00
* Note: Anyone can copy the code and use these documents, including your commercial use.
* But follow the GPL
* Hope: more and more people are expected to contribute to the development of science and technology.
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The source code of a loop TCP Service (because fork is used for multi-process services, this service is also useful in reality) as follows:

CODE:/* ---------------------- source CODE start --------------------------------------------*/ # Include # Include # Include # Include # Include # Include # Include # Include /*************************************** ****************************** * Filename: cycletcpserver. c * Purpose: a circular tcp server program * Tidied by: zhoulifa (zhoulifa@163.com) Zhou Lifa (http://zhoulifa.bokee.com) Linux enthusiasts Linux knowledge disseminators sohowhose developers are best at C Language * Date time: 2006-07-04 22:00:00 * Note: Anyone can copy the code and use these documents, including your commercial use. * But follow the GPL * Thanks to: Google.com **************************************** *****************************/ Int main (int argc, char ** argv) { Int sockfd, new_fd;/* listen to socket: sock_fd, data transmission socket: new_fd */ Struct sockaddr_in my_addr;/* local address information */ Struct sockaddr_in their_addr;/* customer address information */ Unsigned int sin_size, myport, lisnum; If (argv [1]) myport = atoi (argv [1]); Else myport = 7838; If (argv [2]) lisnum = atoi (argv [2]); Else lisnum = 2; If (sockfd = socket (PF_INET, SOCK_STREAM, 0) =-1 ){ Perror ("socket "); Exit (1 ); } My_addr.sin_family = PF_INET; My_addr.sin_port = htons (myport ); My_addr.sin_addr.s_addr = INADDR_ANY; Bzero (& (my_addr.sin_zero), 0 ); If (bind (sockfd, (struct sockaddr *) & my_addr, sizeof (struct sockaddr) =-1 ){ Perror ("bind "); Exit (1 ); } If (listen (sockfd, lisnum) =-1 ){ Perror ("listen "); Exit (1 ); } While (1 ){ Sin_size = sizeof (struct sockaddr_in ); If (new_fd = accept (sockfd, (struct sockaddr *) & their_addr, & sin_size) =-1 ){ Perror ("accept "); Continue; } Printf ("server: got connection from % s \ n", inet_ntoa (their_addr.sin_addr )); If (! Fork () {/* child process code segment */ If (send (new_fd, "Hello, world! \ N ", 14, 0) =-1 ){ Perror ("send "); Close (new_fd ); Exit (0 ); } } Close (new_fd);/* the socket is no longer required by the parent process */ Waitpid (-1, NULL, WNOHANG);/* wait until the child process ends and clear the resources occupied by the child process */ } } /* ---------------------- Source code end --------------------------------------------*/