Linuxcsocket source code case

Linuxcsocket source code case

Service end

# Include <sys/types. h> # include <sys/socket. h> # include <stdio. h> # include <netinet/in. h> # include <arpa/inet. h> # include <unistd. h> # include <string. h> # include <stdlib. h> # include <fcntl. h> # include <sys/shm. h> # define MYPORT 8887 # define QUEUE 20 # define BUFFER_SIZE 1024int main () {// defines sockfd int server_sockfd = socket (AF_INET, SOCK_STREAM, 0 ); /// define sockaddr_in struct sockaddr_in server_sockaddr; server_sockaddr.sin_family = AF_INET; outputs = htons (MYPORT); outputs = htonl (INADDR_ANY); // bind, 0 is returned successfully, -1 if (bind (server_sockfd, (struct sockaddr *) & server_sockaddr, sizeof (server_sockaddr) =-1) {perror ("bind "); exit (1);} // listen, 0 is returned for success, and-1 if (listen (server_sockfd, QUEUE) =-1) {perror ("listen") is returned for error "); exit (1) ;}/// client socket char buffer [BUFFER_SIZE]; struct sockaddr_in client_addr; socklen_t length = sizeof (client_addr); // a non-negative descriptive word is returned successfully, -1 int conn = accept (server_sockfd, (struct sockaddr *) & client_addr, & length); if (conn <0) {perror ("connect "); exit (1);} while (1) {memset (buffer, 0, sizeof (buffer); int len = recv (conn, buffer, sizeof (buffer), 0 ); if (strcmp (buffer, "exit \ n") = 0) break; fputs (buffer, stdout); send (conn, buffer, len, 0 );} close (conn); close (server_sockfd); return 0 ;}

Client

# Include <sys/types. h> # include <sys/socket. h> # include <stdio. h> # include <netinet/in. h> # include <arpa/inet. h> # include <unistd. h> # include <string. h> # include <stdlib. h> # include <fcntl. h> # include <sys/shm. h ># define MYPORT 8887 # define BUFFER_SIZE 1024int main () {// defines sockfd int sock_cli = socket (AF_INET, SOCK_STREAM, 0); // defines sockaddr_in struct sockaddr_in servaddr; memset (& servaddr, 0, sizeof (servaddr )); Servaddr. sin_family = AF_INET; servaddr. sin_port = htons (MYPORT); // server port servaddr. sin_addr.s_addr = inet_addr ("127.0.0.1"); // server ip // connect to the server, 0 is returned for success, and-1 is returned for error if (connect (sock_cli, (struct sockaddr *) & servaddr, sizeof (servaddr) <0) {perror ("connect"); exit (1) ;}char sendbuf [BUFFER_SIZE]; char recvbuf [BUFFER_SIZE]; while (fgets (sendbuf, sizeof (sendbuf), stdin )! = NULL) {send (sock_cli, sendbuf, strlen (sendbuf), 0); // send if (strcmp (sendbuf, "exit \ n") = 0) break; recv (sock_cli, recvbuf, sizeof (recvbuf), 0); // receives fputs (recvbuf, stdout); memset (sendbuf, 0, sizeof (sendbuf )); memset (recvbuf, 0, sizeof (recvbuf);} close (sock_cli); return 0 ;}

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