server.c

client socket include <sys/types.h> include <sys/socket.h> include <stdio.h> i

include <sys/types.h>
include <sys/socket.h>
include <stdio.h>
include <netinet/in.h>
include <arpa/inet.h>
include <unistd.h>

 int main()
 {
 int server_sockfd, client_sockfd;
 int server_len, client_len;
 struct sockaddr_in server_address;
 struct sockaddr_in client_address;

 server_sockfd = socket(AF_INET, SOCK_STREAM, 0);

 server_address.sin_family = AF_INET;
 server_address.sin_addr.s_addr = inet_addr("127.0.0.1");
 server_address.sin_port = 9734;
 server_len = sizeof(server_address);
 bind(server_sockfd, (struct sockaddr *)&server_address, server_len);

 listen(server_sockfd, 5);
 while(1) {
 char ch;

 printf("server waiting\n");

 client_len = sizeof(client_address);
 client_sockfd = accept(server_sockfd,
 (struct sockaddr *)&client_address, &client_len);

 read(client_sockfd, &ch, 1);
 ch++;
 write(client_sockfd, &ch, 1);
 close(client_sockfd);
 }
 }