Linux网络编程示例1

来源：互联网发布：炉石盒子for mac 编辑：程序博客网时间：2024/05/17 08:19

客户端：

#include <stdio.h>

#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main(void)
{
   int sfd;
   int cfd;
   struct sockaddr_in client_add;
   char buf[50];
   int ret;
   //1.建立socket fd*/
   sfd = socket(AF_INET, SOCK_STREAM, 0);
   if(sfd < 0)
   {
           perror("socket");
           exit(1);
   }
   //填充sin
   client_add.sin_family = AF_INET;
   client_add.sin_port = htons(8888);
   client_add.sin_addr.s_addr = inet_addr("192.168.107.128");
   //3.建立连接
   cfd = connect(sfd, (struct sockaddr *)&client_add, sizeof(struct sockaddr));
   if(cfd < 0)
   {
           perror("connect");
           exit(1);
   }

   while(1)
   {
           sleep(1);
           //读取服务端发来的数据
           ret = read(sfd, buf, 50);
           if(0 == ret)
           {
                   printf("server is exit\n");
                   exit(1);
           }
           if(ret < 0)
           {
                   perror("read");
                   exit(1);
           }
           printf("buf = %s\n", buf);
   }
   close(sfd);

   return 0;
}

服务端

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

#define MAXLINE 50

int main(void)
{
       int s_fd;
       int b_fd;
       int l_fd;
       int a_fd;

       struct sockaddr_in server_add;
       //server_add清0
       memset(&server_add, 0, sizeof(server_add));
       char buf[MAXLINE];

       s_fd = socket(AF_INET, SOCK_STREAM, 0);
       if(s_fd < 0)
       {
               perror("socket");
               exit(1);
       }

       server_add.sin_family = AF_INET;
       server_add.sin_port = htons(8888);
       server_add.sin_addr.s_addr = inet_addr("192.168.107.128");
       //向系统登记你关心IP地址和端口号
       b_fd = bind(s_fd, (struct sockaddr *)&server_add, \
                       sizeof(struct sockaddr));
       if(b_fd < 0)
       {
               perror("bind");
               exit(1);
       }
       //监听
       l_fd = listen(s_fd, 5);
       if(l_fd < 0)
       {
               perror("listen");
               exit(1);
       }
       //接受客户端的连接
       a_fd = accept(s_fd, NULL, NULL);
       if(a_fd < 0)
       {
               perror("accept");
               exit(1);
       }
       printf("accept sucess\n");
       while(1)
       {
               fgets(buf, 50, stdin);
               write(a_fd, buf, 50);
       }
       close(s_fd);

       return 0;
}

编译：

gcc -o client client.c

gcc -o server server.c

先运行服务器

./server

再运行客户端

./client