zoukankan      html  css  js  c++  java
  • udp编程 实例

    server端

    #include <stdio.h>  
    #include <stdlib.h>  
    #include <unistd.h>  
    #include <errno.h>  
    #include <sys/types.h>  
    #include <sys/socket.h>  
    #include <netinet/in.h>  
    #include <string.h>  
      
    void server(int sock){  
        //1、建立接收缓存字节数组  
        char recvbuf[1024] = {0};  
        //2、定义socket  
        struct sockaddr_in peeraddr;  
        socklen_t peerlen;  
        int n;  
        while(1){  
            //  
            peerlen = sizeof(peeraddr);  
            //3、清空接收缓存数组  
            memset(recvbuf, 0, sizeof(recvbuf));  
            //4、开始接收数据  
            n = recvfrom(sock, recvbuf, sizeof(recvbuf), 0, (struct sockaddr *)&peeraddr, &peerlen);  
            //5、判断是否接收完整数据  
            if(n == -1){  
                    perror("recvfrom");   
                    exit(EXIT_FAILURE);   
            }else if(n > 0){  
                //6、成功接收数据,将缓存数据写入到标准输出,打印到控制台  
                fputs(recvbuf, stdout);  
                //7、想客户端回送接收到的数据(回显客户端输入的数据)  
                sendto(sock, recvbuf, n, 0, (struct sockaddr *)&peeraddr, peerlen);  
            }  
        }  
        //关闭socket  
        close(sock);  
    }  
      
    int main(void){  
            int sock;  
            //创建服务器socket  
            if((sock = socket(PF_INET, SOCK_DGRAM, 0)) < 0){  
                perror("socket error");  
                exit(EXIT_FAILURE);  
            }  
            //设置服务器socket参数  
            struct sockaddr_in servaddr;  
            memset(&servaddr, 0, sizeof(servaddr));  
            //设置socket的协议、端口以及地址  
            servaddr.sin_family = AF_INET;  
            servaddr.sin_port = htons(5188);  
            servaddr.sin_addr.s_addr = htonl(INADDR_ANY);  
          
            //将socket绑定地址  
            if(bind(sock, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0){  
                perror("bind error");  
                exit(EXIT_FAILURE);  
            }  
            server(sock);  
            return 0;  
    }

    client端

    #include <unistd.h>  
    #include <sys/types.h>  
    #include <netinet/in.h>  
    #include <arpa/inet.h>  
    #include <stdlib.h>  
    #include <stdio.h>  
    #include <errno.h>  
    #include <string.h>  
          
    void client(int sock){  
        //2、设置客户端socket参数  
        struct sockaddr_in servaddr;  
        memset(&servaddr, 0, sizeof(servaddr));  
        //3、设置传输协议、端口以及目的地址  
        servaddr.sin_family = AF_INET;  
        servaddr.sin_port = htons(5188);  
        servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");  
      
        //4、创建发送与接收缓存字节数组  
        int ret;  
        char sendbuf[1024] = {0};  
        char recvbuf[1024] = {0};  
        //5、开始发送数据(此处是发送来自标准输入的数据)  
        while(fgets(sendbuf, sizeof(sendbuf), stdin) != NULL){  
            sendto(sock, sendbuf, strlen(sendbuf), 0, (struct sockaddr *)&servaddr, sizeof(servaddr));  
            //6、开始接收数据,接收服务端返回的数据  
            ret = recvfrom(sock, recvbuf, sizeof(recvbuf), 0, NULL, NULL);  
            if(ret == -1){  
                perror("recvfrom");  
                exit(EXIT_FAILURE);  
            }  
      
            //fputs(recvbuf, stdout);       //将服务端返回的数据写入到标准输出  
              
            //7、清空发送与接收缓存  
            memset(sendbuf, 0, sizeof(sendbuf));  
            memset(recvbuf, 0, sizeof(recvbuf));  
        }  
        //8、关闭socket流  
        close(sock);  
    }  
      
    int main(void){  
        int sock;  
        //1.创建客户端的socket  
        if((sock = socket(PF_INET, SOCK_DGRAM, 0)) < 0){  
            perror("socket");  
            exit(EXIT_FAILURE);  
        }  
        client(sock);  
        return 0;  
    }

     参考:http://www.cnblogs.com/skyfsm/p/6287787.html?utm_source=itdadao&utm_medium=referral

    http://blog.csdn.net/chenlycly/article/details/51582257

  • 相关阅读:
    图像检索(image retrieval)- 11
    图像检索(image retrieval)- 10相关
    Mock.js简易教程,脱离后端独立开发,实现增删改查功能
    Azure Monitor (3) 对虚拟机磁盘设置自定义监控
    Azure Monitor (1) 概述
    Azure SQL Managed Instance (2) 备份SQL MI
    Azure Virtual Network (17) Private Link演示
    Azure Virtual Network (16) Private Link
    Azure Virtual Network (15) Service Endpoint演示
    Azure Virtual Network (14) Service Endpoint服务终结点
  • 原文地址:https://www.cnblogs.com/yorkyang/p/7772140.html
Copyright © 2011-2022 走看看