当前位置： 首页 > news >正文

湖南营销型网站建设 A磐石网络WordPress清爽主题

news 2025/11/7 5:31:17
湖南营销型网站建设 A磐石网络,WordPress清爽主题,仪征市建设局网站,网站模板中文Linux C语言 32-网络编程之UDP例程 本节关键字：C语言 网络编程 UDP协议 套接字操作 服务端 客户端 相关C库函数：setsockopt, socket, bind, recvfrom, sendto, close 相关接口介绍 Linux C语言 30-套接字操作 例程执行任务说明 本例程中服务端的任务…

Linux C语言 32-网络编程之UDP例程

本节关键字：C语言 网络编程 UDP协议 套接字操作 服务端 客户端
相关C库函数：setsockopt, socket, bind, recvfrom, sendto, close

相关接口介绍

Linux C语言 30-套接字操作

例程执行任务说明

本例程中服务端的任务：

  • 等待客户端发来消息
  • 读取客户端发来的消息并回复

本例程中客户端的任务：

  • 创建1个客户端
  • 间隔1秒，发送消息告知服务端自己的包编号

UDP协议服务端例程实现

// udpserver.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>void msleep(int msecs);
int  getOneServerSocket(const char *ip, int port);int main(int argc, char *argv[])
{int rc, rxn, txn, srvfd, port;int addrLen;struct sockaddr_in remoteAddr;char ip[32] = {0};char rxBuffer[1024] = {0};char txBuffer[1024] = {0};if (argc != 3){printf("please input correct arguments:\n");printf("\tudpserver ip port\n\n");return -1;}// 解析ip和portstrcpy(ip, argv[1]);port = atoi(argv[2]);printf("ip: %s, port: %d\n", ip, port);// 创建套接字srvfd = getOneServerSocket(ip, port);addrLen = sizeof(remoteAddr);while (1){bzero(rxBuffer, sizeof(rxBuffer));rxn = recvfrom(srvfd, rxBuffer, sizeof(rxBuffer)-1, 0, (struct sockaddr*)&remoteAddr, &addrLen);if (rxn > 0){printf("client[%s:%d] socket:%d  %s\n", inet_ntoa(remoteAddr.sin_addr), ntohs(remoteAddr.sin_port), srvfd, rxBuffer);bzero(txBuffer, sizeof(txBuffer));sprintf(txBuffer, "server reply client[%s:%d] -> %s", inet_ntoa(remoteAddr.sin_addr), ntohs(remoteAddr.sin_port), rxBuffer);sendto(srvfd, txBuffer, strlen(txBuffer), 0, (struct sockaddr*)&remoteAddr, addrLen);}}close(srvfd);return 0;
}void msleep(int msecs)
{struct timeval stoptime;stoptime.tv_sec  = (int)(msecs/1000);stoptime.tv_usec = (int)(msecs%1000)*1000;select(0, 0, 0, 0, &stoptime);
}int getOneServerSocket(const char *ip, int port)
{int rc, srvfd, reused, timeout;struct sockaddr_in addr;srvfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);if (srvfd == -1){perror("create socket");exit(-1);}// 设置端口复用reused = 1;rc = setsockopt(srvfd, SOL_SOCKET, SO_REUSEADDR, &reused, sizeof(reused));if (rc == -1){perror("SO_REUSEDADDR");goto EXIT;}// 设置发送超时限制timeout = 1000; // 1秒setsockopt(srvfd, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout));if (rc == -1){perror("SO_SNDTIMEO");goto EXIT;}// 套接字绑定本地的ip和portaddr.sin_family = AF_INET;addr.sin_port = htons(port);addr.sin_addr.s_addr = inet_addr(ip);bzero(addr.sin_zero, sizeof(addr.sin_zero));rc = bind(srvfd, (struct sockaddr*)&addr, sizeof(addr));if (rc == -1){perror("bind");goto EXIT;}return srvfd;EXIT:close(srvfd);exit(-1);
}

UDP协议客户端例程实现

// udpclient.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>void msleep(int msecs);
int  getOneClientSocket(const char *ip, int port, struct sockaddr_in *addr);int main(int argc, char *argv[])
{int rc, rxn, txn, clifd, port;int addrLen;struct sockaddr_in serverAddr;struct sockaddr_in remoteAddr;unsigned int packet_id = 0;char ip[32] = {0};char rxBuffer[1024] = {0};char txBuffer[1024] = {0};if (argc != 3){printf("please input correct arguments:\n");printf("\tudpserver ip port\n\n");return -1;}// 解析ip和portstrcpy(ip, argv[1]);port = atoi(argv[2]);printf("ip: %s, port: %d\n", ip, port);// 创建套接字clifd = getOneClientSocket(ip, port, &serverAddr);addrLen = sizeof(remoteAddr);while (1){bzero(txBuffer, sizeof(txBuffer));sprintf(txBuffer, "Hello, i'm client[%d], packet id: %d", clifd, packet_id++);sendto(clifd, txBuffer, strlen(txBuffer), 0, (struct sockaddr*)&serverAddr, addrLen);bzero(rxBuffer, sizeof(rxBuffer));rxn = recvfrom(clifd, rxBuffer, sizeof(rxBuffer)-1, 0, (struct sockaddr*)&remoteAddr, &addrLen);if (rxn > 0){printf("server[%s:%d] -> %s\n", inet_ntoa(remoteAddr.sin_addr), ntohs(remoteAddr.sin_port), rxBuffer);}msleep(1000);}return 0;
}void msleep(int msecs)
{struct timeval stoptime;stoptime.tv_sec  = (int)(msecs/1000);stoptime.tv_usec = (int)(msecs%1000)*1000;select(0, 0, 0, 0, &stoptime);
}int getOneClientSocket(const char *ip, int port, struct sockaddr_in *addr)
{int rc, srvfd, reused, timeout;srvfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);if (srvfd == -1){perror("create socket");exit(-1);}// 设置端口复用reused = 1;rc = setsockopt(srvfd, SOL_SOCKET, SO_REUSEADDR, &reused, sizeof(reused));if (rc == -1){perror("SO_REUSEDADDR");goto EXIT;}// 设置发送超时限制timeout = 1000; // 1秒setsockopt(srvfd, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout));if (rc == -1){perror("SO_SNDTIMEO");goto EXIT;}// 套接字绑定本地的ip和portaddr->sin_family = AF_INET;addr->sin_port = htons(port);addr->sin_addr.s_addr = inet_addr(ip);bzero(addr->sin_zero, sizeof(addr->sin_zero));return srvfd;EXIT:close(srvfd);exit(-1);
}

例程编译及运行

UDP服务端例程编译及运行结果
$ gcc udpserver.c -o udpserver
$ ./udpserver 0.0.0.0 88888
ip: 0.0.0.0, port: 88888
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 0
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 1
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 2
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 3
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 4
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 5
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 6
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 7
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 8
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 9
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 10
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 11
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 12
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 13
client[192.168.146.128:52147] socket:3  Hello, i'm client[3], packet id: 14
UDP客户端例程编译及运行结果
# 服务端IP为192.168.146.128
$ gcc udpclient.c -o udpclient
$ ./udpclient 192.168.146.128 88888
ip: 192.168.146.128, port: 88888
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 0
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 1
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 2
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 3
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 4
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 5
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 6
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 7
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 8
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 9
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 10
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 11
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 12
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 13
server[192.168.146.128:23352] -> server reply client[192.168.146.128:52147] -> Hello, i'm client[3], packet id: 14
http://www.yayakq.cn/news/390851/

相关文章：

  • 建设工程招聘信息网站怡康医药网站建设方案
  • wordpress 网站的占有广州关键词搜索排名
  • 钢琴网站建设原则wordpress 页面 浏览量
  • 如何验证网站所有权网站被清空了怎么办
  • 新河镇网站制作广州站电话
  • 电子商务网站推广四川省安全社区建设网站
  • 中英文网站建设2017三五互联做网站怎么样
  • 南通wap网站建设wordpress是php语言
  • 电子商务网站建设论文建立个人网站费用
  • 株洲网站制作公司在哪里智能化网站建设
  • 如何做推广网站下饶网站建设
  • 专业网站建设机构如何给自己网站做外链
  • 建设菠菜网站德阳做网站
  • 服务周到的上海网站建设公大型门户网站建设一般多少钱
  • 在东营怎么建网站东海县建设局网站
  • 哈尔滨网站建设网站开发法国企业网站建设
  • 天坛装修公司口碑怎么样长沙排名优化公司
  • 淄博网站价格龙岗网站建设报价
  • 网站品牌打造邯郸市嘉禾网络科技
  • 水头做网站的公司三字顺口名字公司
  • 西宁北京网站建设wordpress 字数统计
  • 枣庄网站设计网站制作公司源码
  • 高明网站设计案例企业网站最底下做的是什么
  • 九八智能建站wordpress筛选插件
  • 宝塔windows建设网站国家鼓励做网站的行业
  • 江苏省住房和建设部网站首页安徽建工招标与采购网
  • 生态环境工程公司网站建设六安网络营销
  • 禹州 什么团购网站做的好如何在百度搜索到自己的网站
  • 山东建设执业资格注册中心网站官网潍坊关键词优化平台
  • 博客网站建设方案书网站制作经典案例