《网络程序设计》实验2-控制台方式Winsock数据报套接字广播通信

苏州大学实验报告院、系文正学院年级专业12物联网姓名高成波学号课程名称网络程序设计成绩指导教师陆建德同组实验者无实验日期第5页，共5页教务处制实 验 名 称实验二 控制台方式Winsock数据报套接字广播通信一. 实验内容（要求先完成题目，然后上机验证）本实验利用Winsock API进行控制台方式下数据报套接字的广播通信程序设计。参照实验2讲义中的操作步骤，完成该程序的设计，并上机调试。要求可以实现本机与同一网络内其它主机之间的广播通信。实验报告内容包括主要的实验代码、必要的注释或另外的说明文档以及实验结果与分析。发送端：#include #define BUF_SZIE 64#include winsock2.h#pragma comment(lib, ws2_32.lib)int main(int argc, char* argv)WSADATA wsd;/WSADATA变量SOCKET s;/套接字SOCKADDR_IN servAddr;/服务器地址charbufBUF_SZIE;/发送数据缓冲区/初始化套结字动态库if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)printf(WSAStartup failed!n);return 1;/创建套接字s = socket(AF_INET, SOCK_DGRAM, 0);if (s = INVALID_SOCKET)printf(socket() failed; %dn, WSAGetLastError();WSACleanup();/释放套接字资源return 1; BOOL bBroadcast = true;setsockopt(s, SOL_SOCKET, SO_BROADCAST, (char*)&bBroadcast, sizeof(BOOL); ZeroMemory(buf, BUF_SZIE);/服务器地址servAddr.sin_family =AF_INET;servAddr.sin_addr.s_addr = inet_addr(127.0.0.1);servAddr.sin_port = htons(short)5000);intnServAddlen = sizeof(servAddr);SOCKADDR_IN bcast;bcast.sin_addr.s_addr = INADDR_BROADCAST; bcast.sin_family = AF_INET;bcast.sin_port = htons(short)5000); /发送数据 printf( 开始向网络中发送广播数据. n n); char sz = This is just a broadcast test. I am Lao.nn; while(TRUE)sendto(s, sz, strlen(sz), 0, (sockaddr*)&bcast, sizeof(bcast);Sleep(5000);if(sendto(s, buf, BUF_SZIE, 0, (SOCKADDR*)&servAddr, nServAddlen) = SOCKET_ERROR)printf(recvfrom() failed: %dn, WSAGetLastError();closesocket(s);/关闭套接字WSACleanup();/释放套接字资源return 1;closesocket(s);/关闭套接字 WSACleanup();/释放套接字资源return 0;接收端：#include #define BUF_SZIE 64#include winsock2.h#pragma comment(lib, ws2_32.lib)int main(int argc, char* argv)WSADATAwsd;/WSADATA变量SOCKETs;/套接字SOCKADDR_INservAddr;/服务器地址charbufBUF_SZIE;/接收数据缓冲区/初始化套结字动态库if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)printf(WSAStartup failed!n);return 1;/创建套接字s = socket(AF_INET, SOCK_DGRAM, 0);if (s = INVALID_SOCKET)printf(socket() failed; %dn, WSAGetLastError();WSACleanup();/释放套接字资源return 1;int nErrCode;/返回值int nBufLen;/接收数据缓冲区大小int nOptlen = sizeof(nBufLen);/获取接收数据缓冲区大小nErrCode = getsockopt(s, SOL_SOCKET, SO_RCVBUF,(char*)&nBufLen, &nOptlen);if (SOCKET_ERROR = nErrCode)/处理失败/设置接收数据缓冲区为原来的10倍nBufLen *= 10;nErrCode = setsockopt(s, SOL_SOCKET, SO_RCVBUF,(char*)&nBufLen, nOptlen);if (SOCKET_ERROR = nErrCode)/失败处理/检查设置系统接收数据缓冲区是否成功int uiNewRcvBuf;getsockopt(s, SOL_SOCKET, SO_RCVBUF,(char*)&uiNewRcvBuf, &nOptlen);if (SOCKET_ERROR = nErrCode | uiNewRcvBuf != nBufLen)/失败处理/服务器地址servAddr.sin_family = AF_INET;servAddr.sin_port = htons(short)5000);/端口servAddr.sin_addr.s_addr = htonl(INADDR_ANY);/IP/绑定if (bind(s, (SOCKADDR *)&servAddr, sizeof(servAddr) = SOCKET_ERROR)printf(bind() failed: %dn, WSAGetLastError();closesocket(s);/关闭套接字WSACleanup();/释放套接字资源return 1;SOCKADDR_IN bcast;bcast.sin_addr.s_addr = INADDR_BROADCAST; bcast.sin_family = AF_INET;bcast.sin_port = htons(short)5000);/接收数据 printf( 开始接收广播数据. nn);SOCKADDR_IN addrRemote;int nLen = sizeof(addrRemote);char sz256;while(TRUE)int nRet = recvfrom(s, sz, 256, 0, (sockaddr*)&addrRemote, &nLen);if(nRet 0)sznRet = 0;printf(sz);closesocket(s);/关闭套接字WSACleanup();/释放套接字资源return 0;实验结果：设置