基于廣播模型的通信程序設(shè)計(jì)

1、集美大學(xué)計(jì)算機(jī)工程學(xué)院實(shí)驗(yàn)報(bào)告課程名稱：TCP/IP協(xié)議與通信程序設(shè)計(jì)班級(jí)：實(shí)驗(yàn)成績：實(shí)驗(yàn)項(xiàng)目名稱：基于廣播模型的通信程序設(shè)計(jì)學(xué)號(hào)：上機(jī)實(shí)踐日期：2016-06-02實(shí)驗(yàn)項(xiàng)目編號(hào)：11組號(hào)：1上機(jī)實(shí)踐時(shí)間：2學(xué)時(shí)一、 實(shí)驗(yàn)?zāi)康?了解廣播編程的原理，掌握使用廣播套接字編寫通信程序二、 實(shí)驗(yàn)內(nèi)容與設(shè)計(jì)思想編寫基于廣播通信模型的服務(wù)器端和客戶端通信程序，要求編程實(shí)現(xiàn)服務(wù)器端與客戶端之間廣播數(shù)據(jù)傳遞。服務(wù)器端向所有客戶端發(fā)送“今天是個(gè)好日子！”廣播消息，客戶端收到并在本地顯示給用戶。在上述通信程序的基礎(chǔ)上進(jìn)行改進(jìn)，實(shí)現(xiàn)服務(wù)器端發(fā)送的“今天是個(gè)好日子！”廣播消息，僅限于本組內(nèi)所有主機(jī)才能接收到。三、 實(shí)

2、驗(yàn)使用環(huán)境操作系統(tǒng)： Microsoft Windows XP SP2編程環(huán)境： Visual C+ 6.0四、實(shí)驗(yàn)步驟和調(diào)試過程廣播源代碼：服務(wù)器端：#include "initsock.h"#include "stdio.h"#include <windows.h>CInitSock theSock;void main()/創(chuàng)建UDP套接字SOCK_DGRAMSOCKET s = :socket(AF_INET, SOCK_DGRAM, 0);/ 設(shè)置套接字的工作選項(xiàng)，有效SO_BROADCAST選項(xiàng)BOOL bBroadcast = T

3、RUE;/ SOL_SOCKET表示應(yīng)用層級(jí)別，SO_BROADCAST表示工作選項(xiàng)為設(shè)置套接字傳播和接收廣播消息:setsockopt(s, SOL_SOCKET, SO_BROADCAST, (char*)&bBroadcast, sizeof(BOOL);/ 設(shè)置廣播地址，這里的廣播端口號(hào)是4567SOCKADDR_IN bcast;bcast.sin_family = AF_INET;bcast.sin_addr.s_addr = INADDR_BROADCAST; / :inet_addr("255.255.255.255");bcast.sin_port

4、 = htons(4567); /端口號(hào)用來說明參與通信的進(jìn)程/ 發(fā)送廣播char sz = "今天是個(gè)好日子！ rn"printf(" 發(fā)送廣播數(shù)據(jù)： n %s n",sz);while(TRUE):sendto(s, sz, strlen(sz), 0, (sockaddr*)&bcast, sizeof(bcast);:Sleep(5000);客戶端：#include "initsock.h"#include "stdio.h"#include <windows.h>CInitSock t

5、heSock;void main()SOCKET s = :socket(AF_INET, SOCK_DGRAM, 0);/ 首先要綁定一個(gè)本地地址，指明廣播端口號(hào)SOCKADDR_IN sin;sin.sin_family = AF_INET;sin.sin_addr.S_un.S_addr = INADDR_ANY;sin.sin_port = :ntohs(4567);if(:bind(s, (sockaddr*)&sin, sizeof(sin) = SOCKET_ERROR)printf(" bind() failed n");return;/ 接收廣播p

6、rintf(" 開始在4567端口接收廣播數(shù)據(jù). 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);執(zhí)行結(jié)果：組播源代碼：服務(wù)器端：#include "initsock.h"#include "st

7、dio.h"#include <windows.h>CInitSock theSock;void main()/創(chuàng)建UDP套接字SOCK_DGRAMSOCKET s = :socket(AF_INET, SOCK_DGRAM, 0);/ 設(shè)置套接字的工作選項(xiàng)，有效SO_BROADCAST選項(xiàng)BOOL bBroadcast = TRUE;/ SOL_SOCKET表示應(yīng)用層級(jí)別，SO_BROADCAST表示工作選項(xiàng)為設(shè)置套接字傳播和接收廣播消息:setsockopt(s, SOL_SOCKET, SO_BROADCAST, (char*)&bBroadcast, si

8、zeof(BOOL);/ 設(shè)置廣播地址，這里的廣播端口號(hào)（電臺(tái)）是4567SOCKADDR_IN bcast;bcast.sin_family = AF_INET;bcast.sin_addr.s_addr =:inet_addr("234.64.71.88");bcast.sin_port = htons(4567);/端口號(hào)用來說明參與通信的進(jìn)程/ 發(fā)送廣播printf("服務(wù)器端開始向4567端口發(fā)送多播數(shù)據(jù). n n");char sz = "今天是個(gè)好日子（第一組）rn"printf("發(fā)送多播數(shù)據(jù)n%s n&qu

9、ot;,sz);while(TRUE):sendto(s, sz, strlen(sz), 0, (sockaddr*)&bcast, sizeof(bcast);:Sleep(5000);客戶端：#include "Initsock.h"#include <stdio.h>#include <windows.h>#include <Ws2tcpip.h>struct ip_mreq_sourcestruct in_addr imr_multiaddr;struct in_addr imr_sourceaddr; struct i

10、n_addr imr_interface; ;#define IP_ADD_SOURCE_MEMBERSHIP 15/ 初始化Winsock庫CInitSock theSock;void main()/SOCKET s = :socket(AF_INET, SOCK_DGRAM, 0);SOCKET s = :socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);/ 允許其它進(jìn)程使用綁定的地址BOOL bReuse = TRUE;:setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&bReuse, sizeof(B

11、OOL);/ 綁定到4567端口sockaddr_in si;si.sin_family = AF_INET;si.sin_port = :ntohs(4567);si.sin_addr.S_un.S_addr = INADDR_ANY;:bind(s, (sockaddr*)&si, sizeof(si);/ 設(shè)置ip_mreq_source結(jié)構(gòu)ip_mreq_sourcemcast;mcast.imr_interface.s_addr = :inet_addr("192.168.73.136");/本地IP地址接口mcast.imr_multiaddr.s_ad

12、dr = :inet_addr("234.64.71.88"); / 多播地址為234.64.71.88 mcast.imr_sourceaddr.s_addr = :inet_addr("192.168.73.136"); /（帶源地址）添加源地址/設(shè)置套接字選項(xiàng)為網(wǎng)絡(luò)層級(jí)別IPPROTO_IP，相應(yīng)的工作選項(xiàng)為加入多播IP_ADD_MEMBERSHIP:setsockopt(s, IPPROTO_IP, IP_ADD_SOURCE_MEMBERSHIP, (char*)&mcast, sizeof(mcast);/ 接收多播組數(shù)據(jù)printf

13、("客戶端開始接收多播組234.64.71.88上的數(shù)據(jù). n");char buf1280;int nAddrLen = sizeof(si);while(TRUE)int nRet = :recvfrom(s, buf, strlen(buf), 0, (sockaddr*)&si, &nAddrLen);if(nRet != SOCKET_ERROR)bufnRet = '0'printf(buf);elseint n = :WSAGetLastError();break;執(zhí)行結(jié)果：五、實(shí)驗(yàn)小結(jié)1. 進(jìn)行廣播通信時(shí)接收程序（即要接收數(shù)據(jù)的客戶端）只需要綁定到特定的端口號(hào)。調(diào)用recvfrom函數(shù)即可接收到廣播數(shù)據(jù)，其中端口號(hào)用來說明參與通信的進(jìn)程。2. TCP通信中recv函