实验报告udp多播编程

课程网络协议编 实验名称UDP多播编 班级7 专业计算机科学与技术学号 实验日期:2015年4月14日报告退发(订正、重做) WindowsSocket（UDP）WindowsSocketAPIUDP据，ReceiverSenderVisualC++6.0,Win7#include<windows.h>#include<winsock.h>#pragma#include<stdio.h>#include<stdlib.h>#defineMCASTADDR "234.5.6.7"//缺省多播组地址#defineMCASTPORT #defineBUFSIZE BOOLbSender=FALSE, //Actassender?bLoopBack=FALSE; //Disableloopback?DWORDdwInterface, //Localinterfacetobindto //Multicastgrouptojoin //Numberofmessagestosend/receiveshort //Portnumberto//Function:// Printusageinformationandvoidusage(char{printf("usage:%s-s-m:str-p:int-i:str-l-n:int\n",printf("-s Actasserver(senddata);otherwise\n"); receivedata.\n");printf("-m:strDotteddecimalmulticastIPaddrestojoin\n"); Thedefaultgroupis:%s\n",MCASTADDR);printf("-p:intPortnumbertoprintf("Thedefaultportis:%d\n",MCASTPORT);printf("-i:strLocalinterfacetobindto;bydefault\n");printf("useINADDRY_ANY\n");printf("- Disableprintf("-n:intNumberofmessagestosend/receive\n");}//Function:// Parsethecommandlineargumentsandsetsomeglobal dependingonthevoidValidateArgs(intargc,char**argv)//{ dwInterface=iPort=MCASTPORT;dwCount=for(i=1;i<argc;{if((argv[i][0]=='-')||(argv[i][0]=={switch{case's': //SenderbSender=TRUE;case'm': //Multicastgrouptojoinif(strlen(argv[i])>3)dwMulticastGroup=inet_addr(&argv[i][3]);case'i': //Localinterfacetouseif(strlen(argv[i])>3)dwInterface=inet_addr(&argv[i][3]);case'p': //Portnumbertouseif(strlen(argv[i])>3)iPort=atoi(&argv[i][3]);case'l': //Disableloopback?bLoopBack=TRUE;case'n': //Numberofmessagestosend/recvdwCount=atoi(&argv[i][3]);}}}}//Function:// Parsethecommandlinearguments,loadtheWinsock createasocketandjointhemulticastgroup.Ifthis isstartedasasenderthenbeginsendingmessagesto multicastgroup;otherwise,callrecvfrom()toread senttotheintmain(intargc,char{ structsockaddr_instructip_mreq len=sizeof(structsockaddr_in), //Parsethecommandlineandload//Winsock1.1if(WSAStartup(MAKEWORD(1,1),&wsd)!={return-1;}//Createthesocket.InWinsock1youdon'tneedany//flagstoindicateif((sockM=socket(AF_INET,SOCK_DGRAM,0))=={printf("socketfailedwith:%d\n",WSAGetLastError());return-}if(!bSender){local.sin_family=local.sin_port=if(bind(sockM,(structsockaddr*)&local,sizeof(local))==SOCKET_ERROR){printf("bindfailedwith:%d\n",WSAGetLastError());return-1;}}//Setuptheim_reqstructuretoindicatewhatgroupwe//tojoinaswellasthe =htons(iPort);//im_reqmcast.imr_interface.s_addr=dwInterface;(char*)&mcast,sizeof(mcast))==SOCKET_ERROR){printf("setsockopt(IP_ADD_MEMBERSHIP)failed:%d\n",return-}//SettheTTLtosomethingelse.ThedefaultTTLisliveTTL，//每当有路由器转发该报文时，TTL文//即使没有到达目的地，也立即宣布optval=(char*)&optval,sizeof(int))==SOCKET_ERROR){return-}//Disabletheloopbackifselected.NotethatonNT4and//youcannotdisableif{optval=(char*)&optval,sizeof(optval))==SOCKET_ERROR){return-}}if // //Receivesomefor(i=0;i<dwCount;{if((ret=recvfrom(sockM,recvbuf,BUFSIZE,(structsockaddr*)&from,&len))=={printf("recvfromfailedwith:%d\n",return-1;}recvbuf[ret]=printf("RECV:'%s'from<%s>\n",recvbuf,}} //{//Sendsomefor(i=0;i<dwCount;{sprintf(sendbuf,"server1:Thisisatest:%d",if(sendto(sockM,(char*)sendbuf,strlen(sendbuf),0,(structsockaddr*)&remote,sizeof(remote))=={printf("sendtofailedwith:return-}}}//Dropgroup(char*)&mcast,sizeof(mcast))==SOCKET_ERROR){printf("setsockopt(IP_DROP_MEMBERSHIP)failed:%d\n",}return0;}#include<winsock2.h>#include#pragma#include<stdio.h>#include<stdlib.h>#defineMCASTADDR #defineMCASTPORT #define BOOLbSender=FALSE, //Actasasender?bLoopBack= //DisableDWORDdwInterface, //绑定的本地接口 //连接的多播组 short //使用的端//Function:// Printusageinformationandvoidusage(char{printf("usage:%s-s-m:str-p:int-i:str-l-n:int\n",printf("-s Actasserver(senddata);otherwise\n"); receivedata.\n");printf("-m:str DotteddecimalmulticastIPaddres""tojoin\n"); Thedefaultgroupis:%s\n",MCASTADDR);printf("-p:int Portnumbertouse\n"); Thedefaultportis:%d\n",MCASTPORT);printf("-i:str Localinterfacetobindto;bydefault\n"); useINADDRY_ANY\n");printf("- Disableprintf("-n:int Numberofmessagestosend/receive\n");}voidValidateArgs(intargc,char**argv)//{ dwInterface=iPort=MCASTPORT;dwCount=for(i=1;i<argc{if((argv[i][0]=='-')||(argv[i][0]=={switch{case's'://SenderbSender=TRUE;case'm'://Multicastgrouptojoinif(strlen(argv[i])>3)dwMulticastGroup=inet_addr(&argv[i][3]);case'i'://Localinterfacetouseif(strlen(argv[i])>3)dwInterface=inet_addr(&argv[i][3]);case'p'://Porttouseif(strlen(argv[i])>iPort=atoi(&argv[i][3]);case'l'://DisableloopbackbLoopBack=TRUE;case'n'://Numberofmessagestosend/recvdwCount=atoi(&argv[i][3]);}}}}//Winsockintmain(intargc,char{ structsockaddr_in sock, len=sizeof(structsockaddr_in), Winsockif(WSAStartup(MAKEWORD(2,2),&wsd)!={return-1;}//Winsock2if((sock=WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,||WSA_FLAG_OVERLAPPED))=={printf("socketfailedwith:%d\n",WSAGetLastError());return-}local.sin_family=local.sin_port=if(bind(sock,(structsockaddr*)&local,sizeof(local))==SOCKET_ERROR){printf("bindfailedwith:%d\n",WSAGetLastError());return-1;}//SetuptheSOCKADDR_INstructuredescribingthe//groupwewantto =AF_INET; =//ChangetheTTLtosomethingmoreoptval=(char*)&optval,sizeof(int))==SOCKET_ERROR){return-1;}//Disableloopbackifif{optval=(char*)&optval,sizeof(optval))==SOCKET_ERROR){return-1;}}//Jointhemulticastgroup.NotethatsockMisnot//tosendorreceivedata.Itisusedwhenyouwant//leavethemulticastgroup.Yousimplycall//onif((sockM=WSAJoinLeaf(sock,(SOCKADDR*)&remote,sizeof(remote),NULL,NULL,NULL,NULL,JL_BOTH))=={pri