實(shí)驗(yàn)報(bào)告udp多播編程

1：UDP時(shí)間：2015年4月14日星期二，第3，4 地點(diǎn)：理工樓學(xué)號(hào) ：班級(jí)：工程8IPSenderReceiver，SenderWindowsVC++1.VisualC++6.0，MultiCast。在此項(xiàng)目工SenderReceiverReceiverSOCK_DGRAMSocket①在WinSock1平臺(tái)上加入多播組需要調(diào)用setsockopt函數(shù)，同時(shí)設(shè)置IP_ADD_MEMBERSHIP②WinSock2WSAJoinLeaf，SOCKETWSAJoinLeaf(SOCKETs,conststructsockaddrFAR*name,intLPWSABUFlpCallerData,LPWSABUFlpCalleeData,LPQOSlpSQOS,LPQOSlpGQOS,DWORDdwFlags);Sender#define #define #define #define bSender=FALSE, //Actasasender?bLoopBack=FALSE; //Disableloopback?DWORDdwInterface, //Localinterfacetobindto //Multicastgrouptojoin //Numberofmessagestosend/receiveshortiPort; //Portnumbertouse//Function:// Printusageinformationandvoidusage(char{printf("usage:%s-s-m:str-p:int-i:str-l-n:int\n",Actasserver(senddata);receiveDotteddecimalmulticastIPaddres"toThedefaultgroupis:%s\n",PortnumbertoThedefaultportis:%d\n",Localinterfacetobindto;bydefaultuseDisableNumberofmessagesto}//Function:// Parsethecommandlineargumentsandsetsomeglobal depedingonthevoidValidateArgs(intargc,char{ 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 //Porttoif(strlen(argv[i])>iPort=atoi(&argv[i][3]);case'l': //DisableloopbackbLoopBack=TRUE;case'n': //Numberofmessagestosend/recvdwCount=atoi(&argv[i][3]);}}}}//Function:// Parsethecommandlinearguments,loadtheWinsock createasocketandjointhemulticastgroup.Ifthis isrunasasenderthenbeginsendingmessagestothe group;otherwise,callrecvfrom()toreadmessagessentto intmain(intargc,char{ struct sock, len=sizeof(structsockaddr_in), //Parsethecommandlineandloadif(WSAStartup(MAKEWORD(2,2),&wsd)!={return-1;}//Createthesocket.InWinsock2youdohavetospecify//multicastattributesthatthissocketwillbeusedif((sock=WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,||WSA_FLAG_OVERLAPPED))=={printf("socketfailedwith:%d\n",WSAGetLastError());return-}//Bindtothelocalinterface.Thisisdonetoreceivedata.local.sin_family=AF_INET; =if(bind(sock,(structsockaddr*)&local,sizeof(local))==SOCKET_ERROR){printf("bindfailedwith:%d\n",WSAGetLastError());return-1;}//SetuptheSOCKADDR_INstructuredescribingthe//groupwewantto = =//ChangetheTTLtosomethingmoreoptval=(char*)&optval,sizeof(int))=={return-1;}//Disableloopbackifif{optval=if(setsockopt(sock,IPPROTO_IP,IP_MULTICAST_LOOP,(char*)&optval,sizeof(optval))==SOCKET_ERROR){return-1;}}//Jointhemulticast NotethatsockMisnot//tosendorreceivedata.Itisusedwhenyouwant//leavethemulticastgroup.Yousimplycall//onif((sockM=WSAJoinLeaf(sock,(SOCKADDR*)&remote,sizeof(remote),NULL,NULL,NULL,NULL,JL_BOTH))=={printf("WSAJoinLeaf()failed:%d\n",WSAGetLastError());return-1;}if //{//Receivefor(i=0;i<dwCount;{if((ret=recvfrom(sock,recvbuf,BUFSIZE,(structsockaddr*)&from,&len))=={printf("recvfromfailedwith:%d\n",return-}recvbuf[ret]=printf("RECV:'%s'from<%s>\n",recvbuf,}} //{//Sendfor(i=0;i<dwCount;{sprintf(sendbuf,"server1:Thisisatest:%d",if(sendto(sock,(char*)sendbuf,strlen(sendbuf),0,(structsockaddr*)&remote,sizeof(remote))==