套接字编程练习

时间：20150324时间：201503243-4姓名：林小燕班级：工程8WindowsSocketAPI,C/S2、客户机向服务器发送信息（如字符串“hello”）ModuleName:tcpclient.cppThissampleillustrateshowtodevelopasimpleTCP//thatcansendasimple"hello"messagetoaTCPserverlisteningonport5150.//Thissampleisimplementedasaconsole-styleapplicationandsimplyprints//statusmessagesaconnectionismadeandwhendataissenttothecl-otcpclienttcpclient.cppws2_32.libCommandLineOptions:tcpclient.exe<serverIP#include<stdio.h>#pragmacharvoid{Port=#pragmacharvoid{Port=5150;(argc{printf("USAGE:tcpclient<ServerIPaddress>.\n");}//InitializeWinsockversion{((Ret=WSAStartup(MAKEWORD(2,2),&wsaData))!=//NOTE:SinceWinsockfailedtoloadwecannotuse//todeterminetheerrorcodeasisnormallydonewhena//APIfails.Wehavetoreportthereturnstatusoftheprintf("WSAStartupfailedwitherror%d\n",Ret);}Createanewsockettomakeaclientconnection.((s=socket(AF_INET,SOCK_STREAM,=={printf("socketfailedwitherror%d\n",}SetupaSOCKADDR_INstructurethatwillbeusedtoconnecttoalisteningserveronport5150.Fordemonstrationpurposes,werequiredtheusertosupplyanIPaddressonthecommandlineandwefilledthisfieldinwiththedatafromtheuser.ServerAddr.sin_family=AF_INET;ServerAddr.sin_port=htons(Port);ServerAddr.sin_addr.s_addr=inet_addr(argv[1]);//Makeaconnectiontotheserverwithsockets.printf("Wearetryingtoconnectto%s:%d...\n",if(connect(s,(SOCKADDR*)&ServerAddr,=={printf("connectfailedwitherrorif(connect(s,(SOCKADDR*)&ServerAddr,=={printf("connectfailedwitherror%d\n",WSAGetLastError());}printf("Ourconnection//Atthispointyoucanstartsendingorreceivingdata//thesockets.Wewilljustsendahellomessagetotheserver.printf("Wewillnowtrytosendahellomessage.\n");if((Ret=send(s,"hello",6,0))=={printf("sendfailedwitherror%d\n",WSAGetLastError());}printf("Wesuccessfullysent%dbyte(s).\n",//Whenyouarefinishedsendingandreceivingdataon//youshouldclosetheprintf("Weareclosingtheconnection.\n");//Whenyourapplicationisfinishedhandlingthe//}ModuleName:tcpserver.cppThissampleillustrateshowtodevelopasimpleTCP//thatlistensforaTCPconnectiononport5150andreceivesdata.isimplementedasaconsole-styleapplicationandmessageswhenaconnectionisacceptedandwhendatabytheserver.cl-otcpservertcpserver.cppCommandLineNOTE:Therearenocommand#include<stdio.h>voidmain(void){NOTE:Therearenocommand#include<stdio.h>voidmain(void){//Port=5150;Winsockversionif((Ret=WSAStartup(MAKEWORD(2,2),{!=//NOTE:SinceWinsockfailedtoloadwecannotuse//todeterminetheerrorcodeasisnormallydonewhena//APIfails.Wehavetoreportthereturnstatusoftheprintf("WSAStartupfailedwitherror%d\n",Ret);}Createanewsockettolisteningforclientconnections.((ListeningSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))=={printf("socketfailedwitherror%d\n",WSAGetLastError());}SetupaSOCKADDR_INstructurethatwilltellbindthatwewanttolistenforconnectionsonallinterfacesusingport5150.NoticehowweconvertthePortvariablefromhostbyteordertonetworkbyteorder.ServerAddr.sin_family=AF_INET;ServerAddr.sin_port=htons(Port);ServerAddr.sin_addr.s_addr=htonl(INADDR_ANY);//Associatetheaddressinformationwiththesocketusingif(bind(ListeningSocket,(SOCKADDR*)&ServerAddr,=={%d\n",printf("bindfailedwithif(bind(ListeningSocket,(SOCKADDR*)&ServerAddr,=={%d\n",printf("bindfailedwitherror}Weusedabacklogof5Listenforclientconnections.normalformanyapplications.{(listen(ListeningSocket,5)==printf("listenfailedwitherror%d\n",WSAGetLastError());}printf("WeareawaitingaconnectiononportClientAddrLen=sizeof(SOCKADDR);//Acceptanewconnectionwhenonearrives.if((NewConnection={%d.\n",(SOCKADDR==printf("acceptfailedwitherror%d\n",WSAGetLastError());}printf("Wesuccessfullygotaconnectionfrom%s:%d.\n",Atthispointyoucandotwothingswiththesesockets.AwaitformoreconnectionsbycallingacceptagainonListeningSocketandstartsendingorreceivingdataonNewConnection.ForsimplicityWewillstoplisteningformoreconnectionsby//ListeningSocket.Wewillstartsendingandreceivingdata//NewConnection.//StartsendingandreceivingdataonNewConnection.For//wewilljustreceivesomedataandreporthowmanybytes//printf("Wearewaitingtoreceiveif((Ret=recv(NewConnection,DataBuffer,sizeof(DataBuffer),=={printf("recvfailedwitherror//wewilljustreceivesomedataandreporthowmanybytes//printf("Wearewaitingtoreceiveif((Ret=recv(NewConnection,DataBuffer,sizeof(DataBuffer),=={printf("recvfailedwitherror%d\n",WSAGetLastError());}printf("Wesuccessfullyreceived%dbyte(s).\n",Ret);printf("data:%s\n",DataBuffer);//Forthisapplicationwedonotplantodoanythingelse//connectionsowewilljustclosetheconnection.printf("Wearenowgoingtoclosetheclientconnection.\n");//Whenyourapplicationis//callWSACleanup.}#include<stdio.h>#pragmavoid{charPort=5150;(argc{IPprintf("USAGE:tcpclient<Server}//InitializeWinsockversionif((Ret=WSAStartup(MAKEWORD(2,2),&wsaData))!={//NOTE:SinceWinsockfailedtoloadwecannotuse//todeterminetheerror//todeterminetheerrorcodeasisnormallydonewhena//APIfails.Wehavetoreportthereturnstatusoftheprintf("WSAStartupfailedwitherror%d\n",Ret);}Createanew((s=socket(AF_INET,SOCK_DGRAM,=={printf("socketfailedwitherror%d\n",}SetupaSOCKADDR_INstructurethatwillbeusedtoconnecttoalisteningserveronport5150.Fordemonstrationpurposes,werequiredtheusertosupplyanIPaddressonthecommandlineandwefilledthisfieldinwiththedatafromtheuser.ServerAddr.sin_family=AF_INET;ServerAddr.sin_port=htons(Port);ServerAddr.sin_addr.s_addr=inet_addr(argv[1]);//Atthispointyoucanstartsendingorreceivingdata//thesockets.Wewilljustsendahellomessagetotheserverintlen;len=printf("Wewillnowtrytosendahelloif((Ret=sendto(s,"hello",6,0,(SOCKADDR*)&ServerAddr,len))==SOCKET_ERROR){printf("sendfailedwitherror%d\n",WSAGetLastError());}printf("Wesuccessfullysent%dbyte(s).\n",//Whenyouarefinishedsendingandreceivingdataonsocket//youshouldclosetheprintf("Weareclosingtheconnection.\n");//Whenyourapplicationisfinishedhandlingtheconnection,//}#include<stdio.h>voidmain(void){}#include<stdio.h>voidmain(void){//Port=5150;Winsockversionif((Ret=WSAStartup(MAKEWORD(2,2),{!=//NOTE:SinceWinsockfailedtoloadwecannotuse//todeterminetheerrorcodeasisnormallydonewhena//APIfails.Wehavetoreportthereturnstatusoftheprintf("WSAStartupfailedwitherror%d\n",Ret);}Createanew((s=socket(AF_INET,SOCK_DGRAM,=={printf("socketfailedwitherror%d\n",WSAGetLastError());}SetupaSOCKADDR_INstructurethatwilltellbindthatwewanttolistenforconnectionsonallinterfacesusingport5150.NoticehowweconvertthePortvariablefromhostbyteordertonetworkbyteorder.ServerAddr.sin_family=AF_INET;ServerAddr.sin_port=htons(Port);ServerAddr.sin_addr.s_a