华科 计算机网络 实验报告1Word文档下载推荐.docx
《华科 计算机网络 实验报告1Word文档下载推荐.docx》由会员分享，可在线阅读，更多相关《华科 计算机网络 实验报告1Word文档下载推荐.docx（18页珍藏版）》请在冰豆网上搜索。
3.实验内容与结果
2.修改simplex-talk程序，编制duplex-talk程序，支持client和server的双向通信
（1）程序整体功能
Client端程序连接Server端程序，Client能给Server发送信息，同时Server也能给Client发送信息，实现双向通信；
（2）程序组成及各模块/函数功能
Client端
Y
N
Server
（3）程序清单（见附件）
（4）程序的运行和测试结果
编译源文件，生成可执行文件并运行，其过程如下：
Socket端
server.exe
[simplex-talkserver]serverisreadyinlistening...
client.exelocalhost
[simplex-talkserver]receivedaconnectionfrom127.0.0.1:
[simplex-talkclient]connectiontolocalhostisready
[simplex-talkclient]pleaseinputyourmessage（emptyinputtohalt）:
Hello,Server.
[simplex-talkclient]send14charstoserver
[simplex-talkserver]received14chars
Hello,Client.
[simplex-talkserver]send14charstoclient
[simplex-talkclient]received14chars
Bye.
[simplex-talkclient]send5charstoserver
[simplex-talkserver]received5chars
[simplex-talkserver]emptymessageissendtoclient
[simplex-talkserver]connectionfrom127.0.0.1isterminated
[simplex-talkclient]emptymessageisreceived
[simplex-talkclient]connectionisterminated
运行结果截图
Client
4.实验中的问题
暂无
附件
1.
程序源代码
（1）socket-client.c
[键入文档的引述或关注点的摘要。
您可将文本框放置在文档中的任何位置。
请使用“绘图工具”选项卡更改引言文本框的格式。
]
/*wliucomments:
requiredforwindowssocketprogramming*/
#include<
winsock.h>
#pragmacomment（lib,"
wsock32.lib"
）
stdio.h>
string.h>
#defineSERVER_PORT5432
#defineMAX_BUFSIZE256
intmain（intargc,char*argv[]）
{
/*wliucomments:
WSADATAWSAData;
intWSAreturn;
uselesspointer*/
//FILE*fp;
structhostent*hp;
structsockaddr_insin;
char*host;
charbufIn[MAX_BUFSIZE],bufOut[MAX_BUFSIZE];
ints,new_s;
intlen;
intableToSendMsg=1;
//LimWugcomments:
Thisvariableactsasaflagtosendandreceivemessage
host="
localhost"
;
//if（argc==2）{
//host=argv[1];
//}
//else{
//fprintf（stderr,"
usage:
simplex-talkhost\n"
）;
//exit
（1）;
modifiedforwindowssocketprogramming*/
WSAreturn=WSAStartup（0x101,&
WSAData）;
if（WSAreturn）
{
fprintf（stderr,"
simplex-talk:
WSAerror.\n"
exit
（1）;
}
/*translatehostnameintopeer'
sIPaddress*/
hp=gethostbyname（host）;
if（!
hp）{
unknownhost:
%s\n"
host）;
modifiedforstringmemoryoperationinwindows*/
//bzero（（char*）&
sin,sizeof（sin））;
//bcopy（hp->
h_addr,（char*）&
sin.sin_addr,hp->
h_length）;
/*buildaddressdatastructure*/
memset（（char*）&
sin,0,sizeof（sin））;
memcpy（（char*）&
h_addr,hp->
sin.sin_family=AF_INET;
sin.sin_port=htons（SERVER_PORT）;
/*activeopen*/
if（（s=socket（PF_INET,SOCK_STREAM,0））<
0）{
perror（"
socketfailed."
if（connect（s,（structsockaddr*）&
sin,sizeof（sin））<
connectfailed."
/*wliucomments:
//close（s）;
closesocket（s）;
}
displayingcurrentstatus*/
printf（"
[simplex-talkclient]connectionto%sisready\n"
\n"
modificationtosupportconnectiontermination*/
//while（fgets（buf,sizeof（buf）,stdin））{
/*mainloop:
getandsendlinesoftext*/
while
（1）{
if（ableToSendMsg）{
//LimWugcomments:
SendMessgage
fgets（bufIn,sizeof（bufIn）,stdin）;
/*wliucomments:
modifiedtostopsending*/
if（strlen（bufIn）==1）{
/*wliucomments:
userinputemptymessagewith'
\n'
*/
bufIn[0]='
\0'
send（s,bufIn,1,0）;
printf（"
[simplex-talkclient]emptymessageissendtoserver\n"
break;
}else{
bufIn[MAX_BUFSIZE-1]='
len=strlen（bufIn）+1;
send（s,bufIn,len,0）;
[simplex-talkclient]send%dcharstoserver\n\n"
strlen（bufIn））;
ableToSendMsg=0;
}
}
else{
ReceiveMessage
len=recv（s,bufOut,sizeof（bufOut）,0）;
///*wliucomments:
if（strlen（bufOut）==0）{
receivedemptymessage*/
[simplex-talkclient]emptymessageisreceived\n"
[simplex-talkclient]received%dchars\n"
strlen（bufOut））;
fputs（bufOut,stdout）;
ableToSendMsg=1;
}
[simplex-talkclient]connectionisterminated\n"
WSACleanup（）;
return1;
Socket-server.c
/*---------------------------------------------------*/
//filename:
socket-server.c
//fileuseage:
demostratethebasicTCP-basedblocked
//socketprogramminginwindowssystem
//fileorigin:
demoofsimplex-talk
//computernetworks,systemapproach,4th
//modifiedbyWeiLiu,06/12/2011
//modifiedbyLimWug,03/21/2012
requiredforlinuxsocketprogramming*/
//#include<
sys/types.h>
sys/socket.h>
netinet/in.h>
netdb.h>
#defineMAX_PENDING5
#defineMAX_CONNECTION3
intmain（）
intableToSendMsg=0;
connections*/
intconn;
sin.sin_addr.s_addr=INADDR_ANY;
/*setuppassiveopen*/
if（（bind（s,（structsockaddr*）&
sin,sizeof（sin）））<
bindfailed."
listen（s,MAX_PENDING）;
[simplex-talkserver]serverisreadyinlistening...\n"
/*waitforconnection,thenreceiveandprinttext*/
conn=0;
while（conn<
MAX_CONNECTION）{
correctionforvariablelen*/
len=sizeof（structsockaddr_in）;
if（（new_s=accept（s,（structsockaddr*）&
sin,&
len））<
0）{
perror（"
acceptfailed."
exit
（1）;
[simplex-talkserver]receivedaconnectionfrom%s:
\n"
inet_ntoa（sin.sin_addr））;
//while（len=recv（new_s,buf,sizeof（buf）,0））{
while
（1）{
if（ableToSendMsg）{
//LimWugcomments:
fgets（bufIn,sizeof（bufIn）,stdin）;
if（strlen（bufIn）==1）{
/*wliucomments:
bufIn[0]='
send（new_s,bufIn,1,0）;
printf（"
[simplex-talkserver]emptymessageissendtoclient\n"
break;
}else{
bufIn[MAX_BUFSIZE-1]='
len=strlen（bufIn）+1;
send（new_s,bufIn,len,0）;
[simplex-talkserver]send%dcharstoclient\n\n"
ableToSendMsg=0;
}
else{
len=recv（new_s,bufOut,sizeof（bufOut）,0）;
if（strlen（bufOut）==0）{
[simplex-talkserver]emptymessageisreceived\n"
[simplex-talkserver]received%dchars\n"
fputs（bufOut,stdout）;
ableToSendMsg=1;
}
printf（"
[simplex-talkserver]connectionfrom%sisterminated\n"
//close（new_s）;
closesocket（new_s）;
conn++;
[simplex-talkserver]max_connectionsachieved,serverhalt\n"
升级会员 