Question

这个c/s连天程序 为什么只能在本机上通信，而在两台之间就连不了了？

服务器端：
#include <windows.h>
#include <stdio.h>
DWORD WINAPI FunProc(LPVOID lpParameter);
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 1, 1 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return;
}
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {
WSACleanup( );
return;
}
SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
addrSrv.sin_family=AF_INET;
addrSrv.sin_port=htons(6000);
bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
listen(sockSrv,5);
SOCKADDR_IN addrClient;
int len=sizeof(SOCKADDR);
while(1)
{
SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);
char sendbuf[100];
sprintf(sendbuf,"Welcome %s to c/s chating room.",inet_ntoa(addrClient.sin_addr));
send(sockConn,sendbuf,strlen(sendbuf)+1,0);
recv(sockConn,sendbuf,100,0);
printf("%s\n",sendbuf);
int i=1;
while(i)
{
char sendbuf[100];
char recvbuf[100];
recv(sockConn,recvbuf,100,0);
if('q'==recvbuf[0])
{
send(sockSrv,"q",strlen("q")+1,0);
printf("Chat end!");
i=0;
}
printf("Client says:\n");
printf("%s\n",recvbuf);
printf("you say:");
gets(sendbuf);
send(sockConn,sendbuf,strlen(sendbuf)+1,0);
}
closesocket(sockConn);
}
}
客户端：
#include <windows.h>
#include <stdio.h>
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 1, 1 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {return;}
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {WSACleanup( );return; }
SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr=inet_addr("172.17.216.113");//我的ip(校园网的，在我电脑运行服务器端。)
addrSrv.sin_family=AF_INET;
addrSrv.sin_port=htons(6000);
connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
char recvbuf[100];
recv(sockClient,recvbuf,100,0);
printf("%s\n",recvbuf);
send(sockClient,"连接成功！",strlen("连接成功！")+1,0);
int i=1;
while(i)
{
char sendbuf[100];
printf("you say:");
gets(sendbuf);
send(sockClient,sendbuf,strlen(sendbuf)+1,0);
char recvbuf[100];
recv(sockClient,recvbuf,100,0);
if('q'==recvbuf[0])
{
send(sockClient,"q",strlen("q")+1,0);
printf("Chat end!");
i=0;
}
printf("Server says:\n");
printf("%s\n",recvbuf);
}
closesocket(sockClient);
WSACleanup();
}
在本机上一切正常，就是可以发送接收字符（一发一接），而当客户端与服务器端分别在不同的机子上运行时，就不能连接了。这是什么情况？
请高手指点！！

Answer 1

是不是防火墙的原因？端口6000被防火墙屏蔽了？