TCP阻塞套接字客户端和服务器

Server部分

#include <Windows.h>
#include <iostream>
#include <string>
using namespace std;

#include <Winsock.h>
#pragma comment(lib,"WS2_32.lib")

bool main()
{
DWORD dwVerHigh=2,dwVerLow=2;
WSADATA wsaData;
if(WSAStartup(MAKEWORD(dwVerLow,dwVerHigh),&wsaData))
{
    MessageBox(NULL,"Failed to Load The Lib","Failure",MB_OK);
    return false;
}

SOCKET sListen=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if(INVALID_SOCKET==sListen)
{
    MessageBox(NULL,"Failed To Create Socket sListen","Failure",MB_OK);
    return false;
}

sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(4567);
sin.sin_addr.S_un.S_addr=INADDR_ANY;

if(SOCKET_ERROR==bind(sListen,(LPSOCKADDR)&sin,sizeof(sin)))
{
    MessageBox(NULL,"Failed to Bind!","Failure",MB_OK);
    return false;
}

if(SOCKET_ERROR==listen(sListen,5))
{
    MessageBox(NULL,"Failed to Listen","Failure",MB_OK);
    return false;
}

sockaddr_in remoteAddr;
int nAddrLen=sizeof(remoteAddr);
SOCKET sClient;

char *pszBuffer="Hello!";

while(true)
{
    sClient=accept(sListen,(SOCKADDR*)&remoteAddr,&nAddrLen);

    if(INVALID_SOCKET==sClient)
    {
     cout<<"Failed to Accept!"<<endl;
     continue ;
    }

    cout<<"Get a remoteAddr!"<<endl;
    send(sClient,pszBuffer,strlen(pszBuffer)+1,0);

    closesocket(sClient);
}

closesocket(sListen);

return true;
}

******************************************************************************

Client部分

#include <Windows.h>
#include <iostream>
#include <string>
using namespace std;

#include <Winsock.h>
#pragma comment(lib,"WS2_32.lib")

bool main()
{
DWORD dwVerHigh=2,dwVerLow=2;
WSADATA wsaData;
if(WSAStartup(MAKEWORD(dwVerLow,dwVerHigh),&wsaData))
{
    MessageBox(NULL,"Failed to Load The Lib","Failure",MB_OK);
    return false;
}

SOCKET s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if(INVALID_SOCKET==s)
{
    MessageBox(NULL,"Failed to Create Socket!","Failure",MB_OK);
    return false;
}

sockaddr_in servAddr;
servAddr.sin_family=AF_INET;
servAddr.sin_port=htons(4567);
servAddr.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");

if(-1==connect(s,(sockaddr*)&servAddr,sizeof(servAddr)))
{
    MessageBox(NULL,"Failed to Connect","Failure",MB_OK);
    return false;
}

while(true)
{
    char szBuffer[256];
    int nRecv=recv(s,szBuffer,256,0);

    if(nRecv>0)
    {
     cout<<szBuffer<<endl;
    }
}

closesocket(s);

return true;
}