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poll.cpp
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poll.cpp
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/******************************************************************************\
* poll.cpp
*
* This IPv6 sample demonstrates the use of WSAPoll to test writability and
* readability of the socket.
*
* WSAPoll is new to Windows Sockets in Windows Vista.
*
*
* This sample requires that TCP/IP version 6 be installed on the system (default
* configuration for Windows Vista).
*
* The client connects a socket to the server, then sends/recvs when WSAPoll
* indicates such is possible to do without blocking. Likewise for the server (listener).
*
*
* This is a part of the Microsoft Source Code Samples.
* Copyright 1996 - 2006 Microsoft Corporation.
* All rights reserved.
* This source code is only intended as a supplement to
* Microsoft Development Tools and/or WinHelp documentation.
* See these sources for detailed information regarding the
* Microsoft samples programs.
\******************************************************************************/
#ifdef _IA64_
#pragma warning (disable: 4311)
#pragma warning (disable: 4312)
#endif
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <winsock2.h>
#include <ws2tcpip.h>
#include <mstcpip.h>
#include <stdio.h>
#define ERR(e) \
printf("%s:%s failed: %d [%s@%ld]\n",__FUNCTION__,e,WSAGetLastError(),__FILE__,__LINE__)
#define CLOSESOCK(s) \
if(INVALID_SOCKET != s) {closesocket(s); s = INVALID_SOCKET;}
#define DEFAULT_WAIT 30000
#define WS_VER 0x0202
#define DEFAULT_PORT 12345
#define TST_MSG "0123456789abcdefghijklmnopqrstuvwxyz\0"
HANDLE hCloseSignal = NULL;
DWORD WINAPI ConnectThread(LPVOID pParam)
{
WSAPOLLFD fdarray = {0};
SOCKET csock = INVALID_SOCKET;
SOCKADDR_STORAGE addrLoopback = {0};
INT ret = 0;
ULONG uNonBlockingMode = 1;
CHAR buf[MAX_PATH] = {0};
UNREFERENCED_PARAMETER(pParam);
__try
{
if (INVALID_SOCKET == (csock = socket(AF_INET6,
SOCK_STREAM,
0
)))
{
ERR("socket");
__leave;
}
if (SOCKET_ERROR == ioctlsocket(csock,
FIONBIO,
&uNonBlockingMode
))
{
ERR("FIONBIO");
__leave;
}
addrLoopback.ss_family = AF_INET6;
INETADDR_SETLOOPBACK((SOCKADDR*)&addrLoopback);
SS_PORT((SOCKADDR*)&addrLoopback) = htons(DEFAULT_PORT);
if (SOCKET_ERROR == connect(csock,
(SOCKADDR*)&addrLoopback,
sizeof (addrLoopback)
))
{
if (WSAEWOULDBLOCK != WSAGetLastError())
{
ERR("connect");
__leave;
}
}
//Call WSAPoll for writeability on connecting socket
fdarray.fd = csock;
fdarray.events = POLLWRNORM;
if (SOCKET_ERROR == (ret = WSAPoll(&fdarray,
1,
DEFAULT_WAIT
)))
{
ERR("WSAPoll");
__leave;
}
if (ret)
{
if (fdarray.revents & POLLWRNORM)
{
printf("ConnectThread: Established connection\n");
//Send data
if (SOCKET_ERROR == (ret = send(csock,
TST_MSG,
sizeof (TST_MSG),
0
)))
{
ERR("send");
__leave;
}
else
printf("ConnectThread: sent %d bytes\n",ret);
}
}
//Call WSAPoll for readability on connected socket
fdarray.events = POLLRDNORM;
if (SOCKET_ERROR == (ret = WSAPoll(&fdarray,
1,
DEFAULT_WAIT
)))
{
ERR("WSAPoll");
__leave;
}
if (ret)
{
if (fdarray.revents & POLLRDNORM)
{
if (SOCKET_ERROR == (ret = recv(csock,
buf,
sizeof (buf),
0
)))
{
ERR("recv");
__leave;
}
else
printf("ConnectThread: recvd %d bytes\n",ret);
}
}
WaitForSingleObject(hCloseSignal,DEFAULT_WAIT);
}
__finally
{
CLOSESOCK(csock);
}
return 0;
}
int __cdecl main()
{
WSADATA wsd;
INT nStartup = 0,
nErr = 0,
ret = 0;
SOCKET lsock = INVALID_SOCKET,
asock = INVALID_SOCKET;
SOCKADDR_STORAGE addr = {0};
WSAPOLLFD fdarray = {0};
ULONG uNonBlockingMode = 1;
CHAR buf[MAX_PATH] = {0};
HANDLE hThread = NULL;
DWORD dwThreadId = 0;
__try
{
nErr = WSAStartup(WS_VER,&wsd);
if (nErr)
{
WSASetLastError(nErr);
ERR("WSAStartup");
__leave;
} else
nStartup++;
if (NULL == (hCloseSignal = CreateEvent(NULL,
TRUE,
FALSE,
NULL
)))
{
ERR("CreateEvent");
__leave;
}
if (NULL == (hThread = CreateThread(NULL,
0,
ConnectThread,
NULL,
0,
&dwThreadId
)))
{
ERR("CreateThread");
__leave;
}
addr.ss_family = AF_INET6;
INETADDR_SETANY((SOCKADDR*)&addr);
SS_PORT((SOCKADDR*)&addr) = htons(DEFAULT_PORT);
if (INVALID_SOCKET == (lsock = socket(AF_INET6,
SOCK_STREAM,
0
)))
{
ERR("socket");
__leave;
}
if (SOCKET_ERROR == ioctlsocket(lsock,
FIONBIO,
&uNonBlockingMode
))
{
ERR("FIONBIO");
__leave;
}
if (SOCKET_ERROR == bind(lsock,
(SOCKADDR*)&addr,
sizeof (addr)
))
{
ERR("bind");
__leave;
}
if (SOCKET_ERROR == listen(lsock,1))
{
ERR("listen");
__leave;
}
//Call WSAPoll for readability of listener (accepted)
fdarray.fd = lsock;
fdarray.events = POLLRDNORM;
if (SOCKET_ERROR == (ret = WSAPoll(&fdarray,
1,
DEFAULT_WAIT
)))
{
ERR("WSAPoll");
__leave;
}
if (ret)
{
if (fdarray.revents & POLLRDNORM)
{
printf("Main: Connection established.\n");
if (INVALID_SOCKET == (asock = accept(lsock,
NULL,
NULL
)))
{
ERR("accept");
__leave;
}
if (SOCKET_ERROR == (ret = recv(asock,
buf,
sizeof(buf),
0
)))
{
ERR("recv");
__leave;
} else
printf("Main: recvd %d bytes\n",ret);
}
}
//Call WSAPoll for writeability of accepted
fdarray.fd = asock;
fdarray.events = POLLWRNORM;
if (SOCKET_ERROR == (ret = WSAPoll(&fdarray,
1,
DEFAULT_WAIT
)))
{
ERR("WSAPoll");
__leave;
}
if (ret)
{
if (fdarray.revents & POLLWRNORM)
{
if (SOCKET_ERROR == (ret = send(asock,
TST_MSG,
sizeof(TST_MSG),
0
)))
{
ERR("send");
__leave;
} else
printf("Main: sent %d bytes\n",ret);
}
}
SetEvent(hCloseSignal);
WaitForSingleObject(hThread,DEFAULT_WAIT);
}
__finally
{
CloseHandle(hCloseSignal);
CloseHandle(hThread);
CLOSESOCK(asock);
CLOSESOCK(lsock);
if(nStartup)
WSACleanup();
}
return 0;
}