在线等：WSARecv投递失败,WSAGetLastError返回10045，重叠IO

[robin_yao]

解决就给分！
顺便问下WSAGetLastError怎么查错误编号（10045）所对应的解释啊！
我在MSDN中查不到，菜的不好意思了！！

[robin_yao]

我自己找到答案了
：参考的对象类型不支持尝试的操作。 请高手解释一下什么意思？
如何解决？

[robin_yao]

#define DATA_BUFSIZE 4096
#include <WINSOCK2.H>
#include <ostream.h>
#pragma comment(lib,"ws2_32")
void main(void)
{
DWORD recvbytes;
DWORD flags;
WSABUF databuf;
char buffer[DATA_BUFSIZE];
WSAEVENT eventarray[WSA_MAXIMUM_WAIT_EVENTS];
WSAOVERLAPPED acceptoverlapped;
SOCKET listensock,acceptsock;
DWORD EventTotal=0;
WSAData wsadata;
SOCKADDR_IN SerAddr;
WSAStartup(MAKEWORD(2,2),&wsadata);

listensock = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

SerAddr.sin_family = AF_INET;
SerAddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
SerAddr.sin_port = htons(7780);

bind(listensock,(SOCKADDR *)&SerAddr,sizeof(SerAddr));
listen(listensock,5);




acceptsock = accept(listensock,NULL,NULL);
if (WSAGetLastError() == 0)
{
eventarray[EventTotal] = WSACreateEvent();
ZeroMemory(&acceptoverlapped,sizeof(WSAOVERLAPPED));
acceptoverlapped.hEvent = eventarray[EventTotal];
databuf.len = DATA_BUFSIZE;
databuf.buf = buffer;
EventTotal++;
int ii;
ii = WSARecv(acceptsock,&databuf,1,&recvbytes,&flags,&acceptoverlapped,NULL);
if ( ii == SOCKET_ERROR)
{
ii = WSAGetLastError();
if ( ii != WSA_IO_PENDING)
{
cout<<"WSARecv Error!"<<endl;
closesocket(acceptsock);
WSACloseEvent(eventarray[EventTotal]);
return;

}
}


}



while (1)
{
DWORD dwIndex;
DWORD BytesTransferred;
DWORD Flags;
dwIndex = WSAWaitForMultipleEvents(EventTotal,eventarray,FALSE,WSA_INFINITE,FALSE);


WSAResetEvent(eventarray[dwIndex - WSA_WAIT_EVENT_0]);

WSAGetOverlappedResult(acceptsock,&acceptoverlapped,&BytesTransferred, FALSE,&Flags);
if (BytesTransferred == 0)
{
closesocket(acceptsock);
WSACloseEvent(eventarray[dwIndex - WSA_WAIT_EVENT_0]);
return;
}


}

}

[robin_yao]

每次跟踪到WSARecv 下面的WSAGetLastError的返回值就发现返回10045错误
郁闷啊

[striking]

listensock = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
->

listensock = WSASocket(AF_INET, SOCK_STREAM, 0, NULL, 0,
WSA_FLAG_OVERLAPPED);

参数应该指定WSA_FLAG_OVERLAPPED 表示 为重叠

[sdf123321]

striking(硬撑者) 高手呀

解决一下我的问题吧，谢谢
http://community.csdn.net/Expert/topic/4663/4663080.xml?temp=.1440088

[robin_yao]

striking(硬撑者) 改了还是没用！

[striking]

不晓得第一次accept是否就错了.
1.
WSAOVERLAPPED acceptoverlapped;

->

WSAOVERLAPPED acceptoverlapped[WSA_MAXIMUM_WAIT_EVENTS]; //每个client对应一个overlapp.
////////////////////////////////////////
2.
databuf.len = DATA_BUFSIZE;
databuf.buf = buffer;

buffer 道理同overlap.

3.
设flags=0;


4. 最好将信息统一放在一个结构体内.如
typedef struct _SOCKET_INFORMATION {
CHAR Buffer[DATA_BUFSIZE];
WSABUF DataBuf;
SOCKET Socket;
WSAOVERLAPPED Overlapped;
DWORD BytesSEND;
DWORD BytesRECV;
} SOCKET_INFORMATION, * LPSOCKET_INFORMATION;

[striking]

参数 WSA_FLAG_OVERLAPPED 不要再改回去!!

[robin_yao]

1.第一次accept的时候没错
2.WSAOVERLAPPED acceptoverlapped[WSA_MAXIMUM_WAIT_EVENTS]; //每个client对应一个overlapp. 这个我知道。
3.设flags=0？在哪里设？
4.这个以后再考虑，先把这个问题搞定

[striking]

既然第一次没有错, 那你知道怎么改了吗?

你的程序只有一个 acceptoverlapped!!!

[robin_yao]

情况终于有了改观
我设flag=0后，返回错误为10014了
慢慢来，快了！！！

[robin_yao]

up

[robin_yao]

WSAEOPNOTSUPP (10045)
• Translation: Operation not supported.
• Description: The operation that was tried is not supported for the type of object that is referenced. This error typically occurs when a socket descriptor to a socket that cannot support this operation is trying to accept a connection on a datagram socket.

MS网站找的说明！

[striking]

信息太少了.

1. Overlapped的event是否create
2. 是否提供有效的buffer (WSABUF 的指向buffer )


如果以上的回答都是ok, 贴出代码