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

Question

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！！

Answer 1

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！

Answer 2

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

Answer 3

#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;
}
}}

Answer 4

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

Answer 5

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

Answer 6

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

Answer 7

striking(硬撑者) 改了还是没用！

Answer 8

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;

Answer 9

参数 WSA_FLAG_OVERLAPPED 不要再改回去!!

Answer 10

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

Answer 11

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!!!

Answer 12

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！！！