IOCP中用WSARecv接收不了客户端发来的数据

砍柴君 2013-03-25 06:29:46

我在服务端用WSARecv函数接受客户端发来的数据，当我在客户端中发数据后,在服务端中却看不到数据，这时的GetQueuedCompletionStatus函数中lpNumberOfBytes值为0；我的WSARecv函数是这样的
SOCKET socket=m_client[IDclient];
DWORD RecvBytes=0;
DWORD Flags=0;
MYOVERLAPPED *lpMyoverlapped=GetEmptyMyOverlapped(IDclient);
lpMyoverlapped->id=IDclient;
lpMyoverlapped->IoMode=recvMode;
WSARecv(socket,&lpMyoverlapped->wsaBuf,1,&RecvBytes,&Flags,lpMyoverlapped,NULL);
我的GetQueuedCompletionStatus函数代码为：
DWORD BytesTransferred=0;
MYOVERLAPPED *lpoverlapped=NULL;
SOCKET socket=NULL;
while (1)
{
if ( GetQueuedCompletionStatus(lpsocket->m_iocp, &BytesTransferred, (LPDWORD)&socket, (LPOVERLAPPED*)&lpoverlapped, INFINITE) == 0 )
求大神帮忙谢谢了

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砍柴君 2013-03-25

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引用 9 楼 zilaishuichina 的回复:

当了还是什么出错了当了是当在什么地方啊出错那还是那句老话lasterror

不过没事了只要像你说的那样在GetEmptyMyOverlapped内申请内存就可以了，下次注意下就好，真是太感谢你了，实在太感谢了。结贴走起

砍柴君 2013-03-25

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引用 9 楼 zilaishuichina 的回复:

当了还是什么出错了当了是当在什么地方啊出错那还是那句老话lasterror

一开始运行进入main函数就开始出错，不知道当在哪里，这个错误好隐秘；

zilaishuichina 2013-03-25

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当了还是什么出错了当了是当在什么地方啊出错那还是那句老话lasterror

砍柴君 2013-03-25

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引用 7 楼 zilaishuichina 的回复:

GetEmptyMyOverlapped里面有对wsabuff.buf申请内存么？

被你一提醒下才发现没申请内存就去修改了下MYOVERLAPPED的结构体 typedef struct MYOVERLAPPED:public OVERLAPPED{ WSABUF WsaBuf; u_short id; UINT IoMode; char buff[MAX_SENDSIZE] MYOVERLAPPED() { Internal=0; InternalHigh=0; Offset=0; OffsetHigh=0; hEvent=0; IoMode=0; id=(WORD)-1; WsaBuf.buf=buff; WsaBuf.len=MAX_SENDSIZE; } }MYOVERLAPPED,LPMYOVERLAPPED; 在这结构体中定义了一个char数组buff，并将该数组地址给了WsaBuf.buf，运行了下程序发现程序直接出错了请问这样是什么原因

zilaishuichina 2013-03-25

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GetEmptyMyOverlapped里面有对wsabuff.buf申请内存么？

砍柴君 2013-03-25

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引用 3 楼 zilaishuichina 的回复:

WSARecv返回值是多少啊有没有错误码啊 WSAGetLastError看看啊

返回的是WSA_IO_PENDING 没有问题我的部分代码已经贴出来了因为代码太多所以就贴了这有联系的部分求帮忙看下为嘛会接收不到客户端发来的数据

砍柴君 2013-03-25

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终于有人了好高兴啊 WSARecv返回的是WSA_IO_PENDING值没有问题

砍柴君 2013-03-25

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贴出下自己的代码： typedef struct MYOVERLAPPED:public OVERLAPPED{ WSABUF wsaBuf; u_short id; UINT IoMode; MYOVERLAPPED() { Internal=0; InternalHigh=0; Offset=0; OffsetHigh=0; hEvent=0; IoMode=0; id=(WORD)-1; wsaBuf.buf=NULL; wsaBuf.len=0; } }MYOVERLAPPED,LPMYOVERLAPPED; 下面这两个数组是CSOCKET的成员变量，CSOCKET是我自己定义的一个类 SOCKET m_client[MAX_USER]; MYOVERLAPPED m_myOverlapped[MAX_USER]; 下面的PostRecv函数是用来调用WSARecv来接收客户端的请求 BOOL CSOCKET::PostRecv(u_short IDclient, UINT recvMode) { SOCKET socket=m_client[IDclient]; DWORD RecvBytes=0; DWORD Flags=0; MYOVERLAPPED *lpMyoverlapped=GetEmptyMyOverlapped(IDclient); lpMyoverlapped->id=IDclient; lpMyoverlapped->IoMode=recvMode; if(WSARecv(socket,&lpMyoverlapped->wsaBuf,1,&RecvBytes,&Flags,lpMyoverlapped,NULL)==SOCKET_ERROR) { int Error=WSAGetLastError(); if (Error != WSA_IO_PENDING) { cout<<"WSARecv is fail:"<<WSAGetLastError()<<endl; deleteclient(IDclient); return FALSE; } } return TRUE; } 下面的threadiocp是线程的回调函数 DWORD WINAPI CSOCKET::threadiocp(LPVOID lparam) { CSOCKET *lpsocket=(CSOCKET *)lparam; DWORD BytesTransferred=0; MYOVERLAPPED *lpoverlapped=NULL; SOCKET socket=NULL; while (1) { if ( GetQueuedCompletionStatus(lpsocket->m_iocp, &BytesTransferred, (LPDWORD)&socket, (LPOVERLAPPED*)&lpoverlapped, INFINITE) == 0 ) { DWORD dwLastError = GetLastError(); if ( dwLastError != 64 ) { cout<<"GetQueuedCompletionStatus fail:"<<GetLastError()<<endl; } } if (BytesTransferred==0) { cout<<"客户：%d 退出!"<<lpoverlapped->id<<endl; lpsocket->deleteclient(lpoverlapped->id); continue; } 当我在客户端发送数据给服务端时，服务器调用threadiocp接收数据，但是这个时候BytesTransferred的值却为0，lpoverlapped->wsabuff.buf中没有数据，但是明明我在客户端那边有发数据了啊，为什么就接收不到呢求帮忙在这里谢谢谢谢了

zilaishuichina 2013-03-25