我正在编写一个简单的测试 ICOP 客户端和服务器，以确保我正确使用 API 并且服务器正确接收客户端发送的数据。我已经包含了这个问题的所有代码。
这就是我遇到一些问题的地方，接收缓冲区内的数据有时似乎已损坏（损坏是因为有时缓冲区内的数据块可能乱序或丢失）。需要明确的是，这是各个接收缓冲区内的数据，我并不是指由于线程调度问题而导致多个缓冲区之间的顺序混乱。我之前发布过一个与此相关的问题here https://stackoverflow.com/questions/27742668/tcp-ip-server-using-iocp-occasional-data-corruption-in-receive-buffers。不过，我在获取正确的代码示例方面做了更多工作，因此我发布了一个新问题并将链接到此问题。我希望其他人能够运行这段代码并体验到同样奇怪的行为。
测试代码
测试应用程序可以在两种模式下运行：客户端和服务器。运行服务器并开始侦听，运行客户端并连接到服务器，一旦连接就会开始以允许的速度向服务器抛出数据。然后，服务器验证调用 WSARecv 后从 GetQueuedCompletionStatus 返回的每个缓冲区内的数据。每次 WSASend 完成时，我都会将结构的 OVERLAPPED 部分清零，并使用原始数据缓冲区再次调用 WSASend。
客户端发送的每个数据缓冲区都是一系列字节，这些字节依次递增直至达到指定的最大值。我不会发送完整范围的 0..255，以防大小完全适合数据包的倍数，并以某种方式隐藏问题，因此在我的示例代码字节范围为 0..250。对于构建的每个发送缓冲区，我重复该模式 numberOfGroups 次。
这种格式应该意味着我可以有多个 WSARecv 未完成，然后完全独立于任何其他缓冲区来验证返回缓冲区中的数据，这意味着不需要同步或重建顺序。也就是说，我可以从第一个字节开始，验证它们是否依次递增到最大值，然后重置为 0。一旦我的测试没有问题，我就可以进行更复杂的操作，对接收到的缓冲区进行排序并验证更复杂的数据。
您可以在命令行上指定可以有多少个同时未完成的 WSASend 和 WSARecv 调用。这个问题似乎发生了far当有 2 个或更多未完成的 WSARecv 调用时，这种情况会更常见。使用 1 时，它可以运行相当长的时间，然后偶尔会检测到问题。
我一直在 Windows 7 上并使用 Visual Studio 2010 C++ 进行测试。
客户端和服务器中同时调用的数量似乎都有影响。对两者使用 2 似乎比某些组合更容易产生损坏数据。
套接字和 IOCP 似乎需要大量样板代码才能启动并运行一个非常基本的客户端和服务器应用程序。接收缓冲区的实际代码只有几行，涉及调用 WSARecv 并处理来自 GetQueuedCompletionStatus 的已完成调用。
此代码调用 WSARecv
void IOCPConnection::postRecv(PTestOverlapped overlapped)
{
DWORD numberOfBytesTransferred = 0;
DWORD flags = 0;
if (overlapped == nullptr)
{
overlapped = new TestOverlapped(receiveBufferSize);
overlapped->connection = this;
}
else
{
overlapped->reset();
}
overlapped->operation = soRecv;
auto returnCode = WSARecv(socket, &(overlapped->buffer), 1, &numberOfBytesTransferred, &flags, (LPWSAOVERLAPPED) overlapped, nullptr);
}
当 WSARecv 调用完成时，它们由工作线程处理 - 我删除了与从此代码段接收数据无关的行
void IOCPWorker::execute()
{
bool quit = false;
DWORD numberOfBytesTransferred = 0;
ULONG_PTR completionKey = NULL;
PTestOverlapped overlapped = nullptr;
while (!quit)
{
auto queueResult = GetQueuedCompletionStatus(manager->iocp, &numberOfBytesTransferred, &completionKey, (LPOVERLAPPED *)&overlapped, INFINITE);
if (queueResult)
{
switch (overlapped->operation)
{
case soRecv:
{
IOCPConnection *connection = overlapped->connection;
connection->onRecv(overlapped, numberOfBytesTransferred); // This method validates the received data
connection->postRecv(overlapped);
overlapped = nullptr;
break;
}
default:;
}
}
}
}
对connection->onRecv 的调用是我验证数据的地方。这里看起来有什么明显错误吗？
我已经提供了完整的代码供参考，如果您喜欢冒险，应该编译。
完整源码供参考
服务器示例侦听端口 3000，最多有 2 个未完成的 WSARecv 调用
> IOCPTest.exe server 3000 2
连接到端口 3000 上的 127.0.0.1 的客户端示例，最多有 2 个未完成的 WSASend 调用
> IOCPTest.exe client 127.0.0.1 3000 2
该计划由少量课程组成
IOCPConnectionManager
此类处理连接监听并启动工作线程。
IOCPConnection
只需跟踪 SOCKET 和一些处理异步调用的方法。当 WSARecv 返回并验证缓冲区内的数据时，将调用 IOCPConnection::onRecv。它只是打印一条消息，如果发现数据乱序则返回。
IOCPWorker
工作线程。 IOCPWorker::execute() 是调用 GetQueuedCompletionStatus 的地方。
TestOverlapped
所需的重叠结构。
您还需要为链接器包含 Ws2_32.lib 和 Mswsock.lib。
主.cpp文件
/************************************************************************
* *
* Test IOCP Client and Server - David Shaw *
* *
* There is limited error handling here and it assumes ideal conditions *
* Some allocated objects are not freed at the end, this is a test only *
* *
************************************************************************/
#include "stdafx.h"
#include <iostream>
#include <string>
#include "IOCPTest.h"
#include <Windows.h>
void printUse()
{
std::cout << "Invalid arguments" << std::endl;
std::cout << "This test app has very limited error handling or memory management" << std::endl;
std::cout << "Run as client or server (run the server first) e.g." << std::endl << std::endl;
std::cout << "To run as server listening on port 3000 with 2 pending receives:" << std::endl;
std::cout << "> IOCPTester.exe server 3000 2" << std::endl << std::endl;
std::cout << "To run as client connected to 127.0.0.1 on port 3000 with 2 pending sends:" << std::endl;
std::cout << "> IOCPTester.exe client 127.0.0.1 3000 2" << std::endl << std::endl;
std::cout << "Hit enter to exit" << std::endl;
std::cin.ignore();
}
int main(int argc, char *argv[])
{
if (argc < 4)
{
printUse();
return 0;
}
std::string mode(argv[1]);
if ((mode.compare("client") != 0) && (mode.compare("server") != 0))
{
printUse();
return 0;
}
IOCPTest::IOCPConnectionManager *manager = new IOCPTest::IOCPConnectionManager();
bool server = mode.compare("server") == 0;
if (server)
{
std::string listenPort(argv[2]);
std::string postedReceiveCount(argv[3]);
manager->listenPort = atoi(listenPort.c_str());
manager->postedReceiveCount = atoi(postedReceiveCount.c_str());
manager->postedSendCount = 1; // Not really used in this mode
manager->startListening();
}
else
{
if (argc < 5)
{
printUse();
return 0;
}
std::string host(argv[2]);
std::string port(argv[3]);
std::string postedSendCount(argv[4]);
manager->postedReceiveCount = 1; // Not really used in this mode
manager->postedSendCount = atoi(postedSendCount.c_str());
IOCPTest::IOCPConnection *connection = manager->createConnection();
connection->host = host;
connection->port = atoi(port.c_str());
connection->connect();
}
std::cout << "Hit enter to exit" << std::endl;
std::cin.ignore();
}
IOCP测试.h
/************************************************************************
* *
* Test IOCP Client and Server - David Shaw *
* *
* There is limited error handling here and it assumes ideal conditions *
* std::cout might not be the best approach in a multithreaded *
* environment but this is just a simple test app. *
* Some allocated objects are not cleaned up at the end either, but *
* again this is just a test. *
* *
************************************************************************/
#ifndef IOCPTestH
#define IOCPTestH
#endif
#include <WinSock2.h> // Include before as otherwise Windows.h includes and causes issues
#include <Windows.h>
#include <string>
namespace IOCPTest
{
class IOCPConnection;
enum IOCPSocketOperation
{
soUnknown,
soAccept,
soConnect,
soDisconnect,
soSend,
soRecv,
soQuit
};
struct TestOverlapped
{
OVERLAPPED overlapped;
WSABUF buffer;
IOCPSocketOperation operation;
IOCPConnection *connection;
bool resend; // Set this to keep sending the same data over and over
TestOverlapped(int bufferSize);
~TestOverlapped();
void reset();
};
typedef TestOverlapped *PTestOverlapped;
class IOCPConnectionManager
{
public:
static const int NUMACCEPTS = 5;
WSADATA wsaData;
HANDLE iocp;
SOCKET listenSocket;
USHORT listenPort;
int postedReceiveCount;
int postedSendCount;
void startListening();
void postAcceptEx();
IOCPConnection *createConnection();
IOCPConnectionManager();
};
class IOCPConnection
{
public:
SOCKET socket;
IOCPConnectionManager *manager;
std::string host;
USHORT port;
void onAcceptEx(PTestOverlapped overlapped, DWORD numberOfBytesTransferred);
void postRecv(PTestOverlapped overlapped = nullptr);
void onRecv(PTestOverlapped overlapped, DWORD numberOfBytesTransferred);
void onConnect(PTestOverlapped overlapped, DWORD numberOfBytesTransferred);
void send(PTestOverlapped overlapped);
void onSent(PTestOverlapped overlapped, DWORD numberOfBytesTransferred);
void connect();
};
class IOCPWorker
{
public:
HANDLE threadHandle;
DWORD threadId;
IOCPConnectionManager *manager;
IOCPWorker(bool suspended);
void start();
void execute();
};
}
IOCP测试.cpp
#include "stdafx.h"
#include "IOCPTest.h"
#include <iostream>
#include <Mswsock.h>
#include <WS2tcpip.h>
#include <sstream>
namespace IOCPTest
{
LPFN_ACCEPTEX fnAcceptEx = nullptr;
LPFN_CONNECTEX fnConnectEx = nullptr;
GUID GuidAcceptEx = WSAID_ACCEPTEX;
GUID GuidConnectEx = WSAID_CONNECTEX;
const byte maxByteExpected = 250;
const int numberOfGroups = 4096;
const int receiveBufferSize = 0x100000;
BOOL AcceptEx
(
SOCKET sListenSocket,
SOCKET sAcceptSocket,
PVOID lpOutputBuffer,
DWORD dwReceiveDataLength,
DWORD dwLocalAddressLength,
DWORD dwRemoteAddressLength,
LPDWORD lpdwBytesReceived,
LPOVERLAPPED lpOverlapped
)
{
if (fnAcceptEx == nullptr)
{
DWORD dwBytes;
int result = WSAIoctl(sListenSocket, SIO_GET_EXTENSION_FUNCTION_POINTER, &GuidAcceptEx, sizeof (GuidAcceptEx), &fnAcceptEx, sizeof(fnAcceptEx), &dwBytes, NULL, NULL);
if (result != 0)
{
std::cerr << "Error calling WSAIoctl for AcceptEx" << std::endl;
return false;
}
}
return fnAcceptEx(sListenSocket, sAcceptSocket, lpOutputBuffer, dwReceiveDataLength, dwLocalAddressLength, dwRemoteAddressLength, lpdwBytesReceived, lpOverlapped);
}
BOOL ConnectEx(
SOCKET s,
const struct sockaddr FAR *name,
int namelen,
PVOID lpSendBuffer,
DWORD dwSendDataLength,
LPDWORD lpdwBytesSent,
LPOVERLAPPED lpOverlapped
)
{
if (fnConnectEx == nullptr)
{
DWORD dwBytes;
int result = WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &GuidConnectEx, sizeof (GuidConnectEx), &fnConnectEx, sizeof(fnConnectEx), &dwBytes, NULL, NULL);
if (result != 0)
{
std::cerr << "Error calling WSAIoctl for ConnectEx" << std::endl;
return false;
}
}
return fnConnectEx(s, name, namelen, lpSendBuffer, dwSendDataLength, lpdwBytesSent, lpOverlapped);
}
// TestOverlapped
TestOverlapped::TestOverlapped(int bufferSize):
overlapped(),
operation(soUnknown),
connection(nullptr),
buffer(),
resend(false)
{
if (bufferSize > 0)
{
buffer.len = bufferSize;
buffer.buf = (CHAR*) malloc(bufferSize);
}
}
TestOverlapped::~TestOverlapped()
{
if (buffer.buf != nullptr)
{
free(buffer.buf);
}
}
void TestOverlapped::reset()
{
overlapped = OVERLAPPED();
}
// IOCPConnectionManager
IOCPConnectionManager::IOCPConnectionManager():
wsaData(),
listenSocket(0),
listenPort(0),
postedReceiveCount(1)
{
WSAStartup(WINSOCK_VERSION, &wsaData);
iocp = CreateIoCompletionPort(INVALID_HANDLE_VALUE, 0, 0, 0);
SYSTEM_INFO systemInfo = SYSTEM_INFO();
GetSystemInfo(&systemInfo);
for (decltype(systemInfo.dwNumberOfProcessors) i = 0; i < systemInfo.dwNumberOfProcessors; i++)
{
IOCPWorker* worker = new IOCPWorker(true);
worker->manager = this;
worker->start();
}
}
void IOCPConnectionManager::startListening()
{
listenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
CreateIoCompletionPort((HANDLE)listenSocket, iocp, ULONG_PTR(this), 0);
sockaddr_in localAddress = sockaddr_in();
localAddress.sin_family = AF_INET;
localAddress.sin_addr.s_addr = INADDR_ANY; // Listen on all addresses
localAddress.sin_port = htons(listenPort);
if (bind(listenSocket, (SOCKADDR*) &localAddress, sizeof(localAddress)) == SOCKET_ERROR)
{
std::cerr << "Error in binding listening socket" << std::endl;
}
if (listen(listenSocket, SOMAXCONN) == 0)
{
std::cout << "Listening on port " << listenPort << std::endl;
}
for (int i = 0; i < NUMACCEPTS; i++)
{
postAcceptEx();
}
}
void IOCPConnectionManager::postAcceptEx()
{
SOCKET acceptSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
IOCPConnection *connection = new IOCPConnection();
connection->manager = this;
connection->socket = acceptSocket;
CreateIoCompletionPort((HANDLE) acceptSocket, iocp, ULONG_PTR(connection), 0); // The thread count is ignored in this call when just associating the socket
PTestOverlapped overlapped = new TestOverlapped(2 * (sizeof(sockaddr_in) + 16)); // As specified in documentation
overlapped->operation = soAccept;
overlapped->connection = connection;
DWORD byesReceived = 0;
int result = IOCPTest::AcceptEx
(
listenSocket,
acceptSocket,
overlapped->buffer.buf,
0, // Size of initial receiving buffer, excluding the space at the end for the two addressed
sizeof(sockaddr_in) + 16, // Sizes as specified in the Winsock 2.2 API documentation
sizeof(sockaddr_in) + 16, // Sizes as specified in the Winsock 2.2 API documentation
&byesReceived,
(LPOVERLAPPED) overlapped
);
if (!result)
{
int errorCode = WSAGetLastError();
if (errorCode != WSA_IO_PENDING)
{
std::cerr << "Error calling AcceptEx. Returned errorCode = " << errorCode << std::endl;
}
}
}
IOCPConnection *IOCPConnectionManager::createConnection()
{
IOCPConnection *connection = new IOCPConnection();
connection->manager = this;
return connection;
}
// IOCPConnection
void IOCPConnection::onAcceptEx(PTestOverlapped overlapped, DWORD numberOfBytesTransferred)
{
manager->postAcceptEx(); // Replace this accept
auto returnCode = setsockopt(socket, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, (const char *)&manager->listenSocket, sizeof(manager->listenSocket));
if (returnCode == SOCKET_ERROR)
{
std::cerr << "SetSockOpt in OnAcceptEx returned SOCKET_ERROR" << std::endl;
}
std::cout << "Connection Accepted" << std::endl;
for (int i = 0; i < manager->postedReceiveCount; ++i)
{
postRecv();
}
}
void IOCPConnection::postRecv(PTestOverlapped overlapped)
{
DWORD numberOfBytesTransferred = 0;
DWORD flags = 0;
if (overlapped == nullptr)
{
overlapped = new TestOverlapped(receiveBufferSize);
overlapped->connection = this;
}
else
{
overlapped->reset();
}
overlapped->operation = soRecv;
auto returnCode = WSARecv(socket, &(overlapped->buffer), 1, &numberOfBytesTransferred, &flags, (LPWSAOVERLAPPED) overlapped, nullptr);
}
void IOCPConnection::onRecv(PTestOverlapped overlapped, DWORD numberOfBytesTransferred)
{
if (numberOfBytesTransferred > 0)
{
byte *data = (byte *)overlapped->buffer.buf;
if (data[0] > maxByteExpected)
{
std::cerr << "Byte greater than max expected found. Max Expected: " << maxByteExpected << "; Found: " << data[0] << std::endl;
return;
}
byte next = (data[0] == maxByteExpected)?0:data[0] + 1;
for (decltype(numberOfBytesTransferred) i = 1; i < numberOfBytesTransferred; ++i)
{
if (data[i] != next)
{
// Not really the best solution for writing data out from multiple threads. Test app only.
std::cerr << "Invalid data. Expected: " << (int)next << "; Got: " << (int)data[i] << std::endl;
return;
}
else if (next == maxByteExpected)
{
next = 0;
}
else
{
++next;
}
}
//std::cout << "Valid buffer processed" << std::endl;
}
}
void IOCPConnection::onConnect(PTestOverlapped overlapped, DWORD numberOfBytesTransferred)
{
for (int i = 0; i < manager->postedSendCount; ++i)
{
// Construct a sequence of incremented byte values 0..maxByteExpected repeated numberOfGroups
PTestOverlapped sendOverlapped = new TestOverlapped((maxByteExpected + 1) * numberOfGroups);
sendOverlapped->connection = this;
for (int j = 0; j < numberOfGroups; ++j)
{
for (byte k = 0; k <= maxByteExpected; ++k)
{
((byte *)sendOverlapped->buffer.buf)[(j * (maxByteExpected + 1)) + (int)k] = k;
}
}
sendOverlapped->resend = true; // Repeat sending this data
send(sendOverlapped);
}
}
void IOCPConnection::send(PTestOverlapped overlapped)
{
overlapped->reset();
overlapped->operation = soSend;
DWORD bytesSent = 0;
DWORD flags = 0;
if (WSASend(socket, &overlapped->buffer, 1, &bytesSent, flags, (LPWSAOVERLAPPED) overlapped, nullptr) == SOCKET_ERROR)
{
int errorCode = WSAGetLastError();
if (errorCode != WSA_IO_PENDING)
{
std::cerr << "Error calling WSASend. Returned errorCode = " << errorCode << std::endl;
}
}
}
void IOCPConnection::onSent(PTestOverlapped overlapped, DWORD numberOfBytesTransferred)
{
}
void IOCPConnection::connect()
{
socket = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (socket == INVALID_SOCKET)
{
std::cerr << "Error calling socket(AF_INET, SOCK_STREAM, IPPROTO_TCP) in IOCPConnection::connect()" << std::endl;
return;
}
CreateIoCompletionPort((HANDLE)socket, manager->iocp, ULONG_PTR(this), 0); // The thread count is ignored in this call when just associating the socket
sockaddr_in localAddress = sockaddr_in();
localAddress.sin_family = AF_INET;
localAddress.sin_addr.s_addr = INADDR_ANY;
localAddress.sin_port = 0;
if (bind(socket, (SOCKADDR *) &localAddress, sizeof(localAddress)) == SOCKET_ERROR)
{
std::cerr << "Error calling bind(socket, (SOCKADDR *) &localAddress, sizeof(localAddress) in IOCPConnection::connect()" << std::endl;
return;
}
addrinfo hints = addrinfo();
addrinfo *remoteAddress = nullptr;
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
std::stringstream ss;
ss << port;
//std::cout << ss.str() << std::endl;
if (getaddrinfo(host.c_str(), ss.str().c_str(), &hints, &remoteAddress) != 0)
{
std::cerr << "Error calling getaddrinfo(host.c_str(), ss.str().c_str(), &hints, &remoteAddress) in IOCPConnection::connect()" << std::endl;
return;
}
TestOverlapped *overlapped = new TestOverlapped(0);
overlapped->connection = this;
overlapped->operation = soConnect;
BOOL result = IOCPTest::ConnectEx
(
socket,
remoteAddress->ai_addr,
remoteAddress->ai_addrlen,
nullptr,
0,
nullptr,
LPOVERLAPPED(overlapped)
);
if (result == FALSE)
{
int errorCode = WSAGetLastError();
if (errorCode != WSA_IO_PENDING)
{
//std::cerr << "Error calling ConnectEx. You'll need to add some more code if you want to know why :)" << std::endl;
std::cerr << "Error calling ConnectEx. Returned errorCode = " << errorCode << std::endl;
}
}
freeaddrinfo(remoteAddress);
}
// IOCPWorker
DWORD WINAPI IOCPWorkerThreadProc(LPVOID lpParam)
{
((IOCPWorker*)lpParam)->execute();
return 0;
}
IOCPWorker::IOCPWorker(bool suspended)
{
threadHandle = CreateThread(NULL, 0, IOCPWorkerThreadProc, this, (suspended)?CREATE_SUSPENDED:0, &threadId);
}
void IOCPWorker::start()
{
ResumeThread(threadHandle);
}
void IOCPWorker::execute()
{
//std::cout << "TMVIOCPWorker::execute()" << std::endl;
bool quit = false;
DWORD numberOfBytesTransferred = 0;
ULONG_PTR completionKey = NULL;
PTestOverlapped overlapped = nullptr;
while (!quit)
{
auto queueResult = GetQueuedCompletionStatus(manager->iocp, &numberOfBytesTransferred, &completionKey, (LPOVERLAPPED *)&overlapped, INFINITE);
if (queueResult)
{
switch (overlapped->operation)
{
case soAccept:
{
IOCPConnection *connection = overlapped->connection;
connection->onAcceptEx(overlapped, numberOfBytesTransferred);
delete overlapped;
overlapped = nullptr;
break;
}
case soConnect:
{
std::cout << "ConnectEx returned" << std::endl;
IOCPConnection *connection = overlapped->connection;
connection->onConnect(overlapped, numberOfBytesTransferred); // This method validates the received data
delete overlapped;
overlapped = nullptr;
break;
}
case soRecv:
{
//std::cout << "Received Data: " << numberOfBytesTransferred << std::endl;
IOCPConnection *connection = overlapped->connection;
connection->onRecv(overlapped, numberOfBytesTransferred); // This method validates the received data
overlapped->reset();
connection->postRecv(overlapped);
overlapped = nullptr;
break;
}
case soSend:
{
IOCPConnection *connection = overlapped->connection;
connection->onSent(overlapped, numberOfBytesTransferred);
// Send the same data over and over
std::cout << "Resending buffer" << std::endl;
if (overlapped->resend)
{
connection->send(overlapped);
}
else
{
delete overlapped;
}
overlapped = nullptr;
break;
}
default:;
}
}
}
}
}
大多数接收到的缓冲区都是正确的，但是当使用套接字的 2 个接收缓冲区和 2 个发送缓冲区运行时，我仍然有很多像这样的滚动：
Invalid data. Expected: 169; Got: 123
Invalid data. Expected: 114; Got: 89
Invalid data. Expected: 89; Got: 156
Invalid data. Expected: 206; Got: 227
Invalid data. Expected: 125; Got: 54
Invalid data. Expected: 25; Got: 0
Invalid data. Expected: 58; Got: 146
Invalid data. Expected: 33; Got: 167
Invalid data. Expected: 212; Got: 233
Invalid data. Expected: 111; Got: 86
Invalid data. Expected: 86; Got: 153
Invalid data. Expected: 190; Got: 165
Invalid data. Expected: 175; Got: 150
Invalid data. Expected: 150; Got: 217
Invalid data. Expected: 91; Got: 112
Invalid data. Expected: 95; Got: 162
Invalid data. Expected: 207; Got: 182
Invalid data. Expected: 222; Got: 243
Invalid data. Expected: 126; Got: 101
Invalid data. Expected: 157; Got: 132
Invalid data. Expected: 160; Got: 89
Invalid data. Expected: 205; Got: 180
Invalid data. Expected: 113; Got: 134
Invalid data. Expected: 45; Got: 20
Invalid data. Expected: 113; Got: 201
Invalid data. Expected: 64; Got: 198
Invalid data. Expected: 115; Got: 182
Invalid data. Expected: 140; Got: 115
我希望这只是我做错的一些简单的事情。在发送之前，我在数据缓冲区上运行了与接收时相同的验证，以确保我没有在那里做一些愚蠢的事情，但它通过了该检查。我用另一种语言编写了一个服务器not使用IOCP，似乎可以正确接收数据。我还用另一种语言编写了一个客户端，IOCP 服务器似乎也在这种情况下检测到损坏。但话虽如此，客户端和服务器都可能存在问题。我很感激任何人愿意为此花费时间。
