当我尝试在函数中向我的向量中推送一个元素时，我得到一个Access违规读取位置，但是如果我在类构造函数中这样做它就可以了。
提出问题的类的头文件
#include <winsock2.h>
#include <string>
#include <vector>
#pragma comment(lib,"ws2_32.lib") //Winsock Library
class Network{
public:
/*
* General functions
*/
Network();
Network(bool debugModus);
~Network();
/*
* Server Functions
*/
int ServerSetup(int port);
void ServerAcceptConnections();
/*
* Server variable
*/
SOCKET m_client;
std::vector<SOCKET> m_clientList;
};
cpp
void Network::ServerAcceptConnections()
{
SOCKET new_socket;
m_clientList.push_back(new_socket);
}
主要
void main ()
{
Network network (true);
network.ServerSetup(800);
while(true)
{
network.ServerAcceptConnections();
}
}
如果我执行命令： m_clientList.push_back（new_socket）; 在类构造函数中它工作，我可以在调试器中看到它， 但当我到达ServerAcceptsConnection（）函数时，它确实包含anny元素。 如果我尝试在那里添加somthing我得到这个错误： server.exe中0x00c730ab处的未处理异常：0xC0000005：访问冲突读取位置0x01000083。
编辑整个代码 标题
#include <winsock2.h>
#include <string>
#include <vector>
#pragma comment(lib,"ws2_32.lib") //Winsock Library
struct Message{
char* message;
unsigned int max_size;
unsigned int size;
};
class Network{
public:
/*
* General functions
*/
Network();
Network(bool debugModus);
int Connect(std::string ipAddress, int port);
int Send(SOCKET socket, char* message, unsigned int size);
Message Receive(SOCKET socket, int size = 2000);
~Network();
/*
* Server Functions
*/
int ServerSetup(int port);
void ServerAcceptConnections();
private:
/*
* General Functions
*/
int Init();
/*
* Server functions
*/
int Bind(int port);
int Listen();
/*
* General Variable
*/
bool m_debugModus;
WSADATA m_wsa;
SOCKET m_s;
struct sockaddr_in m_server;
/*
* Server variable
*/
SOCKET m_client;
std::vector<SOCKET> m_clientList;
std::vector<Message> m_outBuffer;
std::vector<Message> m_inBuffer;
};
the cpp
#include "NetworkClass.h"
#include<stdio.h>
Network::Network()
{
m_debugModus = false;
Init();
}
Network::Network(bool debugModus)
{
m_debugModus = true;
if(m_debugModus) printf("\nDEBUG MODUS!!");
if(m_debugModus) printf("\nThis mode is for debugging only!!");
if(m_debugModus) printf("\n");
if(m_debugModus) printf("\n");
Init();
}
int Network::Init()
{
SOCKET new_socket;
m_clientList.push_back(new_socket);
if(m_debugModus) printf("\nDEBUG MODUS: Initialising Winsock...");
if (WSAStartup(MAKEWORD(2,2),&m_wsa) != 0)
{
if(m_debugModus) printf("DEBUG MODUS: Failed. Error Code : %d",WSAGetLastError());
return 1;
}
if(m_debugModus) printf(" Initialised.\n");
/*
* creating a socket
*
* Settings:
* Address Family : AF_INET (this is IP version 4)
* Type : SOCK_STREAM (this means connection oriented TCP protocol)
* Protocol : 0 [ or IPPROTO_TCP , IPPROTO_UDP ]
*/
if((m_s = socket(AF_INET , SOCK_STREAM , 0 )) == INVALID_SOCKET)
{
if(m_debugModus) printf("DEBUG MODUS: Could not create socket : %d" , WSAGetLastError());
}
if(m_debugModus) printf("DEBUG MODUS: Socket created.\n");
return 0;
}
int Network::Connect(std::string ipAddress, int port)
{
if(m_debugModus) printf("DEBUG MODUS: Trying to connect with: %s on port %d \n", ipAddress.c_str(), port);
m_server.sin_addr.s_addr = inet_addr(ipAddress.c_str());
m_server.sin_family = AF_INET;
m_server.sin_port = htons( port );
if (connect(m_s , (struct sockaddr *)&m_server , sizeof(m_server)) < 0)
{
if(m_debugModus) printf("DEBUG MODUS: Error cant open a connecting\n", ipAddress, port);
return 1;
}
if(m_debugModus) printf("DEBUG MODUS: Connected\n");
return 0;
}
int Network::Send(SOCKET socket, char* message, unsigned int size)
{
if( send(socket , message , size , 0) < 0)
{
if(m_debugModus) printf("DEBUG MODUS: Send failed error: %d\n", WSAGetLastError());
return 1;
}
if(m_debugModus) printf("DEBUG MODUS: Data Send\n");
return 0;
}
Message Network::Receive(SOCKET socket, int size)
{
Message message;
message.message = (char*) malloc(sizeof(char)*size);
message.max_size = size;
if((message.size = recv(socket , message.message , message.max_size , 0)) == SOCKET_ERROR)
{
if(m_debugModus) printf("DEBUG MODUS: recv failed");
}
if(m_debugModus) printf("DEBUG MODUS: Reply received\n");
return message;
}
int Network::Bind(int port)
{
m_server.sin_family = AF_INET;
m_server.sin_addr.s_addr = INADDR_ANY;
m_server.sin_port = htons( port );
if( bind(m_s ,(struct sockaddr *)&m_server , sizeof(m_server)) == SOCKET_ERROR)
{
if(m_debugModus) printf("DEBUG MODUS: Bind failed with error code : %d\n" , WSAGetLastError());
return 1;
}
if(m_debugModus) printf("DEBUG MODUS: Bind done\n");
return 0;
}
int Network::Listen()
{
listen(m_s , 3);
return 0;
}
int Network::ServerSetup(int port)
{
Bind(port);
Listen();
return 0;
}
void Network::ServerAcceptConnections()
{
SOCKET new_socket;
int c = sizeof(struct sockaddr_in);
new_socket = accept(m_s , (struct sockaddr *)&m_client, &c);
if (new_socket != INVALID_SOCKET )
{
if(m_debugModus) printf("DEBUG MODUS: Connection accepted\n");
//Reply to the client
Send(new_socket, "Hello Client , I have received your connection. But I have to go now, bye\n", strlen("Hello Client , I have received your connection. But I have to go now, bye\n"));
m_clientList.push_back(new_socket);
}
if (new_socket == INVALID_SOCKET)
{
if(m_debugModus) printf("DEBUG MODUS: accept failed with error code : %d" , WSAGetLastError());
}
}
Network::~Network()
{
closesocket(m_s);
WSACleanup();
}
答案 0 :(得分：2)
看起来你超出了矢量的容量。在while(true)循环中，您正在调用network.ServerAcceptConnections();函数，该函数在每次调用时构造一个SOCKET对象，然后将其推送到m_clientList，并且它无限期地执行此操作（作为while无限期运行）。至少这是看着你的代码剪断的情况。
另一方面，类构造函数只被调用一次。
答案 1 :(得分：0)