C++ &引用;运行时检查失败#2-围绕变量';文件路径';“腐败了”;在调试模式下
我在使用winsock2时遇到了此函数的问题。当程序以调试模式离开此函数时,我收到2条语句(仅在退出此函数时): “运行时检查失败#2-变量'filePath'周围的堆栈已损坏。” “运行时检查失败#2-变量'recBuf'周围的堆栈已损坏。” 我在VS2008 C++(控制台应用程序)编程。 在发布模式下,此语句不存在 所以我在等待回复,非常感谢您的帮助;) 功能:C++ &引用;运行时检查失败#2-围绕变量';文件路径';“腐败了”;在调试模式下,c++,visual-studio,stack-overflow,C++,Visual Studio,Stack Overflow,我在使用winsock2时遇到了此函数的问题。当程序以调试模式离开此函数时,我收到2条语句(仅在退出此函数时): “运行时检查失败#2-变量'filePath'周围的堆栈已损坏。” “运行时检查失败#2-变量'recBuf'周围的堆栈已损坏。” 我在VS2008 C++(控制台应用程序)编程。 在发布模式下,此语句不存在 所以我在等待回复,非常感谢您的帮助;) 功能: #include "stdafx.h" #include "server.h" bool Server::fileReceiv
#include "stdafx.h"
#include "server.h"
bool Server::fileReceive()
{
char recBuf[MAX_PACKET_BUFOR] ={0};
char filePath[100] = {0};
int size = 0;
int var = 0;
char key = 0;
int tmp=0;
FILE *fPtr = NULL;
if(recv(clientSocket, recBuf, MAX_PACKET_SIZE, 0) == 0)
{
cerr << "Receive ERROR" << endl;
system("pause");
return false;
}
if(strcmp(recBuf, START_HEADER) != 0)
return false;
if(send(clientSocket, ACK, 3, 0 ) == SOCKET_ERROR)
{
cerr << "Send ERROR" << endl;
system("pause");
return false;
}
if(recv(clientSocket, recBuf, MAX_PACKET_SIZE, 0) == 0)
{
cerr << "Receive ERROR" << endl;
system("pause");
return false;
}
if(send(clientSocket, ACK, 3, 0 ) == SOCKET_ERROR)
{
cerr << "Send ERROR" << endl;
system("pause");
return false;
}
strcpy_s(filePath, sizeof(recBuf), recBuf);
cout << "Przyslano plik o nazwie: \"" << filePath << "\"";
memset(recBuf, 0, sizeof(recBuf));
if(recv(clientSocket, recBuf, MAX_PACKET_SIZE, 0) == 0)
{
cerr << "Receive ERROR" << endl;
system("pause");
return false;
}
if(send(clientSocket, ACK, 3, 0 ) == SOCKET_ERROR)
{
cerr << "Send ERROR" << endl;
system("pause");
return false;
}
size = atoi(recBuf);
cout << " i rozmiarze: "<< size << "B,\nCo chcesz zrobic?" << endl;
cout << "1 - odbierz i zmien nazwe\n2- odbierz i zapisz do katalogu programu\n3 - odrzuc" << endl;
key = _getch();
if(key == '1' || key == '2')
{
if(key == '1')
{
cout << "Podaj sciezke dla nowego pliku w formie: Dysk:\\sciezka\\plik.rozszerzenie" << endl;
cout << "(wpisz sama nazwe, a plik zostanie umieszczony w katalogu programu)" << endl;
cin >> filePath;
}
if(fopen_s(&fPtr, filePath, "wb") != 0)
return false;
cout << "Odbieranie w toku...\nProsze czekac" << endl;
while(size > 0)
{
memset(recBuf, 0, MAX_PACKET_BUFOR);
tmp = 0;
if(size <= 200000)
cout << "break" << endl;
if(size>=MAX_PACKET_SIZE)
{
do
{
var = recv(clientSocket, recBuf, MAX_PACKET_SIZE, 0);
if(var == 0)
{
cerr << "Receive ERROR" << endl;
system("pause");
size = 0;
}
else
{
tmp += var;
fwrite(recBuf, var, 1, fPtr);
}
}while(tmp < MAX_PACKET_SIZE && size != 0);
if(send(clientSocket, ACK, 3, 0 ) == SOCKET_ERROR)
{
cerr << "Send ERROR" << endl;
system("pause");
return false;
}
}
else
{
while(tmp != size && size != 0)
{
var = recv(clientSocket, recBuf, size, 0);
if(var == 0)
{
cerr << "Receive ERROR" << endl;
system("pause");
size = 0;
}
else
{
tmp += var;
fwrite(recBuf, var, 1, fPtr);
}
}
if(send(clientSocket, ACK, 3, 0 ) == SOCKET_ERROR)
{
cerr << "Send ERROR" << endl;
system("pause");
return false;
}
}
size -= tmp;
size = (size < 0) ? 0 : size;
}
memset(filePath, 0, sizeof(filePath));
memset(recBuf, 0, MAX_PACKET_BUFOR);
fclose(fPtr);
}
return true;
}
#包括“stdafx.h”
#包括“server.h”
bool服务器::fileReceive()
{
char recBuf[MAX_PACKET_BUFOR]={0};
char filePath[100]={0};
int size=0;
int-var=0;
字符键=0;
int-tmp=0;
文件*fPtr=NULL;
if(recv(clientSocket,recBuf,最大数据包大小,0)=0)
{
cerr错误在下面一行
strcpy_s(filePath, sizeof(recBuf), recBuf);
这里您说明的filePath
的大小是sizeof(recBuf)
,情况并非如此。filePath
的大小是100,而sizeof(recBuf)
的大小是1000010。结果是filePath
上的缓冲区溢出以及您看到的错误消息
此外,代码似乎假设recv
调用将正确地向recBuf
缓冲区添加空终止符。情况并非如此,如果未向缓冲区添加0,则strcpy_s
函数也可能会失败。thx非常感谢您的快速回复。它现在可以正常工作:)
strcpy_s(filePath, sizeof(recBuf), recBuf);