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分享如何判断串口是否被监控
我做了一个小程序，向串口发送数据，如何才能判断我要发送数据的串口有没有被拦截，主要是不想让别人看见我发的数据，前问如何判断电脑上是否开了串口拦截软件？
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ling1980 2019-06-07
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监控端口的程序是不占用端口的，如果监控串口的程序占用端口，它还监控谁啊？
hrtem 2019-06-03
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串口资源应该是独占的，可是尝试打开，如果成功就是没被监视。
ling1980 2019-06-02
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能不能讲解一下他的原理，或者给一个完整的代码，谢谢了
schlafenhamster 2019-06-02
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https://download.csdn.net/download/schlafenhamster/5202391
本程序 窥视 串口的 活动。主要 hook 了： {"KERNEL32.DLL", "CreateFileA","myCreateFileA",(FARPROC)myCreateFileA}, {"KERNEL32.DLL", "CreateFileW","myCreateFileW",(FARPROC)myCreateFileW}, {"KERNEL32.DLL", "GetCommState","myGetCommState",(FARPROC)myGetCommState}, {"KERNEL32.DLL", "ReadFile", "myReadFile", (FARPROC)myReadFile}, {"KERNEL32.DLL", "ReadFileEx", "myReadFileEx", (FARPROC)myReadFileEx}, {"KERNEL32.DLL", "WriteFile", "myWriteFile", (FARPROC)myWriteFile}, {"KERNEL32.DLL", "WriteFileEx","myWriteFileEx",(FARPROC)myWriteFileEx}, {"KERNEL32.DLL", "CloseHandle","myCloseHandle",(FARPROC)myCloseHandle},
本程序 窥视 串口的 活动。主要 hook 了： {"KERNEL32.DLL", "CreateFileA","myCreateFileA",(FARPROC)myCreateFileA}, {"KERNEL32.DLL", "CreateFileW","myCreateFileW",(FARPROC)myCreateFileW}, {"KERNEL32.DLL", "GetCommState","myGetCommState",(FARPROC)myGetCommState}, {"KERNEL32.DLL", "ReadFile", "myReadFile", (FARPROC)myReadFile}, {"KERNEL32.DLL", "ReadFileEx", "myReadFileEx", (FARPROC)myReadFileEx}, {"KERNEL32.DLL", "WriteFile", "myWriteFile", (FARPROC)myWriteFile}, {"KERNEL32.DLL", "WriteFileEx","myWriteFileEx",(FARPROC)myWriteFileEx}, {"KERNEL32.DLL", "CloseHandle","myCloseHandle",(FARPROC)myCloseHandle},
zgl7903 2019-06-01
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如果人家在外面并接一个串口接收， 你怎么监控？
kuangbao9 2019-06-01
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你可以加密发送接收呀
schlafenhamster 2019-06-01
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下面是 hook comm的 例子
/*
first call: "\\.\COM1 CreateFileW"
then call: "\\.\COM1 CreateFileA"
*/
HANDLE WINAPI myCreateFileA(LPCSTR lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode,
LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition,
DWORD dwFlagsAndAttributes, HANDLE hTemplateFile)
{// unhook first
g_HookApi.UnhookOneApi(&myapi_info[CREATEFILEA]);
HANDLE handle=CreateFileA(lpFileName, dwDesiredAccess, dwShareMode, lpSecurityAttributes,
dwCreationDisposition, dwFlagsAndAttributes, hTemplateFile);
// hook again
g_HookApi.HookOneApi(&myapi_info[CREATEFILEA]);
//
if(handle != INVALID_HANDLE_VALUE)
{// handle
if(g_CommFile != handle)// not comes
{// because first call: "\\.\COM1 CreateFileW"
char *CommPort=0;
CommPort=strrchr(lpFileName,'\\');
if(CommPort) CommPort++;
else CommPort=(char*)lpFileName;
if(strnicmp(CommPort,"COM",3)==0)
{//save handle and port name
g_CommFile=handle;
strcpy(g_CommStruc.CommName,CommPort);
#ifdef _DEBUG
SendData2Dialog(WM_CFA_MSG,(BYTE*)(g_CommStruc.CommName),strlen(g_CommStruc.CommName)+1);
#endif
}
}
}
return handle;
}
//
HANDLE WINAPI myCreateFileW(LPCWSTR lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode,
LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition,
DWORD dwFlagsAndAttributes, HANDLE hTemplateFile)
{// unhook first
g_HookApi.UnhookOneApi(&myapi_info[CREATEFILEW]);
HANDLE handle=CreateFileW(lpFileName, dwDesiredAccess, dwShareMode, lpSecurityAttributes,
dwCreationDisposition, dwFlagsAndAttributes, hTemplateFile);
// hook again
g_HookApi.HookOneApi(&myapi_info[CREATEFILEW]);
//
if(handle != INVALID_HANDLE_VALUE)
{
if(g_CommFile != handle)
{
char fname[MAX_PATH]={0};//'\\.\COM1'
WideCharToMultiByte(CP_ACP, 0, lpFileName, -1, fname, MAX_PATH/2 ,NULL,NULL);
char *CommPort=0;
CommPort=strrchr(fname,'\\');
if(CommPort) CommPort++;
else CommPort=fname;
if(strnicmp(CommPort,"COM",3)==0)
{//save handle and port name
g_CommFile = handle;
strcpy(g_CommStruc.CommName,CommPort);
#ifdef _DEBUG
SendData2Dialog(WM_CFW_MSG,(BYTE*)(g_CommStruc.CommName),strlen(g_CommStruc.CommName)+1);
#endif
}
}
}
return handle;
}
