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ext4 解包和打包

2020-5-14

环境：

Ubuntu

解包工具：

sudo apt-get install android-tools-fsutils

转换文件：

simg2img rootfs_256M.ext4 rootfs_256M

挂载

mkdir /tmp/rootfs

mount -o loop rootfs_256M /tmp/rootfs

修改

重新打包

make_ext4fs -l XXXXM -s rootfs_256M.ext4 /tmp/rootfs

标签: ext4 解包打包

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IDEA导入jave-1.0.2 xuggle-xuggler-5.4

2020-1-3

1.配置pom.xml

<dependency>
<groupId>it.sauronsoftware</groupId>
<artifactId>jave</artifactId>
<version>1.0.2</version>
</dependency>

<dependency>
<groupId>xuggle</groupId>
<artifactId>xuggle-xuggler</artifactId>
<version>5.4</version>
</dependency>

2. 从网上下载jave-1.0.2 xuggle-xuggler-5.4

http://www.sauronsoftware.it/projects/jave/download.php

https://mvnrepository.com/artifact/xuggle/xuggle-xuggler/5.4

3. 拷贝对应的jar文件到目录中

C:\Program Files\JetBrains\apache-maven-3.5.0\repo\it\sauronsoftware\jave\1.0.2
C:\Program Files\JetBrains\apache-maven-3.5.0\repo\xuggle\xuggle-xuggler\5.4

标签: java idea

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windows 与 USB设备进行数据交换实现

2019-12-5 C++

需求：上位机通过USB与下位机进行数据交互

实现：

打开设备：

static LONG HidOpen(DWORD HidUsbMian, DWORD HidUsbSub)
{
//hid设备GUID
CString strHidPath(_T(""));
HDEVINFO deviceInfoSet = INVALID_HANDLE_VALUE;
PSP_DEVICE_INTERFACE_DETAIL_DATA pDeviceInterfaceDetailData = NULL;
SP_DEVINFO_DATA devinfoData;
SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
ZeroMemory(&deviceInterfaceData, sizeof(SP_DEVICE_INTERFACE_DATA));
ZeroMemory(&devinfoData, sizeof(SP_DEVINFO_DATA));
devinfoData.cbSize = sizeof(SP_DEVINFO_DATA);
deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
GUID interfaceClassGuid = {0x4d1e55b2, 0xf16f, 0x11cf, {0x88, 0xcb, 0x00, 0x11, 0x11, 0x00, 0x00, 0x30} };
deviceInfoSet = SetupDiGetClassDevsA(&interfaceClassGuid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
int deviceIndex = 0;
BOOL bExit = FALSE;
for ( ; bExit == FALSE; )
{
do
{
HANDLE writeHandle = INVALID_HANDLE_VALUE;
DWORD dwRequiredSize = 0;
BOOL res = SetupDiEnumDeviceInterfaces(deviceInfoSet,
NULL,
&interfaceClassGuid,
deviceIndex,
&deviceInterfaceData);
if (res == FALSE)
{
bExit = TRUE;
break;
}

BOOL bFind = FALSE;
for (int i = 0; ; ++i)
{
TCHAR szDriverName[MAX_PATH] = { 0 };
res = SetupDiEnumDeviceInfo(deviceInfoSet, i, &devinfoData);
if (res == FALSE)
{
break;
}
res = SetupDiGetDeviceRegistryProperty(deviceInfoSet, &devinfoData,
SPDRP_CLASS, NULL, reinterpret_cast<PBYTE>(szDriverName), sizeof(szDriverName), NULL);
if (res == FALSE)
{
break;
}
if (_tcscmp(szDriverName, _T("HIDClass")) == 0)
{
res = SetupDiGetDeviceRegistryProperty(deviceInfoSet, &devinfoData,
SPDRP_DRIVER, NULL, reinterpret_cast<PBYTE>(szDriverName), sizeof(szDriverName), NULL);
if (res == TRUE)
{
bFind = TRUE;
break;
}
}
}
//不是有效的设备的继续
if (FALSE == bFind)
{
break;
}
res = SetupDiGetDeviceInterfaceDetail(deviceInfoSet,
&deviceInterfaceData,
NULL,
0,
&dwRequiredSize,
NULL);
pDeviceInterfaceDetailData = reinterpret_cast<PSP_DEVICE_INTERFACE_DETAIL_DATA>(malloc(dwRequiredSize));
pDeviceInterfaceDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
res = SetupDiGetDeviceInterfaceDetail(deviceInfoSet,
&deviceInterfaceData,
pDeviceInterfaceDetailData,
dwRequiredSize,
NULL,
NULL);

writeHandle = CreateFile(pDeviceInterfaceDetailData->DevicePath, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
/*FILE_FLAG_OVERLAPPED,/*FILE_ATTRIBUTE_NORMAL,*/
if (writeHandle == INVALID_HANDLE_VALUE)
{
break;
}
HIDD_ATTRIBUTES attrib;
attrib.Size = sizeof(HIDD_ATTRIBUTES);
HidD_GetAttributes(writeHandle, &attrib);
/*
if ((HidUsbMian == 0x0 || attrib.VendorID == HidUsbMian)
&& (HidUsbSub == 0x0 || attrib.ProductID == HidUsbSub))
*/
if (attrib.VendorID == HidUsbMian && attrib.ProductID == HidUsbSub)
{
strHidPath = pDeviceInterfaceDetailData->DevicePath;
}
CloseHandle(writeHandle);
} while (0);
if (pDeviceInterfaceDetailData != NULL)
{
free(pDeviceInterfaceDetailData);
pDeviceInterfaceDetailData = NULL;
}
if (strHidPath != _T(""))
{
break;
}
++deviceIndex;
}
if (strHidPath == _T(""))
{
return 0;
}

HANDLE openHandle = CreateFile(strHidPath,
GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_FLAG_OVERLAPPED, 0);
HANDLE readHandle = CreateFile(strHidPath,
GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
0, 0);
/*FILE_FLAG_OVERLAPPED,/*FILE_ATTRIBUTE_NORMAL,*/
if (openHandle == INVALID_HANDLE_VALUE)
{
return NULL;
}
do
{
PHIDP_PREPARSED_DATA ppData = NULL;
HIDP_CAPS caps;
if (0)//0 == HidD_SetNumInputBuffers(openHandle, 512))
{
::OutputDebugString(_T("-------------HidD_SetNumInputBuffers Failed-------\r\n"));
break;
}
if (0 == HidD_GetPreparsedData(openHandle, &ppData))
{
::OutputDebugString(_T("-------------HidD_GetPreparsedData Failed-------\r\n"));
break;
}

NTSTATUS ntStatus = HidP_GetCaps(ppData, &caps);
if (ntStatus != HIDP_STATUS_SUCCESS)
{
::OutputDebugString(_T("-------------HidP_GetCaps Failed-------\r\n"));
break;
}
{
CString strMsg(_T(""));
strMsg.Format(_T("--Input Length[%d]---Output Length[%d]----\r\n"), caps.InputReportByteLength, caps.OutputReportByteLength);
::OutputDebugString(strMsg);
}
HidD_FreePreparsedData(ppData);
PHidDevice dev = NewHidDevice();
if (dev != NULL)
{
dev->deviceHandle = openHandle;
dev->deviceReadHandle = readHandle;
int nBufLen = (strHidPath.GetLength() + 1);
dev->devicePath = new TCHAR[nBufLen];
if (dev->devicePath != NULL)
{
memset(dev->devicePath, 0, nBufLen * sizeof(TCHAR));
_tcscpy_s(dev->devicePath, nBufLen, strHidPath.GetString());
}
}
return reinterpret_cast<long>(dev);
} while (0);

if (openHandle != INVALID_HANDLE_VALUE)
{
CloseHandle(openHandle);
openHandle = INVALID_HANDLE_VALUE;
}
if (readHandle != INVALID_HANDLE_VALUE)
{
CloseHandle(readHandle);
readHandle = INVALID_HANDLE_VALUE;
}
return 0;
}
读数据：

ReadFile(handle, buf, 18, &dwReaded, NULL) ；

写数据：

OVERLAPPED ol;
memset(&ol, 0, sizeof(OVERLAPPED));
ol.hEvent = ::CreateEventA(NULL, TRUE, FALSE, NULL);
do
{
int nCurLen = nBufSize >= 8 ? 8 : nBufSize;
memset(buf, 0, 11);
buf[0] = 0x00;
buf[1] = LOBYTE(nCurLen);
buf[2] = 0x00;
memcpy(buf + 3, pTmp, nCurLen);
ResetEvent(ol.hEvent);
BOOL bRet = WriteFile(dev->deviceHandle, reinterpret_cast<LPVOID>(buf), 11, &dwWrited, &ol);
if (bRet == FALSE)
{
DWORD dwTmp = 0;
GetOverlappedResult(dev->deviceHandle, &ol, &dwTmp, TRUE);
}

pTmp += nCurLen;
nBufSize -= nCurLen;
} while (nBufSize > 0);

if (ol.hEvent != NULL)
{
CloseHandle(ol.hEvent);
}
坑1：

传输大数据时，在有的电脑，会出现卡死情况

解决方式：

读跟写句柄分开创建，具体原因不明

标签: c++ USB 设备读写

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MFC 函数注入

2019-11-22 C++

问题：

USB 通信DLL代码找不到，无法知道通信协议

解决思路：

注入windows相关接口，查看通信过程中发送的协议

实现代码：比如注入CreateFile

typedef HANDLE(WINAPI * Real_CreateFile) (
LPCWSTR lpFileName,
DWORD dwDesiredAccess,
DWORD dwShareMode,
LPSECURITY_ATTRIBUTES lpSecurityAttributes,
DWORD dwCreationDisposition,
DWORD dwFlagsAndAttributes,
HANDLE hTemplateFile);

1. 保存函数调用地址

BYTE g_oldJmp[6] = { 0 };
BYTE g_jmp[6] = { 0 };

2. 实现注入函数执行函数前先恢复原接口函数地址，执行完再设置为更改后的地址

HANDLE WINAPI Routed_CreateFile(
LPCWSTR lpFileName,
DWORD dwDesiredAccess,
DWORD dwShareMode,
LPSECURITY_ATTRIBUTES lpSecurityAttributes,
DWORD dwCreationDisposition,
DWORD dwFlagsAndAttributes,
HANDLE hTemplateFile)
{
CStringW strTmp(lpFileName);
HANDLE handle = NULL;
VirtualProtect((LPVOID)g_pOrigCreateFile, 6, g_myProtect, NULL); //ReadWrite again
memcpy(g_pOrigCreateFile, g_oldJmp, 6); //Unhook API
handle = CreateFileW(strTmp.GetString(), dwDesiredAccess, dwShareMode, lpSecurityAttributes, dwCreationDisposition, dwFlagsAndAttributes, hTemplateFile);
memcpy(g_pOrigCreateFile, g_jmp, 6); //Rehook API
VirtualProtect((LPVOID)g_pOrigCreateFile, 6, g_oldProtect, NULL); //Normal setts
CStringW strMsg(_T(""));
strMsg.Format(L"%s %x %x %x %x %x\r\n", strTmp.GetString(), dwDesiredAccess, dwShareMode, handle, dwCreationDisposition, dwFlagsAndAttributes);
::OutputDebugStringW(strMsg);
return handle;
}

//注入接口
void BeginRedirect(LPVOID newFunction, LPVOID oldFunction, BYTE *jmp, BYTE *oldJmp)
{
BYTE tempJMP[6] = {0xE9, 0x90, 0x90, 0x90, 0x90, 0xC3};
memcpy(jmp, tempJMP, 6);
DWORD dwJMPSize = (reinterpret_cast<DWORD>(newFunction) - reinterpret_cast<DWORD>(oldFunction) - 5);
VirtualProtect(oldFunction, 6, PAGE_EXECUTE_READWRITE, &g_oldProtect);
//Change memory settings to make sure we can write the JMP in
memcpy(oldJmp, oldFunction, 6); //Copy old bytes before writing JMP
memcpy(&jmp[1], &dwJMPSize, 4); //Write the address to JMP to
memcpy(oldFunction, jmp, 6); //Write it in process memory
VirtualProtect((LPVOID)oldFunction, 6, g_oldProtect, NULL); //Change
}

//初始化

g_pOrigCreateFile = reinterpret_cast<Real_CreateFile>(GetProcAddress(GetModuleHandle("Kernel32.dll"), "CreateFileW"));
if (g_pOrigCreateFile != NULL)
{
BeginRedirect(Routed_CreateFile, g_pOrigCreateFile, g_jmp, g_oldJmp);
}

标签: c++ 函数hook

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局域网内异常DHCP服务器查找

2019-4-27

现象：

公司内部局域网突然上不了网，使用ipconfig查看了下IP，非路由器分配的

故障排查：

1. 启动wireshark，输入过滤条件bootp

2. 接入网线

3. 查看wireshark抓包到的DHCP ACK源MAC地址

4. 查看公司内部谁的电脑MAC地址与之相同，关闭DHCP服务

标签: DHCP

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海康威视GB28181视频流接收解析显示

2019-3-1

海康威视国标GB28181获取视频流并显示

环境：

MFC,jRtp,ffmpeg,sdl2.0,eXosip,

海康威视摄像头：DS-2CD3T27EDWD-L

思路：

利用eXosip实现sip服务端及客户端，实现GB28181协议交互

利用jRtp接收摄像头rtp视频流

利用ffmpeg解码视频流（由于海康威视ps视频流里面含有一些私有协议会导致花屏，因此这边需要先把ps流解析成H264视频流）

利用sdl显示视频

标签: c++ ffmpeg rtp SDL

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wireshark抓包数据获取rtsp请求的视频流

2019-1-17 C++

lua脚本下载：https://github.com/volvet/h264extractor

1. 安装wireshark软件

2. 编辑wireshark安装目录底下的init.lua,设置disable_lua = false;

3. 在init.lua的最后加上dofile(DATA_DIR.."rtp_h264_extractor.lua")

4. 把rtp_h264_extractor.lua放在wireshark同一路径下

5. 打开wireshark抓取的网络数据流

6.设置过滤条件分析：如rtsp.method == "PLAY" && ip.src == 1.1.1.1

获取ip地址为1.1.1.1请求的所有rtsp视频流

7.通过tcp端口获取要分析的视频流的所有交互数据:如tcp.port == 57109

获取通过57109该端口交互的rtsp视频流数据

8.导出该视频流数据：文件->导出特定分组 All packets Displayed

9.查看导出的数据视频流编码格式：

查找抓包数据服务端对客户端DESCRIBE请求的回复数据包，找到Media Attribute节点

查看编码是否H264，及type值如96,如是H264则继续往下

10.设置H264的编码载体类型

编辑->首选项->Protocols->H264设置H264 dynamic payload types为96

11.导出H264数据裸流：工具->Extract h264 stream from RTP

12.在数据流的同一目录底下生成dump.264

13.打开vlc，设置分流器为H264

工具->偏好设置->全部（出来高级偏好设置）->输入/编解码器->分流器->分流模块->H264

14.编号生成的dump.264文件

标签: wireshark H264 rtsp

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CStdioFile Unicode ReadString 读取汉字乱码

2018-10-21 C++

1. Unicode 模式下ReadString 需要使用typebinary读取文本，中文才不会乱码

CStdioFile file;

if (file.Open(filePath, CFile::modeRead | CFile::typeBinary) == TRUE)
{
CString strLine(_T(""));
WORD sign;
file.Read(&sign, 2);
while (file.ReadString(strLine))
{
m_listInfo.InsertString(m_listInfo.GetCount(), strLine);
}
file.Close();
}

标签: MFC StdioFile ReadString

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MFC CEdit背景透明,文字透明实现

2018-6-17

需求:不规则输入框实现

实现:

1. 响应对话框的WM_CTLCOLOR消息

获取EDIT对应的窗口背景色,设置画刷为NULL

if (nCtlColor == CTLCOLOR_EDIT)

{
pDC->SetTextColor(RGB(255, 255, 255));
pDC->SetBkMode(TRANSPARENT);
CDC* dc = GetDC();
CRect rc;
pWnd->GetWindowRect(rc);
ScreenToClient(rc);

pDC->BitBlt(0, 0, rc.Width(), rc.Height(), dc, rc.left, rc.top, SRCCOPY);
return (HBRUSH)::GetStockObject(NULL_BRUSH);

}
2. 响应EN_CHANGE消息

获取控件所在的位置,通知窗口进行刷新

CRect rc;
GetDlgItem(IDC_EDIT_USER_NAME)->GetWindowRect(&rc);
ScreenToClient(&rc);
InvalidateRect(&rc, TRUE);

标签: MFC CEdit 背景透明

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Parasoft c++test 9.6安装使用导引交叉编译

2018-5-12

Parasoft c++test 9.6安装使用导引

参考：https://blog.csdn.net/flyoxs/article/details/53524044

参考: https://docs.parasoft.com/display/CPPDESKE1033

安装

直接照文档一步步安装，略过

通用过程

1. 创建C++ Test测试项目

1.VS项目

2.linux MakeFile项目

使用cpptestscan工具生成BDF文件

2.运行分析

3.复查结果

生成BDF文件

修改Makefile ，在CC/CXX前添加cpptestscan完成路径

自定义编译器

针对嵌入式代码，找不到合适的编译器，需要自己创建创建编译器

步骤：

https://docs.parasoft.com/display/CPPDESKE1033/Configuring+Testing+with+the+Cross+Compiler

注：不知道交叉编译的GCC版本的话选择最新的GCC 如（4.9.x),

如选择的GCC版本低于交叉编译器的GCC版本，可能会实际编译通过但是CPPC++Test编译报错！

修改项目编译器

BugDetective

可能出现错误结果

1. __atomic_fetch_add" is undefined

自定义编译器对应的gcc版本太低

2. 类成员变量申明时直接初始化报错

自定义编译器对应的gcc版本太低

标签: Parasoft 交叉编译 arm

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