我无法连接到命名管道(在这种情况下为快速cgi命名管道),根据MSDN,我应该使用CreateFile()或CallNamedPipe()(平面C API,同步-没有重叠的I / O) http:/ /msdn.microsoft.com/zh-CN/library/aa363858(VS.85).aspx
但是我得到了INVALID_HANDLE_VALUE,当我GetLastError()时它为零!
我也想知道是否可以用枚举所有命名管道。某种调用,然后解析出我正在寻找的那个:“ \。\ pipe \ FastCGI \”
并没有人有这些评论的经验:http : //blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/225878
问题出在这里:
TmpInfo = DirInfo;
while(1)
{
if(TmpInfo->NextEntryOffset==0)
break;
TmpInfo->FileDirectoryInformationClass.FileName[TmpInfo->FileNameLength/sizeof(WCHAR)] = NULL;
wprintf(L"%s (%d, %d)\n",TmpInfo->FileDirectoryInformationClass.FileName,
TmpInfo->EndOfFile.LowPart,
TmpInfo->AllocationSize.LowPart );
TmpInfo = (PFILE_QUERY_DIRECTORY)((DWORD)TmpInfo+TmpInfo->NextEntryOffset);
}
Run Code Online (Sandbox Code Playgroud)
在“ while(1)”之后,您检查Next EntryOffset == 0是否表示最后一个条目从未被报告,请移动“ if(...)break;”。到“ wprintf(...)”调用之后,您应该能够枚举所有管道。
编辑
对于那些想要完整源代码(不需要DDK)的人,这里是。请注意,这不是我的代码,可以在这里找到。此代码与原始代码之间的唯一变化是上述错误修复。
编辑v2.0
在下面的代码中发现了另一个错误。在打印有关要遍历的当前项目的信息时,它将在名称的末尾放置一个空字符。这个空字符实际上会覆盖下一个条目的前2个字节,而这恰好是覆盖该条目中“ NextEntryOffset”变量的2个最低有效字节(通常使它等于0),因此只有前2个项是从每个“ NtQueryDirectoryFile”调用中枚举。
我在下面的代码中添加了一个修复程序,可以解决此问题(存储WCHAR,然后将其清除,然后在打印后将其还原。有点麻烦,但这只是一些示例代码,对于正确的实现,请避免使用wprintf可以打印名称,或将其复制到可以安全地将NULL结尾的另一个缓冲区)。
// pipelist.cpp (Windows NT/2000)
//
// This example will show how you can enumerate all named pipes
// active on a system.
//
// (c)2000 Ashot Oganesyan K, SmartLine, Inc
// mailto:ashot@aha.ru, http://www.protect-me.com, http://www.codepile.com
#include <windows.h>
#include <stdio.h>
#define FileDirectoryInformation 1
#define STATUS_NO_MORE_FILES 0x80000006L
typedef struct
{
USHORT Length;
USHORT MaximumLength;
PWSTR Buffer;
} UNICODE_STRING, *PUNICODE_STRING;
typedef struct
{
LONG Status;
ULONG Information;
} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
typedef struct {
ULONG NextEntryOffset;
ULONG FileIndex;
LARGE_INTEGER CreationTime;
LARGE_INTEGER LastAccessTime;
LARGE_INTEGER LastWriteTime;
LARGE_INTEGER ChangeTime;
LARGE_INTEGER EndOfFile;
LARGE_INTEGER AllocationSize;
ULONG FileAttributes;
ULONG FileNameLength;
union {
struct {
WCHAR FileName[1];
} FileDirectoryInformationClass;
struct {
DWORD dwUknown1;
WCHAR FileName[1];
} FileFullDirectoryInformationClass;
struct {
DWORD dwUknown2;
USHORT AltFileNameLen;
WCHAR AltFileName[12];
WCHAR FileName[1];
} FileBothDirectoryInformationClass;
};
} FILE_QUERY_DIRECTORY, *PFILE_QUERY_DIRECTORY;
// ntdll!NtQueryDirectoryFile (NT specific!)
//
// The function searches a directory for a file whose name and attributes
// match those specified in the function call.
//
// NTSYSAPI
// NTSTATUS
// NTAPI
// NtQueryDirectoryFile(
// IN HANDLE FileHandle, // handle to the file
// IN HANDLE EventHandle OPTIONAL,
// IN PIO_APC_ROUTINE ApcRoutine OPTIONAL,
// IN PVOID ApcContext OPTIONAL,
// OUT PIO_STATUS_BLOCK IoStatusBlock,
// OUT PVOID Buffer, // pointer to the buffer to receive the result
// IN ULONG BufferLength, // length of Buffer
// IN FILE_INFORMATION_CLASS InformationClass,// information type
// IN BOOLEAN ReturnByOne, // each call returns info for only one file
// IN PUNICODE_STRING FileTemplate OPTIONAL, // template for search
// IN BOOLEAN Reset // restart search
// );
typedef LONG (WINAPI *PROCNTQDF)( HANDLE,HANDLE,PVOID,PVOID,PIO_STATUS_BLOCK,PVOID,ULONG,
UINT,BOOL,PUNICODE_STRING,BOOL );
PROCNTQDF NtQueryDirectoryFile;
void main(void)
{
LONG ntStatus;
IO_STATUS_BLOCK IoStatus;
HANDLE hPipe;
BOOL bReset = TRUE;
PFILE_QUERY_DIRECTORY DirInfo,
TmpInfo;
NtQueryDirectoryFile = (PROCNTQDF)GetProcAddress(
GetModuleHandle("ntdll"),
"NtQueryDirectoryFile"
);
if (!NtQueryDirectoryFile)
return;
hPipe = CreateFile("\\\\.\\Pipe\\",GENERIC_READ,
FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
NULL,OPEN_EXISTING,0,NULL);
if(hPipe == INVALID_HANDLE_VALUE)
return;
DirInfo = (PFILE_QUERY_DIRECTORY) new BYTE[1024];
printf("Pipe name (Number of instances, Maximum instances)\n\n");
while(1)
{
ntStatus = NtQueryDirectoryFile(hPipe,NULL,NULL,NULL,&IoStatus,DirInfo,1024,
FileDirectoryInformation,FALSE,NULL,bReset);
if (ntStatus!=NO_ERROR)
{
if (ntStatus == STATUS_NO_MORE_FILES)
break;
return;
}
TmpInfo = DirInfo;
while(1)
{
// Store old values before we mangle the buffer
const int endStringAt = TmpInfo->FileNameLength/sizeof(WCHAR);
const WCHAR oldValue = TmpInfo->FileDirectoryInformationClass.FileName[endStringAt];
// Place a null character at the end of the string so wprintf doesn't read past the end
TmpInfo->FileDirectoryInformationClass.FileName[endStringAt] = NULL;
wprintf(L"%s (%d, %d)\n",TmpInfo->FileDirectoryInformationClass.FileName,
TmpInfo->EndOfFile.LowPart,
TmpInfo->AllocationSize.LowPart );
// Restore the buffer to its correct state
TmpInfo->FileDirectoryInformationClass.FileName[endStringAt] = oldValue;
if(TmpInfo->NextEntryOffset==0)
break;
TmpInfo = (PFILE_QUERY_DIRECTORY)((DWORD)TmpInfo+TmpInfo->NextEntryOffset);
}
bReset = FALSE;
}
delete DirInfo;
CloseHandle(hPipe);
}
使用未记录的函数:
// NtQueryDirectoryFile(
// IN HANDLE FileHandle, // 文件句柄
// IN HANDLE EventHandle OPTIONAL,
// IN PIO_APC_ROUTINE ApcRoutine OPTIONAL,
// IN PVOID ApcContext OPTIONAL,
// OUT PIO_STATUS_BLOCK IoStatusBlock,
// OUT PVOID Buffer, / / 指向接收结果的缓冲区的指针
// IN ULONG BufferLength, // 缓冲区的长度
// IN FILE_INFORMATION_CLASS InformationClass,// 信息类型
// IN BOOLEAN ReturnByOne, // 每次调用仅返回一个文件的信息
// IN PUNICODE_STRING FileTemplate OPTIONAL, // 搜索模板
// IN BOOLEAN Reset // 重新开始搜索
// );