我目前正在使用Netapi32访问Windows Netapi32.lib，当前正在使用c++访问api。我在检索计算机名称时遇到麻烦，当前是NetFileEnum结构here上的FILE_INFO_3 here。在文档中说:
现在，运行此脚本的网络确实具有共享级别的安全性，但我不确定如何列出计算机名称。
相关代码
图书馆包括:
#pragma comment(lib, "Netapi32.lib")
#include <stdio.h>
#include <assert.h>
#include <windows.h>
#include <lm.h>
启动结构:
fstatus在我的代码中定义为NET_API_STATUS fStatus，它是I / O结构。文档here如果
fstatus成功，则返回值NERR_Success。如果函数失败，则返回值可以是以下错误代码之一。
ERROR_ACCESS_DENIED用户无权访问所请求的信息。
ERROR_INVALID_LEVEL为level参数指定的值为无效。
ERROR_INVALID_PARAMETER指定的参数无效。 ERROR_MORE_DATA More条目可用。指定足够大的缓冲区以接收所有条目。 更多here
为了解决这个问题，我使用
if ((fStatus == NERR_Success) || (fStatus == ERROR_MORE_DATA))找不到用户名。
fStatus = NetFileEnum(
flServerName, //Pointer to a string that specifies the DNS or NetBIOS name of the remote server on which the function is to execute. If this parameter is NULL, the local computer is used.
flBasePath, //Pointer to a string that specifies a qualifier for the returned information. If this parameter is NULL, all open resources are enumerated.
flUserName, //Pointer to a string that specifies the name of the user or the name of the connection.
dfLevel, //Pointer to a string that specifies the name of the user or the name of the connection. Can be either 2 or 3, I am using 3
(LPBYTE*)&pFile, //Pointer to the address of the buffer that receives the information. The format of this data depends on the value of the level parameter.
fwPrefMaxLen, //pecifies the preferred maximum length of returned data, in bytes.
&fwEntriesRead, //Pointer to a value that receives the count of elements actually enumerated.
&fwTotalEntries, //Pointer to a value that receives the total number of entries that could have been enumerated from the current resume position.
&fwResumeHandle); //Pointer to a value that contains a resume handle which is used to continue an existing file search.
NET_API_STATUS NetFileEnum(
_In_ LMSTR servername,
_In_ LMSTR basepath,
_In_ LMSTR username,
_In_ DWORD level,
_Out_ LPBYTE *bufptr,
_In_ DWORD prefmaxlen,
_Out_ LPDWORD entriesread,
_Out_ LPDWORD totalentries,
_Inout_ PDWORD_PTR resume_handle
);
以上的RAW值:
NET_API_STATUS fStatus;
LPFILE_INFO_3 pFile = NULL;
LPFILE_INFO_3 pTmpFile;
DWORD dfLevel = 3;
LPTSTR flServerName = NULL;
LPTSTR flUserName = NULL;
LPTSTR flBasePath = NULL;
DWORD fwPrefMaxLen = MAX_PREFERRED_LENGTH;
DWORD fwEntriesRead = 0;
DWORD fwTotalEntries = 0;
DWORD fwResumeHandle = 0;
pTmpfile是3级(文档here)缓冲区对象，该缓冲区以这种格式返回数据，
typedef struct _FILE_INFO_3 {
DWORD fi3_id;
DWORD fi3_permissions;
DWORD fi3_num_locks;
LMSTR fi3_pathname;
LMSTR fi3_username;
} FILE_INFO_3, *PFILE_INFO_3, *LPFILE_INFO_3;
检索数据:
printf("\n\tComputer: %S\n", pTmpFile->fi3_username); //how do I retrieve computer name???
printf("\n\tid: %D\n", pTmpFile->fi3_id);
printf("\n\tpath: %S\n", pTmpFile->fi3_pathname);
**重要的是要注意，我已经使用vbnet进行了尝试并且可以正常工作，但是以某种方式无法弄清楚它如何在c++上完成。
完整的测试程序:
#ifndef UNICODE
#define UNICODE
#endif
//Initialize the NetAPI Library
#pragma comment(lib, "Netapi32.lib")
#include <stdio.h>
#include <assert.h>
#include <windows.h>
#include <lm.h>
int wmain(int argc, wchar_t *argv[])
{
//NetFile Enum, using 3 Level.
NET_API_STATUS fStatus;
LPFILE_INFO_3 pFile = NULL;
LPFILE_INFO_3 pTmpFile;
DWORD dfLevel = 3;
LPTSTR flServerName = NULL;
LPTSTR flUserName = NULL;
LPTSTR flBasePath = NULL;
DWORD fwPrefMaxLen = MAX_PREFERRED_LENGTH;
DWORD fwEntriesRead = 0;
DWORD fwTotalEntries = 0;
DWORD fwResumeHandle = 0;
DWORD fi;
//
// Check command line arguments.
// Dont need this currently.
//
do
{
fStatus = NetFileEnum(flServerName,
flBasePath,
flUserName,
dfLevel,
(LPBYTE*)&pFile,
fwPrefMaxLen,
&fwEntriesRead,
&fwTotalEntries,
&fwResumeHandle);
if ((fStatus == NERR_Success) || (fStatus == ERROR_MORE_DATA))
{
if ((pTmpFile = pFile) != NULL)
{
for (fi=0; fi < fwEntriesRead; fi++)
{
assert(pTmpFile != NULL);
if (pTmpFile == NULL)
{
fprintf(stderr, "An access violation has occurred\n");
break;
}
printf("\n\tComputer: %S", pTmpFile->fi3_username);
printf("\n\tid: %d", pTmpFile->fi3_id);
printf("\n\tpath: %s", pTmpFile->fi3_pathname);
printf("\n\tLocks: %d\n", pTmpFile->fi3_num_locks);
pTmpFile++;
fwTotalEntries++;
}
}
}
else
fprintf(stderr, "A system error has occurred: %d\n", fStatus);
//
// Free the allocated memory.
//
if (pFile != NULL)
{
NetApiBufferFree(pFile);
pFile = NULL;
}
}
//
// Continue to call NetFilEnum while
// there are more entries.
//
while (fStatus == ERROR_MORE_DATA);
if (pFile != NULL)
NetApiBufferFree(pFile);
return 0;
}
输出:
从构建:
1>------ Build started: Project: Perfmon, Configuration: Release Win32 ------
1>Compiling...
1>file_enumerate.cpp
1>Linking...
1>Generating code
1>Finished generating code
1>Embedding manifest...
1>Build log was saved at "file://...."
1>Perfmon - 0 error(s), 0 warning(s)
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
跑:
Computer: User1 //prints only username, not computername (in our system, each user has the same username)
id: 1005687
path: c:\fips\library
Computer: User2 //prints only username, not computername (in our system, each user has the same username)
id: 1005689
path: c:\fips\library\util
最佳答案
如果有人对解决方案感到疑惑，我想通了。要查询与Computer相关的文件数，而不仅仅是User，必须使用NetFileEnum函数here文档。 NetFileEnum语法如下所示，
NET_API_STATUS NetFileEnum(
_In_ LMSTR servername,
_In_ LMSTR basepath,
_In_ LMSTR username,
_In_ DWORD level,
_Out_ LPBYTE *bufptr,
_In_ DWORD prefmaxlen,
_Out_ LPDWORD entriesread,
_Out_ LPDWORD totalentries,
_Inout_ PDWORD_PTR resume_handle
);
您必须将
Computer Name作为LMSTR username传递(您可以通过查询NetSessionEnum(502)来检索计算机名称，这将返回网络中的所有计算机名称，文档here)，并且查询基于DWORD level返回文件详细信息，FILE_INFO_3文档here和FILE_INFO_2文档here。关于c++ - Windows Netapi32，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15888794/