【WINAPI】系统获取系统主机域名

概述：windows 操作系统下获取主机域名|获取域名|获取域中域控制器名称

API 1 DsRoleGetPrimaryDomainInformation

主要调用 DsRoleGetPrimaryDomainInformation 这个函数。

// GetDominName.cpp : 获取主机域名
//

#include <Windows.h>
#include <DSRole.h>

#pragma comment(lib, "netapi32.lib")

#include <stdio.h>

int main(int argc, char ** argv)
{
	DSROLE_PRIMARY_DOMAIN_INFO_BASIC * info;
	DWORD dw;

	dw = DsRoleGetPrimaryDomainInformation(NULL,
		DsRolePrimaryDomainInfoBasic,
		(PBYTE *)&info);
	if (dw != ERROR_SUCCESS)
	{
		wprintf(L"DsRoleGetPrimaryDomainInformation: %u\n", dw);
		return dw;
	}

	if (info->DomainNameDns == NULL)
	{
		wprintf(L"DomainNameDns is NULL\n");
	}
	else
	{
		wprintf(L"DomainNameDns: %s\n", info->DomainNameDns);
	}

	system("pause");

	return 0;
}

输出示例：

API 2 LsaQueryInformationPolicy

BOOL kull_m_net_getCurrentDomainInfo(PPOLICY_DNS_DOMAIN_INFO * pDomainInfo)
{
	BOOL status = FALSE;
	LSA_HANDLE hLSA;
	LSA_OBJECT_ATTRIBUTES oaLsa = {0};

	if(NT_SUCCESS(LsaOpenPolicy(NULL, &oaLsa, POLICY_VIEW_LOCAL_INFORMATION, &hLSA)))
	{
		status = NT_SUCCESS(LsaQueryInformationPolicy(hLSA, PolicyDnsDomainInformation, (PVOID *) pDomainInfo));
		LsaClose(hLSA);
	}
	return status;
}

获取域控制器名称

调用 API 为 DsGetDcName

BOOL kull_m_net_getDC(LPCWSTR fullDomainName, DWORD altFlags, LPWSTR * fullDCName)
{
	BOOL status = FALSE;
	DWORD ret, size;
	PDOMAIN_CONTROLLER_INFO cInfo = NULL;
	ret = DsGetDcName(NULL, fullDomainName, NULL, NULL, altFlags | DS_IS_DNS_NAME | DS_RETURN_DNS_NAME, &cInfo);
	if(ret == ERROR_SUCCESS)
	{
		size = (DWORD) (wcslen(cInfo->DomainControllerName + 2) + 1) * sizeof(wchar_t);
		if(*fullDCName = (wchar_t *) LocalAlloc(LPTR, size))
		{
			status = TRUE;
			RtlCopyMemory(*fullDCName, cInfo->DomainControllerName + 2, size);
		}
		NetApiBufferFree(cInfo);
	}
	else PRINT_ERROR(L"DsGetDcName: %u\n", ret);
	return status;
}

// 使用示例
LPWSTR szDc = NULL;
LPCWSTR szDomain = NULL;
if(kull_m_net_getDC("test.com", DS_DIRECTORY_SERVICE_REQUIRED, &szTmpDc))
	szDc = szTmpDc;