425 lines
14 KiB
C++
425 lines
14 KiB
C++
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//--------------------------------------------------------------------
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// DcInfo - implementation
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// Copyright (C) Microsoft Corporation, 1999
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//
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// Created by: Louis Thomas (louisth), 7-8-99
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//
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// Gather information about the DCs in a domain
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#include "pch.h" // precompiled headers
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#include "DcInfo.h"
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//####################################################################
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// module private functions
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//--------------------------------------------------------------------
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// Get a list of DCs in this domain from the DS on an up DC.
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MODULEPRIVATE HRESULT GetDcListFromDs(const WCHAR * wszDomainName, DcInfo ** prgDcs, unsigned int * pnDcs)
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{
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HRESULT hr;
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NET_API_STATUS dwNetStatus;
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DWORD dwDcCount;
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unsigned int nIndex;
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unsigned int nDcs;
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unsigned int nDcIndex;
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// varaibles that must be cleaned up
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DOMAIN_CONTROLLER_INFOW * pDcInfo=NULL;
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HANDLE hDs=NULL;
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DS_DOMAIN_CONTROLLER_INFO_1W * rgDsDcInfo=NULL;
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DcInfo * rgDcs=NULL;
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// initialize out variables
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*prgDcs=NULL;
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*pnDcs=0;
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// Get a DC to seed the algorithm with
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dwNetStatus=DsGetDcName(
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NULL, // computer name
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wszDomainName, // domain name
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NULL, // domain guid
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NULL, // site name
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DS_DIRECTORY_SERVICE_PREFERRED, // flags
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&pDcInfo); // DC info
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if (NO_ERROR!=dwNetStatus) {
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hr=HRESULT_FROM_WIN32(dwNetStatus);
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_JumpError(hr, error, "DsGetDcName");
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}
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if (0==(pDcInfo->Flags&DS_DS_FLAG)) {
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hr=HRESULT_FROM_WIN32(ERROR_DS_DST_DOMAIN_NOT_NATIVE); // not an NT5 domain.
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_JumpError(hr, error, "DsGetDcName");
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}
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// Bind to the target DS
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dwNetStatus=DsBind(
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pDcInfo->DomainControllerName, // DC Address
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NULL, // DNS domain name
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&hDs ); // DS handle
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if (NO_ERROR!=dwNetStatus) {
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hr=HRESULT_FROM_WIN32(dwNetStatus);
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_JumpError(hr, error, "DsBind");
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}
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// Get the list of DCs from the target DS.
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dwNetStatus=DsGetDomainControllerInfo(
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hDs, // DS handle
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pDcInfo->DomainName, // domain name
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1, // Info level
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&dwDcCount, // number of names returned
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(void **)&rgDsDcInfo); // array of names
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if (NO_ERROR!=dwNetStatus ) {
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hr=HRESULT_FROM_WIN32(dwNetStatus);
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_JumpError(hr, error, "DsGetDomainControllerInfo");
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}
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// figure out how many DCs there are with DNS names
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nDcs=0;
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for (nIndex=0; nIndex<dwDcCount; nIndex++) {
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if (NULL!=rgDsDcInfo[nIndex].DnsHostName) {
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nDcs++;
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}
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}
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if (nDcs<dwDcCount) {
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DebugWPrintf2(L"Found %u non-DNS DCs out of %u, which will be ignored.\n", dwDcCount-nDcs, dwDcCount);
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}
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if (0==nDcs) {
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hr=HRESULT_FROM_WIN32(ERROR_DOMAIN_CONTROLLER_NOT_FOUND); // no usable DCs
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_JumpError(hr, error, "Search rgDsDcInfo for usable DCs");
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}
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// allocate the list
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rgDcs=(DcInfo *)LocalAlloc(LPTR, sizeof(DcInfo)*nDcs);
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_JumpIfOutOfMemory(hr, error, rgDcs);
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// copy the names into it
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nDcIndex=0;
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for (nIndex=0; nIndex<dwDcCount; nIndex++) {
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if (NULL!=rgDsDcInfo[nIndex].DnsHostName) {
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// allocate and copy name
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rgDcs[nDcIndex].wszDnsName=(WCHAR *)LocalAlloc(LPTR, sizeof(WCHAR)*(wcslen(rgDsDcInfo[nIndex].DnsHostName)+1));
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_JumpIfOutOfMemory(hr, error, rgDcs[nDcIndex].wszDnsName);
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wcscpy(rgDcs[nDcIndex].wszDnsName, rgDsDcInfo[nIndex].DnsHostName);
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//_Verify(NULL!=rgDsDcInfo[nIndex].NetbiosName, hr, error);
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//rgDcs[nDcIndex].wszDnsName=(WCHAR *)LocalAlloc(LPTR, sizeof(WCHAR)*(wcslen(rgDsDcInfo[nIndex].NetbiosName)+1));
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//_JumpIfOutOfMemory(hr, error, rgDcs[nDcIndex].wszDnsName);
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//wcscpy(rgDcs[nDcIndex].wszDnsName, rgDsDcInfo[nIndex].NetbiosName);
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// copy PDCness
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rgDcs[nDcIndex].bIsPdc=rgDsDcInfo[nIndex].fIsPdc?true:false;
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nDcIndex++;
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}
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}
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// move the data to the out parameters
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*prgDcs=rgDcs;
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rgDcs=NULL;
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*pnDcs=nDcs;
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hr=S_OK;
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error:
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if (NULL!=rgDcs) {
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for (nIndex=0; nIndex<nDcs; nIndex++) {
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FreeDcInfo(&rgDcs[nIndex]);
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}
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LocalFree(rgDcs);
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}
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if (NULL!=rgDsDcInfo ) {
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DsFreeDomainControllerInfo(1, dwDcCount, rgDsDcInfo);
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}
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if (NULL!=hDs) {
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DsUnBind(&hDs);
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}
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if (NULL!=pDcInfo) {
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NetApiBufferFree(pDcInfo);
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}
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return hr;
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}
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//--------------------------------------------------------------------
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MODULEPRIVATE HRESULT GetDcListFromNetlogon(const WCHAR * wszDomainName, DcInfo ** prgDcs, unsigned int * pnDcs)
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{
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HRESULT hr;
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NET_API_STATUS dwNetStatus;
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DWORD dwEntriesRead;
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DWORD dwTotalEntries;
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unsigned int nIndex;
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unsigned int nDcIndex;
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unsigned int nDcs;
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// varaibles that must be cleaned up
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DcInfo * rgDcs=NULL;
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SERVER_INFO_101 * rgsiServerInfo=NULL;
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// initialize out variables
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*prgDcs=NULL;
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*pnDcs=0;
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// enumerate all PDC and BDCs
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dwNetStatus=NetServerEnum(
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NULL, // server to query
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101, // info level
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(BYTE **)&rgsiServerInfo, // output buffer
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MAX_PREFERRED_LENGTH, // desired return buf size
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&dwEntriesRead, // entries in output buffer
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&dwTotalEntries, // total number of entries available
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SV_TYPE_DOMAIN_CTRL | SV_TYPE_DOMAIN_BAKCTRL, // server type to find
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wszDomainName, // domain to search
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NULL); // reserved
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if (NO_ERROR!=dwNetStatus ) {
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hr=HRESULT_FROM_WIN32(dwNetStatus);
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_JumpError(hr, error, "NetServerEnum");
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}
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// count how many NT 5 servers there are
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nDcs=0;
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for (nIndex=0; nIndex<dwEntriesRead; nIndex++) {
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if (0!=(rgsiServerInfo[nIndex].sv101_type&SV_TYPE_NT)
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&& rgsiServerInfo[nIndex].sv101_version_major>=5) {
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nDcs++;
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}
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}
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if (nDcs<dwEntriesRead) {
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DebugWPrintf2(L"Found %u non-NT5 DCs out of %u, which will be ignored.\n", dwEntriesRead-nDcs, dwEntriesRead);
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}
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if (0==nDcs) {
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hr=HRESULT_FROM_WIN32(ERROR_DOMAIN_CONTROLLER_NOT_FOUND); // no usable DCs
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_JumpError(hr, error, "Search rgsiServerInfo for usable DCs");
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}
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// allocate the list
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rgDcs=(DcInfo *)LocalAlloc(LPTR, sizeof(DcInfo)*nDcs);
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_JumpIfOutOfMemory(hr, error, rgDcs);
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// copy the names into it
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nDcIndex=0;
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for (nIndex=0; nIndex<dwEntriesRead; nIndex++) {
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if (0!=(rgsiServerInfo[nIndex].sv101_type&SV_TYPE_NT)
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&& rgsiServerInfo[nIndex].sv101_version_major>=5) {
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// allocate and copy name
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rgDcs[nDcIndex].wszDnsName=(WCHAR *)LocalAlloc(LPTR, sizeof(WCHAR)*(wcslen(rgsiServerInfo[nIndex].sv101_name)+1));
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_JumpIfOutOfMemory(hr, error, rgDcs[nDcIndex].wszDnsName);
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wcscpy(rgDcs[nDcIndex].wszDnsName, rgsiServerInfo[nIndex].sv101_name);
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// copy PDCness
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rgDcs[nDcIndex].bIsPdc=(rgsiServerInfo[nIndex].sv101_type&SV_TYPE_DOMAIN_CTRL)?true:false;
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nDcIndex++;
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}
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}
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// move the data to the out parameters
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*prgDcs=rgDcs;
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rgDcs=NULL;
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*pnDcs=nDcs;
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hr=S_OK;
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error:
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if (NULL!=rgDcs) {
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for (nIndex=0; nIndex<nDcs; nIndex++) {
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FreeDcInfo(&rgDcs[nIndex]);
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}
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LocalFree(rgDcs);
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}
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if (NULL!=rgsiServerInfo) {
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NetApiBufferFree(rgsiServerInfo);
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}
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return hr;
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}
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//--------------------------------------------------------------------
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MODULEPRIVATE HRESULT FillInIpAddresses(DcInfo * pdi) {
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HRESULT hr;
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DWORD dwDataLen;
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unsigned int nIndex;
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// pointers that must be cleaned up
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HANDLE hSearch=INVALID_HANDLE_VALUE;
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WSAQUERYSETW * pqsResult=NULL;
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in_addr * rgiaLocalIpAddresses=NULL;
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in_addr * rgiaRemoteIpAddresses=NULL;
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DebugWPrintf1(L"Looking up server \"%s\":\n", pdi->wszDnsName);
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// initialize the search
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AFPROTOCOLS apInetUdp={AF_INET, IPPROTO_UDP};
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GUID guidNtp=SVCID_NTP_UDP;
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WSAQUERYSETW qsSearch;
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ZeroMemory(&qsSearch, sizeof(qsSearch));
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qsSearch.dwSize=sizeof(qsSearch);
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qsSearch.lpszServiceInstanceName=const_cast<WCHAR *>(pdi->wszDnsName);
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qsSearch.lpServiceClassId=&guidNtp;
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qsSearch.dwNameSpace=NS_ALL;
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qsSearch.dwNumberOfProtocols=1;
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qsSearch.lpafpProtocols=&apInetUdp;
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// begin the search
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if (SOCKET_ERROR==WSALookupServiceBegin(&qsSearch, LUP_RETURN_ADDR/*flags*/, &hSearch)) {
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hr=HRESULT_FROM_WIN32(WSAGetLastError());
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_JumpError(hr, error, "WSALookupServiceBegin");
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}
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// get the buffer size for the first result set
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//dwDataLen=1;
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//_Verify(SOCKET_ERROR==WSALookupServiceNext(hSearch, LUP_RETURN_ADDR/*flags*/, &dwDataLen, &qsSearch), hr, error);
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//hr=WSAGetLastError();
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//if (WSAEFAULT!=hr) {
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// hr=HRESULT_FROM_WIN32(hr);
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// _JumpError(hr, error, "WSALookupServiceNext(1)");
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//}
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dwDataLen=5*1024;
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// allocate the buffer
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pqsResult=(WSAQUERYSETW *)LocalAlloc(LPTR, dwDataLen);
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_JumpIfOutOfMemory(hr, error, pqsResult);
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// retrieve the result set
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if (SOCKET_ERROR==WSALookupServiceNext(hSearch, LUP_RETURN_ADDR/*flags*/, &dwDataLen, pqsResult)) {
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hr=HRESULT_FROM_WIN32(WSAGetLastError());
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_JumpError(hr, error, "WSALookupServiceNext(2)");
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}
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_Verify(0!=pqsResult->dwNumberOfCsAddrs, hr, error) ;
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// allocate room for the IP addresses
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rgiaLocalIpAddresses=(in_addr *)LocalAlloc(LPTR, sizeof(in_addr)*pqsResult->dwNumberOfCsAddrs);
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_JumpIfOutOfMemory(hr, error, rgiaLocalIpAddresses);
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rgiaRemoteIpAddresses=(in_addr *)LocalAlloc(LPTR, sizeof(in_addr)*pqsResult->dwNumberOfCsAddrs);
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_JumpIfOutOfMemory(hr, error, rgiaRemoteIpAddresses);
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// copy the IP addresses
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for (nIndex=0; nIndex<pqsResult->dwNumberOfCsAddrs; nIndex++) {
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// copy local
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_Verify(sizeof(sockaddr)==pqsResult->lpcsaBuffer[nIndex].LocalAddr.iSockaddrLength, hr, error);
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_Verify(AF_INET==pqsResult->lpcsaBuffer[nIndex].LocalAddr.lpSockaddr->sa_family, hr, error);
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rgiaLocalIpAddresses[nIndex].S_un.S_addr=((sockaddr_in *)(pqsResult->lpcsaBuffer[nIndex].LocalAddr.lpSockaddr))->sin_addr.S_un.S_addr;
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// copy remote
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_Verify(sizeof(sockaddr)==pqsResult->lpcsaBuffer[nIndex].RemoteAddr.iSockaddrLength, hr, error);
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_Verify(AF_INET==pqsResult->lpcsaBuffer[nIndex].RemoteAddr.lpSockaddr->sa_family, hr, error);
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rgiaRemoteIpAddresses[nIndex].S_un.S_addr=((sockaddr_in *)(pqsResult->lpcsaBuffer[nIndex].RemoteAddr.lpSockaddr))->sin_addr.S_un.S_addr;
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}
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// move the data to the out parameters
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pdi->nIpAddresses=pqsResult->dwNumberOfCsAddrs;
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pdi->rgiaLocalIpAddresses=rgiaLocalIpAddresses;
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rgiaLocalIpAddresses=NULL;
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pdi->rgiaRemoteIpAddresses=rgiaRemoteIpAddresses;
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rgiaRemoteIpAddresses=NULL;
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hr=S_OK;
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error:
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if (NULL!=rgiaLocalIpAddresses) {
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LocalFree(rgiaLocalIpAddresses);
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}
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if (NULL!=rgiaRemoteIpAddresses) {
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LocalFree(rgiaRemoteIpAddresses);
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}
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if (NULL!=pqsResult) {
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LocalFree(pqsResult);
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}
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if (INVALID_HANDLE_VALUE!=hSearch) {
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if (SOCKET_ERROR==WSALookupServiceEnd(hSearch)) {
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HRESULT hr2=HRESULT_FROM_WIN32(WSAGetLastError());
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_IgnoreError(hr2, "WSALookupServiceEnd");
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}
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}
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return hr;
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}
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//####################################################################
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// Globals
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//--------------------------------------------------------------------
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void FreeDcInfo(DcInfo * pdci) {
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if (NULL!=pdci->wszDnsName) {
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||
|
|
LocalFree(pdci->wszDnsName);
|
||
|
|
}
|
||
|
|
if (NULL!=pdci->rgiaLocalIpAddresses) {
|
||
|
|
LocalFree(pdci->rgiaLocalIpAddresses);
|
||
|
|
}
|
||
|
|
if (NULL!=pdci->rgiaRemoteIpAddresses) {
|
||
|
|
LocalFree(pdci->rgiaRemoteIpAddresses);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
// Get a list of DCs in this domain
|
||
|
|
HRESULT GetDcList(const WCHAR * wszDomainName, bool bGetIps, DcInfo ** prgDcs, unsigned int * pnDcs)
|
||
|
|
{
|
||
|
|
HRESULT hr;
|
||
|
|
unsigned int nDcs;
|
||
|
|
unsigned int nIndex;
|
||
|
|
|
||
|
|
// varaibles that must be cleaned up
|
||
|
|
DcInfo * rgDcs=NULL;
|
||
|
|
|
||
|
|
// initialize out variables
|
||
|
|
*prgDcs=NULL;
|
||
|
|
*pnDcs=0;
|
||
|
|
|
||
|
|
hr=GetDcListFromDs(wszDomainName, &rgDcs, &nDcs);
|
||
|
|
if (FAILED(hr)) {
|
||
|
|
_IgnoreError(hr, "GetDcListFromDs");
|
||
|
|
hr=GetDcListFromNetlogon(wszDomainName, &rgDcs, &nDcs);
|
||
|
|
_JumpIfError(hr, error, "GetDcListFromNetlogon");
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bGetIps) {
|
||
|
|
// get the info about the DCs
|
||
|
|
for (nIndex=0; nIndex<nDcs; nIndex++) {
|
||
|
|
hr=FillInIpAddresses(&rgDcs[nIndex]);
|
||
|
|
if (FAILED(hr)) {
|
||
|
|
_IgnoreError(hr, "FillInIpAddresses");
|
||
|
|
if (nIndex!=nDcs-1) {
|
||
|
|
// swap it with the last one
|
||
|
|
WCHAR * wszDnsName=rgDcs[nIndex].wszDnsName;
|
||
|
|
rgDcs[nIndex].wszDnsName=rgDcs[nDcs-1].wszDnsName;
|
||
|
|
rgDcs[nDcs-1].wszDnsName=wszDnsName;
|
||
|
|
|
||
|
|
in_addr * rgiaLocalIpAddresses=rgDcs[nIndex].rgiaLocalIpAddresses;
|
||
|
|
rgDcs[nIndex].rgiaLocalIpAddresses=rgDcs[nDcs-1].rgiaLocalIpAddresses;
|
||
|
|
rgDcs[nDcs-1].rgiaLocalIpAddresses=rgiaLocalIpAddresses;
|
||
|
|
|
||
|
|
in_addr * rgiaRemoteIpAddresses=rgDcs[nIndex].rgiaRemoteIpAddresses;
|
||
|
|
rgDcs[nIndex].rgiaRemoteIpAddresses=rgDcs[nDcs-1].rgiaRemoteIpAddresses;
|
||
|
|
rgDcs[nDcs-1].rgiaRemoteIpAddresses=rgiaRemoteIpAddresses;
|
||
|
|
|
||
|
|
// non-pointers can just be copied
|
||
|
|
rgDcs[nIndex].nIpAddresses=rgDcs[nDcs-1].nIpAddresses;
|
||
|
|
rgDcs[nIndex].bIsPdc=rgDcs[nDcs-1].bIsPdc;
|
||
|
|
rgDcs[nIndex].bIsGoodTimeSource=rgDcs[nDcs-1].bIsGoodTimeSource;
|
||
|
|
}
|
||
|
|
DebugWPrintf1(L"Dropping '%s' because we cannot get an IP address.\n", rgDcs[nDcs-1].wszDnsName);
|
||
|
|
nDcs--;
|
||
|
|
nIndex--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (0==nDcs) {
|
||
|
|
hr=HRESULT_FROM_WIN32(ERROR_DOMAIN_CONTROLLER_NOT_FOUND); // no usable DCs
|
||
|
|
_JumpError(hr, error, "Getting IP address for at least one DC");
|
||
|
|
}
|
||
|
|
|
||
|
|
// move the data to the out parameters
|
||
|
|
*prgDcs=rgDcs;
|
||
|
|
rgDcs=NULL;
|
||
|
|
*pnDcs=nDcs;
|
||
|
|
|
||
|
|
hr=S_OK;
|
||
|
|
|
||
|
|
error:
|
||
|
|
if (NULL!=rgDcs) {
|
||
|
|
for (nIndex=0; nIndex<nDcs; nIndex++) {
|
||
|
|
FreeDcInfo(&rgDcs[nIndex]);
|
||
|
|
}
|
||
|
|
LocalFree(rgDcs);
|
||
|
|
}
|
||
|
|
return hr;
|
||
|
|
}
|