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[DNSRSLVR][DNSAPI] Enable the DNS resolver cache

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- Fix the IDL file to return DNS records properly
- Reroute the DNS query call path: DNSQuery->R_ResolverQuery->Query_Main

DNS records get cached and 'ipconfig /flushdns' works as expected.

CORE-12159
This commit is contained in:
Eric Kohl 2019-11-10 15:28:42 +01:00
parent fc6e4ed576
commit 305035be7d
6 changed files with 80 additions and 41 deletions
Download patch file Download diff file Expand all files Collapse all files

1
base/services/dnsrslvr/precomp.h
View file

@ -11,6 +11,7 @@
#include <winbase.h>
#include <winsvc.h>
#include <windns.h>
#include <windns_undoc.h>
#include <ndk/rtlfuncs.h>
#include <ndk/obfuncs.h>

64
base/services/dnsrslvr/rpcserver.c
View file

@ -45,6 +45,8 @@ DWORD
R_ResolverFlushCache(
DNSRSLVR_HANDLE pwszServerName)
{
DPRINT("R_ResolverFlushCache()\n");
// FIXME Should store (and flush) entries by server handle
DnsIntCacheFlush();
return 0;
@ -52,65 +54,61 @@ R_ResolverFlushCache(
DWORD
R_ResolverQuery(
DNSRSLVR_HANDLE pwszServerName,
LPCWSTR pwsName,
DNSRSLVR_HANDLE pszServerName,
LPCWSTR pszName,
WORD wType,
DWORD Flags,
DWORD dwFlags,
DWORD *dwRecords,
DNS_RECORDW **ppResultRecords)
{
#if 0
DNS_QUERY_REQUEST QueryRequest = { 0 };
DNS_QUERY_RESULT QueryResults = { 0 };
#endif
DNS_STATUS Status;
PDNS_RECORDW Record;
PDNS_RECORDW Record;
DNS_STATUS Status;
DPRINT1("R_ResolverQuery %p %p %x %lx %p %p\n",
pwszServerName, pwsName, wType, Flags, dwRecords, ppResultRecords);
DPRINT("R_ResolverQuery(%S %S %x %lx %p %p)\n",
pszServerName, pszName, wType, dwFlags, dwRecords, ppResultRecords);
if (!pwszServerName || !pwsName || !wType || !ppResultRecords)
if (pszName == NULL || wType == 0 || ppResultRecords == NULL)
return ERROR_INVALID_PARAMETER;
// FIXME Should lookup entries by server handle
if (DnsIntCacheGetEntryFromName(pwsName, ppResultRecords))
if ((dwFlags & DNS_QUERY_WIRE_ONLY) != 0 && (dwFlags & DNS_QUERY_NO_WIRE_QUERY) != 0)
return ERROR_INVALID_PARAMETER;
if (DnsIntCacheGetEntryFromName(pszName, ppResultRecords))
{
DPRINT("DNS cache query successful!\n");
Status = ERROR_SUCCESS;
}
else
{
#if 0
QueryRequest.Version = DNS_QUERY_REQUEST_VERSION1;
QueryRequest.QueryType = wType;
QueryRequest.QueryName = pwsName;
QueryRequest.QueryOptions = Flags;
QueryResults.Version = DNS_QUERY_REQUEST_VERSION1;
Status = DnsQueryEx(&QueryRequest, &QueryResults, NULL);
DPRINT("DNS query!\n");
Status = Query_Main(pszName,
wType,
dwFlags,
ppResultRecords);
if (Status == ERROR_SUCCESS)
{
// FIXME Should store (and flush) entries by server handle
DnsIntCacheAddEntry(QueryResults.pQueryRecords);
*ppResultRecords = QueryResults.pQueryRecords;
DPRINT("DNS query successful!\n");
DnsIntCacheAddEntry(*ppResultRecords);
}
#endif
}
if (dwRecords)
{
*dwRecords = 0;
if (Status == ERROR_SUCCESS)
{
Record = *ppResultRecords;
while (Record)
if (Status == ERROR_SUCCESS)
{
if (dwRecords)
Record = *ppResultRecords;
while (Record)
{
DPRINT("Record: %S\n", Record->pName);
(*dwRecords)++;
Record = Record->pNext;
Record = Record->pNext;
}
}
}
DPRINT1("R_ResolverQuery result %ld %ld\n", Status, *dwRecords);
DPRINT("R_ResolverQuery result %ld %ld\n", Status, *dwRecords);
return Status;
}