DWORD
DNSUpdateCreateUpdateRequest(
PDNS_UPDATE_REQUEST * ppDNSRequest
)
{
DWORD dwError = 0;
PDNS_UPDATE_REQUEST pDNSRequest = NULL;
dwError = DNSAllocateMemory(
sizeof(DNS_UPDATE_REQUEST),
(PVOID *)&pDNSRequest);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSGenerateIdentifier(&pDNSRequest->wIdentification);
BAIL_ON_LWDNS_ERROR(dwError);
pDNSRequest->wParameter = 0x2800;
*ppDNSRequest = pDNSRequest;
cleanup:
return dwError;
error:
if (pDNSRequest){
DNSUpdateFreeRequest(pDNSRequest);
}
*ppDNSRequest = NULL;
goto cleanup;
}
DWORD
DNSSendSecureUpdate(
HANDLE hDNSServer,
PCtxtHandle pGSSContext,
PCSTR pszKeyName,
PCSTR pszZoneName,
PCSTR pszHostnameFQDN,
DWORD dwNumAddrs,
PSOCKADDR_IN pAddrArray,
PDNS_UPDATE_RESPONSE * ppDNSUpdateResponse
)
{
DWORD dwError = 0;
PDNS_UPDATE_REQUEST pDNSUpdateRequest = NULL;
PDNS_UPDATE_RESPONSE pDNSUpdateResponse = NULL;
LWDNS_LOG_INFO("Attempting DNS Update (secure)");
dwError = DNSUpdateCreateARUpdateRequest(
&pDNSUpdateRequest,
pszZoneName,
pszHostnameFQDN,
dwNumAddrs,
pAddrArray);
BAIL_ON_LWDNS_ERROR(dwError);
//
// Now Sign the Record
//
dwError = DNSUpdateGenerateSignature(
pGSSContext,
pDNSUpdateRequest,
pszKeyName);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateSendUpdateRequest2(
hDNSServer,
pDNSUpdateRequest);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateReceiveUpdateResponse(
hDNSServer,
&pDNSUpdateResponse);
BAIL_ON_LWDNS_ERROR(dwError);
*ppDNSUpdateResponse = pDNSUpdateResponse;
LWDNS_LOG_INFO("DNS Update (secure) succeeded");
cleanup:
if (pDNSUpdateRequest) {
DNSUpdateFreeRequest(pDNSUpdateRequest);
}
return(dwError);
error:
if (pDNSUpdateResponse) {
DNSUpdateFreeResponse(pDNSUpdateResponse);
}
*ppDNSUpdateResponse = NULL;
LWDNS_LOG_ERROR("DNS Update (secure) failed. [Error code:%d]", dwError);
goto cleanup;
}
DWORD
DNSSendUpdate(
HANDLE hDNSServer,
PCSTR pszZoneName,
PCSTR pszHostnameFQDN,
DWORD dwNumAddrs,
PSOCKADDR_IN pAddrArray,
PDNS_UPDATE_RESPONSE * ppDNSUpdateResponse
)
{
DWORD dwError = 0;
PDNS_UPDATE_REQUEST pDNSUpdateRequest = NULL;
PDNS_UPDATE_RESPONSE pDNSUpdateResponse = NULL;
PDNS_ZONE_RECORD pDNSZoneRecord = NULL;
PDNS_RR_RECORD pDNSARecord = NULL;
dwError = DNSUpdateCreateARUpdateRequest(
&pDNSUpdateRequest,
pszZoneName,
pszHostnameFQDN,
dwNumAddrs,
pAddrArray);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateSendUpdateRequest2(
hDNSServer,
pDNSUpdateRequest);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateReceiveUpdateResponse(
hDNSServer,
&pDNSUpdateResponse);
BAIL_ON_LWDNS_ERROR(dwError);
*ppDNSUpdateResponse = pDNSUpdateResponse;
cleanup:
if (pDNSZoneRecord) {
DNSFreeZoneRecord(pDNSZoneRecord);
}
if (pDNSARecord)
{
DNSFreeRecord(pDNSARecord);
}
if (pDNSUpdateRequest) {
DNSUpdateFreeRequest(pDNSUpdateRequest);
}
return(dwError);
error:
*ppDNSUpdateResponse = NULL;
if (pDNSUpdateResponse) {
DNSUpdateFreeResponse(pDNSUpdateResponse);
}
LWDNS_LOG_ERROR("DNS Update (in-secure) failed. [Error code:%d]", dwError);
goto cleanup;
}
DWORD
DNSUpdateCreateARUpdateRequest(
PDNS_UPDATE_REQUEST* ppDNSUpdateRequest,
PCSTR pszZoneName,
PCSTR pszHostnameFQDN,
DWORD dwNumAddrs,
PSOCKADDR_IN pAddrArray
)
{
DWORD dwError = 0;
PDNS_UPDATE_REQUEST pDNSUpdateRequest = NULL;
PDNS_ZONE_RECORD pDNSZoneRecord = NULL;
PDNS_RR_RECORD pDNSPRRecord = NULL;
PDNS_RR_RECORD pDNSARecord = NULL;
DWORD iAddr = 0;
// Allocate pDNSUpdateRequest and fill in wIdentification and wParameter
dwError = DNSUpdateCreateUpdateRequest(
&pDNSUpdateRequest);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSCreateZoneRecord(
pszZoneName,
&pDNSZoneRecord);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateAddZoneSection(
pDNSUpdateRequest,
pDNSZoneRecord);
BAIL_ON_LWDNS_ERROR(dwError);
pDNSZoneRecord = NULL;
// Creates a prerequisite saying that the fqdn does not already exist as a
// CNAME. The prequisite will pass if the record exists as another type
// (such as an A record).
// This prerequisite stops the tool from replacing a CNAME with an A
// record.
dwError = DNSCreateNameNotInUseRecord(
pszHostnameFQDN,
&pDNSPRRecord);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateAddPRSection(
pDNSUpdateRequest,
pDNSPRRecord);
BAIL_ON_LWDNS_ERROR(dwError);
pDNSPRRecord = NULL;
// Delete all A records associated with the fqdn.
// This deletes IP addresses that do not belong to the computer.
dwError = DNSCreateDeleteRecord(
pszHostnameFQDN,
DNS_CLASS_ANY,
QTYPE_A,
&pDNSARecord);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateAddUpdateSection(
pDNSUpdateRequest,
pDNSARecord);
BAIL_ON_LWDNS_ERROR(dwError);
pDNSARecord = NULL;
// Add an A record for every IP address that belongs to the computer. If
// the delete operation above deleted IP addresses that actually belong to
// the computer, this will recreate them.
for (; iAddr < dwNumAddrs; iAddr++)
{
PSOCKADDR_IN pSockAddr = NULL;
PCSTR pszAddress = NULL;
pSockAddr = &pAddrArray[iAddr];
pszAddress = inet_ntoa(pSockAddr->sin_addr);
LWDNS_LOG_INFO("Adding IP Address [%s] to DNS Update request", pszAddress);
dwError = DNSCreateARecord(
pszHostnameFQDN,
DNS_CLASS_IN,
QTYPE_A,
htonl(pSockAddr->sin_addr.s_addr),
&pDNSARecord);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateAddUpdateSection(
pDNSUpdateRequest,
pDNSARecord);
BAIL_ON_LWDNS_ERROR(dwError);
pDNSARecord = NULL;
}
*ppDNSUpdateRequest = pDNSUpdateRequest;
cleanup:
if (pDNSZoneRecord) {
DNSFreeZoneRecord(pDNSZoneRecord);
}
if (pDNSARecord)
{
DNSFreeRecord(pDNSARecord);
}
if (pDNSPRRecord)
{
DNSFreeRecord(pDNSPRRecord);
}
return(dwError);
error:
*ppDNSUpdateRequest = NULL;
if (pDNSUpdateRequest) {
DNSUpdateFreeRequest(pDNSUpdateRequest);
}
goto cleanup;
}
DWORD
DNSUpdateCreatePtrRUpdateRequest(
PDNS_UPDATE_REQUEST* ppDNSUpdateRequest,
PCSTR pszZoneName,
PCSTR pszPtrName,
PCSTR pszHostnameFQDN
)
{
DWORD dwError = 0;
PDNS_UPDATE_REQUEST pDNSUpdateRequest = NULL;
PDNS_ZONE_RECORD pDNSZoneRecord = NULL;
PDNS_RR_RECORD pDNSPtrRecord = NULL;
// Allocate pDNSUpdateRequest and fill in wIdentification and wParameter
dwError = DNSUpdateCreateUpdateRequest(
&pDNSUpdateRequest);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSCreateZoneRecord(
pszZoneName,
&pDNSZoneRecord);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateAddZoneSection(
pDNSUpdateRequest,
pDNSZoneRecord);
BAIL_ON_LWDNS_ERROR(dwError);
pDNSZoneRecord = NULL;
// Delete all PTR records associated with the fqdn.
// This deletes hostnames that do not belong to the computer.
dwError = DNSCreateDeleteRecord(
pszPtrName,
DNS_CLASS_ANY,
QTYPE_PTR,
&pDNSPtrRecord);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateAddUpdateSection(
pDNSUpdateRequest,
pDNSPtrRecord);
BAIL_ON_LWDNS_ERROR(dwError);
pDNSPtrRecord = NULL;
dwError = DNSCreatePtrRecord(
pszPtrName,
DNS_CLASS_IN,
pszHostnameFQDN,
&pDNSPtrRecord);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateAddUpdateSection(
pDNSUpdateRequest,
pDNSPtrRecord);
BAIL_ON_LWDNS_ERROR(dwError);
pDNSPtrRecord = NULL;
*ppDNSUpdateRequest = pDNSUpdateRequest;
cleanup:
if (pDNSZoneRecord) {
DNSFreeZoneRecord(pDNSZoneRecord);
}
if (pDNSPtrRecord)
{
DNSFreeRecord(pDNSPtrRecord);
}
return(dwError);
error:
*ppDNSUpdateRequest = NULL;
if (pDNSUpdateRequest) {
DNSUpdateFreeRequest(pDNSUpdateRequest);
}
goto cleanup;
}
DWORD
DNSSendPtrUpdate(
HANDLE hDNSServer,
PCSTR pszZoneName,
PCSTR pszPtrName,
PCSTR pszHostNameFQDN,
PDNS_UPDATE_RESPONSE * ppDNSUpdateResponse
)
{
DWORD dwError = 0;
PDNS_UPDATE_REQUEST pDNSUpdateRequest = NULL;
PDNS_UPDATE_RESPONSE pDNSUpdateResponse = NULL;
PDNS_ZONE_RECORD pDNSZoneRecord = NULL;
PDNS_RR_RECORD pDNSARecord = NULL;
LWDNS_LOG_INFO("Attempting DNS Update (in-secure)");
dwError = DNSUpdateCreatePtrRUpdateRequest(
&pDNSUpdateRequest,
pszZoneName,
pszPtrName,
pszHostNameFQDN);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateSendUpdateRequest2(
hDNSServer,
pDNSUpdateRequest);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateReceiveUpdateResponse(
hDNSServer,
&pDNSUpdateResponse);
BAIL_ON_LWDNS_ERROR(dwError);
*ppDNSUpdateResponse = pDNSUpdateResponse;
LWDNS_LOG_INFO("DNS Update (in-secure) succeeded");
cleanup:
if (pDNSZoneRecord) {
DNSFreeZoneRecord(pDNSZoneRecord);
}
if (pDNSARecord)
{
DNSFreeRecord(pDNSARecord);
}
if (pDNSUpdateRequest) {
DNSUpdateFreeRequest(pDNSUpdateRequest);
}
return(dwError);
error:
*ppDNSUpdateResponse = NULL;
if (pDNSUpdateResponse) {
DNSUpdateFreeResponse(pDNSUpdateResponse);
}
LWDNS_LOG_ERROR("DNS Update (in-secure) failed. [Error code:%d]", dwError);
goto cleanup;
}
