static uint16_t DNSCreateIPv4QueryDN(const LLADP * pLLAdp, const uint8_t * pBase, const uint8_t * pName, const uint8_t * pEnd, DNSDG * pDNSDG)
{
return(DNSCreateIPv4Query(pLLAdp, DNSCopyDomainName(pBase, pName, pEnd, pDNSDG->rrRecords, sizeof(pLLAdp->pDNSMem->rgbDNSData)), pDNSDG));
}
DWORD
DNSBuildMessageBuffer(
PDNS_UPDATE_REQUEST pDNSUpdateRequest,
PCSTR pszKeyName,
DWORD * pdwTimeSigned,
WORD * pwFudge,
PBYTE * ppMessageBuffer,
PDWORD pdwMessageSize
)
{
DWORD dwError = 0;
PBYTE pSrcBuffer = NULL;
DWORD dwReqMsgSize = 0;
DWORD dwAlgorithmLen = 0;
DWORD dwNameLen = 0;
PBYTE pMessageBuffer = NULL;
DWORD dwMessageSize = 0;
PBYTE pOffset = NULL;
WORD wnError, wError = 0;
WORD wnFudge = 0;
WORD wFudge = DNS_ONE_HOUR_IN_SECS;
WORD wnOtherLen = 0, wOtherLen = 0;
DWORD dwBytesCopied = 0;
WORD wnClass = 0, wClass = DNS_CLASS_ANY;
DWORD dwnTTL = 0, dwTTL = 0;
DWORD dwnTimeSigned, dwTimeSigned = 0;
HANDLE hSendBuffer = (HANDLE)NULL;
PDNS_DOMAIN_NAME pDomainName = NULL;
PDNS_DOMAIN_NAME pAlgorithmName = NULL;
//PBYTE pOtherLen = NULL;
WORD wTimePrefix = 0;
WORD wnTimePrefix = 0;
dwError = DNSDomainNameFromString(pszKeyName, &pDomainName);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSGetDomainNameLength(pDomainName, &dwNameLen);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSDomainNameFromString(DNS_GSS_ALGORITHM, &pAlgorithmName);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSGetDomainNameLength(pAlgorithmName, &dwAlgorithmLen);
BAIL_ON_LWDNS_ERROR(dwError);
dwError = DNSUpdateBuildRequestMessage(
pDNSUpdateRequest,
&hSendBuffer);
BAIL_ON_LWDNS_ERROR(dwError);
dwReqMsgSize = DNSGetSendBufferContextSize(hSendBuffer);
dwMessageSize += dwReqMsgSize;
dwMessageSize += dwNameLen;
dwMessageSize += sizeof(WORD); //CLASS
dwMessageSize += sizeof(DWORD); //TTL
dwMessageSize += dwAlgorithmLen;
dwMessageSize += (sizeof(WORD) + sizeof(DWORD)); //Time Signed
dwMessageSize += sizeof(WORD); //Fudge
dwMessageSize += sizeof(WORD); //wError
dwMessageSize += sizeof(WORD); //Other Len
dwMessageSize += wOtherLen;
dwError = DNSAllocateMemory(
dwMessageSize,
(PVOID *)&pMessageBuffer);
BAIL_ON_LWDNS_ERROR(dwError);
pOffset = pMessageBuffer;
pSrcBuffer = DNSGetSendBufferContextBuffer(hSendBuffer);
memcpy(pOffset, pSrcBuffer, dwReqMsgSize);
pOffset += dwReqMsgSize;
dwError = DNSCopyDomainName(pOffset, pDomainName, &dwBytesCopied);
BAIL_ON_LWDNS_ERROR(dwError);
pOffset += dwBytesCopied;
wnClass = htons(wClass);
memcpy(pOffset, &wnClass, sizeof(WORD));
pOffset += sizeof(WORD);
dwnTTL = htonl(dwTTL);
memcpy(pOffset, &dwnTTL, sizeof(DWORD));
pOffset += sizeof(DWORD);
dwError = DNSCopyDomainName(pOffset, pAlgorithmName, &dwBytesCopied);
BAIL_ON_LWDNS_ERROR(dwError);
pOffset += dwBytesCopied;
wnTimePrefix = htons(wTimePrefix);
memcpy(pOffset, &wnTimePrefix, sizeof(WORD));
pOffset += sizeof(WORD);
time((time_t*)&dwTimeSigned);
dwnTimeSigned = htonl(dwTimeSigned);
memcpy(pOffset, &dwnTimeSigned, sizeof(DWORD));
pOffset += sizeof(DWORD);
wnFudge = htons(wFudge);
memcpy(pOffset, &wnFudge, sizeof(WORD));
pOffset += sizeof(WORD);
wnError = htons(wError);
memcpy(pOffset, &wnError, sizeof(WORD));
pOffset += sizeof(WORD);
wnOtherLen = htons(wOtherLen);
memcpy(pOffset, &wnOtherLen, sizeof(WORD));
pOffset += sizeof(WORD);
*ppMessageBuffer = pMessageBuffer;
*pdwMessageSize = dwMessageSize;
*pdwTimeSigned = dwTimeSigned;
*pwFudge = wFudge;
cleanup:
if (pAlgorithmName)
{
DNSFreeDomainName(pAlgorithmName);
}
if (pDomainName)
{
DNSFreeDomainName(pDomainName);
}
if (hSendBuffer != (HANDLE)NULL)
{
DNSFreeSendBufferContext(hSendBuffer);
}
return(dwError);
error:
if (pMessageBuffer) {
DNSFreeMemory(pMessageBuffer);
}
*ppMessageBuffer = NULL;
*pdwMessageSize = 0;
*pdwTimeSigned = dwTimeSigned;
*pwFudge = wFudge;
goto cleanup;
}
