/// <summary>
/// GEt legacy response payload.
/// </summary>
/// <param name="pdu"></param>
/// <param name="requestId"></param>
/// <returns></returns>
private PduPayload GetLegacyResponsePayload(LegacyPdu pdu, ulong?requestId)
{
PduPayload payload = pdu.Payload;
if (payload == null && pdu.ErrorPayload == null)
{
throw new KsiServiceException("Invalid response payload: null.");
}
if (payload != null && payload.Type != GetPayloadTagType(true))
{
throw new KsiServiceException("Unexpected response payload tag type. Type: " + payload.Type + "; Expected type: " + GetPayloadTagType(true));
}
if (pdu.ErrorPayload != null)
{
if (payload != null)
{
// If error payload exists then Payload should be null. Log it.
LogUnexpectedPayloads(pdu);
}
throw new KsiServiceException(FormatServerErrorStatus(pdu.ErrorPayload.Status, pdu.ErrorPayload.ErrorMessage));
}
CheckMacAlgorithm(pdu.Mac, _macAlgorithm);
if (!LegacyPdu.ValidateMac(pdu.Encode(), pdu.Mac, _macKey))
{
throw new KsiServiceException("Invalid MAC in response PDU.");
}
if (requestId.HasValue)
{
RequestResponsePayload requestResponsePayload = payload as RequestResponsePayload;
if (requestResponsePayload == null)
{
throw new KsiServiceException("Cannot get request ID from payload. Payload type: " + payload?.GetType());
}
if (requestResponsePayload.RequestId != requestId)
{
throw new KsiServiceException("Unknown request ID: " + requestResponsePayload.RequestId);
}
}
ResponsePayload responsePayload = payload as ResponsePayload;
if (responsePayload == null)
{
throw new KsiServiceException("Cannot get status from payload. Payload type: " + payload?.GetType());
}
if (responsePayload.Status != 0)
{
throw new KsiServiceException(FormatServerErrorStatus(responsePayload.Status, responsePayload.ErrorMessage));
}
return(payload);
}
/// <summary>
/// Get response payload.
/// </summary>
/// <param name="data"></param>
/// <param name="pdu"></param>
/// <param name="requestId"></param>
/// <returns></returns>
private PduPayload GetResponsePayload(byte[] data, Pdu pdu, ulong?requestId)
{
PduPayload payload = GetPayload(pdu, GetPayloadTagType(false), requestId);
ErrorPayload errorPayload = pdu.ErrorPayload;
if (payload == null && errorPayload == null)
{
throw new KsiServiceException("Invalid response PDU. Could not find a valid payload. PDU: " + pdu);
}
if (errorPayload != null)
{
// There should be only one payload if an error payload exists. If not then write log.
if (pdu.Payloads.Count > 0)
{
LogUnexpectedPayloads(pdu);
}
throw new KsiServiceException(FormatServerErrorStatus(errorPayload.Status, errorPayload.ErrorMessage));
}
CheckMacAlgorithm(pdu.Mac, _macAlgorithm);
if (!Pdu.ValidateMac(data, pdu.Mac, _macKey))
{
throw new KsiServiceException("Invalid MAC in response PDU.");
}
if (requestId.HasValue)
{
RequestResponsePayload requestResponsePayload = payload as RequestResponsePayload;
if (requestResponsePayload == null)
{
throw new KsiServiceException("Cannot get request ID from payload.");
}
if (requestResponsePayload.RequestId != requestId)
{
throw new KsiServiceException("Unknown request ID: " + requestResponsePayload.RequestId);
}
if (requestResponsePayload.Status != 0)
{
throw new KsiServiceException(FormatServerErrorStatus(requestResponsePayload.Status, requestResponsePayload.ErrorMessage));
}
}
if (HasUnexpectedPayload(pdu, payload, GetAdditionallyAllowedPayloadTagTypes()))
{
LogUnexpectedPayloads(pdu);
}
return(payload);
}
/// <summary>
/// Get payoad from PDU by tag type and request ID.
/// </summary>
/// <param name="pdu"></param>
/// <param name="tagType"></param>
/// <param name="requestId"></param>
/// <returns></returns>
private static PduPayload GetPayload(Pdu pdu, uint tagType, ulong?requestId)
{
foreach (PduPayload payload in pdu.Payloads)
{
if (payload.Type == tagType)
{
if (!requestId.HasValue)
{
return(payload);
}
RequestResponsePayload responsePayload = payload as RequestResponsePayload;
if (responsePayload != null && responsePayload.RequestId == requestId)
{
return(payload);
}
}
}
return(null);
}