Exemplos de logNegativeAcknowledgement em C++ (Cpp)

Exemplo n.º 1

Arquivo: braille.c Projeto: brltty/brltty

static size_t
getPacket (BrailleDisplay *brl, FS_Packet *packet) {
  while (1) {
    size_t count = readPacket(brl, packet);

    if (count > 0) {
      switch (packet->header.type) {
        {
          int ok;

        case FS_PKT_NAK:
          cancelMissingAcknowledgementAlarm(brl);
          logNegativeAcknowledgement(packet);

          if (!brl->data->acknowledgementHandler) {
            logMessage(LOG_WARNING, "unexpected NAK");
            continue;
          }

          switch (packet->header.arg1) {
            case FS_ERR_TIMEOUT: {
              int originalLimit = brl->data->outputPayloadLimit;

              if (brl->data->outputPayloadLimit > brl->data->model->cellCount)
                brl->data->outputPayloadLimit = brl->data->model->cellCount;

              if (brl->data->outputPayloadLimit > 1)
                brl->data->outputPayloadLimit -= 1;

              if (brl->data->outputPayloadLimit != originalLimit) {
                logMessage(LOG_WARNING, "maximum payload length reduced from %d to %d",
                           originalLimit, brl->data->outputPayloadLimit);
              }

              break;
            }
          }

          ok = 0;
          goto doAcknowledgement;

        case FS_PKT_ACK:
          cancelMissingAcknowledgementAlarm(brl);

          if (!brl->data->acknowledgementHandler) {
            logMessage(LOG_WARNING, "unexpected ACK");
            continue;
          }

          ok = 1;
          goto doAcknowledgement;

        doAcknowledgement:
          if (handleAcknowledgement(brl, ok)) continue;
          count = 0;
          break;
        }

        default:
          break;
      }
    }

    return count;
  }
}

Exemplo n.º 2

Arquivo: braille.c Projeto: junwuwei/brailleback

static int
getPacket (BrailleDisplay *brl, Packet *packet) {
  while (1) {
    int count = readPacket(brl, packet);

    if (count > 0) {
      switch (packet->header.type) {
        {
          int ok;

        case PKT_NAK:
          logNegativeAcknowledgement(packet);

          if (!brl->data->acknowledgementHandler) {
            logMessage(LOG_WARNING, "Unexpected NAK.");
            continue;
          }

          switch (packet->header.arg1) {
            case PKT_ERR_TIMEOUT: {
              int originalLimit = brl->data->outputPayloadLimit;

              if (brl->data->outputPayloadLimit > brl->data->model->cellCount)
                brl->data->outputPayloadLimit = brl->data->model->cellCount;

              if (brl->data->outputPayloadLimit > 1)
                brl->data->outputPayloadLimit--;

              if (brl->data->outputPayloadLimit != originalLimit)
                logMessage(LOG_WARNING, "Maximum payload length reduced from %d to %d.",
                           originalLimit, brl->data->outputPayloadLimit);
              break;
            }
          }

        handleNegativeAcknowledgement:
          ok = 0;
          goto handleAcknowledgement;

        case PKT_ACK:
          if (!brl->data->acknowledgementHandler) {
            logMessage(LOG_WARNING, "Unexpected ACK.");
            continue;
          }

          ok = 1;
        handleAcknowledgement:
          brl->data->acknowledgementHandler(brl, ok);
          brl->data->acknowledgementHandler = NULL;
          if (writeRequest(brl)) continue;

          count = -1;
          break;
        }
      }
    } else if ((count == 0) && brl->data->acknowledgementHandler &&
               afterTimePeriod(&brl->data->acknowledgementPeriod, NULL)) {
      if (++brl->data->acknowledgementsMissing < 5) {
        logMessage(LOG_WARNING, "Missing ACK; assuming NAK.");
        goto handleNegativeAcknowledgement;
      }

      logMessage(LOG_WARNING, "Too many missing ACKs.");
      count = -1;
    }

    return count;
  }
}