GEANT / CAT

        //   is guilty. If that one fails, the direct monitoring of servers and ETLRs themselves

        //   closes the loop.

        // let's see if the ETLRs are up

        if (array_key_exists(AbstractTest::INFRA_ETLR, $this->possibleFailureReasons)) {

            $etlrStatus = $this->checkEtlrStatus();

            $this->additionalFindings[AbstractTest::INFRA_ETLR][] = $etlrStatus;

            switch ($etlrStatus["STATUS"]) {

                case AbstractTest::STATUS_GOOD:

                    unset($this->possibleFailureReasons[AbstractTest::INFRA_ETLR]);

                    break;

                case AbstractTest::STATUS_PARTIAL:

                case AbstractTest::STATUS_MONITORINGFAIL:

                    // one of the ETLRs is down, or there is a failure in the monitoring system? 

                    // This probably doesn't impact the user unless he's unlucky and has his session fall into failover.

                    // keep ETLR as a possible problem with original probability

                    break;

                case AbstractTest::STATUS_DOWN:

                    // Oh! Well if it is not international roaming, that still doesn't have an effect /in this case/. 

                    if ($this->idPFederation == $this->visitedFlr) {

                        unset($this->possibleFailureReasons[AbstractTest::INFRA_ETLR]);

                        break;

                    }

                    // But it is about int'l roaming, and we are spot on here.

                    // Raise probability by much (even monitoring is sometimes wrong, or a few minutes behind reality)

                    $this->possibleFailureReasons[AbstractTest::INFRA_ETLR] = 0.95;

            }

        }

        // then let's check the IdP's FLR, if we know the IdP federation at all

        if ($this->idPFederation != NULL) {

            }

            // now let's theck the link

            if (array_key_exists(AbstractTest::INFRA_LINK_ETLR_NRO_IDP, $this->possibleFailureReasons)) {

                $flrUplinkStatus = $this->checkFedEtlrUplink($this->idPFederation);

                $this->additionalFindings[AbstractTest::INFRA_NRO_IDP][] = $flrUplinkStatus;

                switch ($flrUplinkStatus["STATUS"]) {

                    case AbstractTest::STATUS_GOOD:

                        unset($this->possibleFailureReasons[AbstractTest::INFRA_NRO_IDP]);

                        unset($this->possibleFailureReasons[AbstractTest::INFRA_LINK_ETLR_NRO_IDP]);

                        break;

                    case AbstractTest::STATUS_PARTIAL:

                        // a subset of the FLRs is down? This probably doesn't impact the user unless he's unlucky and has his session fall into failover.

                        // keep FLR as a possible problem with original probability

                        break;

                    case AbstractTest::STATUS_DOWN:

                        // Raise probability by much (even monitoring is sometimes wrong, or a few minutes behind reality)

                        // if earlier test found the server itself to be the problem, keep it, otherwise put the blame on the link

                        if ($this->possibleFailureReasons[AbstractTest::INFRA_NRO_IDP] != 0.95) {

                            $this->possibleFailureReasons[AbstractTest::INFRA_LINK_ETLR_NRO_IDP] = 0.95;

                        }

                }

            }

        }

        // now, if we know the country the user is currently in, let's see 

        // if the NRO SP-side is up