bsc: inter-BSC HO: add TC_ho_out_of_this_bsc, TC_ho_into_this_bsc

Add f_gen_handover_req() like f_gen_ass_req(), to match AoIP or SCCPlite
requirements.

For incoming HO, MSC_ConnHdlr needs to know the SCCP addresses to expect the
incoming SCCP Connection from MSC to BSC. Add 'handover' section to
TestHdlrParams, and pass in the addresses from test_CT via that.

In osmo-bsc.cfg, add a remote neighbor config, so that the VTY command
'handover any to arfcn 123 bsic any' can trigger an outgoing inter-BSC HO.

Add various BSSMAP handover templates to BSSMAP_Templates.ttcn.
Add RR Ho Command template to L3_Templates.ttcn.

Move ts_BSSAP_Conn_Req() from msc/BSC_ConnectionHandler.ttcn to
library/BSSMAP_Emulation.ttcn, so we can also model an SCCP Connection Request
in BSC_Tests.ttcn (this time from MSC to BSC).

Add the two new tests to bsc/expected-results.xml.

Related: OS#2283
Change-Id: Id22852d4be7f127d827e7a8beeec55db27c07f03

3 files changed, 209 insertions, 0 deletions

diff --git a/library/BSSMAP_Emulation.ttcn b/library/BSSMAP_Emulation.ttcn
index 921ac59b..55ce2fb0 100644
--- a/library/BSSMAP_Emulation.ttcn
+++ b/library/BSSMAP_Emulation.ttcn
@@ -102,6 +102,12 @@ template PDU_DTAP_MO tr_PDU_DTAP_MO(template PDU_ML3_MS_NW dtap, template OCT1 d
 	dtap := dtap
 }
 
+template BSSAP_Conn_Req ts_BSSAP_Conn_Req(SCCP_PAR_Address peer, SCCP_PAR_Address own, PDU_BSSAP bssap) := {
+	addr_peer := peer,
+	addr_own := own,
+	bssap := bssap
+};
+
 
 /* port between individual per-connection components and this dispatcher */
 type port BSSAP_Conn_PT message {
diff --git a/library/BSSMAP_Templates.ttcn b/library/BSSMAP_Templates.ttcn
index 70db2ece..adfcc9e2 100644
--- a/library/BSSMAP_Templates.ttcn
+++ b/library/BSSMAP_Templates.ttcn
@@ -670,6 +670,139 @@ template PDU_BSSAP tr_BSSMAP_ClearRequest modifies tr_BSSAP_BSSMAP := {
 	}
 }
 
+template PDU_BSSAP tr_BSSMAP_HandoverRequired modifies tr_BSSAP_BSSMAP := {
+	pdu := {
+		bssmap := {
+			handoverRequired := {
+				messageType := '11'O
+			}
+		}
+	}
+}
+
+template (value) PDU_BSSAP ts_BSSMAP_HandoverCommand(octetstring layer3info)
+modifies ts_BSSAP_BSSMAP := {
+	pdu := {
+		bssmap := {
+			handoverCommand := {
+				messageType := '13'O,
+				layer3Information := {
+					elementIdentifier := '17'O,
+					lengthIndicator := 0,
+					layer3info := layer3info
+				},
+				cellIdentifier := omit,
+				newBSSToOldBSSInfo := omit,
+				talkerPriority := omit
+			}
+		}
+	}
+}
+
+template PDU_BSSAP ts_BSSMAP_HandoverRequest(
+		template BSSMAP_IE_CircuitIdentityCode cic := omit,
+		template BSSMAP_IE_AoIP_TransportLayerAddress aoip_tla := omit,
+		template BSSMAP_IE_CellIdentifier cell_id_target := ts_CellID_LAC_CI(1, 0),
+		template BSSMAP_IE_CellIdentifier cell_id_source := ts_CellID_LAC_CI(1, 1)
+		)
+modifies ts_BSSAP_BSSMAP := {
+	pdu := {
+		bssmap := {
+			handoverRequest := {
+				messageType := '10'O,
+				channelType := ts_BSSMAP_IE_ChannelType,
+				encryptionInformation :=
+					ts_BSSMAP_IE_EncrInfo('0000000000000000'O,'01'O),
+				classmarkInformationType := {
+					classmarkInformationType1 := {
+						elementIdentifier := '1D'O,
+						rf_PowerCapability := '000'B,
+						a5_1 := '0'B,
+						esind := '0'B,
+						revisionLevel := '10'B,
+						spare1_1 := '0'B
+					}
+					},
+				cellIdentifierSource := cell_id_source,
+				priority := omit,
+				circuitIdentityCode := cic,
+				downLinkDTX_Flag := omit,
+				cellIdentifierTarget := cell_id_target,
+				interferenceBandToBeUsed := omit,
+				cause := omit,
+				classmarkInformationType3 := omit,
+				currentChannelType1 := omit,
+				speechVersion := omit,
+				groupCallReference := omit,
+				talkerFlag := omit,
+				configurationEvolutionIndication := omit,
+				chosenEncryptionAlgorithm := omit,
+				oldToNewBSSInfo := omit,
+				lSAInformation := omit,
+				lSAAccessControlSuppression := omit,
+				serviceHandover := omit,
+				iMSI_bssmap := omit,
+				sourceToTargetRNCTransparentInfo := omit,
+				sourceToTargetRNCTransparentInfoCDMA := omit,
+				sNAAccessInformation := omit,
+				talkerPriority := omit,
+				aoIPTransportLayer := aoip_tla,
+				codecList := omit,
+				callIdentifier := omit,
+				kC128 := omit,
+				globalCallReference := omit,
+				lCLS_Configuration := omit,
+				connectionStatusControl := omit
+			}
+		}
+	}
+}
+
+template PDU_BSSAP tr_BSSMAP_HandoverRequestAcknowledge(template octetstring layer3info)
+modifies tr_BSSAP_BSSMAP := {
+	pdu := {
+		bssmap := {
+			handoverRequestAck := {
+				messageType := '12'O,
+				layer3Information := {
+					elementIdentifier := '17'O,
+					lengthIndicator := ?,
+					layer3info := layer3info
+				}
+			}
+		}
+	}
+}
+
+template PDU_BSSAP tr_BSSMAP_HandoverDetect
+modifies tr_BSSAP_BSSMAP := {
+	pdu := {
+		bssmap := {
+			handoverDetect := {
+				messageType := '1B'O,
+				talkerPriority := *
+			}
+		}
+	}
+}
+
+template PDU_BSSAP tr_BSSMAP_HandoverComplete
+modifies tr_BSSAP_BSSMAP := {
+	pdu := {
+		bssmap := {
+			handoverComplete := {
+				messageType := '14'O,
+				rR_Cause := *,
+				talkerPriority := *,
+				speechCodec := *,
+				codecList := *,
+				chosenEncryptionAlgorithm := *,
+				chosenChannel := *,
+				lCLS_BSS_Status := *
+			}
+		}
+	}
+}
 
 template BSSMAP_IE_IMSI ts_BSSMAP_Imsi(hexstring imsi_digits) := {
 	elementIdentifier := '08'O,
diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index 1ce84cf2..a05aba2e 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -496,6 +496,76 @@ template (value) PDU_ML3_MS_NW ts_RRM_HandoverComplete(OCT1 cause) := {
 	}
 }
 
+template (value) PDU_ML3_NW_MS ts_RR_HandoverCommand := {
+	discriminator := '0110'B,
+	tiOrSkip := {
+		skipIndicator := '0000'B
+	},
+	msgs := {
+		rrm := {
+			handoverCommand := {
+				messageType := '00101011'B,
+				cellDescription := {
+					bcc := '001'B,
+					ncc := '010'B,
+					BCCHArfcn_HighPart := '11'B,
+					BCCHArfcn_LowPart := '04'O
+				},
+				channelDescription2 := {
+					timeslotNumber := '110'B,
+					channelTypeandTDMAOffset := '00001'B,
+					octet3 := '00'O,
+					octet4 := '09'O
+				},
+				handoverReference := {
+					handoverReferenceValue := '00'O
+				},
+				powerCommandAndAccesstype := {
+					powerlevel := '00000'B,
+					fPC_EP := '0'B,
+					ePC_Mode := '0'B,
+					aTC := '0'B
+				},
+				synchronizationIndication := omit,
+				frequencyShortListAfterTime := omit,
+				frequencyListAfterTime := omit,
+				cellChannelDescription := omit,
+				multislotAllocation := omit,
+				modeOfChannelSet1 := omit,
+				modeOfChannelSet2 := omit,
+				modeOfChannelSet3 := omit,
+				modeOfChannelSet4 := omit,
+				modeOfChannelSet5 := omit,
+				modeOfChannelSet6 := omit,
+				modeOfChannelSet7 := omit,
+				modeOfChannelSet8 := omit,
+				descrOf2ndCh_at := omit,
+				modeOf2ndChannel := omit,
+				frequencyChannelSequence_at := omit,
+				mobileAllocation_at := omit,
+				startingTime := omit,
+				timeDifference := omit,
+				timingAdvance := omit,
+				frequencyShortListBeforeTime := omit,
+				frequencyListBeforeTime := omit,
+				descrOf1stCh_bt := omit,
+				descrOf2ndCh_bt := omit,
+				frequencyChannelSequence_bt := omit,
+				mobileAllocation_bt := omit,
+				cipherModeSetting := omit,
+				vGCS_TargetModeIndication := omit,
+				multiRateConfiguration := omit,
+				dynamicARFCN_Mapping := omit,
+				vGCS_Ciphering_Parameters := omit,
+				dedicatedServiceInformation := omit,
+				pLMNIndex := omit,
+				extendedTSCSet_afterTime := omit,
+				extendedTSCSet_beforeTime := omit
+			}
+		}
+	}
+}
+
 function ts_CM3_TLV(template (omit) OCTN cm3) return template MobileStationClassmark3_TLV {
 	if (not isvalue(cm3)) {
 		return omit;