FIXUP: feat(gtpv2): implement cause and ebi

Author: Takuto88

src/main/java/com/sipgate/udpproxy/udp/payload/gtpv2/ie/Cause.java

@@ -0,0 +1,144 @@
+package com.sipgate.udpproxy.udp.payload.gtpv2.ie;
+
+import com.sipgate.udpproxy.udp.payload.gtpv2.ie.decoder.BitHelper;
+
+public class Cause extends InformationElement {
+	public Cause(final byte type, final byte spare, final byte instance, final byte[] payload) {
+		super(type, spare, instance, payload);
+	}
+
+	public int getCause() {
+		return BitHelper.toInt(payload[0]);
+	}
+
+	public CauseType getCauseType() {
+		return CauseType.fromValue(BitHelper.toInt(payload[0]));
+	}
+
+	public boolean isCauseSource() {
+		return BitHelper.isBitSet(payload[1], 1);
+	}
+
+	public boolean isBearerContextIeError() {
+		return BitHelper.isBitSet(payload[1], 2);
+	}
+
+	public boolean isPdnConnectionIeError() {
+		return BitHelper.isBitSet(payload[1], 3);
+	}
+
+	public enum CauseType {
+		RESERVED_0(0),
+		RESERVED_1(1),
+		LOCAL_DETACH(2),
+		COMPLETE_DETACH(3),
+		RAT_CHANGED_FROM_3GPP_TO_NON_3GPP(4),
+		ISR_DEACTIVATION(5),
+		ERROR_INDICATION_RECEIVED_FROM_RNC_ENB_SGSN_OR_MME(6),
+		IMSI_DETACH_ONLY(7),
+		REACTIVATION_REQUESTED(8),
+		PDN_RECONNECTION_TO_THIS_APN_DISALLOWED(9),
+		ACCESS_CHANGED_FROM_NON_3GPP_TO_3GPP(10),
+		PDN_CONNECTION_INACTIVITY_TIMER_EXPIRED(11),
+		PGW_NOT_RESPONDING(12),
+		NETWORK_FAILURE(13),
+		QOS_PARAMETERS_REJECTED(14),
+		EPS_TO_5GS_MOBILITY(15),
+		REQUEST_ACCEPTED(16),
+		REQUEST_ACCEPTED_PARTIALLY(17),
+		NEW_PDN_TYPE_NETWORK_PREFERENCE(18),
+		NEW_PDN_TYPE_SINGLE_ADDRESS_BEARER_ONLY(19),
+		// 23 - 63 spare
+		CONTEXT_NOT_FOUND(64),
+		INVALID_MESSAGE_FORMAT(65),
+		VERSION_NOT_SUPPORTED_BY_NEXT_PEER(66),
+		INVALID_LENGTH(67),
+		SERVICE_NOT_SUPPORTED(68),
+		MANDATORY_IE_INCORRECT(69),
+		MANDATORY_IE_MISSING(70),
+		// 71: Shall not be used
+		SYSTEM_FAILURE(72),
+		NO_RESOURCES_AVAILABLE(73),
+		SEMANTIC_ERROR_IN_THE_TFT_OPERATION(74),
+		SYNTACTIC_ERROR_IN_THE_TFT_OPERATION(75),
+		SEMANTIC_ERRORS_IN_PACKET_FILTER(76),
+		SYNTACTIC_ERRORS_IN_PACKET_FILTER(77),
+		MISSING_OR_UNKNOWN_APN(78),
+		// 79: Shall not be used
+		GRE_KEY_NOT_FOUND(80),
+		RELOCATION_FAILURE(81),
+		DENIED_IN_RAT(82),
+		PREFERRED_PDN_TYPE_NOT_SUPPORTED(83),
+		ALL_DYNAMIC_ADDRESSES_ARE_OCCUPIED(84),
+		UE_CONTEXT_WITHOUT_TFT_ALREADY_ACTIVATED(85),
+		PROTOCOL_TYPE_NOT_SUPPORTED(86),
+		UE_NOT_RESPONDING(87),
+		UE_REFUSES(88),
+		SERVICE_DENIED(89),
+		UNABLE_TO_PAGE_UE(90),
+		NO_MEMORY_AVAILABLE(91),
+		USER_AUTHENTICATION_FAILED(92),
+		APN_ACCESS_DENIED_NO_SUBSCRIPTION(93),
+		REQUEST_REJECTED(94),
+		P_TMSI_SIGNATURE_MISMATCH(95),
+		IMSI_IMEI_NOT_KNOWN(96),
+		SEMANCTIC_ERROR_IN_THE_TAD_OPERATION(97),
+		SYNTACTIC_ERROR_IN_THE_TAD_OPERATION(98),
+		// 99: Shall not be used
+		REMOTE_PEER_NOT_RESPONDING(100),
+		COLLISION_WITH_NETWORK_INITIATED_REQUEST(101),
+		UNABLE_TO_PAGE_UE_DUE_TO_SUSPENSION(102),
+		CONDITIONAL_IE_MISSING(103),
+		APN_RESTRICTION_TYPE_INCOMPATIBLE_WITH_CURRENTLY_ACTIVE_PDN_CONNECTION(104),
+		INVALID_OVERALL_LENGTH_OF_THE_TRIGGERED_RESPONSE_MESSAGE(105),
+		DATA_FORWARDING_NOT_SUPPORTED(106),
+		INVALID_REPLY_FROM_REMOTE_PEER(107),
+		FALLBACK_TO_GTPV1(108),
+		INVALID_PEER(109),
+		TEMPORARILY_REJECTED_DUE_TO_HO_PROCEDURE(110),
+		MODIFICATIONS_NOT_LIMITED_TO_S1_U_BEARERS(111),
+		REQUEST_REJECTED_FOR_PMIPV6_REASON(112),
+		APN_CONGESTION(113),
+		BEARER_HANDLING_NOT_SUPPORTED(114),
+		UE_ALREADY_RE_ATTACHED(115),
+		MULTIPLE_PDN_CONNECTION_FOR_A_GIVEN_APN_NOT_ALLOWED(116),
+		TARGET_ACCESS_RESTRICTED_FOR_THE_SUBSCRIBER(117),
+		// 118: Shall not be used
+		MME_SGSN_REFUSES_DUE_TO_VPLMN_POLICY(119),
+		GTP_C_ENTITY_CONGESTION(120),
+		LATE_OVERLAPPING_REQUEST(121),
+		TIMED_OUT_REQUEST(122),
+		UE_IS_TEMPORARILY_NOT_REACHABLE_DUE_TO_POWER_SAVING(123),
+		RELOCATION_FAILURE_DUE_TO_NAS_MESSAGE_REDIRECTION(124),
+		UE_NOT_AUTHORIZED_BY_OCS_OR_EXTERNAL_AAA_SERVER(125),
+		MULTIPLE_ACCESS_TO_A_PDN_CONNECTION_NOT_ALLOWED(126),
+		REQUEST_REJECTED_DUE_TO_UE_CAPABILITY(127),
+		S1_U_PATH_FAILURE(128),
+		NOT_ALLOWED_5GC(129),
+		PGW_MISMATCH_WITH_NETWORK_SLICE_SUBSCRIBED_BY_THE_UE(130),
+		REJECTION_DUE_TO_PAGING_RESTRICTION(131),
+		// 132 - 255: Spare
+		;
+
+
+		private final int value;
+
+		CauseType(final int value) {
+			this.value = value;
+		}
+
+		public int getValue() {
+			return value;
+		}
+
+		public static CauseType fromValue(final int value) {
+			for (final var causeType : values()) {
+				if (causeType.getValue() == value) {
+					return causeType;
+				}
+			}
+			return null;
+		}
+	}
+
+}

src/main/java/com/sipgate/udpproxy/udp/payload/gtpv2/ie/EpsBearerId.java

@@ -0,0 +1,20 @@
+package com.sipgate.udpproxy.udp.payload.gtpv2.ie;
+
+import com.sipgate.udpproxy.udp.payload.gtpv2.ie.decoder.BitHelper;
+
+public class EpsBearerId extends InformationElement {
+	public EpsBearerId(final byte type, final byte spare, final byte instance, final byte[] payload) {
+		super(type, spare, instance, payload);
+	}
+
+	public int getEpsBearerId() {
+		return BitHelper.toInt(payload[0], 1, 4);
+	}
+
+	@Override
+	public String toString() {
+		return "EpsBearerId{" +
+				"epsBearerId=" + getEpsBearerId() +
+				'}';
+	}
+}

src/main/java/com/sipgate/udpproxy/udp/payload/gtpv2/ie/InformationElement.java

@@ -80,12 +80,16 @@ private static InformationElement createByType(final byte type, final byte spare
 		switch (type) {
 			case 0x01:
 				return new Imsi(type, spare, instance, payload);
+			case 0x02:
+				return new Cause(type, spare, instance, payload);
 			case 0x03:
 				return new RestartCounter(type, spare, instance, payload);
 			case 0x47:
 				return new AccessPointName(type, spare, instance, payload);
 			case 0x48:
 				return new AggregateMaximumBitRate(type, spare, instance, payload);
+			case 0x49:
+				return new EpsBearerId(type, spare, instance, payload);
 			case 0x4b:
 				return new MobileEquipmentIdentity(type, spare, instance, payload);
 			case 0x4c: