tsn si ssn ppi
4 2 2 4 SCTP_SACK_CHUNK
字段 ChunkType ChunkFlag ChunkLength CTsnAck ARcvWndCredit NumGapAck NumDupTsn 长度（字节） 1 1 2 4 4 2 2
B. MTP 3 User Adaptation Layer M3UA_HEADER
字段 Version Reserved MessageClass MessageType MessageLength 长度（字节） 1 1 1 1 4
M3UA_MESSAGE_CLASS
M3UA Message Class MGMT TM SSNM ASPSM ASPTM RKM Value 0 1 2 3 4 9 Description Management Messages Transfer Messages SS7 Signalling Network Management Messages ASP State Maintenance Messages ASP Traffic Maintenance Messages Routing Key Management Messages
M3UA_TM_TYPE
M3UA Transfer Messages Type RESERVED PAYLOADDATA Value 0 1 Description Payload Data M3UA_TAG_PARAMETER
M3UA Tag Parameter INFO_STRING ROUTING_CONTEXT DIAGNOSTIC_INFORMATION HEARTBEAT_DATA TRAFFIC_MODE_TYPE ERROR_CODE STATUS ASP_IDENTIFIER AFFRCTED_POINT_CODE CORRELATION_ID NETWORK_APPEARANCE UEER_CAUSE CONGESTION_INDICATIONS CONCERNED_DESTINATION ROUTING_KEY REGISTRATION_RESULT DEREGISTRATION_RESULT LOCAL_ROUTING_KEY_IDENTIFIER DESTINATION_POINT_CODE SERVICE_INDICATORS ORIGINATING_POINT_CODE_LIST PROTOCOL_DATA REGISTRATION_STATUS DEREGISTRATION_STATUS Value 0x0004 0x0006 0x0007 0x0009 0x000b 0x000c 0x000d 0x0011 0x0012 0x0013 0x0200 0x0204 0x0205 0x0206 0x0207 0x0208 0x0209 0x020a 0x020b 0x020c 0x020e 0x0210 0x0212 0x0213 Description INFO String Routing Context Diagnostic Information Heartbeat Data Traffic Mode Type Error Code Status ASP Identifier Affected Point Code Correlation ID Network Appearance User/Cause Congestion Indications Concerned Destination Routing Key Registration Result Deregistration Result Local Routing Key Identifier Destination Point Code Service Indicators Originating Point Code List Protocol Data Registration Status Deregistration Status M3UA_NETWORK_APPEARANCE
字段 长度（字节） tag_Parameter ParameterLength ParameterValue 2 2 4 M3UA_ROUTING_CONTEXT
字段 tag_Parameter ParameterLength ParameterValue
长度（字节） 2 2 4 M3UA_PROTOCOL_DATA
字段 tag_Parameter ParameterLength opc dpc si ni mp sls
长度（字节） 2 2 4 4 1 1 1 1 M3UA_CORRELATION_ID
字段 tag_Parameter ParameterLength ParameterValue 长度（字节） 2 2 4 C. Signalling Connection Control Part SCCP_MESSAGE_TYPE
SCCP Message Type Value Description CONNECTION_REQUEST CONNECTION_CONFIRM CONNECTION_REFUSED RELEASED RELEASE_COMPLETE DATA_FORM1 1 2 3 4 5 6 Connection request (CR) Connection confirm (CC) Connection refused (CREF) Released (RLSD) Release complete (RLC) Data form 1 (DT1)
SCCP_PARAMETER_NAME
SCCP Paramerter Name END_OF_OPTIONAL_PARAMETERS DESTINATION_LOCAL_REFERENCE SOURCE_LOCAL_REFERENCE CALLED_PARTY_ADDRESS CALLING_PARTY_ADDRESS PROTOCOL_CLASS SEGMENTING_REASSEMBLING RECEIVE_SEQUENCE_NUMBER SEQUENCING_SEGMENTING CREDIT RELEASE_CAUSE RETURN_CAUSE RESET_CAUSE ERROR_CAUSE REFUSAL_CAUSE SCCP_DATA SEGMENTATION HOP_COUNTER IMPORTANCE LONG_DATA Value 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0a 0x0b 0x0c 0x0d 0x0e 0x0f 0x10 0x11 0x12 0x13 Description End of optional parameters Destination local reference Source local reference Called party address Calling party address Protocol class Segmenting/reassembling Receive sequence number Sequencing/segmenting Credit Release cause Return cause Reset cause Error cause Refusal cause Data Segmentation Hop counter Importance Long data
SCCP_CONNECTION_REQUEST_HEADER
字段 MessageType SourceLocalRef ProtocolClass 长度（字节） 1 3 1 SCCP_CONNECTION_CONFIRM_HEADER
字段 MessageType DestinationLocalRef SourceLocalRef ProtocolClass 长度（字节） 1 3 3 1 SCCP_CONNECTION_REFUSED_HEADER
字段 MessageType DestinationLocalRef RefusalCause 长度（字节） 1 3 1
SCCP_RELEASED_HEADER
字段 MessageType DestinationLocalRef SourceLocalRef ReleaseCause 长度（字节） 1 3 3 1 SCCP_RELEASE_COMPLETE_HEADER
字段 MessageType DestinationLocalRef SourceLocalRef 长度（字节） 1 3 3 SCCP_DATA_FORM1_HEADER
字段 MessageType DestinationLocalRef 长度（字节） 1 3 SegmentReasseb 1