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OME/IP，全称为Scalable service-Oriented MiddlewarE over IP，是一种面向服务的可伸缩的协议,用于控制消息的汽车中间件的解决方案。

SOME/IP Protocol Specification

AUTOSAR FO Release 1.3.0

Document Title SOME/IP Protocol Specification

Document Owner AUTOSAR

Document Responsibility AUTOSAR

Document Identification No 696

Document Status Final

Part of AUTOSAR Standard Foundation

Part of Standard Release 1.3.0

Document Change History

Date Release Changed by

Description

2017-12-08 1.3.0

AUTOSAR

Release

Management

• No content changes

2017-10-27 1.2.0

AUTOSAR

Release

Management

• Editorial changes

2017-03-31 1.1.0

AUTOSAR

Release

Management

• Serialization of Structured Datatypes

and Arguments with Identifier and

optional members

2016-11-30 1.0.0

AUTOSAR

Release

Management

Initial Release

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— AUTOSAR CONFIDENTIAL —

Document ID 696: AUTOSAR_PRS_SOMEIPProtocol

SOME/IP Protocol Specification

AUTOSAR FO Release 1.3.0

Disclaimer

This work (specification and/or software implementation) and the material contained in

it, as released by AUTOSAR, is for the purpose of information only. AUTOSAR and the

companies that have contributed to it shall not be liable for any use of the work.

The material contained in this work is protected by copyright and other types of intel-

lectual property rights. The commercial exploitation of the material contained in this

work requires a license to such intellectual property rights.

This work may be utilized or reproduced without any modification, in any form or by

any means, for informational purposes only. For any other purpose, no part of the work

may be utilized or reproduced, in any form or by any means, without permission in

writing from the publisher.

The work has been developed for automotive applications only. It has neither been

developed, nor tested for non-automotive applications.

The word AUTOSAR and the AUTOSAR logo are registered trademarks.

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— AUTOSAR CONFIDENTIAL —

Document ID 696: AUTOSAR_PRS_SOMEIPProtocol

SOME/IP Protocol Specification

AUTOSAR FO Release 1.3.0

Table of Contents

1 Introduction and overview 5

1.1 Protocol purpose and objectives . . . . . . . . . . . . . . . . . . . . . . 5

1.2 Applicability of the protocol . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2.1 Constraints and assumptions . . . . . . . . . . . . . . . . . . 5

1.2.2 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3 Dependencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4 Document Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Protocol Requirements 8

2.1 Requirements Traceability . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 Acronyms and Abbreviations 15

4 Protocol specification 16

4.1 Specification of SOME/IP on wire-format (Serialization) . . . . . . . . . 16

4.1.1 Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.1.1.1 Message ID [32 Bit] . . . . . . . . . . . . . . . . . . 17

4.1.1.2 Length [32 Bit] . . . . . . . . . . . . . . . . . . . . . 17

4.1.1.3 Request ID [32 Bit] . . . . . . . . . . . . . . . . . . . 18

4.1.1.4 Protocol Version [8 Bit] . . . . . . . . . . . . . . . . . 19

4.1.1.5 Interface Version [8 Bit] . . . . . . . . . . . . . . . . 20

4.1.1.6 Message Type [8 Bit] . . . . . . . . . . . . . . . . . . 20

4.1.1.7 Return Code [8 Bit] . . . . . . . . . . . . . . . . . . . 21

4.1.1.8 Payload [variable size] . . . . . . . . . . . . . . . . . 21

4.1.2 Event, Field and Eventgroup . . . . . . . . . . . . . . . . . . 22

4.1.3 Endianess . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.1.4 Serialization of Data Structures . . . . . . . . . . . . . . . . . 22

4.1.4.1 Basic Datatypes . . . . . . . . . . . . . . . . . . . . 24

4.1.4.2 Structured Datatypes (structs) . . . . . . . . . . . . . 24

4.1.4.3 Structured Datatypes and Arguments with Identifier

and optional members . . . . . . . . . . . . . . . . . 25

4.1.4.4 Strings . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.1.4.5 Arrays (fixed length) . . . . . . . . . . . . . . . . . . 34

4.1.4.6 Dynamic Length Arrays . . . . . . . . . . . . . . . . 35

4.1.4.7 Enumeration . . . . . . . . . . . . . . . . . . . . . . 37

4.1.4.8 Bitfield . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.1.4.9 Union / Variant . . . . . . . . . . . . . . . . . . . . . 37

4.2 Specification of SOME/IP Protocol . . . . . . . . . . . . . . . . . . . . 39

4.2.1 Transport Protocol Bindings . . . . . . . . . . . . . . . . . . . 39

4.2.1.1 UDP Binding . . . . . . . . . . . . . . . . . . . . . . 40

4.2.1.2 TCP Binding . . . . . . . . . . . . . . . . . . . . . . 40

4.2.1.3 Multiple Service-Instances . . . . . . . . . . . . . . . 42

4.2.1.4 Transporting large SOME/IP messages of UDP

(SOME/IP-TP) . . . . . . . . . . . . . . . . . . . . . 43

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— AUTOSAR CONFIDENTIAL —

Document ID 696: AUTOSAR_PRS_SOMEIPProtocol

SOME/IP Protocol Specification

AUTOSAR FO Release 1.3.0

4.2.2 Request/Response Communication . . . . . . . . . . . . . . 49

4.2.3 Fire&Forget Communication . . . . . . . . . . . . . . . . . . 50

4.2.4 Notification Events . . . . . . . . . . . . . . . . . . . . . . . . 51

4.2.4.1 Strategy for sending notifications . . . . . . . . . . . 52

4.2.5 Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.2.6 Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4.2.6.1 Return Code . . . . . . . . . . . . . . . . . . . . . . 54

4.2.6.2 Error Message . . . . . . . . . . . . . . . . . . . . . 54

4.2.6.3 Error Processing Overview . . . . . . . . . . . . . . 55

4.2.6.4 Communication Errors and Handling of Communica-

tion Errors . . . . . . . . . . . . . . . . . . . . . . . . 57

4.3 Compatibility Rules for Interface Version . . . . . . . . . . . . . . . . . 57

5 Configuration Parameters 61

6 Protocol usage and guidelines 62

6.1 Choosing the transport protocol . . . . . . . . . . . . . . . . . . . . . . 62

6.2 Transporting CAN and FlexRay Frames . . . . . . . . . . . . . . . . . . 62

6.3 Insert Padding for structs . . . . . . . . . . . . . . . . . . . . . . . . . . 63

7 References 64

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— AUTOSAR CONFIDENTIAL —

Document ID 696: AUTOSAR_PRS_SOMEIPProtocol

SOME/IP Protocol Specification

AUTOSAR FO Release 1.3.0

1 Introduction and overview

This protocol specification specifies the format, message sequences and seman-

tics of the AUTOSAR Protocol "Scalable service-Oriented MiddlewarE over IP

(SOME/IP)".

SOME/IP is an automotive/embedded communication protocol which supports remote

procedure calls, event notifications and the underlying serialization/wire format. The

only valid abbreviation is SOME/IP. Other abbreviations (e.g. Some/IP) are wrong and

shall not be used.

1.1 Protocol purpose and objectives

The basic motivation to specify "Yet another RPC-Mechanism" instead of using an

existing infrastructure/technology is the goal to have a technology that:

• Fulfills the hard requirements regarding resource consumption in an embedded

world

• Is compatible through as many use-cases and communication partners as possi-

ble

• compatible with AUTOSAR at least on the wire-format level; i.e. can commu-

nicate with PDUs AUTOSAR can receive and send without modification to the

AUTOSAR standard. The mappings within AUTOSAR shall be chosen according

to the SOME/IP specification.

• Provides the features required by automotive use-cases

• Is scalable from tiny to large platforms

1.2 Applicability of the protocol

SOME/IP shall be implemented on different operating system (i.e. AUTOSAR, GENIVI,

and OSEK) and even embedded devices without operating system. SOME/IP shall be

used for inter-ECU Client/Server Serialization. An implementation of SOME/IP allows

AUTOSAR to parse the RPC PDUs and transport the signals to the application.

1.2.1 Constraints and assumptions

This document specifies the SOME/IP protocol on networ k level. It was created during

elaboration of the AUTOSAR Foundation Standard 1.0.0 which took place in parallel

to the development of the AUTOSAR Classic Standard 4.3.0. It already reflects all

changes implied to SOME/IP by the work which was done for AUTOSAR Classic

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— AUTOSAR CONFIDENTIAL —

Document ID 696: AUTOSAR_PRS_SOMEIPProtocol

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