![Encryption / Codification
High Data Rate AES128-CBC
Low Data Rate AES256-CBC
Bit Masking
1 10 0 0 01 1
ID: 200
RPM_engine[0:2]
ID: 400
RPM_engine[3:7]](https://image.slidesharecdn.com/lama-developmentandtestingofasafetynetworkprotocol-181212212455/85/Alessio-Lama-Development-and-testing-of-a-safety-network-protocol-9-320.jpg)
Alessio Lama - Development and testing of a safety network protocol
- 1. Development and Testing of Safety Network Protocol Alessio Lama alessio.lama@yahoo.it Linkedin 4 December 2018
- 2. Applications ● Automotive ● Industrial automation ● Biomedical ● Avionic ● Interactions with safety MCU ● Real-Time systems
- 3. Issues ● Access Denial ● Repetition ● Loss ● Corruption ● Timeout ● Hacking ● Interface disconnection ● Nondeterministic network ● Net driver bugs
- 4. Access Denial ● Network Topology ● A VLAN is any broadcast domain that is partitioned and isolated in a computer network at the data link layer. # ip link add link eth0 name eth0.8 type vlan id 8 ● Limited access # iptables -A INPUT -i eth1 -m mac --mac-source XX:XX:XX:XX:XX:XX -j ACCEPT
- 5. Polling Protocol ● Unique ID request ● Sequence number ● Signature ● Timestamp ● …...
- 6. Corruption ● CRC detecting random errors and it’s much easier to implement on embedded hardware. ● SHA or MD5 are used for security check and it’s not recommended for real-time systems.
- 7. Interface disconnection ● Periodic supervision packet ● Realignment sequence number
- 8. Timeout ● Master device uses a timer callback to report the timeout response error. ● Check timestamp frame value (PTP)
- 9. Encryption / Codification High Data Rate AES128-CBC Low Data Rate AES256-CBC Bit Masking 1 10 0 0 01 1 ID: 200 RPM_engine[0:2] ID: 400 RPM_engine[3:7]
- 10. Tools : Wireshark Wireshark is a free and open source packet analyzer. It is used for network troubleshooting, analysis, software and communications protocol development, and education.
- 11. Wireshark : Filter and dissector https://wiki.wireshark.org/Lua/Examples
- 12. Wireshark : Filter and dissector https://wiki.wireshark.org/Lua/Examples
- 13. Tools : Scapy Scapy is a powerful interactive packet manipulation program. It is able to forge or decode packets of a wide number of protocols, send them on the wire, capture them, match requests and replies, and much more.
- 14. Tools : Scapy Adding new protocols Show packet
- 15. Test : TTCN-3 TTCN-3 (Testing and Test Control Notation version 3) is a strongly typed testing language used in conformance testing of communicating systems. TTCN-3 has its own data types and can be combined with ASN.1, IDL and XML type definitions
- 16. Test : TTCN-3
- 17. PTP PTP hardware (if supported) and software timestamping to synchronize the clocks of the devices.
- 18. linuxptp Check Driver Support Configuration File
- 19. PRP Parallel Redundancy Protocol is a network protocol standard for Ethernet that provides seamless failover against failure of any network component. This redundancy is invisible to the application. http://processors.wiki.ti.com/index.php/Processor_SDK_Linux_HSR_PRP
- 20. PRP PRP nodes have two ports and are attached to two separated networks of similar topology. PRP can be implemented entirely in software, i.e. integrated in the network driver. DropWindow size depends on the timing.
- 21. Development and Testing of Safety Network Protocol Alessio Lama alessio.lama@yahoo.it Linkedin 4 December 2018