Timo Müller NFC AND THE VEHICLE. TESTING THE LINUX NFC STACK. BMW Car IT GmbH

Transcription

1 Timo Müller NFC AND THE VEHICLE. TESTING THE LINUX NFC STACK. BMW Car IT GmbH

2 NEARD FIELD COMMUNICATION. WHAT IS IT? Easy connections, quick transactions, and simple data sharing. NFC-Forum.org Fast connection setup Contactless Short range Communication with passive and active devices or tags Compatible with RFID Page 2

3 NFC AND THE VEHICLE. WHAT TO DO WITH NFC IN THE CAR? Connect Bluetooth and Wireless Devices by a single touch Touch the car to unlock or start Transfer data like navigation destinations or contacts Wireless charging Page 3

4 NFC AND GENIVI. HOW ABOUT COMPLIANCE? APIs of a NFC stack are defined in GENIVI Part of the GENIVI compliance since release 5.0 (07. Oct 2013) NFC kernel subsystem and neard are GENIVI compliant Page 4

5 LINUX NFC. GENERAL CAPABILITIES. Reading and Writing Tags Card Emulation Peer-to-Peer Connections (LLCP-based Transports) Handover with Bluetooth and WiFI Supported Hardware: NXP pn544, pn533, pn532 TI nfcwilink IS microread Page 5

6 LINUX NFC. TRANSFERING DATA. Simple NDEF Exchange Protocol (SNEP) NDEF Push Protocol (NPP) Personel Health Device Communication (PHDC) Page 6

7 LINUX NFC. CONNECTION HANDOVER. Establish a Bluetooth or WiFi connection By touching a device (Negotiated Handover) By touching a tag (Static Handover) Page 7

8 LINUX NFC. SECURE ELEMENT API. Released with Kernel Release 3.13 Netlink API for Discovering attached Secure Elements Enabling and Disabling of Secure Elements Currently only supported by the pn455 Secure Element Daemon with D-Bus APIs will be part of neard Page 8

9 LINUX NFC. GENERAL ARCHITECTURE. Application Application D-Bus API neard User space Kernel space NFC Netlink AF_NFC Sockets NFC Core NFC Drivers NFC Hardware Source: Page 9

10 LINUX NFC. D-BUS API. NFC Application (NDEF agent) ConnMan (Handover agent) agent manager / BlueZ (Handover agent) adapter /nfc0 tag /nfc0/tag0 device /nfc0/device0 record /nfc0/tag0/record0 record /nfc0/device0/record0 Source: Page 10

11 LINUX NFC. LET'S GO FOR A SPIN. Page 11

12 LINUX NFC. KERNEL ARCHITECTURE. Netlink socket PROTO_LLCP LLCP PROTO_RAW AF_NFC NFC Core HCI NCI pn533 SHDLC wilink µread pn544 Source: Page 12

13 TESTING THE LINUX NFC STACK. MANUAL TESTING. Python test scripts for Connection Handover PHDC Manager SNEP Agent Communication via D-Bus APIs Monitor Traffic with nfctool and monitor-near Page 13

14 TESTING THE LINUX NFC STACK. USING THE LOOPBACK DEVICE. NFC_SIM Kernel Driver Two virtual NFC Devices are created that act as loopback devices Test Application 1 Test Application 2 neard Peer-to-Peer Connections can be tested. NFC Core vnfc Device 1 vnfc Device 2 NFC-DEP Page 14

15 TESTING THE LINUX NFC STACK. WHAT'S MISSING? Testing NFC R/W Interface Test Application Testing Card Emulation Modes neard NFC Core vnfc Device ISO-DEP (Listen) Test Tag ISO-DEP (Poll) Tag Type 1-4 Test Device (Card Emulation) Page 15

16 PROPOSAL FOR TESTING WITHOUT HARDWARE. NFC CONTROLLER INTERFACE. NFC Forum Device NCI NFCEE Interface RF Interface Control Device Host NFCEE Protocol NFC Exection Environment RF Protocol NFC Controller Remote NFC Interface Source: NFCFourm-TS-NFC Page 16

17 PROPOSAL FOR TESTING WITHOUT HARDWARE. A VIRTUAL NFC CONTROLLER. Create a complete virtual NCI Device Emulate NCI Data Packets based on RF Protocols Tag Type 1-4 ISO-DEP (Poll and Listen) NFC-DEP Page 17

18 NFC OVER SOMEIP. VIRTUAL NFC CONTROLLER AND REAL HARDWARE. NFC Reader is somewhere in the vehicle connected to an ECU Head-Unit NFC Reader ECU allows opening or starting the car when the Head-Unit is off Remaining NFC functionality is handled by the Head-Unit Application neard CAN/LIN/MOST NFC Core ECU vnci Device SOMEIP Page 18

19 NFC OVER SOMEIP. VIRTUAL NFC CONTROLLER AND REAL HARDWARE. Send NCI control and data packets over SOMEIP Head-Unit ECU Daemon Expose the virtual NCI device as a virtual networking adapter Application neard Route the IP packets containing NCI data via iptables or nftables NFC Core vnci Device SOMEIP Page 19

20 THANK YOU VERY MUCH FOR YOUR INTEREST. Page 20

21 RESOURCES. 01.org/linux-nfc nfc-next: git://git.kernel.org/pub/scm/linux/kernel/git/sameo/nfc-next.git neard: git://git.kernel.org/pub/scm/network/nfc/neard.git Samuel Ortiz: The Linux NFC subsystem, 2013 NFCForum-TS-NCI-1.0: NFC Controller Interface (NCI) Specification, V1.0 November Samuel Ortiz: Mobile Payments with Linux, Page 21