Messages in this thread | | | Subject | Re: Testing wanted for Linux NFC subsystem | From | Vincent Knecht <> | Date | Tue, 18 May 2021 21:18:56 +0200 |
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Le vendredi 14 mai 2021 à 08:23 -0700, Mark Greer a écrit : > On Thu, May 13, 2021 at 05:37:19PM +0200, Stephan Gerhold wrote: > > On Thu, May 13, 2021 at 07:48:55AM -0700, Mark Greer wrote: > > > On Thu, May 13, 2021 at 01:49:53PM +0200, Stephan Gerhold wrote: > > > > I have a couple of "recycled" smartphones running mainline Linux > > > > and some of them do have NFC chips. I have two with NXP PN547 > > > > (supported by nxp,nxp-nci-i2c), one with Samsung S3FWRN5 > > > > (samsung,s3fwrn5-i2c) and even one with Broadcom BCM2079x I think > > > > (this one does not have a driver for the Linux NFC subsystem sadly). > > > > > > > > +Cc phone-devel@vger.kernel.org, in case other people there are > > > > interested in NFC :) > > > > > > > > The NXP/Samsung ones seems to work just fine. However, since there are > > > > barely any userspace tools making use of Linux NFC all my testing so far > > > > was limited to polling for devices with "nfctool" and being happy enough > > > > when it realizes that I hold some NFC tag close to the device. :S > > > > > > There is a user-level daemon that is the counterpart for the in-kernel > > > NFC subsystem. It is called neard and is available here: > > > > > > git://git.kernel.org/pub/scm/network/nfc/neard.git > > > > > > There are a few test script in it that will let you read and write NFC > > > tags, and do some other things. We can add some more tests to that set > > > as we go. > > > > > > > Yeah, I packaged that for Alpine Linux / postmarketOS. > > "nfctool" also comes from "neard" as far as I can tell :) > > > > I think I also played with the Neard test scripts a bit at some point, > > and managed to read some NFC tag thing inside an old Yubikey NEO > > that I found, but didn't really know what else to do. > > Yeah, there isn't a whole lot you can do but beyond reading/writing > tags and peer-to-peer, there are things like Bluetooth and Wifi > handover, Android Application Record support, and at least some > support for Secure Engine.
Could sniffing and injection work, like for wifi ? Guess that depends on specific chip drivers, and libpcap support for sniffing ?
https://wiki.wireshark.org/SampleCaptures#Radio_Frequency_Identification_.28RFID.29.2C_and_Near-Field_Communication_.28NFC.29
https://code.google.com/archive/p/wireshark-nfc/
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