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nfc-relay-picc(1)		 NFC Utilities		     nfc-relay-picc(1)

NAME
       nfc-relay-picc -	Relay demonstration tool for ISO14443-4

SYNOPSIS
       nfc-relay-picc

DESCRIPTION
       nfc-relay-picc

       This  tool  requires two	NFC devices. One device	(configured as target)
       will emulate an ISO/IEC 14443-4 type A tag,  while  the	second	device
       (configured  as initiator) will act as a	reader.	The genuine tag	can be
       placed on the second device (initiator) and the tag  emulator  (target)
       can  be	placed	close to the original reader. All communication	is now
       relayed and shown in the	screen on real-time.

       tag <---> initiator (relay) <---> target	(relay)	<---> original reader

OPTIONS
       -h
	   Help
	   List	options

       -q
	   Quiet mode
	   Suppress printing of	relayed	data (improves timing)

       -t
	   Target mode only (to	be used	on reader side)
	   Commands are	sent to	file descriptor	4
	   Responses are read from file	descriptor 3

       -i
	   Initiator mode only (to be used on tag side)
	   Commands are	read from file descriptor 3
	   Responses are sent to file descriptor 4

       -s
	   Swap	roles of found devices
	   Usually the first found device is used as target (emulator) and the
       second
	   as initiator	(reader). Using	this option these roles	are inversed.

       -n N
	   Adds	a waiting time of N seconds (integer) in the loop

EXAMPLES
       Basic usage:

	 nfc-relay-picc

       Remote relay over TCP/IP:

	 socat
	   TCP-LISTEN:port,reuseaddr
	   "EXEC:nfc-relay-picc	-i,fdin=3,fdout=4"
	 socat
	   TCP:remotehost:port
	   "EXEC:nfc-relay-picc	-t,fdin=3,fdout=4"

NOTES
       There are some differences with nfc-relay:

       This example only works with PN532 because it relies  on	 its  internal
       handling	of ISO14443-4 specificities.

       Thanks  to this internal	handling & injection of	WTX frames, this exam-
       ple works on readers very strict	on timing.

BUGS
       Please report any bugs on the libnfc issue tracker at:
       https://github.com/nfc-tools/libnfc/issues

LICENCE
       libnfc is licensed under	the GNU	Lesser General Public License  (LGPL),
       version 3.
       libnfc-utils  and  libnfc-examples  are covered by the the BSD 2-Clause
       license.

       This manual page	is licensed under the terms of the GNU GPL (version  2
       or later).

libnfc			       October 12, 2010		     nfc-relay-picc(1)

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