freebsd man page for l2ping

L2PING(8)						    BSD System Manager's Manual 						 L2PING(8)

NAME
     l2ping -- send L2CAP ECHO_REQUEST to remote devices

SYNOPSIS
     l2ping [-fhn] -a remote [-c count] [-i wait] [-S source] [-s size]

DESCRIPTION
     The l2ping utility uses L2CAP ECHO_REQUEST datagram to elicit an L2CAP ECHO_RESPONSE datagram from a remote device.

     The options are as follows:

     -a remote
	     Specify the remote device to ping.  The remote device can be specified by either its BD_ADDR or name.  If name was specified then the
	     l2ping utility will attempt to resolve the name via bt_gethostbyname(3).

     -c count
	     Number of packets to send.  If this option is not specified, l2ping will operate until interrupted.

     -f      Do not wait between sending each packet.

     -h      Display usage message and exit.

     -i wait
	     Wait wait seconds between sending each packet.  The default is to wait for one second between each packet.  This option is ignored if
	     -f has been specified.

     -n      Numeric output only.  No attempt will be made to look up symbolic names for host addresses.

     -S source
	     Specify the local device which should be used to send L2CAP ECHO_REQUEST datagrams.  The local device can be specified by either its
	     BD_ADDR or name.  If name was specified then the l2ping utility will attempt to resolve the name via bt_gethostbyname(3).

     -s size
	     Specify the number of payload bytes to be sent.  The default size is 44 bytes.  It is calculated as minimum L2CAP MTU (48 bytes)
	     minus the size of the L2CAP signalling command header (4 bytes).  The maximum size is 65531 bytes.  Is is calculated as maximum L2CAP
	     MTU (65535 bytes) minus four bytes of payload reserved for l2ping internal use.  Use this option with caution.  Some implementations
	     may not like large sizes and may hang or even crash.

EXIT STATUS
     The l2ping utility exits 0 on success, and >0 if an error occurs.

SEE ALSO
     bluetooth(3), netgraph(3), netgraph(4), ng_l2cap(4), l2control(8)

AUTHORS
     Maksim Yevmenkin <emax@FreeBSD.org>

BUGS
     Could collect more statistic.  Could check for duplicated, corrupted and lost packets.

BSD
								  March 29, 2011							       BSD