// Copyright (C) 2005, 2006 IBM Corp.
//
// This file is part of systemtap, and is free software.  You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version

%{
#include <linux/netdevice.h>
%}

probe addevent.netdev
	= addevent.netdev.receive,
	addevent.netdev.transmit
{}

/* Main device receive routine, be called when packet arrives on network device */
probe addevent.netdev.receive
	+= _addevent.netdev.receive
{
	update_record()
}

probe _addevent.netdev.receive
	=  netdev.receive
{
	/* no need to filter by pid */
	log_netdev_extra(HOOKID_NETDEV_RECEIVE, dev_name, length, protocol, truesize)
}

/* Queue a buffer for transmission to a network device */
probe addevent.netdev.transmit
	+= _addevent.netdev.transmit
{
	update_record()
}

probe _addevent.netdev.transmit
	=  netdev.transmit
{
	log_netdev_extra(HOOKID_NETDEV_TRANSMIT, dev_name, length, protocol, truesize)
}

function log_netdev_extra(var_id:long, dev_name:string, len:long, 
			protocol:long, truesize:long)
%{

	/* dev_name | Length of actual data | protocol | Buffer size 

	    skb->protocol is:
		0800    IP
		8100    802.1Q VLAN
		0001    802.3
		0002    AX.25
		0004    802.2
		8035    RARP
		0005    SNAP
		0805    X.25
		0806    ARP
		8137    IPX
		0009    Localtalk
		86DD    IPv6
	*/

	_lket_trace(_GROUP_NETDEV, THIS->var_id, "%0s%4b%2b%4b", THIS->dev_name,
		THIS->len, THIS->protocol, THIS->truesize);
%}