# -*- tab-width: 4 -*- ;; Emacs
# vi: set filetype=sh tabstop=8 shiftwidth=8 noexpandtab :: Vi/ViM
############################################################ IDENT(1)
#
# $Title: dwatch(8) module for dtrace_ip(4) $
# $Copyright: 2014-2018 Devin Teske. All rights reserved. $
#
############################################################ DESCRIPTION
#
# Display interface name and bytes sent/received when IP I/O occurs
#
############################################################ PROBE

case "$PROFILE" in
ip) : ${PROBE:=ip:::send, ip:::receive} ;;
 *) : ${PROBE:=ip:::${PROFILE#ip-}}
esac

############################################################ ACTIONS

exec 9<<EOF
this string	flow;
this string	if_name;
this string	local;
this string	remote;
this u_char	recv;
this uint32_t	length;

$PROBE /* probe ID $ID */
{${TRACE:+
	printf("<$ID>");
}
	/*
	 * dtrace_ip(4)
	 */
	this->recv = probename == "receive" ? 1 : 0;
	this->flow = this->recv ? "<-" : "->";

	/*
	 * ipinfo_t *
	 */
	this->length = (uint32_t)args[2]->ip_plength;
	this->local  = this->recv ? args[2]->ip_daddr : args[2]->ip_saddr;
	this->remote = this->recv ? args[2]->ip_saddr : args[2]->ip_daddr;

	/*
	 * ifinfo_t *
	 */
	this->if_name = args[3]->if_name;
}
EOF
ACTIONS=$( cat <&9 )
ID=$(( $ID + 1 ))

############################################################ EVENT DETAILS

if [ ! "$CUSTOM_DETAILS" ]; then
exec 9<<EOF
	/*
	 * Print network I/O details
	 */
	printf("%s %s %s %s %u byte%s",
		this->if_name,
		this->local,
		this->flow,
		this->remote,
		this->length,
		this->length == 1 ? "" : "s");
EOF
EVENT_DETAILS=$( cat <&9 )
fi

################################################################################
# END
################################################################################