#!/bin/sh
# SPDX-License-Identifier: GPL-3.0-only
#
# Netmon Nodewatcher (C) 2010-2012 Freifunk Oldenburg

debug() {
	(>&2 echo "nodewatcher: $1")
}

debug "Collecting information from batman advanced and its interfaces"

if [ -f /sys/module/batman_adv/version ]; then
	for iface in $(batctl if | sed 's/ //'); do
		status=${iface##*:}
		iface=${iface%%:*}
		BATMAN_ADV_INTERFACES=$BATMAN_ADV_INTERFACES"<$iface><name>$iface</name><status>$status</status></$iface>"
	done

	echo -n "<batman_adv_interfaces>$BATMAN_ADV_INTERFACES</batman_adv_interfaces>"

	# Build a list of direct neighbors
	batman_adv_originators=$(/usr/sbin/batctl o -H | awk \
		'BEGIN { FS=" "; i=0 } # set the delimiter to " "
		{   sub("\\(", "", $0) # remove parentheses
			sub("\\)", "", $0)
			sub("\\[", "", $0)
			sub("\\]", "", $0)
			sub("\\*", "", $0)
			sub("  ", " ", $0)
			o=$1".*"$1 # build a regex to find lines that contains the $1 (=originator) twice
			if ($0 ~ o) # filter for this regex (will remove entries without direct neighbor)
			{
				printf "<originator_"i"><originator>"$1"</originator><link_quality>"$3"</link_quality><nexthop>"$4"</nexthop><last_seen>"$2"</last_seen><outgoing_interface>"$5"</outgoing_interface></originator_"i">"
				i++
			}
		}')

	echo -n "<batman_adv_originators>$batman_adv_originators</batman_adv_originators>"

	echo -n "<batman_adv_gateway_mode>$(/usr/sbin/batctl gw)</batman_adv_gateway_mode>"

	batman_adv_gateway_list=$(/usr/sbin/batctl gwl -H | awk \
		'BEGIN { FS=" "; i=0 }
		/No gateways/ { next }
		{   sub("\\(", "", $0)
			sub("\\)", "", $0)
			sub("\\[ *", "", $0)
			sub("\\]:", "", $0)
			sub("\\* ", "true ", $0)
			sub("  ", "false ", $0)
			printf "<gateway_"i"><selected>"$1"</selected><gateway>"$2"</gateway><link_quality>"$3"</link_quality><nexthop>"$4"</nexthop><outgoing_interface>"$5"</outgoing_interface><gw_class>"$6" "$7" "$8"</gw_class></gateway_"i">"
			i++
		}')

	echo -n "<batman_adv_gateway_list>$batman_adv_gateway_list</batman_adv_gateway_list>"
else
	debug "No batman data .."
	exit 1
fi

exit 0