From 2bc21aa63f23b1a94f7a23272c4b17feea3a936f Mon Sep 17 00:00:00 2001
From: Christian Dresel <freifunk@dresel.systems>
Date: Tue, 28 Dec 2021 07:50:04 +0100
Subject: [PATCH] fff-layer3: Add latency to nodewatcher
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This patch add the latency to the nodewatcher data.

The target of the ping can configure in /etc/config/fff

Example:

config latency 'latency'
	option ipv4 'ff1.zbau.f3netze.de'
	option ipv6 'ff1.zbau.f3netze.de'

if no target is set, no latency is send.

Signed-off-by: Christian Dresel <freifunk@dresel.systems>
Acked-by: Fabian Bläse <fabian@blaese.de>
---
 .../files/usr/lib/nodewatcher.d/90-latency.sh | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100755 src/packages/fff/fff-layer3/files/usr/lib/nodewatcher.d/90-latency.sh

diff --git a/src/packages/fff/fff-layer3/files/usr/lib/nodewatcher.d/90-latency.sh b/src/packages/fff/fff-layer3/files/usr/lib/nodewatcher.d/90-latency.sh
new file mode 100755
index 00000000..1011235d
--- /dev/null
+++ b/src/packages/fff/fff-layer3/files/usr/lib/nodewatcher.d/90-latency.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+ipv4dest=$(uci -q get fff.latency.ipv4)
+ipv6dest=$(uci -q get fff.latency.ipv6)
+if [ -n "$ipv4dest" ] || [ -n "$ipv6dest" ] ; then
+        printf "<latency>"
+
+        if [ -n "$ipv4dest" ] ; then
+                ipv4latency=$(ping -qc3 -4 $ipv4dest 2>&1 | awk -F'/' 'END{ print (/^round-trip/? $4:"0") }')
+                printf "<ipv4latency>$ipv4latency</ipv4latency><ipv4dest>$ipv4dest</ipv4dest>"
+        fi
+
+        if [ -n "$ipv6dest" ] ; then
+                ipv6latency=$(ping -qc3 -6 $ipv6dest 2>&1 | awk -F'/' 'END{ print (/^round-trip/? $4:"0") }')
+                printf "<ipv6latency>$ipv6latency</ipv6latency><ipv6dest>$ipv6dest</ipv6dest>"
+        fi
+
+        printf "</latency>"
+fi
+exit 0