iup

commit 4b2c422417c480b55ea98c4303f82e2947fd90b1
Author: lash <dev@holbrook.no>
Date:   Fri, 14 Jan 2022 08:18:14 +0000

Initial commit

Diffstat:
A
CHANGELOG
 | 
4
++++
A
LICENSE
 | 
14
++++++++++++++
A
VERSION
 | 
1
+
A
iup.service
 | 
10
++++++++++
A
iup.sh
 | 
75
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

5 files changed, 104 insertions(+), 0 deletions(-)
diff --git a/CHANGELOG b/CHANGELOG
@@ -0,0 +1,4 @@
+* 0.1.0
+	- optional host list from config file
+	- customizable delay between ping rounds
+	- three types of detail; VPN, CLEAR or DOWN
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,14 @@
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.
+
diff --git a/VERSION b/VERSION
@@ -0,0 +1 @@
+0.1.0
diff --git a/iup.service b/iup.service
@@ -0,0 +1,10 @@
+[Unit]
+Description=Internet connection poller
+After=multi-user.target
+
+[Service]
+ExecStart=/usr/local/bin/iup.sh
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
diff --git a/iup.sh b/iup.sh
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+f="/run/user/$UID/probe_up"
+df="/run/user/$UID/probe_up_detail"
+rm -f $f
+
+up() {
+	#ip route | awk '{ if (/^default/) c=$5; if (c ~ /^tun/ ) { o="VPN"; c=0; } if ( c ~ /^wlp/ ) { o="CLEAR"; c=0; } } END { print o }'
+	#ip route | awk 'BEGIN { o="CLEAR";} { if ( /^0.0.0.0/ ) { if ($5 ~ /^tun/) { o="VPN"; c=""; } } } END { print o; }' >&3
+	truncate -s0 $df
+	exec 3<>$df
+	r=`ip route | awk 'BEGIN { o="CLEAR";} { if ( $2 ~ dev && $3 ~ /^tun/ ) o="VPN" } END { print o; }'`
+       	echo -e "\033[32m$r\033[39m" >&3
+	exec 3>&-
+	#exit 0
+	if [ ! -f $f ]; then
+		logger -p info "iup up"
+	fi
+	touch $f
+}
+down() {
+	truncate -s0 $df
+	exec 3<>$df
+	echo "DOWN" >&3
+	exec 3>&-
+	#exit 0
+	if [ -f $f ]; then
+		logger -p info "iup down"
+	fi
+	rm -f $f
+}
+
+argh() {
+	logger -p info "iup die"
+	rm -f $f
+	exit 0
+}
+
+IUP_DELAY=${IUP_DELAY:-$1}
+if [ -z $IUP_DELAY ]; then
+	IUP_DELAY=5
+fi
+
+hosts=()
+while read h; do
+	hosts+=($h)
+done < $HOME/.config/iup 2> /dev/null
+if [ ${#hosts[@]} -eq "0" ]; then
+	# use cnn, google as default
+	hosts=(8.8.8.8 151.101.193.67)
+	logger -p warn missing hosts input file, using default: ${hosts[@]}
+fi
+
+logger -p debug iup started with delay $IUP_DELAY hosts ${hosts[@]}
+
+trap argh SIGINT
+trap argh SIGTERM
+trap argh SIGQUIT
+
+while true; do
+	isup=""
+	for h in ${hosts[@]}; do
+		ping -c1 $h -w1 -q &> /dev/null
+		if [ $? -eq '0' ]; then
+			up
+			isup=1
+			#logger -p debug "ping success $h"
+			break
+		fi
+	done
+	if [ -z $isup ]; then
+		down
+	fi
+	sleep $IUP_DELAY
+done