From 2d9dfa3b1b16ab3b4c83b24550757931656053d2 Mon Sep 17 00:00:00 2001
From: Florian Eckert <fe@dev.tdt.de>
Date: Fri, 4 May 2018 15:28:54 +0200
Subject: [PATCH] net/mwan3: add/remove src_ip from routing table

Add or remove local_source ip also if mwan3 is stopped or started

Signed-off-by: Florian Eckert <fe@dev.tdt.de>
---
 net/mwan3/files/usr/sbin/mwan3 | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/net/mwan3/files/usr/sbin/mwan3 b/net/mwan3/files/usr/sbin/mwan3
index 5089630ed..681f82de3 100755
--- a/net/mwan3/files/usr/sbin/mwan3
+++ b/net/mwan3/files/usr/sbin/mwan3
@@ -118,7 +118,7 @@ status()
 
 start()
 {
-	local enabled
+	local enabled src_ip local_source
 
 	config_load mwan3
 	config_get_bool enabled globals 'enabled' 0
@@ -127,12 +127,30 @@ start()
 		exit 0
 	}
 
+	config_get local_source globals local_source 'none'
+	[ "${local_source}" = "none" ] || {
+		src_ip=$(uci_get_state mwan3 globals src_ip)
+		[ "${src_ip}" != "" ] && {
+			ip route del default via "${src_ip}" dev lo 1>/dev/null 2>&1
+			ip addr del "${src_ip}/32" dev lo 1>/dev/null 2>&1
+		}
+
+		network_get_ipaddr src_ip "${local_source}"
+		if [ "${src_ip}" = "" ]; then
+			$LOG warn "Unable to set source ip for own initiated traffic (${local_source})"
+		else
+			ip addr add "${src_ip}/32" dev lo
+			ip route add default via "${src_ip}" dev lo
+			uci_toggle_state mwan3 globals src_ip "${src_ip}"
+		fi
+	}
+
 	config_foreach ifup interface
 }
 
 stop()
 {
-	local ipset route rule table IP IPT pid
+	local ipset route rule table IP IPT pid src_ip
 
 	for pid in $(pgrep -f "mwan3track"); do
 		kill -TERM "$pid" > /dev/null 2>&1
@@ -178,6 +196,12 @@ stop()
 
 	mwan3_lock_clean
 	rm -rf $MWAN3_STATUS_DIR $MWAN3TRACK_STATUS_DIR
+
+	src_ip=$(uci_get_state mwan3 globals src_ip)
+	[ "${src_ip}" = "" ] || {
+		ip route del default via "${src_ip}" dev lo 1>/dev/null 2>&1
+		ip addr del "${src_ip}/32" dev lo 1>/dev/null 2>&1
+	}
 }
 
 restart() {