From 78467d27ff1b397e979633c8413d67b63372ac48 Mon Sep 17 00:00:00 2001
From: alarig <alarig@swordarmor.fr>
Date: Fri, 25 Jan 2019 13:45:25 +0100
Subject: [PATCH] Reinsert IPv4 in case of failure

---
 creationRoutesVM.sh | 46 ++++++++++++++++++++++++++++-----------------
 1 file changed, 29 insertions(+), 17 deletions(-)

diff --git a/creationRoutesVM.sh b/creationRoutesVM.sh
index b8b2e73..21b2d66 100755
--- a/creationRoutesVM.sh
+++ b/creationRoutesVM.sh
@@ -20,6 +20,30 @@ write_log() {
 	fi
 }
 
+add_ipv4_route(){
+	VM_IPV4=$1
+	IFACE=$2
+	MAC=$3
+
+	# Ajout de la route associée
+	COMMAND="ip -4 route add ${VM_IPV4}/32 dev ${IFACE}"
+	echo "${COMMAND}"
+	write_log INFO "${COMMAND}"
+	${COMMAND}
+
+	# Updating ARP
+	COMMAND="ip neigh add ${VM_IPV4} lladdr ${MAC} dev ${IFACE}"
+	echo "${COMMAND}"
+	write_log INFO "${COMMAND}"
+	${COMMAND}
+
+	# If the previous command fails, it’s because trafic has
+	# already be sent to the VM
+	if [ $? = 2 ]; then
+		ip neigh replace ${VM_IPV4} lladdr ${MAC} dev ${IFACE}
+	fi
+}
+
 # IPAM creds
 CREDS_FILE='/usr/local/etc/proxmox-routing/creds'
 if [ -f $CREDS_FILE ]; then
@@ -183,23 +207,11 @@ for ID_RANGE_V4 in ${ID_RANGES_V4}; do
 
 	# Si la valeur n'est pas vide et correspond à une IPV4
 	if [ -n "${VM_IPV4}" ]; then
-		# Ajout de la route associée
-		COMMAND="ip -4 route add ${VM_IPV4}/32 dev ${IFACE}"
-		echo "${COMMAND}"
-		write_log INFO "${COMMAND}"
-		${COMMAND}
-
-		# Updating ARP
-		COMMAND="ip neigh add ${VM_IPV4} lladdr ${MAC} dev ${IFACE}"
-		echo "${COMMAND}"
-		write_log INFO "${COMMAND}"
-		${COMMAND}
-
-		# If the previous command fails, it’s because trafic has
-		# already be sent to the VM
-		if [ $? = 2 ]; then
-			ip neigh replace ${VM_IPV4} lladdr ${MAC} dev ${IFACE}
-		fi
+		add_ipv4_route ${VM_IPV4} ${IFACE} ${MAC}
+		while [ "$( ip route sh dev ${IFACE})" = "" ]; do
+			add_ipv4_route ${VM_IPV4} ${IFACE} ${MAC}
+			sleep 1
+		done
 
 		GW_IPv4=$(jq -r ".data[] | select(.is_gateway==\"1\") | .ip" ${CHEMIN_CACHE}/${ID_RANGE_V4})
 	else