Send ICMP to update ARP/NDP target’s cache

creationRoutesVM.sh

@@ -194,6 +194,8 @@ for ID_RANGE_V4 in ${ID_RANGES_V4}; do
 		if [ $? = 2 ]; then
 			ip neigh replace ${VM_IPV4} lladdr ${MAC} dev ${IFACE}
 		fi
+
+		GW_IPv4=$(jq -r ".data[] | select(.is_gateway==\"1\") | .ip" ${CHEMIN_CACHE}/${ID_RANGE_V4})
 	else
 		# En cas d'echec, on continue de parcourir les autres RANGES
 		write_log WARN 'Empty value or doen’t correspond to an IPv4'
@@ -237,11 +239,16 @@ for ID_RANGE_V6 in ${ID_RANGES_V6}; do
 		if [ $? = 2 ]; then
 			ip neigh replace ${VM_NH} lladdr ${MAC} dev ${IFACE}
 		fi
+
+		GW_IPv6="fe80::204:92:100:1"
 	else
 		# En cas d'echec, on continue de parcourir les autres RANGES
 		echo "Valeur vide ou ne correspond pas à un range IPV6"
 	fi
 done
 
+# Send ICMP to update ARP/NDP cache
+send-icmp.py ${MAC} ${IFACE} ${VM_IPV4} ${GW_IPv4} ${VM_NH} ${GW_IPv6}
+
 write_log INFO 'Script ended'
 exit 0

send-icmp.py

@@ -0,0 +1,18 @@
+#!/usr/bin/python3
+
+from scapy.all import *
+
+etherDest=  sys.argv[1]
+iface=      sys.argv[2]
+
+ipDest=     sys.argv[3]
+ipSrc=      sys.argv[4]
+
+# send 10 IPv4 ICMP echo requests
+sendp(Ether(dst=etherDest)/IP(dst=ipDest, src=ipSrc, ttl=(1,10))/ICMP(), iface=iface)
+
+ipDest=     sys.argv[5]
+ipSrc=      sys.argv[6]
+
+# send 10 IPv6 ICMP echo requests
+sendp(Ether(dst=etherDest)/IPv6(dst=ipDest, src=ipSrc, hlim=(1,10))/ICMPv6EchoRequest(), iface=iface)