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Send ICMP to update ARP/NDP target’s cache

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This commit is contained in:
Alarig Le Lay 2019-01-24 18:02:59 +01:00
parent 52dc461d28
commit 833a06ce8d
2 changed files with 25 additions and 0 deletions
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7
creationRoutesVM.sh
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@ -194,6 +194,8 @@ for ID_RANGE_V4 in ${ID_RANGES_V4}; do
if [ $? = 2 ]; then if [ $? = 2 ]; then
ip neigh replace ${VM_IPV4} lladdr ${MAC} dev ${IFACE} ip neigh replace ${VM_IPV4} lladdr ${MAC} dev ${IFACE}
fi fi
GW_IPv4=$(jq -r ".data[] | select(.is_gateway==\"1\") | .ip" ${CHEMIN_CACHE}/${ID_RANGE_V4})
else else
# En cas d'echec, on continue de parcourir les autres RANGES # En cas d'echec, on continue de parcourir les autres RANGES
write_log WARN 'Empty value or doen’t correspond to an IPv4' 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 if [ $? = 2 ]; then
ip neigh replace ${VM_NH} lladdr ${MAC} dev ${IFACE} ip neigh replace ${VM_NH} lladdr ${MAC} dev ${IFACE}
fi fi
GW_IPv6="fe80::204:92:100:1"
else else
# En cas d'echec, on continue de parcourir les autres RANGES # En cas d'echec, on continue de parcourir les autres RANGES
echo "Valeur vide ou ne correspond pas à un range IPV6" echo "Valeur vide ou ne correspond pas à un range IPV6"
fi fi
done 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' write_log INFO 'Script ended'
exit 0 exit 0

18
send-icmp.py Executable file
View file

@ -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)