From 7139f0150bfd006ab76b64a0aefbf2de2fc35443 Mon Sep 17 00:00:00 2001
From: Robin Jarry <robin.jarry@6wind.com>
Date: Mon, 9 Jan 2017 13:59:58 +0100
Subject: [PATCH] layers/inet6/routes: fix ndp resolution without default route
Sending a IPv6 packet without Ether.dst mac defined fails when there is
not default IPv6 route defined with the following message:
WARNING: No route found for IPv6 destination fd00:200::1 (no default route?)
Because, when there is no default IPv6 route defined, conf.iface6 is
initialized to the loopback interface and the conf.route6.route() method
is called with dev=conf.iface6.
According to the docstring of conf.route6.route():
if optional 'dev' parameter is provided a specific interface,
filtering is performed to limit search to route associated to
that interface.
This will result in the system never finding on which interface it
should send a NDP packet.
Do not call conf.route6.route() with dev=conf.iface6.
Signed-off-by: Samuel Gauthier <samuel.gauthier@6wind.com>
Signed-off-by: Robin Jarry <robin.jarry@6wind.com>
---
scapy/layers/inet6.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scapy/layers/inet6.py b/scapy/layers/inet6.py
index 385d4712..b5cba9c7 100644
--- a/scapy/layers/inet6.py
+++ b/scapy/layers/inet6.py
@@ -106,7 +106,7 @@ def getmacbyip6(ip6, chainCC=0):
mac = in6_getnsmac(inet_pton(socket.AF_INET6, ip6))
return mac
- iff,a,nh = conf.route6.route(ip6, dev=conf.iface6)
+ iff,a,nh = conf.route6.route(ip6)
if iff == LOOPBACK_NAME:
return "ff:ff:ff:ff:ff:ff"
--
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