Don't hairpin traffic to the routers interfaceid.
Signed-off-by: Eric W. Biederman <ebi...@xm...>
---
router.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/router.c b/router.c
index c12ee88..e7ab764 100644
--- a/router.c
+++ b/router.c
@@ -340,6 +340,10 @@ static inline bool prefix_6bed4 (struct in6_addr *ip6) {
return memcmp (&v6listen, ip6->s6_addr, 8) == 0;
}
+static inline bool router_interfaceid(struct in6_addr *ip6) {
+ return ip6->s6_addr[10] == 0 && ip6->s6_addr[13] == 0 &&
+ ip6->s6_addr[14] == 0 && ip6->s6_addr[15] == 0;
+};
/*
* Validate the originator's IPv6 address. It should match the
@@ -568,7 +572,7 @@ void handle_4to6 (void) {
if (v4v6hoplimit-- <= 1) {
return;
}
- if (prefix_6bed4 (v4dst6)) {
+ if (prefix_6bed4 (v4dst6) && !router_interfaceid(v4dst6)) {
relay_6bed4_plain_unicast (v4data, buflen, v4dst6);
} else {
handle_4to6_plain_unicast (buflen);
--
1.7.5.4
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