[6bed4-devel] [PATCH] router: Allow traffic to the routers ipv6 address

[<ebi...@xm...>]

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