ndp: don't scan netlink attributes in case of netlink route event

In case a netlink route event is received for a default route
netlink data attributes were faulty processed as neigbor netlink
data. Fix this by not processing any netlink attribute for
any route event.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/src/ndp.c b/src/ndp.c
index 95eb18f..f9e0405 100644
--- a/src/ndp.c
+++ b/src/ndp.c
@@ -358,11 +358,13 @@ static void handle_rtnetlink(_unused void *addr, void *data, size_t len,
 				|| ndm->ndm_family != AF_INET6)
 			continue;
 
-		// Inform about a change in default route
-		if (is_route && rtm->rtm_dst_len == 0)
-			raise(SIGUSR1);
-		else if (is_route)
+		if (is_route) {
+			// Inform about a change in default route
+			if (rtm->rtm_dst_len == 0)
+				raise(SIGUSR1);
+
 			continue;
+		}
 
 		// Data to retrieve
 		size_t rta_offset = (is_addr) ?	sizeof(struct ifaddrmsg) : sizeof(*ndm);