lib/in46_addr: Avoid ASSERT() when in46a_ntop() is called on uninitialized address

Change-Id: I42d41ec1370b9cc15d372b649d8e1bc78e76af9b

1 files changed, 8 insertions, 1 deletions

diff --git a/lib/in46_addr.c b/lib/in46_addr.c
index 6864c64..4b5fd64 100644
--- a/lib/in46_addr.c
+++ b/lib/in46_addr.c
@@ -62,7 +62,14 @@ int in46a_to_sas(struct sockaddr_storage *out, const struct in46_addr *in)
 /*! Convenience wrapper around inet_ntop() for \ref in46_addr */
 const char *in46a_ntop(const struct in46_addr *in, char *dst, socklen_t dst_size)
 {
-	int af = in46a_to_af(in);
+	int af;
+
+	if (!in || in->len == 0) {
+		strncpy(dst, "UNDEFINED", dst_size);
+		return dst;
+	}
+
+	af = in46a_to_af(in);
 	if (af < 0)
 		return NULL;