fix a crash when prefix length is not specified

diff --git a/regress/usr.sbin/bgpd/unittests/rde_trie_test.c b/regress/usr.sbin/bgpd/unittests/rde_trie_test.c
index 5b5bc36..623441f 100644 (file)
--- a/regress/usr.sbin/bgpd/unittests/rde_trie_test.c
+++ b/regress/usr.sbin/bgpd/unittests/rde_trie_test.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: rde_trie_test.c,v 1.3 2018/09/10 20:51:59 benno Exp $ */
+/*     $OpenBSD: rde_trie_test.c,v 1.4 2018/09/18 13:55:28 denis Exp $ */
 
 /*
  * Copyright (c) 2018 Claudio Jeker <claudio@openbsd.org>
@@ -76,10 +76,12 @@ host_v6(const char *s, struct bgpd_addr *h, u_int8_t *len, int *orl)
                memcpy(&h->v6, &res->ai_addr->sa_data[6], sizeof(h->v6));
                 freeaddrinfo(res);
                *len = mask;
-               *p = '/';
+               if (p)
+                       *p = '/';
                 return (1);
         }
-       *p = '/';
+       if (p)
+               *p = '/';
 
         return (0);
 }