Fix inverted logic in recv_hello().

Bug introduced by rev1.48 two weeks ago. We were not respecting the
advertised transport connection preference (LDPoIPv4 or LDPoIPv6),
the fix is pretty obvious.

diff --git a/usr.sbin/ldpd/hello.c b/usr.sbin/ldpd/hello.c
index e9c6da1..5eb8261 100644 (file)
--- a/usr.sbin/ldpd/hello.c
+++ b/usr.sbin/ldpd/hello.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: hello.c,v 1.51 2016/06/27 19:06:33 renato Exp $ */
+/*     $OpenBSD: hello.c,v 1.52 2016/06/27 19:18:54 renato Exp $ */
 
 /*
  * Copyright (c) 2013, 2016 Renato Westphal <renato@openbsd.org>
@@ -359,8 +359,8 @@ recv_hello(struct in_addr lsr_id, struct ldp_msg *lm, int af,
         * to start an LDP session.
         */
        if (nbr == NULL && (!ds_tlv ||
-           ((trans_pref == DUAL_STACK_LDPOV4 && af != AF_INET) ||
-           (trans_pref == DUAL_STACK_LDPOV6 && af != AF_INET6))))
+           ((trans_pref == DUAL_STACK_LDPOV4 && af == AF_INET) ||
+           (trans_pref == DUAL_STACK_LDPOV6 && af == AF_INET6))))
                nbr = nbr_new(lsr_id, af, ds_tlv, &trans_addr, scope_id);
 
        /* update neighbor's configuration sequence number */