DHCPv6: enable flash-renumbering hack only for /64 prefixes

diff --git a/src/dhcpv6-ia.c b/src/dhcpv6-ia.c
index b21b39e1007fca8ada8663689d8019e43b33cbc1..d103ecb422adfc3e398d9f36d703666fb1f39d7d 100644 (file)
--- a/src/dhcpv6-ia.c
+++ b/src/dhcpv6-ia.c
@@ -810,7 +810,8 @@ static size_t append_reply(uint8_t *buf, size_t buflen, uint16_t status,
                                        n.addr.s6_addr32[3] = htonl(a->assigned);
                                        size_t entrlen = sizeof(n) - 4;
 
-                                       if (!a->accept_reconf && iface->managed < RELAYD_MANAGED_NO_AFLAG)
+                                       if (!a->accept_reconf && iface->managed < RELAYD_MANAGED_NO_AFLAG &&
+                                                       addrs[i].prefix == 64)
                                                n.preferred = htonl(1);
 
 #ifdef DHCPV6_OPT_PREFIX_CLASS