query.c: Use a null `zone' pointer for `_submit_reverse' signalling.

Currently undocumented.  Might need to revert to using a magic token if
we come up with a better meaning for a null `zone' pointer to
`adns_submit_reverse_any'.

diff --git a/src/query.c b/src/query.c
index 66682b457db87e829f078efe1d8e51e5cfa5bef5..708120faf1855d1ee3c745e1c8f1395fad1c7390 100644 (file)
--- a/src/query.c
+++ b/src/query.c
@@ -325,8 +325,6 @@ int adns_submit(adns_state ads,
   return r;
 }
 
-static const char *default_zone = "<magic>";
-
 int adns_submit_reverse_any(adns_state ads,
                            const struct sockaddr *addr,
                            const char *zone,
@@ -344,11 +342,11 @@ int adns_submit_reverse_any(adns_state ads,
   switch (addr->sa_family) {
     case AF_INET:
       ai = &adns__inet_afinfo;
-      if (zone == default_zone) zone = "in-addr.arpa";
+      if (!zone) zone = "in-addr.arpa";
       break;
     case AF_INET6:
       ai = &adns__inet6_afinfo;
-      if (zone == default_zone) zone = "ip6.arpa";
+      if (!zone) zone = "ip6.arpa";
       break;
     default:
       return ENOSYS;
@@ -380,8 +378,7 @@ int adns_submit_reverse(adns_state ads,
                        void *context,
                        adns_query *query_r) {
   if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL;
-  return adns_submit_reverse_any(ads,addr,default_zone,
-                                type,flags,context,query_r);
+  return adns_submit_reverse_any(ads,addr,0,type,flags,context,query_r);
 }
 
 int adns_synchronous(adns_state ads,