--- a/src/dnsbl.h	Tue Feb 28 17:02:07 2017 -0800
+++ b/src/dnsbl.h	Mon Mar 06 12:21:05 2017 -0800
@@ -12,7 +12,6 @@
 #include "context.h"
 #include "spamass.h"
 #include "dccifd.h"
-#include <stdint.h>
 
 extern int debug_syslog;
 #define dccbulk 1000
@@ -85,9 +84,18 @@
     void need_content_filter(CONTEXT &con);
 };
 
+struct ns_map {
+    // all the strings are owned by the keys/values in the ns_host string map
+    string_map  ns_host;    // nameserver name -> host name that uses this name server
+    ns_mapper   ns_ip;      // nameserver name -> ipv4 address of the name server
+    ~ns_map();
+    void add(const char *name, const char *refer);
+};
+
 void my_syslog(const char *queueid, const char *text);
 void my_syslog(mlfiPriv *priv, const char *text);
 void my_syslog(mlfiPriv *priv, const string text);
 void my_syslog(const char *text);
+uint32_t dns_interface(mlfiPriv &priv, const char *question, int qtype, bool maybe_ip = false, ns_map *nameservers = NULL, char *txt_answer = NULL, size_t txt_size = 0);
 
 #endif