Index: nse_nmaplib.cc
===================================================================
--- nse_nmaplib.cc	(revision 9443)
+++ nse_nmaplib.cc	(working copy)
@@ -12,7 +12,9 @@
 #include "Target.h"
 #include "output.h"
 #include "portlist.h"
+#include "nmap_dns.h"
 
+
 #define SCRIPT_ENGINE_GETSTRING(name) \
 	char* name; \
 	lua_getfield(L, -1, #name); \
@@ -43,6 +45,7 @@
 static int l_get_have_ssl(lua_State *L);
 static int l_fetchfile(lua_State *L);
 static int l_get_timing_level(lua_State *L);
+static int l_get_dns_servers(lua_State *L);
 
 int l_clock_ms(lua_State *L);
 
@@ -132,6 +135,7 @@
     {"fetchfile", l_fetchfile},
     {"timing_level", l_get_timing_level},
     {"mutex", l_mutex},
+    {"get_dns_servers", l_get_dns_servers},
     {NULL, NULL} 
   };
 
@@ -636,3 +640,22 @@
 	lua_pushnumber(L, o.timing_level);
 	return 1;
 }
+
+// returns a table with DNS servers known to nmap
+static int l_get_dns_servers(lua_State *L)
+{
+  std::list<std::string> servs2 = get_dns_servers();
+  std::list<std::string>::iterator servI2;
+
+  int i = 1;
+  lua_newtable(L);
+
+  for(servI2 = servs2.begin(); servI2 != servs2.end(); servI2++) {
+    lua_pushinteger(L, i);
+    const char *s = (*servI2).c_str();
+    lua_pushstring(L, s);
+    lua_settable(L, -3);
+    i++;
+  }
+  return 1;
+}
Index: nmap_dns.cc
===================================================================
--- nmap_dns.cc	(revision 9443)
+++ nmap_dns.cc	(working copy)
@@ -1326,3 +1326,20 @@
 
   firstrun=0;
 }
+
+// Returns a list of known DNS servers
+std::list<std::string> get_dns_servers() {
+  // if, for example, run with -n, list is not initialized,
+  // run empty nmap_mass_rdns to do so
+  if(servs.size() == 0 && firstrun) {
+    nmap_mass_rdns(NULL, 0);
+  }
+  std::list<dns_server *>::iterator servI;
+  std::list<std::string> serverList;
+  dns_server *tpserv;
+  for(servI = servs.begin(); servI != servs.end(); servI++) {
+    tpserv = *servI;
+    serverList.push_back(inet_ntoa(tpserv->addr.sin_addr));
+  }
+  return serverList;
+}
Index: nmap_dns.h
===================================================================
--- nmap_dns.h	(revision 9443)
+++ nmap_dns.h	(working copy)
@@ -103,3 +103,4 @@
 void free_dns_servers();
 void free_etchosts();
 
+std::list<std::string> get_dns_servers();