1916. [func] host/nslookup now continue (default)/fail on SERVFAIL.

[RT #15006]

CHANGES

@@ -1,3 +1,6 @@
+1916.	[func]		host/nslookup now continue (default)/fail on SERVFAIL.
+			[RT #15006]
+
 1915.	[func]		dig now has a '-q queryname' and '+showsearch' options.
 			[RT #15034]
 

bin/dig/host.c

@@ -15,7 +15,7 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: host.c,v 1.104 2005/07/04 03:03:20 marka Exp $ */
+/* $Id: host.c,v 1.105 2005/08/25 00:31:31 marka Exp $ */
 
 /*! \file */
 
@@ -124,6 +124,7 @@ show_usage(void) {
 "       -N changes the number of dots allowed before root lookup is done\n"
 "       -r disables recursive processing\n"
 "       -R specifies number of retries for UDP packets\n"
+"       -s a SERVFAIL response should stop query\n"
 "       -t specifies the query type\n"
 "       -T enables TCP/IP mode\n"
 "       -v enables verbose output\n"
@@ -525,7 +526,7 @@ printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
 	return (result);
 }
 
-static const char * optstring = "46ac:dilnm:rt:vwCDN:R:TW:";
+static const char * optstring = "46ac:dilnm:rst:vwCDN:R:TW:";
 
 static void
 pre_parse_args(int argc, char **argv) {
@@ -553,6 +554,7 @@ pre_parse_args(int argc, char **argv) {
 		case 'l': break;
 		case 'n': break;
 		case 'r': break;
+		case 's': break;
 		case 't': break;
 		case 'v': break;
 		case 'w': break;
@@ -586,6 +588,9 @@ parse_args(isc_boolean_t is_batchfile, int argc, char **argv) {
 
 	lookup = make_empty_lookup();
 
+	lookup->servfail_stops = ISC_FALSE;
+	lookup->comments = ISC_FALSE;
+
 	while ((c = isc_commandline_parse(argc, argv, optstring)) != -1) {
 		switch (c) {
 		case 'l':
@@ -726,6 +731,9 @@ parse_args(isc_boolean_t is_batchfile, int argc, char **argv) {
 			} else
 				fatal("can't find IPv6 networking");
 			break;
+		case 's':
+			lookup->servfail_stops = ISC_TRUE;
+			break;
 		}
 	}
 

bin/dig/host.docbook

@@ -18,7 +18,7 @@
  - PERFORMANCE OF THIS SOFTWARE.
 -->
 
-<!-- $Id: host.docbook,v 1.10 2005/07/19 04:55:20 marka Exp $ -->
+<!-- $Id: host.docbook,v 1.11 2005/08/25 00:31:32 marka Exp $ -->
 <refentry id="man.host">
 
   <refentryinfo>
@@ -53,7 +53,7 @@
   <refsynopsisdiv>
     <cmdsynopsis>
       <command>host</command>
-      <arg><option>-aCdlnrTwv</option></arg>
+      <arg><option>-aCdlnrsTwv</option></arg>
       <arg><option>-c <replaceable class="parameter">class</replaceable></option></arg>
       <arg><option>-N <replaceable class="parameter">ndots</replaceable></option></arg>
       <arg><option>-R <replaceable class="parameter">number</replaceable></option></arg>
@@ -222,6 +222,13 @@
       value for an integer quantity.
     </para>
 
+    <para>
+      The <option>-s</option> option tells <command>host</command> 
+      <emphasis>not</emphasis> to send the query to the next nameserver
+      if any server responds with a SERVFAIL response, which is the
+      reverse of normal stub resolver behaviour.
+    </para>
+
     <para>
       The <option>-m</option> can be used to set the memory usage debugging
       flags

bin/dig/nslookup.c

@@ -15,7 +15,7 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: nslookup.c,v 1.109 2005/07/12 05:47:18 marka Exp $ */
+/* $Id: nslookup.c,v 1.110 2005/08/25 00:31:32 marka Exp $ */
 
 #include <config.h>
 
@@ -50,7 +50,8 @@ static isc_boolean_t short_form = ISC_TRUE,
 	comments = ISC_TRUE, section_question = ISC_TRUE,
 	section_answer = ISC_TRUE, section_authority = ISC_TRUE,
 	section_additional = ISC_TRUE, recurse = ISC_TRUE,
-	aaonly = ISC_FALSE;
+	aaonly = ISC_FALSE, nofail = ISC_TRUE;
+
 static isc_boolean_t in_use = ISC_FALSE;
 static char defclass[MXRD] = "IN";
 static char deftype[MXRD] = "A";
@@ -631,6 +632,10 @@ setoption(char *opt) {
 		usesearch = ISC_FALSE;
 	} else if (strncasecmp(opt, "sil", 3) == 0) {
 		/* deprecation_msg = ISC_FALSE; */
+	} else if (strncasecmp(opt, "fail", 3) == 0) {
+		nofail=ISC_FALSE;
+	} else if (strncasecmp(opt, "nofail", 3) == 0) {
+		nofail=ISC_TRUE;
 	} else {
 		printf("*** Invalid option: %s\n", opt);	
 	}
@@ -689,6 +694,8 @@ addlookup(char *opt) {
 	lookup->section_authority = section_authority;
 	lookup->section_additional = section_additional;
 	lookup->new_search = ISC_TRUE;
+	if (nofail)
+		lookup->servfail_stops = ISC_FALSE;
 	ISC_LIST_INIT(lookup->q);
 	ISC_LINK_INIT(lookup, link);
 	ISC_LIST_APPEND(lookup_list, lookup, link);

bin/dig/nslookup.docbook

@@ -17,7 +17,7 @@
  - PERFORMANCE OF THIS SOFTWARE.
 -->
 
-<!-- $Id: nslookup.docbook,v 1.7 2005/05/13 01:35:39 marka Exp $ -->
+<!-- $Id: nslookup.docbook,v 1.8 2005/08/25 00:31:32 marka Exp $ -->
 <!--
  - Copyright (c) 1985, 1989
  -    The Regents of the University of California.  All rights reserved.
@@ -441,6 +441,21 @@ nslookup -query=hinfo  -timeout=10
                 </listitem>
               </varlistentry>
 
+              <varlistentry>
+                <term><constant>
+                    <replaceable><optional>no</optional></replaceable>fail</constant></term>
+                <listitem>
+                  <para>
+		    Try the next nameserver if a nameserver responds with
+		    SERVFAIL or a referral (nofail) or terminate query
+		    (fail) on such a response.
+		  </para>
+		  <para>
+                    (Default = nofail)
+                  </para>
+	        </listitem>
+	      </varlistentry>
+
             </variablelist>
           </para>
         </listitem>