dig: add the ability to set RA and TC in queries

CHANGES

+4929.	[func]		Add the ability to set RA and TC in queries made by
+			dig (+[no]raflag, +[no]tcflag). [GL #213]
+
 4928.	[func]		The "dnskey-sig-validity" option allows
 			"sig-validity-interval" to be overriden for signatures
 			covering DNSKEY RRsets. [GL #145]

bin/dig/dig.c

@@ -205,6 +205,7 @@ help(void) {
 "                 +padding=###        (Set padding block size [0])\n"
 "                 +[no]qr             (Print question before sending)\n"
 "                 +[no]question       (Control display of question section)\n"
+"                 +[no]raflag         (Set RA flag in query (+[no]raflag))\n"
 "                 +[no]rdflag         (Recursive mode (+[no]recurse))\n"
 "                 +[no]recurse        (Recursive mode (+[no]rdflag))\n"
 "                 +retry=###          (Set number of UDP retries) [2]\n"
@@ -217,6 +218,7 @@ help(void) {
 "                 +[no]split=##       (Split hex/base64 fields into chunks)\n"
 "                 +[no]stats          (Control display of statistics)\n"
 "                 +subnet=addr        (Set edns-client-subnet option)\n"
+"                 +[no]tcflag         (Set TC flag in query (+[no]tcflag))\n"
 "                 +[no]tcp            (TCP mode (+[no]vc))\n"
 "                 +timeout=###        (Set query timeout) [5]\n"
 "                 +[no]trace          (Trace delegation down from root [+dnssec])\n"
@@ -1240,6 +1242,10 @@ plus_option(char *option, isc_boolean_t is_batchfile,
 		break;
 	case 'r':
 		switch (cmd[1]) {
+		case 'a': /* raflag */
+			FULLCHECK("raflag");
+			lookup->raflag = state;
+			break;
 		case 'd': /* rdflag */
 			FULLCHECK("rdflag");
 			lookup->recurse = state;
@@ -1383,10 +1389,20 @@ plus_option(char *option, isc_boolean_t is_batchfile,
 	case 't':
 		switch (cmd[1]) {
 		case 'c': /* tcp */
-			FULLCHECK("tcp");
-			if (!is_batchfile) {
-				lookup->tcp_mode = state;
-				lookup->tcp_mode_set = ISC_TRUE;
+			switch (cmd[2]) {
+			case 'f':
+				FULLCHECK("tcflag");
+				lookup->tcflag = state;
+				break;
+			case 'p':
+				FULLCHECK("tcp");
+				if (!is_batchfile) {
+					lookup->tcp_mode = state;
+					lookup->tcp_mode_set = ISC_TRUE;
+				}
+				break;
+			default:
+				goto invalid_option;
 			}
 			break;
 		case 'i': /* timeout */

bin/dig/dig.docbook

@@ -953,6 +953,17 @@
 	  </listitem>
 	</varlistentry>
 
+	<varlistentry>
+	  <term><option>+[no]raflag</option></term>
+	  <listitem>
+	    <para>
+	      Set [do not set] the RA (Recursion Available) bit in
+	      the query. The default is +noraflag. This bit should
+	      be ignored by the server for QUERY.
+	    </para>
+	  </listitem>
+	</varlistentry>
+
 	<varlistentry>
 	  <term><option>+[no]rdflag</option></term>
 	  <listitem>
@@ -1096,6 +1107,17 @@
 	  </listitem>
 	</varlistentry>
 
+	<varlistentry>
+	  <term><option>+[no]tcflag</option></term>
+	  <listitem>
+	    <para>
+	      Set [do not set] the TC (TrunCation) bit in the query.
+	      The default is +notcflag.  This bit should be ignored
+	      by the server for QUERY.
+	    </para>
+	  </listitem>
+	</varlistentry>
+
 	<varlistentry>
 	  <term><option>+[no]tcp</option></term>
 	  <listitem>

bin/dig/dighost.c

@@ -655,6 +655,8 @@ make_empty_lookup(void) {
 	looknew->aaonly = ISC_FALSE;
 	looknew->adflag = ISC_FALSE;
 	looknew->cdflag = ISC_FALSE;
+	looknew->raflag = ISC_FALSE;
+	looknew->tcflag = ISC_FALSE;
 	looknew->print_unknown_format = ISC_FALSE;
 	looknew->zflag = ISC_FALSE;
 	looknew->ns_search_only = ISC_FALSE;
@@ -797,6 +799,8 @@ clone_lookup(dig_lookup_t *lookold, isc_boolean_t servers) {
 	looknew->aaonly = lookold->aaonly;
 	looknew->adflag = lookold->adflag;
 	looknew->cdflag = lookold->cdflag;
+	looknew->raflag = lookold->raflag;
+	looknew->tcflag = lookold->tcflag;
 	looknew->print_unknown_format = lookold->print_unknown_format;
 	looknew->zflag = lookold->zflag;
 	looknew->ns_search_only = lookold->ns_search_only;
@@ -2235,6 +2239,16 @@ setup_lookup(dig_lookup_t *lookup) {
 		lookup->sendmsg->flags |= DNS_MESSAGEFLAG_CD;
 	}
 
+	if (lookup->raflag) {
+		debug("RA query");
+		lookup->sendmsg->flags |= DNS_MESSAGEFLAG_RA;
+	}
+
+	if (lookup->tcflag) {
+		debug("TC query");
+		lookup->sendmsg->flags |= DNS_MESSAGEFLAG_TC;
+	}
+
 	if (lookup->zflag) {
 		debug("Z query");
 		lookup->sendmsg->flags |= 0x0040U;

bin/dig/include/dig/dig.h

@@ -94,6 +94,8 @@ struct dig_lookup {
 		aaonly,
 		adflag,
 		cdflag,
+		raflag,
+		tcflag,
 		zflag,
 		trace, /*% dig +trace */
 		trace_root, /*% initial query for either +trace or +nssearch */

bin/tests/system/digdelv/tests.sh

@@ -140,6 +140,7 @@ if [ -x ${DIG} ] ; then
   if [ $ret != 0 ]; then echo_i "failed"; fi
   status=`expr $status + $ret`
 
+  n=`expr $n + 1`
   echo_i "checking dig +header-only works ($n)"
   ret=0
   $DIG $DIGOPTS +tcp @10.53.0.3 +header-only example > dig.out.test$n || ret=1
@@ -148,6 +149,24 @@ if [ -x ${DIG} ] ; then
   if [ $ret != 0 ]; then echo_i "failed"; fi
   status=`expr $status + $ret`
 
+  n=`expr $n + 1`
+  echo_i "checking dig +raflag works ($n)"
+  ret=0
+  $DIG $DIGOPTS +tcp @10.53.0.3 +raflag +qr example > dig.out.test$n || ret=1
+  grep "^;; flags: rd ra ad; QUERY: 1, ANSWER: 0," < dig.out.test$n > /dev/null || ret=1
+  grep "^;; flags: qr rd ra; QUERY: 1, ANSWER: 0," < dig.out.test$n > /dev/null || ret=1
+  if [ $ret != 0 ]; then echo_i "failed"; fi
+  status=`expr $status + $ret`
+
+  n=`expr $n + 1`
+  echo_i "checking dig +tcflag works ($n)"
+  ret=0
+  $DIG $DIGOPTS +tcp @10.53.0.3 +tcflag +qr example > dig.out.test$n || ret=1
+  grep "^;; flags: tc rd ad; QUERY: 1, ANSWER: 0" < dig.out.test$n > /dev/null || ret=1
+  grep "^;; flags: qr rd ra; QUERY: 1, ANSWER: 0," < dig.out.test$n > /dev/null || ret=1
+  if [ $ret != 0 ]; then echo_i "failed"; fi
+  status=`expr $status + $ret`
+
   n=`expr $n + 1`
   echo_i "checking dig +header-only works (with class and type set) ($n)"
   ret=0