[master] truncate logged rdata if too long

3490.	[bug]		When logging RDATA during update, truncate if it's
                        too long. [RT #32365]

cherry picked from:
        commit 16ddb566e5a5b57bf925adef2b5543dddc1de49b
        commit cd97e0c23b09f38aac49aabab66ee13c68b7a3f3
        commit d087fa982649c081d58c5bb16e63da3428e2b89d
        commit d0795bdffef57612dd7654ffd09c9f4216eee2c8

CHANGES

@@ -1,3 +1,6 @@
+3490.	[bug]		When logging RDATA during update, truncate if it's
+                        too long. [RT #32365]
+
 3489.	[bug]		--enable-developer now turns on ISC_LIST_CHECKINIT.
 			dns_dlzcreate() failed to properly initialize
 			dlzdb.link.  When cloning a rdataset do not copy
@@ -79,7 +82,7 @@
 3464.	[maint]		Updates to PKCS#11 openssl patches, supporting
 			versions 0.9.8x, 1.0.0j, 1.0.1c [RT #29749]
 
-3463.	[doc]		Clarify managed-keys syntax in ARM. [RT 32232]
+3463.	[doc]		Clarify managed-keys syntax in ARM. [RT #32232]
 
 3462.	[doc]		Clarify server selection behavior of dig when using
 			-4 or -6 options. [RT #32181]

bin/named/client.c

@@ -2808,7 +2808,7 @@ void
 ns_client_logv(ns_client_t *client, isc_logcategory_t *category,
 	       isc_logmodule_t *module, int level, const char *fmt, va_list ap)
 {
-	char msgbuf[2048];
+	char msgbuf[4096];
 	char peerbuf[ISC_SOCKADDR_FORMATSIZE];
 	char signerbuf[DNS_NAME_FORMATSIZE], qnamebuf[DNS_NAME_FORMATSIZE];
 	const char *viewname = "";

bin/named/update.c

@@ -2859,22 +2859,30 @@ update_action(isc_task_t *task, isc_event_t *event) {
 			if (isc_log_wouldlog(ns_g_lctx, LOGLEVEL_PROTOCOL)) {
 				char namestr[DNS_NAME_FORMATSIZE];
 				char typestr[DNS_RDATATYPE_FORMATSIZE];
-				char rdstr[4096];
+				char rdstr[2048];
 				isc_buffer_t buf;
-				isc_region_t r;
 				int len = 0;
+				const char *truncated = "";
+
 				dns_name_format(name, namestr, sizeof(namestr));
 				dns_rdatatype_format(rdata.type, typestr,
 						     sizeof(typestr));
 				isc_buffer_init(&buf, rdstr, sizeof(rdstr));
 				result = dns_rdata_totext(&rdata, NULL, &buf);
-				isc_buffer_usedregion(&buf, &r);
-				if (result == ISC_R_SUCCESS)
-					len = r.length;
+				if (result == ISC_R_NOSPACE) {
+					len = (int)isc_buffer_usedlength(&buf);
+					truncated = " [TRUNCATED]";
+				} else if (result != ISC_R_SUCCESS) {
+					snprintf(rdstr, sizeof(rdstr), "[dns_"
+						 "rdata_totext failed: %s]",
+						 dns_result_totext(result));
+					len = strlen(rdstr);
+				} else
+					len = (int)isc_buffer_usedlength(&buf);
 				update_log(client, zone, LOGLEVEL_PROTOCOL,
-					   "adding an RR at '%s' %s %.*s",
-					   namestr, typestr, len,
-					   (char *) r.base);
+					   "adding an RR at '%s' %s %.*s%s",
+					   namestr, typestr, len, rdstr,
+					   truncated);
 			}
 
 			/* Prepare the affected RRset for the addition. */

bin/nsupdate/nsupdate.c

@@ -104,7 +104,7 @@ extern int h_errno;
 #endif
 #endif
 
-#define MAXCMD (4 * 1024)
+#define MAXCMD (128 * 1024)
 #define MAXWIRE (64 * 1024)
 #define PACKETSIZE ((64 * 1024) - 1)
 #define INITTEXT (2 * 1024)

bin/tests/system/nsupdate/tests.sh

@@ -552,5 +552,17 @@ if [ $ret -ne 0 ]; then
     status=1
 fi
 
+n=`expr $n + 1`
+ret=0
+echo "I:add a record which is truncated when logged. ($n)"
+$NSUPDATE verylarge || ret=1
+$DIG +tcp @10.53.0.1 -p 5300 txt txt.update.nil > dig.out.ns1.test$n
+grep "ANSWER: 1," dig.out.ns1.test$n > /dev/null || ret=1
+grep "adding an RR at 'txt.update.nil' TXT .* \[TRUNCATED\]"  ns1/named.run > /dev/null || ret=1
+if [ $ret -ne 0 ]; then
+    echo "I:failed"
+    status=1
+fi
+
 echo "I:exit status: $status"
 exit $status