From 8edb4966aeb8a8df6e5e348085450b6686bdc879 Mon Sep 17 00:00:00 2001
From: "Christopher R. Hertel" <crh@samba.org>
Date: Wed, 12 Jul 2000 04:25:12 +0000
Subject: An improved version of the Negative Query Response fix.  The earlier
 fix only did a short-cut on an rcode of 3, which is 'name not found'.  This
 does a short-cut on any non-zero rcode.  It also puts out a DEBUG message (if
 DEBUGLEVEL is >= 3) detailing the error.

Chris -)-----
(This used to be commit d8656304d51844335e72babe852673f2dececfdc)
---
 source3/libsmb/namequery.c | 47 ++++++++++++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 10 deletions(-)

(limited to 'source3/libsmb/namequery.c')

diff --git a/source3/libsmb/namequery.c b/source3/libsmb/namequery.c
index 82c8c8f93d..193731768f 100644
--- a/source3/libsmb/namequery.c
+++ b/source3/libsmb/namequery.c
@@ -272,16 +272,42 @@ struct in_addr *name_query(int fd,const char *name,int name_type,
 		  struct nmb_packet *nmb2 = &p2->packet.nmb;
 		  debug_nmb_packet(p2);
 
+		  /* If we get a Negative Name Query Response from a WINS
+		   * server, we should report it and give up.
+		   */
 		  if( 0 == nmb2->header.opcode		/* A query response   */
 		      && !(bcast)			/* from a WINS server */
-		      && 0x03 == nmb2->header.rcode	/* Name doesn't exist */
+		      && nmb2->header.rcode		/* Error returned     */
 		    ) {
-		    /* If we get a Negative Name Query Response from a WINS
-		     * server, we should give up.
-		     */
-		    free_packet(p2);
-		    return( NULL );
+
+		    if( DEBUGLVL( 3 ) ) {
+		      /* Only executed if DEBUGLEVEL >= 3 */
+		      dbgtext( "Negative name query response, rcode 0x%02x: ",
+				nmb2->header.rcode );
+		      switch( nmb2->header.rcode ) {
+		        case 0x01:
+			  dbgtext( "Request was invalidly formatted.\n" );
+			  break;
+		        case 0x02:
+			  dbgtext( "Problem with NBNS, cannot process name.\n");
+			  break;
+		        case 0x03:
+			  dbgtext( "The name requested does not exist.\n" );
+			  break;
+		        case 0x04:
+			  dbgtext( "Unsupported request error.\n" );
+			  break;
+		        case 0x05:
+			  dbgtext( "Refused error.\n" );
+			  break;
+		        default:
+			  dbgtext( "Unrecognized error code.\n" );
+			  break;
+		      }
 		    }
+	            free_packet(p2);
+		    return( NULL );
+		  }
 
 		  if (nmb2->header.opcode != 0 ||
 		      nmb2->header.nm_flags.bcast ||
@@ -295,17 +321,18 @@ struct in_addr *name_query(int fd,const char *name,int name_type,
 			  continue;
 		  }
 
-		  ip_list = (struct in_addr *)Realloc(ip_list, sizeof(ip_list[0]) * 
-						      ((*count)+nmb2->answers->rdlength/6));
+		  ip_list = (struct in_addr *)Realloc( ip_list,
+				sizeof( ip_list[0] )
+				* ( (*count) + nmb2->answers->rdlength/6 ) );
 		  if (ip_list) {
 			  DEBUG(2,("Got a positive name query response from %s ( ",
 				   inet_ntoa(p2->ip)));
 			  for (i=0;i<nmb2->answers->rdlength/6;i++) {
 				  putip((char *)&ip_list[(*count)],&nmb2->answers->rdata[2+i*6]);
-				  DEBUG(2,("%s ",inet_ntoa(ip_list[(*count)])));
+				  DEBUGADD(2,("%s ",inet_ntoa(ip_list[(*count)])));
 				  (*count)++;
 			  }
-			  DEBUG(2,(")\n"));
+			  DEBUGADD(2,(")\n"));
 		  }
 
 		  found=True;
-- 
cgit