X-Git-Url: https://vcs.maemo.org/git/?p=samba;a=blobdiff_plain;f=source%2Fnmbd%2Fnmbd_browserdb.c;fp=source%2Fnmbd%2Fnmbd_browserdb.c;h=e8797a99d5136d3708ec2e6f08e281f88ad9a1e4;hp=0000000000000000000000000000000000000000;hb=6bca4ca307d55b6dc888e56cee47aebcddbce786;hpb=7fd70fa738b636089bcc6c961aa3eaa02f20dda2

diff --git a/source/nmbd/nmbd_browserdb.c b/source/nmbd/nmbd_browserdb.c
new file mode 100644
index 0000000..e8797a9
--- /dev/null
+++ b/source/nmbd/nmbd_browserdb.c
@@ -0,0 +1,175 @@
+/* 
+   Unix SMB/CIFS implementation.
+   NBT netbios routines and daemon - version 2
+   Copyright (C) Andrew Tridgell 1994-1998
+   Copyright (C) Luke Kenneth Casson Leighton 1994-1998
+   Copyright (C) Jeremy Allison 1994-1998
+   Copyright (C) Christopher R. Hertel 1998
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+   
+*/
+/* -------------------------------------------------------------------------- **
+ * Modified July 1998 by CRH.
+ *  I converted this module to use the canned doubly-linked lists.  I also
+ *  added comments above the functions where possible.
+ */
+
+#include "includes.h"
+
+/* -------------------------------------------------------------------------- **
+ * Variables...
+ *
+ *  lmb_browserlist - This is our local master browser list. 
+ */
+
+ubi_dlNewList( lmb_browserlist );
+
+/* -------------------------------------------------------------------------- **
+ * Functions...
+ */
+
+/* ************************************************************************** **
+ * Remove and free a browser list entry.
+ *
+ *  Input:  browc - A pointer to the entry to be removed from the list and
+ *                  freed.
+ *  Output: none.
+ *
+ * ************************************************************************** **
+ */
+static void remove_lmb_browser_entry( struct browse_cache_record *browc )
+{
+	safe_free( ubi_dlRemThis( lmb_browserlist, browc ) );
+}
+
+/* ************************************************************************** **
+ * Update a browser death time.
+ *
+ *  Input:  browc - Pointer to the entry to be updated.
+ *  Output: none.
+ *
+ * ************************************************************************** **
+ */
+void update_browser_death_time( struct browse_cache_record *browc )
+{
+	/* Allow the new lmb to miss an announce period before we remove it. */
+	browc->death_time = time(NULL) + ( (CHECK_TIME_MST_ANNOUNCE + 2) * 60 );
+}
+
+/* ************************************************************************** **
+ * Create a browser entry and add it to the local master browser list.
+ *
+ *  Input:  work_name
+ *          browser_name
+ *          ip
+ *
+ *  Output: Pointer to the new entry, or NULL if malloc() failed.
+ *
+ * ************************************************************************** **
+ */
+struct browse_cache_record *create_browser_in_lmb_cache( const char *work_name, 
+                                                         const char *browser_name, 
+                                                         struct in_addr ip )
+{
+	struct browse_cache_record *browc;
+	time_t now = time( NULL );
+
+	browc = SMB_MALLOC_P(struct browse_cache_record);
+
+	if( NULL == browc ) {
+		DEBUG( 0, ("create_browser_in_lmb_cache: malloc fail !\n") );
+		return( NULL );
+	}
+
+	memset( (char *)browc, '\0', sizeof( *browc ) );
+  
+	/* For a new lmb entry we want to sync with it after one minute. This
+	 will allow it time to send out a local announce and build its
+	 browse list.
+	*/
+
+	browc->sync_time = now + 60;
+
+	/* Allow the new lmb to miss an announce period before we remove it. */
+	browc->death_time = now + ( (CHECK_TIME_MST_ANNOUNCE + 2) * 60 );
+
+	unstrcpy( browc->lmb_name, browser_name);
+	unstrcpy( browc->work_group, work_name);
+	strupper_m( browc->lmb_name );
+	strupper_m( browc->work_group );
+  
+	browc->ip = ip;
+ 
+	(void)ubi_dlAddTail( lmb_browserlist, browc );
+
+	if( DEBUGLVL( 3 ) ) {
+		Debug1( "nmbd_browserdb:create_browser_in_lmb_cache()\n" );
+		Debug1( "  Added lmb cache entry for workgroup %s ", browc->work_group );
+		Debug1( "name %s IP %s ", browc->lmb_name, inet_ntoa(ip) );
+		Debug1( "ttl %d\n", (int)browc->death_time );
+	}
+  
+	return( browc );
+}
+
+/* ************************************************************************** **
+ * Find a browser entry in the local master browser list.
+ *
+ *  Input:  browser_name  - The name for which to search.
+ *
+ *  Output: A pointer to the matching entry, or NULL if no match was found.
+ *
+ * ************************************************************************** **
+ */
+struct browse_cache_record *find_browser_in_lmb_cache( const char *browser_name )
+{
+	struct browse_cache_record *browc;
+
+	for( browc = (struct browse_cache_record *)ubi_dlFirst( lmb_browserlist );
+			browc; browc = (struct browse_cache_record *)ubi_dlNext( browc ) )
+		if( strequal( browser_name, browc->lmb_name ) )
+			break;
+
+	return( browc );
+}
+
+/* ************************************************************************** **
+ *  Expire timed out browsers in the browserlist.
+ *
+ *  Input:  t - Expiration time.  Entries with death times less than this
+ *              value will be removed from the list.
+ *  Output: none.
+ *
+ * ************************************************************************** **
+ */
+void expire_lmb_browsers( time_t t )
+{
+	struct browse_cache_record *browc;
+	struct browse_cache_record *nextbrowc;
+
+	for( browc = (struct browse_cache_record *)ubi_dlFirst( lmb_browserlist );
+			browc; browc = nextbrowc ) {
+		nextbrowc = (struct browse_cache_record *)ubi_dlNext( browc );
+
+		if( browc->death_time < t ) {
+			if( DEBUGLVL( 3 ) ) {
+				Debug1( "nmbd_browserdb:expire_lmb_browsers()\n" );
+				Debug1( "  Removing timed out lmb entry %s\n", browc->lmb_name );
+			}
+			remove_lmb_browser_entry( browc );
+		}
+	}
+}