--- /dev/null
+/*
+ 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 );
+ }
+ }
+}
projects / samba / blobdiff