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Unix SMB/CIFS implementation.
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NBT netbios routines and daemon - version 2
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Copyright (C) Andrew Tridgell 1994-1998
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Copyright (C) Luke Kenneth Casson Leighton 1994-1998
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Copyright (C) Jeremy Allison 1994-1998
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Copyright (C) Christopher R. Hertel 1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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/* -------------------------------------------------------------------------- **
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* Modified July 1998 by CRH.
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* I converted this module to use the canned doubly-linked lists. I also
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* added comments above the functions where possible.
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/* -------------------------------------------------------------------------- **
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* lmb_browserlist - This is our local master browser list.
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struct browse_cache_record *lmb_browserlist;
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/* -------------------------------------------------------------------------- **
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/* ************************************************************************** **
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* Remove and free a browser list entry.
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* Input: browc - A pointer to the entry to be removed from the list and
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* ************************************************************************** **
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static void remove_lmb_browser_entry( struct browse_cache_record *browc )
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DLIST_REMOVE(lmb_browserlist, browc);
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/* ************************************************************************** **
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* Update a browser death time.
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* Input: browc - Pointer to the entry to be updated.
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* ************************************************************************** **
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void update_browser_death_time( struct browse_cache_record *browc )
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/* Allow the new lmb to miss an announce period before we remove it. */
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browc->death_time = time(NULL) + ( (CHECK_TIME_MST_ANNOUNCE + 2) * 60 );
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/* ************************************************************************** **
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* Create a browser entry and add it to the local master browser list.
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* Output: Pointer to the new entry, or NULL if malloc() failed.
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* ************************************************************************** **
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struct browse_cache_record *create_browser_in_lmb_cache( const char *work_name,
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const char *browser_name,
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struct browse_cache_record *browc;
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time_t now = time( NULL );
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browc = SMB_MALLOC_P(struct browse_cache_record);
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DEBUG( 0, ("create_browser_in_lmb_cache: malloc fail !\n") );
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memset( (char *)browc, '\0', sizeof( *browc ) );
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/* For a new lmb entry we want to sync with it after one minute. This
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will allow it time to send out a local announce and build its
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browc->sync_time = now + 60;
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/* Allow the new lmb to miss an announce period before we remove it. */
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browc->death_time = now + ( (CHECK_TIME_MST_ANNOUNCE + 2) * 60 );
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unstrcpy( browc->lmb_name, browser_name);
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unstrcpy( browc->work_group, work_name);
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strupper_m( browc->lmb_name );
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strupper_m( browc->work_group );
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DLIST_ADD_END(lmb_browserlist, browc, struct browse_cache_record *);
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if( DEBUGLVL( 3 ) ) {
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Debug1( "nmbd_browserdb:create_browser_in_lmb_cache()\n" );
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Debug1( " Added lmb cache entry for workgroup %s ", browc->work_group );
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Debug1( "name %s IP %s ", browc->lmb_name, inet_ntoa(ip) );
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Debug1( "ttl %d\n", (int)browc->death_time );
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/* ************************************************************************** **
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* Find a browser entry in the local master browser list.
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* Input: browser_name - The name for which to search.
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* Output: A pointer to the matching entry, or NULL if no match was found.
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* ************************************************************************** **
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struct browse_cache_record *find_browser_in_lmb_cache( const char *browser_name )
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struct browse_cache_record *browc;
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for( browc = lmb_browserlist; browc; browc = browc->next ) {
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if( strequal( browser_name, browc->lmb_name ) ) {
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/* ************************************************************************** **
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* Expire timed out browsers in the browserlist.
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* Input: t - Expiration time. Entries with death times less than this
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* value will be removed from the list.
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* ************************************************************************** **
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void expire_lmb_browsers( time_t t )
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struct browse_cache_record *browc;
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struct browse_cache_record *nextbrowc;
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for( browc = lmb_browserlist; browc; browc = nextbrowc) {
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nextbrowc = browc->next;
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if( browc->death_time < t ) {
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if( DEBUGLVL( 3 ) ) {
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Debug1( "nmbd_browserdb:expire_lmb_browsers()\n" );
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Debug1( " Removing timed out lmb entry %s\n", browc->lmb_name );
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remove_lmb_browser_entry( browc );