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/*
Unix SMB/Netbios implementation.
Version 1.9.
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"
extern int DEBUGLEVEL;
/* -------------------------------------------------------------------------- **
* 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 ) );
} /* remove_lmb_browser_entry */
/* ************************************************************************** **
* 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 );
} /* update_browser_death_time */
/* ************************************************************************** **
* 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( char *work_name,
char *browser_name,
struct in_addr ip )
{
struct browse_cache_record *browc;
time_t now = time( NULL );
browc = (struct browse_cache_record *)malloc( sizeof( *browc ) );
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 );
StrnCpy( browc->lmb_name, browser_name, sizeof(browc->lmb_name)-1 );
StrnCpy( browc->work_group, work_name, sizeof(browc->work_group)-1 );
strupper( browc->lmb_name );
strupper( 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 );
} /* create_browser_in_lmb_cache */
/* ************************************************************************** **
* 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( 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 );
} /* find_browser_in_lmb_cache */
/* ************************************************************************** **
* 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 );
}
}
} /* expire_lmb_browsers */
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