/* 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" /* -------------------------------------------------------------------------- ** * 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( (char *)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 */