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/*
Unix SMB/Netbios implementation.
Version 1.9.
NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 1994-1997
Copyright (C) Luke Kenneth Casson Leighton 1994-1997
Copyright (C) Jeremy Allison 1994-1997
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.
*/
#include "includes.h"
#include "smb.h"
extern int DEBUGLEVEL;
/* This is our local master browser list database. */
struct browse_cache_record *lmb_browserlist = NULL;
/***************************************************************************
Add a browser into the lmb list.
**************************************************************************/
static void add_to_lmb_browse_cache(struct browse_cache_record *browc)
{
struct browse_cache_record *browc2;
if (lmb_browserlist == NULL)
{
lmb_browserlist = browc;
browc->prev = NULL;
browc->next = NULL;
return;
}
for (browc2 = lmb_browserlist; browc2->next; browc2 = browc2->next)
;
browc2->next = browc;
browc->next = NULL;
browc->prev = browc2;
}
/*******************************************************************
Remove a lmb browser entry.
******************************************************************/
void remove_lmb_browser_entry(struct browse_cache_record *browc)
{
if (browc->prev)
browc->prev->next = browc->next;
if (browc->next)
browc->next->prev = browc->prev;
if (lmb_browserlist == browc)
lmb_browserlist = browc->next;
free((char *)browc);
}
/****************************************************************************
Update a browser death time.
****************************************************************************/
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.
****************************************************************************/
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 (browc == NULL)
{
DEBUG(0,("create_browser_in_lmb_cache: malloc fail !\n"));
return(NULL);
}
bzero((char *)browc,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;
add_to_lmb_browse_cache(browc);
DEBUG(3,("create_browser_in_lmb_cache: Added lmb cache entry for workgroup %s name %s IP %s ttl %d\n",
browc->work_group, browc->lmb_name, inet_ntoa(ip), browc->death_time));
return(browc);
}
/****************************************************************************
Find a browser entry.
****************************************************************************/
struct browse_cache_record *find_browser_in_lmb_cache( char *browser_name )
{
struct browse_cache_record *browc = NULL;
for( browc = lmb_browserlist; browc; browc = browc->next)
if(strequal( browser_name, browc->lmb_name))
break;
return browc;
}
/*******************************************************************
Expire timed out browsers in the browserlist.
******************************************************************/
void expire_lmb_browsers(time_t t)
{
struct browse_cache_record *browc;
struct browse_cache_record *nextbrowc;
for (browc = lmb_browserlist; browc; browc = nextbrowc)
{
nextbrowc = browc->next;
if (browc->death_time < t)
{
DEBUG(3,("expire_lmb_browsers: Removing timed out lmb entry %s\n",browc->lmb_name));
remove_lmb_browser_entry(browc);
}
}
}
/*******************************************************************
Remove browsers from a named workgroup in the browserlist.
******************************************************************/
void remove_workgroup_lmb_browsers(char *work_group)
{
struct browse_cache_record *browc;
struct browse_cache_record *nextbrowc;
for (browc = lmb_browserlist; browc; browc = nextbrowc)
{
nextbrowc = browc->next;
if (strequal(work_group, browc->work_group))
{
DEBUG(3,("remove_workgroup_browsers: Removing lmb entry %s\n",browc->lmb_name));
remove_lmb_browser_entry(browc);
}
}
}
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