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/*
Unix SMB/Netbios implementation.
Version 1.9.
NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 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.
Revision History:
14 jan 96: lkcl@pires.co.uk
added multiple workgroup domain master support
04 jul 96: lkcl@pires.co.uk
created module namedbserver containing server database functions
*/
#include "includes.h"
#include "smb.h"
extern int ClientNMB;
extern int ClientDGRAM;
extern int DEBUGLEVEL;
extern pstring myname;
extern fstring myworkgroup;
/* this is our domain/workgroup/server database */
extern struct subnet_record *subnetlist;
extern BOOL updatedlists;
/*******************************************************************
expire old servers in the serverlist
time of -1 indicates everybody dies except those with time of 0
remove_all_servers indicates everybody dies.
******************************************************************/
void remove_old_servers(struct work_record *work, time_t t,
BOOL remove_all)
{
struct server_record *s;
struct server_record *nexts;
/* expire old entries in the serverlist */
for (s = work->serverlist; s; s = nexts)
{
if (remove_all || (s->death_time && (t == -1 || s->death_time < t)))
{
DEBUG(3,("Removing dead server %s\n",s->serv.name));
updatedlists = True;
nexts = s->next;
if (s->prev) s->prev->next = s->next;
if (s->next) s->next->prev = s->prev;
if (work->serverlist == s)
work->serverlist = s->next;
free(s);
}
else
{
nexts = s->next;
}
}
}
/***************************************************************************
add a server into the list
**************************************************************************/
static void add_server(struct work_record *work,struct server_record *s)
{
struct server_record *s2;
if (!work->serverlist) {
work->serverlist = s;
s->prev = NULL;
s->next = NULL;
return;
}
for (s2 = work->serverlist; s2->next; s2 = s2->next) ;
s2->next = s;
s->next = NULL;
s->prev = s2;
}
/****************************************************************************
find a server in a server list.
**************************************************************************/
struct server_record *find_server(struct work_record *work, char *name)
{
struct server_record *ret;
if (!work) return NULL;
for (ret = work->serverlist; ret; ret = ret->next)
{
if (strequal(ret->serv.name,name))
{
return ret;
}
}
return NULL;
}
/****************************************************************************
add a server entry
****************************************************************************/
struct server_record *add_server_entry(struct subnet_record *d,
struct work_record *work,
char *name,int servertype,
int ttl,char *comment,
BOOL replace)
{
BOOL newentry=False;
struct server_record *s;
if (name[0] == '*')
{
return (NULL);
}
s = find_server(work, name);
if (s && !replace)
{
DEBUG(4,("Not replacing %s\n",name));
return(s);
}
if (!s || s->serv.type != servertype || !strequal(s->serv.comment, comment))
updatedlists=True;
if (!s)
{
newentry = True;
s = (struct server_record *)malloc(sizeof(*s));
if (!s) return(NULL);
bzero((char *)s,sizeof(*s));
}
/* update the entry */
StrnCpy(s->serv.name,name,sizeof(s->serv.name)-1);
StrnCpy(s->serv.comment,comment,sizeof(s->serv.comment)-1);
strupper(s->serv.name);
s->serv.type = servertype;
s->death_time = servertype ? (ttl?time(NULL)+ttl*3:0) : (time(NULL)-1);
/* for a domain entry, the comment field refers to the server name */
if (s->serv.type & SV_TYPE_DOMAIN_ENUM) strupper(s->serv.comment);
if (newentry)
{
add_server(work, s);
DEBUG(3,("Added "));
}
else
{
DEBUG(3,("Updated "));
}
DEBUG(3,("server entry %s of type %x (%s) to %s %s\n",
name,servertype,comment,
work->work_group,inet_ntoa(d->bcast_ip)));
return(s);
}
/*******************************************************************
expire old servers in the serverlist
******************************************************************/
void expire_servers(time_t t)
{
struct subnet_record *d;
for (d = FIRST_SUBNET; d ; d = NEXT_SUBNET_INCLUDING_WINS(d))
{
struct work_record *work;
for (work = d->workgrouplist; work; work = work->next)
{
remove_old_servers(work, t, False);
}
}
}
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