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samba-mirror/source3/nmbd/nmbd_workgroupdb.c
Tim Potter 9327793ff5 Merge of #include <smb.h> removals.
(This used to be commit bdb6e76ab5)
2002-12-12 02:56:15 +00:00

343 lines
11 KiB
C

/*
Unix SMB/CIFS implementation.
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
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"
extern int ClientNMB;
extern uint16 samba_nb_type;
int workgroup_count = 0; /* unique index key: one for each workgroup */
/****************************************************************************
Add a workgroup into the list.
**************************************************************************/
static void add_workgroup(struct subnet_record *subrec, struct work_record *work)
{
work->subnet = subrec;
DLIST_ADD(subrec->workgrouplist, work);
subrec->work_changed = True;
}
/****************************************************************************
Create an empty workgroup.
**************************************************************************/
static struct work_record *create_workgroup(const char *name, int ttl)
{
struct work_record *work;
struct subnet_record *subrec;
int t = -1;
if((work = (struct work_record *)malloc(sizeof(*work))) == NULL)
{
DEBUG(0,("create_workgroup: malloc fail !\n"));
return NULL;
}
memset((char *)work, '\0', sizeof(*work));
StrnCpy(work->work_group,name,sizeof(work->work_group)-1);
work->serverlist = NULL;
work->RunningElection = False;
work->ElectionCount = 0;
work->announce_interval = 0;
work->needelection = False;
work->needannounce = True;
work->lastannounce_time = time(NULL);
work->mst_state = lp_local_master() ? MST_POTENTIAL : MST_NONE;
work->dom_state = DOMAIN_NONE;
work->log_state = LOGON_NONE;
work->death_time = (ttl != PERMANENT_TTL) ? time(NULL)+(ttl*3) : PERMANENT_TTL;
/* Make sure all token representations of workgroups are unique. */
for (subrec = FIRST_SUBNET; subrec && (t == -1);
subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
{
struct work_record *w;
for (w = subrec->workgrouplist; w && t == -1; w = w->next)
{
if (strequal(w->work_group, work->work_group))
t = w->token;
}
}
if (t == -1)
work->token = ++workgroup_count;
else
work->token = t;
/* No known local master browser as yet. */
*work->local_master_browser_name = '\0';
/* No known domain master browser as yet. */
*work->dmb_name.name = '\0';
zero_ip(&work->dmb_addr);
/* WfWg uses 01040b01 */
/* Win95 uses 01041501 */
/* NTAS uses ???????? */
work->ElectionCriterion = (MAINTAIN_LIST)|(BROWSER_ELECTION_VERSION<<8);
work->ElectionCriterion |= (lp_os_level() << 24);
if (lp_domain_master())
work->ElectionCriterion |= 0x80;
return work;
}
/*******************************************************************
Remove a workgroup.
******************************************************************/
static struct work_record *remove_workgroup_from_subnet(struct subnet_record *subrec,
struct work_record *work)
{
struct work_record *ret_work = NULL;
DEBUG(3,("remove_workgroup: Removing workgroup %s\n", work->work_group));
ret_work = work->next;
remove_all_servers(work);
if (!work->serverlist)
{
if (work->prev)
work->prev->next = work->next;
if (work->next)
work->next->prev = work->prev;
if (subrec->workgrouplist == work)
subrec->workgrouplist = work->next;
ZERO_STRUCTP(work);
SAFE_FREE(work);
}
subrec->work_changed = True;
return ret_work;
}
/****************************************************************************
Find a workgroup in the workgroup list of a subnet.
**************************************************************************/
struct work_record *find_workgroup_on_subnet(struct subnet_record *subrec,
const char *name)
{
struct work_record *ret;
DEBUG(4, ("find_workgroup_on_subnet: workgroup search for %s on subnet %s: ",
name, subrec->subnet_name));
for (ret = subrec->workgrouplist; ret; ret = ret->next)
{
if (!strcmp(ret->work_group,name))
{
DEBUGADD(4, ("found.\n"));
return(ret);
}
}
DEBUGADD(4, ("not found.\n"));
return NULL;
}
/****************************************************************************
Create a workgroup in the workgroup list of the subnet.
**************************************************************************/
struct work_record *create_workgroup_on_subnet(struct subnet_record *subrec,
const char *name, int ttl)
{
struct work_record *work = NULL;
DEBUG(4,("create_workgroup_on_subnet: creating group %s on subnet %s\n",
name, subrec->subnet_name));
if ((work = create_workgroup(name, ttl)))
{
add_workgroup(subrec, work);
subrec->work_changed = True;
return(work);
}
return NULL;
}
/****************************************************************************
Update a workgroup ttl.
**************************************************************************/
void update_workgroup_ttl(struct work_record *work, int ttl)
{
if(work->death_time != PERMANENT_TTL)
work->death_time = time(NULL)+(ttl*3);
work->subnet->work_changed = True;
}
/****************************************************************************
Fail function called if we cannot register the WORKGROUP<0> and
WORKGROUP<1e> names on the net.
**************************************************************************/
static void fail_register(struct subnet_record *subrec, struct response_record *rrec,
struct nmb_name *nmbname)
{
DEBUG(0,("fail_register: Failed to register name %s on subnet %s.\n",
nmb_namestr(nmbname), subrec->subnet_name));
}
/****************************************************************************
If the workgroup is our primary workgroup, add the required names to it.
**************************************************************************/
void initiate_myworkgroup_startup(struct subnet_record *subrec, struct work_record *work)
{
int i;
if(!strequal(lp_workgroup(), work->work_group))
return;
/* If this is a broadcast subnet then start elections on it
if we are so configured. */
if ((subrec != unicast_subnet) && (subrec != remote_broadcast_subnet) &&
(subrec != wins_server_subnet) && lp_preferred_master() &&
lp_local_master())
{
DEBUG(3, ("initiate_myworkgroup_startup: preferred master startup for \
workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
work->needelection = True;
work->ElectionCriterion |= (1<<3);
}
/* Register the WORKGROUP<0> and WORKGROUP<1e> names on the network. */
register_name(subrec,lp_workgroup(),0x0,samba_nb_type|NB_GROUP,
NULL,
fail_register,NULL);
register_name(subrec,lp_workgroup(),0x1e,samba_nb_type|NB_GROUP,
NULL,
fail_register,NULL);
for( i = 0; my_netbios_names(i); i++)
{
const char *name = my_netbios_names(i);
int stype = lp_default_server_announce() | (lp_local_master() ?
SV_TYPE_POTENTIAL_BROWSER : 0 );
if(!strequal(global_myname(), name))
stype &= ~(SV_TYPE_MASTER_BROWSER|SV_TYPE_POTENTIAL_BROWSER|
SV_TYPE_DOMAIN_MASTER|SV_TYPE_DOMAIN_MEMBER);
create_server_on_workgroup(work,name,stype|SV_TYPE_LOCAL_LIST_ONLY,
PERMANENT_TTL,
string_truncate(lp_serverstring(), MAX_SERVER_STRING_LENGTH));
DEBUG(3,("initiate_myworkgroup_startup: Added server name entry %s \
on subnet %s\n", name, subrec->subnet_name));
}
}
/****************************************************************************
Dump a copy of the workgroup database into the log file.
**************************************************************************/
void dump_workgroups(BOOL force_write)
{
struct subnet_record *subrec;
int debuglevel = force_write ? 0 : 4;
for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
{
if (subrec->workgrouplist)
{
struct work_record *work;
if( DEBUGLVL( debuglevel ) )
{
dbgtext( "dump_workgroups()\n " );
dbgtext( "dump workgroup on subnet %15s: ", subrec->subnet_name );
dbgtext( "netmask=%15s:\n", inet_ntoa(subrec->mask_ip) );
}
for (work = subrec->workgrouplist; work; work = work->next)
{
DEBUGADD( debuglevel, ( "\t%s(%d) current master browser = %s\n",
work->work_group,
work->token,
*work->local_master_browser_name
? work->local_master_browser_name : "UNKNOWN" ) );
if (work->serverlist)
{
struct server_record *servrec;
for (servrec = work->serverlist; servrec; servrec = servrec->next)
{
DEBUGADD( debuglevel, ( "\t\t%s %8x (%s)\n",
servrec->serv.name,
servrec->serv.type,
servrec->serv.comment ) );
}
}
}
}
}
}
/****************************************************************************
Expire any dead servers on all workgroups. If the workgroup has expired
remove it.
**************************************************************************/
void expire_workgroups_and_servers(time_t t)
{
struct subnet_record *subrec;
for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
{
struct work_record *work;
struct work_record *nextwork;
for (work = subrec->workgrouplist; work; work = nextwork)
{
nextwork = work->next;
expire_servers(work, t);
if ((work->serverlist == NULL) && (work->death_time != PERMANENT_TTL) &&
((t == -1) || (work->death_time < t)))
{
DEBUG(3,("expire_workgroups_and_servers: Removing timed out workgroup %s\n",
work->work_group));
remove_workgroup_from_subnet(subrec, work);
}
}
}
}