samba-mirror/source3/nmbd/nmbd_logonnames.c

/* 
   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
   
   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 DEBUGLEVEL;

extern pstring scope;
extern pstring global_myname;
extern fstring global_myworkgroup;
extern char **my_netbios_names;
extern struct in_addr ipzero;
extern struct in_addr allones_ip;

extern uint16 samba_nb_type; /* Samba's NetBIOS type. */

/****************************************************************************
  Fail to become a Logon server on a subnet.
  ****************************************************************************/
static void become_logon_server_fail(struct subnet_record *subrec,
                                      struct response_record *rrec,
                                      struct nmb_name *fail_name)
{
  struct work_record *work = find_workgroup_on_subnet(subrec, fail_name->name);
  struct server_record *servrec;

  if(!work)
  {
    DEBUG(0,("become_logon_server_fail: Error - cannot find \
workgroup %s on subnet %s\n", fail_name->name, subrec->subnet_name));
    return;
  }

  if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  {
    DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
in workgroup %s on subnet %s\n",
       global_myname, fail_name->name, subrec->subnet_name));
    work->log_state = LOGON_NONE;
    return;
  }

  /* Set the state back to LOGON_NONE. */
  work->log_state = LOGON_NONE;

  servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;

  DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
workgroup %s on subnet %s. Couldn't register name %s.\n",
       work->work_group, subrec->subnet_name, namestr(fail_name)));

}

/****************************************************************************
  Become a Logon server on a subnet.
  ****************************************************************************/

static void become_logon_server_success(struct subnet_record *subrec,
                                        struct userdata_struct *userdata,
                                        struct nmb_name *registered_name,
                                        uint16 nb_flags,
                                        int ttl, struct in_addr registered_ip)
{
  struct work_record *work = find_workgroup_on_subnet( subrec, registered_name->name);
  struct server_record *servrec;

  if(!work)
  {
    DEBUG(0,("become_logon_server_success: Error - cannot find \
workgroup %s on subnet %s\n", registered_name->name, subrec->subnet_name));
    return;
  }

  if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  {
    DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
in workgroup %s on subnet %s\n",
       global_myname, registered_name->name, subrec->subnet_name));
    work->log_state = LOGON_NONE;
    return;
  }

  /* Set the state in the workgroup structure. */
  work->log_state = LOGON_SRV; /* Become domain master. */

  /* Update our server status. */
  servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
  /* To allow Win95 policies to load we need to set type domain
     controller.
   */
  servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;

  /* Tell the namelist writer to write out a change. */
  subrec->work_changed = True;

  DEBUG(0,("become_logon_server_success: Samba is now a logon server\
for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
}

/*******************************************************************
  Become a logon server by attempting to register the WORKGROUP<1c>
  group name.
******************************************************************/

static void become_logon_server(struct subnet_record *subrec,
                                struct work_record *work)
{
  DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
on subnet %s\n", work->work_group,subrec->subnet_name));

  DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
          work->work_group));
  work->log_state = LOGON_WAIT;

  register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
                become_logon_server_success,
                become_logon_server_fail, NULL);
}

/*****************************************************************************
  Add the internet group <1c> logon names by unicast and broadcast.
  ****************************************************************************/
void add_logon_names(void)
{
  struct subnet_record *subrec;

  for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
  {
    struct work_record *work = find_workgroup_on_subnet(subrec, global_myworkgroup);

    if (work && (work->log_state == LOGON_NONE))
    {
      struct nmb_name nmbname;
      make_nmb_name(&nmbname,global_myworkgroup,0x1c,scope);

      if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL)
      {
        DEBUG(0,("add_domain_logon_names: At time %s attempting to become \
logon server for workgroup %s on subnet %s\n", timestring(), global_myworkgroup, 
                  subrec->subnet_name));
        become_logon_server(subrec, work);
      }
    }
  }
}