source/nmbd/nmbd_logonnames.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NBT netbios routines and daemon - version 2
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Luke Kenneth Casson Leighton 1994-1998
   6    Copyright (C) Jeremy Allison 1994-1998
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23
  24 #include "includes.h"
  25
  26 extern pstring global_myname;
  27 extern fstring global_myworkgroup;
  28 extern char **my_netbios_names;
  29 extern struct in_addr allones_ip;
  30
  31 extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
  32
  33 /****************************************************************************
  34   Fail to become a Logon server on a subnet.
  35   ****************************************************************************/
  36 static void become_logon_server_fail(struct subnet_record *subrec,
  37                                       struct response_record *rrec,
  38                                       struct nmb_name *fail_name)
  39 {
  40   struct work_record *work = find_workgroup_on_subnet(subrec, fail_name->name);
  41   struct server_record *servrec;
  42
  43   if(!work)
  44   {
  45     DEBUG(0,("become_logon_server_fail: Error - cannot find \
  46 workgroup %s on subnet %s\n", fail_name->name, subrec->subnet_name));
  47     return;
  48   }
  49
  50   if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  51   {
  52     DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
  53 in workgroup %s on subnet %s\n",
  54        global_myname, fail_name->name, subrec->subnet_name));
  55     work->log_state = LOGON_NONE;
  56     return;
  57   }
  58
  59   /* Set the state back to LOGON_NONE. */
  60   work->log_state = LOGON_NONE;
  61
  62   servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
  63
  64   DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
  65 workgroup %s on subnet %s. Couldn't register name %s.\n",
  66        work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
  67
  68 }
  69
  70 /****************************************************************************
  71   Become a Logon server on a subnet.
  72   ****************************************************************************/
  73
  74 static void become_logon_server_success(struct subnet_record *subrec,
  75                                         struct userdata_struct *userdata,
  76                                         struct nmb_name *registered_name,
  77                                         uint16 nb_flags,
  78                                         int ttl, struct in_addr registered_ip)
  79 {
  80   struct work_record *work = find_workgroup_on_subnet( subrec, registered_name->name);
  81   struct server_record *servrec;
  82
  83   if(!work)
  84   {
  85     DEBUG(0,("become_logon_server_success: Error - cannot find \
  86 workgroup %s on subnet %s\n", registered_name->name, subrec->subnet_name));
  87     return;
  88   }
  89
  90   if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  91   {
  92     DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
  93 in workgroup %s on subnet %s\n",
  94        global_myname, registered_name->name, subrec->subnet_name));
  95     work->log_state = LOGON_NONE;
  96     return;
  97   }
  98
  99   /* Set the state in the workgroup structure. */
 100   work->log_state = LOGON_SRV; /* Become domain master. */
 101
 102   /* Update our server status. */
 103   servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
 104   /* To allow Win95 policies to load we need to set type domain
 105      controller.
 106    */
 107   servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
 108
 109   /* Tell the namelist writer to write out a change. */
 110   subrec->work_changed = True;
 111
 112   DEBUG(0,("become_logon_server_success: Samba is now a logon server \
 113 for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
 114 }
 115
 116 /*******************************************************************
 117   Become a logon server by attempting to register the WORKGROUP<1c>
 118   group name.
 119 ******************************************************************/
 120
 121 static void become_logon_server(struct subnet_record *subrec,
 122                                 struct work_record *work)
 123 {
 124   DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
 125 on subnet %s\n", work->work_group,subrec->subnet_name));
 126
 127   DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
 128           work->work_group));
 129   work->log_state = LOGON_WAIT;
 130
 131   register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
 132                 become_logon_server_success,
 133                 become_logon_server_fail, NULL);
 134 }
 135
 136 /*****************************************************************************
 137   Add the internet group <1c> logon names by unicast and broadcast.
 138   ****************************************************************************/
 139 void add_logon_names(void)
 140 {
 141   struct subnet_record *subrec;
 142
 143   for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
 144   {
 145     struct work_record *work = find_workgroup_on_subnet(subrec, global_myworkgroup);
 146
 147     if (work && (work->log_state == LOGON_NONE))
 148     {
 149       struct nmb_name nmbname;
 150       make_nmb_name(&nmbname,global_myworkgroup,0x1c);
 151
 152       if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL)
 153       {
 154         if( DEBUGLVL( 0 ) )
 155         {
 156           dbgtext( "add_domain_logon_names:\n" );
 157           dbgtext( "Attempting to become logon server " );
 158           dbgtext( "for workgroup %s ", global_myworkgroup );
 159           dbgtext( "on subnet %s\n", subrec->subnet_name );
 160         }
 161         become_logon_server(subrec, work);
 162       }
 163     }
 164   }
 165 }