source/nmbd/nmbd_logonnames.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    NBT netbios routines and daemon - version 2
   5    Copyright (C) Andrew Tridgell 1994-1998
   6    Copyright (C) Luke Kenneth Casson Leighton 1994-1998
   7    Copyright (C) Jeremy Allison 1994-1998
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22
  23 */
  24
  25 #include "includes.h"
  26
  27 extern pstring global_myname;
  28 extern fstring global_myworkgroup;
  29 extern char **my_netbios_names;
  30 extern struct in_addr ipzero;
  31 extern struct in_addr allones_ip;
  32
  33 extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
  34
  35 /****************************************************************************
  36   Fail to become a Logon server on a subnet.
  37   ****************************************************************************/
  38 static void become_logon_server_fail(struct subnet_record *subrec,
  39                                       struct response_record *rrec,
  40                                       struct nmb_name *fail_name)
  41 {
  42   struct work_record *work = find_workgroup_on_subnet(subrec, fail_name->name);
  43   struct server_record *servrec;
  44
  45   if(!work)
  46   {
  47     DEBUG(0,("become_logon_server_fail: Error - cannot find \
  48 workgroup %s on subnet %s\n", fail_name->name, subrec->subnet_name));
  49     return;
  50   }
  51
  52   if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  53   {
  54     DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
  55 in workgroup %s on subnet %s\n",
  56        global_myname, fail_name->name, subrec->subnet_name));
  57     work->log_state = LOGON_NONE;
  58     return;
  59   }
  60
  61   /* Set the state back to LOGON_NONE. */
  62   work->log_state = LOGON_NONE;
  63
  64   servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
  65
  66   DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
  67 workgroup %s on subnet %s. Couldn't register name %s.\n",
  68        work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
  69
  70 }
  71
  72 /****************************************************************************
  73   Become a Logon server on a subnet.
  74   ****************************************************************************/
  75
  76 static void become_logon_server_success(struct subnet_record *subrec,
  77                                         struct userdata_struct *userdata,
  78                                         struct nmb_name *registered_name,
  79                                         uint16 nb_flags,
  80                                         int ttl, struct in_addr registered_ip)
  81 {
  82   struct work_record *work = find_workgroup_on_subnet( subrec, registered_name->name);
  83   struct server_record *servrec;
  84
  85   if(!work)
  86   {
  87     DEBUG(0,("become_logon_server_success: Error - cannot find \
  88 workgroup %s on subnet %s\n", registered_name->name, subrec->subnet_name));
  89     return;
  90   }
  91
  92   if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  93   {
  94     DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
  95 in workgroup %s on subnet %s\n",
  96        global_myname, registered_name->name, subrec->subnet_name));
  97     work->log_state = LOGON_NONE;
  98     return;
  99   }
 100
 101   /* Set the state in the workgroup structure. */
 102   work->log_state = LOGON_SRV; /* Become domain master. */
 103
 104   /* Update our server status. */
 105   servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
 106   /* To allow Win95 policies to load we need to set type domain
 107      controller.
 108    */
 109   servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
 110
 111   /* Tell the namelist writer to write out a change. */
 112   subrec->work_changed = True;
 113
 114   DEBUG(0,("become_logon_server_success: Samba is now a logon server \
 115 for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
 116 }
 117
 118 /*******************************************************************
 119   Become a logon server by attempting to register the WORKGROUP<1c>
 120   group name.
 121 ******************************************************************/
 122
 123 static void become_logon_server(struct subnet_record *subrec,
 124                                 struct work_record *work)
 125 {
 126   DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
 127 on subnet %s\n", work->work_group,subrec->subnet_name));
 128
 129   DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
 130           work->work_group));
 131   work->log_state = LOGON_WAIT;
 132
 133   register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
 134                 become_logon_server_success,
 135                 become_logon_server_fail, NULL);
 136 }
 137
 138 /*****************************************************************************
 139   Add the internet group <1c> logon names by unicast and broadcast.
 140   ****************************************************************************/
 141 void add_logon_names(void)
 142 {
 143   struct subnet_record *subrec;
 144
 145   for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
 146   {
 147     struct work_record *work = find_workgroup_on_subnet(subrec, global_myworkgroup);
 148
 149     if (work && (work->log_state == LOGON_NONE))
 150     {
 151       struct nmb_name nmbname;
 152       make_nmb_name(&nmbname,global_myworkgroup,0x1c);
 153
 154       if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL)
 155       {
 156         if( DEBUGLVL( 0 ) )
 157         {
 158           dbgtext( "add_domain_logon_names:\n" );
 159           dbgtext( "Attempting to become logon server " );
 160           dbgtext( "for workgroup %s ", global_myworkgroup );
 161           dbgtext( "on subnet %s\n", subrec->subnet_name );
 162         }
 163         become_logon_server(subrec, work);
 164       }
 165     }
 166   }
 167 }