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 allones_ip;
  31
  32 extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
  33
  34 /****************************************************************************
  35   Fail to become a Logon server on a subnet.
  36   ****************************************************************************/
  37 static void become_logon_server_fail(struct subnet_record *subrec,
  38                                       struct response_record *rrec,
  39                                       struct nmb_name *fail_name)
  40 {
  41   struct work_record *work = find_workgroup_on_subnet(subrec, fail_name->name);
  42   struct server_record *servrec;
  43
  44   if(!work)
  45   {
  46     DEBUG(0,("become_logon_server_fail: Error - cannot find \
  47 workgroup %s on subnet %s\n", fail_name->name, subrec->subnet_name));
  48     return;
  49   }
  50
  51   if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  52   {
  53     DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
  54 in workgroup %s on subnet %s\n",
  55        global_myname, fail_name->name, subrec->subnet_name));
  56     work->log_state = LOGON_NONE;
  57     return;
  58   }
  59
  60   /* Set the state back to LOGON_NONE. */
  61   work->log_state = LOGON_NONE;
  62
  63   servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
  64
  65   DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
  66 workgroup %s on subnet %s. Couldn't register name %s.\n",
  67        work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
  68
  69 }
  70
  71 /****************************************************************************
  72   Become a Logon server on a subnet.
  73   ****************************************************************************/
  74
  75 static void become_logon_server_success(struct subnet_record *subrec,
  76                                         struct userdata_struct *userdata,
  77                                         struct nmb_name *registered_name,
  78                                         uint16 nb_flags,
  79                                         int ttl, struct in_addr registered_ip)
  80 {
  81   struct work_record *work = find_workgroup_on_subnet( subrec, registered_name->name);
  82   struct server_record *servrec;
  83
  84   if(!work)
  85   {
  86     DEBUG(0,("become_logon_server_success: Error - cannot find \
  87 workgroup %s on subnet %s\n", registered_name->name, subrec->subnet_name));
  88     return;
  89   }
  90
  91   if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  92   {
  93     DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
  94 in workgroup %s on subnet %s\n",
  95        global_myname, registered_name->name, subrec->subnet_name));
  96     work->log_state = LOGON_NONE;
  97     return;
  98   }
  99
 100   /* Set the state in the workgroup structure. */
 101   work->log_state = LOGON_SRV; /* Become domain master. */
 102
 103   /* Update our server status. */
 104   servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
 105   /* To allow Win95 policies to load we need to set type domain
 106      controller.
 107    */
 108   servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
 109
 110   /* Tell the namelist writer to write out a change. */
 111   subrec->work_changed = True;
 112
 113   DEBUG(0,("become_logon_server_success: Samba is now a logon server \
 114 for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
 115 }
 116
 117 /*******************************************************************
 118   Become a logon server by attempting to register the WORKGROUP<1c>
 119   group name.
 120 ******************************************************************/
 121
 122 static void become_logon_server(struct subnet_record *subrec,
 123                                 struct work_record *work)
 124 {
 125   DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
 126 on subnet %s\n", work->work_group,subrec->subnet_name));
 127
 128   DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
 129           work->work_group));
 130   work->log_state = LOGON_WAIT;
 131
 132   register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
 133                 become_logon_server_success,
 134                 become_logon_server_fail, NULL);
 135 }
 136
 137 /*****************************************************************************
 138   Add the internet group <1c> logon names by unicast and broadcast.
 139   ****************************************************************************/
 140 void add_logon_names(void)
 141 {
 142   struct subnet_record *subrec;
 143
 144   for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
 145   {
 146     struct work_record *work = find_workgroup_on_subnet(subrec, global_myworkgroup);
 147
 148     if (work && (work->log_state == LOGON_NONE))
 149     {
 150       struct nmb_name nmbname;
 151       make_nmb_name(&nmbname,global_myworkgroup,0x1c);
 152
 153       if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL)
 154       {
 155         if( DEBUGLVL( 0 ) )
 156         {
 157           dbgtext( "add_domain_logon_names:\n" );
 158           dbgtext( "Attempting to become logon server " );
 159           dbgtext( "for workgroup %s ", global_myworkgroup );
 160           dbgtext( "on subnet %s\n", subrec->subnet_name );
 161         }
 162         become_logon_server(subrec, work);
 163       }
 164     }
 165   }
 166 }