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 struct in_addr allones_ip;
  27
  28 extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
  29
  30 /****************************************************************************
  31   Fail to become a Logon server on a subnet.
  32   ****************************************************************************/
  33 static void become_logon_server_fail(struct subnet_record *subrec,
  34                                       struct response_record *rrec,
  35                                       struct nmb_name *fail_name)
  36 {
  37   struct work_record *work = find_workgroup_on_subnet(subrec, fail_name->name);
  38   struct server_record *servrec;
  39
  40   if(!work)
  41   {
  42     DEBUG(0,("become_logon_server_fail: Error - cannot find \
  43 workgroup %s on subnet %s\n", fail_name->name, subrec->subnet_name));
  44     return;
  45   }
  46
  47   if((servrec = find_server_in_workgroup( work, lp_netbios_name())) == NULL)
  48   {
  49     DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
  50 in workgroup %s on subnet %s\n",
  51        lp_netbios_name(), fail_name->name, subrec->subnet_name));
  52     work->log_state = LOGON_NONE;
  53     return;
  54   }
  55
  56   /* Set the state back to LOGON_NONE. */
  57   work->log_state = LOGON_NONE;
  58
  59   servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
  60
  61   DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
  62 workgroup %s on subnet %s. Couldn't register name %s.\n",
  63        work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
  64
  65 }
  66
  67 /****************************************************************************
  68   Become a Logon server on a subnet.
  69   ****************************************************************************/
  70
  71 static void become_logon_server_success(struct subnet_record *subrec,
  72                                         struct userdata_struct *userdata,
  73                                         struct nmb_name *registered_name,
  74                                         uint16 nb_flags,
  75                                         int ttl, struct in_addr registered_ip)
  76 {
  77   struct work_record *work = find_workgroup_on_subnet( subrec, registered_name->name);
  78   struct server_record *servrec;
  79
  80   if(!work)
  81   {
  82     DEBUG(0,("become_logon_server_success: Error - cannot find \
  83 workgroup %s on subnet %s\n", registered_name->name, subrec->subnet_name));
  84     return;
  85   }
  86
  87   if((servrec = find_server_in_workgroup( work, lp_netbios_name())) == NULL)
  88   {
  89     DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
  90 in workgroup %s on subnet %s\n",
  91        lp_netbios_name(), registered_name->name, subrec->subnet_name));
  92     work->log_state = LOGON_NONE;
  93     return;
  94   }
  95
  96   /* Set the state in the workgroup structure. */
  97   work->log_state = LOGON_SRV; /* Become domain master. */
  98
  99   /* Update our server status. */
 100   servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
 101   /* To allow Win95 policies to load we need to set type domain
 102      controller.
 103    */
 104   servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
 105
 106   /* Tell the namelist writer to write out a change. */
 107   subrec->work_changed = True;
 108
 109   /*
 110    * Add the WORKGROUP<1C> name to the UNICAST subnet with the IP address
 111    * for this subnet so we will respond to queries on this name.
 112    */
 113   {
 114           struct nmb_name nmbname;
 115           make_nmb_name(&nmbname,lp_workgroup(),0x1c);
 116           insert_permanent_name_into_unicast(subrec, &nmbname, 0x1c);
 117   }
 118
 119   DEBUG(0,("become_logon_server_success: Samba is now a logon server \
 120 for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
 121 }
 122
 123 /*******************************************************************
 124   Become a logon server by attempting to register the WORKGROUP<1c>
 125   group name.
 126 ******************************************************************/
 127
 128 static void become_logon_server(struct subnet_record *subrec,
 129                                 struct work_record *work)
 130 {
 131   DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
 132 on subnet %s\n", work->work_group,subrec->subnet_name));
 133
 134   DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
 135           work->work_group));
 136   work->log_state = LOGON_WAIT;
 137
 138   register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
 139                 become_logon_server_success,
 140                 become_logon_server_fail, NULL);
 141 }
 142
 143 /*****************************************************************************
 144   Add the internet group <1c> logon names by unicast and broadcast.
 145   ****************************************************************************/
 146 void add_logon_names(void)
 147 {
 148   struct subnet_record *subrec;
 149
 150   for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
 151   {
 152     struct work_record *work = find_workgroup_on_subnet(subrec, lp_workgroup());
 153
 154     if (work && (work->log_state == LOGON_NONE))
 155     {
 156       struct nmb_name nmbname;
 157       make_nmb_name(&nmbname,lp_workgroup(),0x1c);
 158
 159       if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL)
 160       {
 161         if( DEBUGLVL( 0 ) )
 162         {
 163           dbgtext( "add_domain_logon_names:\n" );
 164           dbgtext( "Attempting to become logon server " );
 165           dbgtext( "for workgroup %s ", lp_workgroup() );
 166           dbgtext( "on subnet %s\n", subrec->subnet_name );
 167         }
 168         become_logon_server(subrec, work);
 169       }
 170     }
 171   }
 172 }