source3/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 int DEBUGLEVEL;
  28
  29 extern pstring scope;
  30 extern pstring global_myname;
  31 extern fstring global_myworkgroup;
  32 extern char **my_netbios_names;
  33 extern struct in_addr ipzero;
  34 extern struct in_addr allones_ip;
  35
  36 extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
  37
  38 /****************************************************************************
  39   Fail to become a Logon server on a subnet.
  40   ****************************************************************************/
  41 static void become_logon_server_fail(struct subnet_record *subrec,
  42                                       struct response_record *rrec,
  43                                       struct nmb_name *fail_name)
  44 {
  45   struct work_record *work = find_workgroup_on_subnet(subrec, fail_name->name);
  46   struct server_record *servrec;
  47
  48   if(!work)
  49   {
  50     DEBUG(0,("become_logon_server_fail: Error - cannot find \
  51 workgroup %s on subnet %s\n", fail_name->name, subrec->subnet_name));
  52     return;
  53   }
  54
  55   if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  56   {
  57     DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
  58 in workgroup %s on subnet %s\n",
  59        global_myname, fail_name->name, subrec->subnet_name));
  60     work->log_state = LOGON_NONE;
  61     return;
  62   }
  63
  64   /* Set the state back to LOGON_NONE. */
  65   work->log_state = LOGON_NONE;
  66
  67   servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
  68
  69   DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
  70 workgroup %s on subnet %s. Couldn't register name %s.\n",
  71        work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
  72
  73 }
  74
  75 /****************************************************************************
  76   Become a Logon server on a subnet.
  77   ****************************************************************************/
  78
  79 static void become_logon_server_success(struct subnet_record *subrec,
  80                                         struct userdata_struct *userdata,
  81                                         struct nmb_name *registered_name,
  82                                         uint16 nb_flags,
  83                                         int ttl, struct in_addr registered_ip)
  84 {
  85   struct work_record *work = find_workgroup_on_subnet( subrec, registered_name->name);
  86   struct server_record *servrec;
  87
  88   if(!work)
  89   {
  90     DEBUG(0,("become_logon_server_success: Error - cannot find \
  91 workgroup %s on subnet %s\n", registered_name->name, subrec->subnet_name));
  92     return;
  93   }
  94
  95   if((servrec = find_server_in_workgroup( work, global_myname)) == NULL)
  96   {
  97     DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
  98 in workgroup %s on subnet %s\n",
  99        global_myname, registered_name->name, subrec->subnet_name));
 100     work->log_state = LOGON_NONE;
 101     return;
 102   }
 103
 104   /* Set the state in the workgroup structure. */
 105   work->log_state = LOGON_SRV; /* Become domain master. */
 106
 107   /* Update our server status. */
 108   servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
 109   /* To allow Win95 policies to load we need to set type domain
 110      controller.
 111    */
 112   servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
 113
 114   /* Tell the namelist writer to write out a change. */
 115   subrec->work_changed = True;
 116
 117   DEBUG(0,("become_logon_server_success: Samba is now a logon server \
 118 for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
 119 }
 120
 121 /*******************************************************************
 122   Become a logon server by attempting to register the WORKGROUP<1c>
 123   group name.
 124 ******************************************************************/
 125
 126 static void become_logon_server(struct subnet_record *subrec,
 127                                 struct work_record *work)
 128 {
 129   DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
 130 on subnet %s\n", work->work_group,subrec->subnet_name));
 131
 132   DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
 133           work->work_group));
 134   work->log_state = LOGON_WAIT;
 135
 136   register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
 137                 become_logon_server_success,
 138                 become_logon_server_fail, NULL);
 139 }
 140
 141 /*****************************************************************************
 142   Add the internet group <1c> logon names by unicast and broadcast.
 143   ****************************************************************************/
 144 void add_logon_names(void)
 145 {
 146   struct subnet_record *subrec;
 147
 148   for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
 149   {
 150     struct work_record *work = find_workgroup_on_subnet(subrec, global_myworkgroup);
 151
 152     if (work && (work->log_state == LOGON_NONE))
 153     {
 154       struct nmb_name nmbname;
 155       make_nmb_name(&nmbname,global_myworkgroup,0x1c,scope);
 156
 157       if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL)
 158       {
 159         if( DEBUGLVL( 0 ) )
 160         {
 161           dbgtext( "add_domain_logon_names:\n" );
 162           dbgtext( "Attempting to become logon server " );
 163           dbgtext( "for workgroup %s ", global_myworkgroup );
 164           dbgtext( "on subnet %s\n", subrec->subnet_name );
 165         }
 166         become_logon_server(subrec, work);
 167       }
 168     }
 169   }
 170 }