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