source3/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 1994-2003
   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
  34 static void become_logon_server_fail(struct subnet_record *subrec,
  35                                       struct response_record *rrec,
  36                                       struct nmb_name *fail_name)
  37 {
  38         fstring failname;
  39         struct work_record *work;
  40         struct server_record *servrec;
  41
  42         pull_ascii_nstring(failname, sizeof(failname), fail_name->name);
  43         work = find_workgroup_on_subnet(subrec, failname);
  44         if(!work) {
  45                 DEBUG(0,("become_logon_server_fail: Error - cannot find \
  46 workgroup %s on subnet %s\n", failname, subrec->subnet_name));
  47                 return;
  48         }
  49
  50         if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) {
  51                 DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
  52 in workgroup %s on subnet %s\n",
  53                         global_myname(), failname, subrec->subnet_name));
  54                 work->log_state = LOGON_NONE;
  55                 return;
  56         }
  57
  58         /* Set the state back to LOGON_NONE. */
  59         work->log_state = LOGON_NONE;
  60
  61         servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
  62
  63         DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
  64 workgroup %s on subnet %s. Couldn't register name %s.\n",
  65                 work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
  66
  67 }
  68
  69 /****************************************************************************
  70   Become a Logon server on a subnet.
  71   ****************************************************************************/
  72
  73 static void become_logon_server_success(struct subnet_record *subrec,
  74                                         struct userdata_struct *userdata,
  75                                         struct nmb_name *registered_name,
  76                                         uint16 nb_flags,
  77                                         int ttl, struct in_addr registered_ip)
  78 {
  79         fstring reg_name;
  80         struct work_record *work;
  81         struct server_record *servrec;
  82
  83         pull_ascii_nstring(reg_name, sizeof(reg_name), registered_name->name);
  84         work = find_workgroup_on_subnet( subrec, reg_name);
  85         if(!work) {
  86                 DEBUG(0,("become_logon_server_success: Error - cannot find \
  87 workgroup %s on subnet %s\n", reg_name, subrec->subnet_name));
  88                 return;
  89         }
  90
  91         if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) {
  92                 DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
  93 in workgroup %s on subnet %s\n",
  94                         global_myname(), reg_name, subrec->subnet_name));
  95                 work->log_state = LOGON_NONE;
  96                 return;
  97         }
  98
  99         /* Set the state in the workgroup structure. */
 100         work->log_state = LOGON_SRV; /* Become domain master. */
 101
 102         /* Update our server status. */
 103         servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
 104         /* To allow Win95 policies to load we need to set type domain
 105                 controller.
 106         */
 107         servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
 108
 109         /* Tell the namelist writer to write out a change. */
 110         subrec->work_changed = True;
 111
 112         /*
 113          * Add the WORKGROUP<1C> name to the UNICAST subnet with the IP address
 114          * for this subnet so we will respond to queries on this name.
 115          */
 116
 117         {
 118                 struct nmb_name nmbname;
 119                 make_nmb_name(&nmbname,lp_workgroup(),0x1c);
 120                 insert_permanent_name_into_unicast(subrec, &nmbname, 0x1c);
 121         }
 122
 123         DEBUG(0,("become_logon_server_success: Samba is now a logon server \
 124 for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
 125 }
 126
 127 /*******************************************************************
 128   Become a logon server by attempting to register the WORKGROUP<1c>
 129   group name.
 130 ******************************************************************/
 131
 132 static void become_logon_server(struct subnet_record *subrec,
 133                                 struct work_record *work)
 134 {
 135         DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
 136 on subnet %s\n", work->work_group,subrec->subnet_name));
 137
 138         DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
 139                 work->work_group));
 140         work->log_state = LOGON_WAIT;
 141
 142         register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
 143                         become_logon_server_success,
 144                         become_logon_server_fail, NULL);
 145 }
 146
 147 /*****************************************************************************
 148   Add the internet group <1c> logon names by unicast and broadcast.
 149   ****************************************************************************/
 150
 151 void add_logon_names(void)
 152 {
 153         struct subnet_record *subrec;
 154
 155         for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
 156                 struct work_record *work = find_workgroup_on_subnet(subrec, lp_workgroup());
 157
 158                 if (work && (work->log_state == LOGON_NONE)) {
 159                         struct nmb_name nmbname;
 160                         make_nmb_name(&nmbname,lp_workgroup(),0x1c);
 161
 162                         if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL) {
 163                                 if( DEBUGLVL( 0 ) ) {
 164                                         dbgtext( "add_domain_logon_names:\n" );
 165                                         dbgtext( "Attempting to become logon server " );
 166                                         dbgtext( "for workgroup %s ", lp_workgroup() );
 167                                         dbgtext( "on subnet %s\n", subrec->subnet_name );
 168                                 }
 169                                 become_logon_server(subrec, work);
 170                         }
 171                 }
 172         }
 173 }