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 3 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, see <http://www.gnu.org/licenses/>.
  20
  21 */
  22
  23 #include "includes.h"
  24 #include "../librpc/gen_ndr/svcctl.h"
  25 #include "nmbd/nmbd.h"
  26
  27 extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
  28
  29 /****************************************************************************
  30   Fail to become a Logon server on a subnet.
  31 ****************************************************************************/
  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         unstring failname;
  38         struct work_record *work;
  39         struct server_record *servrec;
  40
  41         pull_ascii_nstring(failname, sizeof(failname), fail_name->name);
  42         work = find_workgroup_on_subnet(subrec, failname);
  43         if(!work) {
  44                 DEBUG(0,("become_logon_server_fail: Error - cannot find \
  45 workgroup %s on subnet %s\n", failname, subrec->subnet_name));
  46                 return;
  47         }
  48
  49         if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) {
  50                 DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
  51 in workgroup %s on subnet %s\n",
  52                         global_myname(), failname, subrec->subnet_name));
  53                 work->log_state = LOGON_NONE;
  54                 return;
  55         }
  56
  57         /* Set the state back to LOGON_NONE. */
  58         work->log_state = LOGON_NONE;
  59
  60         servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
  61
  62         DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
  63 workgroup %s on subnet %s. Couldn't register name %s.\n",
  64                 work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
  65
  66 }
  67
  68 /****************************************************************************
  69   Become a Logon server on a subnet.
  70   ****************************************************************************/
  71
  72 static void become_logon_server_success(struct subnet_record *subrec,
  73                                         struct userdata_struct *userdata,
  74                                         struct nmb_name *registered_name,
  75                                         uint16 nb_flags,
  76                                         int ttl, struct in_addr registered_ip)
  77 {
  78         unstring reg_name;
  79         struct work_record *work;
  80         struct server_record *servrec;
  81
  82         pull_ascii_nstring(reg_name, sizeof(reg_name), registered_name->name);
  83         work = find_workgroup_on_subnet( subrec, reg_name);
  84         if(!work) {
  85                 DEBUG(0,("become_logon_server_success: Error - cannot find \
  86 workgroup %s on subnet %s\n", reg_name, subrec->subnet_name));
  87                 return;
  88         }
  89
  90         if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) {
  91                 DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
  92 in workgroup %s on subnet %s\n",
  93                         global_myname(), reg_name, subrec->subnet_name));
  94                 work->log_state = LOGON_NONE;
  95                 return;
  96         }
  97
  98         /* Set the state in the workgroup structure. */
  99         work->log_state = LOGON_SRV; /* Become domain master. */
 100
 101         /* Update our server status. */
 102         servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
 103         /* To allow Win95 policies to load we need to set type domain
 104                 controller.
 105         */
 106         servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
 107
 108         /* Tell the namelist writer to write out a change. */
 109         subrec->work_changed = True;
 110
 111         /*
 112          * Add the WORKGROUP<1C> name to the UNICAST subnet with the IP address
 113          * for this subnet so we will respond to queries on this name.
 114          */
 115
 116         {
 117                 struct nmb_name nmbname;
 118                 make_nmb_name(&nmbname,lp_workgroup(),0x1c);
 119                 insert_permanent_name_into_unicast(subrec, &nmbname, 0x1c);
 120         }
 121
 122         DEBUG(0,("become_logon_server_success: Samba is now a logon server \
 123 for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
 124 }
 125
 126 /*******************************************************************
 127   Become a logon server by attempting to register the WORKGROUP<1c>
 128   group name.
 129 ******************************************************************/
 130
 131 static void become_logon_server(struct subnet_record *subrec,
 132                                 struct work_record *work)
 133 {
 134         DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
 135 on subnet %s\n", work->work_group,subrec->subnet_name));
 136
 137         DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
 138                 work->work_group));
 139         work->log_state = LOGON_WAIT;
 140
 141         register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
 142                         become_logon_server_success,
 143                         become_logon_server_fail, NULL);
 144 }
 145
 146 /*****************************************************************************
 147   Add the internet group <1c> logon names by unicast and broadcast.
 148   ****************************************************************************/
 149
 150 void add_logon_names(void)
 151 {
 152         struct subnet_record *subrec;
 153
 154         for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
 155                 struct work_record *work = find_workgroup_on_subnet(subrec, lp_workgroup());
 156
 157                 if (work && (work->log_state == LOGON_NONE)) {
 158                         struct nmb_name nmbname;
 159                         make_nmb_name(&nmbname,lp_workgroup(),0x1c);
 160
 161                         if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL) {
 162                                 if( DEBUGLVL( 0 ) ) {
 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 }