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