source/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
  25 extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
  26
  27 /****************************************************************************
  28   Fail to become a Logon server on a subnet.
  29 ****************************************************************************/
  30
  31 static void become_logon_server_fail(struct subnet_record *subrec,
  32                                       struct response_record *rrec,
  33                                       struct nmb_name *fail_name)
  34 {
  35         unstring failname;
  36         struct work_record *work;
  37         struct server_record *servrec;
  38
  39         pull_ascii_nstring(failname, sizeof(failname), fail_name->name);
  40         work = find_workgroup_on_subnet(subrec, failname);
  41         if(!work) {
  42                 DEBUG(0,("become_logon_server_fail: Error - cannot find \
  43 workgroup %s on subnet %s\n", failname, subrec->subnet_name));
  44                 return;
  45         }
  46
  47         if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) {
  48                 DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
  49 in workgroup %s on subnet %s\n",
  50                         global_myname(), failname, subrec->subnet_name));
  51                 work->log_state = LOGON_NONE;
  52                 return;
  53         }
  54
  55         /* Set the state back to LOGON_NONE. */
  56         work->log_state = LOGON_NONE;
  57
  58         servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
  59
  60         DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
  61 workgroup %s on subnet %s. Couldn't register name %s.\n",
  62                 work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
  63
  64 }
  65
  66 /****************************************************************************
  67   Become a Logon server on a subnet.
  68   ****************************************************************************/
  69
  70 static void become_logon_server_success(struct subnet_record *subrec,
  71                                         struct userdata_struct *userdata,
  72                                         struct nmb_name *registered_name,
  73                                         uint16 nb_flags,
  74                                         int ttl, struct in_addr registered_ip)
  75 {
  76         unstring reg_name;
  77         struct work_record *work;
  78         struct server_record *servrec;
  79
  80         pull_ascii_nstring(reg_name, sizeof(reg_name), registered_name->name);
  81         work = find_workgroup_on_subnet( subrec, reg_name);
  82         if(!work) {
  83                 DEBUG(0,("become_logon_server_success: Error - cannot find \
  84 workgroup %s on subnet %s\n", reg_name, subrec->subnet_name));
  85                 return;
  86         }
  87
  88         if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) {
  89                 DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
  90 in workgroup %s on subnet %s\n",
  91                         global_myname(), reg_name, subrec->subnet_name));
  92                 work->log_state = LOGON_NONE;
  93                 return;
  94         }
  95
  96         /* Set the state in the workgroup structure. */
  97         work->log_state = LOGON_SRV; /* Become domain master. */
  98
  99         /* Update our server status. */
 100         servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
 101         /* To allow Win95 policies to load we need to set type domain
 102                 controller.
 103         */
 104         servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
 105
 106         /* Tell the namelist writer to write out a change. */
 107         subrec->work_changed = True;
 108
 109         /*
 110          * Add the WORKGROUP<1C> name to the UNICAST subnet with the IP address
 111          * for this subnet so we will respond to queries on this name.
 112          */
 113
 114         {
 115                 struct nmb_name nmbname;
 116                 make_nmb_name(&nmbname,lp_workgroup(),0x1c);
 117                 insert_permanent_name_into_unicast(subrec, &nmbname, 0x1c);
 118         }
 119
 120         DEBUG(0,("become_logon_server_success: Samba is now a logon server \
 121 for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
 122 }
 123
 124 /*******************************************************************
 125   Become a logon server by attempting to register the WORKGROUP<1c>
 126   group name.
 127 ******************************************************************/
 128
 129 static void become_logon_server(struct subnet_record *subrec,
 130                                 struct work_record *work)
 131 {
 132         DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
 133 on subnet %s\n", work->work_group,subrec->subnet_name));
 134
 135         DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
 136                 work->work_group));
 137         work->log_state = LOGON_WAIT;
 138
 139         register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
 140                         become_logon_server_success,
 141                         become_logon_server_fail, NULL);
 142 }
 143
 144 /*****************************************************************************
 145   Add the internet group <1c> logon names by unicast and broadcast.
 146   ****************************************************************************/
 147
 148 void add_logon_names(void)
 149 {
 150         struct subnet_record *subrec;
 151
 152         for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
 153                 struct work_record *work = find_workgroup_on_subnet(subrec, lp_workgroup());
 154
 155                 if (work && (work->log_state == LOGON_NONE)) {
 156                         struct nmb_name nmbname;
 157                         make_nmb_name(&nmbname,lp_workgroup(),0x1c);
 158
 159                         if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL) {
 160                                 if( DEBUGLVL( 0 ) ) {
 161                                         dbgtext( "add_domain_logon_names:\n" );
 162                                         dbgtext( "Attempting to become logon server " );
 163                                         dbgtext( "for workgroup %s ", lp_workgroup() );
 164                                         dbgtext( "on subnet %s\n", subrec->subnet_name );
 165                                 }
 166                                 become_logon_server(subrec, work);
 167                         }
 168                 }
 169         }
 170 }