source/nmbd/nmbd_mynames.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 char **my_netbios_names;
  28 extern fstring global_myworkgroup;
  29
  30 extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
  31
  32 /****************************************************************************
  33  Fail funtion when registering my netbios names.
  34   **************************************************************************/
  35
  36 static void my_name_register_failed(struct subnet_record *subrec,
  37                               struct response_record *rrec, struct nmb_name *nmbname)
  38 {
  39   DEBUG(0,("my_name_register_failed: Failed to register my name %s on subnet %s.\n",
  40             nmb_namestr(nmbname), subrec->subnet_name));
  41 }
  42
  43
  44 /****************************************************************************
  45   Add my workgroup and my given names to one subnet
  46   Also add the magic Samba names.
  47   **************************************************************************/
  48 void register_my_workgroup_one_subnet(struct subnet_record *subrec)
  49 {
  50         int i;
  51
  52         struct work_record *work;
  53
  54         /* Create the workgroup on the subnet. */
  55         if((work = create_workgroup_on_subnet(subrec, global_myworkgroup,
  56                                               PERMANENT_TTL)) == NULL) {
  57                 DEBUG(0,("register_my_workgroup_and_names: Failed to create my workgroup %s on subnet %s. \
  58 Exiting.\n", global_myworkgroup, subrec->subnet_name));
  59                 return;
  60         }
  61
  62         /* Each subnet entry, except for the wins_server_subnet has
  63            the magic Samba names. */
  64         add_samba_names_to_subnet(subrec);
  65
  66         /* Register all our names including aliases. */
  67         for (i=0; my_netbios_names[i]; i++) {
  68                 register_name(subrec, my_netbios_names[i],0x20,samba_nb_type,
  69                               NULL,
  70                               my_name_register_failed, NULL);
  71                 register_name(subrec, my_netbios_names[i],0x03,samba_nb_type,
  72                               NULL,
  73                               my_name_register_failed, NULL);
  74                 register_name(subrec, my_netbios_names[i],0x00,samba_nb_type,
  75                               NULL,
  76                               my_name_register_failed, NULL);
  77         }
  78
  79         /* Initiate election processing, register the workgroup names etc. */
  80         initiate_myworkgroup_startup(subrec, work);
  81 }
  82
  83
  84 /****************************************************************************
  85   Add my workgroup and my given names to the subnet lists.
  86   Also add the magic Samba names.
  87   **************************************************************************/
  88
  89 BOOL register_my_workgroup_and_names(void)
  90 {
  91   struct subnet_record *subrec;
  92   int i;
  93
  94   for(subrec = FIRST_SUBNET;
  95       subrec;
  96       subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
  97   {
  98           register_my_workgroup_one_subnet(subrec);
  99   }
 100
 101   /* If we are not a WINS client, we still need to add the magic Samba
 102      names and the netbios names to the unicast subnet directly. This is
 103      to allow unicast node status requests and queries to still work
 104      in a broadcast only environment. */
 105
 106   if(we_are_a_wins_client() == False)
 107   {
 108     add_samba_names_to_subnet(unicast_subnet);
 109
 110     for (i=0; my_netbios_names[i]; i++)
 111     {
 112       for(subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
 113       {
 114         /*
 115          * Ensure all the IP addresses are added if we are multihomed.
 116          */
 117         struct nmb_name nmbname;
 118
 119         make_nmb_name(&nmbname, my_netbios_names[i],0x20);
 120         insert_permanent_name_into_unicast(subrec, &nmbname, samba_nb_type);
 121
 122         make_nmb_name(&nmbname, my_netbios_names[i],0x3);
 123         insert_permanent_name_into_unicast(subrec, &nmbname, samba_nb_type);
 124
 125         make_nmb_name(&nmbname, my_netbios_names[i],0x0);
 126         insert_permanent_name_into_unicast(subrec, &nmbname, samba_nb_type);
 127       }
 128     }
 129
 130     /*
 131      * Add the WORKGROUP<0> and WORKGROUP<1e> group names to the unicast subnet
 132      * also for the same reasons.
 133      */
 134
 135     for(subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
 136     {
 137       /*
 138        * Ensure all the IP addresses are added if we are multihomed.
 139        */
 140       struct nmb_name nmbname;
 141
 142       make_nmb_name(&nmbname, global_myworkgroup, 0x0);
 143       insert_permanent_name_into_unicast(subrec, &nmbname, samba_nb_type|NB_GROUP);
 144
 145       make_nmb_name(&nmbname, global_myworkgroup, 0x1e);
 146       insert_permanent_name_into_unicast(subrec, &nmbname, samba_nb_type|NB_GROUP);
 147     }
 148   }
 149
 150   /*
 151    * We need to add the Samba names to the remote broadcast subnet,
 152    * as NT 4.x does directed broadcast requests to the *<0x0> name.
 153    */
 154   add_samba_names_to_subnet(remote_broadcast_subnet);
 155
 156   return True;
 157 }
 158
 159 /****************************************************************************
 160   Remove all the names we registered.
 161 **************************************************************************/
 162
 163 void release_my_names(void)
 164 {
 165 #if 0 /*JRR: do WINS server only, otherwise clients ignore us when we come back up*/
 166   struct subnet_record *subrec;
 167
 168   for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
 169 #else
 170   struct subnet_record *subrec = unicast_subnet;
 171 #endif
 172   {
 173     struct name_record *namerec, *nextnamerec;
 174
 175     for (namerec = (struct name_record *)ubi_trFirst( subrec->namelist );
 176          namerec;
 177          namerec = nextnamerec)
 178     {
 179       nextnamerec = (struct name_record *)ubi_trNext( namerec );
 180       if( (namerec->data.source == SELF_NAME)
 181        && !NAME_IS_DEREGISTERING(namerec) )
 182         release_name( subrec, namerec, standard_success_release,
 183                       NULL, NULL);
 184     }
 185   }
 186 }
 187
 188 /*******************************************************************
 189   Refresh our registered names.
 190   ******************************************************************/
 191
 192 void refresh_my_names(time_t t)
 193 {
 194   struct subnet_record *subrec;
 195
 196   for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
 197   {
 198     struct name_record *namerec;
 199
 200     /* B nodes don't send out name refresh requests, see RFC 1001, 15.5.1 */
 201     if (subrec != unicast_subnet)
 202       continue;
 203
 204     for( namerec = (struct name_record *)ubi_trFirst( subrec->namelist );
 205          namerec;
 206          namerec = (struct name_record *)ubi_trNext( namerec ) )
 207     {
 208       /* Each SELF name has an individual time to be refreshed. */
 209       if( (namerec->data.source == SELF_NAME)
 210        && (namerec->data.refresh_time < t)
 211        && ( namerec->data.death_time != PERMANENT_TTL) )
 212       {
 213         /* We cheat here and pretend the refresh is going to be
 214            successful & update the refresh times. This stops
 215            multiple refresh calls being done. We actually
 216            deal with refresh failure in the fail_fn.
 217          */
 218         if( !is_refresh_already_queued( subrec, namerec) )
 219           refresh_name( subrec, namerec, NULL, NULL, NULL );
 220         namerec->data.death_time = t + lp_max_ttl();
 221         namerec->data.refresh_time = t + MIN(lp_max_ttl(), MAX_REFRESH_TIME);
 222       }
 223     }
 224   }
 225 }