source/namedbwork.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    NBT netbios routines and daemon - version 2
   5    Copyright (C) Andrew Tridgell 1994-1997
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21    Revision History:
  22
  23    14 jan 96: lkcl@pires.co.uk
  24    added multiple workgroup domain master support
  25
  26    04 jul 96: lkcl@pires.co.uk
  27    created module namedbwork containing workgroup database functions
  28
  29 */
  30
  31 #include "includes.h"
  32 #include "smb.h"
  33
  34 extern int ClientNMB;
  35
  36 extern int DEBUGLEVEL;
  37
  38 /* this is our domain/workgroup/server database */
  39 extern struct subnet_record *subnetlist;
  40
  41 extern struct in_addr wins_ip;
  42
  43 extern fstring myworkgroup;
  44
  45 int workgroup_count = 0; /* unique index key: one for each workgroup */
  46
  47
  48
  49 /****************************************************************************
  50   add a workgroup into the domain list
  51   **************************************************************************/
  52 static void add_workgroup(struct work_record *work, struct subnet_record *d)
  53 {
  54   struct work_record *w2;
  55
  56   if (!work || !d) return;
  57
  58   if (!d->workgrouplist)
  59     {
  60       d->workgrouplist = work;
  61       work->prev = NULL;
  62       work->next = NULL;
  63       return;
  64     }
  65
  66   for (w2 = d->workgrouplist; w2->next; w2 = w2->next);
  67
  68   w2->next = work;
  69   work->next = NULL;
  70   work->prev = w2;
  71 }
  72
  73
  74 /****************************************************************************
  75   create a blank workgroup
  76   **************************************************************************/
  77 static struct work_record *make_workgroup(char *name)
  78 {
  79   struct work_record *work;
  80   struct subnet_record *d;
  81   int t = -1;
  82
  83   if (!name || !name[0]) return NULL;
  84
  85   work = (struct work_record *)malloc(sizeof(*work));
  86   if (!work) return(NULL);
  87   bzero((char *)work, sizeof(*work));
  88
  89   StrnCpy(work->work_group,name,sizeof(work->work_group)-1);
  90   work->serverlist = NULL;
  91
  92   work->ServerType = lp_default_server_announce() | (lp_local_master() ?
  93                           SV_TYPE_POTENTIAL_BROWSER : 0 );
  94   work->RunningElection = False;
  95   work->ElectionCount = 0;
  96   work->announce_interval = 0;
  97   work->needelection = False;
  98   work->needannounce = True;
  99   work->mst_state = MST_POTENTIAL;
 100   work->dom_state = DOMAIN_NONE;
 101   work->log_state = LOGON_NONE;
 102
 103   /* make sure all token representations of workgroups are unique */
 104
 105   for (d = FIRST_SUBNET; d && t == -1; d = NEXT_SUBNET_INCLUDING_WINS(d))
 106     {
 107       struct work_record *w;
 108       for (w = d->workgrouplist; w && t == -1; w = w->next)
 109         {
 110           if (strequal(w->work_group, work->work_group)) t = w->token;
 111         }
 112     }
 113
 114   if (t == -1)
 115     {
 116       work->token = ++workgroup_count;
 117     }
 118   else
 119     {
 120       work->token = t;
 121     }
 122
 123
 124   /* WfWg  uses 01040b01 */
 125   /* Win95 uses 01041501 */
 126   /* NTAS  uses ???????? */
 127   work->ElectionCriterion  = (MAINTAIN_LIST)|(ELECTION_VERSION<<8);
 128   work->ElectionCriterion |= (lp_os_level() << 24);
 129   if (lp_domain_master()) {
 130     work->ElectionCriterion |= 0x80;
 131   }
 132
 133   return work;
 134 }
 135
 136
 137 /*******************************************************************
 138   remove workgroups
 139   ******************************************************************/
 140 struct work_record *remove_workgroup(struct subnet_record *d,
 141                                      struct work_record *work,
 142                                          BOOL remove_all_servers)
 143 {
 144   struct work_record *ret_work = NULL;
 145
 146   if (!d || !work) return NULL;
 147
 148   DEBUG(3,("Removing old workgroup %s\n", work->work_group));
 149
 150   ret_work = work->next;
 151
 152   remove_old_servers(work, -1, remove_all_servers);
 153
 154   if (!work->serverlist)
 155   {
 156     if (work->prev) work->prev->next = work->next;
 157     if (work->next) work->next->prev = work->prev;
 158
 159     if (d->workgrouplist == work) d->workgrouplist = work->next;
 160
 161     free(work);
 162   }
 163
 164   return ret_work;
 165 }
 166
 167
 168 /****************************************************************************
 169   find a workgroup in the workgrouplist
 170   only create it if the domain allows it, or the parameter 'add' insists
 171   that it get created/added anyway. this allows us to force entries in
 172   lmhosts file to be added.
 173   **************************************************************************/
 174 struct work_record *find_workgroupstruct(struct subnet_record *d,
 175                                          fstring name, BOOL add)
 176 {
 177   struct work_record *ret, *work;
 178
 179   if (!d) return NULL;
 180
 181   DEBUG(4, ("workgroup search for %s: ", name));
 182
 183   for (ret = d->workgrouplist; ret; ret = ret->next) {
 184     if (!strcmp(ret->work_group,name)) {
 185       DEBUG(4, ("found\n"));
 186       return(ret);
 187     }
 188   }
 189
 190   if (!add) {
 191     DEBUG(4, ("not found\n"));
 192     return NULL;
 193   }
 194
 195   DEBUG(4,("not found: creating\n"));
 196
 197   if ((work = make_workgroup(name)))
 198     {
 199       if (!ip_equal(d->bcast_ip, wins_ip) &&
 200           lp_preferred_master() && lp_local_master() &&
 201           strequal(myworkgroup, name))
 202         {
 203           DEBUG(3, ("preferred master startup for %s\n", work->work_group));
 204           work->needelection = True;
 205           work->ElectionCriterion |= (1<<3);
 206         }
 207       add_workgroup(work, d);
 208       return(work);
 209     }
 210   return NULL;
 211 }
 212
 213
 214 /****************************************************************************
 215   dump a copy of the workgroup/domain database
 216   **************************************************************************/
 217 void dump_workgroups(void)
 218 {
 219   struct subnet_record *d;
 220
 221   for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d))
 222     {
 223       if (d->workgrouplist)
 224         {
 225           struct work_record *work;
 226
 227           DEBUG(4,("dump domain bcast=%15s: ", inet_ntoa(d->bcast_ip)));
 228           DEBUG(4,(" netmask=%15s:\n", inet_ntoa(d->mask_ip)));
 229
 230           for (work = d->workgrouplist; work; work = work->next)
 231             {
 232               DEBUG(4,("\t%s(%d)\n", work->work_group, work->token));
 233               if (work->serverlist)
 234                 {
 235                   struct server_record *s;
 236                   for (s = work->serverlist; s; s = s->next)
 237                     {
 238                       DEBUG(4,("\t\t%s %8x (%s)\n",
 239                                s->serv.name, s->serv.type, s->serv.comment));
 240                     }
 241                 }
 242             }
 243         }
 244     }
 245 }