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
  88   StrnCpy(work->work_group,name,sizeof(work->work_group)-1);
  89   work->serverlist = NULL;
  90
  91   work->ServerType = DFLT_SERVER_TYPE | (lp_local_master() ?
  92                           SV_TYPE_POTENTIAL_BROWSER : 0 );
  93   work->RunningElection = False;
  94   work->ElectionCount = 0;
  95   work->needelection = False;
  96   work->needannounce = True;
  97   work->mst_state = MST_POTENTIAL;
  98   work->dom_state = DOMAIN_NONE;
  99   work->log_state = LOGON_NONE;
 100
 101   /* make sure all token representations of workgroups are unique */
 102
 103   for (d = FIRST_SUBNET; d && t == -1; d = NEXT_SUBNET_INCLUDING_WINS(d))
 104     {
 105       struct work_record *w;
 106       for (w = d->workgrouplist; w && t == -1; w = w->next)
 107         {
 108           if (strequal(w->work_group, work->work_group)) t = w->token;
 109         }
 110     }
 111
 112   if (t == -1)
 113     {
 114       work->token = ++workgroup_count;
 115     }
 116   else
 117     {
 118       work->token = t;
 119     }
 120
 121
 122   /* WfWg  uses 01040b01 */
 123   /* Win95 uses 01041501 */
 124   /* NTAS  uses ???????? */
 125   work->ElectionCriterion  = (MAINTAIN_LIST<<1)|(ELECTION_VERSION<<8);
 126   work->ElectionCriterion |= (lp_os_level() << 24);
 127   if (lp_domain_master()) {
 128     work->ElectionCriterion |= 0x80;
 129   }
 130
 131   return work;
 132 }
 133
 134
 135 /*******************************************************************
 136   remove workgroups
 137   ******************************************************************/
 138 struct work_record *remove_workgroup(struct subnet_record *d,
 139                                      struct work_record *work,
 140                                          BOOL remove_all_servers)
 141 {
 142   struct work_record *ret_work = NULL;
 143
 144   if (!d || !work) return NULL;
 145
 146   DEBUG(3,("Removing old workgroup %s\n", work->work_group));
 147
 148   ret_work = work->next;
 149
 150   remove_old_servers(work, -1, remove_all_servers);
 151
 152   if (!work->serverlist)
 153   {
 154     if (work->prev) work->prev->next = work->next;
 155     if (work->next) work->next->prev = work->prev;
 156
 157     if (d->workgrouplist == work) d->workgrouplist = work->next;
 158
 159     free(work);
 160   }
 161
 162   return ret_work;
 163 }
 164
 165
 166 /****************************************************************************
 167   find a workgroup in the workgrouplist
 168   only create it if the domain allows it, or the parameter 'add' insists
 169   that it get created/added anyway. this allows us to force entries in
 170   lmhosts file to be added.
 171   **************************************************************************/
 172 struct work_record *find_workgroupstruct(struct subnet_record *d,
 173                                          fstring name, BOOL add)
 174 {
 175   struct work_record *ret, *work;
 176
 177   if (!d) return NULL;
 178
 179   DEBUG(4, ("workgroup search for %s: ", name));
 180
 181   for (ret = d->workgrouplist; ret; ret = ret->next) {
 182     if (!strcmp(ret->work_group,name)) {
 183       DEBUG(4, ("found\n"));
 184       return(ret);
 185     }
 186   }
 187
 188   if (!add) {
 189     DEBUG(4, ("not found\n"));
 190     return NULL;
 191   }
 192
 193   DEBUG(4,("not found: creating\n"));
 194
 195   if ((work = make_workgroup(name)))
 196     {
 197       if (!ip_equal(d->bcast_ip, wins_ip) &&
 198           lp_preferred_master() && lp_local_master() &&
 199           strequal(myworkgroup, name))
 200         {
 201           DEBUG(3, ("preferred master startup for %s\n", work->work_group));
 202           work->needelection = True;
 203           work->ElectionCriterion |= (1<<3);
 204         }
 205       add_workgroup(work, d);
 206       return(work);
 207     }
 208   return NULL;
 209 }
 210
 211
 212 /****************************************************************************
 213   dump a copy of the workgroup/domain database
 214   **************************************************************************/
 215 void dump_workgroups(void)
 216 {
 217   struct subnet_record *d;
 218
 219   for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d))
 220     {
 221       if (d->workgrouplist)
 222         {
 223           struct work_record *work;
 224
 225           DEBUG(4,("dump domain bcast=%15s: ", inet_ntoa(d->bcast_ip)));
 226           DEBUG(4,(" netmask=%15s:\n", inet_ntoa(d->mask_ip)));
 227
 228           for (work = d->workgrouplist; work; work = work->next)
 229             {
 230               DEBUG(4,("\t%s(%d)\n", work->work_group, work->token));
 231               if (work->serverlist)
 232                 {
 233                   struct server_record *s;
 234                   for (s = work->serverlist; s; s = s->next)
 235                     {
 236                       DEBUG(4,("\t\t%s %8x (%s)\n",
 237                                s->serv.name, s->serv.type, s->serv.comment));
 238                     }
 239                 }
 240             }
 241         }
 242     }
 243 }