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   /* set up initial value for server announce type */
  93   work->ServerType  = lp_default_server_announce();
  94   work->ServerType |= lp_local_master() ? SV_TYPE_POTENTIAL_BROWSER : 0;
  95   work->ServerType |= lp_domain_controller() ?  SV_TYPE_DOMAIN_CTRL : 0;
  96
  97   work->RunningElection = False;
  98   work->ElectionCount = 0;
  99   work->announce_interval = 0;
 100   work->needelection = False;
 101   work->needannounce = True;
 102   work->mst_state = MST_POTENTIAL;
 103   work->dom_state = DOMAIN_NONE;
 104   work->log_state = LOGON_NONE;
 105
 106   /* make sure all token representations of workgroups are unique */
 107
 108   for (d = FIRST_SUBNET; d && t == -1; d = NEXT_SUBNET_INCLUDING_WINS(d))
 109     {
 110       struct work_record *w;
 111       for (w = d->workgrouplist; w && t == -1; w = w->next)
 112         {
 113           if (strequal(w->work_group, work->work_group)) t = w->token;
 114         }
 115     }
 116
 117   if (t == -1)
 118     {
 119       work->token = ++workgroup_count;
 120     }
 121   else
 122     {
 123       work->token = t;
 124     }
 125
 126
 127   /* WfWg  uses 01040b01 */
 128   /* Win95 uses 01041501 */
 129   /* NTAS  uses ???????? */
 130   work->ElectionCriterion  = (MAINTAIN_LIST)|(ELECTION_VERSION<<8);
 131   work->ElectionCriterion |= (lp_os_level() << 24);
 132   if (lp_domain_master()) {
 133     work->ElectionCriterion |= 0x80;
 134   }
 135
 136   return work;
 137 }
 138
 139
 140 /*******************************************************************
 141   remove workgroups
 142   ******************************************************************/
 143 struct work_record *remove_workgroup(struct subnet_record *d,
 144                                      struct work_record *work,
 145                                          BOOL remove_all_servers)
 146 {
 147   struct work_record *ret_work = NULL;
 148
 149   if (!d || !work) return NULL;
 150
 151   DEBUG(3,("Removing old workgroup %s\n", work->work_group));
 152
 153   ret_work = work->next;
 154
 155   remove_old_servers(work, -1, remove_all_servers);
 156
 157   if (!work->serverlist)
 158   {
 159     if (work->prev) work->prev->next = work->next;
 160     if (work->next) work->next->prev = work->prev;
 161
 162     if (d->workgrouplist == work) d->workgrouplist = work->next;
 163
 164     free(work);
 165   }
 166
 167   return ret_work;
 168 }
 169
 170
 171 /****************************************************************************
 172   find a workgroup in the workgrouplist
 173   only create it if the domain allows it, or the parameter 'add' insists
 174   that it get created/added anyway. this allows us to force entries in
 175   lmhosts file to be added.
 176   **************************************************************************/
 177 struct work_record *find_workgroupstruct(struct subnet_record *d,
 178                                          fstring name, BOOL add)
 179 {
 180   struct work_record *ret, *work;
 181
 182   if (!d) return NULL;
 183
 184   DEBUG(4, ("workgroup search for %s: ", name));
 185
 186   for (ret = d->workgrouplist; ret; ret = ret->next) {
 187     if (!strcmp(ret->work_group,name)) {
 188       DEBUG(4, ("found\n"));
 189       return(ret);
 190     }
 191   }
 192
 193   if (!add) {
 194     DEBUG(4, ("not found\n"));
 195     return NULL;
 196   }
 197
 198   DEBUG(4,("not found: creating\n"));
 199
 200   if ((work = make_workgroup(name)))
 201     {
 202       if (!ip_equal(d->bcast_ip, wins_ip) &&
 203           lp_preferred_master() && lp_local_master() &&
 204           strequal(myworkgroup, name))
 205         {
 206           DEBUG(3, ("preferred master startup for %s\n", work->work_group));
 207           work->needelection = True;
 208           work->ElectionCriterion |= (1<<3);
 209         }
 210       add_workgroup(work, d);
 211       return(work);
 212     }
 213   return NULL;
 214 }
 215
 216
 217 /****************************************************************************
 218   dump a copy of the workgroup/domain database
 219   **************************************************************************/
 220 void dump_workgroups(void)
 221 {
 222   struct subnet_record *d;
 223
 224   for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d))
 225     {
 226       if (d->workgrouplist)
 227         {
 228           struct work_record *work;
 229
 230           DEBUG(4,("dump domain bcast=%15s: ", inet_ntoa(d->bcast_ip)));
 231           DEBUG(4,(" netmask=%15s:\n", inet_ntoa(d->mask_ip)));
 232
 233           for (work = d->workgrouplist; work; work = work->next)
 234             {
 235               DEBUG(4,("\t%s(%d)\n", work->work_group, work->token));
 236               if (work->serverlist)
 237                 {
 238                   struct server_record *s;
 239                   for (s = work->serverlist; s; s = s->next)
 240                     {
 241                       DEBUG(4,("\t\t%s %8x (%s)\n",
 242                                s->serv.name, s->serv.type, s->serv.comment));
 243                     }
 244                 }
 245             }
 246         }
 247     }
 248 }