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 1994-1996
   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 int workgroup_count = 0; /* unique index key: one for each workgroup */
  42
  43 /* what server type are we currently */
  44
  45 #define DFLT_SERVER_TYPE (SV_TYPE_WORKSTATION | SV_TYPE_SERVER | \
  46                         SV_TYPE_TIME_SOURCE | SV_TYPE_SERVER_UNIX | \
  47                         SV_TYPE_PRINTQ_SERVER | SV_TYPE_POTENTIAL_BROWSER)
  48
  49
  50 /****************************************************************************
  51   add a workgroup into the domain list
  52   **************************************************************************/
  53 static void add_workgroup(struct work_record *work, struct subnet_record *d)
  54 {
  55   struct work_record *w2;
  56
  57   if (!work || !d) return;
  58
  59   if (!d->workgrouplist)
  60     {
  61       d->workgrouplist = work;
  62       work->prev = NULL;
  63       work->next = NULL;
  64       return;
  65     }
  66
  67   for (w2 = d->workgrouplist; w2->next; w2 = w2->next);
  68
  69   w2->next = work;
  70   work->next = NULL;
  71   work->prev = w2;
  72 }
  73
  74
  75 /****************************************************************************
  76   create a blank workgroup
  77   **************************************************************************/
  78 static struct work_record *make_workgroup(char *name)
  79 {
  80   struct work_record *work;
  81   struct subnet_record *d;
  82   int t = -1;
  83
  84   if (!name || !name[0]) return NULL;
  85
  86   work = (struct work_record *)malloc(sizeof(*work));
  87   if (!work) return(NULL);
  88
  89   StrnCpy(work->work_group,name,sizeof(work->work_group)-1);
  90   work->serverlist = NULL;
  91
  92   work->ServerType = DFLT_SERVER_TYPE;
  93   work->RunningElection = False;
  94   work->ElectionCount = 0;
  95   work->needelection = False;
  96   work->needannounce = True;
  97   work->state = MST_NONE;
  98
  99   /* make sure all token representations of workgroups are unique */
 100
 101   for (d = subnetlist; d && t == -1; d = d->next)
 102     {
 103       struct work_record *w;
 104       for (w = d->workgrouplist; w && t == -1; w = w->next)
 105         {
 106           if (strequal(w->work_group, work->work_group)) t = w->token;
 107         }
 108     }
 109
 110   if (t == -1)
 111     {
 112       work->token = ++workgroup_count;
 113     }
 114   else
 115     {
 116       work->token = t;
 117     }
 118
 119
 120   /* WfWg  uses 01040b01 */
 121   /* Win95 uses 01041501 */
 122   /* NTAS  uses ???????? */
 123   work->ElectionCriterion  = (MAINTAIN_LIST<<1)|(ELECTION_VERSION<<8);
 124   work->ElectionCriterion |= (lp_os_level() << 24);
 125   if (lp_domain_master()) {
 126     work->ElectionCriterion |= 0x80;
 127   }
 128
 129   return work;
 130 }
 131
 132
 133 /*******************************************************************
 134   remove workgroups
 135   ******************************************************************/
 136 struct work_record *remove_workgroup(struct subnet_record *d,
 137                                      struct work_record *work,
 138                                          BOOL remove_all_servers)
 139 {
 140   struct work_record *ret_work = NULL;
 141
 142   if (!d || !work) return NULL;
 143
 144   DEBUG(3,("Removing old workgroup %s\n", work->work_group));
 145
 146   ret_work = work->next;
 147
 148   remove_old_servers(work, -1, remove_all_servers);
 149
 150   if (!work->serverlist)
 151   {
 152     if (work->prev) work->prev->next = work->next;
 153     if (work->next) work->next->prev = work->prev;
 154
 155     if (d->workgrouplist == work) d->workgrouplist = work->next;
 156
 157     free(work);
 158   }
 159
 160   return ret_work;
 161 }
 162
 163
 164 /****************************************************************************
 165   find a workgroup in the workgrouplist
 166   only create it if the domain allows it, or the parameter 'add' insists
 167   that it get created/added anyway. this allows us to force entries in
 168   lmhosts file to be added.
 169   **************************************************************************/
 170 struct work_record *find_workgroupstruct(struct subnet_record *d,
 171                                          fstring name, BOOL add)
 172 {
 173   struct work_record *ret, *work;
 174
 175   if (!d) return NULL;
 176
 177   DEBUG(4, ("workgroup search for %s: ", name));
 178
 179   if (strequal(name, "*"))
 180     {
 181       DEBUG(2,("add any workgroups: initiating browser search on %s\n",
 182                inet_ntoa(d->bcast_ip)));
 183       queue_netbios_pkt_wins(d,ClientNMB,NMB_QUERY, NAME_QUERY_FIND_MST,
 184                              MSBROWSE,0x1,0,0,0,NULL,NULL,
 185                              True,False, d->bcast_ip, d->bcast_ip);
 186       return NULL;
 187     }
 188
 189   for (ret = d->workgrouplist; ret; ret = ret->next) {
 190     if (!strcmp(ret->work_group,name)) {
 191       DEBUG(4, ("found\n"));
 192       return(ret);
 193     }
 194   }
 195
 196   if (!add) {
 197     DEBUG(4, ("not found\n"));
 198     return NULL;
 199   }
 200
 201   DEBUG(4,("not found: creating\n"));
 202
 203   if ((work = make_workgroup(name)))
 204     {
 205       if (lp_preferred_master() &&
 206           strequal(lp_workgroup(), name))
 207         {
 208           DEBUG(3, ("preferred master startup for %s\n", work->work_group));
 209           work->needelection = True;
 210           work->ElectionCriterion |= (1<<3);
 211         }
 212       add_workgroup(work, d);
 213       return(work);
 214     }
 215   return NULL;
 216 }
 217
 218
 219 /****************************************************************************
 220   dump a copy of the workgroup/domain database
 221   **************************************************************************/
 222 void dump_workgroups(void)
 223 {
 224   struct subnet_record *d;
 225
 226   for (d = subnetlist; d; d = d->next)
 227     {
 228       if (d->workgrouplist)
 229         {
 230           struct work_record *work;
 231
 232           DEBUG(4,("dump domain bcast=%15s: ", inet_ntoa(d->bcast_ip)));
 233           DEBUG(4,(" netmask=%15s:\n", inet_ntoa(d->mask_ip)));
 234
 235           for (work = d->workgrouplist; work; work = work->next)
 236             {
 237               DEBUG(4,("\t%s(%d)\n", work->work_group, work->token));
 238               if (work->serverlist)
 239                 {
 240                   struct server_record *s;
 241                   for (s = work->serverlist; s; s = s->next)
 242                     {
 243                       DEBUG(4,("\t\t%s %8x (%s)\n",
 244                                s->serv.name, s->serv.type, s->serv.comment));
 245                     }
 246                 }
 247             }
 248         }
 249     }
 250 }