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 extern struct in_addr ipgrp;
  42
  43 int workgroup_count = 0; /* unique index key: one for each workgroup */
  44
  45
  46
  47 /****************************************************************************
  48   add a workgroup into the domain list
  49   **************************************************************************/
  50 static void add_workgroup(struct work_record *work, struct subnet_record *d)
  51 {
  52   struct work_record *w2;
  53
  54   if (!work || !d) return;
  55
  56   if (!d->workgrouplist)
  57     {
  58       d->workgrouplist = work;
  59       work->prev = NULL;
  60       work->next = NULL;
  61       return;
  62     }
  63
  64   for (w2 = d->workgrouplist; w2->next; w2 = w2->next);
  65
  66   w2->next = work;
  67   work->next = NULL;
  68   work->prev = w2;
  69 }
  70
  71
  72 /****************************************************************************
  73   create a blank workgroup
  74   **************************************************************************/
  75 static struct work_record *make_workgroup(char *name)
  76 {
  77   struct work_record *work;
  78   struct subnet_record *d;
  79   int t = -1;
  80
  81   if (!name || !name[0]) return NULL;
  82
  83   work = (struct work_record *)malloc(sizeof(*work));
  84   if (!work) return(NULL);
  85
  86   StrnCpy(work->work_group,name,sizeof(work->work_group)-1);
  87   work->serverlist = NULL;
  88
  89   work->ServerType = DFLT_SERVER_TYPE | SV_TYPE_POTENTIAL_BROWSER;
  90   work->RunningElection = False;
  91   work->ElectionCount = 0;
  92   work->needelection = False;
  93   work->needannounce = True;
  94   work->state = MST_NONE;
  95
  96   /* make sure all token representations of workgroups are unique */
  97
  98   for (d = subnetlist; d && t == -1; d = d->next)
  99     {
 100       struct work_record *w;
 101       for (w = d->workgrouplist; w && t == -1; w = w->next)
 102         {
 103           if (strequal(w->work_group, work->work_group)) t = w->token;
 104         }
 105     }
 106
 107   if (t == -1)
 108     {
 109       work->token = ++workgroup_count;
 110     }
 111   else
 112     {
 113       work->token = t;
 114     }
 115
 116
 117   /* WfWg  uses 01040b01 */
 118   /* Win95 uses 01041501 */
 119   /* NTAS  uses ???????? */
 120   work->ElectionCriterion  = (MAINTAIN_LIST<<1)|(ELECTION_VERSION<<8);
 121   work->ElectionCriterion |= (lp_os_level() << 24);
 122   if (lp_domain_master()) {
 123     work->ElectionCriterion |= 0x80;
 124   }
 125
 126   return work;
 127 }
 128
 129
 130 /*******************************************************************
 131   remove workgroups
 132   ******************************************************************/
 133 struct work_record *remove_workgroup(struct subnet_record *d,
 134                                      struct work_record *work,
 135                                          BOOL remove_all_servers)
 136 {
 137   struct work_record *ret_work = NULL;
 138
 139   if (!d || !work) return NULL;
 140
 141   DEBUG(3,("Removing old workgroup %s\n", work->work_group));
 142
 143   ret_work = work->next;
 144
 145   remove_old_servers(work, -1, remove_all_servers);
 146
 147   if (!work->serverlist)
 148   {
 149     if (work->prev) work->prev->next = work->next;
 150     if (work->next) work->next->prev = work->prev;
 151
 152     if (d->workgrouplist == work) d->workgrouplist = work->next;
 153
 154     free(work);
 155   }
 156
 157   return ret_work;
 158 }
 159
 160
 161 /****************************************************************************
 162   find a workgroup in the workgrouplist
 163   only create it if the domain allows it, or the parameter 'add' insists
 164   that it get created/added anyway. this allows us to force entries in
 165   lmhosts file to be added.
 166   **************************************************************************/
 167 struct work_record *find_workgroupstruct(struct subnet_record *d,
 168                                          fstring name, BOOL add)
 169 {
 170   struct work_record *ret, *work;
 171
 172   if (!d) return NULL;
 173
 174   DEBUG(4, ("workgroup search for %s: ", name));
 175
 176   if (strequal(name, "*"))
 177     {
 178       DEBUG(2,("add any workgroups: initiating browser search on %s\n",
 179                inet_ntoa(d->bcast_ip)));
 180       queue_netbios_pkt_wins(d,ClientNMB,NMB_QUERY, NAME_QUERY_FIND_MST,
 181                              MSBROWSE,0x1,0,0,0,NULL,NULL,
 182                              True,False, d->bcast_ip, d->bcast_ip);
 183       return NULL;
 184     }
 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, ipgrp) &&
 203           lp_preferred_master() &&
 204           strequal(lp_workgroup(), 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 = subnetlist; d; d = d->next)
 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 }