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