lib/param/loadparm_server_role.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Parameter loading functions
   4    Copyright (C) Karl Auer 1993-1998
   5
   6    Largely re-written by Andrew Tridgell, September 1994
   7
   8    Copyright (C) Simo Sorce 2001
   9    Copyright (C) Alexander Bokovoy 2002
  10    Copyright (C) Stefan (metze) Metzmacher 2002
  11    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
  12    Copyright (C) Michael Adam 2008
  13    Copyright (C) Andrew Bartlett 2010
  14
  15    This program is free software; you can redistribute it and/or modify
  16    it under the terms of the GNU General Public License as published by
  17    the Free Software Foundation; either version 3 of the License, or
  18    (at your option) any later version.
  19
  20    This program is distributed in the hope that it will be useful,
  21    but WITHOUT ANY WARRANTY; without even the implied warranty of
  22    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23    GNU General Public License for more details.
  24
  25    You should have received a copy of the GNU General Public License
  26    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  27 */
  28 #include "includes.h"
  29 #include "lib/param/loadparm.h"
  30 #include "libds/common/roles.h"
  31
  32 /*******************************************************************
  33  Set the server type we will announce as via nmbd.
  34 ********************************************************************/
  35
  36 static const struct srv_role_tab {
  37         uint32_t role;
  38         const char *role_str;
  39 } srv_role_tab [] = {
  40         { ROLE_STANDALONE, "ROLE_STANDALONE" },
  41         { ROLE_DOMAIN_MEMBER, "ROLE_DOMAIN_MEMBER" },
  42         { ROLE_DOMAIN_BDC, "ROLE_DOMAIN_BDC" },
  43         { ROLE_DOMAIN_PDC, "ROLE_DOMAIN_PDC" },
  44         { 0, NULL }
  45 };
  46
  47 const char* server_role_str(uint32_t role)
  48 {
  49         int i = 0;
  50         for (i=0; srv_role_tab[i].role_str; i++) {
  51                 if (role == srv_role_tab[i].role) {
  52                         return srv_role_tab[i].role_str;
  53                 }
  54         }
  55         return NULL;
  56 }
  57
  58 /**
  59  * Set the server role based on security, domain logons and domain master
  60  */
  61 int lp_find_server_role(int server_role, int security, int domain_logons, int domain_master)
  62 {
  63         int role;
  64
  65         if (server_role != ROLE_AUTO) {
  66                 if (lp_is_security_and_server_role_valid(server_role, security)) {
  67                         return server_role;
  68                 }
  69         }
  70
  71         /* If server_role is set to ROLE_AUTO, or conflicted with the
  72          * chosen security setting, figure out the correct role */
  73         role = ROLE_STANDALONE;
  74
  75         switch (security) {
  76                 case SEC_SHARE:
  77                         if (domain_logons) {
  78                                 DEBUG(0, ("Server's Role (logon server) conflicts with share-level security\n"));
  79                         }
  80                         break;
  81                 case SEC_SERVER:
  82                         if (domain_logons) {
  83                                 DEBUG(0, ("Server's Role (logon server) conflicts with server-level security\n"));
  84                         }
  85                         /* this used to be considered ROLE_DOMAIN_MEMBER but that's just wrong */
  86                         role = ROLE_STANDALONE;
  87                         break;
  88                 case SEC_DOMAIN:
  89                         if (domain_logons) {
  90                                 DEBUG(1, ("Server's Role (logon server) NOT ADVISED with domain-level security\n"));
  91                                 role = ROLE_DOMAIN_BDC;
  92                                 break;
  93                         }
  94                         role = ROLE_DOMAIN_MEMBER;
  95                         break;
  96                 case SEC_ADS:
  97                         if (domain_logons) {
  98                                 role = ROLE_DOMAIN_CONTROLLER;
  99                                 break;
 100                         }
 101                         role = ROLE_DOMAIN_MEMBER;
 102                         break;
 103                 case SEC_AUTO:
 104                 case SEC_USER:
 105                         if (domain_logons) {
 106
 107                                 if (domain_master) {
 108                                         role = ROLE_DOMAIN_PDC;
 109                                 } else {
 110                                         role = ROLE_DOMAIN_BDC;
 111                                 }
 112                         }
 113                         break;
 114                 default:
 115                         DEBUG(0, ("Server's Role undefined due to unknown security mode\n"));
 116                         break;
 117         }
 118
 119         return role;
 120 }
 121
 122 /**
 123  * Set the server role based on security, domain logons and domain master
 124  */
 125 int lp_find_security(int server_role, int security)
 126 {
 127         if (security != SEC_AUTO) {
 128                 return security;
 129         }
 130
 131         switch (server_role) {
 132         case ROLE_AUTO:
 133         case ROLE_STANDALONE:
 134                 return SEC_USER;
 135         case ROLE_DOMAIN_MEMBER:
 136 #if (defined(HAVE_ADS) || _SAMBA_BUILD_ >= 4)
 137                 return SEC_ADS;
 138 #else
 139                 return SEC_DOMAIN;
 140 #endif
 141         case ROLE_DOMAIN_PDC:
 142         case ROLE_DOMAIN_BDC:
 143         default:
 144                 return SEC_USER;
 145         }
 146 }
 147
 148
 149 /**
 150  * Check if server role and security parameters are contradictory
 151  */
 152 bool lp_is_security_and_server_role_valid(int server_role, int security)
 153 {
 154         bool valid = false;
 155
 156         if (security == SEC_AUTO) {
 157                 return true;
 158         }
 159
 160         switch (server_role) {
 161         case ROLE_AUTO:
 162                 valid = true;
 163                 break;
 164         case ROLE_STANDALONE:
 165                 if (security == SEC_SHARE || security == SEC_SERVER || security == SEC_USER) {
 166                         valid = true;
 167                 }
 168                 break;
 169
 170         case ROLE_DOMAIN_MEMBER:
 171                 if (security == SEC_ADS || security == SEC_DOMAIN) {
 172                         valid = true;
 173                 }
 174                 break;
 175
 176         case ROLE_DOMAIN_PDC:
 177         case ROLE_DOMAIN_BDC:
 178                 if (security == SEC_USER || security == SEC_ADS || security == SEC_DOMAIN) {
 179                         valid = true;
 180                 }
 181                 break;
 182
 183         default:
 184                 break;
 185         }
 186
 187         return valid;
 188 }