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_DOMAIN:
  77                         if (domain_logons) {
  78                                 DEBUG(1, ("Server's Role (logon server) NOT ADVISED with domain-level security\n"));
  79                                 role = ROLE_DOMAIN_BDC;
  80                                 break;
  81                         }
  82                         role = ROLE_DOMAIN_MEMBER;
  83                         break;
  84                 case SEC_ADS:
  85                         if (domain_logons) {
  86                                 role = ROLE_DOMAIN_CONTROLLER;
  87                                 break;
  88                         }
  89                         role = ROLE_DOMAIN_MEMBER;
  90                         break;
  91                 case SEC_AUTO:
  92                 case SEC_USER:
  93                         if (domain_logons) {
  94
  95                                 if (domain_master) {
  96                                         role = ROLE_DOMAIN_PDC;
  97                                 } else {
  98                                         role = ROLE_DOMAIN_BDC;
  99                                 }
 100                         }
 101                         break;
 102                 default:
 103                         DEBUG(0, ("Server's Role undefined due to unknown security mode\n"));
 104                         break;
 105         }
 106
 107         return role;
 108 }
 109
 110 /**
 111  * Set the server role based on security, domain logons and domain master
 112  */
 113 int lp_find_security(int server_role, int security)
 114 {
 115         if (security != SEC_AUTO) {
 116                 return security;
 117         }
 118
 119         switch (server_role) {
 120         case ROLE_AUTO:
 121         case ROLE_STANDALONE:
 122                 return SEC_USER;
 123         case ROLE_DOMAIN_MEMBER:
 124 #if (defined(HAVE_ADS) || _SAMBA_BUILD_ >= 4)
 125                 return SEC_ADS;
 126 #else
 127                 return SEC_DOMAIN;
 128 #endif
 129         case ROLE_DOMAIN_PDC:
 130         case ROLE_DOMAIN_BDC:
 131         default:
 132                 return SEC_USER;
 133         }
 134 }
 135
 136
 137 /**
 138  * Check if server role and security parameters are contradictory
 139  */
 140 bool lp_is_security_and_server_role_valid(int server_role, int security)
 141 {
 142         bool valid = false;
 143
 144         if (security == SEC_AUTO) {
 145                 return true;
 146         }
 147
 148         switch (server_role) {
 149         case ROLE_AUTO:
 150                 valid = true;
 151                 break;
 152         case ROLE_STANDALONE:
 153                 if (security == SEC_USER) {
 154                         valid = true;
 155                 }
 156                 break;
 157
 158         case ROLE_DOMAIN_MEMBER:
 159                 if (security == SEC_ADS || security == SEC_DOMAIN) {
 160                         valid = true;
 161                 }
 162                 break;
 163
 164         case ROLE_DOMAIN_PDC:
 165         case ROLE_DOMAIN_BDC:
 166                 if (security == SEC_USER || security == SEC_ADS || security == SEC_DOMAIN) {
 167                         valid = true;
 168                 }
 169                 break;
 170
 171         default:
 172                 break;
 173         }
 174
 175         return valid;
 176 }