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_SERVER:
  77                         if (domain_logons) {
  78                                 DEBUG(0, ("Server's Role (logon server) conflicts with server-level security\n"));
  79                         }
  80                         /* this used to be considered ROLE_DOMAIN_MEMBER but that's just wrong */
  81                         role = ROLE_STANDALONE;
  82                         break;
  83                 case SEC_DOMAIN:
  84                         if (domain_logons) {
  85                                 DEBUG(1, ("Server's Role (logon server) NOT ADVISED with domain-level security\n"));
  86                                 role = ROLE_DOMAIN_BDC;
  87                                 break;
  88                         }
  89                         role = ROLE_DOMAIN_MEMBER;
  90                         break;
  91                 case SEC_ADS:
  92                         if (domain_logons) {
  93                                 role = ROLE_DOMAIN_CONTROLLER;
  94                                 break;
  95                         }
  96                         role = ROLE_DOMAIN_MEMBER;
  97                         break;
  98                 case SEC_AUTO:
  99                 case SEC_USER:
 100                         if (domain_logons) {
 101
 102                                 if (domain_master) {
 103                                         role = ROLE_DOMAIN_PDC;
 104                                 } else {
 105                                         role = ROLE_DOMAIN_BDC;
 106                                 }
 107                         }
 108                         break;
 109                 default:
 110                         DEBUG(0, ("Server's Role undefined due to unknown security mode\n"));
 111                         break;
 112         }
 113
 114         return role;
 115 }
 116
 117 /**
 118  * Set the server role based on security, domain logons and domain master
 119  */
 120 int lp_find_security(int server_role, int security)
 121 {
 122         if (security != SEC_AUTO) {
 123                 return security;
 124         }
 125
 126         switch (server_role) {
 127         case ROLE_AUTO:
 128         case ROLE_STANDALONE:
 129                 return SEC_USER;
 130         case ROLE_DOMAIN_MEMBER:
 131 #if (defined(HAVE_ADS) || _SAMBA_BUILD_ >= 4)
 132                 return SEC_ADS;
 133 #else
 134                 return SEC_DOMAIN;
 135 #endif
 136         case ROLE_DOMAIN_PDC:
 137         case ROLE_DOMAIN_BDC:
 138         default:
 139                 return SEC_USER;
 140         }
 141 }
 142
 143
 144 /**
 145  * Check if server role and security parameters are contradictory
 146  */
 147 bool lp_is_security_and_server_role_valid(int server_role, int security)
 148 {
 149         bool valid = false;
 150
 151         if (security == SEC_AUTO) {
 152                 return true;
 153         }
 154
 155         switch (server_role) {
 156         case ROLE_AUTO:
 157                 valid = true;
 158                 break;
 159         case ROLE_STANDALONE:
 160                 if (security == SEC_SERVER || security == SEC_USER) {
 161                         valid = true;
 162                 }
 163                 break;
 164
 165         case ROLE_DOMAIN_MEMBER:
 166                 if (security == SEC_ADS || security == SEC_DOMAIN) {
 167                         valid = true;
 168                 }
 169                 break;
 170
 171         case ROLE_DOMAIN_PDC:
 172         case ROLE_DOMAIN_BDC:
 173                 if (security == SEC_USER || security == SEC_ADS || security == SEC_DOMAIN) {
 174                         valid = true;
 175                 }
 176                 break;
 177
 178         default:
 179                 break;
 180         }
 181
 182         return valid;
 183 }