source/cldap_server/netlogon.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    CLDAP server - netlogon handling
   5
   6    Copyright (C) Andrew Tridgell        2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/ldap/ldap.h"
  25 #include "lib/events/events.h"
  26 #include "lib/socket/socket.h"
  27 #include "smbd/service_task.h"
  28 #include "cldap_server/cldap_server.h"
  29
  30 /*
  31   fill in the cldap netlogon union for a given version
  32 */
  33 static NTSTATUS cldapd_netlogon_fill(struct cldap_socket *cldap,
  34                                      TALLOC_CTX *mem_ctx,
  35                                      const char *domain,
  36                                      const char *user,
  37                                      const char *src_address,
  38                                      uint32_t version,
  39                                      union nbt_cldap_netlogon *netlogon)
  40 {
  41         struct ldb_context *samctx;
  42         const char *attrs[] = {"realm", "dnsDomain", "objectGUID", "name", NULL};
  43         struct ldb_message **res;
  44         int ret;
  45         const char **services = lp_server_services();
  46         uint32_t server_type;
  47         const char *pdc_name;
  48         struct GUID domain_uuid;
  49         const char *realm;
  50         const char *dns_domain;
  51         const char *pdc_dns_name;
  52         const char *flatname;
  53         const char *site_name;
  54         const char *site_name2;
  55         const char *pdc_ip;
  56
  57         samctx = samdb_connect(mem_ctx);
  58         if (samctx == NULL) {
  59                 DEBUG(2,("Unable to open sam in cldap netlogon reply\n"));
  60                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
  61         }
  62
  63         /* the domain has an optional trailing . */
  64         if (domain[strlen(domain)-1] == '.') {
  65                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  66         }
  67
  68         /* try and find the domain */
  69         ret = gendb_search(samctx, samctx, NULL, &res, attrs,
  70                            "(&(dnsDomain=%s)(objectClass=domainDNS))", domain);
  71         if (ret != 1) {
  72                 DEBUG(2,("Unable to find domain '%s' in sam\n", domain));
  73                 return NT_STATUS_NO_SUCH_DOMAIN;
  74         }
  75
  76         server_type      =
  77                 NBT_SERVER_PDC | NBT_SERVER_GC |
  78                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
  79                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
  80                 NBT_SERVER_GOOD_TIMESERV;
  81
  82         if (lp_parm_bool(-1, "gensec", "krb5", True)) {
  83                 server_type |= NBT_SERVER_KDC;
  84         }
  85         if (str_list_check(services, "ldap")) {
  86                 server_type |= NBT_SERVER_LDAP;
  87         }
  88
  89         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name());
  90         domain_uuid      = samdb_result_guid(res[0], "objectGUID");
  91         realm            = samdb_result_string(res[0], "realm", lp_realm());
  92         dns_domain       = samdb_result_string(res[0], "dnsDomain", lp_realm());
  93         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
  94                                            lp_netbios_name(), dns_domain);
  95         flatname         = samdb_result_string(res[0], "name", lp_workgroup());
  96         site_name        = "Default-First-Site-Name.bludom.tridgell.net";
  97         site_name2       = "";
  98         pdc_ip           = iface_best_ip(src_address);
  99
 100         ZERO_STRUCTP(netlogon);
 101
 102         switch (version & 0xF) {
 103         case 0:
 104         case 1:
 105                 netlogon->logon1.pdc_name    = pdc_name;
 106                 netlogon->logon1.unknown     = "";
 107                 netlogon->logon1.domain_name = flatname;
 108                 netlogon->logon1.nt_version  = 1;
 109                 netlogon->logon1.lmnt_token  = 0xFFFF;
 110                 netlogon->logon1.lm20_token  = 0xFFFF;
 111                 break;
 112         case 2:
 113         case 3:
 114                 netlogon->logon2.pdc_name     = pdc_name;
 115                 netlogon->logon2.unknown      = "";
 116                 netlogon->logon2.domain_name  = flatname;
 117                 netlogon->logon2.domain_uuid  = domain_uuid;
 118                 netlogon->logon2.forest       = realm;
 119                 netlogon->logon2.dns_domain   = dns_domain;
 120                 netlogon->logon2.pdc_dns_name = pdc_dns_name;
 121                 netlogon->logon2.pdc_ip       = pdc_ip;
 122                 netlogon->logon2.server_type  = server_type;
 123                 netlogon->logon2.nt_version   = 3;
 124                 netlogon->logon2.lmnt_token   = 0xFFFF;
 125                 netlogon->logon2.lm20_token   = 0xFFFF;
 126                 break;
 127         case 4:
 128         case 5:
 129         case 6:
 130         case 7:
 131                 netlogon->logon3.server_type  = server_type;
 132                 netlogon->logon3.domain_uuid  = domain_uuid;
 133                 netlogon->logon3.forest       = realm;
 134                 netlogon->logon3.dns_domain   = dns_domain;
 135                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 136                 netlogon->logon3.domain       = flatname;
 137                 netlogon->logon3.pdc_name     = pdc_name;
 138                 netlogon->logon3.user_name    = user;
 139                 netlogon->logon3.site_name    = site_name;
 140                 netlogon->logon3.site_name2   = site_name2;
 141                 netlogon->logon3.nt_version   = 3;
 142                 netlogon->logon3.lmnt_token   = 0xFFFF;
 143                 netlogon->logon3.lm20_token   = 0xFFFF;
 144                 break;
 145         default:
 146                 netlogon->logon4.server_type  = server_type;
 147                 netlogon->logon4.domain_uuid  = domain_uuid;
 148                 netlogon->logon4.forest       = realm;
 149                 netlogon->logon4.dns_domain   = dns_domain;
 150                 netlogon->logon4.pdc_dns_name = pdc_dns_name;
 151                 netlogon->logon4.domain       = flatname;
 152                 netlogon->logon4.pdc_name     = lp_netbios_name();
 153                 netlogon->logon4.user_name    = user;
 154                 netlogon->logon4.site_name    = site_name;
 155                 netlogon->logon4.site_name2   = site_name2;
 156                 netlogon->logon4.unknown      = 10;
 157                 netlogon->logon4.unknown2     = 2;
 158                 netlogon->logon4.pdc_ip       = pdc_ip;
 159                 netlogon->logon4.nt_version   = 5;
 160                 netlogon->logon4.lmnt_token   = 0xFFFF;
 161                 netlogon->logon4.lm20_token   = 0xFFFF;
 162                 break;
 163         }
 164
 165         return NT_STATUS_OK;
 166 }
 167
 168
 169 /*
 170   handle incoming cldap requests
 171 */
 172 void cldapd_netlogon_request(struct cldap_socket *cldap,
 173                              uint32_t message_id,
 174                              const char *filter,
 175                              const char *src_address, int src_port)
 176 {
 177         struct ldap_parse_tree *tree;
 178         int i;
 179         const char *domain = NULL;
 180         const char *host = NULL;
 181         const char *user = "";
 182         int version = -1;
 183         union nbt_cldap_netlogon netlogon;
 184         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 185
 186         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 187
 188         DEBUG(0,("cldap filter='%s'\n", filter));
 189
 190         tree = ldap_parse_filter_string(tmp_ctx, filter);
 191         if (tree == NULL) goto failed;
 192
 193         if (tree->operation != LDAP_OP_AND) goto failed;
 194
 195         /* extract the query elements */
 196         for (i=0;i<tree->u.list.num_elements;i++) {
 197                 struct ldap_parse_tree *t = tree->u.list.elements[i];
 198                 if (t->operation != LDAP_OP_SIMPLE) goto failed;
 199                 if (strcasecmp(t->u.simple.attr, "DnsDomain") == 0) {
 200                         domain = talloc_strndup(tmp_ctx,
 201                                                 t->u.simple.value.data,
 202                                                 t->u.simple.value.length);
 203                 }
 204                 if (strcasecmp(t->u.simple.attr, "Host") == 0) {
 205                         host = talloc_strndup(tmp_ctx,
 206                                               t->u.simple.value.data,
 207                                               t->u.simple.value.length);
 208                 }
 209                 if (strcasecmp(t->u.simple.attr, "User") == 0) {
 210                         user = talloc_strndup(tmp_ctx,
 211                                               t->u.simple.value.data,
 212                                               t->u.simple.value.length);
 213                 }
 214                 if (strcasecmp(t->u.simple.attr, "NtVer") == 0 &&
 215                     t->u.simple.value.length == 4) {
 216                         version = IVAL(t->u.simple.value.data, 0);
 217                 }
 218         }
 219
 220         if (domain == NULL || host == NULL || version == -1) {
 221                 goto failed;
 222         }
 223
 224         DEBUG(0,("cldap netlogon query domain=%s host=%s user=%s version=%d\n",
 225                  domain, host, user, version));
 226
 227         status = cldapd_netlogon_fill(cldap, tmp_ctx, domain, user, src_address,
 228                                       version, &netlogon);
 229         if (!NT_STATUS_IS_OK(status)) {
 230                 goto failed;
 231         }
 232
 233         status = cldap_netlogon_reply(cldap, message_id, src_address, src_port, version,
 234                                       &netlogon);
 235         if (!NT_STATUS_IS_OK(status)) {
 236                 goto failed;
 237         }
 238
 239         talloc_free(tmp_ctx);
 240         return;
 241
 242 failed:
 243         DEBUG(0,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 244                  domain, host, version, nt_errstr(status)));
 245         talloc_free(tmp_ctx);
 246         cldap_empty_reply(cldap, message_id, src_address, src_port);
 247 }