source4/rpc_server/dnsserver/dnsutils.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    DNS Server
   5
   6    Copyright (C) Amitay Isaacs 2011
   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 3 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, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "dnsserver.h"
  24 #include "rpc_server/common/common.h"
  25 #include "dsdb/samdb/samdb.h"
  26 #include "lib/socket/netif.h"
  27
  28
  29 struct dnsserver_serverinfo *dnsserver_init_serverinfo(TALLOC_CTX *mem_ctx,
  30                                                         struct loadparm_context *lp_ctx,
  31                                                         struct ldb_context *samdb)
  32 {
  33         struct dnsserver_serverinfo *serverinfo;
  34         struct dcerpc_server_info *dinfo;
  35         struct ldb_dn *domain_dn, *forest_dn;
  36         struct interface *ifaces;
  37         int num_interfaces, i;
  38
  39         serverinfo = talloc_zero(mem_ctx, struct dnsserver_serverinfo);
  40         if (serverinfo == NULL) {
  41                 return NULL;
  42         }
  43
  44         dinfo = lpcfg_dcerpc_server_info(mem_ctx, lp_ctx);
  45         if (dinfo) {
  46                 serverinfo->dwVersion = (dinfo->version_build & 0x0000FFFF) << 16 |
  47                                 (dinfo->version_minor & 0x000000FF) << 8 |
  48                                 (dinfo->version_major & 0x000000FF);
  49                 talloc_free(dinfo);
  50         } else {
  51                 serverinfo->dwVersion = 0x0ECE0205; /* build, os_minor, os_major */;
  52         }
  53
  54         serverinfo->fBootMethod = DNS_BOOT_METHOD_DIRECTORY;
  55         serverinfo->fAdminConfigured = 0;
  56         serverinfo->fAllowUpdate = 1;
  57         serverinfo->fDsAvailable = 1;
  58
  59         serverinfo->pszServerName = talloc_asprintf(mem_ctx, "%s.%s",
  60                                         lpcfg_netbios_name(lp_ctx),
  61                                         lpcfg_dnsdomain(lp_ctx));
  62
  63         domain_dn = ldb_get_default_basedn(samdb);
  64         forest_dn = ldb_get_root_basedn(samdb);
  65
  66         serverinfo->pszDsContainer = talloc_asprintf(mem_ctx,
  67                                         "CN=MicrosoftDNS,DC=DomainDnsZones,%s",
  68                                         ldb_dn_get_linearized(domain_dn));
  69
  70         serverinfo->dwDsForestVersion = dsdb_forest_functional_level(samdb);
  71         serverinfo->dwDsDomainVersion = dsdb_functional_level(samdb);
  72         serverinfo->dwDsDsaVersion = 4; /* need to do ldb search here */
  73
  74         serverinfo->pszDomainName = samdb_dn_to_dns_domain(mem_ctx, domain_dn);
  75         serverinfo->pszForestName = samdb_dn_to_dns_domain(mem_ctx, forest_dn);
  76
  77         serverinfo->pszDomainDirectoryPartition = talloc_asprintf(mem_ctx,
  78                                                         "DC=DomainDnsZones,%s",
  79                                                         ldb_dn_get_linearized(domain_dn));
  80         serverinfo->pszForestDirectoryPartition = talloc_asprintf(mem_ctx,
  81                                                         "DC=ForestDnsZones,%s",
  82                                                         ldb_dn_get_linearized(forest_dn));
  83
  84         load_interface_list(mem_ctx, lp_ctx, &ifaces);
  85         num_interfaces = iface_list_count(ifaces);
  86
  87         serverinfo->aipServerAddrs = talloc_zero(mem_ctx, struct IP4_ARRAY);
  88
  89         if (serverinfo->aipServerAddrs) {
  90                 serverinfo->aipServerAddrs->AddrCount = num_interfaces;
  91                 if (num_interfaces > 0) {
  92                         serverinfo->aipServerAddrs->AddrArray = talloc_zero_array(mem_ctx,
  93                                                                         unsigned int,
  94                                                                         num_interfaces);
  95                         if (serverinfo->aipServerAddrs->AddrArray) {
  96                                 for (i=0; i<num_interfaces; i++) {
  97                                         serverinfo->aipServerAddrs->AddrArray[i] = inet_addr(iface_list_n_ip(ifaces, i));
  98                                 }
  99                         } else {
 100                                 serverinfo->aipServerAddrs->AddrCount = 0;
 101                         }
 102                 }
 103         }
 104         talloc_free(ifaces);
 105
 106         /* Assume listen addresses are same as server addresses */
 107         serverinfo->aipListenAddrs = serverinfo->aipServerAddrs;
 108
 109         serverinfo->aipForwarders = NULL;
 110
 111         serverinfo->aipLogFilter = NULL;
 112         serverinfo->pwszLogFilePath = NULL;
 113
 114         serverinfo->dwLogLevel = 0;
 115         serverinfo->dwDebugLevel = 0;
 116         serverinfo->dwEventLogLevel = DNS_EVENT_LOG_INFORMATION_TYPE;
 117         serverinfo->dwLogFileMaxSize = 0;
 118
 119         serverinfo->dwForwardTimeout = 3; /* seconds (default) */
 120         serverinfo->dwRpcProtocol = 5;
 121         serverinfo->dwNameCheckFlag = DNS_ALLOW_MULTIBYTE_NAMES;
 122         serverinfo->cAddressAnswerLimit = 0;
 123         serverinfo->dwRecursionRetry = 3 /* seconds (default) */;
 124         serverinfo->dwRecursionTimeout = 8 /* seconds (default) */;
 125         serverinfo->dwMaxCacheTtl = 0x00015180; /* 1 day (default) */;
 126         serverinfo->dwDsPollingInterval = 0xB4; /* 3 minutes (default) */;
 127         serverinfo->dwLocalNetPriorityNetMask = 0x000000FF;;
 128
 129         serverinfo->dwScavengingInterval = 0;
 130         serverinfo->dwDefaultRefreshInterval = 0xA8; /* 7 days in hours */;
 131         serverinfo->dwDefaultNoRefreshInterval = 0xA8; /* 7 days in hours */;;
 132         serverinfo->dwLastScavengeTime = 0;
 133
 134         serverinfo->fAutoReverseZones = 0;
 135         serverinfo->fAutoCacheUpdate = 0;
 136
 137         serverinfo->fRecurseAfterForwarding = 0;
 138         serverinfo->fForwardDelegations = 1;
 139         serverinfo->fNoRecursion = 0;
 140         serverinfo->fSecureResponses = 0;
 141
 142         serverinfo->fRoundRobin = 1;
 143         serverinfo->fLocalNetPriority = 0;
 144
 145         serverinfo->fBindSecondaries = 0;
 146         serverinfo->fWriteAuthorityNs = 0;
 147
 148         serverinfo->fStrictFileParsing = 0;
 149         serverinfo->fLooseWildcarding = 0 ;
 150         serverinfo->fDefaultAgingState = 0;
 151
 152         return serverinfo;
 153 }
 154
 155
 156 struct dnsserver_zoneinfo *dnsserver_init_zoneinfo(struct dnsserver_zone *zone,
 157                                                 struct dnsserver_serverinfo *serverinfo,
 158                                                 bool is_forest)
 159 {
 160         struct dnsserver_zoneinfo *zoneinfo;
 161         uint32_t dp_flags;
 162         uint32_t fReverse;
 163         const char *revzone = "in-addr.arpa";
 164         int len1, len2;
 165
 166         zoneinfo = talloc_zero(zone, struct dnsserver_zoneinfo);
 167         if (zoneinfo == NULL) {
 168                 return NULL;
 169         }
 170
 171         dp_flags = DNS_DP_AUTOCREATED | DNS_DP_ENLISTED;
 172         if (is_forest) {
 173                 dp_flags |= DNS_DP_FOREST_DEFAULT;
 174         } else {
 175                 dp_flags |= DNS_DP_DOMAIN_DEFAULT;
 176         }
 177
 178         /* If the zone name ends with in-addr.arpa, it's reverse zone */
 179         fReverse = 0;
 180         len1 = strlen(zone->name);
 181         len2 = strlen(revzone);
 182         if (len1 > len2 && strcmp(&zone->name[len1-len2], revzone) == 0) {
 183                 fReverse = 1;
 184         }
 185
 186         zoneinfo->Version = 0x32;
 187         zoneinfo->Flags = DNS_RPC_ZONE_DSINTEGRATED | DNS_RPC_ZONE_UPDATE_SECURE;
 188         zoneinfo->dwZoneType = DNS_ZONE_TYPE_PRIMARY;
 189         zoneinfo->fReverse = fReverse;
 190         zoneinfo->fAllowUpdate = DNS_ZONE_UPDATE_SECURE;
 191         zoneinfo->fPaused = 0;
 192         zoneinfo->fShutdown = 0;
 193         zoneinfo->fAutoCreated = 0;
 194         zoneinfo->fUseDatabase = 1;
 195         zoneinfo->pszDataFile = NULL;
 196         zoneinfo->aipMasters = NULL;
 197         zoneinfo->fSecureSecondaries = DNS_ZONE_SECSECURE_NO_XFER;
 198         zoneinfo->fNotifyLevel = DNS_ZONE_NOTIFY_LIST_ONLY;
 199         zoneinfo->aipSecondaries = NULL;
 200         zoneinfo->aipNotify = NULL;
 201         zoneinfo->fUseWins = 0;
 202         zoneinfo->fUseNbstat = 0;
 203         zoneinfo->fAging = 0;
 204         zoneinfo->dwNoRefreshInterval = serverinfo->dwDefaultNoRefreshInterval;
 205         zoneinfo->dwRefreshInterval = serverinfo->dwDefaultRefreshInterval;
 206         zoneinfo->dwAvailForScavengeTime = 0;
 207         zoneinfo->aipScavengeServers = NULL;
 208         zoneinfo->dwForwarderTimeout = 0;
 209         zoneinfo->fForwarderSlave = 0;
 210         zoneinfo->aipLocalMasters = NULL;
 211         zoneinfo->dwDpFlags = dp_flags;
 212         zoneinfo->pszDpFqdn = samdb_dn_to_dns_domain(zone, zone->partition_dn);
 213         zoneinfo->pwszZoneDn = discard_const_p(char, ldb_dn_get_linearized(zone->zone_dn));
 214         zoneinfo->dwLastSuccessfulSoaCheck = 0;
 215         zoneinfo->dwLastSuccessfulXfr = 0;
 216         zoneinfo->fQueuedForBackgroundLoad = 0;
 217         zoneinfo->fBackgroundLoadInProgress = 0;
 218         zoneinfo->fReadOnlyZone = 0;
 219         zoneinfo->dwLastXfrAttempt = 0;
 220         zoneinfo->dwLastXfrResult = 0;
 221
 222         return zoneinfo;
 223 }
 224
 225 struct dnsserver_zone *dnsserver_find_zone(struct dnsserver_zone *zones, const char *zone_name)
 226 {
 227         struct dnsserver_zone *z = NULL;
 228
 229         for (z = zones; z; z = z->next) {
 230                 if (strcmp(zone_name, z->name) == 0) {
 231                         break;
 232                 }
 233         }
 234
 235         return z;
 236 }
 237
 238 struct ldb_dn *dnsserver_name_to_dn(TALLOC_CTX *mem_ctx, struct dnsserver_zone *z, const char *name)
 239 {
 240         struct ldb_dn *dn;
 241         bool ret;
 242
 243         dn = ldb_dn_copy(mem_ctx, z->zone_dn);
 244         if (dn == NULL) {
 245                 return NULL;
 246         }
 247         if (strcmp(name, z->name) == 0) {
 248                 ret = ldb_dn_add_child_fmt(dn, "DC=@");
 249         } else {
 250                 ret = ldb_dn_add_child_fmt(dn, "DC=%s", name);
 251         }
 252         if (!ret) {
 253                 talloc_free(dn);
 254                 return NULL;
 255         }
 256
 257         return dn;
 258 }
 259
 260 uint32_t dnsserver_zone_to_request_filter(const char *zone_name)
 261 {
 262         uint32_t request_filter;
 263
 264         if (strcmp(zone_name, "..AllZones") == 0) {
 265                 request_filter = DNS_ZONE_REQUEST_PRIMARY
 266                         | DNS_ZONE_REQUEST_SECONDARY
 267                         | DNS_ZONE_REQUEST_AUTO
 268                         | DNS_ZONE_REQUEST_FORWARD
 269                         | DNS_ZONE_REQUEST_REVERSE
 270                         | DNS_ZONE_REQUEST_FORWARDER
 271                         | DNS_ZONE_REQUEST_STUB
 272                         | DNS_ZONE_REQUEST_DS
 273                         | DNS_ZONE_REQUEST_NON_DS
 274                         | DNS_ZONE_REQUEST_DOMAIN_DP
 275                         | DNS_ZONE_REQUEST_FOREST_DP
 276                         | DNS_ZONE_REQUEST_CUSTOM_DP
 277                         | DNS_ZONE_REQUEST_LEGACY_DP;
 278         } else if (strcmp(zone_name, "..AllZonesAndCache") == 0) {
 279                 request_filter = DNS_ZONE_REQUEST_PRIMARY
 280                         | DNS_ZONE_REQUEST_SECONDARY
 281                         | DNS_ZONE_REQUEST_CACHE
 282                         | DNS_ZONE_REQUEST_AUTO
 283                         | DNS_ZONE_REQUEST_FORWARD
 284                         | DNS_ZONE_REQUEST_REVERSE
 285                         | DNS_ZONE_REQUEST_FORWARDER
 286                         | DNS_ZONE_REQUEST_STUB
 287                         | DNS_ZONE_REQUEST_DS
 288                         | DNS_ZONE_REQUEST_NON_DS
 289                         | DNS_ZONE_REQUEST_DOMAIN_DP
 290                         | DNS_ZONE_REQUEST_FOREST_DP
 291                         | DNS_ZONE_REQUEST_CUSTOM_DP
 292                         | DNS_ZONE_REQUEST_LEGACY_DP;
 293         } else if (strcmp(zone_name, "..AllPrimaryZones") == 0) {
 294                 request_filter = DNS_ZONE_REQUEST_PRIMARY;
 295         } else if (strcmp(zone_name, "..AllSecondaryZones") == 0) {
 296                 request_filter = DNS_ZONE_REQUEST_SECONDARY;
 297         } else if (strcmp(zone_name, "..AllForwardZones") == 0) {
 298                 request_filter = DNS_ZONE_REQUEST_FORWARD;
 299         } else if (strcmp(zone_name, "..AllReverseZones") == 0) {
 300                 request_filter = DNS_ZONE_REQUEST_REVERSE;
 301         } else if (strcmp(zone_name, "..AllDsZones") == 0) {
 302                 request_filter = DNS_ZONE_REQUEST_DS;
 303         } else if (strcmp(zone_name, "..AllNonDsZones") == 0) {
 304                 request_filter = DNS_ZONE_REQUEST_NON_DS;
 305         } else if (strcmp(zone_name, "..AllPrimaryReverseZones") == 0) {
 306                 request_filter = DNS_ZONE_REQUEST_PRIMARY
 307                         | DNS_ZONE_REQUEST_REVERSE;
 308         } else if (strcmp(zone_name, "..AllPrimaryForwardZones") == 0) {
 309                 request_filter = DNS_ZONE_REQUEST_PRIMARY
 310                         | DNS_ZONE_REQUEST_FORWARD;
 311         } else if (strcmp(zone_name, "..AllSecondaryReverseZones") == 0) {
 312                 request_filter = DNS_ZONE_REQUEST_SECONDARY
 313                         | DNS_ZONE_REQUEST_REVERSE;
 314         } else if (strcmp(zone_name, "..AllSecondaryForwardZones") == 0) {
 315                 request_filter = DNS_ZONE_REQUEST_SECONDARY
 316                         | DNS_ZONE_REQUEST_REVERSE;
 317         }
 318
 319         return request_filter;
 320 }