source3/utils/net_lookup.c

   1 /*
   2    Samba Unix/Linux SMB client library
   3    net lookup command
   4    Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include "includes.h"
  20 #include "utils/net.h"
  21 #include "libads/sitename_cache.h"
  22 #include "libads/dns.h"
  23 #include "../librpc/gen_ndr/ndr_netlogon.h"
  24 #include "smb_krb5.h"
  25
  26 int net_lookup_usage(struct net_context *c, int argc, const char **argv)
  27 {
  28         d_printf(_(
  29 "  net lookup [host] HOSTNAME[#<type>]\n\tgives IP for a hostname\n\n"
  30 "  net lookup ldap [domain]\n\tgives IP of domain's ldap server\n\n"
  31 "  net lookup kdc [realm]\n\tgives IP of realm's kerberos KDC\n\n"
  32 "  net lookup pdc [domain|realm]\n\tgives IP of realm's kerberos KDC\n\n"
  33 "  net lookup dc [domain]\n\tgives IP of domains Domain Controllers\n\n"
  34 "  net lookup master [domain|wg]\n\tgive IP of master browser\n\n"
  35 "  net lookup name [name]\n\tLookup name's sid and type\n\n"
  36 "  net lookup sid [sid]\n\tGive sid's name and type\n\n"
  37 "  net lookup dsgetdcname [name] [flags] [sitename]\n\n"
  38 ));
  39         return -1;
  40 }
  41
  42 /* lookup a hostname giving an IP */
  43 static int net_lookup_host(struct net_context *c, int argc, const char **argv)
  44 {
  45         struct sockaddr_storage ss;
  46         int name_type = 0x20;
  47         char addr[INET6_ADDRSTRLEN];
  48         const char *name = argv[0];
  49         char *p;
  50
  51         if (argc == 0)
  52                 return net_lookup_usage(c, argc, argv);
  53
  54         p = strchr_m(name,'#');
  55         if (p) {
  56                 *p = '\0';
  57                 sscanf(++p,"%x",&name_type);
  58         }
  59
  60         if (!resolve_name(name, &ss, name_type, false)) {
  61                 /* we deliberately use DEBUG() here to send it to stderr
  62                    so scripts aren't mucked up */
  63                 DEBUG(0,("Didn't find %s#%02x\n", name, name_type));
  64                 return -1;
  65         }
  66
  67         print_sockaddr(addr, sizeof(addr), &ss);
  68         d_printf("%s\n", addr);
  69         return 0;
  70 }
  71
  72 #ifdef HAVE_ADS
  73 static void print_ldap_srvlist(struct dns_rr_srv *dclist, int numdcs )
  74 {
  75         struct sockaddr_storage ss;
  76         int i;
  77
  78         for ( i=0; i<numdcs; i++ ) {
  79                 if (resolve_name(dclist[i].hostname, &ss, 0x20, true) ) {
  80                         char addr[INET6_ADDRSTRLEN];
  81                         print_sockaddr(addr, sizeof(addr), &ss);
  82 #ifdef HAVE_IPV6
  83                         if (ss.ss_family == AF_INET6) {
  84                                 d_printf("[%s]:%d\n", addr, dclist[i].port);
  85                         }
  86 #endif
  87                         if (ss.ss_family == AF_INET) {
  88                                 d_printf("%s:%d\n", addr, dclist[i].port);
  89                         }
  90                 }
  91         }
  92 }
  93 #endif
  94
  95 static int net_lookup_ldap(struct net_context *c, int argc, const char **argv)
  96 {
  97 #ifdef HAVE_ADS
  98         const char *domain;
  99         struct sockaddr_storage ss;
 100         struct dns_rr_srv *dcs = NULL;
 101         int numdcs = 0;
 102         char *sitename;
 103         TALLOC_CTX *ctx;
 104         NTSTATUS status;
 105         int ret;
 106         char h_name[MAX_DNS_NAME_LENGTH];
 107
 108         if (argc > 0)
 109                 domain = argv[0];
 110         else
 111                 domain = c->opt_target_workgroup;
 112
 113         sitename = sitename_fetch(domain);
 114
 115         if ( (ctx = talloc_init("net_lookup_ldap")) == NULL ) {
 116                 d_fprintf(stderr,"net_lookup_ldap: talloc_init() %s!\n",
 117                           _("failed"));
 118                 SAFE_FREE(sitename);
 119                 return -1;
 120         }
 121
 122         DEBUG(9, ("Lookup up ldap for domain %s\n", domain));
 123
 124         status = ads_dns_query_dcs( ctx, domain, sitename, &dcs, &numdcs );
 125         if ( NT_STATUS_IS_OK(status) && numdcs ) {
 126                 print_ldap_srvlist(dcs, numdcs);
 127                 TALLOC_FREE( ctx );
 128                 SAFE_FREE(sitename);
 129                 return 0;
 130         }
 131
 132         DEBUG(9, ("Looking up PDC for domain %s\n", domain));
 133         if (!get_pdc_ip(domain, &ss)) {
 134                 TALLOC_FREE( ctx );
 135                 SAFE_FREE(sitename);
 136                 return -1;
 137         }
 138
 139         ret = sys_getnameinfo((struct sockaddr *)&ss,
 140                         sizeof(struct sockaddr_storage),
 141                         h_name, sizeof(h_name),
 142                         NULL, 0,
 143                         NI_NAMEREQD);
 144
 145         if (ret) {
 146                 TALLOC_FREE( ctx );
 147                 SAFE_FREE(sitename);
 148                 return -1;
 149         }
 150
 151         DEBUG(9, ("Found PDC with DNS name %s\n", h_name));
 152         domain = strchr(h_name, '.');
 153         if (!domain) {
 154                 TALLOC_FREE( ctx );
 155                 SAFE_FREE(sitename);
 156                 return -1;
 157         }
 158         domain++;
 159
 160         DEBUG(9, ("Looking up ldap for domain %s\n", domain));
 161
 162         status = ads_dns_query_dcs( ctx, domain, sitename, &dcs, &numdcs );
 163         if ( NT_STATUS_IS_OK(status) && numdcs ) {
 164                 print_ldap_srvlist(dcs, numdcs);
 165                 TALLOC_FREE( ctx );
 166                 SAFE_FREE(sitename);
 167                 return 0;
 168         }
 169
 170         TALLOC_FREE( ctx );
 171         SAFE_FREE(sitename);
 172
 173         return -1;
 174 #endif
 175         DEBUG(1,("No ADS support\n"));
 176         return -1;
 177 }
 178
 179 static int net_lookup_dc(struct net_context *c, int argc, const char **argv)
 180 {
 181         struct ip_service *ip_list;
 182         struct sockaddr_storage ss;
 183         char *pdc_str = NULL;
 184         const char *domain = NULL;
 185         char *sitename = NULL;
 186         int count, i;
 187         char addr[INET6_ADDRSTRLEN];
 188         bool sec_ads = (lp_security() == SEC_ADS);
 189
 190         if (sec_ads) {
 191                 domain = lp_realm();
 192         } else {
 193                 domain = c->opt_target_workgroup;
 194         }
 195
 196         if (argc > 0)
 197                 domain=argv[0];
 198
 199         /* first get PDC */
 200         if (!get_pdc_ip(domain, &ss))
 201                 return -1;
 202
 203         print_sockaddr(addr, sizeof(addr), &ss);
 204         if (asprintf(&pdc_str, "%s", addr) == -1) {
 205                 return -1;
 206         }
 207         d_printf("%s\n", pdc_str);
 208
 209         sitename = sitename_fetch(domain);
 210         if (!NT_STATUS_IS_OK(get_sorted_dc_list(domain, sitename,
 211                                         &ip_list, &count, sec_ads))) {
 212                 SAFE_FREE(pdc_str);
 213                 SAFE_FREE(sitename);
 214                 return 0;
 215         }
 216         SAFE_FREE(sitename);
 217         for (i=0;i<count;i++) {
 218                 print_sockaddr(addr, sizeof(addr), &ip_list[i].ss);
 219                 if (!strequal(pdc_str, addr))
 220                         d_printf("%s\n", addr);
 221         }
 222         SAFE_FREE(pdc_str);
 223         return 0;
 224 }
 225
 226 static int net_lookup_pdc(struct net_context *c, int argc, const char **argv)
 227 {
 228         struct sockaddr_storage ss;
 229         char *pdc_str = NULL;
 230         const char *domain;
 231         char addr[INET6_ADDRSTRLEN];
 232
 233         if (lp_security() == SEC_ADS) {
 234                 domain = lp_realm();
 235         } else {
 236                 domain = c->opt_target_workgroup;
 237         }
 238
 239         if (argc > 0)
 240                 domain=argv[0];
 241
 242         /* first get PDC */
 243         if (!get_pdc_ip(domain, &ss))
 244                 return -1;
 245
 246         print_sockaddr(addr, sizeof(addr), &ss);
 247         if (asprintf(&pdc_str, "%s", addr) == -1) {
 248                 return -1;
 249         }
 250         d_printf("%s\n", pdc_str);
 251         SAFE_FREE(pdc_str);
 252         return 0;
 253 }
 254
 255
 256 static int net_lookup_master(struct net_context *c, int argc, const char **argv)
 257 {
 258         struct sockaddr_storage master_ss;
 259         const char *domain = c->opt_target_workgroup;
 260         char addr[INET6_ADDRSTRLEN];
 261
 262         if (argc > 0)
 263                 domain=argv[0];
 264
 265         if (!find_master_ip(domain, &master_ss))
 266                 return -1;
 267         print_sockaddr(addr, sizeof(addr), &master_ss);
 268         d_printf("%s\n", addr);
 269         return 0;
 270 }
 271
 272 static int net_lookup_kdc(struct net_context *c, int argc, const char **argv)
 273 {
 274 #ifdef HAVE_KRB5
 275         krb5_error_code rc;
 276         krb5_context ctx;
 277         struct sockaddr_in *addrs;
 278         int num_kdcs,i;
 279         krb5_data realm;
 280         char **realms;
 281
 282         initialize_krb5_error_table();
 283         rc = krb5_init_context(&ctx);
 284         if (rc) {
 285                 DEBUG(1,("krb5_init_context failed (%s)\n",
 286                          error_message(rc)));
 287                 return -1;
 288         }
 289
 290         if (argc>0) {
 291                 realm.data = CONST_DISCARD(char *, argv[0]);
 292                 realm.length = strlen(argv[0]);
 293         } else if (lp_realm() && *lp_realm()) {
 294                 realm.data = lp_realm();
 295                 realm.length = strlen((const char *)realm.data);
 296         } else {
 297                 rc = krb5_get_host_realm(ctx, NULL, &realms);
 298                 if (rc) {
 299                         DEBUG(1,("krb5_gethost_realm failed (%s)\n",
 300                                  error_message(rc)));
 301                         return -1;
 302                 }
 303                 realm.data = (char *) *realms;
 304                 realm.length = strlen((const char *)realm.data);
 305         }
 306
 307         rc = smb_krb5_locate_kdc(ctx, &realm, (struct sockaddr **)(void *)&addrs, &num_kdcs, 0);
 308         if (rc) {
 309                 DEBUG(1, ("smb_krb5_locate_kdc failed (%s)\n", error_message(rc)));
 310                 return -1;
 311         }
 312         for (i=0;i<num_kdcs;i++)
 313                 if (addrs[i].sin_family == AF_INET)
 314                         d_printf("%s:%hd\n", inet_ntoa(addrs[i].sin_addr),
 315                                  ntohs(addrs[i].sin_port));
 316         return 0;
 317
 318 #endif
 319         DEBUG(1, ("No kerberos support\n"));
 320         return -1;
 321 }
 322
 323 static int net_lookup_name(struct net_context *c, int argc, const char **argv)
 324 {
 325         const char *dom, *name;
 326         struct dom_sid sid;
 327         enum lsa_SidType type;
 328
 329         if (argc != 1) {
 330                 d_printf("%s\n%s",
 331                          _("Usage:"),
 332                          _(" net lookup name <name>\n"));
 333                 return -1;
 334         }
 335
 336         if (!lookup_name(talloc_tos(), argv[0], LOOKUP_NAME_ALL,
 337                          &dom, &name, &sid, &type)) {
 338                 d_printf(_("Could not lookup name %s\n"), argv[0]);
 339                 return -1;
 340         }
 341
 342         d_printf("%s %d (%s) %s\\%s\n", sid_string_tos(&sid),
 343                  type, sid_type_lookup(type), dom, name);
 344         return 0;
 345 }
 346
 347 static int net_lookup_sid(struct net_context *c, int argc, const char **argv)
 348 {
 349         const char *dom, *name;
 350         struct dom_sid sid;
 351         enum lsa_SidType type;
 352
 353         if (argc != 1) {
 354                 d_printf("%s\n%s",
 355                          _("Usage:"),
 356                          _(" net lookup sid <sid>\n"));
 357                 return -1;
 358         }
 359
 360         if (!string_to_sid(&sid, argv[0])) {
 361                 d_printf(_("Could not convert %s to SID\n"), argv[0]);
 362                 return -1;
 363         }
 364
 365         if (!lookup_sid(talloc_tos(), &sid,
 366                         &dom, &name, &type)) {
 367                 d_printf(_("Could not lookup name %s\n"), argv[0]);
 368                 return -1;
 369         }
 370
 371         d_printf("%s %d (%s) %s\\%s\n", sid_string_tos(&sid),
 372                  type, sid_type_lookup(type), dom, name);
 373         return 0;
 374 }
 375
 376 static int net_lookup_dsgetdcname(struct net_context *c, int argc, const char **argv)
 377 {
 378         NTSTATUS status;
 379         const char *domain_name = NULL;
 380         const char *site_name = NULL;
 381         uint32_t flags = 0;
 382         struct netr_DsRGetDCNameInfo *info = NULL;
 383         TALLOC_CTX *mem_ctx;
 384         char *s = NULL;
 385
 386         if (argc < 1 || argc > 3) {
 387                 d_printf("%s\n%s",
 388                          _("Usage:"),
 389                          _(" net lookup dsgetdcname "
 390                            "<name> <flags> <sitename>\n"));
 391                 return -1;
 392         }
 393
 394         mem_ctx = talloc_init("net_lookup_dsgetdcname");
 395         if (!mem_ctx) {
 396                 return -1;
 397         }
 398
 399         domain_name = argv[0];
 400
 401         if (argc >= 2)
 402                 sscanf(argv[1], "%x", &flags);
 403
 404         if (!flags) {
 405                 flags |= DS_DIRECTORY_SERVICE_REQUIRED;
 406         }
 407
 408         if (argc == 3) {
 409                 site_name = argv[2];
 410         }
 411
 412         status = dsgetdcname(mem_ctx, NULL, domain_name, NULL, site_name,
 413                              flags, &info);
 414         if (!NT_STATUS_IS_OK(status)) {
 415                 d_printf(_("failed with: %s\n"), nt_errstr(status));
 416                 TALLOC_FREE(mem_ctx);
 417                 return -1;
 418         }
 419
 420         s = NDR_PRINT_STRUCT_STRING(mem_ctx, netr_DsRGetDCNameInfo, info);
 421         printf("%s\n", s);
 422         TALLOC_FREE(s);
 423
 424         TALLOC_FREE(mem_ctx);
 425         return 0;
 426 }
 427
 428
 429 /* lookup hosts or IP addresses using internal samba lookup fns */
 430 int net_lookup(struct net_context *c, int argc, const char **argv)
 431 {
 432         int i;
 433
 434         struct functable table[] = {
 435                 {"HOST", net_lookup_host},
 436                 {"LDAP", net_lookup_ldap},
 437                 {"DC", net_lookup_dc},
 438                 {"PDC", net_lookup_pdc},
 439                 {"MASTER", net_lookup_master},
 440                 {"KDC", net_lookup_kdc},
 441                 {"NAME", net_lookup_name},
 442                 {"SID", net_lookup_sid},
 443                 {"DSGETDCNAME", net_lookup_dsgetdcname},
 444                 {NULL, NULL}
 445         };
 446
 447         if (argc < 1) {
 448                 d_printf(_("\nUsage: \n"));
 449                 return net_lookup_usage(c, argc, argv);
 450         }
 451         for (i=0; table[i].funcname; i++) {
 452                 if (StrCaseCmp(argv[0], table[i].funcname) == 0)
 453                         return table[i].fn(c, argc-1, argv+1);
 454         }
 455
 456         /* Default to lookup a hostname so 'net lookup foo#1b' can be
 457            used instead of 'net lookup host foo#1b'.  The host syntax
 458            is a bit confusing as non #00 names can't really be
 459            considered hosts as such. */
 460
 461         return net_lookup_host(c, argc, argv);
 462 }