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