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 "../lib/addns/dnsquery.h"
  23 #include "../librpc/gen_ndr/ndr_netlogon.h"
  24 #include "smb_krb5.h"
  25 #include "../libcli/security/security.h"
  26 #include "passdb/lookup_sid.h"
  27
  28 int net_lookup_usage(struct net_context *c, int argc, const char **argv)
  29 {
  30         d_printf(_(
  31 "  net lookup [host] HOSTNAME[#<type>]\n\tgives IP for a hostname\n\n"
  32 "  net lookup ldap [domain]\n\tgives IP of domain's ldap server\n\n"
  33 "  net lookup kdc [realm]\n\tgives IP of realm's kerberos KDC\n\n"
  34 "  net lookup pdc [domain|realm]\n\tgives IP of realm's kerberos KDC\n\n"
  35 "  net lookup dc [domain]\n\tgives IP of domains Domain Controllers\n\n"
  36 "  net lookup master [domain|wg]\n\tgive IP of master browser\n\n"
  37 "  net lookup name [name]\n\tLookup name's sid and type\n\n"
  38 "  net lookup sid [sid]\n\tGive sid's name and type\n\n"
  39 "  net lookup dsgetdcname [name] [flags] [sitename]\n\n"
  40 ));
  41         return -1;
  42 }
  43
  44 /* lookup a hostname giving an IP */
  45 static int net_lookup_host(struct net_context *c, int argc, const char **argv)
  46 {
  47         struct sockaddr_storage ss;
  48         int name_type = 0x20;
  49         char addr[INET6_ADDRSTRLEN];
  50         const char *name = argv[0];
  51         char *p;
  52
  53         if (argc == 0)
  54                 return net_lookup_usage(c, argc, argv);
  55
  56         p = strchr_m(name,'#');
  57         if (p) {
  58                 *p = '\0';
  59                 sscanf(++p,"%x",&name_type);
  60         }
  61
  62         if (!resolve_name(name, &ss, name_type, false)) {
  63                 /* we deliberately use DEBUG() here to send it to stderr
  64                    so scripts aren't mucked up */
  65                 DEBUG(0,("Didn't find %s#%02x\n", name, name_type));
  66                 return -1;
  67         }
  68
  69         print_sockaddr(addr, sizeof(addr), &ss);
  70         d_printf("%s\n", addr);
  71         return 0;
  72 }
  73
  74 #ifdef HAVE_ADS
  75 static void print_ldap_srvlist(struct dns_rr_srv *dclist, int numdcs )
  76 {
  77         struct sockaddr_storage ss;
  78         int i;
  79
  80         for ( i=0; i<numdcs; i++ ) {
  81                 if (resolve_name(dclist[i].hostname, &ss, 0x20, true) ) {
  82                         char addr[INET6_ADDRSTRLEN];
  83                         print_sockaddr(addr, sizeof(addr), &ss);
  84 #ifdef HAVE_IPV6
  85                         if (ss.ss_family == AF_INET6) {
  86                                 d_printf("[%s]:%d\n", addr, dclist[i].port);
  87                         }
  88 #endif
  89                         if (ss.ss_family == AF_INET) {
  90                                 d_printf("%s:%d\n", addr, dclist[i].port);
  91                         }
  92                 }
  93         }
  94 }
  95 #endif
  96
  97 static int net_lookup_ldap(struct net_context *c, int argc, const char **argv)
  98 {
  99 #ifdef HAVE_ADS
 100         const char *domain;
 101         struct sockaddr_storage ss;
 102         struct dns_rr_srv *dcs = NULL;
 103         int numdcs = 0;
 104         char *sitename;
 105         TALLOC_CTX *ctx;
 106         NTSTATUS status;
 107         int ret;
 108         char h_name[MAX_DNS_NAME_LENGTH];
 109         const char *dns_hosts_file;
 110
 111         if (argc > 0)
 112                 domain = argv[0];
 113         else
 114                 domain = c->opt_target_workgroup;
 115
 116         if ( (ctx = talloc_init("net_lookup_ldap")) == NULL ) {
 117                 d_fprintf(stderr,"net_lookup_ldap: talloc_init() %s!\n",
 118                           _("failed"));
 119                 return -1;
 120         }
 121
 122         sitename = sitename_fetch(ctx, domain);
 123
 124         DEBUG(9, ("Lookup up ldap for domain %s\n", domain));
 125
 126         dns_hosts_file = lp_parm_const_string(-1, "resolv", "host file", NULL);
 127         status = ads_dns_query_dcs(ctx, dns_hosts_file, domain, sitename,
 128                                    &dcs, &numdcs);
 129         if ( NT_STATUS_IS_OK(status) && numdcs ) {
 130                 print_ldap_srvlist(dcs, numdcs);
 131                 TALLOC_FREE( ctx );
 132                 return 0;
 133         }
 134
 135         DEBUG(9, ("Looking up PDC for domain %s\n", domain));
 136         if (!get_pdc_ip(domain, &ss)) {
 137                 TALLOC_FREE( ctx );
 138                 return -1;
 139         }
 140
 141         ret = sys_getnameinfo((struct sockaddr *)&ss,
 142                         sizeof(struct sockaddr_storage),
 143                         h_name, sizeof(h_name),
 144                         NULL, 0,
 145                         NI_NAMEREQD);
 146
 147         if (ret) {
 148                 TALLOC_FREE( ctx );
 149                 return -1;
 150         }
 151
 152         DEBUG(9, ("Found PDC with DNS name %s\n", h_name));
 153         domain = strchr(h_name, '.');
 154         if (!domain) {
 155                 TALLOC_FREE( ctx );
 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, dns_hosts_file, domain, sitename,
 163                                    &dcs, &numdcs);
 164         if ( NT_STATUS_IS_OK(status) && numdcs ) {
 165                 print_ldap_srvlist(dcs, numdcs);
 166                 TALLOC_FREE( ctx );
 167                 return 0;
 168         }
 169
 170         TALLOC_FREE( ctx );
 171
 172         return -1;
 173 #endif
 174         DEBUG(1,("No ADS support\n"));
 175         return -1;
 176 }
 177
 178 static int net_lookup_dc(struct net_context *c, int argc, const char **argv)
 179 {
 180         struct ip_service *ip_list;
 181         struct sockaddr_storage ss;
 182         char *pdc_str = NULL;
 183         const char *domain = NULL;
 184         char *sitename = NULL;
 185         int count, i;
 186         char addr[INET6_ADDRSTRLEN];
 187         bool sec_ads = (lp_security() == SEC_ADS);
 188
 189         if (sec_ads) {
 190                 domain = lp_realm();
 191         } else {
 192                 domain = c->opt_target_workgroup;
 193         }
 194
 195         if (argc > 0)
 196                 domain=argv[0];
 197
 198         /* first get PDC */
 199         if (!get_pdc_ip(domain, &ss))
 200                 return -1;
 201
 202         print_sockaddr(addr, sizeof(addr), &ss);
 203         if (asprintf(&pdc_str, "%s", addr) == -1) {
 204                 return -1;
 205         }
 206         d_printf("%s\n", pdc_str);
 207
 208         sitename = sitename_fetch(talloc_tos(), domain);
 209         if (!NT_STATUS_IS_OK(get_sorted_dc_list(domain, sitename,
 210                                         &ip_list, &count, sec_ads))) {
 211                 SAFE_FREE(pdc_str);
 212                 TALLOC_FREE(sitename);
 213                 return 0;
 214         }
 215         TALLOC_FREE(sitename);
 216         for (i=0;i<count;i++) {
 217                 print_sockaddr(addr, sizeof(addr), &ip_list[i].ss);
 218                 if (!strequal(pdc_str, addr))
 219                         d_printf("%s\n", addr);
 220         }
 221         SAFE_FREE(pdc_str);
 222         return 0;
 223 }
 224
 225 static int net_lookup_pdc(struct net_context *c, int argc, const char **argv)
 226 {
 227         struct sockaddr_storage ss;
 228         char *pdc_str = NULL;
 229         const char *domain;
 230         char addr[INET6_ADDRSTRLEN];
 231
 232         if (lp_security() == SEC_ADS) {
 233                 domain = lp_realm();
 234         } else {
 235                 domain = c->opt_target_workgroup;
 236         }
 237
 238         if (argc > 0)
 239                 domain=argv[0];
 240
 241         /* first get PDC */
 242         if (!get_pdc_ip(domain, &ss))
 243                 return -1;
 244
 245         print_sockaddr(addr, sizeof(addr), &ss);
 246         if (asprintf(&pdc_str, "%s", addr) == -1) {
 247                 return -1;
 248         }
 249         d_printf("%s\n", pdc_str);
 250         SAFE_FREE(pdc_str);
 251         return 0;
 252 }
 253
 254
 255 static int net_lookup_master(struct net_context *c, int argc, const char **argv)
 256 {
 257         struct sockaddr_storage master_ss;
 258         const char *domain = c->opt_target_workgroup;
 259         char addr[INET6_ADDRSTRLEN];
 260
 261         if (argc > 0)
 262                 domain=argv[0];
 263
 264         if (!find_master_ip(domain, &master_ss))
 265                 return -1;
 266         print_sockaddr(addr, sizeof(addr), &master_ss);
 267         d_printf("%s\n", addr);
 268         return 0;
 269 }
 270
 271 static int net_lookup_kdc(struct net_context *c, int argc, const char **argv)
 272 {
 273 #ifdef HAVE_KRB5
 274         krb5_error_code rc;
 275         krb5_context ctx;
 276         struct ip_service *kdcs;
 277         const char *realm;
 278         int num_kdcs = 0;
 279         int i;
 280         NTSTATUS status;
 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 = argv[0];
 292         } else if (lp_realm() && *lp_realm()) {
 293                 realm = lp_realm();
 294         } else {
 295                 char **realms;
 296
 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 = (const char *) *realms;
 304         }
 305
 306         status = get_kdc_list(realm, NULL, &kdcs, &num_kdcs);
 307         if (!NT_STATUS_IS_OK(status)) {
 308                 DEBUG(1,("get_kdc_list failed (%s)\n", nt_errstr(status)));
 309                 return -1;
 310         }
 311
 312         for (i = 0; i < num_kdcs; i++) {
 313                 char addr[INET6_ADDRSTRLEN];
 314
 315                 print_sockaddr(addr, sizeof(addr), &kdcs[i].ss);
 316
 317                 d_printf("%s:%u\n", addr, kdcs[i].port);
 318         }
 319
 320         return 0;
 321 #endif
 322         DEBUG(1, ("No kerberos support\n"));
 323         return -1;
 324 }
 325
 326 static int net_lookup_name(struct net_context *c, int argc, const char **argv)
 327 {
 328         const char *dom, *name;
 329         struct dom_sid sid;
 330         enum lsa_SidType type;
 331
 332         if (argc != 1) {
 333                 d_printf("%s\n%s",
 334                          _("Usage:"),
 335                          _(" net lookup name <name>\n"));
 336                 return -1;
 337         }
 338
 339         if (!lookup_name(talloc_tos(), argv[0], LOOKUP_NAME_ALL,
 340                          &dom, &name, &sid, &type)) {
 341                 d_printf(_("Could not lookup name %s\n"), argv[0]);
 342                 return -1;
 343         }
 344
 345         d_printf("%s %d (%s) %s\\%s\n", sid_string_tos(&sid),
 346                  type, sid_type_lookup(type), dom, name);
 347         return 0;
 348 }
 349
 350 static int net_lookup_sid(struct net_context *c, int argc, const char **argv)
 351 {
 352         const char *dom, *name;
 353         struct dom_sid sid;
 354         enum lsa_SidType type;
 355
 356         if (argc != 1) {
 357                 d_printf("%s\n%s",
 358                          _("Usage:"),
 359                          _(" net lookup sid <sid>\n"));
 360                 return -1;
 361         }
 362
 363         if (!string_to_sid(&sid, argv[0])) {
 364                 d_printf(_("Could not convert %s to SID\n"), argv[0]);
 365                 return -1;
 366         }
 367
 368         if (!lookup_sid(talloc_tos(), &sid,
 369                         &dom, &name, &type)) {
 370                 d_printf(_("Could not lookup name %s\n"), argv[0]);
 371                 return -1;
 372         }
 373
 374         d_printf("%s %d (%s) %s\\%s\n", sid_string_tos(&sid),
 375                  type, sid_type_lookup(type), dom, name);
 376         return 0;
 377 }
 378
 379 static int net_lookup_dsgetdcname(struct net_context *c, int argc, const char **argv)
 380 {
 381         NTSTATUS status;
 382         const char *domain_name = NULL;
 383         const char *site_name = NULL;
 384         uint32_t flags = 0;
 385         struct netr_DsRGetDCNameInfo *info = NULL;
 386         TALLOC_CTX *mem_ctx;
 387         char *s = NULL;
 388
 389         if (argc < 1 || argc > 3) {
 390                 d_printf("%s\n%s",
 391                          _("Usage:"),
 392                          _(" net lookup dsgetdcname "
 393                            "<name> <flags> <sitename>\n"));
 394                 return -1;
 395         }
 396
 397         mem_ctx = talloc_init("net_lookup_dsgetdcname");
 398         if (!mem_ctx) {
 399                 return -1;
 400         }
 401
 402         domain_name = argv[0];
 403
 404         if (argc >= 2)
 405                 sscanf(argv[1], "%x", &flags);
 406
 407         if (!flags) {
 408                 flags |= DS_DIRECTORY_SERVICE_REQUIRED;
 409         }
 410
 411         if (argc == 3) {
 412                 site_name = argv[2];
 413         }
 414
 415         if (!c->msg_ctx) {
 416                 d_fprintf(stderr, _("Could not initialise message context. "
 417                         "Try running as root\n"));
 418                 return -1;
 419         }
 420
 421         status = dsgetdcname(mem_ctx, c->msg_ctx, domain_name, NULL, site_name,
 422                              flags, &info);
 423         if (!NT_STATUS_IS_OK(status)) {
 424                 d_printf(_("failed with: %s\n"), nt_errstr(status));
 425                 TALLOC_FREE(mem_ctx);
 426                 return -1;
 427         }
 428
 429         s = NDR_PRINT_STRUCT_STRING(mem_ctx, netr_DsRGetDCNameInfo, info);
 430         printf("%s\n", s);
 431         TALLOC_FREE(s);
 432
 433         TALLOC_FREE(mem_ctx);
 434         return 0;
 435 }
 436
 437
 438 /* lookup hosts or IP addresses using internal samba lookup fns */
 439 int net_lookup(struct net_context *c, int argc, const char **argv)
 440 {
 441         int i;
 442
 443         struct functable table[] = {
 444                 {"HOST", net_lookup_host},
 445                 {"LDAP", net_lookup_ldap},
 446                 {"DC", net_lookup_dc},
 447                 {"PDC", net_lookup_pdc},
 448                 {"MASTER", net_lookup_master},
 449                 {"KDC", net_lookup_kdc},
 450                 {"NAME", net_lookup_name},
 451                 {"SID", net_lookup_sid},
 452                 {"DSGETDCNAME", net_lookup_dsgetdcname},
 453                 {NULL, NULL}
 454         };
 455
 456         if (argc < 1) {
 457                 d_printf(_("\nUsage: \n"));
 458                 return net_lookup_usage(c, argc, argv);
 459         }
 460         for (i=0; table[i].funcname; i++) {
 461                 if (strcasecmp_m(argv[0], table[i].funcname) == 0)
 462                         return table[i].fn(c, argc-1, argv+1);
 463         }
 464
 465         /* Default to lookup a hostname so 'net lookup foo#1b' can be
 466            used instead of 'net lookup host foo#1b'.  The host syntax
 467            is a bit confusing as non #00 names can't really be
 468            considered hosts as such. */
 469
 470         return net_lookup_host(c, argc, argv);
 471 }