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 #include "../libcli/security/security.h"
  26
  27 int net_lookup_usage(struct net_context *c, int argc, const char **argv)
  28 {
  29         d_printf(_(
  30 "  net lookup [host] HOSTNAME[#<type>]\n\tgives IP for a hostname\n\n"
  31 "  net lookup ldap [domain]\n\tgives IP of domain's ldap server\n\n"
  32 "  net lookup kdc [realm]\n\tgives IP of realm's kerberos KDC\n\n"
  33 "  net lookup pdc [domain|realm]\n\tgives IP of realm's kerberos KDC\n\n"
  34 "  net lookup dc [domain]\n\tgives IP of domains Domain Controllers\n\n"
  35 "  net lookup master [domain|wg]\n\tgive IP of master browser\n\n"
  36 "  net lookup name [name]\n\tLookup name's sid and type\n\n"
  37 "  net lookup sid [sid]\n\tGive sid's name and type\n\n"
  38 "  net lookup dsgetdcname [name] [flags] [sitename]\n\n"
  39 ));
  40         return -1;
  41 }
  42
  43 /* lookup a hostname giving an IP */
  44 static int net_lookup_host(struct net_context *c, int argc, const char **argv)
  45 {
  46         struct sockaddr_storage ss;
  47         int name_type = 0x20;
  48         char addr[INET6_ADDRSTRLEN];
  49         const char *name = argv[0];
  50         char *p;
  51
  52         if (argc == 0)
  53                 return net_lookup_usage(c, argc, argv);
  54
  55         p = strchr_m(name,'#');
  56         if (p) {
  57                 *p = '\0';
  58                 sscanf(++p,"%x",&name_type);
  59         }
  60
  61         if (!resolve_name(name, &ss, name_type, false)) {
  62                 /* we deliberately use DEBUG() here to send it to stderr
  63                    so scripts aren't mucked up */
  64                 DEBUG(0,("Didn't find %s#%02x\n", name, name_type));
  65                 return -1;
  66         }
  67
  68         print_sockaddr(addr, sizeof(addr), &ss);
  69         d_printf("%s\n", addr);
  70         return 0;
  71 }
  72
  73 #ifdef HAVE_ADS
  74 static void print_ldap_srvlist(struct dns_rr_srv *dclist, int numdcs )
  75 {
  76         struct sockaddr_storage ss;
  77         int i;
  78
  79         for ( i=0; i<numdcs; i++ ) {
  80                 if (resolve_name(dclist[i].hostname, &ss, 0x20, true) ) {
  81                         char addr[INET6_ADDRSTRLEN];
  82                         print_sockaddr(addr, sizeof(addr), &ss);
  83 #ifdef HAVE_IPV6
  84                         if (ss.ss_family == AF_INET6) {
  85                                 d_printf("[%s]:%d\n", addr, dclist[i].port);
  86                         }
  87 #endif
  88                         if (ss.ss_family == AF_INET) {
  89                                 d_printf("%s:%d\n", addr, dclist[i].port);
  90                         }
  91                 }
  92         }
  93 }
  94 #endif
  95
  96 static int net_lookup_ldap(struct net_context *c, int argc, const char **argv)
  97 {
  98 #ifdef HAVE_ADS
  99         const char *domain;
 100         struct sockaddr_storage ss;
 101         struct dns_rr_srv *dcs = NULL;
 102         int numdcs = 0;
 103         char *sitename;
 104         TALLOC_CTX *ctx;
 105         NTSTATUS status;
 106         int ret;
 107         char h_name[MAX_DNS_NAME_LENGTH];
 108
 109         if (argc > 0)
 110                 domain = argv[0];
 111         else
 112                 domain = c->opt_target_workgroup;
 113
 114         sitename = sitename_fetch(domain);
 115
 116         if ( (ctx = talloc_init("net_lookup_ldap")) == NULL ) {
 117                 d_fprintf(stderr,"net_lookup_ldap: talloc_init() %s!\n",
 118                           _("failed"));
 119                 SAFE_FREE(sitename);
 120                 return -1;
 121         }
 122
 123         DEBUG(9, ("Lookup up ldap for domain %s\n", domain));
 124
 125         status = ads_dns_query_dcs( ctx, domain, sitename, &dcs, &numdcs );
 126         if ( NT_STATUS_IS_OK(status) && numdcs ) {
 127                 print_ldap_srvlist(dcs, numdcs);
 128                 TALLOC_FREE( ctx );
 129                 SAFE_FREE(sitename);
 130                 return 0;
 131         }
 132
 133         DEBUG(9, ("Looking up PDC for domain %s\n", domain));
 134         if (!get_pdc_ip(domain, &ss)) {
 135                 TALLOC_FREE( ctx );
 136                 SAFE_FREE(sitename);
 137                 return -1;
 138         }
 139
 140         ret = sys_getnameinfo((struct sockaddr *)&ss,
 141                         sizeof(struct sockaddr_storage),
 142                         h_name, sizeof(h_name),
 143                         NULL, 0,
 144                         NI_NAMEREQD);
 145
 146         if (ret) {
 147                 TALLOC_FREE( ctx );
 148                 SAFE_FREE(sitename);
 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                 SAFE_FREE(sitename);
 157                 return -1;
 158         }
 159         domain++;
 160
 161         DEBUG(9, ("Looking up ldap for domain %s\n", domain));
 162
 163         status = ads_dns_query_dcs( ctx, domain, sitename, &dcs, &numdcs );
 164         if ( NT_STATUS_IS_OK(status) && numdcs ) {
 165                 print_ldap_srvlist(dcs, numdcs);
 166                 TALLOC_FREE( ctx );
 167                 SAFE_FREE(sitename);
 168                 return 0;
 169         }
 170
 171         TALLOC_FREE( ctx );
 172         SAFE_FREE(sitename);
 173
 174         return -1;
 175 #endif
 176         DEBUG(1,("No ADS support\n"));
 177         return -1;
 178 }
 179
 180 static int net_lookup_dc(struct net_context *c, int argc, const char **argv)
 181 {
 182         struct ip_service *ip_list;
 183         struct sockaddr_storage ss;
 184         char *pdc_str = NULL;
 185         const char *domain = NULL;
 186         char *sitename = NULL;
 187         int count, i;
 188         char addr[INET6_ADDRSTRLEN];
 189         bool sec_ads = (lp_security() == SEC_ADS);
 190
 191         if (sec_ads) {
 192                 domain = lp_realm();
 193         } else {
 194                 domain = c->opt_target_workgroup;
 195         }
 196
 197         if (argc > 0)
 198                 domain=argv[0];
 199
 200         /* first get PDC */
 201         if (!get_pdc_ip(domain, &ss))
 202                 return -1;
 203
 204         print_sockaddr(addr, sizeof(addr), &ss);
 205         if (asprintf(&pdc_str, "%s", addr) == -1) {
 206                 return -1;
 207         }
 208         d_printf("%s\n", pdc_str);
 209
 210         sitename = sitename_fetch(domain);
 211         if (!NT_STATUS_IS_OK(get_sorted_dc_list(domain, sitename,
 212                                         &ip_list, &count, sec_ads))) {
 213                 SAFE_FREE(pdc_str);
 214                 SAFE_FREE(sitename);
 215                 return 0;
 216         }
 217         SAFE_FREE(sitename);
 218         for (i=0;i<count;i++) {
 219                 print_sockaddr(addr, sizeof(addr), &ip_list[i].ss);
 220                 if (!strequal(pdc_str, addr))
 221                         d_printf("%s\n", addr);
 222         }
 223         SAFE_FREE(pdc_str);
 224         return 0;
 225 }
 226
 227 static int net_lookup_pdc(struct net_context *c, int argc, const char **argv)
 228 {
 229         struct sockaddr_storage ss;
 230         char *pdc_str = NULL;
 231         const char *domain;
 232         char addr[INET6_ADDRSTRLEN];
 233
 234         if (lp_security() == SEC_ADS) {
 235                 domain = lp_realm();
 236         } else {
 237                 domain = c->opt_target_workgroup;
 238         }
 239
 240         if (argc > 0)
 241                 domain=argv[0];
 242
 243         /* first get PDC */
 244         if (!get_pdc_ip(domain, &ss))
 245                 return -1;
 246
 247         print_sockaddr(addr, sizeof(addr), &ss);
 248         if (asprintf(&pdc_str, "%s", addr) == -1) {
 249                 return -1;
 250         }
 251         d_printf("%s\n", pdc_str);
 252         SAFE_FREE(pdc_str);
 253         return 0;
 254 }
 255
 256
 257 static int net_lookup_master(struct net_context *c, int argc, const char **argv)
 258 {
 259         struct sockaddr_storage master_ss;
 260         const char *domain = c->opt_target_workgroup;
 261         char addr[INET6_ADDRSTRLEN];
 262
 263         if (argc > 0)
 264                 domain=argv[0];
 265
 266         if (!find_master_ip(domain, &master_ss))
 267                 return -1;
 268         print_sockaddr(addr, sizeof(addr), &master_ss);
 269         d_printf("%s\n", addr);
 270         return 0;
 271 }
 272
 273 static int net_lookup_kdc(struct net_context *c, int argc, const char **argv)
 274 {
 275 #ifdef HAVE_KRB5
 276         krb5_error_code rc;
 277         krb5_context ctx;
 278         struct sockaddr_in *addrs;
 279         int num_kdcs,i;
 280         krb5_data realm;
 281         char **realms;
 282
 283         initialize_krb5_error_table();
 284         rc = krb5_init_context(&ctx);
 285         if (rc) {
 286                 DEBUG(1,("krb5_init_context failed (%s)\n",
 287                          error_message(rc)));
 288                 return -1;
 289         }
 290
 291         if (argc>0) {
 292                 realm.data = CONST_DISCARD(char *, argv[0]);
 293                 realm.length = strlen(argv[0]);
 294         } else if (lp_realm() && *lp_realm()) {
 295                 realm.data = lp_realm();
 296                 realm.length = strlen((const char *)realm.data);
 297         } else {
 298                 rc = krb5_get_host_realm(ctx, NULL, &realms);
 299                 if (rc) {
 300                         DEBUG(1,("krb5_gethost_realm failed (%s)\n",
 301                                  error_message(rc)));
 302                         return -1;
 303                 }
 304                 realm.data = (char *) *realms;
 305                 realm.length = strlen((const char *)realm.data);
 306         }
 307
 308         rc = smb_krb5_locate_kdc(ctx, &realm, (struct sockaddr **)(void *)&addrs, &num_kdcs, 0);
 309         if (rc) {
 310                 DEBUG(1, ("smb_krb5_locate_kdc failed (%s)\n", error_message(rc)));
 311                 return -1;
 312         }
 313         for (i=0;i<num_kdcs;i++)
 314                 if (addrs[i].sin_family == AF_INET)
 315                         d_printf("%s:%hd\n", inet_ntoa(addrs[i].sin_addr),
 316                                  ntohs(addrs[i].sin_port));
 317         return 0;
 318
 319 #endif
 320         DEBUG(1, ("No kerberos support\n"));
 321         return -1;
 322 }
 323
 324 static int net_lookup_name(struct net_context *c, int argc, const char **argv)
 325 {
 326         const char *dom, *name;
 327         struct dom_sid sid;
 328         enum lsa_SidType type;
 329
 330         if (argc != 1) {
 331                 d_printf("%s\n%s",
 332                          _("Usage:"),
 333                          _(" net lookup name <name>\n"));
 334                 return -1;
 335         }
 336
 337         if (!lookup_name(talloc_tos(), argv[0], LOOKUP_NAME_ALL,
 338                          &dom, &name, &sid, &type)) {
 339                 d_printf(_("Could not lookup name %s\n"), argv[0]);
 340                 return -1;
 341         }
 342
 343         d_printf("%s %d (%s) %s\\%s\n", sid_string_tos(&sid),
 344                  type, sid_type_lookup(type), dom, name);
 345         return 0;
 346 }
 347
 348 static int net_lookup_sid(struct net_context *c, int argc, const char **argv)
 349 {
 350         const char *dom, *name;
 351         struct dom_sid sid;
 352         enum lsa_SidType type;
 353
 354         if (argc != 1) {
 355                 d_printf("%s\n%s",
 356                          _("Usage:"),
 357                          _(" net lookup sid <sid>\n"));
 358                 return -1;
 359         }
 360
 361         if (!string_to_sid(&sid, argv[0])) {
 362                 d_printf(_("Could not convert %s to SID\n"), argv[0]);
 363                 return -1;
 364         }
 365
 366         if (!lookup_sid(talloc_tos(), &sid,
 367                         &dom, &name, &type)) {
 368                 d_printf(_("Could not lookup name %s\n"), argv[0]);
 369                 return -1;
 370         }
 371
 372         d_printf("%s %d (%s) %s\\%s\n", sid_string_tos(&sid),
 373                  type, sid_type_lookup(type), dom, name);
 374         return 0;
 375 }
 376
 377 static int net_lookup_dsgetdcname(struct net_context *c, int argc, const char **argv)
 378 {
 379         NTSTATUS status;
 380         const char *domain_name = NULL;
 381         const char *site_name = NULL;
 382         uint32_t flags = 0;
 383         struct netr_DsRGetDCNameInfo *info = NULL;
 384         TALLOC_CTX *mem_ctx;
 385         char *s = NULL;
 386
 387         if (argc < 1 || argc > 3) {
 388                 d_printf("%s\n%s",
 389                          _("Usage:"),
 390                          _(" net lookup dsgetdcname "
 391                            "<name> <flags> <sitename>\n"));
 392                 return -1;
 393         }
 394
 395         mem_ctx = talloc_init("net_lookup_dsgetdcname");
 396         if (!mem_ctx) {
 397                 return -1;
 398         }
 399
 400         domain_name = argv[0];
 401
 402         if (argc >= 2)
 403                 sscanf(argv[1], "%x", &flags);
 404
 405         if (!flags) {
 406                 flags |= DS_DIRECTORY_SERVICE_REQUIRED;
 407         }
 408
 409         if (argc == 3) {
 410                 site_name = argv[2];
 411         }
 412
 413         if (!c->msg_ctx) {
 414                 d_fprintf(stderr, _("Could not initialise message context. "
 415                         "Try running as root\n"));
 416                 return -1;
 417         }
 418
 419         status = dsgetdcname(mem_ctx, c->msg_ctx, domain_name, NULL, site_name,
 420                              flags, &info);
 421         if (!NT_STATUS_IS_OK(status)) {
 422                 d_printf(_("failed with: %s\n"), nt_errstr(status));
 423                 TALLOC_FREE(mem_ctx);
 424                 return -1;
 425         }
 426
 427         s = NDR_PRINT_STRUCT_STRING(mem_ctx, netr_DsRGetDCNameInfo, info);
 428         printf("%s\n", s);
 429         TALLOC_FREE(s);
 430
 431         TALLOC_FREE(mem_ctx);
 432         return 0;
 433 }
 434
 435
 436 /* lookup hosts or IP addresses using internal samba lookup fns */
 437 int net_lookup(struct net_context *c, int argc, const char **argv)
 438 {
 439         int i;
 440
 441         struct functable table[] = {
 442                 {"HOST", net_lookup_host},
 443                 {"LDAP", net_lookup_ldap},
 444                 {"DC", net_lookup_dc},
 445                 {"PDC", net_lookup_pdc},
 446                 {"MASTER", net_lookup_master},
 447                 {"KDC", net_lookup_kdc},
 448                 {"NAME", net_lookup_name},
 449                 {"SID", net_lookup_sid},
 450                 {"DSGETDCNAME", net_lookup_dsgetdcname},
 451                 {NULL, NULL}
 452         };
 453
 454         if (argc < 1) {
 455                 d_printf(_("\nUsage: \n"));
 456                 return net_lookup_usage(c, argc, argv);
 457         }
 458         for (i=0; table[i].funcname; i++) {
 459                 if (StrCaseCmp(argv[0], table[i].funcname) == 0)
 460                         return table[i].fn(c, argc-1, argv+1);
 461         }
 462
 463         /* Default to lookup a hostname so 'net lookup foo#1b' can be
 464            used instead of 'net lookup host foo#1b'.  The host syntax
 465            is a bit confusing as non #00 names can't really be
 466            considered hosts as such. */
 467
 468         return net_lookup_host(c, argc, argv);
 469 }