source3/libads/cldap.c

   1 /*
   2    Samba Unix/Linux SMB client library
   3    net ads cldap functions
   4    Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
   5    Copyright (C) 2003 Jim McDonough (jmcd@us.ibm.com)
   6    Copyright (C) 2008 Guenther Deschner (gd@samba.org)
   7    Copyright (C) 2009 Stefan Metzmacher (metze@samba.org)
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "../libcli/cldap/cldap.h"
  25 #include "../lib/tsocket/tsocket.h"
  26 #include "../lib/util/tevent_ntstatus.h"
  27 #include "libads/cldap.h"
  28
  29 struct cldap_multi_netlogon_state {
  30         struct tevent_context *ev;
  31         const struct tsocket_address * const *servers;
  32         int num_servers;
  33         const char *domain;
  34         const char *hostname;
  35         unsigned ntversion;
  36         int min_servers;
  37
  38         struct cldap_socket **cldap;
  39         struct tevent_req **subreqs;
  40         int num_sent;
  41         int num_received;
  42         int num_good_received;
  43         struct cldap_netlogon *ios;
  44         struct netlogon_samlogon_response **responses;
  45 };
  46
  47 static void cldap_multi_netlogon_done(struct tevent_req *subreq);
  48 static void cldap_multi_netlogon_next(struct tevent_req *subreq);
  49
  50 /*
  51  * Do a parallel cldap ping to the servers. The first "min_servers"
  52  * are fired directly, the remaining ones in 100msec intervals. If
  53  * "min_servers" responses came in successfully, we immediately reply,
  54  * not waiting for the remaining ones.
  55  */
  56
  57 struct tevent_req *cldap_multi_netlogon_send(
  58         TALLOC_CTX *mem_ctx, struct tevent_context *ev,
  59         const struct tsocket_address * const *servers, int num_servers,
  60         const char *domain, const char *hostname, unsigned ntversion,
  61         int min_servers)
  62 {
  63         struct tevent_req *req, *subreq;
  64         struct cldap_multi_netlogon_state *state;
  65         int i;
  66
  67         req = tevent_req_create(mem_ctx, &state,
  68                                 struct cldap_multi_netlogon_state);
  69         if (req == NULL) {
  70                 return NULL;
  71         }
  72         state->ev = ev;
  73         state->servers = servers;
  74         state->num_servers = num_servers;
  75         state->domain = domain;
  76         state->hostname = hostname;
  77         state->ntversion = ntversion;
  78         state->min_servers = min_servers;
  79
  80         if (min_servers > num_servers) {
  81                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  82                 return tevent_req_post(req, ev);
  83         }
  84
  85         state->subreqs = talloc_zero_array(state,
  86                                            struct tevent_req *,
  87                                            num_servers);
  88         if (tevent_req_nomem(state->subreqs, req)) {
  89                 return tevent_req_post(req, ev);
  90         }
  91
  92         state->cldap = talloc_zero_array(state,
  93                                          struct cldap_socket *,
  94                                          num_servers);
  95         if (tevent_req_nomem(state->cldap, req)) {
  96                 return tevent_req_post(req, ev);
  97         }
  98
  99         state->responses = talloc_zero_array(state,
 100                                 struct netlogon_samlogon_response *,
 101                                 num_servers);
 102         if (tevent_req_nomem(state->responses, req)) {
 103                 return tevent_req_post(req, ev);
 104         }
 105
 106         state->ios = talloc_zero_array(state->responses,
 107                                        struct cldap_netlogon,
 108                                        num_servers);
 109         if (tevent_req_nomem(state->ios, req)) {
 110                 return tevent_req_post(req, ev);
 111         }
 112
 113         for (i=0; i<num_servers; i++) {
 114                 NTSTATUS status;
 115
 116                 status = cldap_socket_init(state->cldap,
 117                                            NULL, /* local_addr */
 118                                            state->servers[i],
 119                                            &state->cldap[i]);
 120                 if (tevent_req_nterror(req, status)) {
 121                         return tevent_req_post(req, ev);
 122                 }
 123
 124                 state->ios[i].in.dest_address   = NULL;
 125                 state->ios[i].in.dest_port      = 0;
 126                 state->ios[i].in.realm          = domain;
 127                 state->ios[i].in.host           = NULL;
 128                 state->ios[i].in.user           = NULL;
 129                 state->ios[i].in.domain_guid    = NULL;
 130                 state->ios[i].in.domain_sid     = NULL;
 131                 state->ios[i].in.acct_control   = 0;
 132                 state->ios[i].in.version        = ntversion;
 133                 state->ios[i].in.map_response   = false;
 134         }
 135
 136         for (i=0; i<min_servers; i++) {
 137                 state->subreqs[i] = cldap_netlogon_send(state->subreqs,
 138                                                         state->ev,
 139                                                         state->cldap[i],
 140                                                         &state->ios[i]);
 141                 if (tevent_req_nomem(state->subreqs[i], req)) {
 142                         return tevent_req_post(req, ev);
 143                 }
 144                 tevent_req_set_callback(
 145                         state->subreqs[i], cldap_multi_netlogon_done, req);
 146         }
 147         state->num_sent = min_servers;
 148
 149         if (state->num_sent < state->num_servers) {
 150                 /*
 151                  * After 100 milliseconds fire the next one
 152                  */
 153                 subreq = tevent_wakeup_send(state, state->ev,
 154                                             timeval_current_ofs(0, 100000));
 155                 if (tevent_req_nomem(subreq, req)) {
 156                         return tevent_req_post(req, ev);
 157                 }
 158                 tevent_req_set_callback(subreq, cldap_multi_netlogon_next,
 159                                         req);
 160         }
 161
 162         return req;
 163 }
 164
 165 static void cldap_multi_netlogon_done(struct tevent_req *subreq)
 166 {
 167         struct tevent_req *req = tevent_req_callback_data(
 168                 subreq, struct tevent_req);
 169         struct cldap_multi_netlogon_state *state = tevent_req_data(
 170                 req, struct cldap_multi_netlogon_state);
 171         NTSTATUS status;
 172         struct netlogon_samlogon_response *response;
 173         int i;
 174
 175         for (i=0; i<state->num_sent; i++) {
 176                 if (state->subreqs[i] == subreq) {
 177                         break;
 178                 }
 179         }
 180         if (i == state->num_sent) {
 181                 /*
 182                  * Got a response we did not fire...
 183                  */
 184                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 185                 return;
 186         }
 187         state->subreqs[i] = NULL;
 188
 189         response = talloc_zero(state, struct netlogon_samlogon_response);
 190         if (tevent_req_nomem(response, req)) {
 191                 return;
 192         }
 193
 194         status = cldap_netlogon_recv(subreq, response,
 195                                      &state->ios[i]);
 196         TALLOC_FREE(subreq);
 197         state->num_received += 1;
 198
 199         if (NT_STATUS_IS_OK(status)) {
 200                 *response = state->ios[i].out.netlogon;
 201                 state->responses[i] = talloc_move(state->responses,
 202                                                   &response);
 203                 state->num_good_received += 1;
 204         }
 205
 206         if ((state->num_received == state->num_servers) ||
 207             (state->num_good_received >= state->min_servers)) {
 208                 tevent_req_done(req);
 209                 return;
 210         }
 211 }
 212
 213 static void cldap_multi_netlogon_next(struct tevent_req *subreq)
 214 {
 215         struct tevent_req *req = tevent_req_callback_data(
 216                 subreq, struct tevent_req);
 217         struct cldap_multi_netlogon_state *state = tevent_req_data(
 218                 req, struct cldap_multi_netlogon_state);
 219         bool ret;
 220
 221         ret = tevent_wakeup_recv(subreq);
 222         TALLOC_FREE(subreq);
 223         if (!ret) {
 224                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 225                 return;
 226         }
 227
 228         subreq = cldap_netlogon_send(state->subreqs,
 229                                      state->ev,
 230                                      state->cldap[state->num_sent],
 231                                      &state->ios[state->num_sent]);
 232         if (tevent_req_nomem(subreq, req)) {
 233                 return;
 234         }
 235         tevent_req_set_callback(subreq, cldap_multi_netlogon_done, req);
 236         state->subreqs[state->num_sent] = subreq;
 237         state->num_sent += 1;
 238
 239         if (state->num_sent < state->num_servers) {
 240                 /*
 241                  * After 100 milliseconds fire the next one
 242                  */
 243                 subreq = tevent_wakeup_send(state, state->ev,
 244                                             timeval_current_ofs(0, 100000));
 245                 if (tevent_req_nomem(subreq, req)) {
 246                         return;
 247                 }
 248                 tevent_req_set_callback(subreq, cldap_multi_netlogon_next,
 249                                         req);
 250         }
 251 }
 252
 253 NTSTATUS cldap_multi_netlogon_recv(
 254         struct tevent_req *req, TALLOC_CTX *mem_ctx,
 255         struct netlogon_samlogon_response ***responses)
 256 {
 257         struct cldap_multi_netlogon_state *state = tevent_req_data(
 258                 req, struct cldap_multi_netlogon_state);
 259         NTSTATUS status;
 260
 261         if (tevent_req_is_nterror(req, &status) &&
 262             !NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
 263                 return status;
 264         }
 265         /*
 266          * If we timeout, give back what we have so far
 267          */
 268         *responses = talloc_move(mem_ctx, &state->responses);
 269         return NT_STATUS_OK;
 270 }
 271
 272 NTSTATUS cldap_multi_netlogon(
 273         TALLOC_CTX *mem_ctx,
 274         const struct tsocket_address * const *servers,
 275         int num_servers,
 276         const char *domain, const char *hostname, unsigned ntversion,
 277         int min_servers, struct timeval timeout,
 278         struct netlogon_samlogon_response ***responses)
 279 {
 280         struct tevent_context *ev;
 281         struct tevent_req *req;
 282         NTSTATUS status = NT_STATUS_NO_MEMORY;
 283
 284         ev = tevent_context_init(talloc_tos());
 285         if (ev == NULL) {
 286                 goto fail;
 287         }
 288         req = cldap_multi_netlogon_send(
 289                 ev, ev, servers, num_servers, domain, hostname, ntversion,
 290                 min_servers);
 291         if (req == NULL) {
 292                 goto fail;
 293         }
 294         if (!tevent_req_set_endtime(req, ev, timeout)) {
 295                 goto fail;
 296         }
 297         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 298                 goto fail;
 299         }
 300         status = cldap_multi_netlogon_recv(req, mem_ctx, responses);
 301 fail:
 302         TALLOC_FREE(ev);
 303         return status;
 304 }
 305
 306 /*******************************************************************
 307   do a cldap netlogon query.  Always 389/udp
 308 *******************************************************************/
 309
 310 bool ads_cldap_netlogon(TALLOC_CTX *mem_ctx,
 311                         struct sockaddr_storage *ss,
 312                         const char *realm,
 313                         uint32_t nt_version,
 314                         struct netlogon_samlogon_response **_reply)
 315 {
 316         NTSTATUS status;
 317         char addrstr[INET6_ADDRSTRLEN];
 318         const char *dest_str;
 319         struct tsocket_address *dest_addr;
 320         const struct tsocket_address * const *dest_addrs;
 321         struct netlogon_samlogon_response **responses = NULL;
 322         int ret;
 323
 324         dest_str = print_sockaddr(addrstr, sizeof(addrstr), ss);
 325
 326         ret = tsocket_address_inet_from_strings(mem_ctx, "ip",
 327                                                 dest_str, LDAP_PORT,
 328                                                 &dest_addr);
 329         if (ret != 0) {
 330                 status = map_nt_error_from_unix(errno);
 331                 DEBUG(2,("Failed to create cldap tsocket_address for %s - %s\n",
 332                          dest_str, nt_errstr(status)));
 333                 return false;
 334         }
 335
 336         dest_addrs = (const struct tsocket_address * const *)&dest_addr;
 337
 338         status = cldap_multi_netlogon(talloc_tos(),
 339                                 dest_addrs, 1,
 340                                 realm, NULL,
 341                                 nt_version, 1,
 342                                 timeval_current_ofs(MAX(3,lp_ldap_timeout()/2), 0),
 343                                 &responses);
 344         if (!NT_STATUS_IS_OK(status)) {
 345                 DEBUG(2, ("ads_cldap_netlogon: cldap_multi_netlogon "
 346                           "failed: %s\n", nt_errstr(status)));
 347                 return false;
 348         }
 349         if (responses[0] == NULL) {
 350                 DEBUG(2, ("ads_cldap_netlogon: did not get a reply\n"));
 351                 TALLOC_FREE(responses);
 352                 return false;
 353         }
 354         *_reply = talloc_move(mem_ctx, &responses[0]);
 355
 356         return true;
 357 }
 358
 359 /*******************************************************************
 360   do a cldap netlogon query.  Always 389/udp
 361 *******************************************************************/
 362
 363 bool ads_cldap_netlogon_5(TALLOC_CTX *mem_ctx,
 364                           struct sockaddr_storage *ss,
 365                           const char *realm,
 366                           struct NETLOGON_SAM_LOGON_RESPONSE_EX *reply5)
 367 {
 368         uint32_t nt_version = NETLOGON_NT_VERSION_5 | NETLOGON_NT_VERSION_5EX;
 369         struct netlogon_samlogon_response *reply = NULL;
 370         bool ret;
 371
 372         ret = ads_cldap_netlogon(mem_ctx, ss, realm, nt_version, &reply);
 373         if (!ret) {
 374                 return false;
 375         }
 376
 377         if (reply->ntver != NETLOGON_NT_VERSION_5EX) {
 378                 DEBUG(0,("ads_cldap_netlogon_5: nt_version mismatch: 0x%08x\n",
 379                         reply->ntver));
 380                 return false;
 381         }
 382
 383         *reply5 = reply->data.nt5_ex;
 384
 385         return true;
 386 }