source4/winbind/wb_samba3_protocol.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main winbindd samba3 server routines
   4
   5    Copyright (C) Stefan Metzmacher      2005
   6    Copyright (C) Volker Lendecke        2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "winbind/wb_server.h"
  24 #include "smbd/service_stream.h"
  25 #include "lib/stream/packet.h"
  26 #include "lib/tsocket/tsocket.h"
  27
  28 /*
  29   work out if a packet is complete for protocols that use a 32 bit host byte
  30   order length
  31 */
  32 NTSTATUS wbsrv_samba3_packet_full_request(void *private_data, DATA_BLOB blob, size_t *size)
  33 {
  34         uint32_t *len;
  35         struct winbindd_request *req;
  36
  37         if (blob.length < 4) {
  38                 return STATUS_MORE_ENTRIES;
  39         }
  40         len = (uint32_t *)blob.data;
  41         *size = (*len);
  42         if (*size > blob.length) {
  43                 return STATUS_MORE_ENTRIES;
  44         }
  45         if (*size < sizeof(req)) {
  46                 /* its not a valid winbind packet. We need to accept
  47                    it here, and wbsrv_samba3_pull_request() will throw
  48                    it away */
  49                 return NT_STATUS_OK;
  50         }
  51
  52         /* now we need to cope with possible extra_data, which is
  53            stuck on the end with no length prefix! This is a very very
  54            stupid protocol */
  55         req = (struct winbindd_request *)blob.data;
  56         *size = (*len) + req->extra_len;
  57         if (*size > blob.length) {
  58                 return STATUS_MORE_ENTRIES;
  59         }
  60         return NT_STATUS_OK;
  61 }
  62
  63
  64 NTSTATUS wbsrv_samba3_pull_request(struct wbsrv_samba3_call *call)
  65 {
  66         if (call->in.length < sizeof(*call->request)) {
  67                 DEBUG(0,("wbsrv_samba3_pull_request: invalid blob length %lu should be %lu\n"
  68                          " make sure you use the correct winbind client tools!\n",
  69                          (long)call->in.length, (long)sizeof(*call->request)));
  70                 return NT_STATUS_INVALID_PARAMETER;
  71         }
  72
  73         call->request = talloc_zero(call, struct winbindd_request);
  74         NT_STATUS_HAVE_NO_MEMORY(call->request);
  75
  76         /* the packet layout is the same as the in memory layout of the request, so just copy it */
  77         memcpy(call->request, call->in.data, sizeof(*call->request));
  78
  79         if (call->in.length != sizeof(*call->request) + call->request->extra_len) {
  80                 DEBUG(0,(__location__ " : invalid extra_len %u should be %u\n",
  81                          call->request->extra_len, (unsigned)(call->in.length - sizeof(*call->request))));
  82                 return NT_STATUS_INVALID_PARAMETER;
  83         }
  84
  85         /* there may be extra data */
  86         if (call->request->extra_len != 0) {
  87                 call->request->extra_data.data = talloc_size(call->request, call->request->extra_len+1);
  88                 NT_STATUS_HAVE_NO_MEMORY(call->request->extra_data.data);
  89                 /* guarantee a nul termination, as many of the uses of
  90                    this field is for strings */
  91                 memcpy(call->request->extra_data.data, call->in.data + sizeof(*call->request),
  92                        call->request->extra_len);
  93                 call->request->extra_data.data[call->request->extra_len] = 0;
  94         } else {
  95                 call->request->extra_data.data = NULL;
  96         }
  97
  98         return NT_STATUS_OK;
  99 }
 100
 101 NTSTATUS wbsrv_samba3_handle_call(struct wbsrv_samba3_call *s3call)
 102 {
 103         DEBUG(10, ("Got winbind samba3 request %d\n", s3call->request->cmd));
 104
 105         s3call->response = talloc_zero(s3call, struct winbindd_response);
 106         NT_STATUS_HAVE_NO_MEMORY(s3call->request);
 107
 108         s3call->response->length = sizeof(*s3call->response);
 109
 110         switch(s3call->request->cmd) {
 111         case WINBINDD_INTERFACE_VERSION:
 112                 return wbsrv_samba3_interface_version(s3call);
 113
 114         case WINBINDD_CHECK_MACHACC:
 115                 return wbsrv_samba3_check_machacc(s3call);
 116
 117         case WINBINDD_PING:
 118                 return wbsrv_samba3_ping(s3call);
 119
 120         case WINBINDD_INFO:
 121                 return wbsrv_samba3_info(s3call);
 122
 123         case WINBINDD_DOMAIN_NAME:
 124                 return wbsrv_samba3_domain_name(s3call);
 125
 126         case WINBINDD_NETBIOS_NAME:
 127                 return wbsrv_samba3_netbios_name(s3call);
 128
 129         case WINBINDD_PRIV_PIPE_DIR:
 130                 return wbsrv_samba3_priv_pipe_dir(s3call);
 131
 132         case WINBINDD_LOOKUPNAME:
 133                 return wbsrv_samba3_lookupname(s3call);
 134
 135         case WINBINDD_LOOKUPSID:
 136                 return wbsrv_samba3_lookupsid(s3call);
 137
 138         case WINBINDD_PAM_AUTH:
 139                 return wbsrv_samba3_pam_auth(s3call);
 140
 141         case WINBINDD_PAM_AUTH_CRAP:
 142                 return wbsrv_samba3_pam_auth_crap(s3call);
 143
 144         case WINBINDD_GETDCNAME:
 145                 return wbsrv_samba3_getdcname(s3call);
 146
 147         case WINBINDD_GETUSERDOMGROUPS:
 148                 return wbsrv_samba3_userdomgroups(s3call);
 149
 150         case WINBINDD_GETUSERSIDS:
 151                 return wbsrv_samba3_usersids(s3call);
 152
 153         case WINBINDD_LIST_GROUPS:
 154                 return wbsrv_samba3_list_groups(s3call);
 155
 156         case WINBINDD_LIST_TRUSTDOM:
 157                 return wbsrv_samba3_list_trustdom(s3call);
 158
 159         case WINBINDD_LIST_USERS:
 160                 return wbsrv_samba3_list_users(s3call);
 161
 162         case WINBINDD_GETPWNAM:
 163                 return wbsrv_samba3_getpwnam(s3call);
 164
 165         case WINBINDD_GETPWUID:
 166                 return wbsrv_samba3_getpwuid(s3call);
 167
 168         case WINBINDD_SETPWENT:
 169                 return wbsrv_samba3_setpwent(s3call);
 170
 171         case WINBINDD_GETPWENT:
 172                 return wbsrv_samba3_getpwent(s3call);
 173
 174         case WINBINDD_ENDPWENT:
 175                 return wbsrv_samba3_endpwent(s3call);
 176
 177         case WINBINDD_GETGRNAM:
 178                 return wbsrv_samba3_getgrnam(s3call);
 179
 180         case WINBINDD_GETGRGID:
 181                 return wbsrv_samba3_getgrgid(s3call);
 182
 183         case WINBINDD_GETGROUPS:
 184                 return wbsrv_samba3_getgroups(s3call);
 185
 186         case WINBINDD_SETGRENT:
 187                 return wbsrv_samba3_setgrent(s3call);
 188
 189         case WINBINDD_GETGRENT:
 190                 return wbsrv_samba3_getgrent(s3call);
 191
 192         case WINBINDD_ENDGRENT:
 193                 return wbsrv_samba3_endgrent(s3call);
 194
 195         case WINBINDD_SID_TO_UID:
 196         case WINBINDD_DUAL_SID2UID:
 197                 return wbsrv_samba3_sid2uid(s3call);
 198
 199         case WINBINDD_SID_TO_GID:
 200         case WINBINDD_DUAL_SID2GID:
 201                 return wbsrv_samba3_sid2gid(s3call);
 202
 203         case WINBINDD_UID_TO_SID:
 204         case WINBINDD_DUAL_UID2SID:
 205                 return wbsrv_samba3_uid2sid(s3call);
 206
 207         case WINBINDD_GID_TO_SID:
 208         case WINBINDD_DUAL_GID2SID:
 209                 return wbsrv_samba3_gid2sid(s3call);
 210
 211         case WINBINDD_DOMAIN_INFO:
 212                 return wbsrv_samba3_domain_info(s3call);
 213
 214         case WINBINDD_PAM_LOGOFF:
 215                 return wbsrv_samba3_pam_logoff(s3call);
 216
 217         case WINBINDD_SIDS_TO_XIDS:
 218                 return wbsrv_samba3_sids2xids(s3call);
 219
 220         /* Unimplemented commands */
 221         case WINBINDD_GETPWSID:
 222         case WINBINDD_PAM_CHAUTHTOK:
 223         case WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP:
 224         case WINBINDD_LOOKUPRIDS:
 225         case WINBINDD_LOOKUPSIDS:
 226         case WINBINDD_ALLOCATE_UID:
 227         case WINBINDD_ALLOCATE_GID:
 228         case WINBINDD_SHOW_SEQUENCE:
 229         case WINBINDD_WINS_BYIP:
 230         case WINBINDD_WINS_BYNAME:
 231         case WINBINDD_GETGRLST:
 232         case WINBINDD_GETSIDALIASES:
 233         case WINBINDD_DSGETDCNAME:
 234         case WINBINDD_INIT_CONNECTION:
 235         case WINBINDD_DUAL_SIDS2XIDS:
 236         case WINBINDD_DUAL_USERINFO:
 237         case WINBINDD_DUAL_GETSIDALIASES:
 238         case WINBINDD_DUAL_NDRCMD:
 239         case WINBINDD_CCACHE_NTLMAUTH:
 240         case WINBINDD_NUM_CMDS:
 241         case WINBINDD_CHANGE_MACHACC:
 242         case WINBINDD_PING_DC:
 243         case WINBINDD_DC_INFO:
 244         case WINBINDD_CCACHE_SAVE:
 245                 DEBUG(10, ("Unimplemented winbind samba3 request %d\n",
 246                            s3call->request->cmd));
 247                 break;
 248         }
 249
 250         s3call->response->result = WINBINDD_ERROR;
 251         return NT_STATUS_OK;
 252 }
 253
 254 static NTSTATUS wbsrv_samba3_push_reply(struct wbsrv_samba3_call *call)
 255 {
 256         uint8_t *extra_data;
 257         size_t extra_data_len = 0;
 258
 259         extra_data = (uint8_t *)call->response->extra_data.data;
 260         if (extra_data != NULL) {
 261                 extra_data_len = call->response->length -
 262                         sizeof(*call->response);
 263         }
 264
 265         call->out = data_blob_talloc(call, NULL, call->response->length);
 266         NT_STATUS_HAVE_NO_MEMORY(call->out.data);
 267
 268         /* don't push real pointer values into sockets */
 269         if (extra_data) {
 270                 call->response->extra_data.data = (void *)0xFFFFFFFF;
 271         }
 272
 273         memcpy(call->out.data, call->response, sizeof(*call->response));
 274         /* set back the pointer */
 275         call->response->extra_data.data = extra_data;
 276
 277         if (extra_data) {
 278                 memcpy(call->out.data + sizeof(*call->response),
 279                        extra_data,
 280                        extra_data_len);
 281         }
 282
 283         return NT_STATUS_OK;
 284 }
 285
 286 static void wbsrv_samba3_send_reply_done(struct tevent_req *subreq);
 287
 288 /*
 289  * queue a wbsrv_call reply on a wbsrv_connection
 290  * NOTE: that this implies talloc_free(call),
 291  *       use talloc_reference(call) if you need it after
 292  *       calling wbsrv_queue_reply
 293  */
 294 NTSTATUS wbsrv_samba3_send_reply(struct wbsrv_samba3_call *call)
 295 {
 296         struct wbsrv_connection *wbsrv_conn = call->wbconn;
 297         struct tevent_req *subreq;
 298         NTSTATUS status;
 299
 300         call->wbconn->pending_calls--;
 301
 302         status = wbsrv_samba3_push_reply(call);
 303         NT_STATUS_NOT_OK_RETURN(status);
 304
 305         call->out_iov[0].iov_base = (char *) call->out.data;
 306         call->out_iov[0].iov_len = call->out.length;
 307
 308         subreq = tstream_writev_queue_send(call,
 309                                            wbsrv_conn->conn->event.ctx,
 310                                            wbsrv_conn->tstream,
 311                                            wbsrv_conn->send_queue,
 312                                            call->out_iov, 1);
 313         if (subreq == NULL) {
 314                 wbsrv_terminate_connection(wbsrv_conn, "wbsrv_call_loop: "
 315                                 "no memory for tstream_writev_queue_send");
 316                 return NT_STATUS_NO_MEMORY;
 317         }
 318         tevent_req_set_callback(subreq, wbsrv_samba3_send_reply_done, call);
 319
 320         return status;
 321 }
 322
 323 static void wbsrv_samba3_send_reply_done(struct tevent_req *subreq)
 324 {
 325         struct wbsrv_samba3_call *call = tevent_req_callback_data(subreq,
 326                         struct wbsrv_samba3_call);
 327         int sys_errno;
 328         int rc;
 329
 330         rc = tstream_writev_queue_recv(subreq, &sys_errno);
 331         TALLOC_FREE(subreq);
 332         if (rc == -1) {
 333                 const char *reason;
 334
 335                 reason = talloc_asprintf(call, "wbsrv_samba3_send_reply_done: "
 336                                          "tstream_writev_queue_recv() - %d:%s",
 337                                          sys_errno, strerror(sys_errno));
 338                 if (reason == NULL) {
 339                         reason = "wbsrv_samba3_send_reply_done: "
 340                                  "tstream_writev_queue_recv() failed";
 341                 }
 342
 343                 wbsrv_terminate_connection(call->wbconn, reason);
 344                 return;
 345         }
 346
 347         talloc_free(call);
 348 }
 349
 350 NTSTATUS wbsrv_samba3_process(struct wbsrv_samba3_call *call)
 351 {
 352         NTSTATUS status;
 353
 354         status = wbsrv_samba3_pull_request(call);
 355
 356         if (!NT_STATUS_IS_OK(status)) {
 357                 return status;
 358         }
 359
 360         call->wbconn->pending_calls++;
 361
 362         status = wbsrv_samba3_handle_call(call);
 363
 364         if (!NT_STATUS_IS_OK(status)) {
 365                 call->wbconn->pending_calls--;
 366                 talloc_free(call);
 367                 return status;
 368         }
 369
 370         if (call->flags & WBSRV_CALL_FLAGS_REPLY_ASYNC) {
 371                 return NT_STATUS_OK;
 372         }
 373
 374         status = wbsrv_samba3_send_reply(call);
 375         return status;
 376 }
 377