source3/smbd/smb2_getinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "smbd/globals.h"
  23 #include "../source4/libcli/smb2/smb2_constants.h"
  24
  25 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
  26                                                  struct tevent_context *ev,
  27                                                  struct smbd_smb2_request *smb2req,
  28                                                  uint8_t in_info_type,
  29                                                  uint8_t in_file_info_class,
  30                                                  uint32_t in_output_buffer_length,
  31                                                  DATA_BLOB in_input_buffer,
  32                                                  uint32_t in_additional_information,
  33                                                  uint32_t in_flags,
  34                                                  uint64_t in_file_id_volatile);
  35 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
  36                                        TALLOC_CTX *mem_ctx,
  37                                        DATA_BLOB *out_output_buffer);
  38
  39 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq);
  40 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req)
  41 {
  42         const uint8_t *inhdr;
  43         const uint8_t *inbody;
  44         int i = req->current_idx;
  45         size_t expected_body_size = 0x29;
  46         size_t body_size;
  47         uint8_t in_info_type;
  48         uint8_t in_file_info_class;
  49         uint32_t in_output_buffer_length;
  50         uint16_t in_input_buffer_offset;
  51         uint32_t in_input_buffer_length;
  52         DATA_BLOB in_input_buffer;
  53         uint32_t in_additional_information;
  54         uint32_t in_flags;
  55         uint64_t in_file_id_persistent;
  56         uint64_t in_file_id_volatile;
  57         struct tevent_req *subreq;
  58
  59         inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
  60         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  61                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  62         }
  63
  64         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  65
  66         body_size = SVAL(inbody, 0x00);
  67         if (body_size != expected_body_size) {
  68                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  69         }
  70
  71         in_info_type                    = CVAL(inbody, 0x02);
  72         in_file_info_class              = CVAL(inbody, 0x03);
  73         in_output_buffer_length         = IVAL(inbody, 0x04);
  74         in_input_buffer_offset          = SVAL(inbody, 0x08);
  75         /* 0x0A 2 bytes reserved */
  76         in_input_buffer_length          = IVAL(inbody, 0x0C);
  77         in_additional_information       = IVAL(inbody, 0x10);
  78         in_flags                        = IVAL(inbody, 0x14);
  79         in_file_id_persistent           = BVAL(inbody, 0x18);
  80         in_file_id_volatile             = BVAL(inbody, 0x20);
  81
  82         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  83                 /* This is ok */
  84         } else if (in_input_buffer_offset !=
  85                    (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  86                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  87         }
  88
  89         if (in_input_buffer_length > req->in.vector[i+2].iov_len) {
  90                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  91         }
  92
  93         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  94         in_input_buffer.length = in_input_buffer_length;
  95
  96         if (req->compat_chain_fsp) {
  97                 /* skip check */
  98         } else if (in_file_id_persistent != 0) {
  99                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 100         }
 101
 102         subreq = smbd_smb2_getinfo_send(req,
 103                                         req->conn->smb2.event_ctx,
 104                                         req,
 105                                         in_info_type,
 106                                         in_file_info_class,
 107                                         in_output_buffer_length,
 108                                         in_input_buffer,
 109                                         in_additional_information,
 110                                         in_flags,
 111                                         in_file_id_volatile);
 112         if (subreq == NULL) {
 113                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 114         }
 115         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 116
 117         if (tevent_req_is_in_progress(subreq)) {
 118                 return smbd_smb2_request_pending_queue(req);
 119         }
 120
 121         return NT_STATUS_OK;
 122 }
 123
 124 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 125 {
 126         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 127                                         struct smbd_smb2_request);
 128         int i = req->current_idx;
 129         uint8_t *outhdr;
 130         DATA_BLOB outbody;
 131         DATA_BLOB outdyn;
 132         uint16_t out_output_buffer_offset;
 133         DATA_BLOB out_output_buffer;
 134         NTSTATUS status;
 135         NTSTATUS error; /* transport error */
 136
 137         status = smbd_smb2_getinfo_recv(subreq,
 138                                         req,
 139                                         &out_output_buffer);
 140         TALLOC_FREE(subreq);
 141         if (!NT_STATUS_IS_OK(status)) {
 142                 error = smbd_smb2_request_error(req, status);
 143                 if (!NT_STATUS_IS_OK(error)) {
 144                         smbd_server_connection_terminate(req->conn,
 145                                                          nt_errstr(error));
 146                         return;
 147                 }
 148                 return;
 149         }
 150
 151         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 152
 153         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 154
 155         outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
 156         if (outbody.data == NULL) {
 157                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 158                 if (!NT_STATUS_IS_OK(error)) {
 159                         smbd_server_connection_terminate(req->conn,
 160                                                          nt_errstr(error));
 161                         return;
 162                 }
 163                 return;
 164         }
 165
 166         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 167         SSVAL(outbody.data, 0x02,
 168               out_output_buffer_offset);        /* output buffer offset */
 169         SIVAL(outbody.data, 0x04,
 170               out_output_buffer.length);        /* output buffer length */
 171
 172         outdyn = out_output_buffer;
 173
 174         error = smbd_smb2_request_done(req, outbody, &outdyn);
 175         if (!NT_STATUS_IS_OK(error)) {
 176                 smbd_server_connection_terminate(req->conn,
 177                                                  nt_errstr(error));
 178                 return;
 179         }
 180 }
 181
 182 struct smbd_smb2_getinfo_state {
 183         struct smbd_smb2_request *smb2req;
 184         NTSTATUS status;
 185         DATA_BLOB out_output_buffer;
 186 };
 187
 188 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 189                                                  struct tevent_context *ev,
 190                                                  struct smbd_smb2_request *smb2req,
 191                                                  uint8_t in_info_type,
 192                                                  uint8_t in_file_info_class,
 193                                                  uint32_t in_output_buffer_length,
 194                                                  DATA_BLOB in_input_buffer,
 195                                                  uint32_t in_additional_information,
 196                                                  uint32_t in_flags,
 197                                                  uint64_t in_file_id_volatile)
 198 {
 199         struct tevent_req *req;
 200         struct smbd_smb2_getinfo_state *state;
 201         struct smb_request *smbreq;
 202         connection_struct *conn = smb2req->tcon->compat_conn;
 203         files_struct *fsp;
 204
 205         req = tevent_req_create(mem_ctx, &state,
 206                                 struct smbd_smb2_getinfo_state);
 207         if (req == NULL) {
 208                 return NULL;
 209         }
 210         state->smb2req = smb2req;
 211         state->status = NT_STATUS_INTERNAL_ERROR;
 212         state->out_output_buffer = data_blob_null;
 213
 214         DEBUG(10,("smbd_smb2_getinfo_send: file_id[0x%016llX]\n",
 215                   (unsigned long long)in_file_id_volatile));
 216
 217         smbreq = smbd_smb2_fake_smb_request(smb2req);
 218         if (tevent_req_nomem(smbreq, req)) {
 219                 return tevent_req_post(req, ev);
 220         }
 221
 222         fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 223         if (fsp == NULL) {
 224                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 225                 return tevent_req_post(req, ev);
 226         }
 227         if (conn != fsp->conn) {
 228                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 229                 return tevent_req_post(req, ev);
 230         }
 231         if (smb2req->session->vuid != fsp->vuid) {
 232                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 233                 return tevent_req_post(req, ev);
 234         }
 235
 236         if (IS_IPC(conn)) {
 237                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 238                 return tevent_req_post(req, ev);
 239         }
 240
 241         switch (in_info_type) {
 242         case 0x01:/* SMB2_GETINFO_FILE */
 243         {
 244                 uint16_t file_info_level;
 245                 char *data = NULL;
 246                 unsigned int data_size = 0;
 247                 struct smb_filename *smb_fname = NULL;
 248                 bool delete_pending = false;
 249                 struct timespec write_time_ts;
 250                 struct file_id fileid;
 251                 struct ea_list *ea_list = NULL;
 252                 int lock_data_count = 0;
 253                 char *lock_data = NULL;
 254                 bool ms_dfs_link = false;
 255                 NTSTATUS status;
 256
 257                 ZERO_STRUCT(write_time_ts);
 258
 259                 switch (in_file_info_class) {
 260                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 261                         file_info_level = 0xFF00 | in_file_info_class;
 262                         break;
 263
 264                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 265                         file_info_level = 0xFF00 | in_file_info_class;
 266                         break;
 267
 268                 default:
 269                         /* the levels directly map to the passthru levels */
 270                         file_info_level = in_file_info_class + 1000;
 271                         break;
 272                 }
 273
 274                 status = create_synthetic_smb_fname_split(state,
 275                                                           fsp->fsp_name,
 276                                                           NULL,
 277                                                           &smb_fname);
 278                 if (!NT_STATUS_IS_OK(status)) {
 279                         tevent_req_nterror(req, status);
 280                         return tevent_req_post(req, ev);
 281                 }
 282
 283                 if (fsp->fake_file_handle) {
 284                         /*
 285                          * This is actually for the QUOTA_FAKE_FILE --metze
 286                          */
 287
 288                         /* We know this name is ok, it's already passed the checks. */
 289
 290                 } else if (fsp && (fsp->is_directory || fsp->fh->fd == -1)) {
 291                         /*
 292                          * This is actually a QFILEINFO on a directory
 293                          * handle (returned from an NT SMB). NT5.0 seems
 294                          * to do this call. JRA.
 295                          */
 296
 297                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 298                                 /* Always do lstat for UNIX calls. */
 299                                 if (SMB_VFS_LSTAT(conn, smb_fname)) {
 300                                         DEBUG(3,("call_trans2qfilepathinfo: "
 301                                                  "SMB_VFS_LSTAT of %s failed "
 302                                                  "(%s)\n",
 303                                                  smb_fname_str_dbg(smb_fname),
 304                                                  strerror(errno)));
 305                                         status = map_nt_error_from_unix(errno);
 306                                         tevent_req_nterror(req, status);
 307                                         return tevent_req_post(req, ev);
 308                                 }
 309                         } else if (SMB_VFS_STAT(conn, smb_fname)) {
 310                                 DEBUG(3,("call_trans2qfilepathinfo: "
 311                                          "SMB_VFS_STAT of %s failed (%s)\n",
 312                                          smb_fname_str_dbg(smb_fname),
 313                                          strerror(errno)));
 314                                 status = map_nt_error_from_unix(errno);
 315                                 tevent_req_nterror(req, status);
 316                                 return tevent_req_post(req, ev);
 317                         }
 318
 319                         fileid = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 320                         get_file_infos(fileid, &delete_pending, &write_time_ts);
 321                 } else {
 322                         /*
 323                          * Original code - this is an open file.
 324                          */
 325
 326                         if (SMB_VFS_FSTAT(fsp, &smb_fname->st) != 0) {
 327                                 DEBUG(3, ("fstat of fnum %d failed (%s)\n",
 328                                           fsp->fnum, strerror(errno)));
 329                                 status = map_nt_error_from_unix(errno);
 330                                 tevent_req_nterror(req, status);
 331                                 return tevent_req_post(req, ev);
 332                         }
 333                         fileid = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 334                         get_file_infos(fileid, &delete_pending, &write_time_ts);
 335                 }
 336
 337                 status = smbd_do_qfilepathinfo(conn, state,
 338                                                file_info_level,
 339                                                fsp,
 340                                                smb_fname,
 341                                                delete_pending,
 342                                                write_time_ts,
 343                                                ms_dfs_link,
 344                                                ea_list,
 345                                                lock_data_count,
 346                                                lock_data,
 347                                                STR_UNICODE,
 348                                                in_output_buffer_length,
 349                                                &data,
 350                                                &data_size);
 351                 if (!NT_STATUS_IS_OK(status)) {
 352                         SAFE_FREE(data);
 353                         tevent_req_nterror(req, status);
 354                         return tevent_req_post(req, ev);
 355                 }
 356                 if (data_size > 0) {
 357                         state->out_output_buffer = data_blob_talloc(state,
 358                                                                     data,
 359                                                                     data_size);
 360                         SAFE_FREE(data);
 361                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 362                                 return tevent_req_post(req, ev);
 363                         }
 364                 }
 365                 SAFE_FREE(data);
 366                 break;
 367         }
 368
 369         default:
 370                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 371                 return tevent_req_post(req, ev);
 372         }
 373
 374         tevent_req_done(req);
 375         return tevent_req_post(req, ev);
 376 }
 377
 378 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 379                                        TALLOC_CTX *mem_ctx,
 380                                        DATA_BLOB *out_output_buffer)
 381 {
 382         NTSTATUS status;
 383         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 384                                                 struct smbd_smb2_getinfo_state);
 385
 386         if (tevent_req_is_nterror(req, &status)) {
 387                 tevent_req_received(req);
 388                 return status;
 389         }
 390
 391         *out_output_buffer = state->out_output_buffer;
 392         talloc_steal(mem_ctx, out_output_buffer->data);
 393
 394         tevent_req_received(req);
 395         return NT_STATUS_OK;
 396 }