libcli/smb/smb2cli_create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    smb2 lib
   4    Copyright (C) Volker Lendecke 2011
   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
  20 #include "includes.h"
  21 #include "system/network.h"
  22 #include "lib/util/tevent_ntstatus.h"
  23 #include "smb_common.h"
  24 #include "smbXcli_base.h"
  25 #include "smb2_create_blob.h"
  26
  27 struct smb2cli_create_state {
  28         uint8_t fixed[56];
  29
  30         uint64_t fid_persistent;
  31         uint64_t fid_volatile;
  32         struct smb_create_returns cr;
  33         struct smb2_create_blobs blobs;
  34         struct tevent_req *subreq;
  35 };
  36
  37 static void smb2cli_create_done(struct tevent_req *subreq);
  38 static bool smb2cli_create_cancel(struct tevent_req *req);
  39
  40 struct tevent_req *smb2cli_create_send(
  41         TALLOC_CTX *mem_ctx,
  42         struct tevent_context *ev,
  43         struct smbXcli_conn *conn,
  44         uint32_t timeout_msec,
  45         struct smbXcli_session *session,
  46         struct smbXcli_tcon *tcon,
  47         const char *filename,
  48         uint8_t  oplock_level,          /* SMB2_OPLOCK_LEVEL_* */
  49         uint32_t impersonation_level,   /* SMB2_IMPERSONATION_* */
  50         uint32_t desired_access,
  51         uint32_t file_attributes,
  52         uint32_t share_access,
  53         uint32_t create_disposition,
  54         uint32_t create_options,
  55         struct smb2_create_blobs *blobs)
  56 {
  57         struct tevent_req *req, *subreq;
  58         struct smb2cli_create_state *state;
  59         uint8_t *fixed;
  60         uint8_t *name_utf16;
  61         size_t name_utf16_len;
  62         DATA_BLOB blob;
  63         NTSTATUS status;
  64         size_t blobs_offset;
  65         uint8_t *dyn;
  66         size_t dyn_len;
  67         size_t max_dyn_len;
  68         uint32_t additional_flags = 0;
  69         uint32_t clear_flags = 0;
  70
  71         req = tevent_req_create(mem_ctx, &state,
  72                                 struct smb2cli_create_state);
  73         if (req == NULL) {
  74                 return NULL;
  75         }
  76
  77         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  78                                    filename, strlen(filename),
  79                                    &name_utf16, &name_utf16_len)) {
  80                 tevent_req_oom(req);
  81                 return tevent_req_post(req, ev);
  82         }
  83
  84         if (strlen(filename) == 0) {
  85                 TALLOC_FREE(name_utf16);
  86                 name_utf16_len = 0;
  87         }
  88
  89         fixed = state->fixed;
  90
  91         SSVAL(fixed, 0, 57);
  92         SCVAL(fixed, 3, oplock_level);
  93         SIVAL(fixed, 4, impersonation_level);
  94         SIVAL(fixed, 24, desired_access);
  95         SIVAL(fixed, 28, file_attributes);
  96         SIVAL(fixed, 32, share_access);
  97         SIVAL(fixed, 36, create_disposition);
  98         SIVAL(fixed, 40, create_options);
  99
 100         SSVAL(fixed, 44, SMB2_HDR_BODY + 56);
 101         SSVAL(fixed, 46, name_utf16_len);
 102
 103         blob = data_blob_null;
 104
 105         if (blobs != NULL) {
 106                 status = smb2_create_blob_push(state, &blob, *blobs);
 107                 if (tevent_req_nterror(req, status)) {
 108                         return tevent_req_post(req, ev);
 109                 }
 110         }
 111
 112         blobs_offset = name_utf16_len;
 113         blobs_offset = ((blobs_offset + 3) & ~3);
 114
 115         if (blob.length > 0) {
 116                 blobs_offset = ((blobs_offset + 7) & ~7);
 117                 SIVAL(fixed, 48, blobs_offset + SMB2_HDR_BODY + 56);
 118                 SIVAL(fixed, 52, blob.length);
 119         }
 120
 121         dyn_len = MAX(1, blobs_offset + blob.length);
 122         dyn = talloc_zero_array(state, uint8_t, dyn_len);
 123         if (tevent_req_nomem(dyn, req)) {
 124                 return tevent_req_post(req, ev);
 125         }
 126
 127         if (name_utf16) {
 128                 memcpy(dyn, name_utf16, name_utf16_len);
 129                 TALLOC_FREE(name_utf16);
 130         }
 131
 132         if (blob.data != NULL) {
 133                 memcpy(dyn + blobs_offset,
 134                        blob.data, blob.length);
 135                 data_blob_free(&blob);
 136         }
 137
 138         if (smbXcli_conn_dfs_supported(conn) &&
 139             smbXcli_tcon_is_dfs_share(tcon))
 140         {
 141                 additional_flags |= SMB2_HDR_FLAG_DFS;
 142         }
 143
 144         /*
 145          * We use max_dyn_len = 0
 146          * as we don't explicitly ask for any output length.
 147          *
 148          * But it's still possible for the server to return
 149          * large create blobs.
 150          */
 151         max_dyn_len = 0;
 152
 153         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_CREATE,
 154                                   additional_flags, clear_flags,
 155                                   timeout_msec,
 156                                   tcon,
 157                                   session,
 158                                   state->fixed, sizeof(state->fixed),
 159                                   dyn, dyn_len,
 160                                   max_dyn_len);
 161         if (tevent_req_nomem(subreq, req)) {
 162                 return tevent_req_post(req, ev);
 163         }
 164         tevent_req_set_callback(subreq, smb2cli_create_done, req);
 165
 166         state->subreq = subreq;
 167         tevent_req_set_cancel_fn(req, smb2cli_create_cancel);
 168
 169         return req;
 170 }
 171
 172 static bool smb2cli_create_cancel(struct tevent_req *req)
 173 {
 174         struct smb2cli_create_state *state = tevent_req_data(req,
 175                 struct smb2cli_create_state);
 176         return tevent_req_cancel(state->subreq);
 177 }
 178
 179 static void smb2cli_create_done(struct tevent_req *subreq)
 180 {
 181         struct tevent_req *req =
 182                 tevent_req_callback_data(subreq,
 183                 struct tevent_req);
 184         struct smb2cli_create_state *state =
 185                 tevent_req_data(req,
 186                 struct smb2cli_create_state);
 187         NTSTATUS status;
 188         struct iovec *iov;
 189         uint8_t *body;
 190         uint32_t offset, length;
 191         static const struct smb2cli_req_expected_response expected[] = {
 192         {
 193                 .status = NT_STATUS_OK,
 194                 .body_size = 0x59
 195         }
 196         };
 197
 198         status = smb2cli_req_recv(subreq, state, &iov,
 199                                   expected, ARRAY_SIZE(expected));
 200         TALLOC_FREE(subreq);
 201         if (tevent_req_nterror(req, status)) {
 202                 return;
 203         }
 204
 205         body = (uint8_t *)iov[1].iov_base;
 206
 207         state->cr.oplock_level  = CVAL(body, 2);
 208         state->cr.create_action = IVAL(body, 4);
 209         state->cr.creation_time = BVAL(body, 8);
 210         state->cr.last_access_time = BVAL(body, 16);
 211         state->cr.last_write_time = BVAL(body, 24);
 212         state->cr.change_time   = BVAL(body, 32);
 213         state->cr.allocation_size = BVAL(body, 40);
 214         state->cr.end_of_file   = BVAL(body, 48);
 215         state->cr.file_attributes = IVAL(body, 56);
 216         state->fid_persistent   = BVAL(body, 64);
 217         state->fid_volatile     = BVAL(body, 72);
 218
 219         offset = IVAL(body, 80);
 220         length = IVAL(body, 84);
 221
 222         if ((offset != 0) && (length != 0)) {
 223                 if ((offset != SMB2_HDR_BODY + 88) ||
 224                     (length > iov[2].iov_len)) {
 225                         tevent_req_nterror(
 226                                 req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 227                         return;
 228                 }
 229                 status = smb2_create_blob_parse(
 230                         state, data_blob_const(iov[2].iov_base, length),
 231                         &state->blobs);
 232                 if (tevent_req_nterror(req, status)) {
 233                         return;
 234                 }
 235         }
 236         tevent_req_done(req);
 237 }
 238
 239 NTSTATUS smb2cli_create_recv(struct tevent_req *req,
 240                              uint64_t *fid_persistent,
 241                              uint64_t *fid_volatile,
 242                              struct smb_create_returns *cr,
 243                              TALLOC_CTX *mem_ctx,
 244                              struct smb2_create_blobs *blobs)
 245 {
 246         struct smb2cli_create_state *state =
 247                 tevent_req_data(req,
 248                 struct smb2cli_create_state);
 249         NTSTATUS status;
 250
 251         if (tevent_req_is_nterror(req, &status)) {
 252                 return status;
 253         }
 254         *fid_persistent = state->fid_persistent;
 255         *fid_volatile = state->fid_volatile;
 256         if (cr) {
 257                 *cr = state->cr;
 258         }
 259         if (blobs) {
 260                 blobs->num_blobs = state->blobs.num_blobs;
 261                 blobs->blobs = talloc_move(mem_ctx, &state->blobs.blobs);
 262         }
 263         return NT_STATUS_OK;
 264 }
 265
 266 NTSTATUS smb2cli_create(struct smbXcli_conn *conn,
 267                         uint32_t timeout_msec,
 268                         struct smbXcli_session *session,
 269                         struct smbXcli_tcon *tcon,
 270                         const char *filename,
 271                         uint8_t  oplock_level,       /* SMB2_OPLOCK_LEVEL_* */
 272                         uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */
 273                         uint32_t desired_access,
 274                         uint32_t file_attributes,
 275                         uint32_t share_access,
 276                         uint32_t create_disposition,
 277                         uint32_t create_options,
 278                         struct smb2_create_blobs *blobs,
 279                         uint64_t *fid_persistent,
 280                         uint64_t *fid_volatile,
 281                         struct smb_create_returns *cr,
 282                         TALLOC_CTX *mem_ctx,
 283                         struct smb2_create_blobs *ret_blobs)
 284 {
 285         TALLOC_CTX *frame = talloc_stackframe();
 286         struct tevent_context *ev;
 287         struct tevent_req *req;
 288         NTSTATUS status = NT_STATUS_NO_MEMORY;
 289
 290         if (smbXcli_conn_has_async_calls(conn)) {
 291                 /*
 292                  * Can't use sync call while an async call is in flight
 293                  */
 294                 status = NT_STATUS_INVALID_PARAMETER;
 295                 goto fail;
 296         }
 297         ev = samba_tevent_context_init(frame);
 298         if (ev == NULL) {
 299                 goto fail;
 300         }
 301         req = smb2cli_create_send(frame, ev, conn, timeout_msec,
 302                                   session, tcon,
 303                                   filename, oplock_level,
 304                                   impersonation_level, desired_access,
 305                                   file_attributes, share_access,
 306                                   create_disposition, create_options,
 307                                   blobs);
 308         if (req == NULL) {
 309                 goto fail;
 310         }
 311         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 312                 goto fail;
 313         }
 314         status = smb2cli_create_recv(req, fid_persistent, fid_volatile, cr,
 315                                      mem_ctx, ret_blobs);
 316  fail:
 317         TALLOC_FREE(frame);
 318         return status;
 319 }