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 smb2_create_returns cr;
  33         struct smb2_create_blobs blobs;
  34 };
  35
  36 static void smb2cli_create_done(struct tevent_req *subreq);
  37
  38 struct tevent_req *smb2cli_create_send(
  39         TALLOC_CTX *mem_ctx,
  40         struct tevent_context *ev,
  41         struct smbXcli_conn *conn,
  42         uint32_t timeout_msec,
  43         struct smbXcli_session *session,
  44         struct smbXcli_tcon *tcon,
  45         const char *filename,
  46         uint8_t  oplock_level,          /* SMB2_OPLOCK_LEVEL_* */
  47         uint32_t impersonation_level,   /* SMB2_IMPERSONATION_* */
  48         uint32_t desired_access,
  49         uint32_t file_attributes,
  50         uint32_t share_access,
  51         uint32_t create_disposition,
  52         uint32_t create_options,
  53         struct smb2_create_blobs *blobs)
  54 {
  55         struct tevent_req *req, *subreq;
  56         struct smb2cli_create_state *state;
  57         uint8_t *fixed;
  58         uint8_t *name_utf16;
  59         size_t name_utf16_len;
  60         DATA_BLOB blob;
  61         NTSTATUS status;
  62         size_t blobs_offset;
  63         uint8_t *dyn;
  64         size_t dyn_len;
  65         size_t max_dyn_len;
  66         uint32_t additional_flags = 0;
  67         uint32_t clear_flags = 0;
  68
  69         req = tevent_req_create(mem_ctx, &state,
  70                                 struct smb2cli_create_state);
  71         if (req == NULL) {
  72                 return NULL;
  73         }
  74
  75         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  76                                    filename, strlen(filename),
  77                                    &name_utf16, &name_utf16_len)) {
  78                 tevent_req_oom(req);
  79                 return tevent_req_post(req, ev);
  80         }
  81
  82         if (strlen(filename) == 0) {
  83                 TALLOC_FREE(name_utf16);
  84                 name_utf16_len = 0;
  85         }
  86
  87         fixed = state->fixed;
  88
  89         SSVAL(fixed, 0, 57);
  90         SCVAL(fixed, 3, oplock_level);
  91         SIVAL(fixed, 4, impersonation_level);
  92         SIVAL(fixed, 24, desired_access);
  93         SIVAL(fixed, 28, file_attributes);
  94         SIVAL(fixed, 32, share_access);
  95         SIVAL(fixed, 36, create_disposition);
  96         SIVAL(fixed, 40, create_options);
  97
  98         SSVAL(fixed, 44, SMB2_HDR_BODY + 56);
  99         SSVAL(fixed, 46, name_utf16_len);
 100
 101         blob = data_blob_null;
 102
 103         if (blobs != NULL) {
 104                 status = smb2_create_blob_push(state, &blob, *blobs);
 105                 if (tevent_req_nterror(req, status)) {
 106                         return tevent_req_post(req, ev);
 107                 }
 108         }
 109
 110         blobs_offset = name_utf16_len;
 111         blobs_offset = ((blobs_offset + 3) & ~3);
 112
 113         if (blob.length > 0) {
 114                 SIVAL(fixed, 48, blobs_offset + SMB2_HDR_BODY + 56);
 115                 SIVAL(fixed, 52, blob.length);
 116         }
 117
 118         dyn_len = MAX(1, blobs_offset + blob.length);
 119         dyn = talloc_zero_array(state, uint8_t, dyn_len);
 120         if (tevent_req_nomem(dyn, req)) {
 121                 return tevent_req_post(req, ev);
 122         }
 123
 124         if (name_utf16) {
 125                 memcpy(dyn, name_utf16, name_utf16_len);
 126                 TALLOC_FREE(name_utf16);
 127         }
 128
 129         if (blob.data != NULL) {
 130                 memcpy(dyn + blobs_offset,
 131                        blob.data, blob.length);
 132                 data_blob_free(&blob);
 133         }
 134
 135         if (smbXcli_conn_dfs_supported(conn) &&
 136             smbXcli_tcon_is_dfs_share(tcon))
 137         {
 138                 additional_flags |= SMB2_HDR_FLAG_DFS;
 139         }
 140
 141         /*
 142          * We use max_dyn_len = 0
 143          * as we don't explicitly ask for any output length.
 144          *
 145          * But it's still possible for the server to return
 146          * large create blobs.
 147          */
 148         max_dyn_len = 0;
 149
 150         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_CREATE,
 151                                   additional_flags, clear_flags,
 152                                   timeout_msec,
 153                                   tcon,
 154                                   session,
 155                                   state->fixed, sizeof(state->fixed),
 156                                   dyn, dyn_len,
 157                                   max_dyn_len);
 158         if (tevent_req_nomem(subreq, req)) {
 159                 return tevent_req_post(req, ev);
 160         }
 161         tevent_req_set_callback(subreq, smb2cli_create_done, req);
 162         return req;
 163 }
 164
 165 static void smb2cli_create_done(struct tevent_req *subreq)
 166 {
 167         struct tevent_req *req =
 168                 tevent_req_callback_data(subreq,
 169                 struct tevent_req);
 170         struct smb2cli_create_state *state =
 171                 tevent_req_data(req,
 172                 struct smb2cli_create_state);
 173         NTSTATUS status;
 174         struct iovec *iov;
 175         uint8_t *body;
 176         uint32_t offset, length;
 177         static const struct smb2cli_req_expected_response expected[] = {
 178         {
 179                 .status = NT_STATUS_OK,
 180                 .body_size = 0x59
 181         }
 182         };
 183
 184         status = smb2cli_req_recv(subreq, state, &iov,
 185                                   expected, ARRAY_SIZE(expected));
 186         TALLOC_FREE(subreq);
 187         if (tevent_req_nterror(req, status)) {
 188                 return;
 189         }
 190
 191         body = (uint8_t *)iov[1].iov_base;
 192
 193         state->cr.oplock_level  = CVAL(body, 2);
 194         state->cr.create_action = IVAL(body, 4);
 195         state->cr.creation_time = BVAL(body, 8);
 196         state->cr.last_access_time = BVAL(body, 16);
 197         state->cr.last_write_time = BVAL(body, 24);
 198         state->cr.change_time   = BVAL(body, 32);
 199         state->cr.allocation_size = BVAL(body, 40);
 200         state->cr.end_of_file   = BVAL(body, 48);
 201         state->cr.file_attributes = IVAL(body, 56);
 202         state->fid_persistent   = BVAL(body, 64);
 203         state->fid_volatile     = BVAL(body, 72);
 204
 205         offset = IVAL(body, 80);
 206         length = IVAL(body, 84);
 207
 208         if ((offset != 0) && (length != 0)) {
 209                 if ((offset != SMB2_HDR_BODY + 88) ||
 210                     (length > iov[2].iov_len)) {
 211                         tevent_req_nterror(
 212                                 req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 213                         return;
 214                 }
 215                 status = smb2_create_blob_parse(
 216                         state, data_blob_const(iov[2].iov_base, length),
 217                         &state->blobs);
 218                 if (tevent_req_nterror(req, status)) {
 219                         return;
 220                 }
 221         }
 222         tevent_req_done(req);
 223 }
 224
 225 NTSTATUS smb2cli_create_recv(struct tevent_req *req,
 226                              uint64_t *fid_persistent,
 227                              uint64_t *fid_volatile,
 228                              struct smb2_create_returns *cr)
 229 {
 230         struct smb2cli_create_state *state =
 231                 tevent_req_data(req,
 232                 struct smb2cli_create_state);
 233         NTSTATUS status;
 234
 235         if (tevent_req_is_nterror(req, &status)) {
 236                 return status;
 237         }
 238         *fid_persistent = state->fid_persistent;
 239         *fid_volatile = state->fid_volatile;
 240         if (cr) {
 241                 *cr = state->cr;
 242         }
 243         return NT_STATUS_OK;
 244 }
 245
 246 NTSTATUS smb2cli_create(struct smbXcli_conn *conn,
 247                         uint32_t timeout_msec,
 248                         struct smbXcli_session *session,
 249                         struct smbXcli_tcon *tcon,
 250                         const char *filename,
 251                         uint8_t  oplock_level,       /* SMB2_OPLOCK_LEVEL_* */
 252                         uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */
 253                         uint32_t desired_access,
 254                         uint32_t file_attributes,
 255                         uint32_t share_access,
 256                         uint32_t create_disposition,
 257                         uint32_t create_options,
 258                         struct smb2_create_blobs *blobs,
 259                         uint64_t *fid_persistent,
 260                         uint64_t *fid_volatile,
 261                         struct smb2_create_returns *cr)
 262 {
 263         TALLOC_CTX *frame = talloc_stackframe();
 264         struct tevent_context *ev;
 265         struct tevent_req *req;
 266         NTSTATUS status = NT_STATUS_NO_MEMORY;
 267
 268         if (smbXcli_conn_has_async_calls(conn)) {
 269                 /*
 270                  * Can't use sync call while an async call is in flight
 271                  */
 272                 status = NT_STATUS_INVALID_PARAMETER;
 273                 goto fail;
 274         }
 275         ev = samba_tevent_context_init(frame);
 276         if (ev == NULL) {
 277                 goto fail;
 278         }
 279         req = smb2cli_create_send(frame, ev, conn, timeout_msec,
 280                                   session, tcon,
 281                                   filename, oplock_level,
 282                                   impersonation_level, desired_access,
 283                                   file_attributes, share_access,
 284                                   create_disposition, create_options,
 285                                   blobs);
 286         if (req == NULL) {
 287                 goto fail;
 288         }
 289         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 290                 goto fail;
 291         }
 292         status = smb2cli_create_recv(req, fid_persistent, fid_volatile, cr);
 293  fail:
 294         TALLOC_FREE(frame);
 295         return status;
 296 }