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