source3/libsmb/smb2cli_write.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 "client.h"
  22 #include "async_smb.h"
  23 #include "../libcli/smb/smbXcli_base.h"
  24 #include "smb2cli.h"
  25 #include "libsmb/proto.h"
  26 #include "lib/util/tevent_ntstatus.h"
  27
  28 struct smb2cli_write_state {
  29         uint8_t fixed[48];
  30         uint8_t dyn_pad[1];
  31 };
  32
  33 static void smb2cli_write_done(struct tevent_req *subreq);
  34
  35 struct tevent_req *smb2cli_write_send(TALLOC_CTX *mem_ctx,
  36                                       struct tevent_context *ev,
  37                                       struct smbXcli_conn *conn,
  38                                       uint32_t timeout_msec,
  39                                       struct smbXcli_session *session,
  40                                       uint32_t tcon_id,
  41                                       uint32_t length,
  42                                       uint64_t offset,
  43                                       uint64_t fid_persistent,
  44                                       uint64_t fid_volatile,
  45                                       uint32_t remaining_bytes,
  46                                       uint32_t flags,
  47                                       const uint8_t *data)
  48 {
  49         struct tevent_req *req, *subreq;
  50         struct smb2cli_write_state *state;
  51         uint8_t *fixed;
  52         const uint8_t *dyn;
  53         size_t dyn_len;
  54
  55         req = tevent_req_create(mem_ctx, &state,
  56                                 struct smb2cli_write_state);
  57         if (req == NULL) {
  58                 return NULL;
  59         }
  60
  61         fixed = state->fixed;
  62
  63         SSVAL(fixed, 0, 49);
  64         SSVAL(fixed, 2, SMB2_HDR_BODY + 48);
  65         SIVAL(fixed, 4, length);
  66         SBVAL(fixed, 8, offset);
  67         SBVAL(fixed, 16, fid_persistent);
  68         SBVAL(fixed, 24, fid_volatile);
  69         SIVAL(fixed, 36, remaining_bytes);
  70         SIVAL(fixed, 44, flags);
  71
  72         if (length > 0) {
  73                 dyn = data;
  74                 dyn_len = length;
  75         } else {
  76                 dyn = state->dyn_pad;;
  77                 dyn_len = sizeof(state->dyn_pad);
  78         }
  79
  80         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_WRITE,
  81                                   0, 0, /* flags */
  82                                   timeout_msec,
  83                                   0xFEFF, /* pid */
  84                                   tcon_id,
  85                                   session,
  86                                   state->fixed, sizeof(state->fixed),
  87                                   dyn, dyn_len);
  88         if (tevent_req_nomem(subreq, req)) {
  89                 return tevent_req_post(req, ev);
  90         }
  91         tevent_req_set_callback(subreq, smb2cli_write_done, req);
  92         return req;
  93 }
  94
  95 static void smb2cli_write_done(struct tevent_req *subreq)
  96 {
  97         struct tevent_req *req =
  98                 tevent_req_callback_data(subreq,
  99                 struct tevent_req);
 100         NTSTATUS status;
 101         static const struct smb2cli_req_expected_response expected[] = {
 102         {
 103                 .status = NT_STATUS_OK,
 104                 .body_size = 0x11
 105         }
 106         };
 107
 108         status = smb2cli_req_recv(subreq, NULL, NULL,
 109                                   expected, ARRAY_SIZE(expected));
 110         if (tevent_req_nterror(req, status)) {
 111                 return;
 112         }
 113         tevent_req_done(req);
 114 }
 115
 116 NTSTATUS smb2cli_write_recv(struct tevent_req *req)
 117 {
 118         return tevent_req_simple_recv_ntstatus(req);
 119 }
 120
 121 NTSTATUS smb2cli_write(struct smbXcli_conn *conn,
 122                        uint32_t timeout_msec,
 123                        struct smbXcli_session *session,
 124                        uint32_t tcon_id,
 125                        uint32_t length,
 126                        uint64_t offset,
 127                        uint64_t fid_persistent,
 128                        uint64_t fid_volatile,
 129                        uint32_t remaining_bytes,
 130                        uint32_t flags,
 131                        const uint8_t *data)
 132 {
 133         TALLOC_CTX *frame = talloc_stackframe();
 134         struct event_context *ev;
 135         struct tevent_req *req;
 136         NTSTATUS status = NT_STATUS_NO_MEMORY;
 137
 138         if (smbXcli_conn_has_async_calls(conn)) {
 139                 /*
 140                  * Can't use sync call while an async call is in flight
 141                  */
 142                 status = NT_STATUS_INVALID_PARAMETER;
 143                 goto fail;
 144         }
 145         ev = event_context_init(frame);
 146         if (ev == NULL) {
 147                 goto fail;
 148         }
 149         req = smb2cli_write_send(frame, ev, conn, timeout_msec, session,
 150                                  tcon_id, length, offset,
 151                                  fid_persistent, fid_volatile,
 152                                  remaining_bytes, flags, data);
 153         if (req == NULL) {
 154                 goto fail;
 155         }
 156         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 157                 goto fail;
 158         }
 159         status = smb2cli_write_recv(req);
 160  fail:
 161         TALLOC_FREE(frame);
 162         return status;
 163 }