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 "smb2cli_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 cli_state *cli,
  38                                       uint32_t length,
  39                                       uint64_t offset,
  40                                       uint64_t fid_persistent,
  41                                       uint64_t fid_volatile,
  42                                       uint32_t remaining_bytes,
  43                                       uint32_t flags,
  44                                       const uint8_t *data)
  45 {
  46         struct tevent_req *req, *subreq;
  47         struct smb2cli_write_state *state;
  48         uint8_t *fixed;
  49         const uint8_t *dyn;
  50         size_t dyn_len;
  51
  52         req = tevent_req_create(mem_ctx, &state,
  53                                 struct smb2cli_write_state);
  54         if (req == NULL) {
  55                 return NULL;
  56         }
  57
  58         fixed = state->fixed;
  59
  60         SSVAL(fixed, 0, 49);
  61         SSVAL(fixed, 2, SMB2_HDR_BODY + 48);
  62         SIVAL(fixed, 4, length);
  63         SBVAL(fixed, 8, offset);
  64         SBVAL(fixed, 16, fid_persistent);
  65         SBVAL(fixed, 24, fid_volatile);
  66         SIVAL(fixed, 36, remaining_bytes);
  67         SIVAL(fixed, 44, flags);
  68
  69         if (length > 0) {
  70                 dyn = data;
  71                 dyn_len = length;
  72         } else {
  73                 dyn = state->dyn_pad;;
  74                 dyn_len = sizeof(state->dyn_pad);
  75         }
  76
  77         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_WRITE,
  78                                   0, 0, /* flags */
  79                                   cli->timeout,
  80                                   cli->smb2.pid,
  81                                   cli->smb2.tid,
  82                                   cli->smb2.uid,
  83                                   state->fixed, sizeof(state->fixed),
  84                                   dyn, dyn_len);
  85         if (tevent_req_nomem(subreq, req)) {
  86                 return tevent_req_post(req, ev);
  87         }
  88         tevent_req_set_callback(subreq, smb2cli_write_done, req);
  89         return req;
  90 }
  91
  92 static void smb2cli_write_done(struct tevent_req *subreq)
  93 {
  94         struct tevent_req *req =
  95                 tevent_req_callback_data(subreq,
  96                 struct tevent_req);
  97         NTSTATUS status;
  98         struct iovec *iov;
  99         static const struct smb2cli_req_expected_response expected[] = {
 100         {
 101                 .status = NT_STATUS_OK,
 102                 .body_size = 0x11
 103         }
 104         };
 105
 106         status = smb2cli_req_recv(subreq, talloc_tos(), &iov,
 107                                   expected, ARRAY_SIZE(expected));
 108         if (tevent_req_nterror(req, status)) {
 109                 return;
 110         }
 111         tevent_req_done(req);
 112 }
 113
 114 NTSTATUS smb2cli_write_recv(struct tevent_req *req)
 115 {
 116         return tevent_req_simple_recv_ntstatus(req);
 117 }
 118
 119 NTSTATUS smb2cli_write(struct cli_state *cli,
 120                        uint32_t length,
 121                        uint64_t offset,
 122                        uint64_t fid_persistent,
 123                        uint64_t fid_volatile,
 124                        uint32_t remaining_bytes,
 125                        uint32_t flags,
 126                        const uint8_t *data)
 127 {
 128         TALLOC_CTX *frame = talloc_stackframe();
 129         struct event_context *ev;
 130         struct tevent_req *req;
 131         NTSTATUS status = NT_STATUS_NO_MEMORY;
 132
 133         if (cli_has_async_calls(cli)) {
 134                 /*
 135                  * Can't use sync call while an async call is in flight
 136                  */
 137                 status = NT_STATUS_INVALID_PARAMETER;
 138                 goto fail;
 139         }
 140         ev = event_context_init(frame);
 141         if (ev == NULL) {
 142                 goto fail;
 143         }
 144         req = smb2cli_write_send(frame, ev, cli, length, offset,
 145                                  fid_persistent, fid_volatile,
 146                                  remaining_bytes, flags, data);
 147         if (req == NULL) {
 148                 goto fail;
 149         }
 150         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 151                 goto fail;
 152         }
 153         status = smb2cli_write_recv(req);
 154  fail:
 155         TALLOC_FREE(frame);
 156         return status;
 157 }