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 };
  31
  32 static void smb2cli_write_done(struct tevent_req *subreq);
  33
  34 struct tevent_req *smb2cli_write_send(TALLOC_CTX *mem_ctx,
  35                                       struct tevent_context *ev,
  36                                       struct cli_state *cli,
  37                                       uint32_t length,
  38                                       uint64_t offset,
  39                                       uint64_t fid_persistent,
  40                                       uint64_t fid_volatile,
  41                                       uint32_t remaining_bytes,
  42                                       uint32_t flags,
  43                                       const uint8_t *data)
  44 {
  45         struct tevent_req *req, *subreq;
  46         struct smb2cli_write_state *state;
  47         uint8_t *fixed;
  48
  49         req = tevent_req_create(mem_ctx, &state,
  50                                 struct smb2cli_write_state);
  51         if (req == NULL) {
  52                 return NULL;
  53         }
  54
  55         fixed = state->fixed;
  56
  57         SSVAL(fixed, 0, 49);
  58         SSVAL(fixed, 2, SMB2_HDR_BODY + 48);
  59         SIVAL(fixed, 4, length);
  60         SBVAL(fixed, 8, offset);
  61         SBVAL(fixed, 16, fid_persistent);
  62         SBVAL(fixed, 24, fid_volatile);
  63         SIVAL(fixed, 36, remaining_bytes);
  64         SIVAL(fixed, 44, flags);
  65
  66         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_WRITE,
  67                                   0, 0, /* flags */
  68                                   cli->smb2.pid,
  69                                   cli->smb2.tid,
  70                                   cli->smb2.uid,
  71                                   state->fixed, sizeof(state->fixed),
  72                                   data, length);
  73         if (tevent_req_nomem(subreq, req)) {
  74                 return tevent_req_post(req, ev);
  75         }
  76         tevent_req_set_callback(subreq, smb2cli_write_done, req);
  77         return req;
  78 }
  79
  80 static void smb2cli_write_done(struct tevent_req *subreq)
  81 {
  82         struct tevent_req *req =
  83                 tevent_req_callback_data(subreq,
  84                 struct tevent_req);
  85         NTSTATUS status;
  86         struct iovec *iov;
  87
  88         status = smb2cli_req_recv(subreq, talloc_tos(), &iov, 17);
  89         if (tevent_req_nterror(req, status)) {
  90                 return;
  91         }
  92         tevent_req_done(req);
  93 }
  94
  95 NTSTATUS smb2cli_write_recv(struct tevent_req *req)
  96 {
  97         return tevent_req_simple_recv_ntstatus(req);
  98 }
  99
 100 NTSTATUS smb2cli_write(struct cli_state *cli,
 101                        uint32_t length,
 102                        uint64_t offset,
 103                        uint64_t fid_persistent,
 104                        uint64_t fid_volatile,
 105                        uint32_t remaining_bytes,
 106                        uint32_t flags,
 107                        const uint8_t *data)
 108 {
 109         TALLOC_CTX *frame = talloc_stackframe();
 110         struct event_context *ev;
 111         struct tevent_req *req;
 112         NTSTATUS status = NT_STATUS_NO_MEMORY;
 113
 114         if (cli_has_async_calls(cli)) {
 115                 /*
 116                  * Can't use sync call while an async call is in flight
 117                  */
 118                 status = NT_STATUS_INVALID_PARAMETER;
 119                 goto fail;
 120         }
 121         ev = event_context_init(frame);
 122         if (ev == NULL) {
 123                 goto fail;
 124         }
 125         req = smb2cli_write_send(frame, ev, cli, length, offset,
 126                                  fid_persistent, fid_volatile,
 127                                  remaining_bytes, flags, data);
 128         if (req == NULL) {
 129                 goto fail;
 130         }
 131         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 132                 goto fail;
 133         }
 134         status = smb2cli_write_recv(req);
 135  fail:
 136         TALLOC_FREE(frame);
 137         return status;
 138 }