source3/libsmb/smb2cli_query_directory.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_query_directory_state {
  29         uint8_t fixed[32];
  30         struct iovec *recv_iov;
  31         uint8_t *data;
  32         uint32_t data_length;
  33 };
  34
  35 static void smb2cli_query_directory_done(struct tevent_req *subreq);
  36
  37 struct tevent_req *smb2cli_query_directory_send(TALLOC_CTX *mem_ctx,
  38                                                 struct tevent_context *ev,
  39                                                 struct cli_state *cli,
  40                                                 uint8_t level,
  41                                                 uint8_t flags,
  42                                                 uint32_t file_index,
  43                                                 uint64_t fid_persistent,
  44                                                 uint64_t fid_volatile,
  45                                                 const char *mask,
  46                                                 uint32_t outbuf_len)
  47 {
  48         struct tevent_req *req, *subreq;
  49         struct smb2cli_query_directory_state *state;
  50         uint8_t *fixed;
  51         uint8_t *dyn;
  52         size_t dyn_len;
  53
  54         req = tevent_req_create(mem_ctx, &state,
  55                                 struct smb2cli_query_directory_state);
  56         if (req == NULL) {
  57                 return NULL;
  58         }
  59
  60         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  61                                    mask, strlen(mask)+1,
  62                                    &dyn, &dyn_len)) {
  63                 tevent_req_oom(req);
  64                 return tevent_req_post(req, ev);
  65         }
  66
  67         fixed = state->fixed;
  68         SSVAL(fixed, 0, 33);
  69         SCVAL(fixed, 2, level);
  70         SCVAL(fixed, 3, flags);
  71         SIVAL(fixed, 4, file_index);
  72         SBVAL(fixed, 8, fid_persistent);
  73         SBVAL(fixed, 16, fid_volatile);
  74         SSVAL(fixed, 24, SMB2_HDR_BODY + 32);
  75         SSVAL(fixed, 26, dyn_len);
  76         SSVAL(fixed, 28, outbuf_len);
  77
  78         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_FIND, 0,
  79                                   state->fixed, sizeof(state->fixed),
  80                                   dyn, dyn_len);
  81         if (tevent_req_nomem(subreq, req)) {
  82                 return tevent_req_post(req, ev);
  83         }
  84         tevent_req_set_callback(subreq, smb2cli_query_directory_done, req);
  85         return req;
  86 }
  87
  88 static void smb2cli_query_directory_done(struct tevent_req *subreq)
  89 {
  90         struct tevent_req *req =
  91                 tevent_req_callback_data(subreq,
  92                 struct tevent_req);
  93         struct smb2cli_query_directory_state *state =
  94                 tevent_req_data(req,
  95                 struct smb2cli_query_directory_state);
  96         NTSTATUS status;
  97         struct iovec *iov;
  98         uint16_t data_offset;
  99
 100         status = smb2cli_req_recv(subreq, state, &iov, 9);
 101         if (tevent_req_nterror(req, status)) {
 102                 return;
 103         }
 104
 105         data_offset = SVAL(iov[1].iov_base, 2);
 106         state->data_length = IVAL(iov[1].iov_base, 4);
 107
 108         if ((data_offset != SMB2_HDR_BODY + 8) ||
 109             (state->data_length > iov[2].iov_len)) {
 110                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 111                 return;
 112         }
 113
 114         state->recv_iov = iov;
 115         state->data = (uint8_t *)iov[2].iov_base;
 116         tevent_req_done(req);
 117 }
 118
 119 NTSTATUS smb2cli_query_directory_recv(struct tevent_req *req,
 120                                        TALLOC_CTX *mem_ctx,
 121                                        uint8_t **data,
 122                                        uint32_t *data_length)
 123 {
 124         struct smb2cli_query_directory_state *state =
 125                 tevent_req_data(req,
 126                 struct smb2cli_query_directory_state);
 127         NTSTATUS status;
 128
 129         if (tevent_req_is_nterror(req, &status)) {
 130                 return status;
 131         }
 132         talloc_steal(mem_ctx, state->recv_iov);
 133         *data_length = state->data_length;
 134         *data = state->data;
 135         return NT_STATUS_OK;
 136 }
 137
 138 NTSTATUS smb2cli_query_directory(struct cli_state *cli,
 139                                  uint8_t level,
 140                                  uint8_t flags,
 141                                  uint32_t file_index,
 142                                  uint64_t fid_persistent,
 143                                  uint64_t fid_volatile,
 144                                  const char *mask,
 145                                  uint32_t outbuf_len,
 146                                  TALLOC_CTX *mem_ctx,
 147                                  uint8_t **data,
 148                                  uint32_t *data_length)
 149 {
 150         TALLOC_CTX *frame = talloc_stackframe();
 151         struct event_context *ev;
 152         struct tevent_req *req;
 153         NTSTATUS status = NT_STATUS_NO_MEMORY;
 154
 155         if (cli_has_async_calls(cli)) {
 156                 /*
 157                  * Can't use sync call while an async call is in flight
 158                  */
 159                 status = NT_STATUS_INVALID_PARAMETER;
 160                 goto fail;
 161         }
 162         ev = event_context_init(frame);
 163         if (ev == NULL) {
 164                 goto fail;
 165         }
 166         req = smb2cli_query_directory_send(frame, ev, cli, level, flags,
 167                                            file_index, fid_persistent,
 168                                            fid_volatile, mask, outbuf_len);
 169         if (req == NULL) {
 170                 goto fail;
 171         }
 172         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 173                 goto fail;
 174         }
 175         status = smb2cli_query_directory_recv(req, mem_ctx,
 176                                               data, data_length);
 177  fail:
 178         TALLOC_FREE(frame);
 179         return status;
 180 }