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         uint8_t dyn_pad[1];
  31         struct iovec *recv_iov;
  32         uint8_t *data;
  33         uint32_t data_length;
  34 };
  35
  36 static void smb2cli_query_directory_done(struct tevent_req *subreq);
  37
  38 struct tevent_req *smb2cli_query_directory_send(TALLOC_CTX *mem_ctx,
  39                                                 struct tevent_context *ev,
  40                                                 struct cli_state *cli,
  41                                                 uint8_t level,
  42                                                 uint8_t flags,
  43                                                 uint32_t file_index,
  44                                                 uint64_t fid_persistent,
  45                                                 uint64_t fid_volatile,
  46                                                 const char *mask,
  47                                                 uint32_t outbuf_len)
  48 {
  49         struct tevent_req *req, *subreq;
  50         struct smb2cli_query_directory_state *state;
  51         uint8_t *fixed;
  52         uint8_t *dyn;
  53         size_t dyn_len;
  54
  55         req = tevent_req_create(mem_ctx, &state,
  56                                 struct smb2cli_query_directory_state);
  57         if (req == NULL) {
  58                 return NULL;
  59         }
  60
  61         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  62                                    mask, strlen(mask)+1,
  63                                    &dyn, &dyn_len)) {
  64                 tevent_req_oom(req);
  65                 return tevent_req_post(req, ev);
  66         }
  67
  68         fixed = state->fixed;
  69         SSVAL(fixed, 0, 33);
  70         SCVAL(fixed, 2, level);
  71         SCVAL(fixed, 3, flags);
  72         SIVAL(fixed, 4, file_index);
  73         SBVAL(fixed, 8, fid_persistent);
  74         SBVAL(fixed, 16, fid_volatile);
  75         SSVAL(fixed, 24, SMB2_HDR_BODY + 32);
  76         SSVAL(fixed, 26, dyn_len);
  77         SSVAL(fixed, 28, outbuf_len);
  78
  79         if (dyn_len == 0) {
  80                 dyn = state->dyn_pad;
  81                 dyn_len = sizeof(state->dyn_pad);
  82         }
  83
  84         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_FIND,
  85                                   0, 0, /* flags */
  86                                   cli->smb2.pid,
  87                                   cli->smb2.tid,
  88                                   cli->smb2.uid,
  89                                   state->fixed, sizeof(state->fixed),
  90                                   dyn, dyn_len);
  91         if (tevent_req_nomem(subreq, req)) {
  92                 return tevent_req_post(req, ev);
  93         }
  94         tevent_req_set_callback(subreq, smb2cli_query_directory_done, req);
  95         return req;
  96 }
  97
  98 static void smb2cli_query_directory_done(struct tevent_req *subreq)
  99 {
 100         struct tevent_req *req =
 101                 tevent_req_callback_data(subreq,
 102                 struct tevent_req);
 103         struct smb2cli_query_directory_state *state =
 104                 tevent_req_data(req,
 105                 struct smb2cli_query_directory_state);
 106         NTSTATUS status;
 107         struct iovec *iov;
 108         uint16_t data_offset;
 109
 110         status = smb2cli_req_recv(subreq, state, &iov, 9);
 111         if (tevent_req_nterror(req, status)) {
 112                 return;
 113         }
 114
 115         data_offset = SVAL(iov[1].iov_base, 2);
 116         state->data_length = IVAL(iov[1].iov_base, 4);
 117
 118         if ((data_offset != SMB2_HDR_BODY + 8) ||
 119             (state->data_length > iov[2].iov_len)) {
 120                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 121                 return;
 122         }
 123
 124         state->recv_iov = iov;
 125         state->data = (uint8_t *)iov[2].iov_base;
 126         tevent_req_done(req);
 127 }
 128
 129 NTSTATUS smb2cli_query_directory_recv(struct tevent_req *req,
 130                                        TALLOC_CTX *mem_ctx,
 131                                        uint8_t **data,
 132                                        uint32_t *data_length)
 133 {
 134         struct smb2cli_query_directory_state *state =
 135                 tevent_req_data(req,
 136                 struct smb2cli_query_directory_state);
 137         NTSTATUS status;
 138
 139         if (tevent_req_is_nterror(req, &status)) {
 140                 return status;
 141         }
 142         talloc_steal(mem_ctx, state->recv_iov);
 143         *data_length = state->data_length;
 144         *data = state->data;
 145         return NT_STATUS_OK;
 146 }
 147
 148 NTSTATUS smb2cli_query_directory(struct cli_state *cli,
 149                                  uint8_t level,
 150                                  uint8_t flags,
 151                                  uint32_t file_index,
 152                                  uint64_t fid_persistent,
 153                                  uint64_t fid_volatile,
 154                                  const char *mask,
 155                                  uint32_t outbuf_len,
 156                                  TALLOC_CTX *mem_ctx,
 157                                  uint8_t **data,
 158                                  uint32_t *data_length)
 159 {
 160         TALLOC_CTX *frame = talloc_stackframe();
 161         struct event_context *ev;
 162         struct tevent_req *req;
 163         NTSTATUS status = NT_STATUS_NO_MEMORY;
 164
 165         if (cli_has_async_calls(cli)) {
 166                 /*
 167                  * Can't use sync call while an async call is in flight
 168                  */
 169                 status = NT_STATUS_INVALID_PARAMETER;
 170                 goto fail;
 171         }
 172         ev = event_context_init(frame);
 173         if (ev == NULL) {
 174                 goto fail;
 175         }
 176         req = smb2cli_query_directory_send(frame, ev, cli, level, flags,
 177                                            file_index, fid_persistent,
 178                                            fid_volatile, mask, outbuf_len);
 179         if (req == NULL) {
 180                 goto fail;
 181         }
 182         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 183                 goto fail;
 184         }
 185         status = smb2cli_query_directory_recv(req, mem_ctx,
 186                                               data, data_length);
 187  fail:
 188         TALLOC_FREE(frame);
 189         return status;
 190 }