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),
  63                                    &dyn, &dyn_len)) {
  64                 tevent_req_oom(req);
  65                 return tevent_req_post(req, ev);
  66         }
  67
  68         if (strlen(mask) == 0) {
  69                 TALLOC_FREE(dyn);
  70                 dyn_len = 0;
  71         }
  72
  73         fixed = state->fixed;
  74         SSVAL(fixed, 0, 33);
  75         SCVAL(fixed, 2, level);
  76         SCVAL(fixed, 3, flags);
  77         SIVAL(fixed, 4, file_index);
  78         SBVAL(fixed, 8, fid_persistent);
  79         SBVAL(fixed, 16, fid_volatile);
  80         SSVAL(fixed, 24, SMB2_HDR_BODY + 32);
  81         SSVAL(fixed, 26, dyn_len);
  82         SSVAL(fixed, 28, outbuf_len);
  83
  84         if (dyn_len == 0) {
  85                 dyn = state->dyn_pad;
  86                 dyn_len = sizeof(state->dyn_pad);
  87         }
  88
  89         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_FIND,
  90                                   0, 0, /* flags */
  91                                   cli->timeout,
  92                                   cli->smb2.pid,
  93                                   cli->smb2.tid,
  94                                   cli->smb2.uid,
  95                                   state->fixed, sizeof(state->fixed),
  96                                   dyn, dyn_len);
  97         if (tevent_req_nomem(subreq, req)) {
  98                 return tevent_req_post(req, ev);
  99         }
 100         tevent_req_set_callback(subreq, smb2cli_query_directory_done, req);
 101         return req;
 102 }
 103
 104 static void smb2cli_query_directory_done(struct tevent_req *subreq)
 105 {
 106         struct tevent_req *req =
 107                 tevent_req_callback_data(subreq,
 108                 struct tevent_req);
 109         struct smb2cli_query_directory_state *state =
 110                 tevent_req_data(req,
 111                 struct smb2cli_query_directory_state);
 112         NTSTATUS status;
 113         struct iovec *iov;
 114         uint16_t data_offset;
 115         static const struct smb2cli_req_expected_response expected[] = {
 116         {
 117                 .status = NT_STATUS_OK,
 118                 .body_size = 0x09
 119         }
 120         };
 121
 122         status = smb2cli_req_recv(subreq, state, &iov,
 123                                   expected, ARRAY_SIZE(expected));
 124         if (tevent_req_nterror(req, status)) {
 125                 return;
 126         }
 127
 128         data_offset = SVAL(iov[1].iov_base, 2);
 129         state->data_length = IVAL(iov[1].iov_base, 4);
 130
 131         if ((data_offset != SMB2_HDR_BODY + 8) ||
 132             (state->data_length > iov[2].iov_len)) {
 133                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 134                 return;
 135         }
 136
 137         state->recv_iov = iov;
 138         state->data = (uint8_t *)iov[2].iov_base;
 139         tevent_req_done(req);
 140 }
 141
 142 NTSTATUS smb2cli_query_directory_recv(struct tevent_req *req,
 143                                        TALLOC_CTX *mem_ctx,
 144                                        uint8_t **data,
 145                                        uint32_t *data_length)
 146 {
 147         struct smb2cli_query_directory_state *state =
 148                 tevent_req_data(req,
 149                 struct smb2cli_query_directory_state);
 150         NTSTATUS status;
 151
 152         if (tevent_req_is_nterror(req, &status)) {
 153                 return status;
 154         }
 155         talloc_steal(mem_ctx, state->recv_iov);
 156         *data_length = state->data_length;
 157         *data = state->data;
 158         return NT_STATUS_OK;
 159 }
 160
 161 NTSTATUS smb2cli_query_directory(struct cli_state *cli,
 162                                  uint8_t level,
 163                                  uint8_t flags,
 164                                  uint32_t file_index,
 165                                  uint64_t fid_persistent,
 166                                  uint64_t fid_volatile,
 167                                  const char *mask,
 168                                  uint32_t outbuf_len,
 169                                  TALLOC_CTX *mem_ctx,
 170                                  uint8_t **data,
 171                                  uint32_t *data_length)
 172 {
 173         TALLOC_CTX *frame = talloc_stackframe();
 174         struct event_context *ev;
 175         struct tevent_req *req;
 176         NTSTATUS status = NT_STATUS_NO_MEMORY;
 177
 178         if (cli_has_async_calls(cli)) {
 179                 /*
 180                  * Can't use sync call while an async call is in flight
 181                  */
 182                 status = NT_STATUS_INVALID_PARAMETER;
 183                 goto fail;
 184         }
 185         ev = event_context_init(frame);
 186         if (ev == NULL) {
 187                 goto fail;
 188         }
 189         req = smb2cli_query_directory_send(frame, ev, cli, level, flags,
 190                                            file_index, fid_persistent,
 191                                            fid_volatile, mask, outbuf_len);
 192         if (req == NULL) {
 193                 goto fail;
 194         }
 195         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 196                 goto fail;
 197         }
 198         status = smb2cli_query_directory_recv(req, mem_ctx,
 199                                               data, data_length);
 200  fail:
 201         TALLOC_FREE(frame);
 202         return status;
 203 }