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,
  79                                   0, 0, /* flags */
  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_query_directory_done, req);
  89         return req;
  90 }
  91
  92 static void smb2cli_query_directory_done(struct tevent_req *subreq)
  93 {
  94         struct tevent_req *req =
  95                 tevent_req_callback_data(subreq,
  96                 struct tevent_req);
  97         struct smb2cli_query_directory_state *state =
  98                 tevent_req_data(req,
  99                 struct smb2cli_query_directory_state);
 100         NTSTATUS status;
 101         struct iovec *iov;
 102         uint16_t data_offset;
 103
 104         status = smb2cli_req_recv(subreq, state, &iov, 9);
 105         if (tevent_req_nterror(req, status)) {
 106                 return;
 107         }
 108
 109         data_offset = SVAL(iov[1].iov_base, 2);
 110         state->data_length = IVAL(iov[1].iov_base, 4);
 111
 112         if ((data_offset != SMB2_HDR_BODY + 8) ||
 113             (state->data_length > iov[2].iov_len)) {
 114                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 115                 return;
 116         }
 117
 118         state->recv_iov = iov;
 119         state->data = (uint8_t *)iov[2].iov_base;
 120         tevent_req_done(req);
 121 }
 122
 123 NTSTATUS smb2cli_query_directory_recv(struct tevent_req *req,
 124                                        TALLOC_CTX *mem_ctx,
 125                                        uint8_t **data,
 126                                        uint32_t *data_length)
 127 {
 128         struct smb2cli_query_directory_state *state =
 129                 tevent_req_data(req,
 130                 struct smb2cli_query_directory_state);
 131         NTSTATUS status;
 132
 133         if (tevent_req_is_nterror(req, &status)) {
 134                 return status;
 135         }
 136         talloc_steal(mem_ctx, state->recv_iov);
 137         *data_length = state->data_length;
 138         *data = state->data;
 139         return NT_STATUS_OK;
 140 }
 141
 142 NTSTATUS smb2cli_query_directory(struct cli_state *cli,
 143                                  uint8_t level,
 144                                  uint8_t flags,
 145                                  uint32_t file_index,
 146                                  uint64_t fid_persistent,
 147                                  uint64_t fid_volatile,
 148                                  const char *mask,
 149                                  uint32_t outbuf_len,
 150                                  TALLOC_CTX *mem_ctx,
 151                                  uint8_t **data,
 152                                  uint32_t *data_length)
 153 {
 154         TALLOC_CTX *frame = talloc_stackframe();
 155         struct event_context *ev;
 156         struct tevent_req *req;
 157         NTSTATUS status = NT_STATUS_NO_MEMORY;
 158
 159         if (cli_has_async_calls(cli)) {
 160                 /*
 161                  * Can't use sync call while an async call is in flight
 162                  */
 163                 status = NT_STATUS_INVALID_PARAMETER;
 164                 goto fail;
 165         }
 166         ev = event_context_init(frame);
 167         if (ev == NULL) {
 168                 goto fail;
 169         }
 170         req = smb2cli_query_directory_send(frame, ev, cli, level, flags,
 171                                            file_index, fid_persistent,
 172                                            fid_volatile, mask, outbuf_len);
 173         if (req == NULL) {
 174                 goto fail;
 175         }
 176         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 177                 goto fail;
 178         }
 179         status = smb2cli_query_directory_recv(req, mem_ctx,
 180                                               data, data_length);
 181  fail:
 182         TALLOC_FREE(frame);
 183         return status;
 184 }