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 "../libcli/smb/smbXcli_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 smbXcli_conn *conn,
  41                                                 uint32_t timeout_msec,
  42                                                 struct smbXcli_session *session,
  43                                                 uint32_t tcon_id,
  44                                                 uint8_t level,
  45                                                 uint8_t flags,
  46                                                 uint32_t file_index,
  47                                                 uint64_t fid_persistent,
  48                                                 uint64_t fid_volatile,
  49                                                 const char *mask,
  50                                                 uint32_t outbuf_len)
  51 {
  52         struct tevent_req *req, *subreq;
  53         struct smb2cli_query_directory_state *state;
  54         uint8_t *fixed;
  55         uint8_t *dyn;
  56         size_t dyn_len;
  57
  58         req = tevent_req_create(mem_ctx, &state,
  59                                 struct smb2cli_query_directory_state);
  60         if (req == NULL) {
  61                 return NULL;
  62         }
  63
  64         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  65                                    mask, strlen(mask),
  66                                    &dyn, &dyn_len)) {
  67                 tevent_req_oom(req);
  68                 return tevent_req_post(req, ev);
  69         }
  70
  71         if (strlen(mask) == 0) {
  72                 TALLOC_FREE(dyn);
  73                 dyn_len = 0;
  74         }
  75
  76         fixed = state->fixed;
  77         SSVAL(fixed, 0, 33);
  78         SCVAL(fixed, 2, level);
  79         SCVAL(fixed, 3, flags);
  80         SIVAL(fixed, 4, file_index);
  81         SBVAL(fixed, 8, fid_persistent);
  82         SBVAL(fixed, 16, fid_volatile);
  83         SSVAL(fixed, 24, SMB2_HDR_BODY + 32);
  84         SSVAL(fixed, 26, dyn_len);
  85         SSVAL(fixed, 28, outbuf_len);
  86
  87         if (dyn_len == 0) {
  88                 dyn = state->dyn_pad;
  89                 dyn_len = sizeof(state->dyn_pad);
  90         }
  91
  92         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_FIND,
  93                                   0, 0, /* flags */
  94                                   timeout_msec,
  95                                   0xFEFF, /* pid */
  96                                   tcon_id,
  97                                   session,
  98                                   state->fixed, sizeof(state->fixed),
  99                                   dyn, dyn_len);
 100         if (tevent_req_nomem(subreq, req)) {
 101                 return tevent_req_post(req, ev);
 102         }
 103         tevent_req_set_callback(subreq, smb2cli_query_directory_done, req);
 104         return req;
 105 }
 106
 107 static void smb2cli_query_directory_done(struct tevent_req *subreq)
 108 {
 109         struct tevent_req *req =
 110                 tevent_req_callback_data(subreq,
 111                 struct tevent_req);
 112         struct smb2cli_query_directory_state *state =
 113                 tevent_req_data(req,
 114                 struct smb2cli_query_directory_state);
 115         NTSTATUS status;
 116         struct iovec *iov;
 117         uint16_t data_offset;
 118         static const struct smb2cli_req_expected_response expected[] = {
 119         {
 120                 .status = NT_STATUS_OK,
 121                 .body_size = 0x09
 122         }
 123         };
 124
 125         status = smb2cli_req_recv(subreq, state, &iov,
 126                                   expected, ARRAY_SIZE(expected));
 127         if (tevent_req_nterror(req, status)) {
 128                 return;
 129         }
 130
 131         data_offset = SVAL(iov[1].iov_base, 2);
 132         state->data_length = IVAL(iov[1].iov_base, 4);
 133
 134         if ((data_offset != SMB2_HDR_BODY + 8) ||
 135             (state->data_length > iov[2].iov_len)) {
 136                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 137                 return;
 138         }
 139
 140         state->recv_iov = iov;
 141         state->data = (uint8_t *)iov[2].iov_base;
 142         tevent_req_done(req);
 143 }
 144
 145 NTSTATUS smb2cli_query_directory_recv(struct tevent_req *req,
 146                                        TALLOC_CTX *mem_ctx,
 147                                        uint8_t **data,
 148                                        uint32_t *data_length)
 149 {
 150         struct smb2cli_query_directory_state *state =
 151                 tevent_req_data(req,
 152                 struct smb2cli_query_directory_state);
 153         NTSTATUS status;
 154
 155         if (tevent_req_is_nterror(req, &status)) {
 156                 return status;
 157         }
 158         talloc_steal(mem_ctx, state->recv_iov);
 159         *data_length = state->data_length;
 160         *data = state->data;
 161         return NT_STATUS_OK;
 162 }
 163
 164 NTSTATUS smb2cli_query_directory(struct smbXcli_conn *conn,
 165                                  uint32_t timeout_msec,
 166                                  struct smbXcli_session *session,
 167                                  uint32_t tcon_id,
 168                                  uint8_t level,
 169                                  uint8_t flags,
 170                                  uint32_t file_index,
 171                                  uint64_t fid_persistent,
 172                                  uint64_t fid_volatile,
 173                                  const char *mask,
 174                                  uint32_t outbuf_len,
 175                                  TALLOC_CTX *mem_ctx,
 176                                  uint8_t **data,
 177                                  uint32_t *data_length)
 178 {
 179         TALLOC_CTX *frame = talloc_stackframe();
 180         struct event_context *ev;
 181         struct tevent_req *req;
 182         NTSTATUS status = NT_STATUS_NO_MEMORY;
 183
 184         if (smbXcli_conn_has_async_calls(conn)) {
 185                 /*
 186                  * Can't use sync call while an async call is in flight
 187                  */
 188                 status = NT_STATUS_INVALID_PARAMETER;
 189                 goto fail;
 190         }
 191         ev = event_context_init(frame);
 192         if (ev == NULL) {
 193                 goto fail;
 194         }
 195         req = smb2cli_query_directory_send(frame, ev, conn, timeout_msec,
 196                                            session, tcon_id, level, flags,
 197                                            file_index, fid_persistent,
 198                                            fid_volatile, mask, outbuf_len);
 199         if (req == NULL) {
 200                 goto fail;
 201         }
 202         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 203                 goto fail;
 204         }
 205         status = smb2cli_query_directory_recv(req, mem_ctx,
 206                                               data, data_length);
 207  fail:
 208         TALLOC_FREE(frame);
 209         return status;
 210 }