libcli/smb/smb2cli_query_info.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    smb2 lib
   4    Copyright (C) Stefan Metzmacher 2012
   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 "system/network.h"
  22 #include "lib/util/tevent_ntstatus.h"
  23 #include "smb_common.h"
  24 #include "smbXcli_base.h"
  25
  26 struct smb2cli_query_info_state {
  27         uint8_t fixed[0x28];
  28         uint8_t dyn_pad[1];
  29         uint32_t max_output_length;
  30         struct iovec *recv_iov;
  31         DATA_BLOB out_output_buffer;
  32 };
  33
  34 static void smb2cli_query_info_done(struct tevent_req *subreq);
  35
  36 struct tevent_req *smb2cli_query_info_send(TALLOC_CTX *mem_ctx,
  37                                            struct tevent_context *ev,
  38                                            struct smbXcli_conn *conn,
  39                                            uint32_t timeout_msec,
  40                                            struct smbXcli_session *session,
  41                                            struct smbXcli_tcon *tcon,
  42                                            uint8_t in_info_type,
  43                                            uint8_t in_file_info_class,
  44                                            uint32_t in_max_output_length,
  45                                            const DATA_BLOB *in_input_buffer,
  46                                            uint32_t in_additional_info,
  47                                            uint32_t in_flags,
  48                                            uint64_t in_fid_persistent,
  49                                            uint64_t in_fid_volatile)
  50 {
  51         struct tevent_req *req, *subreq;
  52         struct smb2cli_query_info_state *state;
  53         uint8_t *fixed;
  54         uint8_t *dyn;
  55         size_t dyn_len;
  56         uint16_t input_buffer_offset = 0;
  57         uint32_t input_buffer_length = 0;
  58         uint32_t tcon_id = 0;
  59
  60         req = tevent_req_create(mem_ctx, &state,
  61                                 struct smb2cli_query_info_state);
  62         if (req == NULL) {
  63                 return NULL;
  64         }
  65         state->max_output_length = in_max_output_length;
  66
  67         if (in_input_buffer) {
  68                 input_buffer_offset = SMB2_HDR_BODY+0x28;
  69                 input_buffer_length = in_input_buffer->length;
  70         }
  71
  72         fixed = state->fixed;
  73
  74         SSVAL(fixed, 0x00, 0x29);
  75         SCVAL(fixed, 0x02, in_info_type);
  76         SCVAL(fixed, 0x03, in_file_info_class); /* reserved */
  77         SIVAL(fixed, 0x04, in_max_output_length);
  78         SSVAL(fixed, 0x08, input_buffer_offset);
  79         SSVAL(fixed, 0x0A, 0); /* reserved */
  80         SIVAL(fixed, 0x0C, input_buffer_length);
  81         SIVAL(fixed, 0x10, in_additional_info);
  82         SIVAL(fixed, 0x14, in_flags);
  83         SBVAL(fixed, 0x18, in_fid_persistent);
  84         SBVAL(fixed, 0x20, in_fid_volatile);
  85
  86         if (input_buffer_length > 0) {
  87                 dyn = in_input_buffer->data;
  88                 dyn_len = in_input_buffer->length;
  89         } else {
  90                 dyn = state->dyn_pad;
  91                 dyn_len = sizeof(state->dyn_pad);
  92         }
  93
  94         if (tcon) {
  95                 tcon_id = smb2cli_tcon_current_id(tcon);
  96         }
  97
  98         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_GETINFO,
  99                                   0, 0, /* flags */
 100                                   timeout_msec,
 101                                   0xFEFF, /* pid */
 102                                   tcon_id,
 103                                   session,
 104                                   state->fixed, sizeof(state->fixed),
 105                                   dyn, dyn_len);
 106         if (tevent_req_nomem(subreq, req)) {
 107                 return tevent_req_post(req, ev);
 108         }
 109         tevent_req_set_callback(subreq, smb2cli_query_info_done, req);
 110         return req;
 111 }
 112
 113 static void smb2cli_query_info_done(struct tevent_req *subreq)
 114 {
 115         struct tevent_req *req =
 116                 tevent_req_callback_data(subreq,
 117                 struct tevent_req);
 118         struct smb2cli_query_info_state *state =
 119                 tevent_req_data(req,
 120                 struct smb2cli_query_info_state);
 121         NTSTATUS status;
 122         struct iovec *iov;
 123         uint8_t *fixed;
 124         uint8_t *dyn;
 125         size_t dyn_len;
 126         uint32_t dyn_ofs = SMB2_HDR_BODY + 0x08;
 127         uint32_t output_buffer_offset;
 128         uint32_t output_buffer_length;
 129         static const struct smb2cli_req_expected_response expected[] = {
 130         {
 131                 .status = NT_STATUS_OK,
 132                 .body_size = 0x09
 133         },
 134         {
 135                 .status = STATUS_BUFFER_OVERFLOW,
 136                 .body_size = 0x09
 137         }
 138         };
 139
 140         status = smb2cli_req_recv(subreq, state, &iov,
 141                                   expected, ARRAY_SIZE(expected));
 142         if (tevent_req_nterror(req, status)) {
 143                 return;
 144         }
 145
 146         state->recv_iov = iov;
 147         fixed = (uint8_t *)iov[1].iov_base;
 148         dyn = (uint8_t *)iov[2].iov_base;
 149         dyn_len = iov[2].iov_len;
 150
 151         output_buffer_offset = SVAL(fixed, 0x02);
 152         output_buffer_length = IVAL(fixed, 0x04);
 153
 154         if ((output_buffer_offset > 0) && (output_buffer_length > 0)) {
 155                 if (output_buffer_offset != dyn_ofs) {
 156                         tevent_req_nterror(
 157                                 req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 158                         return;
 159                 }
 160
 161                 if (output_buffer_length < dyn_len) {
 162                         tevent_req_nterror(
 163                                 req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 164                         return;
 165                 }
 166
 167                 if (output_buffer_length > state->max_output_length) {
 168                         tevent_req_nterror(
 169                                 req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 170                         return;
 171                 }
 172
 173                 state->out_output_buffer.data = dyn;
 174                 state->out_output_buffer.length = output_buffer_length;
 175         }
 176
 177         tevent_req_done(req);
 178 }
 179
 180 NTSTATUS smb2cli_query_info_recv(struct tevent_req *req,
 181                                  TALLOC_CTX *mem_ctx,
 182                                  DATA_BLOB *out_output_buffer)
 183 {
 184         struct smb2cli_query_info_state *state =
 185                 tevent_req_data(req,
 186                 struct smb2cli_query_info_state);
 187         NTSTATUS status;
 188
 189         if (tevent_req_is_nterror(req, &status)) {
 190                 tevent_req_received(req);
 191                 return status;
 192         }
 193
 194         talloc_steal(mem_ctx, state->recv_iov);
 195         if (out_output_buffer) {
 196                 *out_output_buffer = state->out_output_buffer;
 197         }
 198
 199         tevent_req_received(req);
 200         return NT_STATUS_OK;
 201 }
 202
 203 NTSTATUS smb2cli_query_info(struct smbXcli_conn *conn,
 204                             uint32_t timeout_msec,
 205                             struct smbXcli_session *session,
 206                             struct smbXcli_tcon *tcon,
 207                             uint8_t in_info_type,
 208                             uint8_t in_file_info_class,
 209                             uint32_t in_max_output_length,
 210                             const DATA_BLOB *in_input_buffer,
 211                             uint32_t in_additional_info,
 212                             uint32_t in_flags,
 213                             uint64_t in_fid_persistent,
 214                             uint64_t in_fid_volatile,
 215                             TALLOC_CTX *mem_ctx,
 216                             DATA_BLOB *out_output_buffer)
 217 {
 218         TALLOC_CTX *frame = talloc_stackframe();
 219         struct tevent_context *ev;
 220         struct tevent_req *req;
 221         NTSTATUS status = NT_STATUS_NO_MEMORY;
 222
 223         if (smbXcli_conn_has_async_calls(conn)) {
 224                 /*
 225                  * Can't use sync call while an async call is in flight
 226                  */
 227                 status = NT_STATUS_INVALID_PARAMETER_MIX;
 228                 goto fail;
 229         }
 230         ev = tevent_context_init(frame);
 231         if (ev == NULL) {
 232                 goto fail;
 233         }
 234         req = smb2cli_query_info_send(frame, ev,
 235                                       conn, timeout_msec,
 236                                       session, tcon,
 237                                       in_info_type,
 238                                       in_file_info_class,
 239                                       in_max_output_length,
 240                                       in_input_buffer,
 241                                       in_additional_info,
 242                                       in_flags,
 243                                       in_fid_persistent,
 244                                       in_fid_volatile);
 245         if (req == NULL) {
 246                 goto fail;
 247         }
 248         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 249                 goto fail;
 250         }
 251         status = smb2cli_query_info_recv(req, mem_ctx,
 252                                          out_output_buffer);
 253  fail:
 254         TALLOC_FREE(frame);
 255         return status;
 256 }