source3/smbd/smb2_getinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "smbd/globals.h"
  23 #include "../source4/libcli/smb2/smb2_constants.h"
  24
  25 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
  26                                                  struct tevent_context *ev,
  27                                                  struct smbd_smb2_request *smb2req,
  28                                                  uint8_t in_info_type,
  29                                                  uint8_t in_file_info_class,
  30                                                  uint32_t in_output_buffer_length,
  31                                                  DATA_BLOB in_input_buffer,
  32                                                  uint32_t in_additional_information,
  33                                                  uint32_t in_flags,
  34                                                  uint64_t in_file_id_volatile);
  35 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
  36                                        TALLOC_CTX *mem_ctx,
  37                                        DATA_BLOB *out_output_buffer);
  38
  39 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq);
  40 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req)
  41 {
  42         const uint8_t *inhdr;
  43         const uint8_t *inbody;
  44         int i = req->current_idx;
  45         size_t expected_body_size = 0x29;
  46         size_t body_size;
  47         uint8_t in_info_type;
  48         uint8_t in_file_info_class;
  49         uint32_t in_output_buffer_length;
  50         uint16_t in_input_buffer_offset;
  51         uint32_t in_input_buffer_length;
  52         DATA_BLOB in_input_buffer;
  53         uint32_t in_additional_information;
  54         uint32_t in_flags;
  55         uint64_t in_file_id_persistent;
  56         uint64_t in_file_id_volatile;
  57         struct tevent_req *subreq;
  58
  59         inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
  60         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  61                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  62         }
  63
  64         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  65
  66         body_size = SVAL(inbody, 0x00);
  67         if (body_size != expected_body_size) {
  68                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  69         }
  70
  71         in_info_type                    = CVAL(inbody, 0x02);
  72         in_file_info_class              = CVAL(inbody, 0x03);
  73         in_output_buffer_length         = IVAL(inbody, 0x04);
  74         in_input_buffer_offset          = SVAL(inbody, 0x08);
  75         /* 0x0A 2 bytes reserved */
  76         in_input_buffer_length          = IVAL(inbody, 0x0C);
  77         in_additional_information       = IVAL(inbody, 0x10);
  78         in_flags                        = IVAL(inbody, 0x14);
  79         in_file_id_persistent           = BVAL(inbody, 0x18);
  80         in_file_id_volatile             = BVAL(inbody, 0x20);
  81
  82         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  83                 /* This is ok */
  84         } else if (in_input_buffer_offset !=
  85                    (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  86                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  87         }
  88
  89         if (in_input_buffer_length > req->in.vector[i+2].iov_len) {
  90                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  91         }
  92
  93         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  94         in_input_buffer.length = in_input_buffer_length;
  95
  96         if (req->compat_chain_fsp) {
  97                 /* skip check */
  98         } else if (in_file_id_persistent != 0) {
  99                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 100         }
 101
 102         subreq = smbd_smb2_getinfo_send(req,
 103                                         req->conn->smb2.event_ctx,
 104                                         req,
 105                                         in_info_type,
 106                                         in_file_info_class,
 107                                         in_output_buffer_length,
 108                                         in_input_buffer,
 109                                         in_additional_information,
 110                                         in_flags,
 111                                         in_file_id_volatile);
 112         if (subreq == NULL) {
 113                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 114         }
 115         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 116
 117         if (tevent_req_is_in_progress(subreq)) {
 118                 return smbd_smb2_request_pending_queue(req);
 119         }
 120
 121         return NT_STATUS_OK;
 122 }
 123
 124 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 125 {
 126         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 127                                         struct smbd_smb2_request);
 128         int i = req->current_idx;
 129         uint8_t *outhdr;
 130         DATA_BLOB outbody;
 131         DATA_BLOB outdyn;
 132         uint16_t out_output_buffer_offset;
 133         DATA_BLOB out_output_buffer;
 134         NTSTATUS status;
 135         NTSTATUS error; /* transport error */
 136
 137         status = smbd_smb2_getinfo_recv(subreq,
 138                                         req,
 139                                         &out_output_buffer);
 140         TALLOC_FREE(subreq);
 141         if (!NT_STATUS_IS_OK(status)) {
 142                 error = smbd_smb2_request_error(req, status);
 143                 if (!NT_STATUS_IS_OK(error)) {
 144                         smbd_server_connection_terminate(req->conn,
 145                                                          nt_errstr(error));
 146                         return;
 147                 }
 148                 return;
 149         }
 150
 151         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 152
 153         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 154
 155         outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
 156         if (outbody.data == NULL) {
 157                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 158                 if (!NT_STATUS_IS_OK(error)) {
 159                         smbd_server_connection_terminate(req->conn,
 160                                                          nt_errstr(error));
 161                         return;
 162                 }
 163                 return;
 164         }
 165
 166         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 167         SSVAL(outbody.data, 0x02,
 168               out_output_buffer_offset);        /* output buffer offset */
 169         SIVAL(outbody.data, 0x04,
 170               out_output_buffer.length);        /* output buffer length */
 171
 172         outdyn = out_output_buffer;
 173
 174         error = smbd_smb2_request_done(req, outbody, &outdyn);
 175         if (!NT_STATUS_IS_OK(error)) {
 176                 smbd_server_connection_terminate(req->conn,
 177                                                  nt_errstr(error));
 178                 return;
 179         }
 180 }
 181
 182 struct smbd_smb2_getinfo_state {
 183         struct smbd_smb2_request *smb2req;
 184         NTSTATUS status;
 185         DATA_BLOB out_output_buffer;
 186 };
 187
 188 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 189                                                  struct tevent_context *ev,
 190                                                  struct smbd_smb2_request *smb2req,
 191                                                  uint8_t in_info_type,
 192                                                  uint8_t in_file_info_class,
 193                                                  uint32_t in_output_buffer_length,
 194                                                  DATA_BLOB in_input_buffer,
 195                                                  uint32_t in_additional_information,
 196                                                  uint32_t in_flags,
 197                                                  uint64_t in_file_id_volatile)
 198 {
 199         struct tevent_req *req;
 200         struct smbd_smb2_getinfo_state *state;
 201         struct smb_request *smbreq;
 202         connection_struct *conn = smb2req->tcon->compat_conn;
 203         files_struct *fsp;
 204
 205         req = tevent_req_create(mem_ctx, &state,
 206                                 struct smbd_smb2_getinfo_state);
 207         if (req == NULL) {
 208                 return NULL;
 209         }
 210         state->smb2req = smb2req;
 211         state->status = NT_STATUS_INTERNAL_ERROR;
 212         state->out_output_buffer = data_blob_null;
 213
 214         DEBUG(10,("smbd_smb2_getinfo_send: file_id[0x%016llX]\n",
 215                   (unsigned long long)in_file_id_volatile));
 216
 217         smbreq = smbd_smb2_fake_smb_request(smb2req);
 218         if (tevent_req_nomem(smbreq, req)) {
 219                 return tevent_req_post(req, ev);
 220         }
 221
 222         fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 223         if (fsp == NULL) {
 224                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 225                 return tevent_req_post(req, ev);
 226         }
 227         if (conn != fsp->conn) {
 228                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 229                 return tevent_req_post(req, ev);
 230         }
 231         if (smb2req->session->vuid != fsp->vuid) {
 232                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 233                 return tevent_req_post(req, ev);
 234         }
 235
 236         tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
 237         return tevent_req_post(req, ev);
 238 }
 239
 240 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 241                                        TALLOC_CTX *mem_ctx,
 242                                        DATA_BLOB *out_output_buffer)
 243 {
 244         NTSTATUS status;
 245         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 246                                                 struct smbd_smb2_getinfo_state);
 247
 248         if (tevent_req_is_nterror(req, &status)) {
 249                 tevent_req_received(req);
 250                 return status;
 251         }
 252
 253         *out_output_buffer = state->out_output_buffer;
 254         talloc_steal(mem_ctx, out_output_buffer->data);
 255
 256         tevent_req_received(req);
 257         return NT_STATUS_OK;
 258 }