source4/libcli/smb2/find.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 client find calls
   5
   6    Copyright (C) Andrew Tridgell 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/raw/libcliraw.h"
  24 #include "libcli/raw/raw_proto.h"
  25 #include "libcli/smb2/smb2.h"
  26 #include "libcli/smb2/smb2_calls.h"
  27
  28 /*
  29   send a find request
  30 */
  31 struct smb2_request *smb2_find_send(struct smb2_tree *tree, struct smb2_find *io)
  32 {
  33         struct smb2_request *req;
  34         NTSTATUS status;
  35
  36         req = smb2_request_init_tree(tree, SMB2_OP_QUERY_DIRECTORY, 0x20, true, 0);
  37         if (req == NULL) return NULL;
  38         req->credit_charge = (MAX(io->in.max_response_size, 1) - 1)/ 65536 + 1;
  39
  40         SCVAL(req->out.body, 0x02, io->in.level);
  41         SCVAL(req->out.body, 0x03, io->in.continue_flags);
  42         SIVAL(req->out.body, 0x04, io->in.file_index);
  43         smb2_push_handle(req->out.body+0x08, &io->in.file.handle);
  44
  45         status = smb2_push_o16s16_string(&req->out, 0x18, io->in.pattern);
  46         if (!NT_STATUS_IS_OK(status)) {
  47                 talloc_free(req);
  48                 return NULL;
  49         }
  50
  51         SIVAL(req->out.body, 0x1C, io->in.max_response_size);
  52
  53         smb2_transport_send(req);
  54
  55         return req;
  56 }
  57
  58
  59 /*
  60   recv a find reply
  61 */
  62 NTSTATUS smb2_find_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx,
  63                            struct smb2_find *io)
  64 {
  65         NTSTATUS status;
  66
  67         if (!smb2_request_receive(req) ||
  68             smb2_request_is_error(req)) {
  69                 return smb2_request_destroy(req);
  70         }
  71
  72         SMB2_CHECK_PACKET_RECV(req, 0x08, true);
  73
  74         status = smb2_pull_o16s32_blob(&req->in, mem_ctx,
  75                                        req->in.body+0x02, &io->out.blob);
  76         if (!NT_STATUS_IS_OK(status)) {
  77                 return status;
  78         }
  79
  80         return smb2_request_destroy(req);
  81 }
  82
  83 /*
  84   sync find request
  85 */
  86 NTSTATUS smb2_find(struct smb2_tree *tree, TALLOC_CTX *mem_ctx,
  87                    struct smb2_find *io)
  88 {
  89         struct smb2_request *req = smb2_find_send(tree, io);
  90         return smb2_find_recv(req, mem_ctx, io);
  91 }
  92
  93
  94 /*
  95   a variant of smb2_find_recv that parses the resulting blob into
  96   smb_search_data structures
  97 */
  98 NTSTATUS smb2_find_level_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx,
  99                               uint8_t level, unsigned int *count,
 100                               union smb_search_data **io)
 101 {
 102         struct smb2_find f;
 103         NTSTATUS status;
 104         DATA_BLOB b;
 105         enum smb_search_data_level smb_level;
 106         unsigned int next_ofs=0;
 107
 108         switch (level) {
 109         case SMB2_FIND_DIRECTORY_INFO:
 110                 smb_level = RAW_SEARCH_DATA_DIRECTORY_INFO;
 111                 break;
 112         case SMB2_FIND_FULL_DIRECTORY_INFO:
 113                 smb_level = RAW_SEARCH_DATA_FULL_DIRECTORY_INFO;
 114                 break;
 115         case SMB2_FIND_BOTH_DIRECTORY_INFO:
 116                 smb_level = RAW_SEARCH_DATA_BOTH_DIRECTORY_INFO;
 117                 break;
 118         case SMB2_FIND_NAME_INFO:
 119                 smb_level = RAW_SEARCH_DATA_NAME_INFO;
 120                 break;
 121         case SMB2_FIND_ID_FULL_DIRECTORY_INFO:
 122                 smb_level = RAW_SEARCH_DATA_ID_FULL_DIRECTORY_INFO;
 123                 break;
 124         case SMB2_FIND_ID_BOTH_DIRECTORY_INFO:
 125                 smb_level = RAW_SEARCH_DATA_ID_BOTH_DIRECTORY_INFO;
 126                 break;
 127         default:
 128                 return NT_STATUS_INVALID_INFO_CLASS;
 129         }
 130
 131         status = smb2_find_recv(req, mem_ctx, &f);
 132         NT_STATUS_NOT_OK_RETURN(status);
 133
 134         b = f.out.blob;
 135         *io = NULL;
 136         *count = 0;
 137
 138         do {
 139                 union smb_search_data *io2;
 140
 141                 io2 = talloc_realloc(mem_ctx, *io, union smb_search_data, (*count)+1);
 142                 if (io2 == NULL) {
 143                         data_blob_free(&f.out.blob);
 144                         talloc_free(*io);
 145                         return NT_STATUS_NO_MEMORY;
 146                 }
 147                 *io = io2;
 148
 149                 status = smb_raw_search_common(*io, smb_level, &b, (*io) + (*count),
 150                                                &next_ofs, STR_UNICODE);
 151
 152                 if (NT_STATUS_IS_OK(status) &&
 153                     next_ofs >= b.length) {
 154                         data_blob_free(&f.out.blob);
 155                         talloc_free(*io);
 156                         return NT_STATUS_INFO_LENGTH_MISMATCH;
 157                 }
 158
 159                 (*count)++;
 160
 161                 b = data_blob_const(b.data+next_ofs, b.length - next_ofs);
 162         } while (NT_STATUS_IS_OK(status) && next_ofs != 0);
 163
 164         data_blob_free(&f.out.blob);
 165
 166         return NT_STATUS_OK;
 167 }
 168
 169 /*
 170   a variant of smb2_find that parses the resulting blob into
 171   smb_search_data structures
 172 */
 173 NTSTATUS smb2_find_level(struct smb2_tree *tree, TALLOC_CTX *mem_ctx,
 174                          struct smb2_find *f,
 175                          unsigned int *count, union smb_search_data **io)
 176 {
 177         struct smb2_request *req;
 178
 179         req = smb2_find_send(tree, f);
 180         return smb2_find_level_recv(req, mem_ctx, f->in.level, count, io);
 181 }