source4/smb_server/search.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMBsearch handling
   4    Copyright (C) Andrew Tridgell 2003
   5    Copyright (C) James J Myers 2003 <myersjj@samba.org>
   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 2 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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21 /*
  22    This file handles the parsing of transact2 requests
  23 */
  24
  25 #include "includes.h"
  26
  27 /* check req->async.status and if not OK then send an error reply */
  28 #define CHECK_ASYNC_STATUS do { \
  29         if (!NT_STATUS_IS_OK(req->async.status)) { \
  30                 req_reply_error(req, req->async.status); \
  31                 return; \
  32         }} while (0)
  33
  34 /*
  35    check if the backend wants to handle the request asynchronously.
  36    if it wants it handled synchronously then call the send function
  37    immediately
  38 */
  39 #define REQ_ASYNC_TAIL do { \
  40         if (!(req->control_flags & REQ_CONTROL_ASYNC)) { \
  41                 req->async.send_fn(req); \
  42         }} while (0)
  43
  44 /* useful wrapper for talloc with NO_MEMORY reply */
  45 #define REQ_TALLOC(ptr, size) do { \
  46         ptr = talloc(req->mem_ctx, size); \
  47         if (!ptr) { \
  48                 req_reply_error(req, NT_STATUS_NO_MEMORY); \
  49                 return; \
  50         }} while (0)
  51
  52 #define CHECK_MIN_BLOB_SIZE(blob, size) do { \
  53         if ((blob)->length < (size)) { \
  54                 return NT_STATUS_INFO_LENGTH_MISMATCH; \
  55         }} while (0)
  56
  57 /* a structure to encapsulate the state information about
  58  * an in-progress search first/next operation */
  59 struct search_state {
  60         struct request_context *req;
  61         union smb_search_data *file;
  62         uint16_t last_entry_offset;
  63 };
  64
  65 /*
  66   fill a single entry in a search find reply
  67 */
  68 static void find_fill_info(struct request_context *req,
  69                            union smb_search_data *file)
  70 {
  71         char *p = req->out.data + req->out.data_size;
  72         uint32_t dos_date;
  73         char search_name[13];
  74
  75         DEBUG(9,("find_fill_info: input file data: attr=0x%x size=%u time=0x%x name=%13s\n",
  76                 file->search.attrib, file->search.size,
  77                 (uint32_t)file->search.write_time, file->search.name));
  78
  79         p += req_append_bytes(req, file->search.search_id.data, 21);
  80         p += req_append_bytes(req, (char*)&file->search.attrib, 1);
  81         srv_push_dos_date3(req->smb_ctx, (uint8_t *)&dos_date, 0, file->search.write_time);
  82         p += req_append_bytes(req, (char*)&dos_date, 4);
  83         p += req_append_bytes(req, (char*)&file->search.size, 4);
  84         memset(&search_name[0], ' ', 13);
  85         memcpy(&search_name[0], file->search.name,
  86                 MAX(13, strlen(file->search.name)));
  87         p += req_append_bytes(req, &search_name[0], 13);
  88 }
  89
  90 /* callback function for search first/next */
  91 static BOOL find_callback(void *private, union smb_search_data *file)
  92 {
  93         struct search_state *state = (struct search_state *)private;
  94
  95         find_fill_info(state->req, file);
  96
  97         return True;
  98 }
  99
 100 /****************************************************************************
 101  Reply to a search.
 102 ****************************************************************************/
 103 void reply_search(struct request_context *req)
 104 {
 105         union smb_search_first *sf;
 106         union smb_search_next *sn;
 107         DATA_BLOB resume_key;
 108         uint16_t resume_key_length;
 109         struct search_state state;
 110         char *p;
 111
 112         REQ_TALLOC(sf, sizeof(*sf));
 113
 114         /* parse request */
 115         if (req->in.wct != 2) {
 116                 req_reply_error(req, NT_STATUS_INVALID_PARAMETER);
 117                 return;
 118         }
 119
 120         p = req->in.data;
 121         p += req_pull_ascii4(req, &sf->search_first.in.pattern,
 122                 p, STR_TERMINATE);
 123         if (!sf->search_first.in.pattern) {
 124                 req_reply_error(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 125                 return;
 126         }
 127         /* pull in type 5 byte and length */
 128         if (!req_pull_blob(req, p, 3, &resume_key))
 129                 req_reply_error(req, NT_STATUS_INVALID_PARAMETER);
 130         resume_key_length = SVAL(resume_key.data, 1);
 131         p += 3;
 132         DEBUG(19,("reply_search: pattern=%s, key_length=%d\n",
 133                 sf->search_first.in.pattern, resume_key_length));
 134
 135         /* setup state for callback */
 136         state.req = req;
 137         state.file = NULL;
 138         state.last_entry_offset = 0;
 139
 140         /* construct reply */
 141         req_setup_reply(req, 1, 0);
 142         req_append_var_block(req, NULL, 0);
 143
 144         if (resume_key_length > 0) {
 145                 /* do a search next operation */
 146                 REQ_TALLOC(sn, sizeof(*sn));
 147                 sn->search_next.level = RAW_SEARCH_SEARCH;
 148                 req->async.private = sn;
 149                 if (!req_pull_blob(req, req->in.data, resume_key_length,
 150                                 &(sn->search_next.in.search_id)))
 151                         req_reply_error(req, NT_STATUS_INVALID_PARAMETER);
 152                 sn->search_next.in.search_attrib = SVAL(req->in.vwv, VWV(1));
 153                 sn->search_next.in.max_count     = SVAL(req->in.vwv, VWV(0));
 154
 155                 /* call backend */
 156                 req->async.status = req->conn->ntvfs_ops->search_next(req,
 157                         sn, &state, find_callback);
 158                 SSVAL(req->out.vwv, VWV(0), sn->search_next.out.count);
 159         } else {
 160                 /* do a search first operation */
 161                 req->async.private = sf;
 162                 sf->search_first.level = RAW_SEARCH_SEARCH;
 163                 sf->search_first.in.search_attrib = SVAL(req->in.vwv, VWV(1));
 164                 sf->search_first.in.max_count     = SVAL(req->in.vwv, VWV(0));
 165
 166                 /* call backend */
 167                 req->async.status = req->conn->ntvfs_ops->search_first(req,
 168                         sf, &state, find_callback);
 169                 SSVAL(req->out.vwv, VWV(0), sf->search_first.out.count);
 170         }
 171
 172         req_send_reply(req);
 173 }
 174
 175
 176 /****************************************************************************
 177  Reply to a fclose (async reply)
 178 ****************************************************************************/
 179 static void reply_fclose_send(struct request_context *req)
 180 {
 181         CHECK_ASYNC_STATUS;
 182
 183         /* construct reply */
 184         req_setup_reply(req, 1, 0);
 185
 186         req_send_reply(req);
 187 }
 188
 189
 190 /****************************************************************************
 191  Reply to fclose (stop directory search).
 192 ****************************************************************************/
 193 void reply_fclose(struct request_context *req)
 194 {
 195         union smb_search_next *sn;
 196         DATA_BLOB resume_key;
 197         uint16_t resume_key_length;
 198
 199         REQ_TALLOC(sn, sizeof(*sn));
 200
 201         /* parse request */
 202         if (req->in.wct != 2) {
 203                 req_reply_error(req, NT_STATUS_INVALID_PARAMETER);
 204                 return;
 205         }
 206
 207         sn->search_next.level = RAW_SEARCH_FCLOSE;
 208
 209         /* pull in type 5 byte and length */
 210         if (!req_pull_blob(req, req->in.data, 3, &resume_key))
 211                 req_reply_error(req, NT_STATUS_INVALID_PARAMETER);
 212         resume_key_length = SVAL(resume_key.data, 1);
 213         if (resume_key_length > 0) {
 214                 /* do a search close operation */
 215                 if (!req_pull_blob(req, req->in.data, resume_key_length,
 216                                 &(sn->search_next.in.search_id)))
 217                         req_reply_error(req, NT_STATUS_INVALID_PARAMETER);
 218         } else
 219                 req_reply_error(req, NT_STATUS_INVALID_PARAMETER);
 220
 221         req->async.send_fn = reply_fclose_send;
 222         req->async.private = sn;
 223
 224         /* call backend */
 225         req->async.status = req->conn->ntvfs_ops->search_next(req, sn,
 226                 NULL, NULL);
 227
 228         REQ_ASYNC_TAIL;
 229 }