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/*
Unix SMB/CIFS implementation.
SMB2 Find
Copyright (C) Andrew Tridgell 2003
Copyright (c) Stefan Metzmacher 2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
This file handles the parsing of transact2 requests
*/
#include "includes.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
#include "smb_server/smb_server.h"
#include "smb_server/service_smb_proto.h"
#include "smb_server/smb2/smb2_server.h"
#include "ntvfs/ntvfs.h"
/* a structure to encapsulate the state information about an in-progress ffirst/fnext operation */
struct smb2srv_find_state {
struct smb2srv_request *req;
struct smb2_find *info;
union smb_search_first *ff;
union smb_search_next *fn;
uint32_t last_entry_offset;
};
/* callback function for SMB2 Find */
static bool smb2srv_find_callback(void *private_data, const union smb_search_data *file)
{
struct smb2srv_find_state *state = talloc_get_type(private_data, struct smb2srv_find_state);
struct smb2_find *info = state->info;
uint32_t old_length;
NTSTATUS status;
old_length = info->out.blob.length;
status = smbsrv_push_passthru_search(state, &info->out.blob, info->data_level, file, STR_UNICODE);
if (!NT_STATUS_IS_OK(status) ||
info->out.blob.length > info->in.max_response_size) {
/* restore the old length and tell the backend to stop */
smbsrv_blob_grow_data(state, &info->out.blob, old_length);
return false;
}
state->last_entry_offset = old_length;
return true;
}
static void smb2srv_find_send(struct ntvfs_request *ntvfs)
{
struct smb2srv_request *req;
struct smb2srv_find_state *state;
SMB2SRV_CHECK_ASYNC_STATUS(state, struct smb2srv_find_state);
SMB2SRV_CHECK(smb2srv_setup_reply(req, 0x08, true, state->info->out.blob.length));
if (state->info->out.blob.length > 0) {
SIVAL(state->info->out.blob.data + state->last_entry_offset, 0, 0);
}
SMB2SRV_CHECK(smb2_push_o16s32_blob(&req->out, 0x02, state->info->out.blob));
smb2srv_send_reply(req);
}
static NTSTATUS smb2srv_find_backend(struct smb2srv_find_state *state)
{
struct smb2_find *info = state->info;
switch (info->in.level) {
case SMB2_FIND_DIRECTORY_INFO:
info->data_level = RAW_SEARCH_DATA_DIRECTORY_INFO;
break;
case SMB2_FIND_FULL_DIRECTORY_INFO:
info->data_level = RAW_SEARCH_DATA_FULL_DIRECTORY_INFO;
break;
case SMB2_FIND_BOTH_DIRECTORY_INFO:
info->data_level = RAW_SEARCH_DATA_BOTH_DIRECTORY_INFO;
break;
case SMB2_FIND_NAME_INFO:
info->data_level = RAW_SEARCH_DATA_NAME_INFO;
break;
case SMB2_FIND_ID_BOTH_DIRECTORY_INFO:
info->data_level = RAW_SEARCH_DATA_ID_BOTH_DIRECTORY_INFO;
break;
case SMB2_FIND_ID_FULL_DIRECTORY_INFO:
info->data_level = RAW_SEARCH_DATA_ID_FULL_DIRECTORY_INFO;
break;
default:
return NT_STATUS_FOOBAR;
}
if (info->in.continue_flags & SMB2_CONTINUE_FLAG_REOPEN) {
state->ff = talloc(state, union smb_search_first);
NT_STATUS_HAVE_NO_MEMORY(state->ff);
state->ff->smb2 = *info;
state->info = &state->ff->smb2;
ZERO_STRUCT(state->ff->smb2.out);
return ntvfs_search_first(state->req->ntvfs, state->ff, state, smb2srv_find_callback);
} else {
state->fn = talloc(state, union smb_search_next);
NT_STATUS_HAVE_NO_MEMORY(state->fn);
state->fn->smb2 = *info;
state->info = &state->fn->smb2;
ZERO_STRUCT(state->fn->smb2.out);
return ntvfs_search_next(state->req->ntvfs, state->fn, state, smb2srv_find_callback);
}
/* should not be reached */
return NT_STATUS_INTERNAL_ERROR;
}
void smb2srv_find_recv(struct smb2srv_request *req)
{
struct smb2srv_find_state *state;
struct smb2_find *info;
SMB2SRV_CHECK_BODY_SIZE(req, 0x20, true);
SMB2SRV_TALLOC_IO_PTR(info, struct smb2_find);
/* this overwrites req->io_ptr !*/
SMB2SRV_TALLOC_IO_PTR(state, struct smb2srv_find_state);
state->req = req;
state->info = info;
state->ff = NULL;
state->fn = NULL;
state->last_entry_offset= 0;
SMB2SRV_SETUP_NTVFS_REQUEST(smb2srv_find_send, NTVFS_ASYNC_STATE_MAY_ASYNC);
info->level = RAW_SEARCH_SMB2;
info->data_level = RAW_SEARCH_DATA_GENERIC;/* will be overwritten later */
info->in.level = CVAL(req->in.body, 0x02);
info->in.continue_flags = CVAL(req->in.body, 0x03);
info->in.file_index = IVAL(req->in.body, 0x04);
info->in.file.ntvfs = smb2srv_pull_handle(req, req->in.body, 0x08);
SMB2SRV_CHECK(smb2_pull_o16s16_string(&req->in, info, req->in.body+0x18, &info->in.pattern));
info->in.max_response_size = IVAL(req->in.body, 0x1C);
/* the VFS backend does not yet handle NULL patterns */
if (info->in.pattern == NULL) {
info->in.pattern = "";
}
SMB2SRV_CHECK_FILE_HANDLE(info->in.file.ntvfs);
SMB2SRV_CALL_NTVFS_BACKEND(smb2srv_find_backend(state));
}
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