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/*
Unix SMB/CIFS implementation.
Core SMB2 server
Copyright (C) Stefan Metzmacher 2009
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/>.
*/
#include "includes.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
#include "../lib/util/tevent_ntstatus.h"
#include "include/ntioctl.h"
#include "smb2_ioctl_private.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_SMB2
static NTSTATUS fsctl_dfs_get_refers(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct connection_struct *conn,
DATA_BLOB *in_input,
uint32_t in_max_output,
DATA_BLOB *out_output)
{
uint16_t in_max_referral_level;
DATA_BLOB in_file_name_buffer;
char *in_file_name_string;
size_t in_file_name_string_size;
bool ok;
bool overflow = false;
NTSTATUS status;
int dfs_size;
char *dfs_data = NULL;
DATA_BLOB output;
if (!lp_host_msdfs()) {
return NT_STATUS_FS_DRIVER_REQUIRED;
}
if (in_input->length < (2 + 2)) {
return NT_STATUS_INVALID_PARAMETER;
}
in_max_referral_level = SVAL(in_input->data, 0);
in_file_name_buffer.data = in_input->data + 2;
in_file_name_buffer.length = in_input->length - 2;
ok = convert_string_talloc(mem_ctx, CH_UTF16, CH_UNIX,
in_file_name_buffer.data,
in_file_name_buffer.length,
&in_file_name_string,
&in_file_name_string_size);
if (!ok) {
return NT_STATUS_ILLEGAL_CHARACTER;
}
dfs_size = setup_dfs_referral(conn,
in_file_name_string,
in_max_referral_level,
&dfs_data, &status);
if (dfs_size < 0) {
return status;
}
if (dfs_size > in_max_output) {
/*
* TODO: we need a testsuite for this
*/
overflow = true;
dfs_size = in_max_output;
}
output = data_blob_talloc(mem_ctx, (uint8_t *)dfs_data, dfs_size);
SAFE_FREE(dfs_data);
if ((dfs_size > 0) && (output.data == NULL)) {
return NT_STATUS_NO_MEMORY;
}
*out_output = output;
if (overflow) {
return STATUS_BUFFER_OVERFLOW;
}
return NT_STATUS_OK;
}
struct tevent_req *smb2_ioctl_dfs(uint32_t ctl_code,
struct tevent_context *ev,
struct tevent_req *req,
struct smbd_smb2_ioctl_state *state)
{
NTSTATUS status;
switch (ctl_code) {
case FSCTL_DFS_GET_REFERRALS:
status = fsctl_dfs_get_refers(state, ev, state->smbreq->conn,
&state->in_input,
state->in_max_output,
&state->out_output);
if (!tevent_req_nterror(req, status)) {
tevent_req_done(req);
}
return tevent_req_post(req, ev);
break;
default: {
uint8_t *out_data = NULL;
uint32_t out_data_len = 0;
if (state->fsp == NULL) {
status = NT_STATUS_NOT_SUPPORTED;
} else {
status = SMB_VFS_FSCTL(state->fsp,
state,
ctl_code,
state->smbreq->flags2,
state->in_input.data,
state->in_input.length,
&out_data,
state->in_max_output,
&out_data_len);
state->out_output = data_blob_const(out_data, out_data_len);
if (NT_STATUS_IS_OK(status)) {
tevent_req_done(req);
return tevent_req_post(req, ev);
}
}
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
if (IS_IPC(state->smbreq->conn)) {
status = NT_STATUS_FS_DRIVER_REQUIRED;
} else {
status = NT_STATUS_INVALID_DEVICE_REQUEST;
}
}
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
break;
}
}
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
return tevent_req_post(req, ev);
}
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