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samba-mirror/libcli/smb/smb2cli_ioctl.c
Stefan Metzmacher 4ea37dd521 libcli/smb: make use of samba_tevent_context_init()
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
2013-02-19 23:47:44 +01:00

336 lines
8.8 KiB
C

/*
Unix SMB/CIFS implementation.
smb2 lib
Copyright (C) Stefan Metzmacher 2011
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 "system/network.h"
#include "lib/util/tevent_ntstatus.h"
#include "smb_common.h"
#include "smbXcli_base.h"
#include "librpc/ndr/libndr.h"
struct smb2cli_ioctl_state {
uint8_t fixed[0x38];
uint8_t dyn_pad[1];
uint32_t max_input_length;
uint32_t max_output_length;
struct iovec *recv_iov;
DATA_BLOB out_input_buffer;
DATA_BLOB out_output_buffer;
};
static void smb2cli_ioctl_done(struct tevent_req *subreq);
struct tevent_req *smb2cli_ioctl_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon,
uint64_t in_fid_persistent,
uint64_t in_fid_volatile,
uint32_t in_ctl_code,
uint32_t in_max_input_length,
const DATA_BLOB *in_input_buffer,
uint32_t in_max_output_length,
const DATA_BLOB *in_output_buffer,
uint32_t in_flags)
{
struct tevent_req *req, *subreq;
struct smb2cli_ioctl_state *state;
uint8_t *fixed;
uint8_t *dyn;
size_t dyn_len;
uint32_t input_buffer_offset = 0;
uint32_t input_buffer_length = 0;
uint32_t output_buffer_offset = 0;
uint32_t output_buffer_length = 0;
uint32_t pad_length = 0;
req = tevent_req_create(mem_ctx, &state,
struct smb2cli_ioctl_state);
if (req == NULL) {
return NULL;
}
state->max_input_length = in_max_input_length;
state->max_output_length = in_max_output_length;
if (in_input_buffer) {
input_buffer_offset = SMB2_HDR_BODY+0x38;
input_buffer_length = in_input_buffer->length;
}
if (in_output_buffer) {
output_buffer_offset = SMB2_HDR_BODY+0x38;
output_buffer_length = in_output_buffer->length;
if (input_buffer_length > 0 && output_buffer_length > 0) {
uint32_t tmp;
output_buffer_offset += input_buffer_length;
tmp = output_buffer_offset;
output_buffer_offset = NDR_ROUND(output_buffer_offset, 8);
pad_length = output_buffer_offset - tmp;
}
}
fixed = state->fixed;
SSVAL(fixed, 0x00, 0x39);
SSVAL(fixed, 0x02, 0); /* reserved */
SIVAL(fixed, 0x04, in_ctl_code);
SBVAL(fixed, 0x08, in_fid_persistent);
SBVAL(fixed, 0x10, in_fid_volatile);
SIVAL(fixed, 0x18, input_buffer_offset);
SIVAL(fixed, 0x1C, input_buffer_length);
SIVAL(fixed, 0x20, in_max_input_length);
SIVAL(fixed, 0x24, output_buffer_offset);
SIVAL(fixed, 0x28, output_buffer_length);
SIVAL(fixed, 0x2C, in_max_output_length);
SIVAL(fixed, 0x30, in_flags);
SIVAL(fixed, 0x34, 0); /* reserved */
if (input_buffer_length > 0 && output_buffer_length > 0) {
size_t avail = UINT32_MAX - (input_buffer_length + pad_length);
size_t ofs = output_buffer_offset - input_buffer_offset;
if (avail < output_buffer_length) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
return tevent_req_post(req, ev);
}
dyn_len = input_buffer_length + output_buffer_length + pad_length;
dyn = talloc_zero_array(state, uint8_t, dyn_len);
if (tevent_req_nomem(dyn, req)) {
return tevent_req_post(req, ev);
}
memcpy(dyn, in_input_buffer->data,
in_input_buffer->length);
memcpy(dyn + ofs, in_output_buffer->data,
in_output_buffer->length);
} else if (input_buffer_length > 0) {
dyn = in_input_buffer->data;
dyn_len = in_input_buffer->length;
} else if (output_buffer_length > 0) {
dyn = in_output_buffer->data;
dyn_len = in_output_buffer->length;
} else {
dyn = state->dyn_pad;
dyn_len = sizeof(state->dyn_pad);
}
subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_IOCTL,
0, 0, /* flags */
timeout_msec,
tcon,
session,
state->fixed, sizeof(state->fixed),
dyn, dyn_len);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, smb2cli_ioctl_done, req);
return req;
}
static void smb2cli_ioctl_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct smb2cli_ioctl_state *state =
tevent_req_data(req,
struct smb2cli_ioctl_state);
NTSTATUS status;
struct iovec *iov;
uint8_t *fixed;
uint8_t *dyn;
size_t dyn_len;
uint32_t dyn_ofs = SMB2_HDR_BODY + 0x30;
uint32_t input_buffer_offset;
uint32_t input_buffer_length;
uint32_t output_buffer_offset;
uint32_t output_buffer_length;
static const struct smb2cli_req_expected_response expected[] = {
{
.status = NT_STATUS_OK,
.body_size = 0x31
},
{
.status = STATUS_BUFFER_OVERFLOW,
.body_size = 0x31
}
};
status = smb2cli_req_recv(subreq, state, &iov,
expected, ARRAY_SIZE(expected));
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
state->recv_iov = iov;
fixed = (uint8_t *)iov[1].iov_base;
dyn = (uint8_t *)iov[2].iov_base;
dyn_len = iov[2].iov_len;
input_buffer_offset = IVAL(fixed, 0x18);
input_buffer_length = IVAL(fixed, 0x1C);
output_buffer_offset = IVAL(fixed, 0x20);
output_buffer_length = IVAL(fixed, 0x24);
if ((input_buffer_offset > 0) && (input_buffer_length > 0)) {
uint32_t ofs;
if (input_buffer_offset != dyn_ofs) {
tevent_req_nterror(
req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
if (input_buffer_length < dyn_len) {
tevent_req_nterror(
req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
if (input_buffer_length > state->max_input_length) {
tevent_req_nterror(
req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
state->out_input_buffer.data = dyn;
state->out_input_buffer.length = input_buffer_length;
ofs = input_buffer_length;
ofs = NDR_ROUND(ofs, 8);
dyn_ofs += ofs;
dyn += ofs;
dyn_len -= ofs;
}
if ((output_buffer_offset > 0) && (output_buffer_length > 0)) {
if (output_buffer_offset != dyn_ofs) {
tevent_req_nterror(
req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
if (output_buffer_length < dyn_len) {
tevent_req_nterror(
req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
if (output_buffer_length > state->max_output_length) {
tevent_req_nterror(
req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
state->out_output_buffer.data = dyn;
state->out_output_buffer.length = output_buffer_length;
}
tevent_req_done(req);
}
NTSTATUS smb2cli_ioctl_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
DATA_BLOB *out_input_buffer,
DATA_BLOB *out_output_buffer)
{
struct smb2cli_ioctl_state *state =
tevent_req_data(req,
struct smb2cli_ioctl_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
talloc_steal(mem_ctx, state->recv_iov);
if (out_input_buffer) {
*out_input_buffer = state->out_input_buffer;
}
if (out_output_buffer) {
*out_output_buffer = state->out_output_buffer;
}
tevent_req_received(req);
return NT_STATUS_OK;
}
NTSTATUS smb2cli_ioctl(struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon,
uint64_t in_fid_persistent,
uint64_t in_fid_volatile,
uint32_t in_ctl_code,
uint32_t in_max_input_length,
const DATA_BLOB *in_input_buffer,
uint32_t in_max_output_length,
const DATA_BLOB *in_output_buffer,
uint32_t in_flags,
TALLOC_CTX *mem_ctx,
DATA_BLOB *out_input_buffer,
DATA_BLOB *out_output_buffer)
{
TALLOC_CTX *frame = talloc_stackframe();
struct tevent_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_NO_MEMORY;
if (smbXcli_conn_has_async_calls(conn)) {
/*
* Can't use sync call while an async call is in flight
*/
status = NT_STATUS_INVALID_PARAMETER_MIX;
goto fail;
}
ev = samba_tevent_context_init(frame);
if (ev == NULL) {
goto fail;
}
req = smb2cli_ioctl_send(frame, ev, conn, timeout_msec,
session, tcon,
in_fid_persistent,
in_fid_volatile,
in_ctl_code,
in_max_input_length,
in_input_buffer,
in_max_output_length,
in_output_buffer,
in_flags);
if (req == NULL) {
goto fail;
}
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
goto fail;
}
status = smb2cli_ioctl_recv(req, mem_ctx,
out_input_buffer,
out_output_buffer);
fail:
TALLOC_FREE(frame);
return status;
}