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/*
Unix SMB/CIFS implementation.
SMB2 client ioctl call
Copyright (C) Andrew Tridgell 2005
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 "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
#include "librpc/gen_ndr/ioctl.h"
/*
send a ioctl request
*/
struct smb2_request *smb2_ioctl_send(struct smb2_tree *tree, struct smb2_ioctl *io)
{
NTSTATUS status;
struct smb2_request *req;
uint64_t max_payload_in;
uint64_t max_payload_out;
size_t max_payload;
req = smb2_request_init_tree(tree, SMB2_OP_IOCTL, 0x38, true,
io->in.in.length+io->in.out.length);
if (req == NULL) return NULL;
SSVAL(req->out.body, 0x02, 0); /* pad */
SIVAL(req->out.body, 0x04, io->in.function);
smb2_push_handle(req->out.body+0x08, &io->in.file.handle);
status = smb2_push_o32s32_blob(&req->out, 0x18, io->in.out);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(req);
return NULL;
}
SIVAL(req->out.body, 0x20, io->in.max_input_response);
status = smb2_push_o32s32_blob(&req->out, 0x24, io->in.in);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(req);
return NULL;
}
SIVAL(req->out.body, 0x2C, io->in.max_output_response);
SBVAL(req->out.body, 0x30, io->in.flags);
max_payload_in = io->in.out.length + io->in.in.length;
max_payload_in = MIN(max_payload_in, UINT32_MAX);
max_payload_out = io->in.max_input_response + io->in.max_output_response;
max_payload_out = MIN(max_payload_out, UINT32_MAX);
max_payload = MAX(max_payload_in, max_payload_out);
req->credit_charge = (MAX(max_payload, 1) - 1)/ 65536 + 1;
smb2_transport_send(req);
return req;
}
/*
* 3.3.4.4 Sending an Error Response
*/
static bool smb2_ioctl_is_failure(uint32_t ctl_code, NTSTATUS status,
size_t data_size)
{
if (NT_STATUS_IS_OK(status)) {
return false;
}
if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)
&& ((ctl_code == FSCTL_PIPE_TRANSCEIVE)
|| (ctl_code == FSCTL_PIPE_PEEK)
|| (ctl_code == FSCTL_DFS_GET_REFERRALS))) {
return false;
}
if (((ctl_code == FSCTL_SRV_COPYCHUNK)
|| (ctl_code == FSCTL_SRV_COPYCHUNK_WRITE))
&& (data_size == sizeof(struct srv_copychunk_rsp))) {
/*
* copychunk responses may come with copychunk data or error
* response data, independent of status.
*/
return false;
}
return true;
}
/*
recv a ioctl reply
*/
NTSTATUS smb2_ioctl_recv(struct smb2_request *req,
TALLOC_CTX *mem_ctx, struct smb2_ioctl *io)
{
NTSTATUS status;
if (!smb2_request_receive(req) ||
smb2_ioctl_is_failure(io->in.function, req->status,
req->in.bufinfo.data_size)) {
return smb2_request_destroy(req);
}
SMB2_CHECK_PACKET_RECV(req, 0x30, true);
io->out.reserved = SVAL(req->in.body, 0x02);
io->out.function = IVAL(req->in.body, 0x04);
smb2_pull_handle(req->in.body+0x08, &io->out.file.handle);
status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x18, &io->out.in);
if (!NT_STATUS_IS_OK(status)) {
smb2_request_destroy(req);
return status;
}
status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x20, &io->out.out);
if (!NT_STATUS_IS_OK(status)) {
smb2_request_destroy(req);
return status;
}
io->out.flags = IVAL(req->in.body, 0x28);
io->out.reserved2 = IVAL(req->in.body, 0x2C);
return smb2_request_destroy(req);
}
/*
sync ioctl request
*/
NTSTATUS smb2_ioctl(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_ioctl *io)
{
struct smb2_request *req = smb2_ioctl_send(tree, io);
return smb2_ioctl_recv(req, mem_ctx, io);
}
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