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2bb325ad91
This should fix DCERPC responses with fragments larger than 1024 bytes. metze Autobuild-User: Stefan Metzmacher <metze@samba.org> Autobuild-Date: Fri Jun 24 11:25:36 CEST 2011 on sn-devel-104
622 lines
17 KiB
C
622 lines
17 KiB
C
/*
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Unix SMB/CIFS implementation.
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Core SMB2 server
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Copyright (C) Stefan Metzmacher 2009
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "smbd/smbd.h"
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#include "smbd/globals.h"
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#include "../libcli/smb/smb_common.h"
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#include "../lib/util/tevent_ntstatus.h"
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#include "rpc_server/srv_pipe_hnd.h"
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#include "include/ntioctl.h"
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static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct smbd_smb2_request *smb2req,
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uint32_t in_ctl_code,
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uint64_t in_file_id_volatile,
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DATA_BLOB in_input,
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uint32_t in_max_output,
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uint32_t in_flags);
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static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
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TALLOC_CTX *mem_ctx,
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DATA_BLOB *out_output);
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static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq);
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NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req)
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{
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const uint8_t *inhdr;
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const uint8_t *inbody;
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int i = req->current_idx;
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size_t expected_body_size = 0x39;
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size_t body_size;
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uint32_t in_ctl_code;
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uint64_t in_file_id_persistent;
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uint64_t in_file_id_volatile;
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uint32_t in_input_offset;
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uint32_t in_input_length;
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DATA_BLOB in_input_buffer;
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uint32_t in_max_output_length;
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uint32_t in_flags;
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struct tevent_req *subreq;
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inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
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if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
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body_size = SVAL(inbody, 0x00);
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if (body_size != expected_body_size) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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in_ctl_code = IVAL(inbody, 0x04);
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in_file_id_persistent = BVAL(inbody, 0x08);
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in_file_id_volatile = BVAL(inbody, 0x10);
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in_input_offset = IVAL(inbody, 0x18);
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in_input_length = IVAL(inbody, 0x1C);
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in_max_output_length = IVAL(inbody, 0x2C);
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in_flags = IVAL(inbody, 0x30);
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if (in_input_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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if (in_input_length > req->in.vector[i+2].iov_len) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
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in_input_buffer.length = in_input_length;
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if (req->compat_chain_fsp) {
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/* skip check */
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} else if (in_file_id_persistent == UINT64_MAX &&
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in_file_id_volatile == UINT64_MAX) {
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/* without a handle */
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} else if (in_file_id_persistent != in_file_id_volatile) {
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return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
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}
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subreq = smbd_smb2_ioctl_send(req,
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req->sconn->smb2.event_ctx,
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req,
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in_ctl_code,
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in_file_id_volatile,
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in_input_buffer,
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in_max_output_length,
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in_flags);
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if (subreq == NULL) {
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return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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}
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tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
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return smbd_smb2_request_pending_queue(req, subreq);
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}
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static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
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{
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struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
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struct smbd_smb2_request);
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const uint8_t *inbody;
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int i = req->current_idx;
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uint8_t *outhdr;
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DATA_BLOB outbody;
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DATA_BLOB outdyn;
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uint32_t in_ctl_code;
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uint64_t in_file_id_persistent;
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uint64_t in_file_id_volatile;
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uint32_t out_input_offset;
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uint32_t out_output_offset;
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DATA_BLOB out_output_buffer = data_blob_null;
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NTSTATUS status;
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NTSTATUS error; /* transport error */
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status = smbd_smb2_ioctl_recv(subreq, req, &out_output_buffer);
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DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
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"%u status %s\n",
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(unsigned int)out_output_buffer.length,
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nt_errstr(status) ));
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TALLOC_FREE(subreq);
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if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
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/* also ok */
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} else if (!NT_STATUS_IS_OK(status)) {
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error = smbd_smb2_request_error(req, status);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->sconn,
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nt_errstr(error));
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return;
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}
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return;
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}
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out_input_offset = SMB2_HDR_BODY + 0x30;
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out_output_offset = SMB2_HDR_BODY + 0x30;
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inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
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in_ctl_code = IVAL(inbody, 0x04);
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in_file_id_persistent = BVAL(inbody, 0x08);
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in_file_id_volatile = BVAL(inbody, 0x10);
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outhdr = (uint8_t *)req->out.vector[i].iov_base;
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outbody = data_blob_talloc(req->out.vector, NULL, 0x30);
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if (outbody.data == NULL) {
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error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->sconn,
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nt_errstr(error));
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return;
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}
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return;
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}
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SSVAL(outbody.data, 0x00, 0x30 + 1); /* struct size */
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SSVAL(outbody.data, 0x02, 0); /* reserved */
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SIVAL(outbody.data, 0x04,
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in_ctl_code); /* ctl code */
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SBVAL(outbody.data, 0x08,
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in_file_id_persistent); /* file id (persistent) */
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SBVAL(outbody.data, 0x10,
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in_file_id_volatile); /* file id (volatile) */
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SIVAL(outbody.data, 0x18,
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out_input_offset); /* input offset */
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SIVAL(outbody.data, 0x1C, 0); /* input count */
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SIVAL(outbody.data, 0x20,
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out_output_offset); /* output offset */
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SIVAL(outbody.data, 0x24,
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out_output_buffer.length); /* output count */
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SIVAL(outbody.data, 0x28, 0); /* flags */
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SIVAL(outbody.data, 0x2C, 0); /* reserved */
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/*
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* Note: Windows Vista and 2008 send back also the
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* input from the request. But it was fixed in
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* Windows 7.
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*/
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outdyn = out_output_buffer;
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error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
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__location__);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->sconn,
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nt_errstr(error));
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return;
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}
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}
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struct smbd_smb2_ioctl_state {
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struct smbd_smb2_request *smb2req;
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struct smb_request *smbreq;
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files_struct *fsp;
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DATA_BLOB in_input;
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uint32_t in_max_output;
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DATA_BLOB out_output;
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};
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static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq);
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static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq);
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static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct smbd_smb2_request *smb2req,
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uint32_t in_ctl_code,
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uint64_t in_file_id_volatile,
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DATA_BLOB in_input,
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uint32_t in_max_output,
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uint32_t in_flags)
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{
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struct tevent_req *req;
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struct smbd_smb2_ioctl_state *state;
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struct smb_request *smbreq;
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files_struct *fsp = NULL;
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struct tevent_req *subreq;
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req = tevent_req_create(mem_ctx, &state,
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struct smbd_smb2_ioctl_state);
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if (req == NULL) {
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return NULL;
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}
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state->smb2req = smb2req;
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state->smbreq = NULL;
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state->fsp = NULL;
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state->in_input = in_input;
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state->in_max_output = in_max_output;
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state->out_output = data_blob_null;
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DEBUG(10, ("smbd_smb2_ioctl: ctl_code[0x%08x] file_id[0x%016llX]\n",
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(unsigned)in_ctl_code,
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(unsigned long long)in_file_id_volatile));
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smbreq = smbd_smb2_fake_smb_request(smb2req);
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if (tevent_req_nomem(smbreq, req)) {
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return tevent_req_post(req, ev);
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}
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state->smbreq = smbreq;
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if (in_file_id_volatile != UINT64_MAX) {
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fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
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if (fsp == NULL) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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if (smbreq->conn != fsp->conn) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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if (smb2req->session->vuid != fsp->vuid) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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state->fsp = fsp;
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}
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switch (in_ctl_code) {
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case 0x00060194: /* FSCTL_DFS_GET_REFERRALS */
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{
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uint16_t in_max_referral_level;
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DATA_BLOB in_file_name_buffer;
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char *in_file_name_string;
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size_t in_file_name_string_size;
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bool ok;
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bool overflow = false;
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NTSTATUS status;
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int dfs_size;
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char *dfs_data = NULL;
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if (!IS_IPC(smbreq->conn)) {
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tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
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return tevent_req_post(req, ev);
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}
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if (!lp_host_msdfs()) {
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tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
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return tevent_req_post(req, ev);
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}
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if (in_input.length < (2 + 2)) {
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tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
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return tevent_req_post(req, ev);
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}
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in_max_referral_level = SVAL(in_input.data, 0);
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in_file_name_buffer.data = in_input.data + 2;
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in_file_name_buffer.length = in_input.length - 2;
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ok = convert_string_talloc(state, CH_UTF16, CH_UNIX,
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in_file_name_buffer.data,
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in_file_name_buffer.length,
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&in_file_name_string,
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&in_file_name_string_size);
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if (!ok) {
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tevent_req_nterror(req, NT_STATUS_ILLEGAL_CHARACTER);
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return tevent_req_post(req, ev);
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}
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dfs_size = setup_dfs_referral(smbreq->conn,
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in_file_name_string,
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in_max_referral_level,
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&dfs_data, &status);
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if (dfs_size < 0) {
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tevent_req_nterror(req, status);
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return tevent_req_post(req, ev);
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}
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if (dfs_size > in_max_output) {
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/*
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* TODO: we need a testsuite for this
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*/
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overflow = true;
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dfs_size = in_max_output;
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}
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state->out_output = data_blob_talloc(state,
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(uint8_t *)dfs_data,
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dfs_size);
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SAFE_FREE(dfs_data);
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if (dfs_size > 0 &&
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tevent_req_nomem(state->out_output.data, req)) {
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return tevent_req_post(req, ev);
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}
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if (overflow) {
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tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
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} else {
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tevent_req_done(req);
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}
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return tevent_req_post(req, ev);
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}
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case 0x0011C017: /* FSCTL_PIPE_TRANSCEIVE */
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if (!IS_IPC(smbreq->conn)) {
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tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
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return tevent_req_post(req, ev);
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}
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if (fsp == NULL) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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if (!fsp_is_np(fsp)) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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DEBUG(10,("smbd_smb2_ioctl_send: np_write_send of size %u\n",
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(unsigned int)in_input.length ));
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subreq = np_write_send(state, ev,
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fsp->fake_file_handle,
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in_input.data,
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in_input.length);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq,
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smbd_smb2_ioctl_pipe_write_done,
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req);
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return req;
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case 0x00144064: /* FSCTL_SRV_ENUMERATE_SNAPSHOTS */
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{
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/*
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* This is called to retrieve the number of Shadow Copies (a.k.a. snapshots)
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* and return their volume names. If max_data_count is 16, then it is just
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* asking for the number of volumes and length of the combined names.
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*
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* pdata is the data allocated by our caller, but that uses
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* total_data_count (which is 0 in our case) rather than max_data_count.
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* Allocate the correct amount and return the pointer to let
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* it be deallocated when we return.
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*/
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struct shadow_copy_data *shadow_data = NULL;
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bool labels = False;
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uint32_t labels_data_count = 0;
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uint32_t data_count;
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uint32_t i;
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char *pdata;
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NTSTATUS status;
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if (fsp == NULL) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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if (in_max_output < 16) {
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DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: "
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"in_max_output(%u) < 16 is invalid!\n",
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in_max_output));
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tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
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return tevent_req_post(req, ev);
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}
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if (in_max_output > 16) {
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labels = True;
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}
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shadow_data = talloc_zero(talloc_tos(),
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struct shadow_copy_data);
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if (tevent_req_nomem(shadow_data, req)) {
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DEBUG(0,("TALLOC_ZERO() failed!\n"));
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return tevent_req_post(req, ev);
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}
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/*
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* Call the VFS routine to actually do the work.
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*/
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if (SMB_VFS_GET_SHADOW_COPY_DATA(fsp, shadow_data, labels)
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!= 0) {
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if (errno == ENOSYS) {
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DEBUG(5, ("FSCTL_GET_SHADOW_COPY_DATA: "
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"connectpath %s, not supported.\n",
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smbreq->conn->connectpath));
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status = NT_STATUS_NOT_SUPPORTED;
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} else {
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DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: "
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"connectpath %s, failed.\n",
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smbreq->conn->connectpath));
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status = map_nt_error_from_unix(errno);
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}
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TALLOC_FREE(shadow_data);
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tevent_req_nterror(req, status);
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return tevent_req_post(req, ev);
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}
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labels_data_count =
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(shadow_data->num_volumes*2*sizeof(SHADOW_COPY_LABEL))
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+ 2;
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if (labels) {
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data_count = 12+labels_data_count+4;
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} else {
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data_count = 16;
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}
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if (labels && (in_max_output < data_count)) {
|
|
DEBUG(0, ("FSCTL_GET_SHADOW_COPY_DATA: "
|
|
"in_max_output(%u) too small (%u) bytes "
|
|
"needed!\n", in_max_output, data_count));
|
|
TALLOC_FREE(shadow_data);
|
|
tevent_req_nterror(req, NT_STATUS_BUFFER_TOO_SMALL);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
state->out_output = data_blob_talloc(state, NULL, data_count);
|
|
if (tevent_req_nomem(state->out_output.data, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
pdata = (char *)state->out_output.data;
|
|
|
|
/* num_volumes 4 bytes */
|
|
SIVAL(pdata, 0, shadow_data->num_volumes);
|
|
|
|
if (labels) {
|
|
/* num_labels 4 bytes */
|
|
SIVAL(pdata, 4, shadow_data->num_volumes);
|
|
}
|
|
|
|
/* needed_data_count 4 bytes */
|
|
SIVAL(pdata, 8, labels_data_count+4);
|
|
|
|
pdata += 12;
|
|
|
|
DEBUG(10,("FSCTL_GET_SHADOW_COPY_DATA: %u volumes for "
|
|
"path[%s].\n",
|
|
shadow_data->num_volumes, fsp_str_dbg(fsp)));
|
|
if (labels && shadow_data->labels) {
|
|
for (i=0; i<shadow_data->num_volumes; i++) {
|
|
srvstr_push(pdata, smbreq->flags2,
|
|
pdata, shadow_data->labels[i],
|
|
2*sizeof(SHADOW_COPY_LABEL),
|
|
STR_UNICODE|STR_TERMINATE);
|
|
pdata += 2*sizeof(SHADOW_COPY_LABEL);
|
|
DEBUGADD(10, ("Label[%u]: '%s'\n", i,
|
|
shadow_data->labels[i]));
|
|
}
|
|
}
|
|
|
|
TALLOC_FREE(shadow_data);
|
|
|
|
tevent_req_done(req);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
default:
|
|
if (IS_IPC(smbreq->conn)) {
|
|
tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req = tevent_req_callback_data(subreq,
|
|
struct tevent_req);
|
|
struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
|
|
struct smbd_smb2_ioctl_state);
|
|
NTSTATUS status;
|
|
ssize_t nwritten = -1;
|
|
|
|
status = np_write_recv(subreq, &nwritten);
|
|
|
|
DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: received %ld\n",
|
|
(long int)nwritten ));
|
|
|
|
TALLOC_FREE(subreq);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
tevent_req_nterror(req, status);
|
|
return;
|
|
}
|
|
|
|
if (nwritten != state->in_input.length) {
|
|
tevent_req_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
|
|
return;
|
|
}
|
|
|
|
state->out_output = data_blob_talloc(state, NULL, state->in_max_output);
|
|
if (state->in_max_output > 0 &&
|
|
tevent_req_nomem(state->out_output.data, req)) {
|
|
return;
|
|
}
|
|
|
|
DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: issuing np_read_send "
|
|
"of size %u\n",
|
|
(unsigned int)state->out_output.length ));
|
|
|
|
TALLOC_FREE(subreq);
|
|
subreq = np_read_send(state->smbreq->conn,
|
|
state->smb2req->sconn->smb2.event_ctx,
|
|
state->fsp->fake_file_handle,
|
|
state->out_output.data,
|
|
state->out_output.length);
|
|
if (tevent_req_nomem(subreq, req)) {
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, smbd_smb2_ioctl_pipe_read_done, req);
|
|
}
|
|
|
|
static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq)
|
|
{
|
|
struct tevent_req *req = tevent_req_callback_data(subreq,
|
|
struct tevent_req);
|
|
struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
|
|
struct smbd_smb2_ioctl_state);
|
|
NTSTATUS status;
|
|
ssize_t nread = -1;
|
|
bool is_data_outstanding = false;
|
|
|
|
status = np_read_recv(subreq, &nread, &is_data_outstanding);
|
|
|
|
DEBUG(10,("smbd_smb2_ioctl_pipe_read_done: np_read_recv nread = %d "
|
|
"is_data_outstanding = %d, status = %s\n",
|
|
(int)nread,
|
|
(int)is_data_outstanding,
|
|
nt_errstr(status) ));
|
|
|
|
TALLOC_FREE(subreq);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
tevent_req_nterror(req, status);
|
|
return;
|
|
}
|
|
|
|
state->out_output.length = nread;
|
|
|
|
if (is_data_outstanding) {
|
|
tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
|
|
return;
|
|
}
|
|
|
|
tevent_req_done(req);
|
|
}
|
|
|
|
static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
|
|
TALLOC_CTX *mem_ctx,
|
|
DATA_BLOB *out_output)
|
|
{
|
|
NTSTATUS status = NT_STATUS_OK;
|
|
struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
|
|
struct smbd_smb2_ioctl_state);
|
|
|
|
if (tevent_req_is_nterror(req, &status)) {
|
|
if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
|
|
tevent_req_received(req);
|
|
return status;
|
|
}
|
|
}
|
|
|
|
*out_output = state->out_output;
|
|
talloc_steal(mem_ctx, out_output->data);
|
|
|
|
tevent_req_received(req);
|
|
return status;
|
|
}
|