/*
   Unix SMB/CIFS implementation.
   Core SMB2 server

   Copyright (C) Stefan Metzmacher 2009
   Copyright (C) Jeremy Allison 2010

   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 "trans2.h"

static struct tevent_req *smbd_smb2_setinfo_send(TALLOC_CTX *mem_ctx,
						 struct tevent_context *ev,
						 struct smbd_smb2_request *smb2req,
						 uint8_t in_info_type,
						 uint8_t in_file_info_class,
						 DATA_BLOB in_input_buffer,
						 uint32_t in_additional_information,
						 uint64_t in_file_id_volatile);
static NTSTATUS smbd_smb2_setinfo_recv(struct tevent_req *req);

static void smbd_smb2_request_setinfo_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_setinfo(struct smbd_smb2_request *req)
{
	const uint8_t *inhdr;
	const uint8_t *inbody;
	int i = req->current_idx;
	size_t expected_body_size = 0x21;
	size_t body_size;
	uint8_t in_info_type;
	uint8_t in_file_info_class;
	uint16_t in_input_buffer_offset;
	uint32_t in_input_buffer_length;
	DATA_BLOB in_input_buffer;
	uint32_t in_additional_information;
	uint64_t in_file_id_persistent;
	uint64_t in_file_id_volatile;
	struct tevent_req *subreq;

	inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
	if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	inbody = (const uint8_t *)req->in.vector[i+1].iov_base;

	body_size = SVAL(inbody, 0x00);
	if (body_size != expected_body_size) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	in_info_type			= CVAL(inbody, 0x02);
	in_file_info_class		= CVAL(inbody, 0x03);
	in_input_buffer_length		= IVAL(inbody, 0x04);
	in_input_buffer_offset		= SVAL(inbody, 0x08);
	/* 0x0A 2 bytes reserved */
	in_additional_information	= IVAL(inbody, 0x0C);
	in_file_id_persistent		= BVAL(inbody, 0x10);
	in_file_id_volatile		= BVAL(inbody, 0x18);

	if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
		/* This is ok */
	} else if (in_input_buffer_offset !=
		   (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	if (in_input_buffer_length > req->in.vector[i+2].iov_len) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
	in_input_buffer.length = in_input_buffer_length;

	if (req->compat_chain_fsp) {
		/* skip check */
	} else if (in_file_id_persistent != in_file_id_volatile) {
		return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
	}

	subreq = smbd_smb2_setinfo_send(req,
					req->sconn->smb2.event_ctx,
					req,
					in_info_type,
					in_file_info_class,
					in_input_buffer,
					in_additional_information,
					in_file_id_volatile);
	if (subreq == NULL) {
		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
	}
	tevent_req_set_callback(subreq, smbd_smb2_request_setinfo_done, req);

	return smbd_smb2_request_pending_queue(req, subreq);
}

static void smbd_smb2_request_setinfo_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	DATA_BLOB outbody;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_setinfo_recv(subreq);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	outbody = data_blob_talloc(req->out.vector, NULL, 0x02);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x02);	/* struct size */

	error = smbd_smb2_request_done(req, outbody, NULL);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->sconn,
						 nt_errstr(error));
		return;
	}
}

struct smbd_smb2_setinfo_state {
	struct smbd_smb2_request *smb2req;
};

static struct tevent_req *smbd_smb2_setinfo_send(TALLOC_CTX *mem_ctx,
						 struct tevent_context *ev,
						 struct smbd_smb2_request *smb2req,
						 uint8_t in_info_type,
						 uint8_t in_file_info_class,
						 DATA_BLOB in_input_buffer,
						 uint32_t in_additional_information,
						 uint64_t in_file_id_volatile)
{
	struct tevent_req *req = NULL;
	struct smbd_smb2_setinfo_state *state = NULL;
	struct smb_request *smbreq = NULL;
	connection_struct *conn = smb2req->tcon->compat_conn;
	files_struct *fsp = NULL;
	NTSTATUS status;

	req = tevent_req_create(mem_ctx, &state,
				struct smbd_smb2_setinfo_state);
	if (req == NULL) {
		return NULL;
	}
	state->smb2req = smb2req;

	DEBUG(10,("smbd_smb2_setinfo_send: file_id[0x%016llX]\n",
		  (unsigned long long)in_file_id_volatile));

	smbreq = smbd_smb2_fake_smb_request(smb2req);
	if (tevent_req_nomem(smbreq, req)) {
		return tevent_req_post(req, ev);
	}

	fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
	if (fsp == NULL) {
		tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
		return tevent_req_post(req, ev);
	}
	if (conn != fsp->conn) {
		tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
		return tevent_req_post(req, ev);
	}
	if (smb2req->session->vuid != fsp->vuid) {
		tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
		return tevent_req_post(req, ev);
	}

	if (IS_IPC(conn)) {
		tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
		return tevent_req_post(req, ev);
	}

	switch (in_info_type) {
	case 0x01:/* SMB2_SETINFO_FILE */
	{
		uint16_t file_info_level;
		char *data;
		int data_size;
		int ret_size = 0;


		file_info_level = in_file_info_class + 1000;
		if (file_info_level == SMB_FILE_RENAME_INFORMATION) {
			/* SMB2_FILE_RENAME_INFORMATION_INTERNAL == 0xFF00 + in_file_info_class */
			file_info_level = SMB2_FILE_RENAME_INFORMATION_INTERNAL;
			if (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK &&
			    fsp->oplock_type != NO_OPLOCK) {
				/* No break, but error. */
				tevent_req_nterror(req, NT_STATUS_SHARING_VIOLATION);
				return tevent_req_post(req, ev);
			}
		}

		if (fsp->fh->fd == -1) {
			/*
			 * This is actually a SETFILEINFO on a directory
			 * handle (returned from an NT SMB). NT5.0 seems
			 * to do this call. JRA.
			 */
			if (INFO_LEVEL_IS_UNIX(file_info_level)) {
				/* Always do lstat for UNIX calls. */
				if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
					DEBUG(3,("smbd_smb2_setinfo_send: "
						 "SMB_VFS_LSTAT of %s failed "
						 "(%s)\n", fsp_str_dbg(fsp),
						 strerror(errno)));
					status = map_nt_error_from_unix(errno);
					tevent_req_nterror(req, status);
					return tevent_req_post(req, ev);
				}
			} else {
				if (SMB_VFS_STAT(conn, fsp->fsp_name) != 0) {
					DEBUG(3,("smbd_smb2_setinfo_send: "
						 "fileinfo of %s failed (%s)\n",
						 fsp_str_dbg(fsp),
						 strerror(errno)));
					status = map_nt_error_from_unix(errno);
					tevent_req_nterror(req, status);
					return tevent_req_post(req, ev);
				}
			}
		} else if (fsp->print_file) {
			/*
			 * Doing a DELETE_ON_CLOSE should cancel a print job.
			 */
			if ((file_info_level == SMB_SET_FILE_DISPOSITION_INFO)
			    && in_input_buffer.length >= 1
			    && CVAL(in_input_buffer.data,0)) {
				fsp->fh->private_options |= NTCREATEX_OPTIONS_PRIVATE_DELETE_ON_CLOSE;

				DEBUG(3,("smbd_smb2_setinfo_send: "
					 "Cancelling print job (%s)\n",
					 fsp_str_dbg(fsp)));

				tevent_req_done(req);
				return tevent_req_post(req, ev);
			} else {
				tevent_req_nterror(req,
					NT_STATUS_OBJECT_PATH_INVALID);
				return tevent_req_post(req, ev);
			}
		} else {
			/*
			 * Original code - this is an open file.
			 */

			if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
				DEBUG(3,("smbd_smb2_setinfo_send: fstat "
					 "of fnum %d failed (%s)\n", fsp->fnum,
					 strerror(errno)));
				status = map_nt_error_from_unix(errno);
				tevent_req_nterror(req, status);
				return tevent_req_post(req, ev);
			}
		}

		data = NULL;
		data_size = in_input_buffer.length;
		if (data_size > 0) {
			data = (char *)SMB_MALLOC_ARRAY(char, data_size);
			if (tevent_req_nomem(data, req)) {
				return tevent_req_post(req, ev);
			}
			memcpy(data, in_input_buffer.data, data_size);
		}

		status = smbd_do_setfilepathinfo(conn, smbreq, state,
						 file_info_level,
						 fsp,
						 fsp->fsp_name,
						 &data,
						 data_size,
						 &ret_size);
		SAFE_FREE(data);
		if (!NT_STATUS_IS_OK(status)) {
			if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
				status = NT_STATUS_INVALID_INFO_CLASS;
			}
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}
		break;
	}

	case 0x03:/* SMB2_SETINFO_SECURITY */
	{
		if (!CAN_WRITE(conn)) {
			tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
			return tevent_req_post(req, ev);
		}

		status = set_sd(fsp,
				in_input_buffer.data,
				in_input_buffer.length,
				in_additional_information);
		if (!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}
		break;
	}

	default:
		tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
		return tevent_req_post(req, ev);
	}

	tevent_req_done(req);
	return tevent_req_post(req, ev);
}

static NTSTATUS smbd_smb2_setinfo_recv(struct tevent_req *req)
{
	NTSTATUS status;

	if (tevent_req_is_nterror(req, &status)) {
		tevent_req_received(req);
		return status;
	}

	tevent_req_received(req);
	return NT_STATUS_OK;
}