mirror of
https://github.com/samba-team/samba.git
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11963877ab
(This used to be commit fb91a37e92
)
644 lines
18 KiB
C
644 lines
18 KiB
C
/*
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Unix SMB/CIFS implementation.
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NT transaction handling
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Copyright (C) Andrew Tridgell 2003
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Copyright (C) James J Myers 2003 <myersjj@samba.org>
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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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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This file handles the parsing of transact2 requests
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*/
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#include "includes.h"
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#include "smb_server/smb_server.h"
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#include "ntvfs/ntvfs.h"
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#include "libcli/raw/libcliraw.h"
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#include "librpc/gen_ndr/ndr_security.h"
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/*
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hold the state of a nttrans op while in progress. Needed to allow for async backend
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functions.
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*/
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struct nttrans_op {
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struct smb_nttrans *trans;
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NTSTATUS (*send_fn)(struct nttrans_op *);
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void *op_info;
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};
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/* setup a nttrans reply, given the data and params sizes */
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static NTSTATUS nttrans_setup_reply(struct nttrans_op *op,
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struct smb_nttrans *trans,
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uint16_t param_size, uint16_t data_size,
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uint16_t setup_count)
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{
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trans->out.setup_count = setup_count;
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if (setup_count != 0) {
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trans->out.setup = talloc_zero_array(op, uint16_t, setup_count);
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NT_STATUS_HAVE_NO_MEMORY(trans->out.setup);
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}
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trans->out.params = data_blob_talloc(op, NULL, param_size);
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if (param_size != 0) {
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NT_STATUS_HAVE_NO_MEMORY(trans->out.params.data);
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}
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trans->out.data = data_blob_talloc(op, NULL, data_size);
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if (data_size != 0) {
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NT_STATUS_HAVE_NO_MEMORY(trans->out.data.data);
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}
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return NT_STATUS_OK;
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}
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/*
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send a nttrans create reply
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*/
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static NTSTATUS nttrans_create_send(struct nttrans_op *op)
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{
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union smb_open *io = talloc_get_type(op->op_info, union smb_open);
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uint8_t *params;
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op->trans->out.setup_count = 0;
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op->trans->out.setup = NULL;
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op->trans->out.params = data_blob_talloc(op, NULL, 69);
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op->trans->out.data = data_blob(NULL, 0);
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params = op->trans->out.params.data;
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NT_STATUS_HAVE_NO_MEMORY(params);
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SSVAL(params, 0, io->ntcreatex.out.oplock_level);
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SSVAL(params, 2, io->ntcreatex.out.file.fnum);
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SIVAL(params, 4, io->ntcreatex.out.create_action);
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SIVAL(params, 8, 0); /* ea error offset */
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push_nttime(params, 12, io->ntcreatex.out.create_time);
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push_nttime(params, 20, io->ntcreatex.out.access_time);
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push_nttime(params, 28, io->ntcreatex.out.write_time);
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push_nttime(params, 36, io->ntcreatex.out.change_time);
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SIVAL(params, 44, io->ntcreatex.out.attrib);
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SBVAL(params, 48, io->ntcreatex.out.alloc_size);
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SBVAL(params, 56, io->ntcreatex.out.size);
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SSVAL(params, 64, io->ntcreatex.out.file_type);
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SSVAL(params, 66, io->ntcreatex.out.ipc_state);
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SCVAL(params, 68, io->ntcreatex.out.is_directory);
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return NT_STATUS_OK;
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}
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/*
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parse NTTRANS_CREATE request
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*/
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static NTSTATUS nttrans_create(struct smbsrv_request *req,
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struct nttrans_op *op)
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{
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struct smb_nttrans *trans = op->trans;
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union smb_open *io;
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uint16_t fname_len;
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uint32_t sd_length, ea_length;
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NTSTATUS status;
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uint8_t *params;
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if (trans->in.params.length < 54) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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/* parse the request */
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io = talloc(op, union smb_open);
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NT_STATUS_HAVE_NO_MEMORY(io);
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io->ntcreatex.level = RAW_OPEN_NTTRANS_CREATE;
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params = trans->in.params.data;
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io->ntcreatex.in.flags = IVAL(params, 0);
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io->ntcreatex.in.root_fid = IVAL(params, 4);
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io->ntcreatex.in.access_mask = IVAL(params, 8);
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io->ntcreatex.in.alloc_size = BVAL(params, 12);
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io->ntcreatex.in.file_attr = IVAL(params, 20);
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io->ntcreatex.in.share_access = IVAL(params, 24);
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io->ntcreatex.in.open_disposition = IVAL(params, 28);
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io->ntcreatex.in.create_options = IVAL(params, 32);
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sd_length = IVAL(params, 36);
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ea_length = IVAL(params, 40);
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fname_len = IVAL(params, 44);
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io->ntcreatex.in.impersonation = IVAL(params, 48);
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io->ntcreatex.in.security_flags = CVAL(params, 52);
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io->ntcreatex.in.sec_desc = NULL;
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io->ntcreatex.in.ea_list = NULL;
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req_pull_string(req, &io->ntcreatex.in.fname,
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params + 53,
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MIN(fname_len+1, trans->in.params.length - 53),
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STR_NO_RANGE_CHECK | STR_TERMINATE);
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if (!io->ntcreatex.in.fname) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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if (sd_length > trans->in.data.length ||
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ea_length > trans->in.data.length ||
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(sd_length+ea_length) > trans->in.data.length) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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/* this call has an optional security descriptor */
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if (sd_length != 0) {
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DATA_BLOB blob;
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blob.data = trans->in.data.data;
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blob.length = sd_length;
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io->ntcreatex.in.sec_desc = talloc(io, struct security_descriptor);
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if (io->ntcreatex.in.sec_desc == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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status = ndr_pull_struct_blob(&blob, io,
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io->ntcreatex.in.sec_desc,
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(ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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}
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/* and an optional ea_list */
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if (ea_length > 4) {
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DATA_BLOB blob;
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blob.data = trans->in.data.data + sd_length;
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blob.length = ea_length;
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io->ntcreatex.in.ea_list = talloc(io, struct smb_ea_list);
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if (io->ntcreatex.in.ea_list == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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status = ea_pull_list_chained(&blob, io,
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&io->ntcreatex.in.ea_list->num_eas,
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&io->ntcreatex.in.ea_list->eas);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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}
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op->send_fn = nttrans_create_send;
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op->op_info = io;
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return ntvfs_open(req->ntvfs, io);
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}
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/*
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send NTTRANS_QUERY_SEC_DESC reply
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*/
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static NTSTATUS nttrans_query_sec_desc_send(struct nttrans_op *op)
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{
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struct smb_nttrans *trans = op->trans;
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union smb_fileinfo *io = talloc_get_type(op->op_info, union smb_fileinfo);
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NTSTATUS status;
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trans->out.setup_count = 0;
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trans->out.setup = NULL;
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trans->out.params = data_blob_talloc(op, NULL, 4);
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trans->out.data = data_blob(NULL, 0);
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NT_STATUS_HAVE_NO_MEMORY(trans->out.params.data);
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status = ndr_push_struct_blob(&trans->out.data, op,
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io->query_secdesc.out.sd,
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(ndr_push_flags_fn_t)ndr_push_security_descriptor);
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NT_STATUS_NOT_OK_RETURN(status);
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SIVAL(trans->out.params.data, 0, trans->out.data.length);
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return NT_STATUS_OK;
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}
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/*
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parse NTTRANS_QUERY_SEC_DESC request
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*/
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static NTSTATUS nttrans_query_sec_desc(struct smbsrv_request *req,
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struct nttrans_op *op)
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{
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struct smb_nttrans *trans = op->trans;
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union smb_fileinfo *io;
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if (trans->in.params.length < 8) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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/* parse the request */
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io = talloc(op, union smb_fileinfo);
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NT_STATUS_HAVE_NO_MEMORY(io);
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io->query_secdesc.level = RAW_FILEINFO_SEC_DESC;
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io->query_secdesc.in.file.fnum = SVAL(trans->in.params.data, 0);
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io->query_secdesc.in.secinfo_flags = IVAL(trans->in.params.data, 4);
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op->op_info = io;
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op->send_fn = nttrans_query_sec_desc_send;
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return ntvfs_qfileinfo(req->ntvfs, io);
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}
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/*
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parse NTTRANS_SET_SEC_DESC request
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*/
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static NTSTATUS nttrans_set_sec_desc(struct smbsrv_request *req,
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struct nttrans_op *op)
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{
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struct smb_nttrans *trans = op->trans;
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union smb_setfileinfo *io;
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NTSTATUS status;
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if (trans->in.params.length < 8) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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/* parse the request */
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io = talloc(req, union smb_setfileinfo);
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NT_STATUS_HAVE_NO_MEMORY(io);
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io->set_secdesc.level = RAW_SFILEINFO_SEC_DESC;
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io->set_secdesc.in.file.fnum = SVAL(trans->in.params.data, 0);
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io->set_secdesc.in.secinfo_flags = IVAL(trans->in.params.data, 4);
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io->set_secdesc.in.sd = talloc(io, struct security_descriptor);
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NT_STATUS_HAVE_NO_MEMORY(io->set_secdesc.in.sd);
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status = ndr_pull_struct_blob(&trans->in.data, req,
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io->set_secdesc.in.sd,
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(ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
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NT_STATUS_NOT_OK_RETURN(status);
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trans->out.setup_count = 0;
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trans->out.setup = NULL;
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trans->out.params = data_blob(NULL, 0);
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trans->out.data = data_blob(NULL, 0);
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return ntvfs_setfileinfo(req->ntvfs, io);
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}
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/* parse NTTRANS_RENAME request
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*/
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static NTSTATUS nttrans_rename(struct smbsrv_request *req,
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struct nttrans_op *op)
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{
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return NT_STATUS_NOT_IMPLEMENTED;
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}
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/*
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parse NTTRANS_IOCTL request
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*/
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static NTSTATUS nttrans_ioctl(struct smbsrv_request *req,
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struct nttrans_op *op)
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{
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struct smb_nttrans *trans = op->trans;
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union smb_ioctl *nt;
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uint32_t function;
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uint16_t fnum;
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uint8_t filter;
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BOOL fsctl;
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DATA_BLOB *blob;
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NTSTATUS status;
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/* should have at least 4 setup words */
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if (trans->in.setup_count != 4) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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nt = talloc(op, union smb_ioctl);
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NT_STATUS_HAVE_NO_MEMORY(nt);
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function = IVAL(trans->in.setup, 0);
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fnum = SVAL(trans->in.setup, 4);
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fsctl = CVAL(trans->in.setup, 6);
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filter = CVAL(trans->in.setup, 7);
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blob = &trans->in.data;
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nt->ntioctl.level = RAW_IOCTL_NTIOCTL;
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nt->ntioctl.in.file.fnum = fnum;
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nt->ntioctl.in.function = function;
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nt->ntioctl.in.fsctl = fsctl;
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nt->ntioctl.in.filter = filter;
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status = nttrans_setup_reply(op, trans, 0, 0, 1);
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NT_STATUS_NOT_OK_RETURN(status);
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trans->out.setup[0] = 0;
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return ntvfs_ioctl(req->ntvfs, nt);
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}
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/*
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send NTTRANS_NOTIFY_CHANGE reply
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*/
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static NTSTATUS nttrans_notify_change_send(struct nttrans_op *op)
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{
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struct smb_notify *info = talloc_get_type(op->op_info, struct smb_notify);
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size_t size = 0;
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int i;
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NTSTATUS status;
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uint8_t *p;
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#define MAX_BYTES_PER_CHAR 3
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/* work out how big the reply buffer could be */
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for (i=0;i<info->out.num_changes;i++) {
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size += 12 + 3 + (1+strlen(info->out.changes[i].name.s)) * MAX_BYTES_PER_CHAR;
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}
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status = nttrans_setup_reply(op, op->trans, size, 0, 0);
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NT_STATUS_NOT_OK_RETURN(status);
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p = op->trans->out.params.data;
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/* construct the changes buffer */
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for (i=0;i<info->out.num_changes;i++) {
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uint32_t ofs;
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ssize_t len;
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SIVAL(p, 4, info->out.changes[i].action);
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len = push_string(p + 12, info->out.changes[i].name.s,
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op->trans->out.params.length -
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(p+12 - op->trans->out.params.data), STR_UNICODE);
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SIVAL(p, 8, len);
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ofs = len + 12;
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if (ofs & 3) {
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int pad = 4 - (ofs & 3);
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memset(p+ofs, 0, pad);
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ofs += pad;
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}
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if (i == info->out.num_changes-1) {
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SIVAL(p, 0, 0);
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} else {
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SIVAL(p, 0, ofs);
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}
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p += ofs;
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}
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op->trans->out.params.length = p - op->trans->out.params.data;
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return NT_STATUS_OK;
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}
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/*
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parse NTTRANS_NOTIFY_CHANGE request
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*/
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static NTSTATUS nttrans_notify_change(struct smbsrv_request *req,
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struct nttrans_op *op)
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{
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struct smb_nttrans *trans = op->trans;
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struct smb_notify *info;
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/* should have at least 4 setup words */
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if (trans->in.setup_count != 4) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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info = talloc(op, struct smb_notify);
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NT_STATUS_HAVE_NO_MEMORY(info);
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info->in.completion_filter = IVAL(trans->in.setup, 0);
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info->in.file.fnum = SVAL(trans->in.setup, 4);
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info->in.recursive = SVAL(trans->in.setup, 6);
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info->in.buffer_size = trans->in.max_param;
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op->op_info = info;
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op->send_fn = nttrans_notify_change_send;
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return ntvfs_notify(req->ntvfs, info);
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}
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/*
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backend for nttrans requests
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*/
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static NTSTATUS nttrans_backend(struct smbsrv_request *req,
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struct nttrans_op *op)
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{
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/* the nttrans command is in function */
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switch (op->trans->in.function) {
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case NT_TRANSACT_CREATE:
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return nttrans_create(req, op);
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case NT_TRANSACT_IOCTL:
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return nttrans_ioctl(req, op);
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case NT_TRANSACT_RENAME:
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return nttrans_rename(req, op);
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case NT_TRANSACT_QUERY_SECURITY_DESC:
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return nttrans_query_sec_desc(req, op);
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case NT_TRANSACT_SET_SECURITY_DESC:
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return nttrans_set_sec_desc(req, op);
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case NT_TRANSACT_NOTIFY_CHANGE:
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return nttrans_notify_change(req, op);
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}
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/* an unknown nttrans command */
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return NT_STATUS_DOS(ERRSRV, ERRerror);
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}
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static void reply_nttrans_send(struct ntvfs_request *ntvfs)
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{
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struct smbsrv_request *req;
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uint16_t params_left, data_left;
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uint8_t *params, *data;
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struct smb_nttrans *trans;
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struct nttrans_op *op;
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SMBSRV_CHECK_ASYNC_STATUS(op, struct nttrans_op);
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trans = op->trans;
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/* if this function needs work to form the nttrans reply buffer, then
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call that now */
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if (op->send_fn != NULL) {
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NTSTATUS status;
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status = op->send_fn(op);
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if (!NT_STATUS_IS_OK(status)) {
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smbsrv_send_error(req, status);
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return;
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}
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}
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smbsrv_setup_reply(req, 18 + trans->out.setup_count, 0);
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/* note that we don't check the max_setup count (matching w2k3
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behaviour) */
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if (trans->out.params.length > trans->in.max_param) {
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smbsrv_setup_error(req, NT_STATUS_BUFFER_TOO_SMALL);
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trans->out.params.length = trans->in.max_param;
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}
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if (trans->out.data.length > trans->in.max_data) {
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smbsrv_setup_error(req, NT_STATUS_BUFFER_TOO_SMALL);
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trans->out.data.length = trans->in.max_data;
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}
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params_left = trans->out.params.length;
|
|
data_left = trans->out.data.length;
|
|
params = trans->out.params.data;
|
|
data = trans->out.data.data;
|
|
|
|
/* we need to divide up the reply into chunks that fit into
|
|
the negotiated buffer size */
|
|
do {
|
|
uint16_t this_data, this_param, max_bytes;
|
|
uint_t align1 = 1, align2 = (params_left ? 2 : 0);
|
|
struct smbsrv_request *this_req;
|
|
int i;
|
|
|
|
max_bytes = req_max_data(req) - (align1 + align2);
|
|
|
|
this_param = params_left;
|
|
if (this_param > max_bytes) {
|
|
this_param = max_bytes;
|
|
}
|
|
max_bytes -= this_param;
|
|
|
|
this_data = data_left;
|
|
if (this_data > max_bytes) {
|
|
this_data = max_bytes;
|
|
}
|
|
|
|
/* don't destroy unless this is the last chunk */
|
|
if (params_left - this_param != 0 ||
|
|
data_left - this_data != 0) {
|
|
this_req = smbsrv_setup_secondary_request(req);
|
|
} else {
|
|
this_req = req;
|
|
}
|
|
|
|
req_grow_data(req, this_param + this_data + (align1 + align2));
|
|
|
|
SSVAL(this_req->out.vwv, 0, 0); /* reserved */
|
|
SCVAL(this_req->out.vwv, 2, 0); /* reserved */
|
|
SIVAL(this_req->out.vwv, 3, trans->out.params.length);
|
|
SIVAL(this_req->out.vwv, 7, trans->out.data.length);
|
|
|
|
SIVAL(this_req->out.vwv, 11, this_param);
|
|
SIVAL(this_req->out.vwv, 15, align1 + PTR_DIFF(this_req->out.data, this_req->out.hdr));
|
|
SIVAL(this_req->out.vwv, 19, PTR_DIFF(params, trans->out.params.data));
|
|
|
|
SIVAL(this_req->out.vwv, 23, this_data);
|
|
SIVAL(this_req->out.vwv, 27, align1 + align2 +
|
|
PTR_DIFF(this_req->out.data + this_param, this_req->out.hdr));
|
|
SIVAL(this_req->out.vwv, 31, PTR_DIFF(data, trans->out.data.data));
|
|
|
|
SCVAL(this_req->out.vwv, 35, trans->out.setup_count);
|
|
for (i=0;i<trans->out.setup_count;i++) {
|
|
SSVAL(this_req->out.vwv, VWV(18+i), trans->out.setup[i]);
|
|
}
|
|
|
|
memset(this_req->out.data, 0, align1);
|
|
if (this_param != 0) {
|
|
memcpy(this_req->out.data + align1, params, this_param);
|
|
}
|
|
memset(this_req->out.data+this_param+align1, 0, align2);
|
|
if (this_data != 0) {
|
|
memcpy(this_req->out.data+this_param+align1+align2,
|
|
data, this_data);
|
|
}
|
|
|
|
params_left -= this_param;
|
|
data_left -= this_data;
|
|
params += this_param;
|
|
data += this_data;
|
|
|
|
smbsrv_send_reply(this_req);
|
|
} while (params_left != 0 || data_left != 0);
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
Reply to an SMBnttrans request
|
|
****************************************************************************/
|
|
void smbsrv_reply_nttrans(struct smbsrv_request *req)
|
|
{
|
|
struct nttrans_op *op;
|
|
struct smb_nttrans *trans;
|
|
int i;
|
|
uint16_t param_ofs, data_ofs;
|
|
uint16_t param_count, data_count;
|
|
uint16_t param_total, data_total;
|
|
|
|
/* parse request */
|
|
if (req->in.wct < 19) {
|
|
smbsrv_send_error(req, NT_STATUS_FOOBAR);
|
|
return;
|
|
}
|
|
|
|
SMBSRV_TALLOC_IO_PTR(op, struct nttrans_op);
|
|
SMBSRV_SETUP_NTVFS_REQUEST(reply_nttrans_send, NTVFS_ASYNC_STATE_MAY_ASYNC);
|
|
|
|
trans = talloc(op, struct smb_nttrans);
|
|
if (trans == NULL) {
|
|
smbsrv_send_error(req, NT_STATUS_NO_MEMORY);
|
|
return;
|
|
}
|
|
|
|
op->trans = trans;
|
|
op->op_info = NULL;
|
|
op->send_fn = NULL;
|
|
|
|
trans->in.max_setup = CVAL(req->in.vwv, 0);
|
|
param_total = IVAL(req->in.vwv, 3);
|
|
data_total = IVAL(req->in.vwv, 7);
|
|
trans->in.max_param = IVAL(req->in.vwv, 11);
|
|
trans->in.max_data = IVAL(req->in.vwv, 15);
|
|
param_count = IVAL(req->in.vwv, 19);
|
|
param_ofs = IVAL(req->in.vwv, 23);
|
|
data_count = IVAL(req->in.vwv, 27);
|
|
data_ofs = IVAL(req->in.vwv, 31);
|
|
trans->in.setup_count = CVAL(req->in.vwv, 35);
|
|
trans->in.function = SVAL(req->in.vwv, 36);
|
|
|
|
if (req->in.wct != 19 + trans->in.setup_count) {
|
|
smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror));
|
|
return;
|
|
}
|
|
|
|
/* parse out the setup words */
|
|
trans->in.setup = talloc_array(req, uint16_t, trans->in.setup_count);
|
|
if (!trans->in.setup) {
|
|
smbsrv_send_error(req, NT_STATUS_NO_MEMORY);
|
|
return;
|
|
}
|
|
for (i=0;i<trans->in.setup_count;i++) {
|
|
trans->in.setup[i] = SVAL(req->in.vwv, VWV(19+i));
|
|
}
|
|
|
|
if (!req_pull_blob(req, req->in.hdr + param_ofs, param_count, &trans->in.params) ||
|
|
!req_pull_blob(req, req->in.hdr + data_ofs, data_count, &trans->in.data)) {
|
|
smbsrv_send_error(req, NT_STATUS_FOOBAR);
|
|
return;
|
|
}
|
|
|
|
/* is it a partial request? if so, then send a 'send more' message */
|
|
if (param_total > param_count ||
|
|
data_total > data_count) {
|
|
DEBUG(0,("REWRITE: not handling partial nttrans requests!\n"));
|
|
return;
|
|
}
|
|
|
|
SMBSRV_CALL_NTVFS_BACKEND(nttrans_backend(req, op));
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
Reply to an SMBnttranss request
|
|
****************************************************************************/
|
|
void smbsrv_reply_nttranss(struct smbsrv_request *req)
|
|
{
|
|
smbsrv_send_error(req, NT_STATUS_FOOBAR);
|
|
}
|