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-rw-r--r--source4/smbd/nttrans.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/source4/smbd/nttrans.c b/source4/smbd/nttrans.c
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+++ b/source4/smbd/nttrans.c
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+/*
+ Unix SMB/CIFS implementation.
+ NT transaction handling
+ Copyright (C) Andrew Tridgell 2003
+ Copyright (C) James J Myers 2003 <myersjj@samba.org>
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+/*
+ This file handles the parsing of transact2 requests
+*/
+
+#include "includes.h"
+
+
+#define CHECK_MIN_BLOB_SIZE(blob, size) do { \
+ if ((blob)->length < (size)) { \
+ return NT_STATUS_INFO_LENGTH_MISMATCH; \
+ }} while (0)
+
+
+/* setup a nttrans reply, given the data and params sizes */
+static void nttrans_setup_reply(struct request_context *req,
+ struct smb_nttrans *trans,
+ uint16 param_size, uint16 data_size,
+ uint16 setup_count)
+{
+ trans->out.setup_count = setup_count;
+ if (setup_count != 0) {
+ trans->out.setup = talloc_zero(req->mem_ctx, sizeof(uint16) * setup_count);
+ }
+ trans->out.params = data_blob_talloc(req->mem_ctx, NULL, param_size);
+ trans->out.data = data_blob_talloc(req->mem_ctx, NULL, data_size);
+}
+
+
+/* parse NTTRANS_CREATE request
+ */
+static NTSTATUS nttrans_create(struct request_context *req,
+ struct smb_nttrans *trans)
+{
+ return NT_STATUS_FOOBAR;
+}
+
+/* parse NTTRANS_RENAME request
+ */
+static NTSTATUS nttrans_rename(struct request_context *req,
+ struct smb_nttrans *trans)
+{
+ return NT_STATUS_FOOBAR;
+}
+/* parse NTTRANS_IOCTL request
+ */
+static NTSTATUS nttrans_ioctl(struct request_context *req,
+ struct smb_nttrans *trans)
+{
+ union smb_ioctl nt;
+ uint32 function;
+ uint16 fnum;
+ uint8 filter;
+ BOOL fsctl;
+ DATA_BLOB *blob;
+
+ /* should have at least 4 setup words */
+ if (trans->in.setup_count != 4) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ function = IVAL(trans->in.setup, 0);
+ fnum = SVAL(trans->in.setup, 4);
+ fsctl = CVAL(trans->in.setup, 6);
+ filter = CVAL(trans->in.setup, 7);
+
+ blob = &trans->in.data;
+
+ nt.ntioctl.level = RAW_IOCTL_NTIOCTL;
+ nt.ntioctl.in.fnum = fnum;
+ nt.ntioctl.in.function = function;
+ nt.ntioctl.in.fsctl = fsctl;
+ nt.ntioctl.in.filter = filter;
+
+ nttrans_setup_reply(req, trans, 0, 0, 1);
+ trans->out.setup[0] = 0;
+
+ return req->conn->ntvfs_ops->ioctl(req, &nt);
+}
+
+/*
+ backend for nttrans requests
+*/
+static NTSTATUS nttrans_backend(struct request_context *req,
+ struct smb_nttrans *trans)
+{
+ DEBUG(9,("nttrans_backend: setup_count=%d function=%d\n",
+ trans->in.setup_count, trans->in.function));
+ /* must have at least one setup word */
+ if (trans->in.setup_count < 1) {
+ return NT_STATUS_FOOBAR;
+ }
+
+ /* the nttrans command is in function */
+ switch (trans->in.function) {
+ case NT_TRANSACT_CREATE:
+ return nttrans_create(req, trans);
+ case NT_TRANSACT_IOCTL:
+ return nttrans_ioctl(req, trans);
+ case NT_TRANSACT_RENAME:
+ return nttrans_rename(req, trans);
+ }
+
+ /* an unknown nttrans command */
+ return NT_STATUS_FOOBAR;
+}
+
+
+/****************************************************************************
+ Reply to an SMBnttrans request
+****************************************************************************/
+void reply_nttrans(struct request_context *req)
+{
+ struct smb_nttrans trans;
+ int i;
+ uint16 param_ofs, data_ofs;
+ uint16 param_count, data_count;
+ uint16 params_left, data_left;
+ uint16 param_total, data_total;
+ char *params, *data;
+ NTSTATUS status;
+
+ /* parse request */
+ if (req->in.wct < 19) {
+ req_reply_error(req, NT_STATUS_FOOBAR);
+ return;
+ }
+
+ 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) {
+ req_reply_dos_error(req, ERRSRV, ERRerror);
+ return;
+ }
+
+ /* parse out the setup words */
+ trans.in.setup = talloc(req->mem_ctx, trans.in.setup_count * sizeof(uint16));
+ if (!trans.in.setup) {
+ req_reply_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)) {
+ req_reply_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;
+ }
+
+ /* its a full request, give it to the backend */
+ status = nttrans_backend(req, &trans);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ req_reply_error(req, status);
+ return;
+ }
+
+ params_left = trans.out.params.length;
+ data_left = trans.out.data.length;
+ params = trans.out.params.data;
+ data = trans.out.data.data;
+
+ req->control_flags |= REQ_CONTROL_PROTECTED;
+
+ /* we need to divide up the reply into chunks that fit into
+ the negotiated buffer size */
+ do {
+ uint16 this_data, this_param, max_bytes;
+ uint_t align1 = 1, align2 = (params_left ? 2 : 0);
+
+ req_setup_reply(req, 18 + trans.out.setup_count, 0);
+
+ 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;
+ }
+
+ req_grow_data(req, this_param + this_data + (align1 + align2));
+
+ SIVAL(req->out.vwv, 3, trans.out.params.length);
+ SIVAL(req->out.vwv, 7, trans.out.data.length);
+
+ SIVAL(req->out.vwv, 11, this_param);
+ SIVAL(req->out.vwv, 15, align1 + PTR_DIFF(req->out.data, req->out.hdr));
+ SIVAL(req->out.vwv, 19, PTR_DIFF(params, trans.out.params.data));
+
+ SIVAL(req->out.vwv, 23, this_data);
+ SIVAL(req->out.vwv, 27, align1 + align2 +
+ PTR_DIFF(req->out.data + this_param, req->out.hdr));
+ SIVAL(req->out.vwv, 31, PTR_DIFF(data, trans.out.data.data));
+
+ SCVAL(req->out.vwv, 35, trans.out.setup_count);
+ for (i=0;i<trans.out.setup_count;i++) {
+ SSVAL(req->out.vwv, VWV(18+i)+1, trans.out.setup[i]);
+ }
+
+ memset(req->out.data, 0, align1);
+ if (this_param != 0) {
+ memcpy(req->out.data + align1, params, this_param);
+ }
+ memset(req->out.data+this_param+align1, 0, align2);
+ if (this_data != 0) {
+ memcpy(req->out.data+this_param+align1+align2, data, this_data);
+ }
+
+ params_left -= this_param;
+ data_left -= this_data;
+ params += this_param;
+ data += this_data;
+
+ /* if this is the last chunk then the request can be destroyed */
+ if (params_left == 0 && data_left == 0) {
+ req->control_flags &= ~REQ_CONTROL_PROTECTED;
+ }
+
+ req_send_reply(req);
+ } while (params_left != 0 || data_left != 0);
+}
+
+
+/****************************************************************************
+ Reply to an SMBnttranss request
+****************************************************************************/
+void reply_nttranss(struct request_context *req)
+{
+ req_reply_error(req, NT_STATUS_FOOBAR);
+}
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