smbXcli: cp source3/libsmb/clitrans.c libcli/smb/smb1cli_trans.c

metze

1 files changed, 778 insertions, 0 deletions

diff --git a/libcli/smb/smb1cli_trans.c b/libcli/smb/smb1cli_trans.c
new file mode 100644
index 0000000000..5c73e2da74
--- /dev/null
+++ b/libcli/smb/smb1cli_trans.c
@@ -0,0 +1,778 @@
+/*
+   Unix SMB/CIFS implementation.
+   client transaction calls
+   Copyright (C) Andrew Tridgell 1994-1998
+
+   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 "libsmb/libsmb.h"
+#include "../lib/util/tevent_ntstatus.h"
+#include "async_smb.h"
+
+struct trans_recvblob {
+	uint8_t *data;
+	uint32_t max, total, received;
+};
+
+struct cli_trans_state {
+	struct cli_state *cli;
+	struct tevent_context *ev;
+	uint8_t cmd;
+	uint16_t mid;
+	const char *pipe_name;
+	uint8_t *pipe_name_conv;
+	size_t pipe_name_conv_len;
+	uint16_t fid;
+	uint16_t function;
+	int flags;
+	uint16_t *setup;
+	uint8_t num_setup, max_setup;
+	uint8_t *param;
+	uint32_t num_param, param_sent;
+	uint8_t *data;
+	uint32_t num_data, data_sent;
+
+	uint8_t num_rsetup;
+	uint16_t *rsetup;
+	struct trans_recvblob rparam;
+	struct trans_recvblob rdata;
+	uint16_t recv_flags2;
+
+	struct iovec iov[6];
+	uint8_t pad[4];
+	uint8_t zero_pad[4];
+	uint16_t vwv[32];
+
+	struct tevent_req *primary_subreq;
+};
+
+static void cli_trans_cleanup_primary(struct cli_trans_state *state)
+{
+	if (state->primary_subreq) {
+		cli_smb_req_set_mid(state->primary_subreq, 0);
+		cli_smb_req_unset_pending(state->primary_subreq);
+		TALLOC_FREE(state->primary_subreq);
+	}
+}
+
+static int cli_trans_state_destructor(struct cli_trans_state *state)
+{
+	cli_trans_cleanup_primary(state);
+	return 0;
+}
+
+static NTSTATUS cli_pull_trans(uint8_t *inbuf,
+			       uint8_t wct, uint16_t *vwv,
+			       uint16_t num_bytes, uint8_t *bytes,
+			       uint8_t smb_cmd, bool expect_first_reply,
+			       uint8_t *pnum_setup, uint16_t **psetup,
+			       uint32_t *ptotal_param, uint32_t *pnum_param,
+			       uint32_t *pparam_disp, uint8_t **pparam,
+			       uint32_t *ptotal_data, uint32_t *pnum_data,
+			       uint32_t *pdata_disp, uint8_t **pdata)
+{
+	uint32_t param_ofs, data_ofs;
+	uint8_t expected_num_setup;
+
+	if (expect_first_reply) {
+		if ((wct != 0) || (num_bytes != 0)) {
+			return NT_STATUS_INVALID_NETWORK_RESPONSE;
+		}
+		return NT_STATUS_OK;
+	}
+
+	switch (smb_cmd) {
+	case SMBtrans:
+	case SMBtrans2:
+		if (wct < 10) {
+			return NT_STATUS_INVALID_NETWORK_RESPONSE;
+		}
+		expected_num_setup = wct - 10;
+		*ptotal_param	= SVAL(vwv + 0, 0);
+		*ptotal_data	= SVAL(vwv + 1, 0);
+		*pnum_param	= SVAL(vwv + 3, 0);
+		param_ofs	= SVAL(vwv + 4, 0);
+		*pparam_disp	= SVAL(vwv + 5, 0);
+		*pnum_data	= SVAL(vwv + 6, 0);
+		data_ofs	= SVAL(vwv + 7, 0);
+		*pdata_disp	= SVAL(vwv + 8, 0);
+		*pnum_setup	= CVAL(vwv + 9, 0);
+		if (expected_num_setup < (*pnum_setup)) {
+			return NT_STATUS_INVALID_NETWORK_RESPONSE;
+		}
+		*psetup = vwv + 10;
+
+		break;
+	case SMBnttrans:
+		if (wct < 18) {
+			return NT_STATUS_INVALID_NETWORK_RESPONSE;
+		}
+		expected_num_setup = wct - 18;
+		*ptotal_param	= IVAL(vwv, 3);
+		*ptotal_data	= IVAL(vwv, 7);
+		*pnum_param	= IVAL(vwv, 11);
+		param_ofs	= IVAL(vwv, 15);
+		*pparam_disp	= IVAL(vwv, 19);
+		*pnum_data	= IVAL(vwv, 23);
+		data_ofs	= IVAL(vwv, 27);
+		*pdata_disp	= IVAL(vwv, 31);
+		*pnum_setup	= CVAL(vwv, 35);
+		if (expected_num_setup < (*pnum_setup)) {
+			return NT_STATUS_INVALID_NETWORK_RESPONSE;
+		}
+		*psetup		= vwv + 18;
+		break;
+
+	default:
+		return NT_STATUS_INTERNAL_ERROR;
+	}
+
+	/*
+	 * Check for buffer overflows. data_ofs needs to be checked against
+	 * the incoming buffer length, data_disp against the total
+	 * length. Likewise for param_ofs/param_disp.
+	 */
+
+	if (smb_buffer_oob(smb_len_nbt(inbuf), param_ofs, *pnum_param)
+	    || smb_buffer_oob(*ptotal_param, *pparam_disp, *pnum_param)
+	    || smb_buffer_oob(smb_len_nbt(inbuf), data_ofs, *pnum_data)
+	    || smb_buffer_oob(*ptotal_data, *pdata_disp, *pnum_data)) {
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+
+	*pparam = (uint8_t *)inbuf + 4 + param_ofs;
+	*pdata = (uint8_t *)inbuf + 4 + data_ofs;
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS cli_trans_pull_blob(TALLOC_CTX *mem_ctx,
+				    struct trans_recvblob *blob,
+				    uint32_t total, uint32_t thistime,
+				    uint8_t *buf, uint32_t displacement)
+{
+	if (blob->data == NULL) {
+		if (total > blob->max) {
+			return NT_STATUS_INVALID_NETWORK_RESPONSE;
+		}
+		blob->total = total;
+		blob->data = talloc_array(mem_ctx, uint8_t, total);
+		if (blob->data == NULL) {
+			return NT_STATUS_NO_MEMORY;
+		}
+	}
+
+	if (total > blob->total) {
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+
+	if (thistime) {
+		memcpy(blob->data + displacement, buf, thistime);
+		blob->received += thistime;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static void cli_trans_format(struct cli_trans_state *state, uint8_t *pwct,
+			     int *piov_count)
+{
+	struct cli_state *cli = state->cli;
+	uint8_t wct = 0;
+	struct iovec *iov = state->iov;
+	uint8_t *pad = state->pad;
+	uint16_t *vwv = state->vwv;
+	uint32_t param_offset;
+	uint32_t this_param = 0;
+	uint32_t param_pad;
+	uint32_t data_offset;
+	uint32_t this_data = 0;
+	uint32_t data_pad;
+	uint32_t useable_space;
+	uint8_t cmd;
+
+	cmd = state->cmd;
+
+	if ((state->param_sent != 0) || (state->data_sent != 0)) {
+		/* The secondary commands are one after the primary ones */
+		cmd += 1;
+	}
+
+	param_offset = MIN_SMB_SIZE;
+
+	switch (cmd) {
+	case SMBtrans:
+		if (cli_ucs2(state->cli)) {
+			pad[0] = 0;
+			iov[0].iov_base = (void *)pad;
+			iov[0].iov_len = 1;
+			param_offset += 1;
+			iov += 1;
+		}
+		iov[0].iov_base = (void *)state->pipe_name_conv;
+		iov[0].iov_len = state->pipe_name_conv_len;
+		wct = 14 + state->num_setup;
+		param_offset += iov[0].iov_len;
+		iov += 1;
+		break;
+	case SMBtrans2:
+		pad[0] = 0;
+		pad[1] = 'D'; /* Copy this from "old" 3.0 behaviour */
+		pad[2] = ' ';
+		iov[0].iov_base = (void *)pad;
+		iov[0].iov_len = 3;
+		wct = 14 + state->num_setup;
+		param_offset += 3;
+		iov += 1;
+		break;
+	case SMBtranss:
+		wct = 8;
+		break;
+	case SMBtranss2:
+		wct = 9;
+		break;
+	case SMBnttrans:
+		wct = 19 + state->num_setup;
+		break;
+	case SMBnttranss:
+		wct = 18;
+		break;
+	}
+
+	param_offset += wct * sizeof(uint16_t);
+	useable_space = cli_state_available_size(cli, param_offset);
+
+	param_pad = param_offset % 4;
+	if (param_pad > 0) {
+		param_pad = MIN(param_pad, useable_space);
+		iov[0].iov_base = (void *)state->zero_pad;
+		iov[0].iov_len = param_pad;
+		iov += 1;
+		param_offset += param_pad;
+	}
+	useable_space = cli_state_available_size(cli, param_offset);
+
+	if (state->param_sent < state->num_param) {
+		this_param = MIN(state->num_param - state->param_sent,
+				 useable_space);
+		iov[0].iov_base = (void *)(state->param + state->param_sent);
+		iov[0].iov_len = this_param;
+		iov += 1;
+	}
+
+	data_offset = param_offset + this_param;
+	useable_space = cli_state_available_size(cli, data_offset);
+
+	data_pad = data_offset % 4;
+	if (data_pad > 0) {
+		data_pad = MIN(data_pad, useable_space);
+		iov[0].iov_base = (void *)state->zero_pad;
+		iov[0].iov_len = data_pad;
+		iov += 1;
+		data_offset += data_pad;
+	}
+	useable_space = cli_state_available_size(cli, data_offset);
+
+	if (state->data_sent < state->num_data) {
+		this_data = MIN(state->num_data - state->data_sent,
+				useable_space);
+		iov[0].iov_base = (void *)(state->data + state->data_sent);
+		iov[0].iov_len = this_data;
+		iov += 1;
+	}
+
+	DEBUG(10, ("num_setup=%u, max_setup=%u, "
+		   "param_total=%u, this_param=%u, max_param=%u, "
+		   "data_total=%u, this_data=%u, max_data=%u, "
+		   "param_offset=%u, param_pad=%u, param_disp=%u, "
+		   "data_offset=%u, data_pad=%u, data_disp=%u\n",
+		   (unsigned)state->num_setup, (unsigned)state->max_setup,
+		   (unsigned)state->num_param, (unsigned)this_param,
+		   (unsigned)state->rparam.max,
+		   (unsigned)state->num_data, (unsigned)this_data,
+		   (unsigned)state->rdata.max,
+		   (unsigned)param_offset, (unsigned)param_pad,
+		   (unsigned)state->param_sent,
+		   (unsigned)data_offset, (unsigned)data_pad,
+		   (unsigned)state->data_sent));
+
+	switch (cmd) {
+	case SMBtrans:
+	case SMBtrans2:
+		SSVAL(vwv + 0, 0, state->num_param);
+		SSVAL(vwv + 1, 0, state->num_data);
+		SSVAL(vwv + 2, 0, state->rparam.max);
+		SSVAL(vwv + 3, 0, state->rdata.max);
+		SCVAL(vwv + 4, 0, state->max_setup);
+		SCVAL(vwv + 4, 1, 0);	/* reserved */
+		SSVAL(vwv + 5, 0, state->flags);
+		SIVAL(vwv + 6, 0, 0);	/* timeout */
+		SSVAL(vwv + 8, 0, 0);	/* reserved */
+		SSVAL(vwv + 9, 0, this_param);
+		SSVAL(vwv +10, 0, param_offset);
+		SSVAL(vwv +11, 0, this_data);
+		SSVAL(vwv +12, 0, data_offset);
+		SCVAL(vwv +13, 0, state->num_setup);
+		SCVAL(vwv +13, 1, 0);	/* reserved */
+		memcpy(vwv + 14, state->setup,
+		       sizeof(uint16_t) * state->num_setup);
+		break;
+	case SMBtranss:
+	case SMBtranss2:
+		SSVAL(vwv + 0, 0, state->num_param);
+		SSVAL(vwv + 1, 0, state->num_data);
+		SSVAL(vwv + 2, 0, this_param);
+		SSVAL(vwv + 3, 0, param_offset);
+		SSVAL(vwv + 4, 0, state->param_sent);
+		SSVAL(vwv + 5, 0, this_data);
+		SSVAL(vwv + 6, 0, data_offset);
+		SSVAL(vwv + 7, 0, state->data_sent);
+		if (cmd == SMBtranss2) {
+			SSVAL(vwv + 8, 0, state->fid);
+		}
+		break;
+	case SMBnttrans:
+		SCVAL(vwv + 0, 0, state->max_setup);
+		SSVAL(vwv + 0, 1, 0); /* reserved */
+		SIVAL(vwv + 1, 1, state->num_param);
+		SIVAL(vwv + 3, 1, state->num_data);
+		SIVAL(vwv + 5, 1, state->rparam.max);
+		SIVAL(vwv + 7, 1, state->rdata.max);
+		SIVAL(vwv + 9, 1, this_param);
+		SIVAL(vwv +11, 1, param_offset);
+		SIVAL(vwv +13, 1, this_data);
+		SIVAL(vwv +15, 1, data_offset);
+		SCVAL(vwv +17, 1, state->num_setup);
+		SSVAL(vwv +18, 0, state->function);
+		memcpy(vwv + 19, state->setup,
+		       sizeof(uint16_t) * state->num_setup);
+		break;
+	case SMBnttranss:
+		SSVAL(vwv + 0, 0, 0); /* reserved */
+		SCVAL(vwv + 1, 0, 0); /* reserved */
+		SIVAL(vwv + 1, 1, state->num_param);
+		SIVAL(vwv + 3, 1, state->num_data);
+		SIVAL(vwv + 5, 1, this_param);
+		SIVAL(vwv + 7, 1, param_offset);
+		SIVAL(vwv + 9, 1, state->param_sent);
+		SIVAL(vwv +11, 1, this_data);
+		SIVAL(vwv +13, 1, data_offset);
+		SIVAL(vwv +15, 1, state->data_sent);
+		SCVAL(vwv +17, 1, 0); /* reserved */
+		break;
+	}
+
+	state->param_sent += this_param;
+	state->data_sent += this_data;
+
+	*pwct = wct;
+	*piov_count = iov - state->iov;
+}
+
+static void cli_trans_done(struct tevent_req *subreq);
+
+struct tevent_req *cli_trans_send(
+	TALLOC_CTX *mem_ctx, struct tevent_context *ev,
+	struct cli_state *cli, uint8_t cmd,
+	const char *pipe_name, uint16_t fid, uint16_t function, int flags,
+	uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
+	uint8_t *param, uint32_t num_param, uint32_t max_param,
+	uint8_t *data, uint32_t num_data, uint32_t max_data)
+{
+	struct tevent_req *req, *subreq;
+	struct cli_trans_state *state;
+	int iov_count;
+	uint8_t wct;
+	NTSTATUS status;
+
+	req = tevent_req_create(mem_ctx, &state, struct cli_trans_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	if ((cmd == SMBtrans) || (cmd == SMBtrans2)) {
+		if ((num_param > 0xffff) || (max_param > 0xffff)
+		    || (num_data > 0xffff) || (max_data > 0xffff)) {
+			DEBUG(3, ("Attempt to send invalid trans2 request "
+				  "(setup %u, params %u/%u, data %u/%u)\n",
+				  (unsigned)num_setup,
+				  (unsigned)num_param, (unsigned)max_param,
+				  (unsigned)num_data, (unsigned)max_data));
+			tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
+			return tevent_req_post(req, ev);
+		}
+	}
+
+	/*
+	 * The largest wct will be for nttrans (19+num_setup). Make sure we
+	 * don't overflow state->vwv in cli_trans_format.
+	 */
+
+	if ((num_setup + 19) > ARRAY_SIZE(state->vwv)) {
+		tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
+		return tevent_req_post(req, ev);
+	}
+
+	state->cli = cli;
+	state->ev = ev;
+	state->cmd = cmd;
+	state->flags = flags;
+	state->num_rsetup = 0;
+	state->rsetup = NULL;
+	ZERO_STRUCT(state->rparam);
+	ZERO_STRUCT(state->rdata);
+
+	if ((pipe_name != NULL)
+	    && (!convert_string_talloc(state, CH_UNIX,
+				       cli_ucs2(cli) ? CH_UTF16LE : CH_DOS,
+				       pipe_name, strlen(pipe_name) + 1,
+				       &state->pipe_name_conv,
+				       &state->pipe_name_conv_len))) {
+		tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
+		return tevent_req_post(req, ev);
+	}
+	state->fid = fid;	/* trans2 */
+	state->function = function; /* nttrans */
+
+	state->setup = setup;
+	state->num_setup = num_setup;
+	state->max_setup = max_setup;
+
+	state->param = param;
+	state->num_param = num_param;
+	state->param_sent = 0;
+	state->rparam.max = max_param;
+
+	state->data = data;
+	state->num_data = num_data;
+	state->data_sent = 0;
+	state->rdata.max = max_data;
+
+	cli_trans_format(state, &wct, &iov_count);
+
+	subreq = cli_smb_req_create(state, ev, cli, cmd, 0, wct, state->vwv,
+				    iov_count, state->iov);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	status = cli_smb_req_send(subreq);
+	if (!NT_STATUS_IS_OK(status)) {
+		tevent_req_nterror(req, status);
+		return tevent_req_post(req, state->ev);
+	}
+	tevent_req_set_callback(subreq, cli_trans_done, req);
+
+	/*
+	 * Now get the MID of the primary request
+	 * and mark it as persistent. This means
+	 * we will able to send and receive multiple
+	 * SMB pdus using this MID in both directions
+	 * (including correct SMB signing).
+	 */
+	state->mid = cli_smb_req_mid(subreq);
+	cli_smb_req_set_mid(subreq, state->mid);
+	state->primary_subreq = subreq;
+	talloc_set_destructor(state, cli_trans_state_destructor);
+
+	return req;
+}
+
+static void cli_trans_done2(struct tevent_req *subreq);
+
+static void cli_trans_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct cli_trans_state *state = tevent_req_data(
+		req, struct cli_trans_state);
+	NTSTATUS status;
+	bool sent_all;
+	const uint8_t *inhdr;
+	uint8_t wct;
+	uint16_t *vwv;
+	uint32_t num_bytes;
+	uint8_t *bytes;
+	uint8_t *inbuf;
+	uint8_t num_setup	= 0;
+	uint16_t *setup		= NULL;
+	uint32_t total_param	= 0;
+	uint32_t num_param	= 0;
+	uint32_t param_disp	= 0;
+	uint32_t total_data	= 0;
+	uint32_t num_data	= 0;
+	uint32_t data_disp	= 0;
+	uint8_t *param		= NULL;
+	uint8_t *data		= NULL;
+
+	status = cli_smb_recv(subreq, state, &inbuf, 0, &wct, &vwv,
+			      &num_bytes, &bytes);
+	/*
+	 * Do not TALLOC_FREE(subreq) here, we might receive more than
+	 * one response for the same mid.
+	 */
+
+	/*
+	 * We can receive something like STATUS_MORE_ENTRIES, so don't use
+	 * !NT_STATUS_IS_OK(status) here.
+	 */
+
+	if (NT_STATUS_IS_ERR(status)) {
+		goto fail;
+	}
+	inhdr = inbuf + NBT_HDR_SIZE;
+
+	sent_all = ((state->param_sent == state->num_param)
+		    && (state->data_sent == state->num_data));
+
+	status = cli_pull_trans(
+		inbuf, wct, vwv, num_bytes, bytes,
+		state->cmd, !sent_all, &num_setup, &setup,
+		&total_param, &num_param, &param_disp, &param,
+		&total_data, &num_data, &data_disp, &data);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		goto fail;
+	}
+
+	if (!sent_all) {
+		int iov_count;
+		struct tevent_req *subreq2;
+
+		cli_trans_format(state, &wct, &iov_count);
+
+		subreq2 = cli_smb_req_create(state, state->ev, state->cli,
+					     state->cmd + 1, 0, wct, state->vwv,
+					     iov_count, state->iov);
+		if (tevent_req_nomem(subreq2, req)) {
+			return;
+		}
+		cli_smb_req_set_mid(subreq2, state->mid);
+
+		status = cli_smb_req_send(subreq2);
+
+		if (!NT_STATUS_IS_OK(status)) {
+			goto fail;
+		}
+		tevent_req_set_callback(subreq2, cli_trans_done2, req);
+
+		return;
+	}
+
+	status = cli_trans_pull_blob(
+		state, &state->rparam, total_param, num_param, param,
+		param_disp);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(10, ("Pulling params failed: %s\n", nt_errstr(status)));
+		goto fail;
+	}
+
+	status = cli_trans_pull_blob(
+		state, &state->rdata, total_data, num_data, data,
+		data_disp);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(10, ("Pulling data failed: %s\n", nt_errstr(status)));
+		goto fail;
+	}
+
+	if ((state->rparam.total == state->rparam.received)
+	    && (state->rdata.total == state->rdata.received)) {
+		state->recv_flags2 = SVAL(inhdr, HDR_FLG2);
+		cli_trans_cleanup_primary(state);
+		tevent_req_done(req);
+		return;
+	}
+
+	TALLOC_FREE(inbuf);
+
+	return;
+
+ fail:
+	cli_trans_cleanup_primary(state);
+	tevent_req_nterror(req, status);
+}
+
+static void cli_trans_done2(struct tevent_req *subreq2)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq2, struct tevent_req);
+	struct cli_trans_state *state = tevent_req_data(
+		req, struct cli_trans_state);
+	NTSTATUS status;
+	bool sent_all;
+	uint8_t wct;
+	uint32_t seqnum;
+
+	/*
+	 * First backup the seqnum of the secondary request
+	 * and attach it to the primary request.
+	 */
+	seqnum = cli_smb_req_seqnum(subreq2);
+	cli_smb_req_set_seqnum(state->primary_subreq, seqnum);
+
+	status = cli_smb_recv(subreq2, state, NULL, 0, &wct, NULL,
+			      NULL, NULL);
+	TALLOC_FREE(subreq2);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		goto fail;
+	}
+
+	if (wct != 0) {
+		status = NT_STATUS_INVALID_NETWORK_RESPONSE;
+		goto fail;
+	}
+
+	sent_all = ((state->param_sent == state->num_param)
+		    && (state->data_sent == state->num_data));
+
+	if (!sent_all) {
+		int iov_count;
+
+		cli_trans_format(state, &wct, &iov_count);
+
+		subreq2 = cli_smb_req_create(state, state->ev, state->cli,
+					     state->cmd + 1, 0, wct, state->vwv,
+					     iov_count, state->iov);
+		if (tevent_req_nomem(subreq2, req)) {
+			return;
+		}
+		cli_smb_req_set_mid(subreq2, state->mid);
+
+		status = cli_smb_req_send(subreq2);
+
+		if (!NT_STATUS_IS_OK(status)) {
+			goto fail;
+		}
+		tevent_req_set_callback(subreq2, cli_trans_done2, req);
+		return;
+	}
+
+	return;
+
+ fail:
+	cli_trans_cleanup_primary(state);
+	tevent_req_nterror(req, status);
+}
+
+NTSTATUS cli_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+			uint16_t *recv_flags2,
+			uint16_t **setup, uint8_t min_setup,
+			uint8_t *num_setup,
+			uint8_t **param, uint32_t min_param,
+			uint32_t *num_param,
+			uint8_t **data, uint32_t min_data,
+			uint32_t *num_data)
+{
+	struct cli_trans_state *state = tevent_req_data(
+		req, struct cli_trans_state);
+	NTSTATUS status;
+
+	cli_trans_cleanup_primary(state);
+
+	if (tevent_req_is_nterror(req, &status)) {
+		return status;
+	}
+
+	if ((state->num_rsetup < min_setup)
+	    || (state->rparam.total < min_param)
+	    || (state->rdata.total < min_data)) {
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+
+	if (recv_flags2 != NULL) {
+		*recv_flags2 = state->recv_flags2;
+	}
+
+	if (setup != NULL) {
+		*setup = talloc_move(mem_ctx, &state->rsetup);
+		*num_setup = state->num_rsetup;
+	} else {
+		TALLOC_FREE(state->rsetup);
+	}
+
+	if (param != NULL) {
+		*param = talloc_move(mem_ctx, &state->rparam.data);
+		*num_param = state->rparam.total;
+	} else {
+		TALLOC_FREE(state->rparam.data);
+	}
+
+	if (data != NULL) {
+		*data = talloc_move(mem_ctx, &state->rdata.data);
+		*num_data = state->rdata.total;
+	} else {
+		TALLOC_FREE(state->rdata.data);
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS cli_trans(TALLOC_CTX *mem_ctx, struct cli_state *cli,
+		   uint8_t trans_cmd,
+		   const char *pipe_name, uint16_t fid, uint16_t function,
+		   int flags,
+		   uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
+		   uint8_t *param, uint32_t num_param, uint32_t max_param,
+		   uint8_t *data, uint32_t num_data, uint32_t max_data,
+		   uint16_t *recv_flags2,
+		   uint16_t **rsetup, uint8_t min_rsetup, uint8_t *num_rsetup,
+		   uint8_t **rparam, uint32_t min_rparam, uint32_t *num_rparam,
+		   uint8_t **rdata, uint32_t min_rdata, uint32_t *num_rdata)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	struct tevent_context *ev;
+	struct tevent_req *req;
+	NTSTATUS status = NT_STATUS_OK;
+
+	if (cli_has_async_calls(cli)) {
+		/*
+		 * Can't use sync call while an async call is in flight
+		 */
+		status = NT_STATUS_INVALID_PARAMETER;
+		goto fail;
+	}
+
+	ev = tevent_context_init(frame);
+	if (ev == NULL) {
+		status = NT_STATUS_NO_MEMORY;
+		goto fail;
+	}
+
+	req = cli_trans_send(frame, ev, cli, trans_cmd,
+			     pipe_name, fid, function, flags,
+			     setup, num_setup, max_setup,
+			     param, num_param, max_param,
+			     data, num_data, max_data);
+	if (req == NULL) {
+		status = NT_STATUS_NO_MEMORY;
+		goto fail;
+	}
+
+	if (!tevent_req_poll(req, ev)) {
+		status = map_nt_error_from_unix_common(errno);
+		goto fail;
+	}
+
+	status = cli_trans_recv(req, mem_ctx, recv_flags2,
+				rsetup, min_rsetup, num_rsetup,
+				rparam, min_rparam, num_rparam,
+				rdata, min_rdata, num_rdata);
+ fail:
+	TALLOC_FREE(frame);
+	return status;
+}