s4:libcli/smb2: implement on top of smbXcli_conn/req

metze

12 files changed, 426 insertions, 867 deletions

diff --git a/source4/libcli/smb2/cancel.c b/source4/libcli/smb2/cancel.c
index 9fcb8cffb5..cc40b34a12 100644
--- a/source4/libcli/smb2/cancel.c
+++ b/source4/libcli/smb2/cancel.c
@@ -20,6 +20,7 @@
 */
 
 #include "includes.h"
+#include <tevent.h>
 #include "libcli/raw/libcliraw.h"
 #include "libcli/smb2/smb2.h"
 #include "libcli/smb2/smb2_calls.h"
@@ -29,50 +30,16 @@
 */
 NTSTATUS smb2_cancel(struct smb2_request *r)
 {
-	NTSTATUS status;
-	struct smb2_request *c;
-	uint32_t old_timeout;
-	uint64_t old_seqnum;
+	bool ok;
 
-	/* 
-	 * if we don't get a pending id yet, we just
-	 * mark the request for pending, so that we directly
-	 * send the cancel after getting the pending id
-	 */
-	if (!r->cancel.can_cancel) {
-		r->cancel.do_cancel++;
+	if (r->subreq == NULL) {
 		return NT_STATUS_OK;
 	}
 
-	/* we don't want a seqmun for a SMB2 Cancel */
-	old_seqnum = r->transport->seqnum;
-	c = smb2_request_init(r->transport, SMB2_OP_CANCEL, 0x04, false, 0);
-	r->transport->seqnum = old_seqnum;
-	NT_STATUS_HAVE_NO_MEMORY(c);
-	c->seqnum = 0;
-
-	SIVAL(c->out.hdr, SMB2_HDR_FLAGS,	0x00000002);
-	SSVAL(c->out.hdr, SMB2_HDR_CREDIT,	0x0030);
-	SBVAL(c->out.hdr, SMB2_HDR_ASYNC_ID,	r->cancel.async_id);
-	SBVAL(c->out.hdr, SMB2_HDR_MESSAGE_ID,	c->seqnum);
-	if (r->session) {
-		SBVAL(c->out.hdr, SMB2_HDR_SESSION_ID,	r->session->uid);
-		c->session = r->session;
-	}
-
-	SSVAL(c->out.body, 0x02, 0);
-
-	old_timeout = c->transport->options.request_timeout;
-	c->transport->options.request_timeout = 0;
-	smb2_transport_send(c);
-	c->transport->options.request_timeout = old_timeout;
-
-	if (c->state == SMB2_REQUEST_ERROR) {
-		status = c->status;
-	} else {
-		status = NT_STATUS_OK;
+	ok = tevent_req_cancel(r->subreq);
+	if (!ok) {
+		return NT_STATUS_INTERNAL_ERROR;
 	}
 
-	talloc_free(c);
-	return status;
+	return NT_STATUS_OK;
 }
diff --git a/source4/libcli/smb2/connect.c b/source4/libcli/smb2/connect.c
index 2e837287f5..0d97691a44 100644
--- a/source4/libcli/smb2/connect.c
+++ b/source4/libcli/smb2/connect.c
@@ -29,6 +29,7 @@
 #include "libcli/composite/composite.h"
 #include "libcli/resolve/resolve.h"
 #include "param/param.h"
+#include "../libcli/smb/smbXcli_base.h"
 
 struct smb2_connect_state {
 	struct tevent_context *ev;
@@ -40,7 +41,7 @@ struct smb2_connect_state {
 	const char *socket_options;
 	struct gensec_settings *gensec_settings;
 	struct smbcli_options options;
-	struct smb2_negprot negprot;
+	struct smb2_transport *transport;
 	struct smb2_tree_connect tcon;
 	struct smb2_session *session;
 	struct smb2_tree *tree;
@@ -132,7 +133,7 @@ static void smb2_connect_resolve_done(struct composite_context *creq)
 	creq->async.private_data = req;
 }
 
-static void smb2_connect_negprot_done(struct smb2_request *smb2req);
+static void smb2_connect_negprot_done(struct tevent_req *subreq);
 
 static void smb2_connect_socket_done(struct composite_context *creq)
 {
@@ -143,103 +144,52 @@ static void smb2_connect_socket_done(struct composite_context *creq)
 		tevent_req_data(req,
 		struct smb2_connect_state);
 	struct smbcli_socket *sock;
-	struct smb2_transport *transport;
-	struct smb2_request *smb2req;
+	struct tevent_req *subreq;
 	NTSTATUS status;
-	uint16_t dialects[3] = {
-		SMB2_DIALECT_REVISION_000,
-		SMB2_DIALECT_REVISION_202,
-		SMB2_DIALECT_REVISION_210
-	};
+	uint32_t timeout_msec;
 
 	status = smbcli_sock_connect_recv(creq, state, &sock);
 	if (tevent_req_nterror(req, status)) {
 		return;
 	}
 
-	transport = smb2_transport_init(sock, state, &state->options);
-	if (tevent_req_nomem(transport, req)) {
+	state->transport = smb2_transport_init(sock, state, &state->options);
+	if (tevent_req_nomem(state->transport, req)) {
 		return;
 	}
 
-	ZERO_STRUCT(state->negprot);
-	state->negprot.in.dialect_count = ARRAY_SIZE(dialects);
-	switch (transport->options.signing) {
-	case SMB_SIGNING_OFF:
-		state->negprot.in.security_mode = 0;
-		break;
-	case SMB_SIGNING_DEFAULT:
-	case SMB_SIGNING_IF_REQUIRED:
-		state->negprot.in.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
-		break;
-	case SMB_SIGNING_REQUIRED:
-		state->negprot.in.security_mode =
-			SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED;
-		break;
-	}
-	state->negprot.in.capabilities  = 0;
-	unix_to_nt_time(&state->negprot.in.start_time, time(NULL));
-	state->negprot.in.dialects = dialects;
+	timeout_msec = state->transport->options.request_timeout * 1000;
 
-	smb2req = smb2_negprot_send(transport, &state->negprot);
-	if (tevent_req_nomem(smb2req, req)) {
+	subreq = smbXcli_negprot_send(state, state->ev,
+				      state->transport->conn, timeout_msec,
+				      PROTOCOL_SMB2_02, PROTOCOL_SMB2_22);
+	if (tevent_req_nomem(subreq, req)) {
 		return;
 	}
-	smb2req->async.fn = smb2_connect_negprot_done;
-	smb2req->async.private_data = req;
+	tevent_req_set_callback(subreq, smb2_connect_negprot_done, req);
 }
 
 static void smb2_connect_session_done(struct tevent_req *subreq);
 
-static void smb2_connect_negprot_done(struct smb2_request *smb2req)
+static void smb2_connect_negprot_done(struct tevent_req *subreq)
 {
 	struct tevent_req *req =
-		talloc_get_type_abort(smb2req->async.private_data,
+		tevent_req_callback_data(subreq,
 		struct tevent_req);
 	struct smb2_connect_state *state =
 		tevent_req_data(req,
 		struct smb2_connect_state);
-	struct smb2_transport *transport = smb2req->transport;
-	struct tevent_req *subreq;
+	struct smb2_transport *transport = state->transport;
 	NTSTATUS status;
 
-	status = smb2_negprot_recv(smb2req, state, &state->negprot);
+	status = smbXcli_negprot_recv(subreq);
+	TALLOC_FREE(subreq);
 	if (tevent_req_nterror(req, status)) {
 		return;
 	}
 
-	transport->negotiate.secblob = state->negprot.out.secblob;
-	talloc_steal(transport, transport->negotiate.secblob.data);
-	transport->negotiate.system_time = state->negprot.out.system_time;
-	transport->negotiate.server_start_time = state->negprot.out.server_start_time;
-	transport->negotiate.security_mode = state->negprot.out.security_mode;
-	transport->negotiate.dialect_revision = state->negprot.out.dialect_revision;
-
-	switch (transport->options.signing) {
-	case SMB_SIGNING_OFF:
-		if (transport->negotiate.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
-			tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
-			return;
-		}
-		transport->signing_required = false;
-		break;
-	case SMB_SIGNING_DEFAULT:
-	case SMB_SIGNING_IF_REQUIRED:
-		if (transport->negotiate.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
-			transport->signing_required = true;
-		} else {
-			transport->signing_required = false;
-		}
-		break;
-	case SMB_SIGNING_REQUIRED:
-		if (transport->negotiate.security_mode & SMB2_NEGOTIATE_SIGNING_ENABLED) {
-			transport->signing_required = true;
-		} else {
-			tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
-			return;
-		}
-		break;
-	}
+	/* This is a hack... */
+	smb2cli_conn_set_max_credits(transport->conn, 30);
 
 	state->session = smb2_session_init(transport, state->gensec_settings, state, true);
 	if (tevent_req_nomem(state->session, req)) {
diff --git a/source4/libcli/smb2/logoff.c b/source4/libcli/smb2/logoff.c
index e3f83f27d8..12cd55311f 100644
--- a/source4/libcli/smb2/logoff.c
+++ b/source4/libcli/smb2/logoff.c
@@ -35,8 +35,6 @@ struct smb2_request *smb2_logoff_send(struct smb2_session *session)
 
 	req->session = session;
 
-	SBVAL(req->out.hdr,  SMB2_HDR_SESSION_ID, session->uid);
-
 	SSVAL(req->out.body, 0x02, 0);
 
 	smb2_transport_send(req);
diff --git a/source4/libcli/smb2/negprot.c b/source4/libcli/smb2/negprot.c
deleted file mode 100644
index 1ff4193499..0000000000
--- a/source4/libcli/smb2/negprot.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/* 
-   Unix SMB/CIFS implementation.
-
-   SMB2 client negprot handling
-
-   Copyright (C) Andrew Tridgell 2005
-   
-   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 "libcli/raw/libcliraw.h"
-#include "libcli/raw/raw_proto.h"
-#include "libcli/smb2/smb2.h"
-#include "libcli/smb2/smb2_calls.h"
-#include "librpc/ndr/libndr.h"
-
-/*
-  send a negprot request
-*/
-struct smb2_request *smb2_negprot_send(struct smb2_transport *transport, 
-				       struct smb2_negprot *io)
-{
-	struct smb2_request *req;
-	uint16_t size = 0x24 + io->in.dialect_count*2;
-	int i;
-	NTSTATUS status;
-
-	req = smb2_request_init(transport, SMB2_OP_NEGPROT, size, false, 0);
-	if (req == NULL) return NULL;
-
-
-	SSVAL(req->out.body, 0x00, 0x24);
-	SSVAL(req->out.body, 0x02, io->in.dialect_count);
-	SSVAL(req->out.body, 0x04, io->in.security_mode);
-	SSVAL(req->out.body, 0x06, io->in.reserved);
-	SIVAL(req->out.body, 0x08, io->in.capabilities);
-	status = smbcli_push_guid(req->out.body, 0x0C, &io->in.client_guid);
-	if (!NT_STATUS_IS_OK(status)) {
-		talloc_free(req);
-		return NULL;
-	}
-	smbcli_push_nttime(req->out.body, 0x1C, io->in.start_time);
-	for (i=0;i<io->in.dialect_count;i++) {
-		SSVAL(req->out.body, 0x24 + i*2, io->in.dialects[i]);		
-	}
-
-	smb2_transport_send(req);
-
-	return req;
-}
-
-/*
-  recv a negprot reply
-*/
-NTSTATUS smb2_negprot_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx, 
-			   struct smb2_negprot *io)
-{
-	NTSTATUS status;
-
-	if (!smb2_request_receive(req) ||
-	    smb2_request_is_error(req)) {
-		return smb2_request_destroy(req);
-	}
-
-	SMB2_CHECK_PACKET_RECV(req, 0x40, true);
-
-	io->out.security_mode      = SVAL(req->in.body, 0x02);
-	io->out.dialect_revision   = SVAL(req->in.body, 0x04);
-	io->out.reserved           = SVAL(req->in.body, 0x06);
-	status = smbcli_pull_guid(req->in.body, 0x08, &io->in.client_guid);
-	if (!NT_STATUS_IS_OK(status)) {
-		smb2_request_destroy(req);
-		return status;
-	}
-	io->out.capabilities       = IVAL(req->in.body, 0x18);
-	io->out.max_transact_size  = IVAL(req->in.body, 0x1C);
-	io->out.max_read_size      = IVAL(req->in.body, 0x20);
-	io->out.max_write_size     = IVAL(req->in.body, 0x24);
-	io->out.system_time        = smbcli_pull_nttime(req->in.body, 0x28);
-	io->out.server_start_time  = smbcli_pull_nttime(req->in.body, 0x30);
-	io->out.reserved2          = IVAL(req->in.body, 0x3C);
-
-	status = smb2_pull_o16s16_blob(&req->in, mem_ctx, req->in.body+0x38, &io->out.secblob);
-	if (!NT_STATUS_IS_OK(status)) {
-		smb2_request_destroy(req);
-		return status;
-	}
-
-	return smb2_request_destroy(req);
-}
-
-/*
-  sync negprot request
-*/
-NTSTATUS smb2_negprot(struct smb2_transport *transport, 
-		      TALLOC_CTX *mem_ctx, struct smb2_negprot *io)
-{
-	struct smb2_request *req = smb2_negprot_send(transport, io);
-	return smb2_negprot_recv(req, mem_ctx, io);
-}
diff --git a/source4/libcli/smb2/read.c b/source4/libcli/smb2/read.c
index 9d40e32a4d..ca487a74a1 100644
--- a/source4/libcli/smb2/read.c
+++ b/source4/libcli/smb2/read.c
@@ -44,6 +44,8 @@ struct smb2_request *smb2_read_send(struct smb2_tree *tree, struct smb2_read *io
 	SSVAL(req->out.body, 0x2C, io->in.channel_offset);
 	SSVAL(req->out.body, 0x2E, io->in.channel_length);
 
+	req->credit_charge = (MAX(io->in.length, 1) - 1)/ 65536 + 1;
+
 	smb2_transport_send(req);
 
 	return req;
diff --git a/source4/libcli/smb2/request.c b/source4/libcli/smb2/request.c
index cf416a61cf..fae995a396 100644
--- a/source4/libcli/smb2/request.c
+++ b/source4/libcli/smb2/request.c
@@ -42,18 +42,6 @@ void smb2_setup_bufinfo(struct smb2_request *req)
 	}
 }
 
-
-/* destroy a request structure */
-static int smb2_request_destructor(struct smb2_request *req)
-{
-	if (req->transport) {
-		/* remove it from the list of pending requests (a null op if
-		   its not in the list) */
-		DLIST_REMOVE(req->transport->pending_recv, req);
-	}
-	return 0;
-}
-
 /*
   initialise a smb2 request
 */
@@ -62,9 +50,7 @@ struct smb2_request *smb2_request_init(struct smb2_transport *transport, uint16_
 				       uint32_t body_dynamic_size)
 {
 	struct smb2_request *req;
-	uint64_t seqnum;
 	uint32_t hdr_offset;
-	uint32_t flags = 0;
 	bool compound = false;
 
 	if (body_dynamic_present) {
@@ -78,36 +64,17 @@ struct smb2_request *smb2_request_init(struct smb2_transport *transport, uint16_
 	req = talloc(transport, struct smb2_request);
 	if (req == NULL) return NULL;
 
-	seqnum = transport->seqnum;
-	if (transport->credits.charge > 0) {
-		transport->seqnum += transport->credits.charge;
-	} else {
-		transport->seqnum += 1;
-	}
-
 	req->state     = SMB2_REQUEST_INIT;
 	req->transport = transport;
 	req->session   = NULL;
 	req->tree      = NULL;
-	req->seqnum    = seqnum;
+	req->recv_iov  = NULL;
 	req->status    = NT_STATUS_OK;
 	req->async.fn  = NULL;
-	req->next = req->prev = NULL;
 
 	ZERO_STRUCT(req->cancel);
 	ZERO_STRUCT(req->in);
-
-	if (transport->compound.missing > 0) {
-		compound = true;
-		transport->compound.missing -= 1;
-		req->out = transport->compound.buffer;
-		ZERO_STRUCT(transport->compound.buffer);
-		if (transport->compound.related) {
-			flags |= SMB2_HDR_FLAG_CHAINED;
-		}
-	} else {
-		ZERO_STRUCT(req->out);
-	}
+	ZERO_STRUCT(req->out);
 
 	if (req->out.size > 0) {
 		hdr_offset = req->out.size;
@@ -133,13 +100,13 @@ struct smb2_request *smb2_request_init(struct smb2_transport *transport, uint16_
 
 	SIVAL(req->out.hdr, 0,				SMB2_MAGIC);
 	SSVAL(req->out.hdr, SMB2_HDR_LENGTH,		SMB2_HDR_BODY);
-	SSVAL(req->out.hdr, SMB2_HDR_EPOCH,		transport->credits.charge);
+	SSVAL(req->out.hdr, SMB2_HDR_CREDIT_CHARGE,	0);
 	SIVAL(req->out.hdr, SMB2_HDR_STATUS,		0);
 	SSVAL(req->out.hdr, SMB2_HDR_OPCODE,		opcode);
-	SSVAL(req->out.hdr, SMB2_HDR_CREDIT,		transport->credits.ask_num);
-	SIVAL(req->out.hdr, SMB2_HDR_FLAGS,		flags);
+	SSVAL(req->out.hdr, SMB2_HDR_CREDIT,		0);
+	SIVAL(req->out.hdr, SMB2_HDR_FLAGS,		0);
 	SIVAL(req->out.hdr, SMB2_HDR_NEXT_COMMAND,	0);
-	SBVAL(req->out.hdr, SMB2_HDR_MESSAGE_ID,	req->seqnum);
+	SBVAL(req->out.hdr, SMB2_HDR_MESSAGE_ID,	0);
 	SIVAL(req->out.hdr, SMB2_HDR_PID,		0);
 	SIVAL(req->out.hdr, SMB2_HDR_TID,		0);
 	SBVAL(req->out.hdr, SMB2_HDR_SESSION_ID,		0);
@@ -157,8 +124,6 @@ struct smb2_request *smb2_request_init(struct smb2_transport *transport, uint16_
 		SCVAL(req->out.dynamic, 0, 0);
 	}
 
-	talloc_set_destructor(req, smb2_request_destructor);
-
 	return req;
 }
 
@@ -174,7 +139,6 @@ struct smb2_request *smb2_request_init_tree(struct smb2_tree *tree, uint16_t opc
 						     body_dynamic_size);
 	if (req == NULL) return NULL;
 
-	SBVAL(req->out.hdr,  SMB2_HDR_SESSION_ID, tree->session->uid);
 	SIVAL(req->out.hdr,  SMB2_HDR_PID, tree->session->pid);
 	SIVAL(req->out.hdr,  SMB2_HDR_TID, tree->tid);
 	req->session = tree->session;
@@ -214,7 +178,7 @@ bool smb2_request_receive(struct smb2_request *req)
 
 	/* keep receiving packets until this one is replied to */
 	while (req->state <= SMB2_REQUEST_RECV) {
-		if (tevent_loop_once(req->transport->socket->event.ctx) != 0) {
+		if (tevent_loop_once(req->transport->ev) != 0) {
 			return false;
 		}
 	}
diff --git a/source4/libcli/smb2/session.c b/source4/libcli/smb2/session.c
index 74b8668462..e35a4734de 100644
--- a/source4/libcli/smb2/session.c
+++ b/source4/libcli/smb2/session.c
@@ -27,6 +27,8 @@
 #include "libcli/smb2/smb2.h"
 #include "libcli/smb2/smb2_calls.h"
 #include "auth/gensec/gensec.h"
+#include "../libcli/smb/smbXcli_base.h"
+#include "../source3/libsmb/smb2cli.h"
 
 /**
   initialise a smb2_session structure
@@ -50,8 +52,14 @@ struct smb2_session *smb2_session_init(struct smb2_transport *transport,
 
 	session->pid = getpid();
 
+	session->smbXcli = smbXcli_session_create(session, transport->conn);
+	if (session->smbXcli == NULL) {
+		talloc_free(session);
+		return NULL;
+	}
+
 	/* prepare a gensec context for later use */
-	status = gensec_client_start(session, &session->gensec, 
+	status = gensec_client_start(session, &session->gensec,
 				     settings);
 	if (!NT_STATUS_IS_OK(status)) {
 		talloc_free(session);
@@ -63,85 +71,16 @@ struct smb2_session *smb2_session_init(struct smb2_transport *transport,
 	return session;
 }
 
-/**
-  send a session setup request
-*/
-struct smb2_request *smb2_session_setup_send(struct smb2_session *session, 
-					     struct smb2_session_setup *io)
-{
-	struct smb2_request *req;
-	NTSTATUS status;
-	
-	req = smb2_request_init(session->transport, SMB2_OP_SESSSETUP, 
-				0x18, true, io->in.secblob.length);
-	if (req == NULL) return NULL;
-
-	SBVAL(req->out.hdr,  SMB2_HDR_SESSION_ID, session->uid);
-	SCVAL(req->out.body, 0x02, io->in.vc_number);
-	SCVAL(req->out.body, 0x03, io->in.security_mode);
-	SIVAL(req->out.body, 0x04, io->in.capabilities);
-	SIVAL(req->out.body, 0x08, io->in.channel);
-	SBVAL(req->out.body, 0x10, io->in.previous_sessionid);
-
-	req->session = session;
-
-	status = smb2_push_o16s16_blob(&req->out, 0x0C, io->in.secblob);
-	if (!NT_STATUS_IS_OK(status)) {
-		talloc_free(req);
-		return NULL;
-	}
-
-	smb2_transport_send(req);
-
-	return req;
-}
-
-
-/**
-  recv a session setup reply
-*/
-NTSTATUS smb2_session_setup_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx, 
-				 struct smb2_session_setup *io)
-{
-	NTSTATUS status;
-
-	if (!smb2_request_receive(req) || 
-	    (smb2_request_is_error(req) && 
-	     !NT_STATUS_EQUAL(req->status, NT_STATUS_MORE_PROCESSING_REQUIRED))) {
-		return smb2_request_destroy(req);
-	}
-
-	SMB2_CHECK_PACKET_RECV(req, 0x08, true);
-
-	io->out.session_flags = SVAL(req->in.body, 0x02);
-	io->out.uid           = BVAL(req->in.hdr,  SMB2_HDR_SESSION_ID);
-	
-	status = smb2_pull_o16s16_blob(&req->in, mem_ctx, req->in.body+0x04, &io->out.secblob);
-	if (!NT_STATUS_IS_OK(status)) {
-		smb2_request_destroy(req);
-		return status;
-	}
-
-	return smb2_request_destroy(req);
-}
-
-/*
-  sync session setup request
-*/
-NTSTATUS smb2_session_setup(struct smb2_session *session, 
-			    TALLOC_CTX *mem_ctx, struct smb2_session_setup *io)
-{
-	struct smb2_request *req = smb2_session_setup_send(session, io);
-	return smb2_session_setup_recv(req, mem_ctx, io);
-}
-
 struct smb2_session_setup_spnego_state {
-	struct smb2_session_setup io;
-	struct smb2_request *req;
+	struct tevent_context *ev;
+	struct smb2_session *session;
+	struct cli_credentials *credentials;
 	NTSTATUS gensec_status;
+	DATA_BLOB in_secblob;
+	DATA_BLOB out_secblob;
 };
 
-static void smb2_session_setup_spnego_handler(struct smb2_request *req);
+static void smb2_session_setup_spnego_done(struct tevent_req *subreq);
 
 /*
   a composite function that does a full SPNEGO session setup
@@ -154,24 +93,27 @@ struct tevent_req *smb2_session_setup_spnego_send(TALLOC_CTX *mem_ctx,
 	struct tevent_req *req;
 	struct smb2_session_setup_spnego_state *state;
 	const char *chosen_oid;
-	struct smb2_request *subreq;
+	struct tevent_req *subreq;
 	NTSTATUS status;
+	const DATA_BLOB *server_gss_blob;
+	DATA_BLOB negprot_secblob = data_blob_null;
+	uint32_t timeout_msec;
+
+	timeout_msec = session->transport->options.request_timeout * 1000;
 
 	req = tevent_req_create(mem_ctx, &state,
 				struct smb2_session_setup_spnego_state);
 	if (req == NULL) {
 		return NULL;
 	}
+	state->ev = ev;
+	state->session = session;
+	state->credentials = credentials;
 
-	ZERO_STRUCT(state->io);
-	state->io.in.vc_number          = 0;
-	if (session->transport->signing_required) {
-		state->io.in.security_mode =
-			SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED;
+	server_gss_blob = smbXcli_conn_server_gss_blob(session->transport->conn);
+	if (server_gss_blob) {
+		negprot_secblob = *server_gss_blob;
 	}
-	state->io.in.capabilities       = 0;
-	state->io.in.channel            = 0;
-	state->io.in.previous_sessionid = 0;
 
 	status = gensec_set_credentials(session->gensec, credentials);
 	if (tevent_req_nterror(req, status)) {
@@ -179,7 +121,7 @@ struct tevent_req *smb2_session_setup_spnego_send(TALLOC_CTX *mem_ctx,
 	}
 
 	status = gensec_set_target_hostname(session->gensec,
-					    session->transport->socket->hostname);
+					    smbXcli_conn_remote_name(session->transport->conn));
 	if (tevent_req_nterror(req, status)) {
 		return tevent_req_post(req, ev);
 	}
@@ -189,7 +131,7 @@ struct tevent_req *smb2_session_setup_spnego_send(TALLOC_CTX *mem_ctx,
 		return tevent_req_post(req, ev);
 	}
 
-	if (session->transport->negotiate.secblob.length > 0) {
+	if (negprot_secblob.length > 0) {
 		chosen_oid = GENSEC_OID_SPNEGO;
 	} else {
 		chosen_oid = GENSEC_OID_NTLMSSP;
@@ -201,21 +143,28 @@ struct tevent_req *smb2_session_setup_spnego_send(TALLOC_CTX *mem_ctx,
 	}
 
 	status = gensec_update(session->gensec, state,
-			       session->transport->socket->event.ctx,
-			       session->transport->negotiate.secblob,
-			       &state->io.in.secblob);
+			       state->ev,
+			       negprot_secblob,
+			       &state->in_secblob);
 	if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 		tevent_req_nterror(req, status);
 		return tevent_req_post(req, ev);
 	}
 	state->gensec_status = status;
 
-	subreq = smb2_session_setup_send(session, &state->io);
+	subreq = smb2cli_session_setup_send(state, state->ev,
+					    session->transport->conn,
+					    timeout_msec,
+					    session->smbXcli,
+					    0, /* in_flags */
+					    0, /* in_capabilities */
+					    0, /* in_channel */
+					    NULL, /* in_previous_session */
+					    &state->in_secblob);
 	if (tevent_req_nomem(subreq, req)) {
 		return tevent_req_post(req, ev);
 	}
-	subreq->async.fn = smb2_session_setup_spnego_handler;
-	subreq->async.private_data = req;
+	tevent_req_set_callback(subreq, smb2_session_setup_spnego_done, req);
 
 	return req;
 }
@@ -223,29 +172,38 @@ struct tevent_req *smb2_session_setup_spnego_send(TALLOC_CTX *mem_ctx,
 /*
   handle continuations of the spnego session setup
 */
-static void smb2_session_setup_spnego_handler(struct smb2_request *subreq)
+static void smb2_session_setup_spnego_done(struct tevent_req *subreq)
 {
 	struct tevent_req *req =
-		talloc_get_type_abort(subreq->async.private_data,
+		tevent_req_callback_data(subreq,
 		struct tevent_req);
 	struct smb2_session_setup_spnego_state *state =
 		tevent_req_data(req,
 		struct smb2_session_setup_spnego_state);
-	struct smb2_session *session = subreq->session;
+	struct smb2_session *session = state->session;
 	NTSTATUS peer_status;
 	NTSTATUS status;
+	struct iovec *recv_iov;
+	uint32_t timeout_msec;
+
+	timeout_msec = session->transport->options.request_timeout * 1000;
 
-	status = smb2_session_setup_recv(subreq, state, &state->io);
+	status = smb2cli_session_setup_recv(subreq, state,
+					    &recv_iov,
+					    &state->out_secblob);
+	if (!NT_STATUS_IS_OK(status) &&
+	    !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+		tevent_req_nterror(req, status);
+		return;
+	}
 	peer_status = status;
-	if (NT_STATUS_EQUAL(peer_status, NT_STATUS_MORE_PROCESSING_REQUIRED) ||
-	    (NT_STATUS_IS_OK(peer_status) &&
-	     NT_STATUS_EQUAL(state->gensec_status, NT_STATUS_MORE_PROCESSING_REQUIRED))) {
+
+	if (NT_STATUS_EQUAL(state->gensec_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 		status = gensec_update(session->gensec, state,
-				       session->transport->socket->event.ctx,
-				       state->io.out.secblob,
-				       &state->io.in.secblob);
+				       state->ev,
+				       state->out_secblob,
+				       &state->in_secblob);
 		state->gensec_status = status;
-		session->uid = state->io.out.uid;
 	}
 
 	if (!NT_STATUS_IS_OK(status) &&
@@ -254,30 +212,37 @@ static void smb2_session_setup_spnego_handler(struct smb2_request *subreq)
 		return;
 	}
 
-	if (NT_STATUS_EQUAL(peer_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
-		subreq = smb2_session_setup_send(session, &state->io);
-		if (tevent_req_nomem(subreq, req)) {
+	if (NT_STATUS_IS_OK(peer_status) && NT_STATUS_IS_OK(state->gensec_status)) {
+		status = gensec_session_key(session->gensec, session,
+					    &session->session_key);
+		if (tevent_req_nterror(req, status)) {
 			return;
 		}
 
-		subreq->async.fn = smb2_session_setup_spnego_handler;
-		subreq->async.private_data = req;
-		return;
-	}
-
-	gensec_session_key(session->gensec, session, &session->session_key);
-
-	if (session->transport->signing_required) {
-		if (session->session_key.length == 0) {
-			DEBUG(0,("Wrong session key length %u for SMB2 signing\n",
-				 (unsigned)session->session_key.length));
-			tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
+		status = smb2cli_session_update_session_key(session->smbXcli,
+							    session->session_key,
+							    recv_iov);
+		if (tevent_req_nterror(req, status)) {
 			return;
 		}
-		session->signing_active = true;
+
+		tevent_req_done(req);
+		return;
 	}
 
-	tevent_req_done(req);
+	subreq = smb2cli_session_setup_send(state, state->ev,
+					    session->transport->conn,
+					    timeout_msec,
+					    session->smbXcli,
+					    0, /* in_flags */
+					    0, /* in_capabilities */
+					    0, /* in_channel */
+					    NULL, /* in_previous_session */
+					    &state->in_secblob);
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, smb2_session_setup_spnego_done, req);
 }
 
 /*
@@ -298,7 +263,7 @@ NTSTATUS smb2_session_setup_spnego(struct smb2_session *session,
 	NTSTATUS status;
 	bool ok;
 	TALLOC_CTX *frame = talloc_stackframe();
-	struct tevent_context *ev = session->transport->socket->event.ctx;
+	struct tevent_context *ev = session->transport->ev;
 
 	if (frame == NULL) {
 		return NT_STATUS_NO_MEMORY;
diff --git a/source4/libcli/smb2/smb2.h b/source4/libcli/smb2/smb2.h
index aaafedd28f..e8ccdd9dc0 100644
--- a/source4/libcli/smb2/smb2.h
+++ b/source4/libcli/smb2/smb2.h
@@ -28,17 +28,6 @@
 struct smb2_handle;
 struct smb2_lease_break;
 
-/*
-  information returned from the negotiate process
-*/
-struct smb2_negotiate {
-	DATA_BLOB secblob;
-	NTTIME system_time;
-	NTTIME server_start_time;
-	uint16_t security_mode;
-	uint16_t dialect_revision;
-};
-
 struct smb2_request_buffer {
 	/* the raw SMB2 buffer, including the 4 byte length header */
 	uint8_t *buffer;
@@ -70,33 +59,15 @@ struct smb2_request_buffer {
 
 /* this is the context for the smb2 transport layer */
 struct smb2_transport {
-	/* socket level info */
-	struct smbcli_socket *socket;
-
-	struct smb2_negotiate negotiate;
-
-	/* next seqnum to allocate */
-	uint64_t seqnum;
+	struct tevent_context *ev; /* TODO: remove this !!! */
+	struct smbXcli_conn *conn;
 
 	/* the details for coumpounded requests */
 	struct {
-		uint32_t missing;
 		bool related;
-		struct smb2_request_buffer buffer;
+		struct tevent_req **reqs;
 	} compound;
 
-	struct {
-		uint16_t charge;
-		uint16_t ask_num;
-	} credits;
-
-	/* a list of requests that are pending for receive on this
-	   connection */
-	struct smb2_request *pending_recv;
-
-	/* context of the stream -> packet parser */
-	struct packet_context *packet;
-
 	/* an idle function - if this is defined then it will be
 	   called once every period microseconds while we are waiting
 	   for a packet */
@@ -123,10 +94,9 @@ struct smb2_transport {
 		/* private data passed to the oplock handler */
 		void *private_data;
 	} lease;
+	struct tevent_req *break_subreq;
 
 	struct smbcli_options options;
-
-	bool signing_required;
 };
 
 
@@ -144,10 +114,9 @@ struct smb2_tree {
 struct smb2_session {
 	struct smb2_transport *transport;
 	struct gensec_security *gensec;
-	uint64_t uid;
 	uint32_t pid;
 	DATA_BLOB session_key;
-	bool signing_active;
+	struct smbXcli_session *smbXcli;
 };
 
 
@@ -162,22 +131,17 @@ enum smb2_request_state {SMB2_REQUEST_INIT, /* we are creating the request */
 
 /* the context for a single SMB2 request */
 struct smb2_request {
-	/* allow a request to be part of a list of requests */
-	struct smb2_request *next, *prev;
-
 	/* each request is in one of 3 possible states */
 	enum smb2_request_state state;
 
+	struct tevent_req *subreq;
+
 	struct smb2_transport *transport;
 	struct smb2_session   *session;
 	struct smb2_tree      *tree;
 
-	uint64_t seqnum;
-
 	struct {
-		bool do_cancel;
 		bool can_cancel;
-		uint64_t async_id;
 	} cancel;
 
 	/* the NT status for this request. Set by packet receive code
@@ -186,6 +150,9 @@ struct smb2_request {
 
 	struct smb2_request_buffer in;
 	struct smb2_request_buffer out;
+	struct iovec *recv_iov;
+
+	uint16_t credit_charge;
 
 	/* information on what to do with a reply when it is received
 	   asyncronously. If this is not setup when a reply is received then
diff --git a/source4/libcli/smb2/tcon.c b/source4/libcli/smb2/tcon.c
index ec7152b264..c5e5b99f73 100644
--- a/source4/libcli/smb2/tcon.c
+++ b/source4/libcli/smb2/tcon.c
@@ -56,7 +56,6 @@ struct smb2_request *smb2_tree_connect_send(struct smb2_tree *tree,
 				0x08, true, 0);
 	if (req == NULL) return NULL;
 
-	SBVAL(req->out.hdr,  SMB2_HDR_SESSION_ID, tree->session->uid);
 	req->session = tree->session;
 
 	SSVAL(req->out.body, 0x02, io->in.reserved);
diff --git a/source4/libcli/smb2/transport.c b/source4/libcli/smb2/transport.c
index da0fba8e8e..01f363b0a0 100644
--- a/source4/libcli/smb2/transport.c
+++ b/source4/libcli/smb2/transport.c
@@ -20,6 +20,7 @@
 */
 
 #include "includes.h"
+#include "system/network.h"
 #include "libcli/raw/libcliraw.h"
 #include "libcli/raw/raw_proto.h"
 #include "libcli/smb2/smb2.h"
@@ -28,25 +29,7 @@
 #include "lib/events/events.h"
 #include "lib/stream/packet.h"
 #include "../lib/util/dlinklist.h"
-
-
-/*
-  an event has happened on the socket
-*/
-static void smb2_transport_event_handler(struct tevent_context *ev, 
-					 struct tevent_fd *fde, 
-					 uint16_t flags, void *private_data)
-{
-	struct smb2_transport *transport = talloc_get_type(private_data,
-							   struct smb2_transport);
-	if (flags & TEVENT_FD_READ) {
-		packet_recv(transport->packet);
-		return;
-	}
-	if (flags & TEVENT_FD_WRITE) {
-		packet_queue_run(transport->packet);
-	}
-}
+#include "../libcli/smb/smbXcli_base.h"
 
 /*
   destroy a transport
@@ -57,19 +40,6 @@ static int transport_destructor(struct smb2_transport *transport)
 	return 0;
 }
 
-
-/*
-  handle receive errors
-*/
-static void smb2_transport_error(void *private_data, NTSTATUS status)
-{
-	struct smb2_transport *transport = talloc_get_type(private_data,
-							   struct smb2_transport);
-	smb2_transport_dead(transport, status);
-}
-
-static NTSTATUS smb2_transport_finish_recv(void *private_data, DATA_BLOB blob);
-
 /*
   create a transport structure based on an established socket
 */
@@ -82,37 +52,24 @@ struct smb2_transport *smb2_transport_init(struct smbcli_socket *sock,
 	transport = talloc_zero(parent_ctx, struct smb2_transport);
 	if (!transport) return NULL;
 
-	transport->socket = talloc_steal(transport, sock);
+	transport->ev = sock->event.ctx;
 	transport->options = *options;
-	transport->credits.charge = 0;
-	transport->credits.ask_num = 1;
 
-	/* setup the stream -> packet parser */
-	transport->packet = packet_init(transport);
-	if (transport->packet == NULL) {
+	TALLOC_FREE(sock->event.fde);
+	TALLOC_FREE(sock->event.te);
+
+	transport->conn = smbXcli_conn_create(transport,
+					      sock->sock->fd,
+					      sock->hostname,
+					      options->signing,
+					      0, /* smb1_capabilities */
+					      NULL); /* client_guid */
+	if (transport->conn == NULL) {
 		talloc_free(transport);
 		return NULL;
 	}
-	packet_set_private(transport->packet, transport);
-	packet_set_socket(transport->packet, transport->socket->sock);
-	packet_set_callback(transport->packet, smb2_transport_finish_recv);
-	packet_set_full_request(transport->packet, packet_full_request_nbt);
-	packet_set_error_handler(transport->packet, smb2_transport_error);
-	packet_set_event_context(transport->packet, transport->socket->event.ctx);
-	packet_set_nofree(transport->packet);
-
-	/* take over event handling from the socket layer - it only
-	   handles events up until we are connected */
-	talloc_free(transport->socket->event.fde);
-	transport->socket->event.fde = tevent_add_fd(transport->socket->event.ctx,
-						    transport->socket,
-						    socket_get_fd(transport->socket->sock),
-						    TEVENT_FD_READ,
-						    smb2_transport_event_handler,
-						    transport);
-
-	packet_set_fde(transport->packet, transport->socket->event.fde);
-	packet_set_serialise(transport->packet);
+	sock->sock->fd = -1;
+	TALLOC_FREE(sock);
 
 	talloc_set_destructor(transport, transport_destructor);
 
@@ -124,431 +81,343 @@ struct smb2_transport *smb2_transport_init(struct smbcli_socket *sock,
 */
 void smb2_transport_dead(struct smb2_transport *transport, NTSTATUS status)
 {
-	smbcli_sock_dead(transport->socket);
-
 	if (NT_STATUS_EQUAL(NT_STATUS_UNSUCCESSFUL, status)) {
 		status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 	}
-
-	/* kill all pending receives */
-	while (transport->pending_recv) {
-		struct smb2_request *req = transport->pending_recv;
-		req->state = SMB2_REQUEST_ERROR;
-		req->status = status;
-		DLIST_REMOVE(transport->pending_recv, req);
-		if (req->async.fn) {
-			req->async.fn(req);
-		}
+	if (NT_STATUS_IS_OK(status)) {
+		status = NT_STATUS_LOCAL_DISCONNECT;
 	}
-}
 
-static NTSTATUS smb2_handle_oplock_break(struct smb2_transport *transport,
-					 const DATA_BLOB *blob)
-{
-	uint8_t *hdr;
-	uint8_t *body;
-	uint16_t len, bloblen;
-	bool lease;
+	smbXcli_conn_disconnect(transport->conn, status);
+}
 
-	hdr = blob->data+NBT_HDR_SIZE;
-	body = hdr+SMB2_HDR_BODY;
-	bloblen = blob->length - SMB2_HDR_BODY;
+static void smb2_request_done(struct tevent_req *subreq);
+static void smb2_transport_break_handler(struct tevent_req *subreq);
 
-	if (bloblen < 2) {
-		DEBUG(1,("Discarding smb2 oplock reply of size %u\n",
-			(unsigned)blob->length));
-		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+/*
+  put a request into the send queue
+*/
+void smb2_transport_send(struct smb2_request *req)
+{
+	NTSTATUS status;
+	struct smb2_transport *transport = req->transport;
+	struct tevent_req **reqs = transport->compound.reqs;
+	size_t num_reqs = talloc_array_length(reqs);
+	size_t i;
+	uint16_t cmd = SVAL(req->out.hdr, SMB2_HDR_OPCODE);
+	uint32_t additional_flags = IVAL(req->out.hdr, SMB2_HDR_FLAGS);
+	uint32_t clear_flags = 0;
+	uint32_t pid = IVAL(req->out.hdr, SMB2_HDR_PID);
+	uint32_t tid = IVAL(req->out.hdr, SMB2_HDR_TID);
+	struct smbXcli_session *session = NULL;
+	bool need_pending_break = false;
+	size_t hdr_ofs;
+	size_t pdu_len;
+	DATA_BLOB body = data_blob_null;
+	DATA_BLOB dyn = data_blob_null;
+	uint32_t timeout_msec = transport->options.request_timeout * 1000;
+
+	if (transport->oplock.handler) {
+		need_pending_break = true;
+	}
+
+	if (transport->lease.handler) {
+		need_pending_break = true;
+	}
+
+	if (transport->break_subreq) {
+		need_pending_break = false;
+	}
+
+	if (need_pending_break) {
+		struct tevent_req *subreq;
+
+		subreq = smb2cli_req_create(transport,
+					    transport->ev,
+					    transport->conn,
+					    SMB2_OP_BREAK,
+					    0, /* additional_flags */
+					    0, /*clear_flags */
+					    0, /* timeout_msec */
+					    0, /* pid */
+					    0, /* tid */
+					    NULL, /* session */
+					    NULL, /* body */
+					    0, /* body_fixed */
+					    NULL, /* dyn */
+					    0); /* dyn_len */
+		if (subreq != NULL) {
+			smbXcli_req_set_pending(subreq);
+			tevent_req_set_callback(subreq,
+						smb2_transport_break_handler,
+						transport);
+			transport->break_subreq = subreq;
+		}
 	}
 
-	len = CVAL(body, 0x00);
-	if (len > bloblen) {
-		DEBUG(1,("Discarding smb2 oplock reply,"
-			"packet claims %u byte body, only %u bytes seen\n",
-			len, bloblen));
-		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	if (req->session) {
+		session = req->session->smbXcli;
 	}
 
-	if (len == 24) {
-		lease = false;
-	} else if (len == 44) {
-		lease = true;
-	} else {
-		DEBUG(1,("Discarding smb2 oplock reply of invalid size %u\n",
-			(unsigned)blob->length));
-		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	if (transport->compound.related) {
+		additional_flags |= SMB2_HDR_FLAG_CHAINED;
 	}
 
-	if (!lease && transport->oplock.handler) {
-		struct smb2_handle h;
-		uint8_t level;
-
-		level = CVAL(body, 0x02);
-		smb2_pull_handle(body+0x08, &h);
-
-		transport->oplock.handler(transport, &h, level,
-					  transport->oplock.private_data);
-	} else if (lease && transport->lease.handler) {
-		struct smb2_lease_break lb;
+	hdr_ofs = PTR_DIFF(req->out.hdr, req->out.buffer);
+	pdu_len = req->out.size - hdr_ofs;
+	body.data = req->out.body;
+	body.length = req->out.body_fixed;
+	dyn.data = req->out.body + req->out.body_fixed;
+	dyn.length = pdu_len - (SMB2_HDR_BODY + req->out.body_fixed);
 
-		ZERO_STRUCT(lb);
-		lb.break_flags =		SVAL(body, 0x4);
-		memcpy(&lb.current_lease.lease_key, body+0x8,
-		    sizeof(struct smb2_lease_key));
-		lb.current_lease.lease_state = 	SVAL(body, 0x18);
-		lb.new_lease_state =		SVAL(body, 0x1C);
-		lb.break_reason =		SVAL(body, 0x20);
-		lb.access_mask_hint = 		SVAL(body, 0x24);
-		lb.share_mask_hint = 		SVAL(body, 0x28);
-
-		transport->lease.handler(transport, &lb,
-		    transport->lease.private_data);
-	} else {
-		DEBUG(5,("Got SMB2 %s break with no handler\n",
-			lease ? "lease" : "oplock"));
+	req->subreq = smb2cli_req_create(req,
+					 transport->ev,
+					 transport->conn,
+					 cmd,
+					 additional_flags,
+					 clear_flags,
+					 timeout_msec,
+					 pid,
+					 tid,
+					 session,
+					 body.data, body.length,
+					 dyn.data, dyn.length);
+	if (req->subreq == NULL) {
+		req->state = SMB2_REQUEST_ERROR;
+		req->status = NT_STATUS_NO_MEMORY;
+		return;
 	}
 
-	return NT_STATUS_OK;
-}
-
-struct smb2_transport_compount_response_state {
-	struct smb2_transport *transport;
-	DATA_BLOB blob;
-};
-
-static void smb2_transport_compound_response_handler(struct tevent_context *ctx,
-						     struct tevent_immediate *im,
-						     void *private_data)
-{
-	struct smb2_transport_compount_response_state *state =
-		talloc_get_type_abort(private_data,
-		struct smb2_transport_compount_response_state);
-	struct smb2_transport *transport = state->transport;
-	NTSTATUS status;
-
-	status = smb2_transport_finish_recv(transport, state->blob);
-	TALLOC_FREE(state);
-	if (!NT_STATUS_IS_OK(status)) {
-		smb2_transport_error(transport, status);
+	if (!tevent_req_is_in_progress(req->subreq)) {
+		req->state = SMB2_REQUEST_ERROR;
+		req->status = NT_STATUS_INTERNAL_ERROR;/* TODO */
+		return;
 	}
-}
 
-/*
-  we have a full request in our receive buffer - match it to a pending request
-  and process
- */
-static NTSTATUS smb2_transport_finish_recv(void *private_data, DATA_BLOB blob)
-{
-	struct smb2_transport *transport = talloc_get_type(private_data,
-							     struct smb2_transport);
-	uint8_t *buffer, *hdr;
-	int len;
-	struct smb2_request *req = NULL;
-	uint64_t seqnum;
-	uint32_t flags;
-	uint16_t buffer_code;
-	uint32_t dynamic_size;
-	uint32_t i;
-	uint16_t opcode;
-	NTSTATUS status;
-	uint32_t next_ofs;
-
-	buffer = blob.data;
-	len = blob.length;
-
-	hdr = buffer+NBT_HDR_SIZE;
+	tevent_req_set_callback(req->subreq, smb2_request_done, req);
 
-	if (len < SMB2_MIN_SIZE) {
-		DEBUG(1,("Discarding smb2 reply of size %d\n", len));
-		goto error;
+	smb2cli_req_set_notify_async(req->subreq);
+	if (req->credit_charge) {
+		smb2cli_req_set_credit_charge(req->subreq, req->credit_charge);
 	}
 
-	flags	= IVAL(hdr, SMB2_HDR_FLAGS);
-	seqnum	= BVAL(hdr, SMB2_HDR_MESSAGE_ID);
-	opcode	= SVAL(hdr, SMB2_HDR_OPCODE);
+	ZERO_STRUCT(req->out);
+	req->state = SMB2_REQUEST_RECV;
 
-	/* see MS-SMB2 3.2.5.19 */
-	if (seqnum == UINT64_MAX) {
-		if (opcode != SMB2_OP_BREAK) {
-			DEBUG(1,("Discarding packet with invalid seqnum, "
-				"opcode %u\n", opcode));
-			return NT_STATUS_INVALID_NETWORK_RESPONSE;
-		}
+	if (num_reqs > 0) {
+		for (i=0; i < num_reqs; i++) {
+			if (reqs[i] != NULL) {
+				continue;
+			}
 
-		return smb2_handle_oplock_break(transport, &blob);
-	}
+			reqs[i] = req->subreq;
+			i++;
+			break;
+		}
 
-	if (opcode == SMB2_OP_CANCEL) {
-		/*
-		 * ignore responses to cancel requests,
-		 * this can happen if signing was wrong or
-		 * we specified the wrong session id
-		 */
-		talloc_free(buffer);
-		return NT_STATUS_OK;
+		if (i < num_reqs) {
+			return;
+		}
+	} else {
+		reqs = &req->subreq;
+		num_reqs = 1;
 	}
+	status = smb2cli_req_compound_submit(reqs, num_reqs);
 
-	/* match the incoming request against the list of pending requests */
-	for (req=transport->pending_recv; req; req=req->next) {
-		if (req->seqnum == seqnum) break;
-	}
+	TALLOC_FREE(transport->compound.reqs);
 
-	if (!req) {
-		DEBUG(1,("Discarding unmatched reply with seqnum 0x%llx op %d\n", 
-			 (long long)seqnum, SVAL(hdr, SMB2_HDR_OPCODE)));
-		goto error;
+	if (!NT_STATUS_IS_OK(status)) {
+		smbXcli_conn_disconnect(transport->conn, status);
 	}
+}
 
-	/* fill in the 'in' portion of the matching request */
-	req->in.buffer = buffer;
-	talloc_steal(req, buffer);
-	req->in.size = len;
-	req->in.allocated = req->in.size;
+static void smb2_request_done(struct tevent_req *subreq)
+{
+	struct smb2_request *req =
+		tevent_req_callback_data(subreq,
+		struct smb2_request);
+	ssize_t len;
+	size_t i;
 
-	req->in.hdr       = hdr;
-	req->in.body      = hdr+SMB2_HDR_BODY;
-	req->in.body_size = req->in.size - (SMB2_HDR_BODY+NBT_HDR_SIZE);
-	req->status       = NT_STATUS(IVAL(hdr, SMB2_HDR_STATUS));
+	req->recv_iov = NULL;
 
-	if ((flags & SMB2_HDR_FLAG_ASYNC) &&
-	    NT_STATUS_EQUAL(req->status, STATUS_PENDING)) {
+	req->status = smb2cli_req_recv(req->subreq, req, &req->recv_iov, NULL, 0);
+	if (NT_STATUS_EQUAL(req->status, STATUS_PENDING)) {
 		req->cancel.can_cancel = true;
-		req->cancel.async_id = BVAL(hdr, SMB2_HDR_ASYNC_ID);
-		for (i=0; i< req->cancel.do_cancel; i++) {
-			smb2_cancel(req);
-		}
-		talloc_free(buffer);
-		return NT_STATUS_OK;
-	}
-
-	next_ofs = IVAL(req->in.hdr, SMB2_HDR_NEXT_COMMAND);
-	if (next_ofs > 0) {
-		if (smb2_oob(&req->in, req->in.hdr + next_ofs, SMB2_HDR_BODY + 2)) {
-			DEBUG(1,("SMB2 request invalid next offset 0x%x\n",
-				 next_ofs));
-			goto error;
-		}
-
-		req->in.size = NBT_HDR_SIZE + next_ofs;
-		req->in.body_size = req->in.size - (SMB2_HDR_BODY+NBT_HDR_SIZE);
-	}
-
-	if (req->session && req->session->signing_active &&
-	    !NT_STATUS_EQUAL(req->status, NT_STATUS_USER_SESSION_DELETED)) {
-		status = smb2_check_signature(&req->in, 
-					      req->session->session_key);
-		if (!NT_STATUS_IS_OK(status)) {
-			/* the spec says to ignore packets with a bad signature */
-			talloc_free(buffer);
-			return status;
-		}
+		return;
 	}
-
-	buffer_code = SVAL(req->in.body, 0);
-	req->in.body_fixed = (buffer_code & ~1);
-	req->in.dynamic = NULL;
-	dynamic_size = req->in.body_size - req->in.body_fixed;
-	if (dynamic_size != 0 && (buffer_code & 1)) {
-		req->in.dynamic = req->in.body + req->in.body_fixed;
-		if (smb2_oob(&req->in, req->in.dynamic, dynamic_size)) {
-			DEBUG(1,("SMB2 request invalid dynamic size 0x%x\n", 
-				 dynamic_size));
-			goto error;
+	TALLOC_FREE(req->subreq);
+	if (!NT_STATUS_IS_OK(req->status)) {
+		if (req->recv_iov == NULL) {
+			req->state = SMB2_REQUEST_ERROR;
+			if (req->async.fn) {
+				req->async.fn(req);
+			}
+			return;
 		}
 	}
 
-	smb2_setup_bufinfo(req);
-
-	DEBUG(2, ("SMB2 RECV seqnum=0x%llx\n", (long long)req->seqnum));
-	dump_data(5, req->in.body, req->in.body_size);
+	len = req->recv_iov[0].iov_len;
+	for (i=1; i < 3; i++) {
+		uint8_t *p = req->recv_iov[i-1].iov_base;
+		uint8_t *c1 = req->recv_iov[i].iov_base;
+		uint8_t *c2 = p + req->recv_iov[i-1].iov_len;
 
-	if (next_ofs > 0) {
-		struct tevent_immediate *im;
-		struct smb2_transport_compount_response_state *state;
+		len += req->recv_iov[i].iov_len;
 
-		state = talloc(transport,
-			       struct smb2_transport_compount_response_state);
-		if (!state) {
-			goto error;
+		if (req->recv_iov[i].iov_len == 0) {
+			continue;
 		}
-		state->transport = transport;
 
-		state->blob = data_blob_talloc(state, NULL,
-					       blob.length - next_ofs);
-		if (!state->blob.data) {
-			goto error;
-		}
-		im = tevent_create_immediate(state);
-		if (!im) {
-			TALLOC_FREE(state);
-			goto error;
+		if (c1 != c2) {
+			req->status = NT_STATUS_INTERNAL_ERROR;
+			req->state = SMB2_REQUEST_ERROR;
+			if (req->async.fn) {
+				req->async.fn(req);
+			}
+			return;
 		}
-		_smb_setlen_tcp(state->blob.data, state->blob.length - NBT_HDR_SIZE);
-		memcpy(state->blob.data + NBT_HDR_SIZE,
-		       req->in.hdr + next_ofs,
-		       req->in.allocated - req->in.size);
-		tevent_schedule_immediate(im, transport->socket->event.ctx,
-					  smb2_transport_compound_response_handler,
-					  state);
 	}
 
-	/* if this request has an async handler then call that to
-	   notify that the reply has been received. This might destroy
-	   the request so it must happen last */
-	DLIST_REMOVE(transport->pending_recv, req);
-	req->state = SMB2_REQUEST_DONE;
-	if (req->async.fn) {
-		req->async.fn(req);
-	}
-	return NT_STATUS_OK;
+	req->in.buffer = req->recv_iov[0].iov_base;
+	req->in.size = len;
+	req->in.allocated = req->in.size;
 
-error:
-	dump_data(5, buffer, len);
-	if (req) {
-		DLIST_REMOVE(transport->pending_recv, req);
-		req->state = SMB2_REQUEST_ERROR;
-		if (req->async.fn) {
-			req->async.fn(req);
-		}
-	} else {
-		talloc_free(buffer);
-	}
-	return NT_STATUS_UNSUCCESSFUL;
-}
+	req->in.hdr        =  req->recv_iov[0].iov_base;
+	req->in.body       =  req->recv_iov[1].iov_base;
+	req->in.dynamic    =  req->recv_iov[2].iov_base;
+	req->in.body_fixed =  req->recv_iov[1].iov_len;
+	req->in.body_size  =  req->in.body_fixed;
+	req->in.body_size  += req->recv_iov[2].iov_len;
 
-/*
-  handle timeouts of individual smb requests
-*/
-static void smb2_timeout_handler(struct tevent_context *ev, struct tevent_timer *te, 
-				 struct timeval t, void *private_data)
-{
-	struct smb2_request *req = talloc_get_type(private_data, struct smb2_request);
+	smb2_setup_bufinfo(req);
 
-	if (req->state == SMB2_REQUEST_RECV) {
-		DLIST_REMOVE(req->transport->pending_recv, req);
-	}
-	req->status = NT_STATUS_IO_TIMEOUT;
-	req->state = SMB2_REQUEST_ERROR;
+	req->state = SMB2_REQUEST_DONE;
 	if (req->async.fn) {
 		req->async.fn(req);
 	}
 }
 
-
-/*
-  destroy a request
-*/
-static int smb2_request_destructor(struct smb2_request *req)
-{
-	if (req->state == SMB2_REQUEST_RECV) {
-		DLIST_REMOVE(req->transport->pending_recv, req);
-	}
-	return 0;
-}
-
-static NTSTATUS smb2_transport_raw_send(struct smb2_transport *transport,
-					struct smb2_request_buffer *buffer)
+static void smb2_transport_break_handler(struct tevent_req *subreq)
 {
-	DATA_BLOB blob;
+	struct smb2_transport *transport =
+		tevent_req_callback_data(subreq,
+		struct smb2_transport);
 	NTSTATUS status;
+	uint8_t *hdr;
+	uint8_t *body;
+	uint16_t len = 0;
+	bool lease;
+	struct iovec *recv_iov = NULL;
 
-	/* check if the transport is dead */
-	if (transport->socket->sock == NULL) {
-		return NT_STATUS_NET_WRITE_FAULT;
-	}
+	transport->break_subreq = NULL;
 
-	_smb_setlen_tcp(buffer->buffer, buffer->size - NBT_HDR_SIZE);
-	blob = data_blob_const(buffer->buffer, buffer->size);
-	status = packet_send(transport->packet, blob);
+	status = smb2cli_req_recv(subreq, transport, &recv_iov, NULL, 0);
+	TALLOC_FREE(subreq);
 	if (!NT_STATUS_IS_OK(status)) {
-		return status;
+		TALLOC_FREE(recv_iov);
+		smb2_transport_dead(transport, status);
+		return;
 	}
 
-	return NT_STATUS_OK;
-}
-
-/*
-  put a request into the send queue
-*/
-void smb2_transport_send(struct smb2_request *req)
-{
-	NTSTATUS status;
-
-	DEBUG(2, ("SMB2 send seqnum=0x%llx\n", (long long)req->seqnum));
-	dump_data(5, req->out.body, req->out.body_size);
+	/*
+	 * Setup the subreq to handle the
+	 * next incoming SMB2 Break.
+	 */
+	subreq = smb2cli_req_create(transport,
+				    transport->ev,
+				    transport->conn,
+				    SMB2_OP_BREAK,
+				    0, /* additional_flags */
+				    0, /*clear_flags */
+				    0, /* timeout_msec */
+				    0, /* pid */
+				    0, /* tid */
+				    NULL, /* session */
+				    NULL, /* body */
+				    0, /* body_fixed */
+				    NULL, /* dyn */
+				    0); /* dyn_len */
+	if (subreq != NULL) {
+		smbXcli_req_set_pending(subreq);
+		tevent_req_set_callback(subreq,
+					smb2_transport_break_handler,
+					transport);
+		transport->break_subreq = subreq;
+	}
+
+	hdr = recv_iov[0].iov_base;
+	body = recv_iov[1].iov_base;
+
+	len = recv_iov[1].iov_len;
+	if (recv_iov[1].iov_len >= 2) {
+		len = CVAL(body, 0x00);
+		if (len != recv_iov[1].iov_len) {
+			len = recv_iov[1].iov_len;
+		}
+	}
 
-	if (req->transport->compound.missing > 0) {
-		off_t next_ofs;
-		size_t pad = 0;
-		uint8_t *end;
+	if (len == 24) {
+		lease = false;
+	} else if (len == 44) {
+		lease = true;
+	} else {
+		DEBUG(1,("Discarding smb2 oplock reply of invalid size %u\n",
+			(unsigned)len));
+		TALLOC_FREE(recv_iov);
+		status = NT_STATUS_INVALID_NETWORK_RESPONSE;
+		smb2_transport_dead(transport, status);
+		return;
+	}
 
-		end = req->out.buffer + req->out.size;
+	if (!lease && transport->oplock.handler) {
+		struct smb2_handle h;
+		uint8_t level;
 
-		/*
-		 * we need to set dynamic otherwise
-		 * smb2_grow_buffer segfaults
-		 */
-		if (req->out.dynamic == NULL) {
-			req->out.dynamic = end;
-		}
+		level = CVAL(body, 0x02);
+		smb2_pull_handle(body+0x08, &h);
 
-		next_ofs = end - req->out.hdr;
-		if ((next_ofs % 8) > 0) {
-			pad = 8 - (next_ofs % 8);
-		}
-		next_ofs += pad;
+		TALLOC_FREE(recv_iov);
 
-		status = smb2_grow_buffer(&req->out, pad);
-		if (!NT_STATUS_IS_OK(status)) {
-			req->state = SMB2_REQUEST_ERROR;
-			req->status = status;
-			return;
-		}
-		req->out.size += pad;
+		transport->oplock.handler(transport, &h, level,
+					  transport->oplock.private_data);
+	} else if (lease && transport->lease.handler) {
+		struct smb2_lease_break lb;
 
-		SIVAL(req->out.hdr, SMB2_HDR_NEXT_COMMAND, next_ofs);
-	}
+		ZERO_STRUCT(lb);
+		lb.break_flags =		SVAL(body, 0x4);
+		memcpy(&lb.current_lease.lease_key, body+0x8,
+		    sizeof(struct smb2_lease_key));
+		lb.current_lease.lease_state = 	SVAL(body, 0x18);
+		lb.new_lease_state =		SVAL(body, 0x1C);
+		lb.break_reason =		SVAL(body, 0x20);
+		lb.access_mask_hint = 		SVAL(body, 0x24);
+		lb.share_mask_hint = 		SVAL(body, 0x28);
 
-	/* possibly sign the message */
-	if (req->session && req->session->signing_active) {
-		status = smb2_sign_message(&req->out, req->session->session_key);
-		if (!NT_STATUS_IS_OK(status)) {
-			req->state = SMB2_REQUEST_ERROR;
-			req->status = status;
-			return;
-		}
-	}
+		TALLOC_FREE(recv_iov);
 
-	if (req->transport->compound.missing > 0) {
-		req->transport->compound.buffer = req->out;
+		transport->lease.handler(transport, &lb,
+		    transport->lease.private_data);
 	} else {
-		status = smb2_transport_raw_send(req->transport,
-						 &req->out);
-		if (!NT_STATUS_IS_OK(status)) {
-			req->state = SMB2_REQUEST_ERROR;
-			req->status = status;
-			return;
-		}
-	}
-	ZERO_STRUCT(req->out);
-
-	req->state = SMB2_REQUEST_RECV;
-	DLIST_ADD(req->transport->pending_recv, req);
-
-	/* add a timeout */
-	if (req->transport->options.request_timeout) {
-		tevent_add_timer(req->transport->socket->event.ctx, req,
-				timeval_current_ofs(req->transport->options.request_timeout, 0), 
-				smb2_timeout_handler, req);
+		DEBUG(5,("Got SMB2 %s break with no handler\n",
+			lease ? "lease" : "oplock"));
 	}
-
-	talloc_set_destructor(req, smb2_request_destructor);
+	TALLOC_FREE(recv_iov);
 }
 
 NTSTATUS smb2_transport_compound_start(struct smb2_transport *transport,
 				       uint32_t num)
 {
+	TALLOC_FREE(transport->compound.reqs);
 	ZERO_STRUCT(transport->compound);
-	transport->compound.missing = num;
+
+	transport->compound.reqs = talloc_zero_array(transport,
+						     struct tevent_req *,
+						     num);
+	if (transport->compound.reqs == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
 	return NT_STATUS_OK;
 }
 
@@ -561,13 +430,7 @@ void smb2_transport_compound_set_related(struct smb2_transport *transport,
 void smb2_transport_credits_ask_num(struct smb2_transport *transport,
 				    uint16_t ask_num)
 {
-	transport->credits.ask_num = ask_num;
-}
-
-void smb2_transport_credits_set_charge(struct smb2_transport *transport,
-				       uint16_t charge)
-{
-	transport->credits.charge = charge;
+	smb2cli_conn_set_max_credits(transport->conn, ask_num);
 }
 
 static void idle_handler(struct tevent_context *ev, 
@@ -576,10 +439,10 @@ static void idle_handler(struct tevent_context *ev,
 	struct smb2_transport *transport = talloc_get_type(private_data,
 							   struct smb2_transport);
 	struct timeval next = timeval_add(&t, 0, transport->idle.period);
-	transport->socket->event.te = tevent_add_timer(transport->socket->event.ctx,
-						      transport,
-						      next,
-						      idle_handler, transport);
+	tevent_add_timer(transport->ev,
+			 transport,
+			 next,
+			 idle_handler, transport);
 	transport->idle.func(transport, transport->idle.private_data);
 }
 
@@ -596,12 +459,8 @@ void smb2_transport_idle_handler(struct smb2_transport *transport,
 	transport->idle.private_data = private_data;
 	transport->idle.period = period;
 
-	if (transport->socket->event.te != NULL) {
-		talloc_free(transport->socket->event.te);
-	}
-
-	transport->socket->event.te = tevent_add_timer(transport->socket->event.ctx,
-						      transport,
-						      timeval_current_ofs(0, period),
-						      idle_handler, transport);
+	tevent_add_timer(transport->ev,
+			 transport,
+			 timeval_current_ofs(0, period),
+			 idle_handler, transport);
 }
diff --git a/source4/libcli/smb2/wscript_build b/source4/libcli/smb2/wscript_build
index 8aac8272e3..d2478a4497 100644
--- a/source4/libcli/smb2/wscript_build
+++ b/source4/libcli/smb2/wscript_build
@@ -1,9 +1,9 @@
 #!/usr/bin/env python
 
 bld.SAMBA_SUBSYSTEM('LIBCLI_SMB2',
-	source='transport.c request.c negprot.c session.c tcon.c create.c close.c connect.c getinfo.c write.c read.c setinfo.c find.c ioctl.c logoff.c tdis.c flush.c lock.c notify.c cancel.c keepalive.c break.c util.c signing.c lease_break.c',
+	source='transport.c request.c session.c tcon.c create.c close.c connect.c getinfo.c write.c read.c setinfo.c find.c ioctl.c logoff.c tdis.c flush.c lock.c notify.c cancel.c keepalive.c break.c util.c signing.c lease_break.c',
 	autoproto='smb2_proto.h',
-	deps='tevent-util',
+	deps='tevent-util libsmb',
 	public_deps='smbclient-raw LIBPACKET gensec tevent'
 	)
 
diff --git a/source4/libcli/smb_composite/smb2.c b/source4/libcli/smb_composite/smb2.c
index 5c93869b5c..0fa51b2857 100644
--- a/source4/libcli/smb_composite/smb2.c
+++ b/source4/libcli/smb_composite/smb2.c
@@ -82,7 +82,7 @@ struct composite_context *smb2_composite_unlink_send(struct smb2_tree *tree,
 	struct smb2_create create_parm;
 	struct smb2_request *req;
 
-	ctx = composite_create(tree, tree->session->transport->socket->event.ctx);
+	ctx = composite_create(tree, tree->session->transport->ev);
 	if (ctx == NULL) return NULL;
 
 	/* check for wildcards - we could support these with a
@@ -161,7 +161,7 @@ struct composite_context *smb2_composite_mkdir_send(struct smb2_tree *tree,
 	struct smb2_create create_parm;
 	struct smb2_request *req;
 
-	ctx = composite_create(tree, tree->session->transport->socket->event.ctx);
+	ctx = composite_create(tree, tree->session->transport->ev);
 	if (ctx == NULL) return NULL;
 
 	ZERO_STRUCT(create_parm);
@@ -232,7 +232,7 @@ struct composite_context *smb2_composite_rmdir_send(struct smb2_tree *tree,
 	struct smb2_create create_parm;
 	struct smb2_request *req;
 
-	ctx = composite_create(tree, tree->session->transport->socket->event.ctx);
+	ctx = composite_create(tree, tree->session->transport->ev);
 	if (ctx == NULL) return NULL;
 
 	ZERO_STRUCT(create_parm);
@@ -416,7 +416,7 @@ NTSTATUS smb2_composite_setpathinfo(struct smb2_tree *tree, union smb_setfileinf
 	NTSTATUS status;
 	bool ok;
 	TALLOC_CTX *frame = talloc_stackframe();
-	struct tevent_context *ev = tree->session->transport->socket->event.ctx;
+	struct tevent_context *ev = tree->session->transport->ev;
 
 	if (frame == NULL) {
 		return NT_STATUS_NO_MEMORY;