r11889: added support for dcerpc ncacn_np over SMB2. You use it by giving the

flag 'smb2' in the dcerpc binding string. This gives a pretty good
test to the new SMB2 trans call.
(This used to be commit f99bef585d4c1e52becc06b581bd5aaa62cf9dd7)

1 files changed, 474 insertions, 0 deletions

diff --git a/source4/librpc/rpc/dcerpc_smb2.c b/source4/librpc/rpc/dcerpc_smb2.c
new file mode 100644
index 0000000000..56d568a663
--- /dev/null
+++ b/source4/librpc/rpc/dcerpc_smb2.c
@@ -0,0 +1,474 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   dcerpc over SMB2 transport
+
+   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 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.
+*/
+
+#include "includes.h"
+#include "libcli/raw/libcliraw.h"
+#include "librpc/gen_ndr/ndr_security.h"
+#include "libcli/composite/composite.h"
+#include "libcli/smb2/smb2.h"
+#include "libcli/smb2/smb2_calls.h"
+
+/* transport private information used by SMB2 pipe transport */
+struct smb2_private {
+	struct smb2_handle handle;
+	struct smb2_tree *tree;
+	const char *server_name;
+};
+
+
+/*
+  tell the dcerpc layer that the transport is dead
+*/
+static void pipe_dead(struct dcerpc_connection *c, NTSTATUS status)
+{
+	c->transport.recv_data(c, NULL, status);
+}
+
+
+/* 
+   this holds the state of an in-flight call
+*/
+struct smb2_read_state {
+	struct dcerpc_connection *c;
+	DATA_BLOB data;
+};
+
+/*
+  called when a read request has completed
+*/
+static void smb2_read_callback(struct smb2_request *req)
+{
+	struct smb2_private *smb;
+	struct smb2_read_state *state;
+	struct smb2_read io;
+	uint16_t frag_length;
+	NTSTATUS status;
+
+	state = talloc_get_type(req->async.private, struct smb2_read_state);
+	smb = talloc_get_type(state->c->transport.private, struct smb2_private);
+
+	status = smb2_read_recv(req, state, &io);
+	if (NT_STATUS_IS_ERR(status)) {
+		pipe_dead(state->c, status);
+		talloc_free(state);
+		return;
+	}
+
+	status = data_blob_append(state, &state->data, 
+				  io.out.data.data, io.out.data.length);
+	if (NT_STATUS_IS_ERR(status)) {
+		pipe_dead(state->c, status);
+		talloc_free(state);
+		return;
+	}
+
+	if (state->data.length < 16) {
+		DEBUG(0,("dcerpc_smb2: short packet (length %d) in read callback!\n",
+			 (int)state->data.length));
+		pipe_dead(state->c, NT_STATUS_INFO_LENGTH_MISMATCH);
+		talloc_free(state);
+		return;
+	}
+
+	frag_length = dcerpc_get_frag_length(&state->data);
+
+	if (frag_length <= state->data.length) {
+		DATA_BLOB data = state->data;
+		struct dcerpc_connection *c = state->c;
+		talloc_steal(c, data.data);
+		talloc_free(state);
+		c->transport.recv_data(c, &data, NT_STATUS_OK);
+		return;
+	}
+
+	/* initiate another read request, as we only got part of a fragment */
+	ZERO_STRUCT(io);
+	io.in.length = MIN(state->c->srv_max_xmit_frag, 
+			   frag_length - state->data.length);
+	io.in.handle = smb->handle;
+	
+	req = smb2_read_send(smb->tree, &io);
+	if (req == NULL) {
+		pipe_dead(state->c, NT_STATUS_NO_MEMORY);
+		talloc_free(state);
+		return;
+	}
+
+	req->async.fn = smb2_read_callback;
+	req->async.private = state;
+}
+
+
+/*
+  trigger a read request from the server, possibly with some initial
+  data in the read buffer
+*/
+static NTSTATUS send_read_request_continue(struct dcerpc_connection *c, DATA_BLOB *blob)
+{
+	struct smb2_private *smb = c->transport.private;
+	struct smb2_read io;
+	struct smb2_read_state *state;
+	struct smb2_request *req;
+
+	state = talloc(smb, struct smb2_read_state);
+	if (state == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	state->c = c;
+	if (blob == NULL) {
+		state->data = data_blob(NULL, 0);
+	} else {
+		state->data = *blob;
+		talloc_steal(state, state->data.data);
+	}
+
+	ZERO_STRUCT(io);
+	io.in.handle = smb->handle;
+
+	if (state->data.length >= 16) {
+		uint16_t frag_length = dcerpc_get_frag_length(&state->data);
+		io.in.length = frag_length - state->data.length;
+	} else {
+		io.in.length = 0x2000;
+	}
+
+	req = smb2_read_send(smb->tree, &io);
+	if (req == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	req->async.fn = smb2_read_callback;
+	req->async.private = state;
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+  trigger a read request from the server
+*/
+static NTSTATUS send_read_request(struct dcerpc_connection *c)
+{
+	return send_read_request_continue(c, NULL);
+}
+
+/* 
+   this holds the state of an in-flight trans call
+*/
+struct smb2_trans_state {
+	struct dcerpc_connection *c;
+};
+
+/*
+  called when a trans request has completed
+*/
+static void smb2_trans_callback(struct smb2_request *req)
+{
+	struct smb2_trans_state *state = talloc_get_type(req->async.private,
+							struct smb2_trans_state);
+	struct dcerpc_connection *c = state->c;
+	NTSTATUS status;
+	struct smb2_trans io;
+
+	status = smb2_trans_recv(req, state, &io);
+	if (NT_STATUS_IS_ERR(status)) {
+		pipe_dead(c, status);
+		return;
+	}
+
+	if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
+		DATA_BLOB data = io.out.out;
+		talloc_steal(c, data.data);
+		talloc_free(state);
+		c->transport.recv_data(c, &data, NT_STATUS_OK);
+		return;
+	}
+
+	/* there is more to receive - setup a read */
+	send_read_request_continue(c, &io.out.out);
+	talloc_free(state);
+}
+
+/*
+  send a SMBtrans style request
+*/
+static NTSTATUS smb2_send_trans_request(struct dcerpc_connection *c, DATA_BLOB *blob)
+{
+        struct smb2_private *smb = talloc_get_type(c->transport.private,
+						   struct smb2_private);
+        struct smb2_trans io;
+	struct smb2_trans_state *state;
+	struct smb2_request *req;
+
+	state = talloc(smb, struct smb2_trans_state);
+	if (state == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	state->c = c;
+	
+	ZERO_STRUCT(io);
+	io.in.unknown1 = 0x0011c017;
+	io.in.handle = smb->handle;
+	io.in.max_response_size = 0x10000;
+	io.in.flags = 1;
+	io.in.out = *blob;
+
+        req = smb2_trans_send(smb->tree, &io);
+	if (req == NULL) {
+		talloc_free(state);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	req->async.fn = smb2_trans_callback;
+	req->async.private = state;
+
+	talloc_steal(state, req);
+
+        return NT_STATUS_OK;
+}
+
+/*
+  called when a write request has completed
+*/
+static void smb2_write_callback(struct smb2_request *req)
+{
+	struct dcerpc_connection *c = req->async.private;
+
+	if (!NT_STATUS_IS_OK(req->status)) {
+		DEBUG(0,("dcerpc_smb2: write callback error\n"));
+		pipe_dead(c, req->status);
+	}
+
+	smb2_request_destroy(req);
+}
+
+/* 
+   send a packet to the server
+*/
+static NTSTATUS smb2_send_request(struct dcerpc_connection *c, DATA_BLOB *blob, 
+				  BOOL trigger_read)
+{
+	struct smb2_private *smb = c->transport.private;
+	struct smb2_write io;
+	struct smb2_request *req;
+
+	if (trigger_read) {
+		return smb2_send_trans_request(c, blob);
+	}
+
+	ZERO_STRUCT(io);
+	io.in.handle = smb->handle;
+	io.in.data = *blob;
+
+	req = smb2_write_send(smb->tree, &io);
+	if (req == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	req->async.fn = smb2_write_callback;
+	req->async.private = c;
+
+	return NT_STATUS_OK;
+}
+
+/* 
+   shutdown SMB pipe connection
+*/
+static NTSTATUS smb2_shutdown_pipe(struct dcerpc_connection *c)
+{
+	struct smb2_private *smb = c->transport.private;
+	struct smb2_close io;
+	struct smb2_request *req;
+
+	/* maybe we're still starting up */
+	if (!smb) return NT_STATUS_OK;
+
+	ZERO_STRUCT(io);
+	io.in.handle = smb->handle;
+	req = smb2_close_send(smb->tree, &io);
+	if (req != NULL) {
+		/* we don't care if this fails, so just free it if it succeeds */
+		req->async.fn = (void (*)(struct smb2_request *))talloc_free;
+	}
+
+	talloc_free(smb);
+
+	return NT_STATUS_OK;
+}
+
+/*
+  return SMB server name
+*/
+static const char *smb2_peer_name(struct dcerpc_connection *c)
+{
+	struct smb2_private *smb = talloc_get_type(c->transport.private,
+						   struct smb2_private);
+	return smb->server_name;
+}
+
+/*
+  fetch the user session key 
+*/
+static NTSTATUS smb2_session_key(struct dcerpc_connection *c, DATA_BLOB *session_key)
+{
+	struct smb2_private *smb = talloc_get_type(c->transport.private,
+						   struct smb2_private);
+	*session_key = smb->tree->session->session_key;
+	if (session_key->data == NULL) {
+		return NT_STATUS_NO_USER_SESSION_KEY;
+	}
+	return NT_STATUS_OK;
+}
+
+struct pipe_open_smb2_state {
+	struct dcerpc_connection *c;
+	struct composite_context *ctx;
+};
+
+static void pipe_open_recv(struct smb2_request *req);
+
+struct composite_context *dcerpc_pipe_open_smb2_send(struct dcerpc_connection *c, 
+						     struct smb2_tree *tree,
+						     const char *pipe_name)
+{
+	struct composite_context *ctx;
+	struct pipe_open_smb2_state *state;
+	struct smb2_create io;
+	struct smb2_request *req;
+
+	ctx = talloc_zero(NULL, struct composite_context);
+	if (ctx == NULL) goto failed;
+	ctx->state = COMPOSITE_STATE_IN_PROGRESS;
+	ctx->event_ctx = talloc_reference(c, c->event_ctx);
+
+	state = talloc(ctx, struct pipe_open_smb2_state);
+	if (state == NULL) goto failed;
+
+	state->c = c;
+	state->ctx = ctx;
+
+	ZERO_STRUCT(io);
+	io.in.access_mask = 
+		SEC_STD_READ_CONTROL |
+		SEC_FILE_READ_ATTRIBUTE |
+		SEC_FILE_WRITE_ATTRIBUTE |
+		SEC_STD_SYNCHRONIZE |
+		SEC_FILE_READ_EA |
+		SEC_FILE_WRITE_EA |
+		SEC_FILE_READ_DATA |
+		SEC_FILE_WRITE_DATA |
+		SEC_FILE_APPEND_DATA;
+	io.in.share_access = 
+		NTCREATEX_SHARE_ACCESS_READ |
+		NTCREATEX_SHARE_ACCESS_WRITE;
+	io.in.open_disposition = NTCREATEX_DISP_OPEN;
+	io.in.create_options   = 0x400040;
+	io.in.impersonation    = NTCREATEX_IMPERSONATION_IMPERSONATION;
+
+	if ((strncasecmp(pipe_name, "/pipe/", 6) == 0) || 
+	    (strncasecmp(pipe_name, "\\pipe\\", 6) == 0)) {
+		pipe_name += 6;
+	}
+	io.in.fname = pipe_name;
+
+	req = smb2_create_send(tree, &io);
+	if (req == NULL) goto failed;
+
+	req->async.fn = pipe_open_recv;
+	req->async.private = state;
+
+	return ctx;
+
+ failed:
+	talloc_free(ctx);
+	return NULL;
+}
+
+static void pipe_open_recv(struct smb2_request *req)
+{
+	struct pipe_open_smb2_state *state =
+		talloc_get_type(req->async.private,
+				struct pipe_open_smb2_state);
+	struct composite_context *ctx = state->ctx;
+	struct dcerpc_connection *c = state->c;
+	struct smb2_tree *tree = req->tree;
+	struct smb2_private *smb;
+	struct smb2_create io;
+
+	ctx->status = smb2_create_recv(req, state, &io);
+	if (!composite_is_ok(ctx)) return;
+
+	/*
+	  fill in the transport methods
+	*/
+	c->transport.transport = NCACN_NP;
+	c->transport.private = NULL;
+	c->transport.shutdown_pipe = smb2_shutdown_pipe;
+	c->transport.peer_name = smb2_peer_name;
+
+	c->transport.send_request = smb2_send_request;
+	c->transport.send_read = send_read_request;
+	c->transport.recv_data = NULL;
+	
+	/* Over-ride the default session key with the SMB session key */
+	c->security_state.session_key = smb2_session_key;
+
+	smb = talloc(c, struct smb2_private);
+	if (composite_nomem(smb, ctx)) return;
+
+	smb->handle	= io.out.handle;
+	smb->tree	= talloc_reference(smb, tree);
+	smb->server_name= strupper_talloc(smb, 
+					  tree->session->transport->socket->hostname);
+	if (composite_nomem(smb->server_name, ctx)) return;
+
+	c->transport.private = smb;
+
+	composite_done(ctx);
+}
+
+NTSTATUS dcerpc_pipe_open_smb2_recv(struct composite_context *c)
+{
+	NTSTATUS status = composite_wait(c);
+	talloc_free(c);
+	return status;
+}
+
+NTSTATUS dcerpc_pipe_open_smb2(struct dcerpc_connection *c,
+			       struct smb2_tree *tree,
+			       const char *pipe_name)
+{
+	struct composite_context *ctx =	dcerpc_pipe_open_smb2_send(c, tree, pipe_name);
+	return dcerpc_pipe_open_smb2_recv(ctx);
+}
+
+/*
+  return the SMB2 tree used for a dcerpc over SMB2 pipe
+*/
+struct smb2_tree *dcerpc_smb2_tree(struct dcerpc_connection *c)
+{
+	struct smb2_private *smb = talloc_get_type(c->transport.private,
+						   struct smb2_private);
+	return smb->tree;
+}