2 Unix SMB/CIFS implementation.
4 dcerpc over SMB2 transport
6 Copyright (C) Andrew Tridgell 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "libcli/raw/libcliraw.h"
24 #include "libcli/composite/composite.h"
25 #include "libcli/smb2/smb2.h"
26 #include "libcli/smb2/smb2_calls.h"
27 #include "libcli/raw/ioctl.h"
28 #include "librpc/rpc/dcerpc.h"
29 #include "librpc/rpc/dcerpc_proto.h"
30 #include "librpc/rpc/rpc_common.h"
32 /* transport private information used by SMB2 pipe transport */
34 struct smb2_handle handle;
35 struct smb2_tree *tree;
36 const char *server_name;
42 tell the dcerpc layer that the transport is dead
44 static void pipe_dead(struct dcecli_connection *c, NTSTATUS status)
46 struct smb2_private *smb = (struct smb2_private *)c->transport.private_data;
54 if (NT_STATUS_EQUAL(NT_STATUS_UNSUCCESSFUL, status)) {
55 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
58 if (NT_STATUS_EQUAL(NT_STATUS_OK, status)) {
59 status = NT_STATUS_END_OF_FILE;
62 if (c->transport.recv_data) {
63 c->transport.recv_data(c, NULL, status);
69 this holds the state of an in-flight call
71 struct smb2_read_state {
72 struct dcecli_connection *c;
77 called when a read request has completed
79 static void smb2_read_callback(struct smb2_request *req)
81 struct dcecli_connection *c;
82 struct smb2_private *smb;
83 struct smb2_read_state *state;
88 state = talloc_get_type(req->async.private_data, struct smb2_read_state);
89 smb = talloc_get_type(state->c->transport.private_data, struct smb2_private);
92 status = smb2_read_recv(req, state, &io);
93 if (NT_STATUS_IS_ERR(status)) {
99 if (!data_blob_append(state, &state->data,
100 io.out.data.data, io.out.data.length)) {
102 pipe_dead(c, NT_STATUS_NO_MEMORY);
106 if (state->data.length < 16) {
107 DEBUG(0,("dcerpc_smb2: short packet (length %d) in read callback!\n",
108 (int)state->data.length));
110 pipe_dead(c, NT_STATUS_INFO_LENGTH_MISMATCH);
114 frag_length = dcerpc_get_frag_length(&state->data);
116 if (frag_length <= state->data.length) {
117 DATA_BLOB data = state->data;
118 talloc_steal(c, data.data);
120 c->transport.recv_data(c, &data, NT_STATUS_OK);
124 /* initiate another read request, as we only got part of a fragment */
126 io.in.file.handle = smb->handle;
127 io.in.length = MIN(state->c->srv_max_xmit_frag,
128 frag_length - state->data.length);
129 if (io.in.length < 16) {
133 req = smb2_read_send(smb->tree, &io);
136 pipe_dead(c, NT_STATUS_NO_MEMORY);
140 req->async.fn = smb2_read_callback;
141 req->async.private_data = state;
146 trigger a read request from the server, possibly with some initial
147 data in the read buffer
149 static NTSTATUS send_read_request_continue(struct dcecli_connection *c, DATA_BLOB *blob)
151 struct smb2_private *smb = (struct smb2_private *)c->transport.private_data;
153 struct smb2_read_state *state;
154 struct smb2_request *req;
156 state = talloc(c, struct smb2_read_state);
158 return NT_STATUS_NO_MEMORY;
163 state->data = data_blob(NULL, 0);
166 talloc_steal(state, state->data.data);
170 io.in.file.handle = smb->handle;
172 if (state->data.length >= 16) {
173 uint16_t frag_length = dcerpc_get_frag_length(&state->data);
174 io.in.length = frag_length - state->data.length;
176 io.in.length = 0x2000;
179 req = smb2_read_send(smb->tree, &io);
181 return NT_STATUS_NO_MEMORY;
184 req->async.fn = smb2_read_callback;
185 req->async.private_data = state;
192 trigger a read request from the server
194 static NTSTATUS send_read_request(struct dcecli_connection *c)
196 struct smb2_private *smb = (struct smb2_private *)c->transport.private_data;
199 return NT_STATUS_CONNECTION_DISCONNECTED;
202 return send_read_request_continue(c, NULL);
206 this holds the state of an in-flight trans call
208 struct smb2_trans_state {
209 struct dcecli_connection *c;
213 called when a trans request has completed
215 static void smb2_trans_callback(struct smb2_request *req)
217 struct smb2_trans_state *state = talloc_get_type(req->async.private_data,
218 struct smb2_trans_state);
219 struct dcecli_connection *c = state->c;
221 struct smb2_ioctl io;
223 status = smb2_ioctl_recv(req, state, &io);
224 if (NT_STATUS_IS_ERR(status)) {
225 pipe_dead(c, status);
229 if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
230 DATA_BLOB data = io.out.out;
231 talloc_steal(c, data.data);
233 c->transport.recv_data(c, &data, NT_STATUS_OK);
237 /* there is more to receive - setup a read */
238 send_read_request_continue(c, &io.out.out);
243 send a SMBtrans style request, using a named pipe read_write fsctl
245 static NTSTATUS smb2_send_trans_request(struct dcecli_connection *c, DATA_BLOB *blob)
247 struct smb2_private *smb = talloc_get_type(c->transport.private_data,
248 struct smb2_private);
249 struct smb2_ioctl io;
250 struct smb2_trans_state *state;
251 struct smb2_request *req;
253 state = talloc(smb, struct smb2_trans_state);
255 return NT_STATUS_NO_MEMORY;
261 io.in.file.handle = smb->handle;
262 io.in.function = FSCTL_NAMED_PIPE_READ_WRITE;
263 io.in.max_response_size = 0x2000;
267 req = smb2_ioctl_send(smb->tree, &io);
270 return NT_STATUS_NO_MEMORY;
273 req->async.fn = smb2_trans_callback;
274 req->async.private_data = state;
276 talloc_steal(state, req);
282 called when a write request has completed
284 static void smb2_write_callback(struct smb2_request *req)
286 struct dcecli_connection *c = (struct dcecli_connection *)req->async.private_data;
288 if (!NT_STATUS_IS_OK(req->status)) {
289 DEBUG(0,("dcerpc_smb2: write callback error\n"));
290 pipe_dead(c, req->status);
293 smb2_request_destroy(req);
297 send a packet to the server
299 static NTSTATUS smb2_send_request(struct dcecli_connection *c, DATA_BLOB *blob,
302 struct smb2_private *smb = (struct smb2_private *)c->transport.private_data;
303 struct smb2_write io;
304 struct smb2_request *req;
307 return NT_STATUS_CONNECTION_DISCONNECTED;
311 return smb2_send_trans_request(c, blob);
315 io.in.file.handle = smb->handle;
318 req = smb2_write_send(smb->tree, &io);
320 return NT_STATUS_NO_MEMORY;
323 req->async.fn = smb2_write_callback;
324 req->async.private_data = c;
329 static void free_request(struct smb2_request *req)
335 shutdown SMB pipe connection
337 static NTSTATUS smb2_shutdown_pipe(struct dcecli_connection *c, NTSTATUS status)
339 struct smb2_private *smb = (struct smb2_private *)c->transport.private_data;
340 struct smb2_close io;
341 struct smb2_request *req;
343 /* maybe we're still starting up */
344 if (!smb) return status;
347 io.in.file.handle = smb->handle;
348 req = smb2_close_send(smb->tree, &io);
350 /* we don't care if this fails, so just free it if it succeeds */
351 req->async.fn = free_request;
360 return SMB server name
362 static const char *smb2_peer_name(struct dcecli_connection *c)
364 struct smb2_private *smb = talloc_get_type(c->transport.private_data,
365 struct smb2_private);
366 return smb->server_name;
370 return remote name we make the actual connection (good for kerberos)
372 static const char *smb2_target_hostname(struct dcecli_connection *c)
374 struct smb2_private *smb = talloc_get_type(c->transport.private_data,
375 struct smb2_private);
376 return smb->tree->session->transport->socket->hostname;
380 fetch the user session key
382 static NTSTATUS smb2_session_key(struct dcecli_connection *c, DATA_BLOB *session_key)
384 struct smb2_private *smb = talloc_get_type(c->transport.private_data,
385 struct smb2_private);
386 *session_key = smb->tree->session->session_key;
387 if (session_key->data == NULL) {
388 return NT_STATUS_NO_USER_SESSION_KEY;
393 struct pipe_open_smb2_state {
394 struct dcecli_connection *c;
395 struct composite_context *ctx;
398 static void pipe_open_recv(struct smb2_request *req);
400 struct composite_context *dcerpc_pipe_open_smb2_send(struct dcerpc_pipe *p,
401 struct smb2_tree *tree,
402 const char *pipe_name)
404 struct composite_context *ctx;
405 struct pipe_open_smb2_state *state;
406 struct smb2_create io;
407 struct smb2_request *req;
408 struct dcecli_connection *c = p->conn;
410 ctx = composite_create(c, c->event_ctx);
411 if (ctx == NULL) return NULL;
413 state = talloc(ctx, struct pipe_open_smb2_state);
414 if (composite_nomem(state, ctx)) return ctx;
415 ctx->private_data = state;
421 io.in.desired_access =
422 SEC_STD_READ_CONTROL |
423 SEC_FILE_READ_ATTRIBUTE |
424 SEC_FILE_WRITE_ATTRIBUTE |
425 SEC_STD_SYNCHRONIZE |
429 SEC_FILE_WRITE_DATA |
430 SEC_FILE_APPEND_DATA;
432 NTCREATEX_SHARE_ACCESS_READ |
433 NTCREATEX_SHARE_ACCESS_WRITE;
434 io.in.create_disposition = NTCREATEX_DISP_OPEN;
435 io.in.create_options =
436 NTCREATEX_OPTIONS_NON_DIRECTORY_FILE |
437 NTCREATEX_OPTIONS_NO_RECALL;
438 io.in.impersonation_level = NTCREATEX_IMPERSONATION_IMPERSONATION;
440 if ((strncasecmp(pipe_name, "/pipe/", 6) == 0) ||
441 (strncasecmp(pipe_name, "\\pipe\\", 6) == 0)) {
444 io.in.fname = pipe_name;
446 req = smb2_create_send(tree, &io);
447 composite_continue_smb2(ctx, req, pipe_open_recv, state);
451 static void pipe_open_recv(struct smb2_request *req)
453 struct pipe_open_smb2_state *state =
454 talloc_get_type(req->async.private_data,
455 struct pipe_open_smb2_state);
456 struct composite_context *ctx = state->ctx;
457 struct dcecli_connection *c = state->c;
458 struct smb2_tree *tree = req->tree;
459 struct smb2_private *smb;
460 struct smb2_create io;
462 ctx->status = smb2_create_recv(req, state, &io);
463 if (!composite_is_ok(ctx)) return;
466 fill in the transport methods
468 c->transport.transport = NCACN_NP;
469 c->transport.private_data = NULL;
470 c->transport.shutdown_pipe = smb2_shutdown_pipe;
471 c->transport.peer_name = smb2_peer_name;
472 c->transport.target_hostname = smb2_target_hostname;
474 c->transport.send_request = smb2_send_request;
475 c->transport.send_read = send_read_request;
476 c->transport.recv_data = NULL;
478 /* Over-ride the default session key with the SMB session key */
479 c->security_state.session_key = smb2_session_key;
481 smb = talloc(c, struct smb2_private);
482 if (composite_nomem(smb, ctx)) return;
484 smb->handle = io.out.file.handle;
485 smb->tree = talloc_reference(smb, tree);
486 smb->server_name= strupper_talloc(smb,
487 tree->session->transport->socket->hostname);
488 if (composite_nomem(smb->server_name, ctx)) return;
491 c->transport.private_data = smb;
496 NTSTATUS dcerpc_pipe_open_smb2_recv(struct composite_context *c)
498 NTSTATUS status = composite_wait(c);
503 NTSTATUS dcerpc_pipe_open_smb2(struct dcerpc_pipe *p,
504 struct smb2_tree *tree,
505 const char *pipe_name)
507 struct composite_context *ctx = dcerpc_pipe_open_smb2_send(p, tree, pipe_name);
508 return dcerpc_pipe_open_smb2_recv(ctx);
512 return the SMB2 tree used for a dcerpc over SMB2 pipe
514 struct smb2_tree *dcerpc_smb2_tree(struct dcecli_connection *c)
516 struct smb2_private *smb = talloc_get_type(c->transport.private_data,
517 struct smb2_private);