2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2005
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 a composite API for making a full SMB connection
24 #include "libcli/raw/libcliraw.h"
25 #include "libcli/raw/raw_proto.h"
26 #include "libcli/composite/composite.h"
27 #include "libcli/smb_composite/smb_composite.h"
28 #include "lib/events/events.h"
29 #include "libcli/resolve/resolve.h"
30 #include "auth/credentials/credentials.h"
31 #include "librpc/gen_ndr/ndr_nbt.h"
32 #include "param/param.h"
34 /* the stages of this call */
35 enum connect_stage {CONNECT_RESOLVE,
37 CONNECT_SESSION_REQUEST,
39 CONNECT_SESSION_SETUP,
40 CONNECT_SESSION_SETUP_ANON,
43 struct connect_state {
44 enum connect_stage stage;
45 struct smbcli_socket *sock;
46 struct smbcli_transport *transport;
47 struct smbcli_session *session;
48 struct smb_composite_connect *io;
49 union smb_tcon *io_tcon;
50 struct smb_composite_sesssetup *io_setup;
51 struct smbcli_request *req;
52 struct composite_context *creq;
56 static void request_handler(struct smbcli_request *);
57 static void composite_handler(struct composite_context *);
62 static NTSTATUS connect_send_negprot(struct composite_context *c,
63 struct smb_composite_connect *io)
65 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
67 state->req = smb_raw_negotiate_send(state->transport, io->in.options.unicode, io->in.options.max_protocol);
68 NT_STATUS_HAVE_NO_MEMORY(state->req);
70 state->req->async.fn = request_handler;
71 state->req->async.private = c;
72 state->stage = CONNECT_NEGPROT;
79 a tree connect request has completed
81 static NTSTATUS connect_tcon(struct composite_context *c,
82 struct smb_composite_connect *io)
84 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
87 status = smb_raw_tcon_recv(state->req, c, state->io_tcon);
88 NT_STATUS_NOT_OK_RETURN(status);
90 io->out.tree->tid = state->io_tcon->tconx.out.tid;
91 if (state->io_tcon->tconx.out.dev_type) {
92 io->out.tree->device = talloc_strdup(io->out.tree,
93 state->io_tcon->tconx.out.dev_type);
95 if (state->io_tcon->tconx.out.fs_type) {
96 io->out.tree->fs_type = talloc_strdup(io->out.tree,
97 state->io_tcon->tconx.out.fs_type);
101 c->state = COMPOSITE_STATE_DONE;
108 a session setup request with anonymous fallback has completed
110 static NTSTATUS connect_session_setup_anon(struct composite_context *c,
111 struct smb_composite_connect *io)
113 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
116 status = smb_composite_sesssetup_recv(state->creq);
117 NT_STATUS_NOT_OK_RETURN(status);
119 io->out.anonymous_fallback_done = true;
121 state->session->vuid = state->io_setup->out.vuid;
123 /* setup for a tconx */
124 io->out.tree = smbcli_tree_init(state->session, state, true);
125 NT_STATUS_HAVE_NO_MEMORY(io->out.tree);
127 state->io_tcon = talloc(c, union smb_tcon);
128 NT_STATUS_HAVE_NO_MEMORY(state->io_tcon);
130 /* connect to a share using a tree connect */
131 state->io_tcon->generic.level = RAW_TCON_TCONX;
132 state->io_tcon->tconx.in.flags = 0;
133 state->io_tcon->tconx.in.password = data_blob(NULL, 0);
135 state->io_tcon->tconx.in.path = talloc_asprintf(state->io_tcon,
139 NT_STATUS_HAVE_NO_MEMORY(state->io_tcon->tconx.in.path);
140 if (!io->in.service_type) {
141 state->io_tcon->tconx.in.device = "?????";
143 state->io_tcon->tconx.in.device = io->in.service_type;
146 state->req = smb_raw_tcon_send(io->out.tree, state->io_tcon);
147 NT_STATUS_HAVE_NO_MEMORY(state->req);
148 if (state->req->state == SMBCLI_REQUEST_ERROR) {
149 return state->req->status;
152 state->req->async.fn = request_handler;
153 state->req->async.private = c;
154 state->stage = CONNECT_TCON;
160 a session setup request has completed
162 static NTSTATUS connect_session_setup(struct composite_context *c,
163 struct smb_composite_connect *io)
165 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
168 status = smb_composite_sesssetup_recv(state->creq);
170 if (!NT_STATUS_IS_OK(status) &&
171 !cli_credentials_is_anonymous(state->io->in.credentials) &&
172 io->in.fallback_to_anonymous) {
174 state->io_setup->in.credentials = cli_credentials_init(state);
175 NT_STATUS_HAVE_NO_MEMORY(state->io_setup->in.credentials);
176 cli_credentials_set_workstation(state->io_setup->in.credentials,
177 cli_credentials_get_workstation(state->io->in.credentials),
179 cli_credentials_set_anonymous(state->io_setup->in.credentials);
181 /* If the preceding attempt was with extended security, we
182 * have been given a uid in the NTLMSSP_CHALLENGE reply. This
183 * would lead to an invalid uid in the anonymous fallback */
184 state->session->vuid = 0;
185 data_blob_free(&state->session->user_session_key);
186 talloc_free(state->session->gensec);
187 state->session->gensec = NULL;
189 state->creq = smb_composite_sesssetup_send(state->session,
191 NT_STATUS_HAVE_NO_MEMORY(state->creq);
192 if (state->creq->state == COMPOSITE_STATE_ERROR) {
193 return state->creq->status;
195 state->creq->async.fn = composite_handler;
196 state->creq->async.private_data = c;
197 state->stage = CONNECT_SESSION_SETUP_ANON;
202 NT_STATUS_NOT_OK_RETURN(status);
204 state->session->vuid = state->io_setup->out.vuid;
206 /* setup for a tconx */
207 io->out.tree = smbcli_tree_init(state->session, state, true);
208 NT_STATUS_HAVE_NO_MEMORY(io->out.tree);
210 state->io_tcon = talloc(c, union smb_tcon);
211 NT_STATUS_HAVE_NO_MEMORY(state->io_tcon);
213 /* connect to a share using a tree connect */
214 state->io_tcon->generic.level = RAW_TCON_TCONX;
215 state->io_tcon->tconx.in.flags = 0;
216 state->io_tcon->tconx.in.password = data_blob(NULL, 0);
218 state->io_tcon->tconx.in.path = talloc_asprintf(state->io_tcon,
222 NT_STATUS_HAVE_NO_MEMORY(state->io_tcon->tconx.in.path);
223 if (!io->in.service_type) {
224 state->io_tcon->tconx.in.device = "?????";
226 state->io_tcon->tconx.in.device = io->in.service_type;
229 state->req = smb_raw_tcon_send(io->out.tree, state->io_tcon);
230 NT_STATUS_HAVE_NO_MEMORY(state->req);
231 if (state->req->state == SMBCLI_REQUEST_ERROR) {
232 return state->req->status;
235 state->req->async.fn = request_handler;
236 state->req->async.private = c;
237 state->stage = CONNECT_TCON;
243 a negprot request has completed
245 static NTSTATUS connect_negprot(struct composite_context *c,
246 struct smb_composite_connect *io)
248 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
251 status = smb_raw_negotiate_recv(state->req);
252 NT_STATUS_NOT_OK_RETURN(status);
254 /* next step is a session setup */
255 state->session = smbcli_session_init(state->transport, state, true);
256 NT_STATUS_HAVE_NO_MEMORY(state->session);
258 state->io_setup = talloc(c, struct smb_composite_sesssetup);
259 NT_STATUS_HAVE_NO_MEMORY(state->io_setup);
261 /* prepare a session setup to establish a security context */
262 state->io_setup->in.sesskey = state->transport->negotiate.sesskey;
263 state->io_setup->in.capabilities = state->transport->negotiate.capabilities;
264 state->io_setup->in.credentials = io->in.credentials;
265 state->io_setup->in.workgroup = io->in.workgroup;
267 state->creq = smb_composite_sesssetup_send(state->session, state->io_setup);
268 NT_STATUS_HAVE_NO_MEMORY(state->creq);
269 if (state->creq->state == COMPOSITE_STATE_ERROR) {
270 return state->creq->status;
273 state->creq->async.fn = composite_handler;
274 state->creq->async.private_data = c;
275 state->stage = CONNECT_SESSION_SETUP;
282 a session request operation has completed
284 static NTSTATUS connect_session_request(struct composite_context *c,
285 struct smb_composite_connect *io)
287 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
290 status = smbcli_transport_connect_recv(state->req);
291 NT_STATUS_NOT_OK_RETURN(status);
293 /* next step is a negprot */
294 return connect_send_negprot(c, io);
298 a socket connection operation has completed
300 static NTSTATUS connect_socket(struct composite_context *c,
301 struct smb_composite_connect *io)
303 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
305 struct nbt_name calling, called;
307 status = smbcli_sock_connect_recv(state->creq, state, &state->sock);
308 NT_STATUS_NOT_OK_RETURN(status);
310 /* the socket is up - we can initialise the smbcli transport layer */
311 state->transport = smbcli_transport_init(state->sock, state, true,
313 NT_STATUS_HAVE_NO_MEMORY(state->transport);
315 if (is_ipaddress(state->sock->hostname) &&
316 (state->io->in.called_name != NULL)) {
317 /* If connecting to an IP address, we might want the real name
318 * of the host for later kerberos. The called name is a better
320 state->sock->hostname =
321 talloc_strdup(state->sock, io->in.called_name);
322 NT_STATUS_HAVE_NO_MEMORY(state->sock->hostname);
325 make_nbt_name_client(&calling, cli_credentials_get_workstation(io->in.credentials));
327 nbt_choose_called_name(state, &called, io->in.called_name, NBT_NAME_SERVER);
329 /* we have a connected socket - next step is a session
330 request, if needed. Port 445 doesn't need it, so it goes
331 straight to the negprot */
332 if (state->sock->port == 445) {
333 status = nbt_name_dup(state->transport, &called,
334 &state->transport->called);
335 NT_STATUS_NOT_OK_RETURN(status);
336 return connect_send_negprot(c, io);
339 state->req = smbcli_transport_connect_send(state->transport, &calling, &called);
340 NT_STATUS_HAVE_NO_MEMORY(state->req);
342 state->req->async.fn = request_handler;
343 state->req->async.private = c;
344 state->stage = CONNECT_SESSION_REQUEST;
351 called when name resolution is finished
353 static NTSTATUS connect_resolve(struct composite_context *c,
354 struct smb_composite_connect *io)
356 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
360 status = resolve_name_recv(state->creq, state, &address);
361 NT_STATUS_NOT_OK_RETURN(status);
363 state->creq = smbcli_sock_connect_send(state, address,
367 NT_STATUS_HAVE_NO_MEMORY(state->creq);
369 state->stage = CONNECT_SOCKET;
370 state->creq->async.private_data = c;
371 state->creq->async.fn = composite_handler;
378 handle and dispatch state transitions
380 static void state_handler(struct composite_context *c)
382 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
384 switch (state->stage) {
385 case CONNECT_RESOLVE:
386 c->status = connect_resolve(c, state->io);
389 c->status = connect_socket(c, state->io);
391 case CONNECT_SESSION_REQUEST:
392 c->status = connect_session_request(c, state->io);
394 case CONNECT_NEGPROT:
395 c->status = connect_negprot(c, state->io);
397 case CONNECT_SESSION_SETUP:
398 c->status = connect_session_setup(c, state->io);
400 case CONNECT_SESSION_SETUP_ANON:
401 c->status = connect_session_setup_anon(c, state->io);
404 c->status = connect_tcon(c, state->io);
408 if (!NT_STATUS_IS_OK(c->status)) {
409 c->state = COMPOSITE_STATE_ERROR;
412 if (c->state >= COMPOSITE_STATE_DONE &&
420 handler for completion of a smbcli_request sub-request
422 static void request_handler(struct smbcli_request *req)
424 struct composite_context *c = talloc_get_type(req->async.private,
425 struct composite_context);
430 handler for completion of a smbcli_composite sub-request
432 static void composite_handler(struct composite_context *creq)
434 struct composite_context *c = talloc_get_type(creq->async.private_data,
435 struct composite_context);
440 a function to establish a smbcli_tree from scratch
442 struct composite_context *smb_composite_connect_send(struct smb_composite_connect *io,
444 struct resolve_context *resolve_ctx,
445 struct event_context *event_ctx)
447 struct composite_context *c;
448 struct connect_state *state;
449 struct nbt_name name;
451 c = talloc_zero(mem_ctx, struct composite_context);
452 if (c == NULL) goto failed;
454 c->event_ctx = talloc_reference(c, event_ctx);
455 if (c->event_ctx == NULL) goto failed;
457 state = talloc_zero(c, struct connect_state);
458 if (state == NULL) goto failed;
462 c->state = COMPOSITE_STATE_IN_PROGRESS;
463 c->private_data = state;
465 state->stage = CONNECT_RESOLVE;
466 make_nbt_name_server(&name, io->in.dest_host);
467 state->creq = resolve_name_send(resolve_ctx, &name, c->event_ctx);
469 if (state->creq == NULL) goto failed;
470 state->creq->async.private_data = c;
471 state->creq->async.fn = composite_handler;
480 recv half of async composite connect code
482 NTSTATUS smb_composite_connect_recv(struct composite_context *c, TALLOC_CTX *mem_ctx)
486 status = composite_wait(c);
488 if (NT_STATUS_IS_OK(status)) {
489 struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
490 talloc_steal(mem_ctx, state->io->out.tree);
498 sync version of smb_composite_connect
500 NTSTATUS smb_composite_connect(struct smb_composite_connect *io, TALLOC_CTX *mem_ctx,
501 struct resolve_context *resolve_ctx,
502 struct event_context *ev)
504 struct composite_context *c = smb_composite_connect_send(io, mem_ctx, resolve_ctx, ev);
505 return smb_composite_connect_recv(c, mem_ctx);