a44765e9809f5fe2162379e5a4dbcef6838dbd29
[ira/wip.git] / source / libcli / smb_composite / connect.c
1 /* 
2    Unix SMB/CIFS implementation.
3
4    Copyright (C) Andrew Tridgell 2005
5    
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.
10    
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.
15    
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/>.
18 */
19 /*
20   a composite API for making a full SMB connection
21 */
22
23 #include "includes.h"
24 #include "libcli/raw/libcliraw.h"
25 #include "libcli/composite/composite.h"
26 #include "libcli/smb_composite/smb_composite.h"
27 #include "lib/events/events.h"
28 #include "libcli/resolve/resolve.h"
29 #include "auth/credentials/credentials.h"
30 #include "librpc/gen_ndr/ndr_nbt.h"
31 #include "param/param.h"
32
33 /* the stages of this call */
34 enum connect_stage {CONNECT_RESOLVE, 
35                     CONNECT_SOCKET, 
36                     CONNECT_SESSION_REQUEST,
37                     CONNECT_NEGPROT,
38                     CONNECT_SESSION_SETUP,
39                     CONNECT_SESSION_SETUP_ANON,
40                     CONNECT_TCON};
41
42 struct connect_state {
43         enum connect_stage stage;
44         struct smbcli_socket *sock;
45         struct smbcli_transport *transport;
46         struct smbcli_session *session;
47         struct smb_composite_connect *io;
48         union smb_tcon *io_tcon;
49         struct smb_composite_sesssetup *io_setup;
50         struct smbcli_request *req;
51         struct composite_context *creq;
52 };
53
54
55 static void request_handler(struct smbcli_request *);
56 static void composite_handler(struct composite_context *);
57
58 /*
59   setup a negprot send 
60 */
61 static NTSTATUS connect_send_negprot(struct composite_context *c, 
62                                      struct smb_composite_connect *io)
63 {
64         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
65
66         state->req = smb_raw_negotiate_send(state->transport, io->in.options.unicode, io->in.options.max_protocol);
67         NT_STATUS_HAVE_NO_MEMORY(state->req);
68
69         state->req->async.fn = request_handler;
70         state->req->async.private = c;
71         state->stage = CONNECT_NEGPROT;
72         
73         return NT_STATUS_OK;
74 }
75
76
77 /*
78   a tree connect request has completed
79 */
80 static NTSTATUS connect_tcon(struct composite_context *c, 
81                              struct smb_composite_connect *io)
82 {
83         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
84         NTSTATUS status;
85
86         status = smb_raw_tcon_recv(state->req, c, state->io_tcon);
87         NT_STATUS_NOT_OK_RETURN(status);
88
89         io->out.tree->tid = state->io_tcon->tconx.out.tid;
90         if (state->io_tcon->tconx.out.dev_type) {
91                 io->out.tree->device = talloc_strdup(io->out.tree, 
92                                                      state->io_tcon->tconx.out.dev_type);
93         }
94         if (state->io_tcon->tconx.out.fs_type) {
95                 io->out.tree->fs_type = talloc_strdup(io->out.tree, 
96                                                       state->io_tcon->tconx.out.fs_type);
97         }
98
99         /* all done! */
100         c->state = COMPOSITE_STATE_DONE;
101
102         return NT_STATUS_OK;
103 }
104
105
106 /*
107   a session setup request with anonymous fallback has completed
108 */
109 static NTSTATUS connect_session_setup_anon(struct composite_context *c, 
110                                            struct smb_composite_connect *io)
111 {
112         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
113         NTSTATUS status;
114
115         status = smb_composite_sesssetup_recv(state->creq);
116         NT_STATUS_NOT_OK_RETURN(status);
117
118         io->out.anonymous_fallback_done = true;
119         
120         state->session->vuid = state->io_setup->out.vuid;
121         
122         /* setup for a tconx */
123         io->out.tree = smbcli_tree_init(state->session, state, true);
124         NT_STATUS_HAVE_NO_MEMORY(io->out.tree);
125
126         state->io_tcon = talloc(c, union smb_tcon);
127         NT_STATUS_HAVE_NO_MEMORY(state->io_tcon);
128
129         /* connect to a share using a tree connect */
130         state->io_tcon->generic.level = RAW_TCON_TCONX;
131         state->io_tcon->tconx.in.flags = 0;
132         state->io_tcon->tconx.in.password = data_blob(NULL, 0); 
133         
134         state->io_tcon->tconx.in.path = talloc_asprintf(state->io_tcon, 
135                                                  "\\\\%s\\%s", 
136                                                  io->in.called_name, 
137                                                  io->in.service);
138         NT_STATUS_HAVE_NO_MEMORY(state->io_tcon->tconx.in.path);
139         if (!io->in.service_type) {
140                 state->io_tcon->tconx.in.device = "?????";
141         } else {
142                 state->io_tcon->tconx.in.device = io->in.service_type;
143         }
144
145         state->req = smb_raw_tcon_send(io->out.tree, state->io_tcon);
146         NT_STATUS_HAVE_NO_MEMORY(state->req);
147         if (state->req->state == SMBCLI_REQUEST_ERROR) {
148                 return state->req->status;
149         }
150
151         state->req->async.fn = request_handler;
152         state->req->async.private = c;
153         state->stage = CONNECT_TCON;
154
155         return NT_STATUS_OK;
156 }
157
158 /*
159   a session setup request has completed
160 */
161 static NTSTATUS connect_session_setup(struct composite_context *c, 
162                                       struct smb_composite_connect *io)
163 {
164         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
165         NTSTATUS status;
166
167         status = smb_composite_sesssetup_recv(state->creq);
168
169         if (!NT_STATUS_IS_OK(status) &&
170             !cli_credentials_is_anonymous(state->io->in.credentials) &&
171             io->in.fallback_to_anonymous) {
172
173                 state->io_setup->in.credentials = cli_credentials_init(state);
174                 NT_STATUS_HAVE_NO_MEMORY(state->io_setup->in.credentials);
175                 cli_credentials_set_conf(state->io_setup->in.credentials, 
176                                          global_loadparm);
177                 cli_credentials_set_anonymous(state->io_setup->in.credentials);
178
179                 /* If the preceding attempt was with extended security, we
180                  * have been given a uid in the NTLMSSP_CHALLENGE reply. This
181                  * would lead to an invalid uid in the anonymous fallback */
182                 state->session->vuid = 0;
183                 data_blob_free(&state->session->user_session_key);
184                 talloc_free(state->session->gensec);
185                 state->session->gensec = NULL;
186
187                 state->creq = smb_composite_sesssetup_send(state->session,
188                                                            state->io_setup);
189                 NT_STATUS_HAVE_NO_MEMORY(state->creq);
190                 if (state->creq->state == COMPOSITE_STATE_ERROR) {
191                         return state->creq->status;
192                 }
193                 state->creq->async.fn = composite_handler;
194                 state->creq->async.private_data = c;
195                 state->stage = CONNECT_SESSION_SETUP_ANON;
196
197                 return NT_STATUS_OK;
198         }
199
200         NT_STATUS_NOT_OK_RETURN(status);
201         
202         state->session->vuid = state->io_setup->out.vuid;
203         
204         /* setup for a tconx */
205         io->out.tree = smbcli_tree_init(state->session, state, true);
206         NT_STATUS_HAVE_NO_MEMORY(io->out.tree);
207
208         state->io_tcon = talloc(c, union smb_tcon);
209         NT_STATUS_HAVE_NO_MEMORY(state->io_tcon);
210
211         /* connect to a share using a tree connect */
212         state->io_tcon->generic.level = RAW_TCON_TCONX;
213         state->io_tcon->tconx.in.flags = 0;
214         state->io_tcon->tconx.in.password = data_blob(NULL, 0); 
215         
216         state->io_tcon->tconx.in.path = talloc_asprintf(state->io_tcon, 
217                                                  "\\\\%s\\%s", 
218                                                  io->in.called_name, 
219                                                  io->in.service);
220         NT_STATUS_HAVE_NO_MEMORY(state->io_tcon->tconx.in.path);
221         if (!io->in.service_type) {
222                 state->io_tcon->tconx.in.device = "?????";
223         } else {
224                 state->io_tcon->tconx.in.device = io->in.service_type;
225         }
226
227         state->req = smb_raw_tcon_send(io->out.tree, state->io_tcon);
228         NT_STATUS_HAVE_NO_MEMORY(state->req);
229         if (state->req->state == SMBCLI_REQUEST_ERROR) {
230                 return state->req->status;
231         }
232
233         state->req->async.fn = request_handler;
234         state->req->async.private = c;
235         state->stage = CONNECT_TCON;
236
237         return NT_STATUS_OK;
238 }
239
240 /*
241   a negprot request has completed
242 */
243 static NTSTATUS connect_negprot(struct composite_context *c, 
244                                 struct smb_composite_connect *io)
245 {
246         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
247         NTSTATUS status;
248
249         status = smb_raw_negotiate_recv(state->req);
250         NT_STATUS_NOT_OK_RETURN(status);
251
252         /* next step is a session setup */
253         state->session = smbcli_session_init(state->transport, state, true);
254         NT_STATUS_HAVE_NO_MEMORY(state->session);
255
256         state->io_setup = talloc(c, struct smb_composite_sesssetup);
257         NT_STATUS_HAVE_NO_MEMORY(state->io_setup);
258
259         /* prepare a session setup to establish a security context */
260         state->io_setup->in.sesskey      = state->transport->negotiate.sesskey;
261         state->io_setup->in.capabilities = state->transport->negotiate.capabilities;
262         state->io_setup->in.credentials  = io->in.credentials;
263         state->io_setup->in.workgroup    = io->in.workgroup;
264
265         state->creq = smb_composite_sesssetup_send(state->session, state->io_setup);
266         NT_STATUS_HAVE_NO_MEMORY(state->creq);
267         if (state->creq->state == COMPOSITE_STATE_ERROR) {
268                 return state->creq->status;
269         }
270
271         state->creq->async.fn = composite_handler;
272         state->creq->async.private_data = c;
273         state->stage = CONNECT_SESSION_SETUP;
274         
275         return NT_STATUS_OK;
276 }
277
278
279 /*
280   a session request operation has completed
281 */
282 static NTSTATUS connect_session_request(struct composite_context *c, 
283                                         struct smb_composite_connect *io)
284 {
285         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
286         NTSTATUS status;
287
288         status = smbcli_transport_connect_recv(state->req);
289         NT_STATUS_NOT_OK_RETURN(status);
290
291         /* next step is a negprot */
292         return connect_send_negprot(c, io);
293 }
294
295 /*
296   a socket connection operation has completed
297 */
298 static NTSTATUS connect_socket(struct composite_context *c, 
299                                struct smb_composite_connect *io)
300 {
301         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
302         NTSTATUS status;
303         struct nbt_name calling, called;
304
305         status = smbcli_sock_connect_recv(state->creq, state, &state->sock);
306         NT_STATUS_NOT_OK_RETURN(status);
307
308         /* the socket is up - we can initialise the smbcli transport layer */
309         state->transport = smbcli_transport_init(state->sock, state, true, 
310                                                  &io->in.options);
311         NT_STATUS_HAVE_NO_MEMORY(state->transport);
312
313         if (is_ipaddress(state->sock->hostname) &&
314             (state->io->in.called_name != NULL)) {
315                 /* If connecting to an IP address, we might want the real name
316                  * of the host for later kerberos. The called name is a better
317                  * approximation */
318                 state->sock->hostname =
319                         talloc_strdup(state->sock, io->in.called_name);
320                 NT_STATUS_HAVE_NO_MEMORY(state->sock->hostname);
321         }
322
323         make_nbt_name_client(&calling, cli_credentials_get_workstation(io->in.credentials));
324
325         nbt_choose_called_name(state, &called, io->in.called_name, NBT_NAME_SERVER);
326
327         /* we have a connected socket - next step is a session
328            request, if needed. Port 445 doesn't need it, so it goes
329            straight to the negprot */
330         if (state->sock->port == 445) {
331                 status = nbt_name_dup(state->transport, &called, 
332                                       &state->transport->called);
333                 NT_STATUS_NOT_OK_RETURN(status);
334                 return connect_send_negprot(c, io);
335         }
336
337         state->req = smbcli_transport_connect_send(state->transport, &calling, &called);
338         NT_STATUS_HAVE_NO_MEMORY(state->req);
339
340         state->req->async.fn = request_handler;
341         state->req->async.private = c;
342         state->stage = CONNECT_SESSION_REQUEST;
343
344         return NT_STATUS_OK;
345 }
346
347
348 /*
349   called when name resolution is finished
350 */
351 static NTSTATUS connect_resolve(struct composite_context *c, 
352                                 struct smb_composite_connect *io)
353 {
354         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
355         NTSTATUS status;
356         const char *address;
357
358         status = resolve_name_recv(state->creq, state, &address);
359         NT_STATUS_NOT_OK_RETURN(status);
360
361         state->creq = smbcli_sock_connect_send(state, address, 
362                                                io->in.dest_ports,
363                                                io->in.dest_host, 
364                                                NULL, c->event_ctx);
365         NT_STATUS_HAVE_NO_MEMORY(state->creq);
366
367         state->stage = CONNECT_SOCKET;
368         state->creq->async.private_data = c;
369         state->creq->async.fn = composite_handler;
370
371         return NT_STATUS_OK;
372 }
373
374
375 /*
376   handle and dispatch state transitions
377 */
378 static void state_handler(struct composite_context *c)
379 {
380         struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
381
382         switch (state->stage) {
383         case CONNECT_RESOLVE:
384                 c->status = connect_resolve(c, state->io);
385                 break;
386         case CONNECT_SOCKET:
387                 c->status = connect_socket(c, state->io);
388                 break;
389         case CONNECT_SESSION_REQUEST:
390                 c->status = connect_session_request(c, state->io);
391                 break;
392         case CONNECT_NEGPROT:
393                 c->status = connect_negprot(c, state->io);
394                 break;
395         case CONNECT_SESSION_SETUP:
396                 c->status = connect_session_setup(c, state->io);
397                 break;
398         case CONNECT_SESSION_SETUP_ANON:
399                 c->status = connect_session_setup_anon(c, state->io);
400                 break;
401         case CONNECT_TCON:
402                 c->status = connect_tcon(c, state->io);
403                 break;
404         }
405
406         if (!NT_STATUS_IS_OK(c->status)) {
407                 c->state = COMPOSITE_STATE_ERROR;
408         }
409
410         if (c->state >= COMPOSITE_STATE_DONE &&
411             c->async.fn) {
412                 c->async.fn(c);
413         }
414 }
415
416
417 /*
418   handler for completion of a smbcli_request sub-request
419 */
420 static void request_handler(struct smbcli_request *req)
421 {
422         struct composite_context *c = talloc_get_type(req->async.private, 
423                                                      struct composite_context);
424         state_handler(c);
425 }
426
427 /*
428   handler for completion of a smbcli_composite sub-request
429 */
430 static void composite_handler(struct composite_context *creq)
431 {
432         struct composite_context *c = talloc_get_type(creq->async.private_data, 
433                                                      struct composite_context);
434         state_handler(c);
435 }
436
437 /*
438   a function to establish a smbcli_tree from scratch
439 */
440 struct composite_context *smb_composite_connect_send(struct smb_composite_connect *io,
441                                                      TALLOC_CTX *mem_ctx,
442                                                      struct resolve_context *resolve_ctx,
443                                                      struct event_context *event_ctx)
444 {
445         struct composite_context *c;
446         struct connect_state *state;
447         struct nbt_name name;
448
449         c = talloc_zero(mem_ctx, struct composite_context);
450         if (c == NULL) goto failed;
451
452         state = talloc_zero(c, struct connect_state);
453         if (state == NULL) goto failed;
454
455         if (event_ctx == NULL) {
456                 event_ctx = event_context_init(mem_ctx);
457         }
458
459         state->io = io;
460
461         c->state = COMPOSITE_STATE_IN_PROGRESS;
462         c->event_ctx = talloc_reference(c, event_ctx);
463         c->private_data = state;
464
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);
468
469         if (state->creq == NULL) goto failed;
470         state->creq->async.private_data = c;
471         state->creq->async.fn = composite_handler;
472
473         return c;
474 failed:
475         talloc_free(c);
476         return NULL;
477 }
478
479 /*
480   recv half of async composite connect code
481 */
482 NTSTATUS smb_composite_connect_recv(struct composite_context *c, TALLOC_CTX *mem_ctx)
483 {
484         NTSTATUS status;
485
486         status = composite_wait(c);
487
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);
491         }
492
493         talloc_free(c);
494         return status;
495 }
496
497 /*
498   sync version of smb_composite_connect 
499 */
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)
503 {
504         struct composite_context *c = smb_composite_connect_send(io, mem_ctx, resolve_ctx, ev);
505         return smb_composite_connect_recv(c, mem_ctx);
506 }