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source: branches/samba-3.2.x/source/libsmb/clidfs.c@ 232

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Last change on this file since 232 was 232, checked in by Herwig Bauernfeind, 16 years ago
Update 3.2 branch to 3.2.8
File size: 27.4 KB

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1	/*
2	Unix SMB/CIFS implementation.
3	client connect/disconnect routines
4	Copyright (C) Andrew Tridgell 1994-1998
5	Copyright (C) Gerald (Jerry) Carter 2004
6	Copyright (C) Jeremy Allison 2007
7
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.
12
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.
17
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/>.
20	*/
21
22	#include "includes.h"
23
24	/********************************************************************
25	Important point.
26
27	DFS paths are always of the form \server\share\<pathname> (the \ characters
28	are not C escaped here).
29
30	- but if we're using POSIX paths then <pathname> may contain
31	'/' separators, not '\\' separators. So cope with '\\' or '/'
32	as a separator when looking at the pathname part.... JRA.
33	********************************************************************/
34
35	struct client_connection {
36	struct client_connection prev, next;
37	struct cli_state *cli;
38	char *mount;
39	};
40
41	/* global state....globals reek! */
42	int max_protocol = PROTOCOL_NT1;
43
44	static struct cm_cred_struct {
45	char *username;
46	char *password;
47	bool got_pass;
48	bool use_kerberos;
49	bool fallback_after_kerberos;
50	int signing_state;
51	} cm_creds;
52
53	static void cm_set_password(const char *newpass);
54
55	static int port;
56	static int name_type = 0x20;
57	static bool have_ip;
58	static struct sockaddr_storage dest_ss;
59
60	static struct client_connection *connections;
61
62	static bool cli_check_msdfs_proxy(TALLOC_CTX *ctx,
63	struct cli_state *cli,
64	const char *sharename,
65	char **pp_newserver,
66	char **pp_newshare,
67	bool force_encrypt,
68	const char *username,
69	const char *password,
70	const char *domain);
71
72	/********************************************************************
73	Ensure a connection is encrypted.
74	********************************************************************/
75
76	NTSTATUS cli_cm_force_encryption(struct cli_state *c,
77	const char *username,
78	const char *password,
79	const char *domain,
80	const char *sharename)
81	{
82	NTSTATUS status = cli_force_encryption(c,
83	username,
84	password,
85	domain);
86
87	if (NT_STATUS_EQUAL(status,NT_STATUS_NOT_SUPPORTED)) {
88	d_printf("Encryption required and "
89	"server that doesn't support "
90	"UNIX extensions - failing connect\n");
91	} else if (NT_STATUS_EQUAL(status,NT_STATUS_UNKNOWN_REVISION)) {
92	d_printf("Encryption required and "
93	"can't get UNIX CIFS extensions "
94	"version from server.\n");
95	} else if (NT_STATUS_EQUAL(status,NT_STATUS_UNSUPPORTED_COMPRESSION)) {
96	d_printf("Encryption required and "
97	"share %s doesn't support "
98	"encryption.\n", sharename);
99	} else if (!NT_STATUS_IS_OK(status)) {
100	d_printf("Encryption required and "
101	"setup failed with error %s.\n",
102	nt_errstr(status));
103	}
104
105	return status;
106	}
107
108	/********************************************************************
109	Return a connection to a server.
110	********************************************************************/
111
112	static struct cli_state do_connect(TALLOC_CTX ctx,
113	const char *server,
114	const char *share,
115	bool show_sessetup,
116	bool force_encrypt)
117	{
118	struct cli_state *c = NULL;
119	struct nmb_name called, calling;
120	const char *server_n;
121	struct sockaddr_storage ss;
122	char *servicename;
123	char *sharename;
124	char newserver, newshare;
125	const char *username;
126	const char *password;
127	NTSTATUS status;
128
129	/* make a copy so we don't modify the global string 'service' */
130	servicename = talloc_strdup(ctx,share);
131	if (!servicename) {
132	return NULL;
133	}
134	sharename = servicename;
135	if (*sharename == '\\') {
136	server = sharename+2;
137	sharename = strchr_m(server,'\\');
138	if (!sharename) {
139	return NULL;
140	}
141	*sharename = 0;
142	sharename++;
143	}
144
145	server_n = server;
146
147	zero_sockaddr(&ss);
148
149	make_nmb_name(&calling, global_myname(), 0x0);
150	make_nmb_name(&called , server, name_type);
151
152	again:
153	zero_sockaddr(&ss);
154	if (have_ip)
155	ss = dest_ss;
156
157	/* have to open a new connection */
158	if (!(c=cli_initialise()) \|\| (cli_set_port(c, port) != port)) {
159	d_printf("Connection to %s failed\n", server_n);
160	if (c) {
161	cli_shutdown(c);
162	}
163	return NULL;
164	}
165	status = cli_connect(c, server_n, &ss);
166	if (!NT_STATUS_IS_OK(status)) {
167	d_printf("Connection to %s failed (Error %s)\n",
168	server_n,
169	nt_errstr(status));
170	cli_shutdown(c);
171	return NULL;
172	}
173
174	c->protocol = max_protocol;
175	c->use_kerberos = cm_creds.use_kerberos;
176	c->fallback_after_kerberos = cm_creds.fallback_after_kerberos;
177	cli_setup_signing_state(c, cm_creds.signing_state);
178
179	if (!cli_session_request(c, &calling, &called)) {
180	char *p;
181	d_printf("session request to %s failed (%s)\n",
182	called.name, cli_errstr(c));
183	cli_shutdown(c);
184	c = NULL;
185	if ((p=strchr_m(called.name, '.'))) {
186	*p = 0;
187	goto again;
188	}
189	if (strcmp(called.name, "*SMBSERVER")) {
190	make_nmb_name(&called , "*SMBSERVER", 0x20);
191	goto again;
192	}
193	return NULL;
194	}
195
196	DEBUG(4,(" session request ok\n"));
197
198	if (!cli_negprot(c)) {
199	d_printf("protocol negotiation failed\n");
200	cli_shutdown(c);
201	return NULL;
202	}
203
204	if (!cm_creds.got_pass && !cm_creds.use_kerberos) {
205	char *label = NULL;
206	char *pass;
207	label = talloc_asprintf(ctx, "Enter %s's password: ",
208	cm_creds.username);
209	pass = getpass(label);
210	if (pass) {
211	cm_set_password(pass);
212	}
213	TALLOC_FREE(label);
214	}
215
216	username = cm_creds.username ? cm_creds.username : "";
217	password = cm_creds.password ? cm_creds.password : "";
218
219	if (!NT_STATUS_IS_OK(cli_session_setup(c, username,
220	password, strlen(password),
221	password, strlen(password),
222	lp_workgroup()))) {
223	/* If a password was not supplied then
224	* try again with a null username. */
225	if (password[0] \|\| !username[0] \|\| cm_creds.use_kerberos \|\|
226	!NT_STATUS_IS_OK(cli_session_setup(c, "",
227	"", 0,
228	"", 0,
229	lp_workgroup()))) {
230	d_printf("session setup failed: %s\n", cli_errstr(c));
231	if (NT_STATUS_V(cli_nt_error(c)) ==
232	NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
233	d_printf("did you forget to run kinit?\n");
234	cli_shutdown(c);
235	return NULL;
236	}
237	d_printf("Anonymous login successful\n");
238	}
239
240	if ( show_sessetup ) {
241	if (*c->server_domain) {
242	DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
243	c->server_domain,c->server_os,c->server_type));
244	} else if (c->server_os \|\| c->server_type) {
245	DEBUG(0,("OS=[%s] Server=[%s]\n",
246	c->server_os,c->server_type));
247	}
248	}
249	DEBUG(4,(" session setup ok\n"));
250
251	/* here's the fun part....to support 'msdfs proxy' shares
252	(on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
253	here before trying to connect to the original share.
254	check_dfs_proxy() will fail if it is a normal share. */
255
256	if ((c->capabilities & CAP_DFS) &&
257	cli_check_msdfs_proxy(ctx, c, sharename,
258	&newserver, &newshare,
259	force_encrypt,
260	username,
261	password,
262	lp_workgroup())) {
263	cli_shutdown(c);
264	return do_connect(ctx, newserver,
265	newshare, false, force_encrypt);
266	}
267
268	/* must be a normal share */
269
270	if (!cli_send_tconX(c, sharename, "?????",
271	password, strlen(password)+1)) {
272	d_printf("tree connect failed: %s\n", cli_errstr(c));
273	cli_shutdown(c);
274	return NULL;
275	}
276
277	if (force_encrypt) {
278	status = cli_cm_force_encryption(c,
279	username,
280	password,
281	lp_workgroup(),
282	sharename);
283	if (!NT_STATUS_IS_OK(status)) {
284	cli_shutdown(c);
285	return NULL;
286	}
287	}
288
289	DEBUG(4,(" tconx ok\n"));
290	return c;
291	}
292
293	/****************************************************************************
294	****************************************************************************/
295
296	static void cli_cm_set_mntpoint(struct cli_state c, const char mnt)
297	{
298	struct client_connection *p;
299	int i;
300
301	for (p=connections,i=0; p; p=p->next,i++) {
302	if (strequal(p->cli->desthost, c->desthost) &&
303	strequal(p->cli->share, c->share)) {
304	break;
305	}
306	}
307
308	if (p) {
309	char *name = clean_name(NULL, mnt);
310	if (!name) {
311	return;
312	}
313	TALLOC_FREE(p->mount);
314	p->mount = talloc_strdup(p, name);
315	TALLOC_FREE(name);
316	}
317	}
318
319	/****************************************************************************
320	****************************************************************************/
321
322	const char cli_cm_get_mntpoint(struct cli_state c)
323	{
324	struct client_connection *p;
325	int i;
326
327	for (p=connections,i=0; p; p=p->next,i++) {
328	if (strequal(p->cli->desthost, c->desthost) &&
329	strequal(p->cli->share, c->share)) {
330	break;
331	}
332	}
333
334	if (p) {
335	return p->mount;
336	}
337	return NULL;
338	}
339
340	/********************************************************************
341	Add a new connection to the list
342	********************************************************************/
343
344	static struct cli_state cli_cm_connect(TALLOC_CTX ctx,
345	struct cli_state *referring_cli,
346	const char *server,
347	const char *share,
348	bool show_hdr,
349	bool force_encrypt)
350	{
351	struct client_connection *node;
352
353	/* NB This must be the null context here... JRA. */
354	node = TALLOC_ZERO_ARRAY(NULL, struct client_connection, 1);
355	if (!node) {
356	return NULL;
357	}
358
359	node->cli = do_connect(ctx, server, share, show_hdr, force_encrypt);
360
361	if ( !node->cli ) {
362	TALLOC_FREE( node );
363	return NULL;
364	}
365
366	DLIST_ADD( connections, node );
367
368	cli_cm_set_mntpoint(node->cli, "");
369
370	if (referring_cli && referring_cli->posix_capabilities) {
371	uint16 major, minor;
372	uint32 caplow, caphigh;
373	if (cli_unix_extensions_version(node->cli, &major,
374	&minor, &caplow, &caphigh)) {
375	cli_set_unix_extensions_capabilities(node->cli,
376	major, minor,
377	caplow, caphigh);
378	}
379	}
380
381	return node->cli;
382	}
383
384	/********************************************************************
385	Return a connection to a server.
386	********************************************************************/
387
388	static struct cli_state cli_cm_find(const char server, const char *share)
389	{
390	struct client_connection *p;
391
392	for (p=connections; p; p=p->next) {
393	if ( strequal(server, p->cli->desthost) &&
394	strequal(share,p->cli->share)) {
395	return p->cli;
396	}
397	}
398
399	return NULL;
400	}
401
402	/****************************************************************************
403	Open a client connection to a \\server\share. Set's the current *cli
404	global variable as a side-effect (but only if the connection is successful).
405	****************************************************************************/
406
407	struct cli_state cli_cm_open(TALLOC_CTX ctx,
408	struct cli_state *referring_cli,
409	const char *server,
410	const char *share,
411	bool show_hdr,
412	bool force_encrypt)
413	{
414	struct cli_state *c;
415
416	/* try to reuse an existing connection */
417
418	c = cli_cm_find(server, share);
419	if (!c) {
420	c = cli_cm_connect(ctx, referring_cli,
421	server, share, show_hdr, force_encrypt);
422	}
423
424	return c;
425	}
426
427	/****************************************************************************
428	****************************************************************************/
429
430	void cli_cm_shutdown(void)
431	{
432	struct client_connection p, x;
433
434	for (p=connections; p;) {
435	cli_shutdown(p->cli);
436	x = p;
437	p = p->next;
438
439	TALLOC_FREE(x);
440	}
441
442	connections = NULL;
443	return;
444	}
445
446	/****************************************************************************
447	****************************************************************************/
448
449	void cli_cm_display(void)
450	{
451	struct client_connection *p;
452	int i;
453
454	for ( p=connections,i=0; p; p=p->next,i++ ) {
455	d_printf("%d:\tserver=%s, share=%s\n",
456	i, p->cli->desthost, p->cli->share );
457	}
458	}
459
460	/****************************************************************************
461	****************************************************************************/
462
463	static void cm_set_password(const char *newpass)
464	{
465	SAFE_FREE(cm_creds.password);
466	cm_creds.password = SMB_STRDUP(newpass);
467	if (cm_creds.password) {
468	cm_creds.got_pass = true;
469	}
470	}
471
472	/****************************************************************************
473	****************************************************************************/
474
475	void cli_cm_set_credentials(void)
476	{
477	SAFE_FREE(cm_creds.username);
478	cm_creds.username = SMB_STRDUP(get_cmdline_auth_info_username());
479
480	if (get_cmdline_auth_info_got_pass()) {
481	cm_set_password(get_cmdline_auth_info_password());
482	}
483
484	cm_creds.use_kerberos = get_cmdline_auth_info_use_kerberos();
485	cm_creds.fallback_after_kerberos = false;
486	cm_creds.signing_state = get_cmdline_auth_info_signing_state();
487	}
488
489	/****************************************************************************
490	****************************************************************************/
491
492	void cli_cm_set_port(int port_number)
493	{
494	port = port_number;
495	}
496
497	/****************************************************************************
498	****************************************************************************/
499
500	void cli_cm_set_dest_name_type(int type)
501	{
502	name_type = type;
503	}
504
505	/****************************************************************************
506	****************************************************************************/
507
508	void cli_cm_set_signing_state(int state)
509	{
510	cm_creds.signing_state = state;
511	}
512
513	/****************************************************************************
514	****************************************************************************/
515
516	void cli_cm_set_username(const char *username)
517	{
518	SAFE_FREE(cm_creds.username);
519	cm_creds.username = SMB_STRDUP(username);
520	}
521
522	/****************************************************************************
523	****************************************************************************/
524
525	void cli_cm_set_password(const char *newpass)
526	{
527	SAFE_FREE(cm_creds.password);
528	cm_creds.password = SMB_STRDUP(newpass);
529	if (cm_creds.password) {
530	cm_creds.got_pass = true;
531	}
532	}
533
534	/****************************************************************************
535	****************************************************************************/
536
537	void cli_cm_set_use_kerberos(void)
538	{
539	cm_creds.use_kerberos = true;
540	}
541
542	/****************************************************************************
543	****************************************************************************/
544
545	void cli_cm_set_fallback_after_kerberos(void)
546	{
547	cm_creds.fallback_after_kerberos = true;
548	}
549
550	/****************************************************************************
551	****************************************************************************/
552
553	void cli_cm_set_dest_ss(struct sockaddr_storage *pss)
554	{
555	dest_ss = *pss;
556	have_ip = true;
557	}
558
559	/**********************************************************************
560	split a dfs path into the server, share name, and extrapath components
561	**********************************************************************/
562
563	static void split_dfs_path(TALLOC_CTX *ctx,
564	const char *nodepath,
565	char **pp_server,
566	char **pp_share,
567	char **pp_extrapath)
568	{
569	char p, q;
570	char *path;
571
572	*pp_server = NULL;
573	*pp_share = NULL;
574	*pp_extrapath = NULL;
575
576	path = talloc_strdup(ctx, nodepath);
577	if (!path) {
578	return;
579	}
580
581	if ( path[0] != '\\' ) {
582	return;
583	}
584
585	p = strchr_m( path + 1, '\\' );
586	if ( !p ) {
587	return;
588	}
589
590	*p = '\0';
591	p++;
592
593	/* Look for any extra/deep path */
594	q = strchr_m(p, '\\');
595	if (q != NULL) {
596	*q = '\0';
597	q++;
598	*pp_extrapath = talloc_strdup(ctx, q);
599	} else {
600	*pp_extrapath = talloc_strdup(ctx, "");
601	}
602
603	*pp_share = talloc_strdup(ctx, p);
604	*pp_server = talloc_strdup(ctx, &path[1]);
605	}
606
607	/****************************************************************************
608	Return the original path truncated at the directory component before
609	the first wildcard character. Trust the caller to provide a NULL
610	terminated string
611	****************************************************************************/
612
613	static char clean_path(TALLOC_CTX ctx, const char *path)
614	{
615	size_t len;
616	char p1, p2, *p;
617	char *path_out;
618
619	/* No absolute paths. */
620	while (IS_DIRECTORY_SEP(*path)) {
621	path++;
622	}
623
624	path_out = talloc_strdup(ctx, path);
625	if (!path_out) {
626	return NULL;
627	}
628
629	p1 = strchr_m(path_out, '*');
630	p2 = strchr_m(path_out, '?');
631
632	if (p1 \|\| p2) {
633	if (p1 && p2) {
634	p = MIN(p1,p2);
635	} else if (!p1) {
636	p = p2;
637	} else {
638	p = p1;
639	}
640	*p = '\0';
641
642	/* Now go back to the start of this component. */
643	p1 = strrchr_m(path_out, '/');
644	p2 = strrchr_m(path_out, '\\');
645	p = MAX(p1,p2);
646	if (p) {
647	*p = '\0';
648	}
649	}
650
651	/* Strip any trailing separator */
652
653	len = strlen(path_out);
654	if ( (len > 0) && IS_DIRECTORY_SEP(path_out[len-1])) {
655	path_out[len-1] = '\0';
656	}
657
658	return path_out;
659	}
660
661	/****************************************************************************
662	****************************************************************************/
663
664	static char cli_dfs_make_full_path(TALLOC_CTX ctx,
665	struct cli_state *cli,
666	const char *dir)
667	{
668	/* Ensure the extrapath doesn't start with a separator. */
669	while (IS_DIRECTORY_SEP(*dir)) {
670	dir++;
671	}
672
673	return talloc_asprintf(ctx, "\\%s\\%s\\%s",
674	cli->desthost, cli->share, dir);
675	}
676
677	/********************************************************************
678	check for dfs referral
679	********************************************************************/
680
681	static bool cli_dfs_check_error( struct cli_state *cli, NTSTATUS status )
682	{
683	uint32 flgs2 = SVAL(cli->inbuf,smb_flg2);
684
685	/* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
686
687	if (!((flgs2&FLAGS2_32_BIT_ERROR_CODES) &&
688	(flgs2&FLAGS2_UNICODE_STRINGS)))
689	return false;
690
691	if (NT_STATUS_EQUAL(status, NT_STATUS(IVAL(cli->inbuf,smb_rcls))))
692	return true;
693
694	return false;
695	}
696
697	/********************************************************************
698	Get the dfs referral link.
699	********************************************************************/
700
701	bool cli_dfs_get_referral(TALLOC_CTX *ctx,
702	struct cli_state *cli,
703	const char *path,
704	CLIENT_DFS_REFERRAL**refs,
705	size_t *num_refs,
706	uint16 *consumed)
707	{
708	unsigned int data_len = 0;
709	unsigned int param_len = 0;
710	uint16 setup = TRANSACT2_GET_DFS_REFERRAL;
711	char *param;
712	char rparam=NULL, rdata=NULL;
713	char *p;
714	char *endp;
715	size_t pathlen = 2*(strlen(path)+1);
716	uint16 num_referrals;
717	CLIENT_DFS_REFERRAL *referrals = NULL;
718	bool ret = false;
719
720	*num_refs = 0;
721	*refs = NULL;
722
723	param = SMB_MALLOC_ARRAY(char, 2+pathlen+2);
724	if (!param) {
725	return false;
726	}
727	SSVAL(param, 0, 0x03); /* max referral level */
728	p = &param[2];
729
730	p += clistr_push(cli, p, path, pathlen, STR_TERMINATE);
731	param_len = PTR_DIFF(p, param);
732
733	if (!cli_send_trans(cli, SMBtrans2,
734	NULL, /* name */
735	-1, 0, /* fid, flags */
736	&setup, 1, 0, /* setup, length, max */
737	param, param_len, 2, /* param, length, max */
738	NULL, 0, cli->max_xmit /* data, length, max */
739	)) {
740	SAFE_FREE(param);
741	return false;
742	}
743
744	SAFE_FREE(param);
745
746	if (!cli_receive_trans(cli, SMBtrans2,
747	&rparam, &param_len,
748	&rdata, &data_len)) {
749	return false;
750	}
751
752	if (data_len < 4) {
753	goto out;
754	}
755
756	endp = rdata + data_len;
757
758	*consumed = SVAL(rdata, 0);
759	num_referrals = SVAL(rdata, 2);
760
761	if (num_referrals != 0) {
762	uint16 ref_version;
763	uint16 ref_size;
764	int i;
765	uint16 node_offset;
766
767	referrals = TALLOC_ARRAY(ctx, CLIENT_DFS_REFERRAL,
768	num_referrals);
769
770	if (!referrals) {
771	goto out;
772	}
773	/* start at the referrals array */
774
775	p = rdata+8;
776	for (i=0; i<num_referrals && p < endp; i++) {
777	if (p + 18 > endp) {
778	goto out;
779	}
780	ref_version = SVAL(p, 0);
781	ref_size = SVAL(p, 2);
782	node_offset = SVAL(p, 16);
783
784	if (ref_version != 3) {
785	p += ref_size;
786	continue;
787	}
788
789	referrals[i].proximity = SVAL(p, 8);
790	referrals[i].ttl = SVAL(p, 10);
791
792	if (p + node_offset > endp) {
793	goto out;
794	}
795	clistr_pull_talloc(ctx, cli, &referrals[i].dfspath,
796	p+node_offset, -1,
797	STR_TERMINATE\|STR_UNICODE );
798
799	if (!referrals[i].dfspath) {
800	goto out;
801	}
802	p += ref_size;
803	}
804	if (i < num_referrals) {
805	goto out;
806	}
807	}
808
809	ret = true;
810
811	*num_refs = num_referrals;
812	*refs = referrals;
813
814	out:
815
816	SAFE_FREE(rdata);
817	SAFE_FREE(rparam);
818	return ret;
819	}
820
821	/********************************************************************
822	********************************************************************/
823
824	bool cli_resolve_path(TALLOC_CTX *ctx,
825	const char *mountpt,
826	struct cli_state *rootcli,
827	const char *path,
828	struct cli_state **targetcli,
829	char **pp_targetpath)
830	{
831	CLIENT_DFS_REFERRAL *refs = NULL;
832	size_t num_refs = 0;
833	uint16 consumed;
834	struct cli_state *cli_ipc = NULL;
835	char *dfs_path = NULL;
836	char *cleanpath = NULL;
837	char *extrapath = NULL;
838	int pathlen;
839	char *server = NULL;
840	char *share = NULL;
841	struct cli_state *newcli = NULL;
842	char *newpath = NULL;
843	char *newmount = NULL;
844	char *ppath = NULL;
845	SMB_STRUCT_STAT sbuf;
846	uint32 attributes;
847
848	if ( !rootcli \|\| !path \|\| !targetcli ) {
849	return false;
850	}
851
852	/* Don't do anything if this is not a DFS root. */
853
854	if ( !rootcli->dfsroot) {
855	*targetcli = rootcli;
856	*pp_targetpath = talloc_strdup(ctx, path);
857	if (!*pp_targetpath) {
858	return false;
859	}
860	return true;
861	}
862
863	*targetcli = NULL;
864
865	/* Send a trans2_query_path_info to check for a referral. */
866
867	cleanpath = clean_path(ctx, path);
868	if (!cleanpath) {
869	return false;
870	}
871
872	dfs_path = cli_dfs_make_full_path(ctx, rootcli, cleanpath);
873	if (!dfs_path) {
874	return false;
875	}
876
877	if (cli_qpathinfo_basic( rootcli, dfs_path, &sbuf, &attributes)) {
878	/* This is an ordinary path, just return it. */
879	*targetcli = rootcli;
880	*pp_targetpath = talloc_strdup(ctx, path);
881	if (!*pp_targetpath) {
882	return false;
883	}
884	goto done;
885	}
886
887	/* Special case where client asked for a path that does not exist */
888
889	if (cli_dfs_check_error(rootcli, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
890	*targetcli = rootcli;
891	*pp_targetpath = talloc_strdup(ctx, path);
892	if (!*pp_targetpath) {
893	return false;
894	}
895	goto done;
896	}
897
898	/* We got an error, check for DFS referral. */
899
900	if (!cli_dfs_check_error(rootcli, NT_STATUS_PATH_NOT_COVERED)) {
901	return false;
902	}
903
904	/* Check for the referral. */
905
906	if (!(cli_ipc = cli_cm_open(ctx, rootcli,
907	rootcli->desthost,
908	"IPC$", false,
909	(rootcli->trans_enc_state != NULL)))) {
910	return false;
911	}
912
913	if (!cli_dfs_get_referral(ctx, cli_ipc, dfs_path, &refs,
914	&num_refs, &consumed) \|\| !num_refs) {
915	return false;
916	}
917
918	/* Just store the first referral for now. */
919
920	if (!refs[0].dfspath) {
921	return false;
922	}
923	split_dfs_path(ctx, refs[0].dfspath, &server, &share, &extrapath );
924
925	if (!server \|\| !share) {
926	return false;
927	}
928
929	/* Make sure to recreate the original string including any wildcards. */
930
931	dfs_path = cli_dfs_make_full_path(ctx, rootcli, path);
932	if (!dfs_path) {
933	return false;
934	}
935	pathlen = strlen(dfs_path)*2;
936	consumed = MIN(pathlen, consumed);
937	*pp_targetpath = talloc_strdup(ctx, &dfs_path[consumed/2]);
938	if (!*pp_targetpath) {
939	return false;
940	}
941	dfs_path[consumed/2] = '\0';
942
943	/*
944	* *pp_targetpath is now the unconsumed part of the path.
945	* dfs_path is now the consumed part of the path
946	* (in \server\share\path format).
947	*/
948
949	/* Open the connection to the target server & share */
950	if ((*targetcli = cli_cm_open(ctx, rootcli,
951	server,
952	share,
953	false,
954	(rootcli->trans_enc_state != NULL))) == NULL) {
955	d_printf("Unable to follow dfs referral [\\%s\\%s]\n",
956	server, share );
957	return false;
958	}
959
960	if (extrapath && strlen(extrapath) > 0) {
961	*pp_targetpath = talloc_asprintf(ctx,
962	"%s%s",
963	extrapath,
964	*pp_targetpath);
965	if (!*pp_targetpath) {
966	return false;
967	}
968	}
969
970	/* parse out the consumed mount path */
971	/* trim off the \server\share\ */
972
973	ppath = dfs_path;
974
975	if (*ppath != '\\') {
976	d_printf("cli_resolve_path: "
977	"dfs_path (%s) not in correct format.\n",
978	dfs_path );
979	return false;
980	}
981
982	ppath++; /* Now pointing at start of server name. */
983
984	if ((ppath = strchr_m( dfs_path, '\\' )) == NULL) {
985	return false;
986	}
987
988	ppath++; /* Now pointing at start of share name. */
989
990	if ((ppath = strchr_m( ppath+1, '\\' )) == NULL) {
991	return false;
992	}
993
994	ppath++; /* Now pointing at path component. */
995
996	newmount = talloc_asprintf(ctx, "%s\\%s", mountpt, ppath );
997	if (!newmount) {
998	return false;
999	}
1000
1001	cli_cm_set_mntpoint(*targetcli, newmount);
1002
1003	/* Check for another dfs referral, note that we are not
1004	checking for loops here. */
1005
1006	if (!strequal(pp_targetpath, "\\") && !strequal(pp_targetpath, "/")) {
1007	if (cli_resolve_path(ctx,
1008	newmount,
1009	*targetcli,
1010	*pp_targetpath,
1011	&newcli,
1012	&newpath)) {
1013	/*
1014	* When cli_resolve_path returns true here it's always
1015	* returning the complete path in newpath, so we're done
1016	* here.
1017	*/
1018	*targetcli = newcli;
1019	*pp_targetpath = newpath;
1020	return true;
1021	}
1022	}
1023
1024	done:
1025
1026	/* If returning true ensure we return a dfs root full path. */
1027	if ((*targetcli)->dfsroot) {
1028	dfs_path = talloc_strdup(ctx, *pp_targetpath);
1029	if (!dfs_path) {
1030	return false;
1031	}
1032	pp_targetpath = cli_dfs_make_full_path(ctx, targetcli, dfs_path);
1033	}
1034
1035	return true;
1036	}
1037
1038	/********************************************************************
1039	********************************************************************/
1040
1041	static bool cli_check_msdfs_proxy(TALLOC_CTX *ctx,
1042	struct cli_state *cli,
1043	const char *sharename,
1044	char **pp_newserver,
1045	char **pp_newshare,
1046	bool force_encrypt,
1047	const char *username,
1048	const char *password,
1049	const char *domain)
1050	{
1051	CLIENT_DFS_REFERRAL *refs = NULL;
1052	size_t num_refs = 0;
1053	uint16 consumed;
1054	char *fullpath = NULL;
1055	bool res;
1056	uint16 cnum;
1057	char *newextrapath = NULL;
1058
1059	if (!cli \|\| !sharename) {
1060	return false;
1061	}
1062
1063	cnum = cli->cnum;
1064
1065	/* special case. never check for a referral on the IPC$ share */
1066
1067	if (strequal(sharename, "IPC$")) {
1068	return false;
1069	}
1070
1071	/* send a trans2_query_path_info to check for a referral */
1072
1073	fullpath = talloc_asprintf(ctx, "\\%s\\%s", cli->desthost, sharename );
1074	if (!fullpath) {
1075	return false;
1076	}
1077
1078	/* check for the referral */
1079
1080	if (!cli_send_tconX(cli, "IPC$", "IPC", NULL, 0)) {
1081	return false;
1082	}
1083
1084	if (force_encrypt) {
1085	NTSTATUS status = cli_cm_force_encryption(cli,
1086	username,
1087	password,
1088	lp_workgroup(),
1089	"IPC$");
1090	if (!NT_STATUS_IS_OK(status)) {
1091	return false;
1092	}
1093	}
1094
1095	res = cli_dfs_get_referral(ctx, cli, fullpath, &refs, &num_refs, &consumed);
1096
1097	if (!cli_tdis(cli)) {
1098	return false;
1099	}
1100
1101	cli->cnum = cnum;
1102
1103	if (!res \|\| !num_refs) {
1104	return false;
1105	}
1106
1107	if (!refs[0].dfspath) {
1108	return false;
1109	}
1110
1111	split_dfs_path(ctx, refs[0].dfspath, pp_newserver,
1112	pp_newshare, &newextrapath );
1113
1114	if ((pp_newserver == NULL) \|\| (pp_newshare == NULL)) {
1115	return false;
1116	}
1117
1118	/* check that this is not a self-referral */
1119
1120	if (strequal(cli->desthost, *pp_newserver) &&
1121	strequal(sharename, *pp_newshare)) {
1122	return false;
1123	}
1124
1125	return true;
1126	}

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