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
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/>.
24 /********************************************************************
27 DFS paths are *always* of the form \server\share\<pathname> (the \ characters
28 are not C escaped here).
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 ********************************************************************/
35 struct client_connection
{
36 struct client_connection
*prev
, *next
;
37 struct cli_state
*cli
;
41 /* global state....globals reek! */
42 int max_protocol
= PROTOCOL_NT1
;
44 static struct cm_cred_struct
{
52 static void cm_set_password(const char *newpass
);
55 static int name_type
= 0x20;
57 static struct sockaddr_storage dest_ss
;
59 static struct client_connection
*connections
;
61 static bool cli_check_msdfs_proxy(TALLOC_CTX
*ctx
,
62 struct cli_state
*cli
,
63 const char *sharename
,
71 /********************************************************************
72 Ensure a connection is encrypted.
73 ********************************************************************/
75 NTSTATUS
cli_cm_force_encryption(struct cli_state
*c
,
79 const char *sharename
)
81 NTSTATUS status
= cli_force_encryption(c
,
86 if (NT_STATUS_EQUAL(status
,NT_STATUS_NOT_SUPPORTED
)) {
87 d_printf("Encryption required and "
88 "server that doesn't support "
89 "UNIX extensions - failing connect\n");
90 } else if (NT_STATUS_EQUAL(status
,NT_STATUS_UNKNOWN_REVISION
)) {
91 d_printf("Encryption required and "
92 "can't get UNIX CIFS extensions "
93 "version from server.\n");
94 } else if (NT_STATUS_EQUAL(status
,NT_STATUS_UNSUPPORTED_COMPRESSION
)) {
95 d_printf("Encryption required and "
96 "share %s doesn't support "
97 "encryption.\n", sharename
);
98 } else if (!NT_STATUS_IS_OK(status
)) {
99 d_printf("Encryption required and "
100 "setup failed with error %s.\n",
107 /********************************************************************
108 Return a connection to a server.
109 ********************************************************************/
111 static struct cli_state
*do_connect(TALLOC_CTX
*ctx
,
117 struct cli_state
*c
= NULL
;
118 struct nmb_name called
, calling
;
119 const char *server_n
;
120 struct sockaddr_storage ss
;
123 char *newserver
, *newshare
;
124 const char *username
;
125 const char *password
;
128 /* make a copy so we don't modify the global string 'service' */
129 servicename
= talloc_strdup(ctx
,share
);
133 sharename
= servicename
;
134 if (*sharename
== '\\') {
135 server
= sharename
+2;
136 sharename
= strchr_m(server
,'\\');
148 make_nmb_name(&calling
, global_myname(), 0x0);
149 make_nmb_name(&called
, server
, name_type
);
156 /* have to open a new connection */
157 if (!(c
=cli_initialise()) || (cli_set_port(c
, port
) != port
)) {
158 d_printf("Connection to %s failed\n", server_n
);
164 status
= cli_connect(c
, server_n
, &ss
);
165 if (!NT_STATUS_IS_OK(status
)) {
166 d_printf("Connection to %s failed (Error %s)\n",
173 c
->protocol
= max_protocol
;
174 c
->use_kerberos
= cm_creds
.use_kerberos
;
175 cli_setup_signing_state(c
, cm_creds
.signing_state
);
177 if (!cli_session_request(c
, &calling
, &called
)) {
179 d_printf("session request to %s failed (%s)\n",
180 called
.name
, cli_errstr(c
));
183 if ((p
=strchr_m(called
.name
, '.'))) {
187 if (strcmp(called
.name
, "*SMBSERVER")) {
188 make_nmb_name(&called
, "*SMBSERVER", 0x20);
194 DEBUG(4,(" session request ok\n"));
196 if (!cli_negprot(c
)) {
197 d_printf("protocol negotiation failed\n");
202 if (!cm_creds
.got_pass
) {
203 char *pass
= getpass("Password: ");
205 cm_set_password(pass
);
209 username
= cm_creds
.username
? cm_creds
.username
: "";
210 password
= cm_creds
.password
? cm_creds
.password
: "";
212 if (!NT_STATUS_IS_OK(cli_session_setup(c
, username
,
213 password
, strlen(password
),
214 password
, strlen(password
),
216 /* If a password was not supplied then
217 * try again with a null username. */
218 if (password
[0] || !username
[0] || cm_creds
.use_kerberos
||
219 !NT_STATUS_IS_OK(cli_session_setup(c
, "",
223 d_printf("session setup failed: %s\n", cli_errstr(c
));
224 if (NT_STATUS_V(cli_nt_error(c
)) ==
225 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED
))
226 d_printf("did you forget to run kinit?\n");
230 d_printf("Anonymous login successful\n");
233 if ( show_sessetup
) {
234 if (*c
->server_domain
) {
235 DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
236 c
->server_domain
,c
->server_os
,c
->server_type
));
237 } else if (*c
->server_os
|| *c
->server_type
) {
238 DEBUG(0,("OS=[%s] Server=[%s]\n",
239 c
->server_os
,c
->server_type
));
242 DEBUG(4,(" session setup ok\n"));
244 /* here's the fun part....to support 'msdfs proxy' shares
245 (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
246 here before trying to connect to the original share.
247 check_dfs_proxy() will fail if it is a normal share. */
249 if ((c
->capabilities
& CAP_DFS
) &&
250 cli_check_msdfs_proxy(ctx
, c
, sharename
,
251 &newserver
, &newshare
,
257 return do_connect(ctx
, newserver
,
258 newshare
, false, force_encrypt
);
261 /* must be a normal share */
263 if (!cli_send_tconX(c
, sharename
, "?????",
264 password
, strlen(password
)+1)) {
265 d_printf("tree connect failed: %s\n", cli_errstr(c
));
271 status
= cli_cm_force_encryption(c
,
276 if (!NT_STATUS_IS_OK(status
)) {
282 DEBUG(4,(" tconx ok\n"));
286 /****************************************************************************
287 ****************************************************************************/
289 static void cli_cm_set_mntpoint(struct cli_state
*c
, const char *mnt
)
291 struct client_connection
*p
;
294 for (p
=connections
,i
=0; p
; p
=p
->next
,i
++) {
295 if (strequal(p
->cli
->desthost
, c
->desthost
) &&
296 strequal(p
->cli
->share
, c
->share
)) {
302 char *name
= clean_name(NULL
, p
->mount
);
306 p
->mount
= talloc_strdup(p
, name
);
311 /****************************************************************************
312 ****************************************************************************/
314 const char *cli_cm_get_mntpoint(struct cli_state
*c
)
316 struct client_connection
*p
;
319 for (p
=connections
,i
=0; p
; p
=p
->next
,i
++) {
320 if (strequal(p
->cli
->desthost
, c
->desthost
) &&
321 strequal(p
->cli
->share
, c
->share
)) {
332 /********************************************************************
333 Add a new connection to the list
334 ********************************************************************/
336 static struct cli_state
*cli_cm_connect(TALLOC_CTX
*ctx
,
337 struct cli_state
*referring_cli
,
343 struct client_connection
*node
;
345 /* NB This must be the null context here... JRA. */
346 node
= TALLOC_ZERO_ARRAY(NULL
, struct client_connection
, 1);
351 node
->cli
= do_connect(ctx
, server
, share
, show_hdr
, force_encrypt
);
358 DLIST_ADD( connections
, node
);
360 cli_cm_set_mntpoint(node
->cli
, "");
362 if (referring_cli
&& referring_cli
->posix_capabilities
) {
364 uint32 caplow
, caphigh
;
365 if (cli_unix_extensions_version(node
->cli
, &major
,
366 &minor
, &caplow
, &caphigh
)) {
367 cli_set_unix_extensions_capabilities(node
->cli
,
376 /********************************************************************
377 Return a connection to a server.
378 ********************************************************************/
380 static struct cli_state
*cli_cm_find(const char *server
, const char *share
)
382 struct client_connection
*p
;
384 for (p
=connections
; p
; p
=p
->next
) {
385 if ( strequal(server
, p
->cli
->desthost
) &&
386 strequal(share
,p
->cli
->share
)) {
394 /****************************************************************************
395 Open a client connection to a \\server\share. Set's the current *cli
396 global variable as a side-effect (but only if the connection is successful).
397 ****************************************************************************/
399 struct cli_state
*cli_cm_open(TALLOC_CTX
*ctx
,
400 struct cli_state
*referring_cli
,
408 /* try to reuse an existing connection */
410 c
= cli_cm_find(server
, share
);
412 c
= cli_cm_connect(ctx
, referring_cli
,
413 server
, share
, show_hdr
, force_encrypt
);
419 /****************************************************************************
420 ****************************************************************************/
422 void cli_cm_shutdown(void)
424 struct client_connection
*p
, *x
;
426 for (p
=connections
; p
;) {
427 cli_shutdown(p
->cli
);
438 /****************************************************************************
439 ****************************************************************************/
441 void cli_cm_display(void)
443 struct client_connection
*p
;
446 for ( p
=connections
,i
=0; p
; p
=p
->next
,i
++ ) {
447 d_printf("%d:\tserver=%s, share=%s\n",
448 i
, p
->cli
->desthost
, p
->cli
->share
);
452 /****************************************************************************
453 ****************************************************************************/
455 static void cm_set_password(const char *newpass
)
457 SAFE_FREE(cm_creds
.password
);
458 cm_creds
.password
= SMB_STRDUP(newpass
);
459 if (cm_creds
.password
) {
460 cm_creds
.got_pass
= true;
464 void cli_cm_set_credentials(void)
466 SAFE_FREE(cm_creds
.username
);
467 cm_creds
.username
= SMB_STRDUP(get_cmdline_auth_info_username());
469 if (get_cmdline_auth_info_got_pass()) {
470 cm_set_password(get_cmdline_auth_info_password());
473 cm_creds
.use_kerberos
= get_cmdline_auth_info_use_kerberos();
474 cm_creds
.signing_state
= get_cmdline_auth_info_signing_state();
477 /****************************************************************************
478 ****************************************************************************/
480 void cli_cm_set_port(int port_number
)
485 /****************************************************************************
486 ****************************************************************************/
488 void cli_cm_set_dest_name_type(int type
)
493 /****************************************************************************
494 ****************************************************************************/
496 void cli_cm_set_dest_ss(struct sockaddr_storage
*pss
)
502 /**********************************************************************
503 split a dfs path into the server, share name, and extrapath components
504 **********************************************************************/
506 static void split_dfs_path(TALLOC_CTX
*ctx
,
507 const char *nodepath
,
517 *pp_extrapath
= NULL
;
519 path
= talloc_strdup(ctx
, nodepath
);
524 if ( path
[0] != '\\' ) {
528 p
= strchr_m( path
+ 1, '\\' );
536 /* Look for any extra/deep path */
537 q
= strchr_m(p
, '\\');
541 *pp_extrapath
= talloc_strdup(ctx
, q
);
543 *pp_extrapath
= talloc_strdup(ctx
, "");
546 *pp_share
= talloc_strdup(ctx
, p
);
547 *pp_server
= talloc_strdup(ctx
, &path
[1]);
550 /****************************************************************************
551 Return the original path truncated at the directory component before
552 the first wildcard character. Trust the caller to provide a NULL
554 ****************************************************************************/
556 static char *clean_path(TALLOC_CTX
*ctx
, const char *path
)
562 /* No absolute paths. */
563 while (IS_DIRECTORY_SEP(*path
)) {
567 path_out
= talloc_strdup(ctx
, path
);
572 p1
= strchr_m(path_out
, '*');
573 p2
= strchr_m(path_out
, '?');
585 /* Now go back to the start of this component. */
586 p1
= strrchr_m(path_out
, '/');
587 p2
= strrchr_m(path_out
, '\\');
594 /* Strip any trailing separator */
596 len
= strlen(path_out
);
597 if ( (len
> 0) && IS_DIRECTORY_SEP(path_out
[len
-1])) {
598 path_out
[len
-1] = '\0';
604 /****************************************************************************
605 ****************************************************************************/
607 static char *cli_dfs_make_full_path(TALLOC_CTX
*ctx
,
608 struct cli_state
*cli
,
611 /* Ensure the extrapath doesn't start with a separator. */
612 while (IS_DIRECTORY_SEP(*dir
)) {
616 return talloc_asprintf(ctx
, "\\%s\\%s\\%s",
617 cli
->desthost
, cli
->share
, dir
);
620 /********************************************************************
621 check for dfs referral
622 ********************************************************************/
624 static bool cli_dfs_check_error( struct cli_state
*cli
, NTSTATUS status
)
626 uint32 flgs2
= SVAL(cli
->inbuf
,smb_flg2
);
628 /* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
630 if (!((flgs2
&FLAGS2_32_BIT_ERROR_CODES
) &&
631 (flgs2
&FLAGS2_UNICODE_STRINGS
)))
634 if (NT_STATUS_EQUAL(status
, NT_STATUS(IVAL(cli
->inbuf
,smb_rcls
))))
640 /********************************************************************
641 Get the dfs referral link.
642 ********************************************************************/
644 bool cli_dfs_get_referral(TALLOC_CTX
*ctx
,
645 struct cli_state
*cli
,
647 CLIENT_DFS_REFERRAL
**refs
,
651 unsigned int data_len
= 0;
652 unsigned int param_len
= 0;
653 uint16 setup
= TRANSACT2_GET_DFS_REFERRAL
;
655 char *rparam
=NULL
, *rdata
=NULL
;
658 size_t pathlen
= 2*(strlen(path
)+1);
659 uint16 num_referrals
;
660 CLIENT_DFS_REFERRAL
*referrals
= NULL
;
666 param
= SMB_MALLOC_ARRAY(char, 2+pathlen
+2);
670 SSVAL(param
, 0, 0x03); /* max referral level */
673 p
+= clistr_push(cli
, p
, path
, pathlen
, STR_TERMINATE
);
674 param_len
= PTR_DIFF(p
, param
);
676 if (!cli_send_trans(cli
, SMBtrans2
,
678 -1, 0, /* fid, flags */
679 &setup
, 1, 0, /* setup, length, max */
680 param
, param_len
, 2, /* param, length, max */
681 NULL
, 0, cli
->max_xmit
/* data, length, max */
689 if (!cli_receive_trans(cli
, SMBtrans2
,
691 &rdata
, &data_len
)) {
699 endp
= rdata
+ data_len
;
701 *consumed
= SVAL(rdata
, 0);
702 num_referrals
= SVAL(rdata
, 2);
704 if (num_referrals
!= 0) {
710 referrals
= TALLOC_ARRAY(ctx
, CLIENT_DFS_REFERRAL
,
716 /* start at the referrals array */
719 for (i
=0; i
<num_referrals
&& p
< endp
; i
++) {
723 ref_version
= SVAL(p
, 0);
724 ref_size
= SVAL(p
, 2);
725 node_offset
= SVAL(p
, 16);
727 if (ref_version
!= 3) {
732 referrals
[i
].proximity
= SVAL(p
, 8);
733 referrals
[i
].ttl
= SVAL(p
, 10);
735 if (p
+ node_offset
> endp
) {
738 clistr_pull_talloc(ctx
, cli
, &referrals
[i
].dfspath
,
740 STR_TERMINATE
|STR_UNICODE
);
742 if (!referrals
[i
].dfspath
) {
747 if (i
< num_referrals
) {
754 *num_refs
= num_referrals
;
764 /********************************************************************
765 ********************************************************************/
767 bool cli_resolve_path(TALLOC_CTX
*ctx
,
769 struct cli_state
*rootcli
,
771 struct cli_state
**targetcli
,
772 char **pp_targetpath
)
774 CLIENT_DFS_REFERRAL
*refs
= NULL
;
777 struct cli_state
*cli_ipc
= NULL
;
778 char *dfs_path
= NULL
;
779 char *cleanpath
= NULL
;
780 char *extrapath
= NULL
;
784 struct cli_state
*newcli
= NULL
;
785 char *newpath
= NULL
;
786 char *newmount
= NULL
;
788 SMB_STRUCT_STAT sbuf
;
791 if ( !rootcli
|| !path
|| !targetcli
) {
795 /* Don't do anything if this is not a DFS root. */
797 if ( !rootcli
->dfsroot
) {
798 *targetcli
= rootcli
;
799 *pp_targetpath
= talloc_strdup(ctx
, path
);
800 if (!*pp_targetpath
) {
808 /* Send a trans2_query_path_info to check for a referral. */
810 cleanpath
= clean_path(ctx
, path
);
815 dfs_path
= cli_dfs_make_full_path(ctx
, rootcli
, cleanpath
);
820 if (cli_qpathinfo_basic( rootcli
, dfs_path
, &sbuf
, &attributes
)) {
821 /* This is an ordinary path, just return it. */
822 *targetcli
= rootcli
;
823 *pp_targetpath
= talloc_strdup(ctx
, path
);
824 if (!*pp_targetpath
) {
830 /* Special case where client asked for a path that does not exist */
832 if (cli_dfs_check_error(rootcli
, NT_STATUS_OBJECT_NAME_NOT_FOUND
)) {
833 *targetcli
= rootcli
;
834 *pp_targetpath
= talloc_strdup(ctx
, path
);
835 if (!*pp_targetpath
) {
841 /* We got an error, check for DFS referral. */
843 if (!cli_dfs_check_error(rootcli
, NT_STATUS_PATH_NOT_COVERED
)) {
847 /* Check for the referral. */
849 if (!(cli_ipc
= cli_cm_open(ctx
, rootcli
,
852 (rootcli
->trans_enc_state
!= NULL
)))) {
856 if (!cli_dfs_get_referral(ctx
, cli_ipc
, dfs_path
, &refs
,
857 &num_refs
, &consumed
) || !num_refs
) {
861 /* Just store the first referral for now. */
863 if (!refs
[0].dfspath
) {
866 split_dfs_path(ctx
, refs
[0].dfspath
, &server
, &share
, &extrapath
);
868 if (!server
|| !share
) {
872 /* Make sure to recreate the original string including any wildcards. */
874 dfs_path
= cli_dfs_make_full_path(ctx
, rootcli
, path
);
878 pathlen
= strlen(dfs_path
)*2;
879 consumed
= MIN(pathlen
, consumed
);
880 *pp_targetpath
= talloc_strdup(ctx
, &dfs_path
[consumed
/2]);
881 if (!*pp_targetpath
) {
884 dfs_path
[consumed
/2] = '\0';
887 * *pp_targetpath is now the unconsumed part of the path.
888 * dfs_path is now the consumed part of the path
889 * (in \server\share\path format).
892 /* Open the connection to the target server & share */
893 if ((*targetcli
= cli_cm_open(ctx
, rootcli
,
897 (rootcli
->trans_enc_state
!= NULL
))) == NULL
) {
898 d_printf("Unable to follow dfs referral [\\%s\\%s]\n",
903 if (extrapath
&& strlen(extrapath
) > 0) {
904 *pp_targetpath
= talloc_asprintf(ctx
,
908 if (!*pp_targetpath
) {
913 /* parse out the consumed mount path */
914 /* trim off the \server\share\ */
918 if (*ppath
!= '\\') {
919 d_printf("cli_resolve_path: "
920 "dfs_path (%s) not in correct format.\n",
925 ppath
++; /* Now pointing at start of server name. */
927 if ((ppath
= strchr_m( dfs_path
, '\\' )) == NULL
) {
931 ppath
++; /* Now pointing at start of share name. */
933 if ((ppath
= strchr_m( ppath
+1, '\\' )) == NULL
) {
937 ppath
++; /* Now pointing at path component. */
939 newmount
= talloc_asprintf(ctx
, "%s\\%s", mountpt
, ppath
);
944 cli_cm_set_mntpoint(*targetcli
, newmount
);
946 /* Check for another dfs referral, note that we are not
947 checking for loops here. */
949 if (!strequal(*pp_targetpath
, "\\") && !strequal(*pp_targetpath
, "/")) {
950 if (cli_resolve_path(ctx
,
957 * When cli_resolve_path returns true here it's always
958 * returning the complete path in newpath, so we're done
962 *pp_targetpath
= newpath
;
969 /* If returning true ensure we return a dfs root full path. */
970 if ((*targetcli
)->dfsroot
) {
971 dfs_path
= talloc_strdup(ctx
, *pp_targetpath
);
975 *pp_targetpath
= cli_dfs_make_full_path(ctx
, *targetcli
, dfs_path
);
981 /********************************************************************
982 ********************************************************************/
984 static bool cli_check_msdfs_proxy(TALLOC_CTX
*ctx
,
985 struct cli_state
*cli
,
986 const char *sharename
,
990 const char *username
,
991 const char *password
,
994 CLIENT_DFS_REFERRAL
*refs
= NULL
;
997 char *fullpath
= NULL
;
1000 char *newextrapath
= NULL
;
1002 if (!cli
|| !sharename
) {
1008 /* special case. never check for a referral on the IPC$ share */
1010 if (strequal(sharename
, "IPC$")) {
1014 /* send a trans2_query_path_info to check for a referral */
1016 fullpath
= talloc_asprintf(ctx
, "\\%s\\%s", cli
->desthost
, sharename
);
1021 /* check for the referral */
1023 if (!cli_send_tconX(cli
, "IPC$", "IPC", NULL
, 0)) {
1027 if (force_encrypt
) {
1028 NTSTATUS status
= cli_cm_force_encryption(cli
,
1033 if (!NT_STATUS_IS_OK(status
)) {
1038 res
= cli_dfs_get_referral(ctx
, cli
, fullpath
, &refs
, &num_refs
, &consumed
);
1040 if (!cli_tdis(cli
)) {
1046 if (!res
|| !num_refs
) {
1050 if (!refs
[0].dfspath
) {
1054 split_dfs_path(ctx
, refs
[0].dfspath
, pp_newserver
,
1055 pp_newshare
, &newextrapath
);
1057 if ((*pp_newserver
== NULL
) || (*pp_newshare
== NULL
)) {
1061 /* check that this is not a self-referral */
1063 if (strequal(cli
->desthost
, *pp_newserver
) &&
1064 strequal(sharename
, *pp_newshare
)) {