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 2007-2009
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 "libsmb/clirap.h"
26 #include "libsmb/nmblib.h"
28 /********************************************************************
31 DFS paths are *always* of the form \server\share\<pathname> (the \ characters
32 are not C escaped here).
34 - but if we're using POSIX paths then <pathname> may contain
35 '/' separators, not '\\' separators. So cope with '\\' or '/'
36 as a separator when looking at the pathname part.... JRA.
37 ********************************************************************/
39 /********************************************************************
40 Ensure a connection is encrypted.
41 ********************************************************************/
43 NTSTATUS
cli_cm_force_encryption(struct cli_state
*c
,
47 const char *sharename
)
49 NTSTATUS status
= cli_force_encryption(c
,
54 if (NT_STATUS_EQUAL(status
,NT_STATUS_NOT_SUPPORTED
)) {
55 d_printf("Encryption required and "
56 "server that doesn't support "
57 "UNIX extensions - failing connect\n");
58 } else if (NT_STATUS_EQUAL(status
,NT_STATUS_UNKNOWN_REVISION
)) {
59 d_printf("Encryption required and "
60 "can't get UNIX CIFS extensions "
61 "version from server.\n");
62 } else if (NT_STATUS_EQUAL(status
,NT_STATUS_UNSUPPORTED_COMPRESSION
)) {
63 d_printf("Encryption required and "
64 "share %s doesn't support "
65 "encryption.\n", sharename
);
66 } else if (!NT_STATUS_IS_OK(status
)) {
67 d_printf("Encryption required and "
68 "setup failed with error %s.\n",
75 /********************************************************************
76 Return a connection to a server.
77 ********************************************************************/
79 static struct cli_state
*do_connect(TALLOC_CTX
*ctx
,
82 const struct user_auth_info
*auth_info
,
89 struct cli_state
*c
= NULL
;
90 struct nmb_name called
, calling
;
91 const char *called_str
;
93 struct sockaddr_storage ss
;
96 char *newserver
, *newshare
;
101 /* make a copy so we don't modify the global string 'service' */
102 servicename
= talloc_strdup(ctx
,share
);
106 sharename
= servicename
;
107 if (*sharename
== '\\') {
109 called_str
= sharename
;
110 if (server
== NULL
) {
113 sharename
= strchr_m(sharename
,'\\');
127 make_nmb_name(&calling
, global_myname(), 0x0);
128 make_nmb_name(&called
, called_str
, name_type
);
133 /* have to open a new connection */
134 c
= cli_initialise_ex(get_cmdline_auth_info_signing_state(auth_info
));
136 d_printf("Connection to %s failed\n", server_n
);
140 cli_set_port(c
, port
);
143 status
= cli_connect(c
, server_n
, &ss
);
144 if (!NT_STATUS_IS_OK(status
)) {
145 d_printf("Connection to %s failed (Error %s)\n",
152 if (max_protocol
== 0) {
153 max_protocol
= PROTOCOL_NT1
;
155 c
->protocol
= max_protocol
;
156 c
->use_kerberos
= get_cmdline_auth_info_use_kerberos(auth_info
);
157 c
->fallback_after_kerberos
=
158 get_cmdline_auth_info_fallback_after_kerberos(auth_info
);
159 c
->use_ccache
= get_cmdline_auth_info_use_ccache(auth_info
);
161 if (!cli_session_request(c
, &calling
, &called
)) {
163 d_printf("session request to %s failed (%s)\n",
164 called
.name
, cli_errstr(c
));
167 if ((p
=strchr_m(called
.name
, '.'))) {
171 if (strcmp(called
.name
, "*SMBSERVER")) {
172 make_nmb_name(&called
, "*SMBSERVER", 0x20);
178 DEBUG(4,(" session request ok\n"));
180 status
= cli_negprot(c
);
182 if (!NT_STATUS_IS_OK(status
)) {
183 d_printf("protocol negotiation failed: %s\n",
189 username
= get_cmdline_auth_info_username(auth_info
);
190 password
= get_cmdline_auth_info_password(auth_info
);
192 if (!NT_STATUS_IS_OK(cli_session_setup(c
, username
,
193 password
, strlen(password
),
194 password
, strlen(password
),
196 /* If a password was not supplied then
197 * try again with a null username. */
198 if (password
[0] || !username
[0] ||
199 get_cmdline_auth_info_use_kerberos(auth_info
) ||
200 !NT_STATUS_IS_OK(cli_session_setup(c
, "",
204 d_printf("session setup failed: %s\n", cli_errstr(c
));
205 if (NT_STATUS_V(cli_nt_error(c
)) ==
206 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED
))
207 d_printf("did you forget to run kinit?\n");
211 d_printf("Anonymous login successful\n");
212 status
= cli_init_creds(c
, "", lp_workgroup(), "");
214 status
= cli_init_creds(c
, username
, lp_workgroup(), password
);
217 if (!NT_STATUS_IS_OK(status
)) {
218 DEBUG(10,("cli_init_creds() failed: %s\n", nt_errstr(status
)));
223 if ( show_sessetup
) {
224 if (*c
->server_domain
) {
225 DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
226 c
->server_domain
,c
->server_os
,c
->server_type
));
227 } else if (*c
->server_os
|| *c
->server_type
) {
228 DEBUG(0,("OS=[%s] Server=[%s]\n",
229 c
->server_os
,c
->server_type
));
232 DEBUG(4,(" session setup ok\n"));
234 /* here's the fun part....to support 'msdfs proxy' shares
235 (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
236 here before trying to connect to the original share.
237 cli_check_msdfs_proxy() will fail if it is a normal share. */
239 if ((c
->capabilities
& CAP_DFS
) &&
240 cli_check_msdfs_proxy(ctx
, c
, sharename
,
241 &newserver
, &newshare
,
247 return do_connect(ctx
, newserver
,
248 newshare
, auth_info
, false,
249 force_encrypt
, max_protocol
,
253 /* must be a normal share */
255 status
= cli_tcon_andx(c
, sharename
, "?????",
256 password
, strlen(password
)+1);
257 if (!NT_STATUS_IS_OK(status
)) {
258 d_printf("tree connect failed: %s\n", nt_errstr(status
));
264 status
= cli_cm_force_encryption(c
,
269 if (!NT_STATUS_IS_OK(status
)) {
275 DEBUG(4,(" tconx ok\n"));
279 /****************************************************************************
280 ****************************************************************************/
282 static void cli_set_mntpoint(struct cli_state
*cli
, const char *mnt
)
284 char *name
= clean_name(NULL
, mnt
);
288 TALLOC_FREE(cli
->dfs_mountpoint
);
289 cli
->dfs_mountpoint
= talloc_strdup(cli
, name
);
293 /********************************************************************
294 Add a new connection to the list.
295 referring_cli == NULL means a new initial connection.
296 ********************************************************************/
298 static struct cli_state
*cli_cm_connect(TALLOC_CTX
*ctx
,
299 struct cli_state
*referring_cli
,
302 const struct user_auth_info
*auth_info
,
309 struct cli_state
*cli
;
311 cli
= do_connect(ctx
, server
, share
,
313 show_hdr
, force_encrypt
, max_protocol
,
320 /* Enter into the list. */
322 DLIST_ADD_END(referring_cli
, cli
, struct cli_state
*);
325 if (referring_cli
&& referring_cli
->requested_posix_capabilities
) {
327 uint32 caplow
, caphigh
;
329 status
= cli_unix_extensions_version(cli
, &major
, &minor
,
331 if (NT_STATUS_IS_OK(status
)) {
332 cli_set_unix_extensions_capabilities(cli
,
341 /********************************************************************
342 Return a connection to a server on a particular share.
343 ********************************************************************/
345 static struct cli_state
*cli_cm_find(struct cli_state
*cli
,
355 /* Search to the start of the list. */
356 for (p
= cli
; p
; p
= DLIST_PREV(p
)) {
357 if (strequal(server
, p
->desthost
) &&
358 strequal(share
,p
->share
)) {
363 /* Search to the end of the list. */
364 for (p
= cli
->next
; p
; p
= p
->next
) {
365 if (strequal(server
, p
->desthost
) &&
366 strequal(share
,p
->share
)) {
374 /****************************************************************************
375 Open a client connection to a \\server\share.
376 ****************************************************************************/
378 struct cli_state
*cli_cm_open(TALLOC_CTX
*ctx
,
379 struct cli_state
*referring_cli
,
382 const struct user_auth_info
*auth_info
,
389 /* Try to reuse an existing connection in this list. */
390 struct cli_state
*c
= cli_cm_find(referring_cli
, server
, share
);
396 if (auth_info
== NULL
) {
397 /* Can't do a new connection
398 * without auth info. */
399 d_printf("cli_cm_open() Unable to open connection [\\%s\\%s] "
400 "without auth info\n",
405 return cli_cm_connect(ctx
,
417 /****************************************************************************
418 ****************************************************************************/
420 void cli_cm_display(const struct cli_state
*cli
)
424 for (i
=0; cli
; cli
= cli
->next
,i
++ ) {
425 d_printf("%d:\tserver=%s, share=%s\n",
426 i
, cli
->desthost
, cli
->share
);
430 /****************************************************************************
431 ****************************************************************************/
433 /****************************************************************************
434 ****************************************************************************/
437 void cli_cm_set_credentials(struct user_auth_info
*auth_info
)
439 SAFE_FREE(cm_creds
.username
);
440 cm_creds
.username
= SMB_STRDUP(get_cmdline_auth_info_username(
443 if (get_cmdline_auth_info_got_pass(auth_info
)) {
444 cm_set_password(get_cmdline_auth_info_password(auth_info
));
447 cm_creds
.use_kerberos
= get_cmdline_auth_info_use_kerberos(auth_info
);
448 cm_creds
.fallback_after_kerberos
= false;
449 cm_creds
.signing_state
= get_cmdline_auth_info_signing_state(auth_info
);
453 /**********************************************************************
454 split a dfs path into the server, share name, and extrapath components
455 **********************************************************************/
457 static bool split_dfs_path(TALLOC_CTX
*ctx
,
458 const char *nodepath
,
468 *pp_extrapath
= NULL
;
470 path
= talloc_strdup(ctx
, nodepath
);
475 if ( path
[0] != '\\' ) {
479 p
= strchr_m( path
+ 1, '\\' );
487 /* Look for any extra/deep path */
488 q
= strchr_m(p
, '\\');
492 *pp_extrapath
= talloc_strdup(ctx
, q
);
494 *pp_extrapath
= talloc_strdup(ctx
, "");
496 if (*pp_extrapath
== NULL
) {
500 *pp_share
= talloc_strdup(ctx
, p
);
501 if (*pp_share
== NULL
) {
505 *pp_server
= talloc_strdup(ctx
, &path
[1]);
506 if (*pp_server
== NULL
) {
514 TALLOC_FREE(*pp_share
);
515 TALLOC_FREE(*pp_extrapath
);
520 /****************************************************************************
521 Return the original path truncated at the directory component before
522 the first wildcard character. Trust the caller to provide a NULL
524 ****************************************************************************/
526 static char *clean_path(TALLOC_CTX
*ctx
, const char *path
)
532 /* No absolute paths. */
533 while (IS_DIRECTORY_SEP(*path
)) {
537 path_out
= talloc_strdup(ctx
, path
);
542 p1
= strchr_m(path_out
, '*');
543 p2
= strchr_m(path_out
, '?');
555 /* Now go back to the start of this component. */
556 p1
= strrchr_m(path_out
, '/');
557 p2
= strrchr_m(path_out
, '\\');
564 /* Strip any trailing separator */
566 len
= strlen(path_out
);
567 if ( (len
> 0) && IS_DIRECTORY_SEP(path_out
[len
-1])) {
568 path_out
[len
-1] = '\0';
574 /****************************************************************************
575 ****************************************************************************/
577 static char *cli_dfs_make_full_path(TALLOC_CTX
*ctx
,
578 struct cli_state
*cli
,
581 char path_sep
= '\\';
583 /* Ensure the extrapath doesn't start with a separator. */
584 while (IS_DIRECTORY_SEP(*dir
)) {
588 if (cli
->requested_posix_capabilities
& CIFS_UNIX_POSIX_PATHNAMES_CAP
) {
591 return talloc_asprintf(ctx
, "%c%s%c%s%c%s",
600 /********************************************************************
601 check for dfs referral
602 ********************************************************************/
604 static bool cli_dfs_check_error(struct cli_state
*cli
, NTSTATUS expected
,
607 /* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
609 if (!(cli
->capabilities
& CAP_UNICODE
)) {
612 if (!(cli
->capabilities
& CAP_STATUS32
)) {
615 if (NT_STATUS_EQUAL(status
, expected
)) {
621 /********************************************************************
622 Get the dfs referral link.
623 ********************************************************************/
625 NTSTATUS
cli_dfs_get_referral(TALLOC_CTX
*ctx
,
626 struct cli_state
*cli
,
628 struct client_dfs_referral
**refs
,
632 unsigned int data_len
= 0;
633 unsigned int param_len
= 0;
635 uint8_t *param
= NULL
;
636 uint8_t *rdata
= NULL
;
639 size_t pathlen
= 2*(strlen(path
)+1);
640 smb_ucs2_t
*path_ucs
;
641 char *consumed_path
= NULL
;
642 uint16_t consumed_ucs
;
643 uint16 num_referrals
;
644 struct client_dfs_referral
*referrals
= NULL
;
650 SSVAL(setup
, 0, TRANSACT2_GET_DFS_REFERRAL
);
652 param
= SMB_MALLOC_ARRAY(uint8_t, 2+pathlen
+2);
654 status
= NT_STATUS_NO_MEMORY
;
657 SSVAL(param
, 0, 0x03); /* max referral level */
658 p
= (char *)(¶m
[2]);
660 path_ucs
= (smb_ucs2_t
*)p
;
661 p
+= clistr_push(cli
, p
, path
, pathlen
, STR_TERMINATE
);
662 param_len
= PTR_DIFF(p
, param
);
664 status
= cli_trans(talloc_tos(), cli
, SMBtrans2
,
668 NULL
, 0, cli
->max_xmit
,
670 NULL
, 0, NULL
, /* rsetup */
672 &rdata
, 4, &data_len
);
673 if (!NT_STATUS_IS_OK(status
)) {
680 endp
= (char *)rdata
+ data_len
;
682 consumed_ucs
= SVAL(rdata
, 0);
683 num_referrals
= SVAL(rdata
, 2);
685 /* consumed_ucs is the number of bytes
686 * of the UCS2 path consumed not counting any
687 * terminating null. We need to convert
688 * back to unix charset and count again
689 * to get the number of bytes consumed from
690 * the incoming path. */
692 if (pull_string_talloc(talloc_tos(),
701 if (consumed_path
== NULL
) {
704 *consumed
= strlen(consumed_path
);
706 if (num_referrals
!= 0) {
712 referrals
= talloc_array(ctx
, struct client_dfs_referral
,
718 /* start at the referrals array */
721 for (i
=0; i
<num_referrals
&& p
< endp
; i
++) {
725 ref_version
= SVAL(p
, 0);
726 ref_size
= SVAL(p
, 2);
727 node_offset
= SVAL(p
, 16);
729 if (ref_version
!= 3) {
734 referrals
[i
].proximity
= SVAL(p
, 8);
735 referrals
[i
].ttl
= SVAL(p
, 10);
737 if (p
+ node_offset
> endp
) {
740 clistr_pull_talloc(ctx
, cli
->inbuf
,
741 SVAL(cli
->inbuf
, smb_flg2
),
742 &referrals
[i
].dfspath
,
744 cli
->bufsize
- ((p
+node_offset
)-cli
->inbuf
),
745 STR_TERMINATE
|STR_UNICODE
);
747 if (!referrals
[i
].dfspath
) {
752 if (i
< num_referrals
) {
757 *num_refs
= num_referrals
;
762 TALLOC_FREE(consumed_path
);
768 /********************************************************************
769 ********************************************************************/
771 bool cli_resolve_path(TALLOC_CTX
*ctx
,
773 const struct user_auth_info
*dfs_auth_info
,
774 struct cli_state
*rootcli
,
776 struct cli_state
**targetcli
,
777 char **pp_targetpath
)
779 struct client_dfs_referral
*refs
= NULL
;
782 struct cli_state
*cli_ipc
= NULL
;
783 char *dfs_path
= NULL
;
784 char *cleanpath
= NULL
;
785 char *extrapath
= NULL
;
789 struct cli_state
*newcli
= NULL
;
790 char *newpath
= NULL
;
791 char *newmount
= NULL
;
793 SMB_STRUCT_STAT sbuf
;
797 if ( !rootcli
|| !path
|| !targetcli
) {
801 /* Don't do anything if this is not a DFS root. */
803 if ( !rootcli
->dfsroot
) {
804 *targetcli
= rootcli
;
805 *pp_targetpath
= talloc_strdup(ctx
, path
);
806 if (!*pp_targetpath
) {
814 /* Send a trans2_query_path_info to check for a referral. */
816 cleanpath
= clean_path(ctx
, path
);
821 dfs_path
= cli_dfs_make_full_path(ctx
, rootcli
, cleanpath
);
826 status
= cli_qpathinfo_basic( rootcli
, dfs_path
, &sbuf
, &attributes
);
827 if (NT_STATUS_IS_OK(status
)) {
828 /* This is an ordinary path, just return it. */
829 *targetcli
= rootcli
;
830 *pp_targetpath
= talloc_strdup(ctx
, path
);
831 if (!*pp_targetpath
) {
837 /* Special case where client asked for a path that does not exist */
839 if (cli_dfs_check_error(rootcli
, NT_STATUS_OBJECT_NAME_NOT_FOUND
,
841 *targetcli
= rootcli
;
842 *pp_targetpath
= talloc_strdup(ctx
, path
);
843 if (!*pp_targetpath
) {
849 /* We got an error, check for DFS referral. */
851 if (!cli_dfs_check_error(rootcli
, NT_STATUS_PATH_NOT_COVERED
,
856 /* Check for the referral. */
858 if (!(cli_ipc
= cli_cm_open(ctx
,
864 (rootcli
->trans_enc_state
!= NULL
),
871 status
= cli_dfs_get_referral(ctx
, cli_ipc
, dfs_path
, &refs
,
872 &num_refs
, &consumed
);
873 if (!NT_STATUS_IS_OK(status
) || !num_refs
) {
877 /* Just store the first referral for now. */
879 if (!refs
[0].dfspath
) {
882 if (!split_dfs_path(ctx
, refs
[0].dfspath
, &server
, &share
,
887 /* Make sure to recreate the original string including any wildcards. */
889 dfs_path
= cli_dfs_make_full_path(ctx
, rootcli
, path
);
893 pathlen
= strlen(dfs_path
);
894 consumed
= MIN(pathlen
, consumed
);
895 *pp_targetpath
= talloc_strdup(ctx
, &dfs_path
[consumed
]);
896 if (!*pp_targetpath
) {
899 dfs_path
[consumed
] = '\0';
902 * *pp_targetpath is now the unconsumed part of the path.
903 * dfs_path is now the consumed part of the path
904 * (in \server\share\path format).
907 /* Open the connection to the target server & share */
908 if ((*targetcli
= cli_cm_open(ctx
, rootcli
,
913 (rootcli
->trans_enc_state
!= NULL
),
917 d_printf("Unable to follow dfs referral [\\%s\\%s]\n",
922 if (extrapath
&& strlen(extrapath
) > 0) {
923 /* EMC Celerra NAS version 5.6.50 (at least) doesn't appear to */
924 /* put the trailing \ on the path, so to be save we put one in if needed */
925 if (extrapath
[strlen(extrapath
)-1] != '\\' && **pp_targetpath
!= '\\') {
926 *pp_targetpath
= talloc_asprintf(ctx
,
931 *pp_targetpath
= talloc_asprintf(ctx
,
936 if (!*pp_targetpath
) {
941 /* parse out the consumed mount path */
942 /* trim off the \server\share\ */
946 if (*ppath
!= '\\') {
947 d_printf("cli_resolve_path: "
948 "dfs_path (%s) not in correct format.\n",
953 ppath
++; /* Now pointing at start of server name. */
955 if ((ppath
= strchr_m( dfs_path
, '\\' )) == NULL
) {
959 ppath
++; /* Now pointing at start of share name. */
961 if ((ppath
= strchr_m( ppath
+1, '\\' )) == NULL
) {
965 ppath
++; /* Now pointing at path component. */
967 newmount
= talloc_asprintf(ctx
, "%s\\%s", mountpt
, ppath
);
972 cli_set_mntpoint(*targetcli
, newmount
);
974 /* Check for another dfs referral, note that we are not
975 checking for loops here. */
977 if (!strequal(*pp_targetpath
, "\\") && !strequal(*pp_targetpath
, "/")) {
978 if (cli_resolve_path(ctx
,
986 * When cli_resolve_path returns true here it's always
987 * returning the complete path in newpath, so we're done
991 *pp_targetpath
= newpath
;
998 /* If returning true ensure we return a dfs root full path. */
999 if ((*targetcli
)->dfsroot
) {
1000 dfs_path
= talloc_strdup(ctx
, *pp_targetpath
);
1004 *pp_targetpath
= cli_dfs_make_full_path(ctx
, *targetcli
, dfs_path
);
1010 /********************************************************************
1011 ********************************************************************/
1013 bool cli_check_msdfs_proxy(TALLOC_CTX
*ctx
,
1014 struct cli_state
*cli
,
1015 const char *sharename
,
1016 char **pp_newserver
,
1019 const char *username
,
1020 const char *password
,
1023 struct client_dfs_referral
*refs
= NULL
;
1024 size_t num_refs
= 0;
1025 size_t consumed
= 0;
1026 char *fullpath
= NULL
;
1029 char *newextrapath
= NULL
;
1032 if (!cli
|| !sharename
) {
1038 /* special case. never check for a referral on the IPC$ share */
1040 if (strequal(sharename
, "IPC$")) {
1044 /* send a trans2_query_path_info to check for a referral */
1046 fullpath
= talloc_asprintf(ctx
, "\\%s\\%s", cli
->desthost
, sharename
);
1051 /* check for the referral */
1053 if (!NT_STATUS_IS_OK(cli_tcon_andx(cli
, "IPC$", "IPC", NULL
, 0))) {
1057 if (force_encrypt
) {
1058 status
= cli_cm_force_encryption(cli
,
1063 if (!NT_STATUS_IS_OK(status
)) {
1068 status
= cli_dfs_get_referral(ctx
, cli
, fullpath
, &refs
,
1069 &num_refs
, &consumed
);
1070 res
= NT_STATUS_IS_OK(status
);
1072 status
= cli_tdis(cli
);
1073 if (!NT_STATUS_IS_OK(status
)) {
1079 if (!res
|| !num_refs
) {
1083 if (!refs
[0].dfspath
) {
1087 if (!split_dfs_path(ctx
, refs
[0].dfspath
, pp_newserver
,
1088 pp_newshare
, &newextrapath
)) {
1092 /* check that this is not a self-referral */
1094 if (strequal(cli
->desthost
, *pp_newserver
) &&
1095 strequal(sharename
, *pp_newshare
)) {