2 Unix SMB/CIFS implementation.
3 service (connection) opening and closing
4 Copyright (C) Andrew Tridgell 1992-1998
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/>.
21 #include "system/filesys.h"
22 #include "system/passwd.h" /* uid_wrapper */
23 #include "../lib/tsocket/tsocket.h"
24 #include "smbd/smbd.h"
25 #include "smbd/globals.h"
26 #include "../librpc/gen_ndr/netlogon.h"
27 #include "../libcli/security/security.h"
28 #include "printing/pcap.h"
29 #include "passdb/lookup_sid.h"
31 #include "lib/param/loadparm.h"
34 static bool canonicalize_connect_path(connection_struct
*conn
)
37 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
);
41 ret
= set_conn_connectpath(conn
,resolved_name
);
42 SAFE_FREE(resolved_name
);
46 /****************************************************************************
47 Ensure when setting connectpath it is a canonicalized (no ./ // or ../)
48 absolute path stating in / and not ending in /.
49 Observent people will notice a similarity between this and check_path_syntax :-).
50 ****************************************************************************/
52 bool set_conn_connectpath(connection_struct
*conn
, const char *connectpath
)
56 const char *s
= connectpath
;
57 bool start_of_name_component
= true;
59 if (connectpath
== NULL
|| connectpath
[0] == '\0') {
63 /* Allocate for strlen + '\0' + possible leading '/' */
64 destname
= (char *)talloc_size(conn
, strlen(connectpath
) + 2);
70 *d
++ = '/'; /* Always start with root. */
74 /* Eat multiple '/' */
78 if ((d
> destname
+ 1) && (*s
!= '\0')) {
81 start_of_name_component
= True
;
85 if (start_of_name_component
) {
86 if ((s
[0] == '.') && (s
[1] == '.') && (s
[2] == '/' || s
[2] == '\0')) {
87 /* Uh oh - "/../" or "/..\0" ! */
89 /* Go past the ../ or .. */
93 s
+= 2; /* Go past the .. */
96 /* If we just added a '/' - delete it */
97 if ((d
> destname
) && (*(d
-1) == '/')) {
102 /* Are we at the start ? Can't go back further if so. */
104 *d
++ = '/'; /* Can't delete root */
107 /* Go back one level... */
108 /* Decrement d first as d points to the *next* char to write into. */
109 for (d
--; d
> destname
; d
--) {
114 /* We're still at the start of a name component, just the previous one. */
116 } else if ((s
[0] == '.') && ((s
[1] == '\0') || s
[1] == '/')) {
117 /* Component of pathname can't be "." only - skip the '.' . */
131 /* Get the size of the next MB character. */
132 next_codepoint(s
,&siz
);
153 start_of_name_component
= false;
157 /* And must not end in '/' */
158 if (d
> destname
+ 1 && (*(d
-1) == '/')) {
162 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
163 lp_servicename(talloc_tos(), SNUM(conn
)), destname
));
165 talloc_free(conn
->connectpath
);
166 conn
->connectpath
= destname
;
167 /* Ensure conn->cwd is initialized - start as conn->connectpath. */
168 TALLOC_FREE(conn
->cwd
);
169 conn
->cwd
= talloc_strdup(conn
, conn
->connectpath
);
176 /****************************************************************************
177 Load parameters specific to a connection/service.
178 ****************************************************************************/
180 bool set_current_service(connection_struct
*conn
, uint16 flags
, bool do_chdir
)
189 conn
->lastused_count
++;
194 vfs_ChDir(conn
,conn
->connectpath
) != 0 &&
195 vfs_ChDir(conn
,conn
->origpath
) != 0) {
196 DEBUG(((errno
!=EACCES
)?0:3),("chdir (%s) failed, reason: %s\n",
197 conn
->connectpath
, strerror(errno
)));
201 if ((conn
== last_conn
) && (last_flags
== flags
)) {
208 /* Obey the client case sensitivity requests - only for clients that support it. */
209 switch (lp_casesensitive(snum
)) {
212 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
213 enum remote_arch_types ra_type
= get_remote_arch();
214 if ((ra_type
!= RA_SAMBA
) && (ra_type
!= RA_CIFSFS
)) {
215 /* Client can't support per-packet case sensitive pathnames. */
216 conn
->case_sensitive
= False
;
218 conn
->case_sensitive
= !(flags
& FLAG_CASELESS_PATHNAMES
);
223 conn
->case_sensitive
= True
;
226 conn
->case_sensitive
= False
;
232 /****************************************************************************
233 do some basic sainity checks on the share.
234 This function modifies dev, ecode.
235 ****************************************************************************/
237 static NTSTATUS
share_sanity_checks(const struct tsocket_address
*remote_address
,
244 raddr
= tsocket_address_inet_addr_string(remote_address
,
247 return NT_STATUS_NO_MEMORY
;
250 if (!lp_snum_ok(snum
) ||
251 !allow_access(lp_hostsdeny(snum
), lp_hostsallow(snum
),
253 return NT_STATUS_ACCESS_DENIED
;
256 if (dev
[0] == '?' || !dev
[0]) {
257 if (lp_print_ok(snum
)) {
258 fstrcpy(dev
,"LPT1:");
259 } else if (strequal(lp_fstype(talloc_tos(), snum
), "IPC")) {
266 if (!strupper_m(dev
)) {
267 DEBUG(2,("strupper_m %s failed\n", dev
));
268 return NT_STATUS_INVALID_PARAMETER
;
271 if (lp_print_ok(snum
)) {
272 if (!strequal(dev
, "LPT1:")) {
273 return NT_STATUS_BAD_DEVICE_TYPE
;
275 } else if (strequal(lp_fstype(talloc_tos(), snum
), "IPC")) {
276 if (!strequal(dev
, "IPC")) {
277 return NT_STATUS_BAD_DEVICE_TYPE
;
279 } else if (!strequal(dev
, "A:")) {
280 return NT_STATUS_BAD_DEVICE_TYPE
;
283 /* Behave as a printer if we are supposed to */
284 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
285 fstrcpy(dev
, "LPT1:");
292 * Go through lookup_name etc to find the force'd group.
294 * Create a new token from src_token, replacing the primary group sid with the
298 static NTSTATUS
find_forced_group(bool force_user
,
299 int snum
, const char *username
,
300 struct dom_sid
*pgroup_sid
,
303 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
304 TALLOC_CTX
*frame
= talloc_stackframe();
305 struct dom_sid group_sid
;
306 enum lsa_SidType type
;
308 bool user_must_be_member
= False
;
311 groupname
= lp_force_group(talloc_tos(), snum
);
312 if (groupname
== NULL
) {
313 DEBUG(1, ("talloc_strdup failed\n"));
314 result
= NT_STATUS_NO_MEMORY
;
318 if (groupname
[0] == '+') {
319 user_must_be_member
= True
;
323 groupname
= talloc_string_sub(talloc_tos(), groupname
,
324 "%S", lp_servicename(talloc_tos(), snum
));
325 if (groupname
== NULL
) {
326 DEBUG(1, ("talloc_string_sub failed\n"));
327 result
= NT_STATUS_NO_MEMORY
;
331 if (!lookup_name_smbconf(talloc_tos(), groupname
,
332 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
333 NULL
, NULL
, &group_sid
, &type
)) {
334 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
339 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
340 (type
!= SID_NAME_WKN_GRP
)) {
341 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
342 sid_type_lookup(type
)));
346 if (!sid_to_gid(&group_sid
, &gid
)) {
347 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
348 sid_string_dbg(&group_sid
), groupname
));
353 * If the user has been forced and the forced group starts with a '+',
354 * then we only set the group to be the forced group if the forced
355 * user is a member of that group. Otherwise, the meaning of the '+'
359 if (force_user
&& user_must_be_member
) {
360 if (user_in_group_sid(username
, &group_sid
)) {
361 sid_copy(pgroup_sid
, &group_sid
);
363 DEBUG(3,("Forced group %s for member %s\n",
364 groupname
, username
));
366 DEBUG(0,("find_forced_group: forced user %s is not a member "
367 "of forced group %s. Disallowing access.\n",
368 username
, groupname
));
369 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
373 sid_copy(pgroup_sid
, &group_sid
);
375 DEBUG(3,("Forced group %s\n", groupname
));
378 result
= NT_STATUS_OK
;
384 /****************************************************************************
385 Create an auth_session_info structure for a connection_struct
386 ****************************************************************************/
388 static NTSTATUS
create_connection_session_info(struct smbd_server_connection
*sconn
,
389 TALLOC_CTX
*mem_ctx
, int snum
,
390 struct auth_session_info
*session_info
,
391 struct auth_session_info
**presult
)
393 struct auth_session_info
*result
;
395 if (lp_guest_only(snum
)) {
396 return make_session_info_guest(mem_ctx
, presult
);
400 * This is the normal security != share case where we have a
401 * valid vuid from the session setup. */
403 if (security_session_user_level(session_info
, NULL
) < SECURITY_USER
) {
404 if (!lp_guest_ok(snum
)) {
405 DEBUG(2, ("guest user (from session setup) "
406 "not permitted to access this share "
407 "(%s)\n", lp_servicename(talloc_tos(), snum
)));
408 return NT_STATUS_ACCESS_DENIED
;
411 if (!user_ok_token(session_info
->unix_info
->unix_name
,
412 session_info
->info
->domain_name
,
413 session_info
->security_token
, snum
)) {
414 DEBUG(2, ("user '%s' (from session setup) not "
415 "permitted to access this share "
417 session_info
->unix_info
->unix_name
,
418 lp_servicename(talloc_tos(), snum
)));
419 return NT_STATUS_ACCESS_DENIED
;
423 result
= copy_session_info(mem_ctx
, session_info
);
424 if (result
== NULL
) {
425 return NT_STATUS_NO_MEMORY
;
432 /****************************************************************************
433 set relavent user and group settings corresponding to force user/group
434 configuration for the given snum.
435 ****************************************************************************/
437 NTSTATUS
set_conn_force_user_group(connection_struct
*conn
, int snum
)
441 if (*lp_force_user(talloc_tos(), snum
)) {
444 * Replace conn->session_info with a completely faked up one
445 * from the username we are forced into :-)
449 char *sanitized_username
;
450 struct auth_session_info
*forced_serverinfo
;
453 fuser
= talloc_string_sub(conn
, lp_force_user(talloc_tos(), snum
), "%S",
454 lp_const_servicename(snum
));
456 return NT_STATUS_NO_MEMORY
;
459 guest
= security_session_user_level(conn
->session_info
, NULL
) < SECURITY_USER
;
461 status
= make_session_info_from_username(
465 if (!NT_STATUS_IS_OK(status
)) {
469 /* We don't want to replace the original sanitized_username
470 as it is the original user given in the connect attempt.
471 This is used in '%U' substitutions. */
472 sanitized_username
= discard_const_p(char,
473 forced_serverinfo
->unix_info
->sanitized_username
);
474 TALLOC_FREE(sanitized_username
);
475 forced_serverinfo
->unix_info
->sanitized_username
=
476 talloc_move(forced_serverinfo
->unix_info
,
477 &conn
->session_info
->unix_info
->sanitized_username
);
479 TALLOC_FREE(conn
->session_info
);
480 conn
->session_info
= forced_serverinfo
;
482 conn
->force_user
= true;
483 DEBUG(3,("Forced user %s\n", fuser
));
487 * If force group is true, then override
488 * any groupid stored for the connecting user.
491 if (*lp_force_group(talloc_tos(), snum
)) {
493 status
= find_forced_group(
494 conn
->force_user
, snum
, conn
->session_info
->unix_info
->unix_name
,
495 &conn
->session_info
->security_token
->sids
[1],
496 &conn
->session_info
->unix_token
->gid
);
498 if (!NT_STATUS_IS_OK(status
)) {
503 * We need to cache this gid, to use within
504 * change_to_user() separately from the conn->session_info
505 * struct. We only use conn->session_info directly if
506 * "force_user" was set.
508 conn
->force_group_gid
= conn
->session_info
->unix_token
->gid
;
514 /****************************************************************************
515 Setup the share access mask for a connection.
516 ****************************************************************************/
518 uint32_t create_share_access_mask(int snum
,
520 const struct security_token
*token
)
522 uint32_t share_access
= 0;
524 share_access_check(token
,
525 lp_servicename(talloc_tos(), snum
),
526 MAXIMUM_ALLOWED_ACCESS
,
529 if (readonly_share
) {
531 ~(SEC_FILE_WRITE_DATA
| SEC_FILE_APPEND_DATA
|
532 SEC_FILE_WRITE_EA
| SEC_FILE_WRITE_ATTRIBUTE
|
533 SEC_DIR_DELETE_CHILD
);
536 if (security_token_has_privilege(token
, SEC_PRIV_SECURITY
)) {
537 share_access
|= SEC_FLAG_SYSTEM_SECURITY
;
539 if (security_token_has_privilege(token
, SEC_PRIV_RESTORE
)) {
540 share_access
|= (SEC_RIGHTS_PRIV_RESTORE
);
542 if (security_token_has_privilege(token
, SEC_PRIV_BACKUP
)) {
543 share_access
|= (SEC_RIGHTS_PRIV_BACKUP
);
545 if (security_token_has_privilege(token
, SEC_PRIV_TAKE_OWNERSHIP
)) {
546 share_access
|= (SEC_STD_WRITE_OWNER
);
552 /****************************************************************************
553 Make a connection, given the snum to connect to, and the vuser of the
554 connecting user if appropriate.
555 ****************************************************************************/
557 static NTSTATUS
make_connection_snum(struct smbd_server_connection
*sconn
,
558 connection_struct
*conn
,
559 int snum
, struct user_struct
*vuser
,
562 struct smb_filename
*smb_fname_cpath
= NULL
;
565 bool on_err_call_dis_hook
= false;
572 status
= share_sanity_checks(sconn
->remote_address
,
573 sconn
->remote_hostname
,
576 if (NT_STATUS_IS_ERR(status
)) {
580 conn
->params
->service
= snum
;
582 status
= create_connection_session_info(sconn
,
583 conn
, snum
, vuser
->session_info
,
584 &conn
->session_info
);
586 if (!NT_STATUS_IS_OK(status
)) {
587 DEBUG(1, ("create_connection_session_info failed: %s\n",
592 if (lp_guest_only(snum
)) {
593 conn
->force_user
= true;
596 conn
->num_files_open
= 0;
597 conn
->lastused
= conn
->lastused_count
= time(NULL
);
598 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
599 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
600 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
602 /* Case options for the share. */
603 if (lp_casesensitive(snum
) == Auto
) {
604 /* We will be setting this per packet. Set to be case
605 * insensitive for now. */
606 conn
->case_sensitive
= False
;
608 conn
->case_sensitive
= (bool)lp_casesensitive(snum
);
611 conn
->case_preserve
= lp_preservecase(snum
);
612 conn
->short_case_preserve
= lp_shortpreservecase(snum
);
614 conn
->encrypt_level
= lp_smb_encrypt(snum
);
616 conn
->veto_list
= NULL
;
617 conn
->hide_list
= NULL
;
618 conn
->veto_oplock_list
= NULL
;
619 conn
->aio_write_behind_list
= NULL
;
621 conn
->read_only
= lp_readonly(SNUM(conn
));
623 status
= set_conn_force_user_group(conn
, snum
);
624 if (!NT_STATUS_IS_OK(status
)) {
628 conn
->vuid
= vuser
->vuid
;
631 char *s
= talloc_sub_advanced(talloc_tos(),
632 lp_servicename(talloc_tos(), SNUM(conn
)),
633 conn
->session_info
->unix_info
->unix_name
,
635 conn
->session_info
->unix_token
->gid
,
636 conn
->session_info
->unix_info
->sanitized_username
,
637 conn
->session_info
->info
->domain_name
,
638 lp_pathname(talloc_tos(), snum
));
640 status
= NT_STATUS_NO_MEMORY
;
644 if (!set_conn_connectpath(conn
,s
)) {
646 status
= NT_STATUS_NO_MEMORY
;
649 DEBUG(3,("Connect path is '%s' for service [%s]\n",s
,
650 lp_servicename(talloc_tos(), snum
)));
655 * Set up the share security descripter
658 status
= check_user_share_access(conn
,
662 if (!NT_STATUS_IS_OK(status
)) {
666 /* Initialise VFS function pointers */
668 if (!smbd_vfs_init(conn
)) {
669 DEBUG(0, ("vfs_init failed for service %s\n",
670 lp_servicename(talloc_tos(), snum
)));
671 status
= NT_STATUS_BAD_NETWORK_NAME
;
675 /* ROOT Activities: */
676 /* explicitly check widelinks here so that we can correctly warn
678 widelinks_warning(snum
);
681 * Enforce the max connections parameter.
684 if ((lp_max_connections(snum
) > 0)
685 && (count_current_connections(lp_servicename(talloc_tos(), SNUM(conn
)), True
) >=
686 lp_max_connections(snum
))) {
688 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
689 lp_max_connections(snum
),
690 lp_servicename(talloc_tos(), snum
)));
691 status
= NT_STATUS_INSUFFICIENT_RESOURCES
;
695 /* Invoke VFS make connection hook - this must be the first
696 filesystem operation that we do. */
698 if (SMB_VFS_CONNECT(conn
, lp_servicename(talloc_tos(), snum
),
699 conn
->session_info
->unix_info
->unix_name
) < 0) {
700 DEBUG(0,("make_connection: VFS make connection failed!\n"));
701 status
= NT_STATUS_UNSUCCESSFUL
;
705 /* Any error exit after here needs to call the disconnect hook. */
706 on_err_call_dis_hook
= true;
708 if ((!conn
->printer
) && (!conn
->ipc
) &&
709 lp_change_notify(conn
->params
)) {
710 if (sconn
->notify_ctx
== NULL
) {
711 sconn
->notify_ctx
= notify_init(
712 sconn
, sconn
->msg_ctx
, sconn
->ev_ctx
);
714 if (sconn
->sys_notify_ctx
== NULL
) {
715 sconn
->sys_notify_ctx
= sys_notify_context_create(
716 sconn
, sconn
->ev_ctx
);
720 if (lp_kernel_oplocks(snum
)) {
721 init_kernel_oplocks(conn
->sconn
);
725 * Fix compatibility issue pointed out by Volker.
726 * We pass the conn->connectpath to the preexec
727 * scripts as a parameter, so attempt to canonicalize
728 * it here before calling the preexec scripts.
729 * We ignore errors here, as it is possible that
730 * the conn->connectpath doesn't exist yet and
731 * the preexec scripts will create them.
734 (void)canonicalize_connect_path(conn
);
736 /* Preexecs are done here as they might make the dir we are to ChDir
738 /* execute any "root preexec = " line */
739 if (*lp_rootpreexec(talloc_tos(), snum
)) {
740 char *cmd
= talloc_sub_advanced(talloc_tos(),
741 lp_servicename(talloc_tos(), SNUM(conn
)),
742 conn
->session_info
->unix_info
->unix_name
,
744 conn
->session_info
->unix_token
->gid
,
745 conn
->session_info
->unix_info
->sanitized_username
,
746 conn
->session_info
->info
->domain_name
,
747 lp_rootpreexec(talloc_tos(), snum
));
748 DEBUG(5,("cmd=%s\n",cmd
));
749 ret
= smbrun(cmd
,NULL
);
751 if (ret
!= 0 && lp_rootpreexec_close(snum
)) {
752 DEBUG(1,("root preexec gave %d - failing "
753 "connection\n", ret
));
754 status
= NT_STATUS_ACCESS_DENIED
;
759 /* USER Activites: */
760 if (!change_to_user(conn
, conn
->vuid
)) {
761 /* No point continuing if they fail the basic checks */
762 DEBUG(0,("Can't become connected user!\n"));
763 status
= NT_STATUS_LOGON_FAILURE
;
770 /* Remember that a different vuid can connect later without these
773 /* Preexecs are done here as they might make the dir we are to ChDir
776 /* execute any "preexec = " line */
777 if (*lp_preexec(talloc_tos(), snum
)) {
778 char *cmd
= talloc_sub_advanced(talloc_tos(),
779 lp_servicename(talloc_tos(), SNUM(conn
)),
780 conn
->session_info
->unix_info
->unix_name
,
782 conn
->session_info
->unix_token
->gid
,
783 conn
->session_info
->unix_info
->sanitized_username
,
784 conn
->session_info
->info
->domain_name
,
785 lp_preexec(talloc_tos(), snum
));
786 ret
= smbrun(cmd
,NULL
);
788 if (ret
!= 0 && lp_preexec_close(snum
)) {
789 DEBUG(1,("preexec gave %d - failing connection\n",
791 status
= NT_STATUS_ACCESS_DENIED
;
796 #ifdef WITH_FAKE_KASERVER
797 if (lp_afs_share(snum
)) {
803 * we've finished with the user stuff - go back to root
804 * so the SMB_VFS_STAT call will only fail on path errors,
805 * not permission problems.
807 change_to_root_user();
808 /* ROOT Activites: */
811 * If widelinks are disallowed we need to canonicalise the connect
812 * path here to ensure we don't have any symlinks in the
813 * connectpath. We will be checking all paths on this connection are
814 * below this directory. We must do this after the VFS init as we
815 * depend on the realpath() pointer in the vfs table. JRA.
817 if (!lp_widelinks(snum
)) {
818 if (!canonicalize_connect_path(conn
)) {
819 DEBUG(0, ("canonicalize_connect_path failed "
820 "for service %s, path %s\n",
821 lp_servicename(talloc_tos(), snum
),
823 status
= NT_STATUS_BAD_NETWORK_NAME
;
828 /* Add veto/hide lists */
829 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
830 set_namearray( &conn
->veto_list
,
831 lp_veto_files(talloc_tos(), snum
));
832 set_namearray( &conn
->hide_list
,
833 lp_hide_files(talloc_tos(), snum
));
834 set_namearray( &conn
->veto_oplock_list
,
835 lp_veto_oplocks(talloc_tos(), snum
));
836 set_namearray( &conn
->aio_write_behind_list
,
837 lp_aio_write_behind(talloc_tos(), snum
));
839 status
= create_synthetic_smb_fname(talloc_tos(), conn
->connectpath
,
840 NULL
, NULL
, &smb_fname_cpath
);
841 if (!NT_STATUS_IS_OK(status
)) {
845 /* win2000 does not check the permissions on the directory
846 during the tree connect, instead relying on permission
847 check during individual operations. To match this behaviour
848 I have disabled this chdir check (tridge) */
849 /* the alternative is just to check the directory exists */
851 if ((ret
= SMB_VFS_STAT(conn
, smb_fname_cpath
)) != 0 ||
852 !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
853 if (ret
== 0 && !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
854 DEBUG(0,("'%s' is not a directory, when connecting to "
855 "[%s]\n", conn
->connectpath
,
856 lp_servicename(talloc_tos(), snum
)));
858 DEBUG(0,("'%s' does not exist or permission denied "
859 "when connecting to [%s] Error was %s\n",
861 lp_servicename(talloc_tos(), snum
),
864 status
= NT_STATUS_BAD_NETWORK_NAME
;
867 conn
->base_share_dev
= smb_fname_cpath
->st
.st_ex_dev
;
869 talloc_free(conn
->origpath
);
870 conn
->origpath
= talloc_strdup(conn
, conn
->connectpath
);
872 /* Figure out the characteristics of the underlying filesystem. This
873 * assumes that all the filesystem mounted withing a share path have
874 * the same characteristics, which is likely but not guaranteed.
877 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
, &conn
->ts_res
);
880 * Print out the 'connected as' stuff here as we need
881 * to know the effective uid and gid we will be using
882 * (at least initially).
885 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
886 dbgtext( "%s (%s) ", get_remote_machine_name(),
887 tsocket_address_string(conn
->sconn
->remote_address
,
889 dbgtext( "%s", srv_is_signing_active(sconn
) ? "signed " : "");
890 dbgtext( "connect to service %s ",
891 lp_servicename(talloc_tos(), snum
) );
892 dbgtext( "initially as user %s ",
893 conn
->session_info
->unix_info
->unix_name
);
894 dbgtext( "(uid=%d, gid=%d) ", (int)effuid
, (int)effgid
);
895 dbgtext( "(pid %d)\n", (int)getpid() );
902 TALLOC_FREE(smb_fname_cpath
);
903 /* We must exit this function as root. */
904 if (geteuid() != 0) {
905 change_to_root_user();
907 if (on_err_call_dis_hook
) {
908 /* Call VFS disconnect hook */
909 SMB_VFS_DISCONNECT(conn
);
914 /****************************************************************************
915 Make a connection to a service from SMB1. Internal interface.
916 ****************************************************************************/
918 static connection_struct
*make_connection_smb1(struct smbd_server_connection
*sconn
,
920 int snum
, struct user_struct
*vuser
,
924 struct smbXsrv_tcon
*tcon
;
926 struct connection_struct
*conn
;
928 status
= smb1srv_tcon_create(sconn
->conn
, now
, &tcon
);
929 if (!NT_STATUS_IS_OK(status
)) {
930 DEBUG(0,("make_connection_smb1: Couldn't find free tcon %s.\n",
936 conn
= conn_new(sconn
);
940 DEBUG(0,("make_connection_smb1: Couldn't find free connection.\n"));
941 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
945 conn
->cnum
= tcon
->global
->tcon_wire_id
;
948 *pstatus
= make_connection_snum(sconn
,
953 if (!NT_STATUS_IS_OK(*pstatus
)) {
959 tcon
->global
->share_name
= lp_servicename(tcon
->global
, SNUM(conn
));
960 if (tcon
->global
->share_name
== NULL
) {
963 *pstatus
= NT_STATUS_NO_MEMORY
;
966 tcon
->global
->session_global_id
=
967 vuser
->session
->global
->session_global_id
;
969 tcon
->compat
= talloc_move(tcon
, &conn
);
970 tcon
->status
= NT_STATUS_OK
;
972 *pstatus
= smbXsrv_tcon_update(tcon
);
973 if (!NT_STATUS_IS_OK(*pstatus
)) {
981 /****************************************************************************
982 Make a connection to a service from SMB2. External SMB2 interface.
983 We must set cnum before claiming connection.
984 ****************************************************************************/
986 connection_struct
*make_connection_smb2(struct smbd_server_connection
*sconn
,
987 struct smbXsrv_tcon
*tcon
,
989 struct user_struct
*vuser
,
993 connection_struct
*conn
= conn_new(sconn
);
995 DEBUG(0,("make_connection_smb2: Couldn't find free connection.\n"));
996 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
1000 conn
->cnum
= tcon
->global
->tcon_wire_id
;
1003 *pstatus
= make_connection_snum(sconn
,
1008 if (!NT_STATUS_IS_OK(*pstatus
)) {
1015 /****************************************************************************
1016 Make a connection to a service. External SMB1 interface.
1019 ****************************************************************************/
1021 connection_struct
*make_connection(struct smbd_server_connection
*sconn
,
1023 const char *service_in
,
1024 const char *pdev
, uint64_t vuid
,
1028 struct user_struct
*vuser
= NULL
;
1029 char *service
= NULL
;
1035 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1037 if (!non_root_mode() && (euid
= geteuid()) != 0) {
1038 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1039 "(%u)\n", (unsigned int)euid
));
1040 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1043 if (conn_num_open(sconn
) > 2047) {
1044 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1048 vuser
= get_valid_user_struct(sconn
, vuid
);
1050 DEBUG(1,("make_connection: refusing to connect with "
1051 "no session setup\n"));
1052 *status
= NT_STATUS_ACCESS_DENIED
;
1056 /* Logic to try and connect to the correct [homes] share, preferably
1057 without too many getpwnam() lookups. This is particulary nasty for
1058 winbind usernames, where the share name isn't the same as unix
1061 The snum of the homes share is stored on the vuser at session setup
1065 if (strequal(service_in
,HOMES_NAME
)) {
1066 if (vuser
->homes_snum
== -1) {
1067 DEBUG(2, ("[homes] share not available for "
1068 "this user because it was not found "
1069 "or created at session setup "
1071 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1074 DEBUG(5, ("making a connection to [homes] service "
1075 "created at session setup time\n"));
1076 return make_connection_smb1(sconn
, now
,
1080 } else if ((vuser
->homes_snum
!= -1)
1081 && strequal(service_in
,
1082 lp_servicename(talloc_tos(), vuser
->homes_snum
))) {
1083 DEBUG(5, ("making a connection to 'homes' service [%s] "
1084 "created at session setup time\n", service_in
));
1085 return make_connection_smb1(sconn
, now
,
1091 service
= talloc_strdup(talloc_tos(), service_in
);
1093 *status
= NT_STATUS_NO_MEMORY
;
1097 if (!strlower_m(service
)) {
1098 DEBUG(2, ("strlower_m %s failed\n", service
));
1099 *status
= NT_STATUS_INVALID_PARAMETER
;
1103 snum
= find_service(talloc_tos(), service
, &service
);
1105 *status
= NT_STATUS_NO_MEMORY
;
1110 if (strequal(service
,"IPC$") ||
1111 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1112 DEBUG(3,("refusing IPC connection to %s\n", service
));
1113 *status
= NT_STATUS_ACCESS_DENIED
;
1117 DEBUG(3,("%s (%s) couldn't find service %s\n",
1118 get_remote_machine_name(),
1119 tsocket_address_string(
1120 sconn
->remote_address
, talloc_tos()),
1122 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1126 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1127 if (lp_host_msdfs() && (*lp_msdfs_proxy(talloc_tos(), snum
) != '\0')) {
1128 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1129 "(pointing to %s)\n",
1130 service
, lp_msdfs_proxy(talloc_tos(), snum
)));
1131 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1135 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1137 return make_connection_smb1(sconn
, now
, snum
, vuser
,
1141 /****************************************************************************
1143 ****************************************************************************/
1145 void close_cnum(connection_struct
*conn
, uint64_t vuid
)
1147 file_close_conn(conn
);
1149 if (!IS_IPC(conn
)) {
1150 dptr_closecnum(conn
);
1153 change_to_root_user();
1155 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1156 get_remote_machine_name(),
1157 tsocket_address_string(conn
->sconn
->remote_address
,
1159 lp_servicename(talloc_tos(), SNUM(conn
))));
1161 /* Call VFS disconnect hook */
1162 SMB_VFS_DISCONNECT(conn
);
1164 /* make sure we leave the directory available for unmount */
1165 vfs_ChDir(conn
, "/");
1167 /* execute any "postexec = " line */
1168 if (*lp_postexec(talloc_tos(), SNUM(conn
)) &&
1169 change_to_user(conn
, vuid
)) {
1170 char *cmd
= talloc_sub_advanced(talloc_tos(),
1171 lp_servicename(talloc_tos(), SNUM(conn
)),
1172 conn
->session_info
->unix_info
->unix_name
,
1174 conn
->session_info
->unix_token
->gid
,
1175 conn
->session_info
->unix_info
->sanitized_username
,
1176 conn
->session_info
->info
->domain_name
,
1177 lp_postexec(talloc_tos(), SNUM(conn
)));
1180 change_to_root_user();
1183 change_to_root_user();
1184 /* execute any "root postexec = " line */
1185 if (*lp_rootpostexec(talloc_tos(), SNUM(conn
))) {
1186 char *cmd
= talloc_sub_advanced(talloc_tos(),
1187 lp_servicename(talloc_tos(), SNUM(conn
)),
1188 conn
->session_info
->unix_info
->unix_name
,
1190 conn
->session_info
->unix_token
->gid
,
1191 conn
->session_info
->unix_info
->sanitized_username
,
1192 conn
->session_info
->info
->domain_name
,
1193 lp_rootpostexec(talloc_tos(), SNUM(conn
)));