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 extern userdom_struct current_user_info
;
36 static bool canonicalize_connect_path(connection_struct
*conn
)
39 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
);
43 ret
= set_conn_connectpath(conn
,resolved_name
);
44 SAFE_FREE(resolved_name
);
48 /****************************************************************************
49 Ensure when setting connectpath it is a canonicalized (no ./ // or ../)
50 absolute path stating in / and not ending in /.
51 Observent people will notice a similarity between this and check_path_syntax :-).
52 ****************************************************************************/
54 bool set_conn_connectpath(connection_struct
*conn
, const char *connectpath
)
58 const char *s
= connectpath
;
59 bool start_of_name_component
= true;
61 if (connectpath
== NULL
|| connectpath
[0] == '\0') {
65 /* Allocate for strlen + '\0' + possible leading '/' */
66 destname
= (char *)SMB_MALLOC(strlen(connectpath
) + 2);
72 *d
++ = '/'; /* Always start with root. */
76 /* Eat multiple '/' */
80 if ((d
> destname
+ 1) && (*s
!= '\0')) {
83 start_of_name_component
= True
;
87 if (start_of_name_component
) {
88 if ((s
[0] == '.') && (s
[1] == '.') && (s
[2] == '/' || s
[2] == '\0')) {
89 /* Uh oh - "/../" or "/..\0" ! */
91 /* Go past the ../ or .. */
95 s
+= 2; /* Go past the .. */
98 /* If we just added a '/' - delete it */
99 if ((d
> destname
) && (*(d
-1) == '/')) {
104 /* Are we at the start ? Can't go back further if so. */
106 *d
++ = '/'; /* Can't delete root */
109 /* Go back one level... */
110 /* Decrement d first as d points to the *next* char to write into. */
111 for (d
--; d
> destname
; d
--) {
116 /* We're still at the start of a name component, just the previous one. */
118 } else if ((s
[0] == '.') && ((s
[1] == '\0') || s
[1] == '/')) {
119 /* Component of pathname can't be "." only - skip the '.' . */
133 /* Get the size of the next MB character. */
134 next_codepoint(s
,&siz
);
155 start_of_name_component
= false;
159 /* And must not end in '/' */
160 if (d
> destname
+ 1 && (*(d
-1) == '/')) {
164 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
165 lp_servicename(SNUM(conn
)), destname
));
167 string_set(&conn
->connectpath
, destname
);
172 /****************************************************************************
173 Load parameters specific to a connection/service.
174 ****************************************************************************/
176 bool set_current_service(connection_struct
*conn
, uint16 flags
, bool do_chdir
)
185 conn
->lastused_count
++;
190 vfs_ChDir(conn
,conn
->connectpath
) != 0 &&
191 vfs_ChDir(conn
,conn
->origpath
) != 0) {
192 DEBUG(((errno
!=EACCES
)?0:3),("chdir (%s) failed, reason: %s\n",
193 conn
->connectpath
, strerror(errno
)));
197 if ((conn
== last_conn
) && (last_flags
== flags
)) {
204 /* Obey the client case sensitivity requests - only for clients that support it. */
205 switch (lp_casesensitive(snum
)) {
208 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
209 enum remote_arch_types ra_type
= get_remote_arch();
210 if ((ra_type
!= RA_SAMBA
) && (ra_type
!= RA_CIFSFS
)) {
211 /* Client can't support per-packet case sensitive pathnames. */
212 conn
->case_sensitive
= False
;
214 conn
->case_sensitive
= !(flags
& FLAG_CASELESS_PATHNAMES
);
219 conn
->case_sensitive
= True
;
222 conn
->case_sensitive
= False
;
228 /****************************************************************************
229 do some basic sainity checks on the share.
230 This function modifies dev, ecode.
231 ****************************************************************************/
233 static NTSTATUS
share_sanity_checks(const struct tsocket_address
*remote_address
,
240 raddr
= tsocket_address_inet_addr_string(remote_address
,
243 return NT_STATUS_NO_MEMORY
;
246 if (!lp_snum_ok(snum
) ||
247 !allow_access(lp_hostsdeny(snum
), lp_hostsallow(snum
),
249 return NT_STATUS_ACCESS_DENIED
;
252 if (dev
[0] == '?' || !dev
[0]) {
253 if (lp_print_ok(snum
)) {
254 fstrcpy(dev
,"LPT1:");
255 } else if (strequal(lp_fstype(snum
), "IPC")) {
264 if (lp_print_ok(snum
)) {
265 if (!strequal(dev
, "LPT1:")) {
266 return NT_STATUS_BAD_DEVICE_TYPE
;
268 } else if (strequal(lp_fstype(snum
), "IPC")) {
269 if (!strequal(dev
, "IPC")) {
270 return NT_STATUS_BAD_DEVICE_TYPE
;
272 } else if (!strequal(dev
, "A:")) {
273 return NT_STATUS_BAD_DEVICE_TYPE
;
276 /* Behave as a printer if we are supposed to */
277 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
278 fstrcpy(dev
, "LPT1:");
285 * Go through lookup_name etc to find the force'd group.
287 * Create a new token from src_token, replacing the primary group sid with the
291 static NTSTATUS
find_forced_group(bool force_user
,
292 int snum
, const char *username
,
293 struct dom_sid
*pgroup_sid
,
296 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
297 TALLOC_CTX
*frame
= talloc_stackframe();
298 struct dom_sid group_sid
;
299 enum lsa_SidType type
;
301 bool user_must_be_member
= False
;
304 groupname
= talloc_strdup(talloc_tos(), lp_force_group(snum
));
305 if (groupname
== NULL
) {
306 DEBUG(1, ("talloc_strdup failed\n"));
307 result
= NT_STATUS_NO_MEMORY
;
311 if (groupname
[0] == '+') {
312 user_must_be_member
= True
;
316 groupname
= talloc_string_sub(talloc_tos(), groupname
,
317 "%S", lp_servicename(snum
));
318 if (groupname
== NULL
) {
319 DEBUG(1, ("talloc_string_sub failed\n"));
320 result
= NT_STATUS_NO_MEMORY
;
324 if (!lookup_name_smbconf(talloc_tos(), groupname
,
325 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
326 NULL
, NULL
, &group_sid
, &type
)) {
327 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
332 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
333 (type
!= SID_NAME_WKN_GRP
)) {
334 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
335 sid_type_lookup(type
)));
339 if (!sid_to_gid(&group_sid
, &gid
)) {
340 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
341 sid_string_dbg(&group_sid
), groupname
));
346 * If the user has been forced and the forced group starts with a '+',
347 * then we only set the group to be the forced group if the forced
348 * user is a member of that group. Otherwise, the meaning of the '+'
352 if (force_user
&& user_must_be_member
) {
353 if (user_in_group_sid(username
, &group_sid
)) {
354 sid_copy(pgroup_sid
, &group_sid
);
356 DEBUG(3,("Forced group %s for member %s\n",
357 groupname
, username
));
359 DEBUG(0,("find_forced_group: forced user %s is not a member "
360 "of forced group %s. Disallowing access.\n",
361 username
, groupname
));
362 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
366 sid_copy(pgroup_sid
, &group_sid
);
368 DEBUG(3,("Forced group %s\n", groupname
));
371 result
= NT_STATUS_OK
;
377 /****************************************************************************
378 Create an auth_session_info structure for a connection_struct
379 ****************************************************************************/
381 static NTSTATUS
create_connection_session_info(struct smbd_server_connection
*sconn
,
382 TALLOC_CTX
*mem_ctx
, int snum
,
383 struct auth_session_info
*vuid_serverinfo
,
385 struct auth_session_info
**presult
)
387 if (lp_guest_only(snum
)) {
388 return make_session_info_guest(mem_ctx
, presult
);
391 if (vuid_serverinfo
!= NULL
) {
393 struct auth_session_info
*result
;
396 * This is the normal security != share case where we have a
397 * valid vuid from the session setup. */
399 if (security_session_user_level(vuid_serverinfo
, NULL
) < SECURITY_USER
) {
400 if (!lp_guest_ok(snum
)) {
401 DEBUG(2, ("guest user (from session setup) "
402 "not permitted to access this share "
403 "(%s)\n", lp_servicename(snum
)));
404 return NT_STATUS_ACCESS_DENIED
;
407 if (!user_ok_token(vuid_serverinfo
->unix_info
->unix_name
,
408 vuid_serverinfo
->info
->domain_name
,
409 vuid_serverinfo
->security_token
, snum
)) {
410 DEBUG(2, ("user '%s' (from session setup) not "
411 "permitted to access this share "
413 vuid_serverinfo
->unix_info
->unix_name
,
414 lp_servicename(snum
)));
415 return NT_STATUS_ACCESS_DENIED
;
419 result
= copy_session_info(mem_ctx
, vuid_serverinfo
);
420 if (result
== NULL
) {
421 return NT_STATUS_NO_MEMORY
;
428 if (lp_security() == SEC_SHARE
) {
433 /* add the sharename as a possible user name if we
434 are in share mode security */
436 add_session_user(sconn
, lp_servicename(snum
));
438 /* shall we let them in? */
440 if (!authorise_login(sconn
, snum
,user
,password
,&guest
)) {
441 DEBUG( 2, ( "Invalid username/password for [%s]\n",
442 lp_servicename(snum
)) );
443 return NT_STATUS_WRONG_PASSWORD
;
446 return make_session_info_from_username(mem_ctx
, user
, guest
,
450 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
451 return NT_STATUS_ACCESS_DENIED
;
454 /****************************************************************************
455 set relavent user and group settings corresponding to force user/group
456 configuration for the given snum.
457 ****************************************************************************/
459 NTSTATUS
set_conn_force_user_group(connection_struct
*conn
, int snum
)
463 if (*lp_force_user(snum
)) {
466 * Replace conn->session_info with a completely faked up one
467 * from the username we are forced into :-)
471 struct auth_session_info
*forced_serverinfo
;
474 fuser
= talloc_string_sub(conn
, lp_force_user(snum
), "%S",
475 lp_const_servicename(snum
));
477 return NT_STATUS_NO_MEMORY
;
480 guest
= security_session_user_level(conn
->session_info
, NULL
) < SECURITY_USER
;
482 status
= make_session_info_from_username(
486 if (!NT_STATUS_IS_OK(status
)) {
490 TALLOC_FREE(conn
->session_info
);
491 conn
->session_info
= forced_serverinfo
;
493 conn
->force_user
= true;
494 DEBUG(3,("Forced user %s\n", fuser
));
498 * If force group is true, then override
499 * any groupid stored for the connecting user.
502 if (*lp_force_group(snum
)) {
504 status
= find_forced_group(
505 conn
->force_user
, snum
, conn
->session_info
->unix_info
->unix_name
,
506 &conn
->session_info
->security_token
->sids
[1],
507 &conn
->session_info
->unix_token
->gid
);
509 if (!NT_STATUS_IS_OK(status
)) {
514 * We need to cache this gid, to use within
515 * change_to_user() separately from the conn->session_info
516 * struct. We only use conn->session_info directly if
517 * "force_user" was set.
519 conn
->force_group_gid
= conn
->session_info
->unix_token
->gid
;
525 /****************************************************************************
526 Make a connection, given the snum to connect to, and the vuser of the
527 connecting user if appropriate.
528 ****************************************************************************/
530 static NTSTATUS
make_connection_snum(struct smbd_server_connection
*sconn
,
531 connection_struct
*conn
,
532 int snum
, user_struct
*vuser
,
536 struct smb_filename
*smb_fname_cpath
= NULL
;
539 bool on_err_call_dis_hook
= false;
540 bool claimed_connection
= false;
547 status
= share_sanity_checks(sconn
->remote_address
,
548 sconn
->remote_hostname
,
551 if (NT_STATUS_IS_ERR(status
)) {
555 conn
->params
->service
= snum
;
557 status
= create_connection_session_info(sconn
,
558 conn
, snum
, vuser
? vuser
->session_info
: NULL
, password
,
559 &conn
->session_info
);
561 if (!NT_STATUS_IS_OK(status
)) {
562 DEBUG(1, ("create_connection_session_info failed: %s\n",
567 if ((lp_guest_only(snum
)) || (lp_security() == SEC_SHARE
)) {
568 conn
->force_user
= true;
571 add_session_user(sconn
, conn
->session_info
->unix_info
->unix_name
);
573 conn
->num_files_open
= 0;
574 conn
->lastused
= conn
->lastused_count
= time(NULL
);
576 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
577 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
578 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
580 /* Case options for the share. */
581 if (lp_casesensitive(snum
) == Auto
) {
582 /* We will be setting this per packet. Set to be case
583 * insensitive for now. */
584 conn
->case_sensitive
= False
;
586 conn
->case_sensitive
= (bool)lp_casesensitive(snum
);
589 conn
->case_preserve
= lp_preservecase(snum
);
590 conn
->short_case_preserve
= lp_shortpreservecase(snum
);
592 conn
->encrypt_level
= lp_smb_encrypt(snum
);
594 conn
->veto_list
= NULL
;
595 conn
->hide_list
= NULL
;
596 conn
->veto_oplock_list
= NULL
;
597 conn
->aio_write_behind_list
= NULL
;
599 conn
->read_only
= lp_readonly(SNUM(conn
));
601 status
= set_conn_force_user_group(conn
, snum
);
602 if (!NT_STATUS_IS_OK(status
)) {
606 conn
->vuid
= (vuser
!= NULL
) ? vuser
->vuid
: UID_FIELD_INVALID
;
609 char *s
= talloc_sub_advanced(talloc_tos(),
610 lp_servicename(SNUM(conn
)),
611 conn
->session_info
->unix_info
->unix_name
,
613 conn
->session_info
->unix_token
->gid
,
614 conn
->session_info
->unix_info
->sanitized_username
,
615 conn
->session_info
->info
->domain_name
,
618 status
= NT_STATUS_NO_MEMORY
;
622 if (!set_conn_connectpath(conn
,s
)) {
624 status
= NT_STATUS_NO_MEMORY
;
627 DEBUG(3,("Connect path is '%s' for service [%s]\n",s
,
628 lp_servicename(snum
)));
633 * New code to check if there's a share security descripter
634 * added from NT server manager. This is done after the
635 * smb.conf checks are done as we need a uid and token. JRA.
639 share_access_check(conn
->session_info
->security_token
,
640 lp_servicename(snum
), MAXIMUM_ALLOWED_ACCESS
,
641 &conn
->share_access
);
643 if ((conn
->share_access
& FILE_WRITE_DATA
) == 0) {
644 if ((conn
->share_access
& FILE_READ_DATA
) == 0) {
645 /* No access, read or write. */
646 DEBUG(0,("make_connection: connection to %s "
647 "denied due to security "
649 lp_servicename(snum
)));
650 status
= NT_STATUS_ACCESS_DENIED
;
653 conn
->read_only
= True
;
656 /* Initialise VFS function pointers */
658 if (!smbd_vfs_init(conn
)) {
659 DEBUG(0, ("vfs_init failed for service %s\n",
660 lp_servicename(snum
)));
661 status
= NT_STATUS_BAD_NETWORK_NAME
;
665 /* ROOT Activities: */
666 /* explicitly check widelinks here so that we can correctly warn
668 widelinks_warning(snum
);
671 * Enforce the max connections parameter.
674 if ((lp_max_connections(snum
) > 0)
675 && (count_current_connections(lp_servicename(SNUM(conn
)), True
) >=
676 lp_max_connections(snum
))) {
678 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
679 lp_max_connections(snum
), lp_servicename(snum
)));
680 status
= NT_STATUS_INSUFFICIENT_RESOURCES
;
685 * Get us an entry in the connections db
687 if (!claim_connection(conn
, lp_servicename(snum
))) {
688 DEBUG(1, ("Could not store connections entry\n"));
689 status
= NT_STATUS_INTERNAL_DB_ERROR
;
692 claimed_connection
= true;
694 /* Invoke VFS make connection hook - this must be the first
695 filesystem operation that we do. */
697 if (SMB_VFS_CONNECT(conn
, lp_servicename(snum
),
698 conn
->session_info
->unix_info
->unix_name
) < 0) {
699 DEBUG(0,("make_connection: VFS make connection failed!\n"));
700 status
= NT_STATUS_UNSUCCESSFUL
;
704 /* Any error exit after here needs to call the disconnect hook. */
705 on_err_call_dis_hook
= true;
707 if ((!conn
->printer
) && (!conn
->ipc
)) {
708 conn
->notify_ctx
= notify_init(conn
,
709 messaging_server_id(sconn
->msg_ctx
),
716 * Fix compatibility issue pointed out by Volker.
717 * We pass the conn->connectpath to the preexec
718 * scripts as a parameter, so attempt to canonicalize
719 * it here before calling the preexec scripts.
720 * We ignore errors here, as it is possible that
721 * the conn->connectpath doesn't exist yet and
722 * the preexec scripts will create them.
725 (void)canonicalize_connect_path(conn
);
727 /* Preexecs are done here as they might make the dir we are to ChDir
729 /* execute any "root preexec = " line */
730 if (*lp_rootpreexec(snum
)) {
731 char *cmd
= talloc_sub_advanced(talloc_tos(),
732 lp_servicename(SNUM(conn
)),
733 conn
->session_info
->unix_info
->unix_name
,
735 conn
->session_info
->unix_token
->gid
,
736 conn
->session_info
->unix_info
->sanitized_username
,
737 conn
->session_info
->info
->domain_name
,
738 lp_rootpreexec(snum
));
739 DEBUG(5,("cmd=%s\n",cmd
));
740 ret
= smbrun(cmd
,NULL
);
742 if (ret
!= 0 && lp_rootpreexec_close(snum
)) {
743 DEBUG(1,("root preexec gave %d - failing "
744 "connection\n", ret
));
745 status
= NT_STATUS_ACCESS_DENIED
;
750 /* USER Activites: */
751 if (!change_to_user(conn
, conn
->vuid
)) {
752 /* No point continuing if they fail the basic checks */
753 DEBUG(0,("Can't become connected user!\n"));
754 status
= NT_STATUS_LOGON_FAILURE
;
761 /* Remember that a different vuid can connect later without these
764 /* Preexecs are done here as they might make the dir we are to ChDir
767 /* execute any "preexec = " line */
768 if (*lp_preexec(snum
)) {
769 char *cmd
= talloc_sub_advanced(talloc_tos(),
770 lp_servicename(SNUM(conn
)),
771 conn
->session_info
->unix_info
->unix_name
,
773 conn
->session_info
->unix_token
->gid
,
774 conn
->session_info
->unix_info
->sanitized_username
,
775 conn
->session_info
->info
->domain_name
,
777 ret
= smbrun(cmd
,NULL
);
779 if (ret
!= 0 && lp_preexec_close(snum
)) {
780 DEBUG(1,("preexec gave %d - failing connection\n",
782 status
= NT_STATUS_ACCESS_DENIED
;
787 #ifdef WITH_FAKE_KASERVER
788 if (lp_afs_share(snum
)) {
794 * we've finished with the user stuff - go back to root
795 * so the SMB_VFS_STAT call will only fail on path errors,
796 * not permission problems.
798 change_to_root_user();
799 /* ROOT Activites: */
802 * If widelinks are disallowed we need to canonicalise the connect
803 * path here to ensure we don't have any symlinks in the
804 * connectpath. We will be checking all paths on this connection are
805 * below this directory. We must do this after the VFS init as we
806 * depend on the realpath() pointer in the vfs table. JRA.
808 if (!lp_widelinks(snum
)) {
809 if (!canonicalize_connect_path(conn
)) {
810 DEBUG(0, ("canonicalize_connect_path failed "
811 "for service %s, path %s\n",
812 lp_servicename(snum
),
814 status
= NT_STATUS_BAD_NETWORK_NAME
;
819 /* Add veto/hide lists */
820 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
821 set_namearray( &conn
->veto_list
, lp_veto_files(snum
));
822 set_namearray( &conn
->hide_list
, lp_hide_files(snum
));
823 set_namearray( &conn
->veto_oplock_list
, lp_veto_oplocks(snum
));
824 set_namearray( &conn
->aio_write_behind_list
,
825 lp_aio_write_behind(snum
));
827 status
= create_synthetic_smb_fname(talloc_tos(), conn
->connectpath
,
828 NULL
, NULL
, &smb_fname_cpath
);
829 if (!NT_STATUS_IS_OK(status
)) {
833 /* win2000 does not check the permissions on the directory
834 during the tree connect, instead relying on permission
835 check during individual operations. To match this behaviour
836 I have disabled this chdir check (tridge) */
837 /* the alternative is just to check the directory exists */
839 if ((ret
= SMB_VFS_STAT(conn
, smb_fname_cpath
)) != 0 ||
840 !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
841 if (ret
== 0 && !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
842 DEBUG(0,("'%s' is not a directory, when connecting to "
843 "[%s]\n", conn
->connectpath
,
844 lp_servicename(snum
)));
846 DEBUG(0,("'%s' does not exist or permission denied "
847 "when connecting to [%s] Error was %s\n",
848 conn
->connectpath
, lp_servicename(snum
),
851 status
= NT_STATUS_BAD_NETWORK_NAME
;
854 conn
->base_share_dev
= smb_fname_cpath
->st
.st_ex_dev
;
856 string_set(&conn
->origpath
,conn
->connectpath
);
858 /* Figure out the characteristics of the underlying filesystem. This
859 * assumes that all the filesystem mounted withing a share path have
860 * the same characteristics, which is likely but not guaranteed.
863 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
, &conn
->ts_res
);
866 * Print out the 'connected as' stuff here as we need
867 * to know the effective uid and gid we will be using
868 * (at least initially).
871 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
872 dbgtext( "%s (%s) ", get_remote_machine_name(),
873 tsocket_address_string(conn
->sconn
->remote_address
,
875 dbgtext( "%s", srv_is_signing_active(sconn
) ? "signed " : "");
876 dbgtext( "connect to service %s ", lp_servicename(snum
) );
877 dbgtext( "initially as user %s ",
878 conn
->session_info
->unix_info
->unix_name
);
879 dbgtext( "(uid=%d, gid=%d) ", (int)effuid
, (int)effgid
);
880 dbgtext( "(pid %d)\n", (int)sys_getpid() );
887 TALLOC_FREE(smb_fname_cpath
);
888 /* We must exit this function as root. */
889 if (geteuid() != 0) {
890 change_to_root_user();
892 if (on_err_call_dis_hook
) {
893 /* Call VFS disconnect hook */
894 SMB_VFS_DISCONNECT(conn
);
896 if (claimed_connection
) {
897 yield_connection(conn
, lp_servicename(snum
));
902 /****************************************************************************
903 Make a connection to a service from SMB1. Internal interface.
904 ****************************************************************************/
906 static connection_struct
*make_connection_smb1(struct smbd_server_connection
*sconn
,
907 int snum
, user_struct
*vuser
,
912 connection_struct
*conn
= conn_new(sconn
);
914 DEBUG(0,("make_connection_smb1: Couldn't find free connection.\n"));
915 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
918 *pstatus
= make_connection_snum(sconn
,
924 if (!NT_STATUS_IS_OK(*pstatus
)) {
931 /****************************************************************************
932 Make a connection to a service from SMB2. External SMB2 interface.
933 We must set cnum before claiming connection.
934 ****************************************************************************/
936 connection_struct
*make_connection_smb2(struct smbd_server_connection
*sconn
,
937 struct smbd_smb2_tcon
*tcon
,
943 connection_struct
*conn
= conn_new(sconn
);
945 DEBUG(0,("make_connection_smb2: Couldn't find free connection.\n"));
946 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
949 conn
->cnum
= tcon
->tid
;
950 *pstatus
= make_connection_snum(sconn
,
956 if (!NT_STATUS_IS_OK(*pstatus
)) {
963 /****************************************************************************
964 Make a connection to a service. External SMB1 interface.
967 ****************************************************************************/
969 connection_struct
*make_connection(struct smbd_server_connection
*sconn
,
970 const char *service_in
, DATA_BLOB password
,
971 const char *pdev
, uint16 vuid
,
975 user_struct
*vuser
= NULL
;
976 char *service
= NULL
;
982 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
984 if (!non_root_mode() && (euid
= geteuid()) != 0) {
985 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
986 "(%u)\n", (unsigned int)euid
));
987 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
990 if (conn_num_open(sconn
) > 2047) {
991 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
995 if(lp_security() != SEC_SHARE
) {
996 vuser
= get_valid_user_struct(sconn
, vuid
);
998 DEBUG(1,("make_connection: refusing to connect with "
999 "no session setup\n"));
1000 *status
= NT_STATUS_ACCESS_DENIED
;
1005 /* Logic to try and connect to the correct [homes] share, preferably
1006 without too many getpwnam() lookups. This is particulary nasty for
1007 winbind usernames, where the share name isn't the same as unix
1010 The snum of the homes share is stored on the vuser at session setup
1014 if (strequal(service_in
,HOMES_NAME
)) {
1015 if(lp_security() != SEC_SHARE
) {
1016 DATA_BLOB no_pw
= data_blob_null
;
1017 if (vuser
->homes_snum
== -1) {
1018 DEBUG(2, ("[homes] share not available for "
1019 "this user because it was not found "
1020 "or created at session setup "
1022 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1025 DEBUG(5, ("making a connection to [homes] service "
1026 "created at session setup time\n"));
1027 return make_connection_smb1(sconn
,
1032 /* Security = share. Try with
1033 * current_user_info.smb_name as the username. */
1034 if (*current_user_info
.smb_name
) {
1035 char *unix_username
= NULL
;
1036 (void)map_username(talloc_tos(),
1037 current_user_info
.smb_name
,
1039 snum
= find_service(talloc_tos(),
1042 if (!unix_username
) {
1043 *status
= NT_STATUS_NO_MEMORY
;
1048 DEBUG(5, ("making a connection to 'homes' "
1049 "service %s based on "
1050 "security=share\n", service_in
));
1051 return make_connection_smb1(sconn
,
1057 } else if ((lp_security() != SEC_SHARE
) && (vuser
->homes_snum
!= -1)
1058 && strequal(service_in
,
1059 lp_servicename(vuser
->homes_snum
))) {
1060 DATA_BLOB no_pw
= data_blob_null
;
1061 DEBUG(5, ("making a connection to 'homes' service [%s] "
1062 "created at session setup time\n", service_in
));
1063 return make_connection_smb1(sconn
,
1069 service
= talloc_strdup(talloc_tos(), service_in
);
1071 *status
= NT_STATUS_NO_MEMORY
;
1075 strlower_m(service
);
1077 snum
= find_service(talloc_tos(), service
, &service
);
1079 *status
= NT_STATUS_NO_MEMORY
;
1084 if (strequal(service
,"IPC$") ||
1085 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1086 DEBUG(3,("refusing IPC connection to %s\n", service
));
1087 *status
= NT_STATUS_ACCESS_DENIED
;
1091 DEBUG(3,("%s (%s) couldn't find service %s\n",
1092 get_remote_machine_name(),
1093 tsocket_address_string(
1094 sconn
->remote_address
, talloc_tos()),
1096 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1100 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1101 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum
) != '\0')) {
1102 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1103 "(pointing to %s)\n",
1104 service
, lp_msdfs_proxy(snum
)));
1105 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1109 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1111 return make_connection_smb1(sconn
, snum
, vuser
,
1116 /****************************************************************************
1118 ****************************************************************************/
1120 void close_cnum(connection_struct
*conn
, uint16 vuid
)
1122 file_close_conn(conn
);
1124 if (!IS_IPC(conn
)) {
1125 dptr_closecnum(conn
);
1128 change_to_root_user();
1130 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1131 get_remote_machine_name(),
1132 tsocket_address_string(conn
->sconn
->remote_address
,
1134 lp_servicename(SNUM(conn
))));
1136 /* Call VFS disconnect hook */
1137 SMB_VFS_DISCONNECT(conn
);
1139 yield_connection(conn
, lp_servicename(SNUM(conn
)));
1141 /* make sure we leave the directory available for unmount */
1142 vfs_ChDir(conn
, "/");
1144 /* execute any "postexec = " line */
1145 if (*lp_postexec(SNUM(conn
)) &&
1146 change_to_user(conn
, vuid
)) {
1147 char *cmd
= talloc_sub_advanced(talloc_tos(),
1148 lp_servicename(SNUM(conn
)),
1149 conn
->session_info
->unix_info
->unix_name
,
1151 conn
->session_info
->unix_token
->gid
,
1152 conn
->session_info
->unix_info
->sanitized_username
,
1153 conn
->session_info
->info
->domain_name
,
1154 lp_postexec(SNUM(conn
)));
1157 change_to_root_user();
1160 change_to_root_user();
1161 /* execute any "root postexec = " line */
1162 if (*lp_rootpostexec(SNUM(conn
))) {
1163 char *cmd
= talloc_sub_advanced(talloc_tos(),
1164 lp_servicename(SNUM(conn
)),
1165 conn
->session_info
->unix_info
->unix_name
,
1167 conn
->session_info
->unix_token
->gid
,
1168 conn
->session_info
->unix_info
->sanitized_username
,
1169 conn
->session_info
->info
->domain_name
,
1170 lp_rootpostexec(SNUM(conn
)));