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 "smbd/globals.h"
23 extern userdom_struct current_user_info
;
25 static bool canonicalize_connect_path(connection_struct
*conn
)
27 #ifdef REALPATH_TAKES_NULL
29 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
,NULL
);
33 ret
= set_conn_connectpath(conn
,resolved_name
);
34 SAFE_FREE(resolved_name
);
37 char resolved_name_buf
[PATH_MAX
+1];
38 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
,resolved_name_buf
);
42 return set_conn_connectpath(conn
,resolved_name
);
43 #endif /* REALPATH_TAKES_NULL */
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 destname
= SMB_STRDUP(connectpath
);
69 *d
++ = '/'; /* Always start with root. */
73 /* Eat multiple '/' */
77 if ((d
> destname
+ 1) && (*s
!= '\0')) {
80 start_of_name_component
= True
;
84 if (start_of_name_component
) {
85 if ((s
[0] == '.') && (s
[1] == '.') && (s
[2] == '/' || s
[2] == '\0')) {
86 /* Uh oh - "/../" or "/..\0" ! */
88 /* Go past the ../ or .. */
92 s
+= 2; /* Go past the .. */
95 /* If we just added a '/' - delete it */
96 if ((d
> destname
) && (*(d
-1) == '/')) {
101 /* Are we at the start ? Can't go back further if so. */
103 *d
++ = '/'; /* Can't delete root */
106 /* Go back one level... */
107 /* Decrement d first as d points to the *next* char to write into. */
108 for (d
--; d
> destname
; d
--) {
113 /* We're still at the start of a name component, just the previous one. */
115 } else if ((s
[0] == '.') && ((s
[1] == '\0') || s
[1] == '/')) {
116 /* Component of pathname can't be "." only - skip the '.' . */
130 /* Get the size of the next MB character. */
131 next_codepoint(s
,&siz
);
152 start_of_name_component
= false;
156 /* And must not end in '/' */
157 if (d
> destname
+ 1 && (*(d
-1) == '/')) {
161 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
162 lp_servicename(SNUM(conn
)), destname
));
164 string_set(&conn
->connectpath
, destname
);
169 /****************************************************************************
170 Load parameters specific to a connection/service.
171 ****************************************************************************/
173 bool set_current_service(connection_struct
*conn
, uint16 flags
, bool do_chdir
)
182 conn
->lastused_count
++;
187 vfs_ChDir(conn
,conn
->connectpath
) != 0 &&
188 vfs_ChDir(conn
,conn
->origpath
) != 0) {
189 DEBUG(0,("chdir (%s) failed\n",
194 if ((conn
== last_conn
) && (last_flags
== flags
)) {
201 /* Obey the client case sensitivity requests - only for clients that support it. */
202 switch (lp_casesensitive(snum
)) {
205 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
206 enum remote_arch_types ra_type
= get_remote_arch();
207 if ((ra_type
!= RA_SAMBA
) && (ra_type
!= RA_CIFSFS
)) {
208 /* Client can't support per-packet case sensitive pathnames. */
209 conn
->case_sensitive
= False
;
211 conn
->case_sensitive
= !(flags
& FLAG_CASELESS_PATHNAMES
);
216 conn
->case_sensitive
= True
;
219 conn
->case_sensitive
= False
;
225 static int load_registry_service(const char *servicename
)
227 if (!lp_registry_shares()) {
231 if ((servicename
== NULL
) || (*servicename
== '\0')) {
235 if (strequal(servicename
, GLOBAL_NAME
)) {
239 if (!process_registry_service(servicename
)) {
243 return lp_servicenumber(servicename
);
246 void load_registry_shares(void)
248 DEBUG(8, ("load_registry_shares()\n"));
249 if (!lp_registry_shares()) {
253 process_registry_shares();
258 /****************************************************************************
259 Add a home service. Returns the new service number or -1 if fail.
260 ****************************************************************************/
262 int add_home_service(const char *service
, const char *username
, const char *homedir
)
266 if (!service
|| !homedir
|| homedir
[0] == '\0')
269 if ((iHomeService
= lp_servicenumber(HOMES_NAME
)) < 0) {
270 if ((iHomeService
= load_registry_service(HOMES_NAME
)) < 0) {
276 * If this is a winbindd provided username, remove
277 * the domain component before adding the service.
278 * Log a warning if the "path=" parameter does not
279 * include any macros.
283 const char *p
= strchr(service
,*lp_winbind_separator());
285 /* We only want the 'user' part of the string */
291 if (!lp_add_home(service
, iHomeService
, username
, homedir
)) {
295 return lp_servicenumber(service
);
300 * Find a service entry.
302 * @param service is modified (to canonical form??)
305 int find_service(fstring service
)
309 all_string_sub(service
,"\\","/",0);
311 iService
= lp_servicenumber(service
);
313 /* now handle the special case of a home directory */
315 char *phome_dir
= get_user_home_dir(talloc_tos(), service
);
319 * Try mapping the servicename, it may
320 * be a Windows to unix mapped user name.
322 if(map_username(service
))
323 phome_dir
= get_user_home_dir(
324 talloc_tos(), service
);
327 DEBUG(3,("checking for home directory %s gave %s\n",service
,
328 phome_dir
?phome_dir
:"(NULL)"));
330 iService
= add_home_service(service
,service
/* 'username' */, phome_dir
);
333 /* If we still don't have a service, attempt to add it as a printer. */
337 if ((iPrinterService
= lp_servicenumber(PRINTERS_NAME
)) < 0) {
338 iPrinterService
= load_registry_service(PRINTERS_NAME
);
340 if (iPrinterService
) {
341 DEBUG(3,("checking whether %s is a valid printer name...\n", service
));
342 if (pcap_printername_ok(service
)) {
343 DEBUG(3,("%s is a valid printer name\n", service
));
344 DEBUG(3,("adding %s as a printer service\n", service
));
345 lp_add_printer(service
, iPrinterService
);
346 iService
= lp_servicenumber(service
);
348 DEBUG(0,("failed to add %s as a printer service!\n", service
));
351 DEBUG(3,("%s is not a valid printer name\n", service
));
356 /* Check for default vfs service? Unsure whether to implement this */
361 iService
= load_registry_service(service
);
364 /* Is it a usershare service ? */
365 if (iService
< 0 && *lp_usershare_path()) {
366 /* Ensure the name is canonicalized. */
368 iService
= load_usershare_service(service
);
371 /* just possibly it's a default service? */
373 char *pdefservice
= lp_defaultservice();
374 if (pdefservice
&& *pdefservice
&& !strequal(pdefservice
,service
) && !strstr_m(service
,"..")) {
376 * We need to do a local copy here as lp_defaultservice()
377 * returns one of the rotating lp_string buffers that
378 * could get overwritten by the recursive find_service() call
379 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
381 char *defservice
= SMB_STRDUP(pdefservice
);
387 /* Disallow anything except explicit share names. */
388 if (strequal(defservice
,HOMES_NAME
) ||
389 strequal(defservice
, PRINTERS_NAME
) ||
390 strequal(defservice
, "IPC$")) {
391 SAFE_FREE(defservice
);
395 iService
= find_service(defservice
);
397 all_string_sub(service
, "_","/",0);
398 iService
= lp_add_service(service
, iService
);
400 SAFE_FREE(defservice
);
405 if (!VALID_SNUM(iService
)) {
406 DEBUG(0,("Invalid snum %d for %s\n",iService
, service
));
414 DEBUG(3,("find_service() failed to find service %s\n", service
));
420 /****************************************************************************
421 do some basic sainity checks on the share.
422 This function modifies dev, ecode.
423 ****************************************************************************/
425 static NTSTATUS
share_sanity_checks(int snum
, fstring dev
)
428 if (!lp_snum_ok(snum
) ||
429 !check_access(smbd_server_fd(),
430 lp_hostsallow(snum
), lp_hostsdeny(snum
))) {
431 return NT_STATUS_ACCESS_DENIED
;
434 if (dev
[0] == '?' || !dev
[0]) {
435 if (lp_print_ok(snum
)) {
436 fstrcpy(dev
,"LPT1:");
437 } else if (strequal(lp_fstype(snum
), "IPC")) {
446 if (lp_print_ok(snum
)) {
447 if (!strequal(dev
, "LPT1:")) {
448 return NT_STATUS_BAD_DEVICE_TYPE
;
450 } else if (strequal(lp_fstype(snum
), "IPC")) {
451 if (!strequal(dev
, "IPC")) {
452 return NT_STATUS_BAD_DEVICE_TYPE
;
454 } else if (!strequal(dev
, "A:")) {
455 return NT_STATUS_BAD_DEVICE_TYPE
;
458 /* Behave as a printer if we are supposed to */
459 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
460 fstrcpy(dev
, "LPT1:");
467 * Go through lookup_name etc to find the force'd group.
469 * Create a new token from src_token, replacing the primary group sid with the
473 static NTSTATUS
find_forced_group(bool force_user
,
474 int snum
, const char *username
,
478 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
479 TALLOC_CTX
*frame
= talloc_stackframe();
481 enum lsa_SidType type
;
483 bool user_must_be_member
= False
;
486 groupname
= talloc_strdup(talloc_tos(), lp_force_group(snum
));
487 if (groupname
== NULL
) {
488 DEBUG(1, ("talloc_strdup failed\n"));
489 result
= NT_STATUS_NO_MEMORY
;
493 if (groupname
[0] == '+') {
494 user_must_be_member
= True
;
498 groupname
= talloc_string_sub(talloc_tos(), groupname
,
499 "%S", lp_servicename(snum
));
500 if (groupname
== NULL
) {
501 DEBUG(1, ("talloc_string_sub failed\n"));
502 result
= NT_STATUS_NO_MEMORY
;
506 if (!lookup_name_smbconf(talloc_tos(), groupname
,
507 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
508 NULL
, NULL
, &group_sid
, &type
)) {
509 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
514 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
515 (type
!= SID_NAME_WKN_GRP
)) {
516 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
517 sid_type_lookup(type
)));
521 if (!sid_to_gid(&group_sid
, &gid
)) {
522 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
523 sid_string_dbg(&group_sid
), groupname
));
528 * If the user has been forced and the forced group starts with a '+',
529 * then we only set the group to be the forced group if the forced
530 * user is a member of that group. Otherwise, the meaning of the '+'
534 if (force_user
&& user_must_be_member
) {
535 if (user_in_group_sid(username
, &group_sid
)) {
536 sid_copy(pgroup_sid
, &group_sid
);
538 DEBUG(3,("Forced group %s for member %s\n",
539 groupname
, username
));
541 DEBUG(0,("find_forced_group: forced user %s is not a member "
542 "of forced group %s. Disallowing access.\n",
543 username
, groupname
));
544 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
548 sid_copy(pgroup_sid
, &group_sid
);
550 DEBUG(3,("Forced group %s\n", groupname
));
553 result
= NT_STATUS_OK
;
559 /****************************************************************************
560 Create an auth_serversupplied_info structure for a connection_struct
561 ****************************************************************************/
563 static NTSTATUS
create_connection_server_info(TALLOC_CTX
*mem_ctx
, int snum
,
564 struct auth_serversupplied_info
*vuid_serverinfo
,
566 struct auth_serversupplied_info
**presult
)
568 if (lp_guest_only(snum
)) {
569 return make_server_info_guest(mem_ctx
, presult
);
572 if (vuid_serverinfo
!= NULL
) {
574 struct auth_serversupplied_info
*result
;
577 * This is the normal security != share case where we have a
578 * valid vuid from the session setup. */
580 if (vuid_serverinfo
->guest
) {
581 if (!lp_guest_ok(snum
)) {
582 DEBUG(2, ("guest user (from session setup) "
583 "not permitted to access this share "
584 "(%s)\n", lp_servicename(snum
)));
585 return NT_STATUS_ACCESS_DENIED
;
588 if (!user_ok_token(vuid_serverinfo
->unix_name
,
589 pdb_get_domain(vuid_serverinfo
->sam_account
),
590 vuid_serverinfo
->ptok
, snum
)) {
591 DEBUG(2, ("user '%s' (from session setup) not "
592 "permitted to access this share "
594 vuid_serverinfo
->unix_name
,
595 lp_servicename(snum
)));
596 return NT_STATUS_ACCESS_DENIED
;
600 result
= copy_serverinfo(mem_ctx
, vuid_serverinfo
);
601 if (result
== NULL
) {
602 return NT_STATUS_NO_MEMORY
;
609 if (lp_security() == SEC_SHARE
) {
614 /* add the sharename as a possible user name if we
615 are in share mode security */
617 add_session_user(lp_servicename(snum
));
619 /* shall we let them in? */
621 if (!authorise_login(snum
,user
,password
,&guest
)) {
622 DEBUG( 2, ( "Invalid username/password for [%s]\n",
623 lp_servicename(snum
)) );
624 return NT_STATUS_WRONG_PASSWORD
;
627 return make_serverinfo_from_username(mem_ctx
, user
, guest
,
631 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
632 return NT_STATUS_ACCESS_DENIED
;
636 /****************************************************************************
637 Make a connection, given the snum to connect to, and the vuser of the
638 connecting user if appropriate.
639 ****************************************************************************/
641 static connection_struct
*make_connection_snum(int snum
, user_struct
*vuser
,
646 connection_struct
*conn
;
650 char addr
[INET6_ADDRSTRLEN
];
651 bool on_err_call_dis_hook
= false;
655 SET_STAT_INVALID(st
);
657 if (NT_STATUS_IS_ERR(*pstatus
= share_sanity_checks(snum
, dev
))) {
663 DEBUG(0,("Couldn't find free connection.\n"));
664 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
668 conn
->params
->service
= snum
;
670 status
= create_connection_server_info(
671 conn
, snum
, vuser
? vuser
->server_info
: NULL
, password
,
674 if (!NT_STATUS_IS_OK(status
)) {
675 DEBUG(1, ("create_connection_server_info failed: %s\n",
682 if ((lp_guest_only(snum
)) || (lp_security() == SEC_SHARE
)) {
683 conn
->force_user
= true;
686 add_session_user(conn
->server_info
->unix_name
);
688 safe_strcpy(conn
->client_address
,
689 client_addr(get_client_fd(),addr
,sizeof(addr
)),
690 sizeof(conn
->client_address
)-1);
691 conn
->num_files_open
= 0;
692 conn
->lastused
= conn
->lastused_count
= time(NULL
);
694 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
695 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
696 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
699 /* Case options for the share. */
700 if (lp_casesensitive(snum
) == Auto
) {
701 /* We will be setting this per packet. Set to be case
702 * insensitive for now. */
703 conn
->case_sensitive
= False
;
705 conn
->case_sensitive
= (bool)lp_casesensitive(snum
);
708 conn
->case_preserve
= lp_preservecase(snum
);
709 conn
->short_case_preserve
= lp_shortpreservecase(snum
);
711 conn
->encrypt_level
= lp_smb_encrypt(snum
);
713 conn
->veto_list
= NULL
;
714 conn
->hide_list
= NULL
;
715 conn
->veto_oplock_list
= NULL
;
716 conn
->aio_write_behind_list
= NULL
;
717 string_set(&conn
->dirpath
,"");
719 conn
->read_only
= lp_readonly(SNUM(conn
));
720 conn
->admin_user
= False
;
722 if (*lp_force_user(snum
)) {
725 * Replace conn->server_info with a completely faked up one
726 * from the username we are forced into :-)
730 struct auth_serversupplied_info
*forced_serverinfo
;
732 fuser
= talloc_string_sub(conn
, lp_force_user(snum
), "%S",
733 lp_servicename(snum
));
736 *pstatus
= NT_STATUS_NO_MEMORY
;
740 status
= make_serverinfo_from_username(
741 conn
, fuser
, conn
->server_info
->guest
,
743 if (!NT_STATUS_IS_OK(status
)) {
749 TALLOC_FREE(conn
->server_info
);
750 conn
->server_info
= forced_serverinfo
;
752 conn
->force_user
= True
;
753 DEBUG(3,("Forced user %s\n", fuser
));
757 * If force group is true, then override
758 * any groupid stored for the connecting user.
761 if (*lp_force_group(snum
)) {
763 status
= find_forced_group(
764 conn
->force_user
, snum
, conn
->server_info
->unix_name
,
765 &conn
->server_info
->ptok
->user_sids
[1],
766 &conn
->server_info
->utok
.gid
);
768 if (!NT_STATUS_IS_OK(status
)) {
775 * We need to cache this gid, to use within
776 * change_to_user() separately from the conn->server_info
777 * struct. We only use conn->server_info directly if
778 * "force_user" was set.
780 conn
->force_group_gid
= conn
->server_info
->utok
.gid
;
783 conn
->vuid
= (vuser
!= NULL
) ? vuser
->vuid
: UID_FIELD_INVALID
;
786 char *s
= talloc_sub_advanced(talloc_tos(),
787 lp_servicename(SNUM(conn
)),
788 conn
->server_info
->unix_name
,
790 conn
->server_info
->utok
.gid
,
791 conn
->server_info
->sanitized_username
,
792 pdb_get_domain(conn
->server_info
->sam_account
),
796 *pstatus
= NT_STATUS_NO_MEMORY
;
800 if (!set_conn_connectpath(conn
,s
)) {
803 *pstatus
= NT_STATUS_NO_MEMORY
;
806 DEBUG(3,("Connect path is '%s' for service [%s]\n",s
,
807 lp_servicename(snum
)));
812 * New code to check if there's a share security descripter
813 * added from NT server manager. This is done after the
814 * smb.conf checks are done as we need a uid and token. JRA.
819 bool can_write
= False
;
821 can_write
= share_access_check(conn
->server_info
->ptok
,
822 lp_servicename(snum
),
826 if (!share_access_check(conn
->server_info
->ptok
,
827 lp_servicename(snum
),
829 /* No access, read or write. */
830 DEBUG(0,("make_connection: connection to %s "
831 "denied due to security "
833 lp_servicename(snum
)));
835 *pstatus
= NT_STATUS_ACCESS_DENIED
;
838 conn
->read_only
= True
;
842 /* Initialise VFS function pointers */
844 if (!smbd_vfs_init(conn
)) {
845 DEBUG(0, ("vfs_init failed for service %s\n",
846 lp_servicename(snum
)));
848 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
853 * If widelinks are disallowed we need to canonicalise the connect
854 * path here to ensure we don't have any symlinks in the
855 * connectpath. We will be checking all paths on this connection are
856 * below this directory. We must do this after the VFS init as we
857 * depend on the realpath() pointer in the vfs table. JRA.
859 if (!lp_widelinks(snum
)) {
860 if (!canonicalize_connect_path(conn
)) {
861 DEBUG(0, ("canonicalize_connect_path failed "
862 "for service %s, path %s\n",
863 lp_servicename(snum
),
866 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
871 if ((!conn
->printer
) && (!conn
->ipc
)) {
872 conn
->notify_ctx
= notify_init(conn
, server_id_self(),
873 smbd_messaging_context(),
874 smbd_event_context(),
878 /* ROOT Activities: */
880 * Enforce the max connections parameter.
883 if ((lp_max_connections(snum
) > 0)
884 && (count_current_connections(lp_servicename(SNUM(conn
)), True
) >=
885 lp_max_connections(snum
))) {
887 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
888 lp_max_connections(snum
), lp_servicename(snum
)));
890 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
895 * Get us an entry in the connections db
897 if (!claim_connection(conn
, lp_servicename(snum
), 0)) {
898 DEBUG(1, ("Could not store connections entry\n"));
900 *pstatus
= NT_STATUS_INTERNAL_DB_ERROR
;
904 /* Preexecs are done here as they might make the dir we are to ChDir
906 /* execute any "root preexec = " line */
907 if (*lp_rootpreexec(snum
)) {
908 char *cmd
= talloc_sub_advanced(talloc_tos(),
909 lp_servicename(SNUM(conn
)),
910 conn
->server_info
->unix_name
,
912 conn
->server_info
->utok
.gid
,
913 conn
->server_info
->sanitized_username
,
914 pdb_get_domain(conn
->server_info
->sam_account
),
915 lp_rootpreexec(snum
));
916 DEBUG(5,("cmd=%s\n",cmd
));
917 ret
= smbrun(cmd
,NULL
);
919 if (ret
!= 0 && lp_rootpreexec_close(snum
)) {
920 DEBUG(1,("root preexec gave %d - failing "
921 "connection\n", ret
));
922 yield_connection(conn
, lp_servicename(snum
));
924 *pstatus
= NT_STATUS_ACCESS_DENIED
;
929 /* USER Activites: */
930 if (!change_to_user(conn
, conn
->vuid
)) {
931 /* No point continuing if they fail the basic checks */
932 DEBUG(0,("Can't become connected user!\n"));
933 yield_connection(conn
, lp_servicename(snum
));
935 *pstatus
= NT_STATUS_LOGON_FAILURE
;
939 /* Remember that a different vuid can connect later without these
942 /* Preexecs are done here as they might make the dir we are to ChDir
945 /* execute any "preexec = " line */
946 if (*lp_preexec(snum
)) {
947 char *cmd
= talloc_sub_advanced(talloc_tos(),
948 lp_servicename(SNUM(conn
)),
949 conn
->server_info
->unix_name
,
951 conn
->server_info
->utok
.gid
,
952 conn
->server_info
->sanitized_username
,
953 pdb_get_domain(conn
->server_info
->sam_account
),
955 ret
= smbrun(cmd
,NULL
);
957 if (ret
!= 0 && lp_preexec_close(snum
)) {
958 DEBUG(1,("preexec gave %d - failing connection\n",
960 *pstatus
= NT_STATUS_ACCESS_DENIED
;
965 #ifdef WITH_FAKE_KASERVER
966 if (lp_afs_share(snum
)) {
971 /* Add veto/hide lists */
972 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
973 set_namearray( &conn
->veto_list
, lp_veto_files(snum
));
974 set_namearray( &conn
->hide_list
, lp_hide_files(snum
));
975 set_namearray( &conn
->veto_oplock_list
, lp_veto_oplocks(snum
));
976 set_namearray( &conn
->aio_write_behind_list
,
977 lp_aio_write_behind(snum
));
980 /* Invoke VFS make connection hook - do this before the VFS_STAT call
981 to allow any filesystems needing user credentials to initialize
984 if (SMB_VFS_CONNECT(conn
, lp_servicename(snum
),
985 conn
->server_info
->unix_name
) < 0) {
986 DEBUG(0,("make_connection: VFS make connection failed!\n"));
987 *pstatus
= NT_STATUS_UNSUCCESSFUL
;
991 /* Any error exit after here needs to call the disconnect hook. */
992 on_err_call_dis_hook
= true;
994 /* win2000 does not check the permissions on the directory
995 during the tree connect, instead relying on permission
996 check during individual operations. To match this behaviour
997 I have disabled this chdir check (tridge) */
998 /* the alternative is just to check the directory exists */
999 if ((ret
= SMB_VFS_STAT(conn
, conn
->connectpath
, &st
)) != 0 ||
1000 !S_ISDIR(st
.st_mode
)) {
1001 if (ret
== 0 && !S_ISDIR(st
.st_mode
)) {
1002 DEBUG(0,("'%s' is not a directory, when connecting to "
1003 "[%s]\n", conn
->connectpath
,
1004 lp_servicename(snum
)));
1006 DEBUG(0,("'%s' does not exist or permission denied "
1007 "when connecting to [%s] Error was %s\n",
1008 conn
->connectpath
, lp_servicename(snum
),
1011 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
1015 string_set(&conn
->origpath
,conn
->connectpath
);
1017 #if SOFTLINK_OPTIMISATION
1018 /* resolve any soft links early if possible */
1019 if (vfs_ChDir(conn
,conn
->connectpath
) == 0) {
1020 TALLOC_CTX
*ctx
= talloc_tos();
1021 char *s
= vfs_GetWd(ctx
,s
);
1023 *status
= map_nt_error_from_unix(errno
);
1026 if (!set_conn_connectpath(conn
,s
)) {
1027 *status
= NT_STATUS_NO_MEMORY
;
1030 vfs_ChDir(conn
,conn
->connectpath
);
1034 /* Figure out the characteristics of the underlying filesystem. This
1035 * assumes that all the filesystem mounted withing a share path have
1036 * the same characteristics, which is likely but not guaranteed.
1039 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
);
1042 * Print out the 'connected as' stuff here as we need
1043 * to know the effective uid and gid we will be using
1044 * (at least initially).
1047 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
1048 dbgtext( "%s (%s) ", get_remote_machine_name(),
1049 conn
->client_address
);
1050 dbgtext( "%s", srv_is_signing_active() ? "signed " : "");
1051 dbgtext( "connect to service %s ", lp_servicename(snum
) );
1052 dbgtext( "initially as user %s ",
1053 conn
->server_info
->unix_name
);
1054 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1055 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1058 /* we've finished with the user stuff - go back to root */
1059 change_to_root_user();
1064 change_to_root_user();
1065 if (on_err_call_dis_hook
) {
1066 /* Call VFS disconnect hook */
1067 SMB_VFS_DISCONNECT(conn
);
1069 yield_connection(conn
, lp_servicename(snum
));
1074 /****************************************************************************
1075 Make a connection to a service.
1078 ****************************************************************************/
1080 connection_struct
*make_connection(const char *service_in
, DATA_BLOB password
,
1081 const char *pdev
, uint16 vuid
,
1085 user_struct
*vuser
= NULL
;
1089 char addr
[INET6_ADDRSTRLEN
];
1093 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1095 if (!non_root_mode() && (euid
= geteuid()) != 0) {
1096 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1097 "(%u)\n", (unsigned int)euid
));
1098 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1101 if (conn_num_open() > 2047) {
1102 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1106 if(lp_security() != SEC_SHARE
) {
1107 vuser
= get_valid_user_struct(vuid
);
1109 DEBUG(1,("make_connection: refusing to connect with "
1110 "no session setup\n"));
1111 *status
= NT_STATUS_ACCESS_DENIED
;
1116 /* Logic to try and connect to the correct [homes] share, preferably
1117 without too many getpwnam() lookups. This is particulary nasty for
1118 winbind usernames, where the share name isn't the same as unix
1121 The snum of the homes share is stored on the vuser at session setup
1125 if (strequal(service_in
,HOMES_NAME
)) {
1126 if(lp_security() != SEC_SHARE
) {
1127 DATA_BLOB no_pw
= data_blob_null
;
1128 if (vuser
->homes_snum
== -1) {
1129 DEBUG(2, ("[homes] share not available for "
1130 "this user because it was not found "
1131 "or created at session setup "
1133 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1136 DEBUG(5, ("making a connection to [homes] service "
1137 "created at session setup time\n"));
1138 return make_connection_snum(vuser
->homes_snum
,
1142 /* Security = share. Try with
1143 * current_user_info.smb_name as the username. */
1144 if (*current_user_info
.smb_name
) {
1145 fstring unix_username
;
1146 fstrcpy(unix_username
,
1147 current_user_info
.smb_name
);
1148 map_username(unix_username
);
1149 snum
= find_service(unix_username
);
1152 DEBUG(5, ("making a connection to 'homes' "
1153 "service %s based on "
1154 "security=share\n", service_in
));
1155 return make_connection_snum(snum
, NULL
,
1160 } else if ((lp_security() != SEC_SHARE
) && (vuser
->homes_snum
!= -1)
1161 && strequal(service_in
,
1162 lp_servicename(vuser
->homes_snum
))) {
1163 DATA_BLOB no_pw
= data_blob_null
;
1164 DEBUG(5, ("making a connection to 'homes' service [%s] "
1165 "created at session setup time\n", service_in
));
1166 return make_connection_snum(vuser
->homes_snum
,
1171 fstrcpy(service
, service_in
);
1173 strlower_m(service
);
1175 snum
= find_service(service
);
1178 if (strequal(service
,"IPC$") ||
1179 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1180 DEBUG(3,("refusing IPC connection to %s\n", service
));
1181 *status
= NT_STATUS_ACCESS_DENIED
;
1185 DEBUG(0,("%s (%s) couldn't find service %s\n",
1186 get_remote_machine_name(),
1187 client_addr(get_client_fd(),addr
,sizeof(addr
)),
1189 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1193 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1194 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum
) != '\0')) {
1195 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1196 "(pointing to %s)\n",
1197 service
, lp_msdfs_proxy(snum
)));
1198 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1202 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1204 return make_connection_snum(snum
, vuser
,
1209 /****************************************************************************
1211 ****************************************************************************/
1213 void close_cnum(connection_struct
*conn
, uint16 vuid
)
1215 file_close_conn(conn
);
1217 if (!IS_IPC(conn
)) {
1218 dptr_closecnum(conn
);
1221 change_to_root_user();
1223 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1224 get_remote_machine_name(),
1225 conn
->client_address
,
1226 lp_servicename(SNUM(conn
))));
1228 /* Call VFS disconnect hook */
1229 SMB_VFS_DISCONNECT(conn
);
1231 yield_connection(conn
, lp_servicename(SNUM(conn
)));
1233 /* make sure we leave the directory available for unmount */
1234 vfs_ChDir(conn
, "/");
1236 /* execute any "postexec = " line */
1237 if (*lp_postexec(SNUM(conn
)) &&
1238 change_to_user(conn
, vuid
)) {
1239 char *cmd
= talloc_sub_advanced(talloc_tos(),
1240 lp_servicename(SNUM(conn
)),
1241 conn
->server_info
->unix_name
,
1243 conn
->server_info
->utok
.gid
,
1244 conn
->server_info
->sanitized_username
,
1245 pdb_get_domain(conn
->server_info
->sam_account
),
1246 lp_postexec(SNUM(conn
)));
1249 change_to_root_user();
1252 change_to_root_user();
1253 /* execute any "root postexec = " line */
1254 if (*lp_rootpostexec(SNUM(conn
))) {
1255 char *cmd
= talloc_sub_advanced(talloc_tos(),
1256 lp_servicename(SNUM(conn
)),
1257 conn
->server_info
->unix_name
,
1259 conn
->server_info
->utok
.gid
,
1260 conn
->server_info
->sanitized_username
,
1261 pdb_get_domain(conn
->server_info
->sam_account
),
1262 lp_rootpostexec(SNUM(conn
)));