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"
22 #include "../librpc/gen_ndr/netlogon.h"
23 #include "../libcli/security/security.h"
25 extern userdom_struct current_user_info
;
27 static bool canonicalize_connect_path(connection_struct
*conn
)
29 #ifdef REALPATH_TAKES_NULL
31 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
,NULL
);
35 ret
= set_conn_connectpath(conn
,resolved_name
);
36 SAFE_FREE(resolved_name
);
39 char resolved_name_buf
[PATH_MAX
+1];
40 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
,resolved_name_buf
);
44 return set_conn_connectpath(conn
,resolved_name
);
45 #endif /* REALPATH_TAKES_NULL */
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 static int load_registry_service(const char *servicename
)
230 if (!lp_registry_shares()) {
234 if ((servicename
== NULL
) || (*servicename
== '\0')) {
238 if (strequal(servicename
, GLOBAL_NAME
)) {
242 if (!process_registry_service(servicename
)) {
246 return lp_servicenumber(servicename
);
249 void load_registry_shares(void)
251 DEBUG(8, ("load_registry_shares()\n"));
252 if (!lp_registry_shares()) {
256 process_registry_shares();
261 /****************************************************************************
262 Add a home service. Returns the new service number or -1 if fail.
263 ****************************************************************************/
265 int add_home_service(const char *service
, const char *username
, const char *homedir
)
269 if (!service
|| !homedir
|| homedir
[0] == '\0')
272 if ((iHomeService
= lp_servicenumber(HOMES_NAME
)) < 0) {
273 if ((iHomeService
= load_registry_service(HOMES_NAME
)) < 0) {
279 * If this is a winbindd provided username, remove
280 * the domain component before adding the service.
281 * Log a warning if the "path=" parameter does not
282 * include any macros.
286 const char *p
= strchr(service
,*lp_winbind_separator());
288 /* We only want the 'user' part of the string */
294 if (!lp_add_home(service
, iHomeService
, username
, homedir
)) {
298 return lp_servicenumber(service
);
303 * Find a service entry.
305 * @param service is modified (to canonical form??)
308 int find_service(fstring service
)
312 all_string_sub(service
,"\\","/",0);
314 iService
= lp_servicenumber(service
);
316 /* now handle the special case of a home directory */
318 char *phome_dir
= get_user_home_dir(talloc_tos(), service
);
322 * Try mapping the servicename, it may
323 * be a Windows to unix mapped user name.
325 if(map_username(service
))
326 phome_dir
= get_user_home_dir(
327 talloc_tos(), service
);
330 DEBUG(3,("checking for home directory %s gave %s\n",service
,
331 phome_dir
?phome_dir
:"(NULL)"));
333 iService
= add_home_service(service
,service
/* 'username' */, phome_dir
);
336 /* If we still don't have a service, attempt to add it as a printer. */
340 if ((iPrinterService
= lp_servicenumber(PRINTERS_NAME
)) < 0) {
341 iPrinterService
= load_registry_service(PRINTERS_NAME
);
343 if (iPrinterService
>= 0) {
344 DEBUG(3,("checking whether %s is a valid printer name...\n", service
));
345 if (pcap_printername_ok(service
)) {
346 DEBUG(3,("%s is a valid printer name\n", service
));
347 DEBUG(3,("adding %s as a printer service\n", service
));
348 lp_add_printer(service
, iPrinterService
);
349 iService
= lp_servicenumber(service
);
351 DEBUG(0,("failed to add %s as a printer service!\n", service
));
354 DEBUG(3,("%s is not a valid printer name\n", service
));
359 /* Check for default vfs service? Unsure whether to implement this */
364 iService
= load_registry_service(service
);
367 /* Is it a usershare service ? */
368 if (iService
< 0 && *lp_usershare_path()) {
369 /* Ensure the name is canonicalized. */
371 iService
= load_usershare_service(service
);
374 /* just possibly it's a default service? */
376 char *pdefservice
= lp_defaultservice();
377 if (pdefservice
&& *pdefservice
&& !strequal(pdefservice
,service
) && !strstr_m(service
,"..")) {
379 * We need to do a local copy here as lp_defaultservice()
380 * returns one of the rotating lp_string buffers that
381 * could get overwritten by the recursive find_service() call
382 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
384 char *defservice
= SMB_STRDUP(pdefservice
);
390 /* Disallow anything except explicit share names. */
391 if (strequal(defservice
,HOMES_NAME
) ||
392 strequal(defservice
, PRINTERS_NAME
) ||
393 strequal(defservice
, "IPC$")) {
394 SAFE_FREE(defservice
);
398 iService
= find_service(defservice
);
400 all_string_sub(service
, "_","/",0);
401 iService
= lp_add_service(service
, iService
);
403 SAFE_FREE(defservice
);
408 if (!VALID_SNUM(iService
)) {
409 DEBUG(0,("Invalid snum %d for %s\n",iService
, service
));
417 DEBUG(3,("find_service() failed to find service %s\n", service
));
423 /****************************************************************************
424 do some basic sainity checks on the share.
425 This function modifies dev, ecode.
426 ****************************************************************************/
428 static NTSTATUS
share_sanity_checks(struct client_address
*client_id
, int snum
,
431 if (!lp_snum_ok(snum
) ||
432 !allow_access(lp_hostsdeny(snum
), lp_hostsallow(snum
),
433 client_id
->name
, client_id
->addr
)) {
434 return NT_STATUS_ACCESS_DENIED
;
437 if (dev
[0] == '?' || !dev
[0]) {
438 if (lp_print_ok(snum
)) {
439 fstrcpy(dev
,"LPT1:");
440 } else if (strequal(lp_fstype(snum
), "IPC")) {
449 if (lp_print_ok(snum
)) {
450 if (!strequal(dev
, "LPT1:")) {
451 return NT_STATUS_BAD_DEVICE_TYPE
;
453 } else if (strequal(lp_fstype(snum
), "IPC")) {
454 if (!strequal(dev
, "IPC")) {
455 return NT_STATUS_BAD_DEVICE_TYPE
;
457 } else if (!strequal(dev
, "A:")) {
458 return NT_STATUS_BAD_DEVICE_TYPE
;
461 /* Behave as a printer if we are supposed to */
462 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
463 fstrcpy(dev
, "LPT1:");
470 * Go through lookup_name etc to find the force'd group.
472 * Create a new token from src_token, replacing the primary group sid with the
476 static NTSTATUS
find_forced_group(bool force_user
,
477 int snum
, const char *username
,
478 struct dom_sid
*pgroup_sid
,
481 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
482 TALLOC_CTX
*frame
= talloc_stackframe();
483 struct dom_sid group_sid
;
484 enum lsa_SidType type
;
486 bool user_must_be_member
= False
;
489 groupname
= talloc_strdup(talloc_tos(), lp_force_group(snum
));
490 if (groupname
== NULL
) {
491 DEBUG(1, ("talloc_strdup failed\n"));
492 result
= NT_STATUS_NO_MEMORY
;
496 if (groupname
[0] == '+') {
497 user_must_be_member
= True
;
501 groupname
= talloc_string_sub(talloc_tos(), groupname
,
502 "%S", lp_servicename(snum
));
503 if (groupname
== NULL
) {
504 DEBUG(1, ("talloc_string_sub failed\n"));
505 result
= NT_STATUS_NO_MEMORY
;
509 if (!lookup_name_smbconf(talloc_tos(), groupname
,
510 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
511 NULL
, NULL
, &group_sid
, &type
)) {
512 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
517 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
518 (type
!= SID_NAME_WKN_GRP
)) {
519 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
520 sid_type_lookup(type
)));
524 if (!sid_to_gid(&group_sid
, &gid
)) {
525 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
526 sid_string_dbg(&group_sid
), groupname
));
531 * If the user has been forced and the forced group starts with a '+',
532 * then we only set the group to be the forced group if the forced
533 * user is a member of that group. Otherwise, the meaning of the '+'
537 if (force_user
&& user_must_be_member
) {
538 if (user_in_group_sid(username
, &group_sid
)) {
539 sid_copy(pgroup_sid
, &group_sid
);
541 DEBUG(3,("Forced group %s for member %s\n",
542 groupname
, username
));
544 DEBUG(0,("find_forced_group: forced user %s is not a member "
545 "of forced group %s. Disallowing access.\n",
546 username
, groupname
));
547 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
551 sid_copy(pgroup_sid
, &group_sid
);
553 DEBUG(3,("Forced group %s\n", groupname
));
556 result
= NT_STATUS_OK
;
562 /****************************************************************************
563 Create an auth_serversupplied_info structure for a connection_struct
564 ****************************************************************************/
566 static NTSTATUS
create_connection_server_info(struct smbd_server_connection
*sconn
,
567 TALLOC_CTX
*mem_ctx
, int snum
,
568 struct auth_serversupplied_info
*vuid_serverinfo
,
570 struct auth_serversupplied_info
**presult
)
572 if (lp_guest_only(snum
)) {
573 return make_server_info_guest(mem_ctx
, presult
);
576 if (vuid_serverinfo
!= NULL
) {
578 struct auth_serversupplied_info
*result
;
581 * This is the normal security != share case where we have a
582 * valid vuid from the session setup. */
584 if (vuid_serverinfo
->guest
) {
585 if (!lp_guest_ok(snum
)) {
586 DEBUG(2, ("guest user (from session setup) "
587 "not permitted to access this share "
588 "(%s)\n", lp_servicename(snum
)));
589 return NT_STATUS_ACCESS_DENIED
;
592 if (!user_ok_token(vuid_serverinfo
->unix_name
,
593 vuid_serverinfo
->info3
->base
.domain
.string
,
594 vuid_serverinfo
->ptok
, snum
)) {
595 DEBUG(2, ("user '%s' (from session setup) not "
596 "permitted to access this share "
598 vuid_serverinfo
->unix_name
,
599 lp_servicename(snum
)));
600 return NT_STATUS_ACCESS_DENIED
;
604 result
= copy_serverinfo(mem_ctx
, vuid_serverinfo
);
605 if (result
== NULL
) {
606 return NT_STATUS_NO_MEMORY
;
613 if (lp_security() == SEC_SHARE
) {
618 /* add the sharename as a possible user name if we
619 are in share mode security */
621 add_session_user(sconn
, lp_servicename(snum
));
623 /* shall we let them in? */
625 if (!authorise_login(sconn
, snum
,user
,password
,&guest
)) {
626 DEBUG( 2, ( "Invalid username/password for [%s]\n",
627 lp_servicename(snum
)) );
628 return NT_STATUS_WRONG_PASSWORD
;
631 return make_serverinfo_from_username(mem_ctx
, user
, guest
,
635 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
636 return NT_STATUS_ACCESS_DENIED
;
640 /****************************************************************************
641 Make a connection, given the snum to connect to, and the vuser of the
642 connecting user if appropriate.
643 ****************************************************************************/
645 connection_struct
*make_connection_snum(struct smbd_server_connection
*sconn
,
646 int snum
, user_struct
*vuser
,
651 connection_struct
*conn
= NULL
;
652 struct smb_filename
*smb_fname_cpath
= NULL
;
655 bool on_err_call_dis_hook
= false;
656 bool claimed_connection
= false;
663 *pstatus
= share_sanity_checks(&sconn
->client_id
, snum
, dev
);
664 if (NT_STATUS_IS_ERR(*pstatus
)) {
668 conn
= conn_new(sconn
);
670 DEBUG(0,("Couldn't find free connection.\n"));
671 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
675 conn
->params
->service
= snum
;
677 status
= create_connection_server_info(sconn
,
678 conn
, snum
, vuser
? vuser
->server_info
: NULL
, password
,
681 if (!NT_STATUS_IS_OK(status
)) {
682 DEBUG(1, ("create_connection_server_info failed: %s\n",
688 if ((lp_guest_only(snum
)) || (lp_security() == SEC_SHARE
)) {
689 conn
->force_user
= true;
692 add_session_user(sconn
, conn
->server_info
->unix_name
);
694 conn
->num_files_open
= 0;
695 conn
->lastused
= conn
->lastused_count
= time(NULL
);
697 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
698 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
699 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
701 /* Case options for the share. */
702 if (lp_casesensitive(snum
) == Auto
) {
703 /* We will be setting this per packet. Set to be case
704 * insensitive for now. */
705 conn
->case_sensitive
= False
;
707 conn
->case_sensitive
= (bool)lp_casesensitive(snum
);
710 conn
->case_preserve
= lp_preservecase(snum
);
711 conn
->short_case_preserve
= lp_shortpreservecase(snum
);
713 conn
->encrypt_level
= lp_smb_encrypt(snum
);
715 conn
->veto_list
= NULL
;
716 conn
->hide_list
= NULL
;
717 conn
->veto_oplock_list
= NULL
;
718 conn
->aio_write_behind_list
= NULL
;
720 conn
->read_only
= lp_readonly(SNUM(conn
));
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
));
735 *pstatus
= NT_STATUS_NO_MEMORY
;
739 status
= make_serverinfo_from_username(
740 conn
, fuser
, conn
->server_info
->guest
,
742 if (!NT_STATUS_IS_OK(status
)) {
747 TALLOC_FREE(conn
->server_info
);
748 conn
->server_info
= forced_serverinfo
;
750 conn
->force_user
= True
;
751 DEBUG(3,("Forced user %s\n", fuser
));
755 * If force group is true, then override
756 * any groupid stored for the connecting user.
759 if (*lp_force_group(snum
)) {
761 status
= find_forced_group(
762 conn
->force_user
, snum
, conn
->server_info
->unix_name
,
763 &conn
->server_info
->ptok
->sids
[1],
764 &conn
->server_info
->utok
.gid
);
766 if (!NT_STATUS_IS_OK(status
)) {
772 * We need to cache this gid, to use within
773 * change_to_user() separately from the conn->server_info
774 * struct. We only use conn->server_info directly if
775 * "force_user" was set.
777 conn
->force_group_gid
= conn
->server_info
->utok
.gid
;
780 conn
->vuid
= (vuser
!= NULL
) ? vuser
->vuid
: UID_FIELD_INVALID
;
783 char *s
= talloc_sub_advanced(talloc_tos(),
784 lp_servicename(SNUM(conn
)),
785 conn
->server_info
->unix_name
,
787 conn
->server_info
->utok
.gid
,
788 conn
->server_info
->sanitized_username
,
789 conn
->server_info
->info3
->base
.domain
.string
,
792 *pstatus
= NT_STATUS_NO_MEMORY
;
796 if (!set_conn_connectpath(conn
,s
)) {
798 *pstatus
= NT_STATUS_NO_MEMORY
;
801 DEBUG(3,("Connect path is '%s' for service [%s]\n",s
,
802 lp_servicename(snum
)));
807 * New code to check if there's a share security descripter
808 * added from NT server manager. This is done after the
809 * smb.conf checks are done as we need a uid and token. JRA.
814 bool can_write
= False
;
816 can_write
= share_access_check(conn
->server_info
->ptok
,
817 lp_servicename(snum
),
821 if (!share_access_check(conn
->server_info
->ptok
,
822 lp_servicename(snum
),
824 /* No access, read or write. */
825 DEBUG(0,("make_connection: connection to %s "
826 "denied due to security "
828 lp_servicename(snum
)));
829 *pstatus
= NT_STATUS_ACCESS_DENIED
;
832 conn
->read_only
= True
;
836 /* Initialise VFS function pointers */
838 if (!smbd_vfs_init(conn
)) {
839 DEBUG(0, ("vfs_init failed for service %s\n",
840 lp_servicename(snum
)));
841 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
845 /* ROOT Activities: */
846 /* explicitly check widelinks here so that we can correctly warn
848 widelinks_warning(snum
);
851 * Enforce the max connections parameter.
854 if ((lp_max_connections(snum
) > 0)
855 && (count_current_connections(lp_servicename(SNUM(conn
)), True
) >=
856 lp_max_connections(snum
))) {
858 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
859 lp_max_connections(snum
), lp_servicename(snum
)));
860 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
865 * Get us an entry in the connections db
867 if (!claim_connection(conn
, lp_servicename(snum
))) {
868 DEBUG(1, ("Could not store connections entry\n"));
869 *pstatus
= NT_STATUS_INTERNAL_DB_ERROR
;
872 claimed_connection
= true;
874 /* Invoke VFS make connection hook - this must be the first
875 filesystem operation that we do. */
877 if (SMB_VFS_CONNECT(conn
, lp_servicename(snum
),
878 conn
->server_info
->unix_name
) < 0) {
879 DEBUG(0,("make_connection: VFS make connection failed!\n"));
880 *pstatus
= NT_STATUS_UNSUCCESSFUL
;
884 /* Any error exit after here needs to call the disconnect hook. */
885 on_err_call_dis_hook
= true;
887 if ((!conn
->printer
) && (!conn
->ipc
)) {
888 conn
->notify_ctx
= notify_init(conn
,
889 sconn_server_id(sconn
),
891 smbd_event_context(),
896 * Fix compatibility issue pointed out by Volker.
897 * We pass the conn->connectpath to the preexec
898 * scripts as a parameter, so attempt to canonicalize
899 * it here before calling the preexec scripts.
900 * We ignore errors here, as it is possible that
901 * the conn->connectpath doesn't exist yet and
902 * the preexec scripts will create them.
905 (void)canonicalize_connect_path(conn
);
907 /* Preexecs are done here as they might make the dir we are to ChDir
909 /* execute any "root preexec = " line */
910 if (*lp_rootpreexec(snum
)) {
911 char *cmd
= talloc_sub_advanced(talloc_tos(),
912 lp_servicename(SNUM(conn
)),
913 conn
->server_info
->unix_name
,
915 conn
->server_info
->utok
.gid
,
916 conn
->server_info
->sanitized_username
,
917 conn
->server_info
->info3
->base
.domain
.string
,
918 lp_rootpreexec(snum
));
919 DEBUG(5,("cmd=%s\n",cmd
));
920 ret
= smbrun(cmd
,NULL
);
922 if (ret
!= 0 && lp_rootpreexec_close(snum
)) {
923 DEBUG(1,("root preexec gave %d - failing "
924 "connection\n", ret
));
925 *pstatus
= NT_STATUS_ACCESS_DENIED
;
930 /* USER Activites: */
931 if (!change_to_user(conn
, conn
->vuid
)) {
932 /* No point continuing if they fail the basic checks */
933 DEBUG(0,("Can't become connected user!\n"));
934 *pstatus
= NT_STATUS_LOGON_FAILURE
;
941 /* Remember that a different vuid can connect later without these
944 /* Preexecs are done here as they might make the dir we are to ChDir
947 /* execute any "preexec = " line */
948 if (*lp_preexec(snum
)) {
949 char *cmd
= talloc_sub_advanced(talloc_tos(),
950 lp_servicename(SNUM(conn
)),
951 conn
->server_info
->unix_name
,
953 conn
->server_info
->utok
.gid
,
954 conn
->server_info
->sanitized_username
,
955 conn
->server_info
->info3
->base
.domain
.string
,
957 ret
= smbrun(cmd
,NULL
);
959 if (ret
!= 0 && lp_preexec_close(snum
)) {
960 DEBUG(1,("preexec gave %d - failing connection\n",
962 *pstatus
= NT_STATUS_ACCESS_DENIED
;
967 #ifdef WITH_FAKE_KASERVER
968 if (lp_afs_share(snum
)) {
974 * we've finished with the user stuff - go back to root
975 * so the SMB_VFS_STAT call will only fail on path errors,
976 * not permission problems.
978 change_to_root_user();
979 /* ROOT Activites: */
982 * If widelinks are disallowed we need to canonicalise the connect
983 * path here to ensure we don't have any symlinks in the
984 * connectpath. We will be checking all paths on this connection are
985 * below this directory. We must do this after the VFS init as we
986 * depend on the realpath() pointer in the vfs table. JRA.
988 if (!lp_widelinks(snum
)) {
989 if (!canonicalize_connect_path(conn
)) {
990 DEBUG(0, ("canonicalize_connect_path failed "
991 "for service %s, path %s\n",
992 lp_servicename(snum
),
994 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
999 /* Add veto/hide lists */
1000 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
1001 set_namearray( &conn
->veto_list
, lp_veto_files(snum
));
1002 set_namearray( &conn
->hide_list
, lp_hide_files(snum
));
1003 set_namearray( &conn
->veto_oplock_list
, lp_veto_oplocks(snum
));
1004 set_namearray( &conn
->aio_write_behind_list
,
1005 lp_aio_write_behind(snum
));
1007 status
= create_synthetic_smb_fname(talloc_tos(), conn
->connectpath
,
1008 NULL
, NULL
, &smb_fname_cpath
);
1009 if (!NT_STATUS_IS_OK(status
)) {
1014 /* win2000 does not check the permissions on the directory
1015 during the tree connect, instead relying on permission
1016 check during individual operations. To match this behaviour
1017 I have disabled this chdir check (tridge) */
1018 /* the alternative is just to check the directory exists */
1020 if ((ret
= SMB_VFS_STAT(conn
, smb_fname_cpath
)) != 0 ||
1021 !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
1022 if (ret
== 0 && !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
1023 DEBUG(0,("'%s' is not a directory, when connecting to "
1024 "[%s]\n", conn
->connectpath
,
1025 lp_servicename(snum
)));
1027 DEBUG(0,("'%s' does not exist or permission denied "
1028 "when connecting to [%s] Error was %s\n",
1029 conn
->connectpath
, lp_servicename(snum
),
1032 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
1035 conn
->base_share_dev
= smb_fname_cpath
->st
.st_ex_dev
;
1037 string_set(&conn
->origpath
,conn
->connectpath
);
1039 /* Figure out the characteristics of the underlying filesystem. This
1040 * assumes that all the filesystem mounted withing a share path have
1041 * the same characteristics, which is likely but not guaranteed.
1044 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
, &conn
->ts_res
);
1047 * Print out the 'connected as' stuff here as we need
1048 * to know the effective uid and gid we will be using
1049 * (at least initially).
1052 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
1053 dbgtext( "%s (%s) ", get_remote_machine_name(),
1054 conn
->sconn
->client_id
.addr
);
1055 dbgtext( "%s", srv_is_signing_active(sconn
) ? "signed " : "");
1056 dbgtext( "connect to service %s ", lp_servicename(snum
) );
1057 dbgtext( "initially as user %s ",
1058 conn
->server_info
->unix_name
);
1059 dbgtext( "(uid=%d, gid=%d) ", (int)effuid
, (int)effgid
);
1060 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1066 TALLOC_FREE(smb_fname_cpath
);
1067 /* We must exit this function as root. */
1068 if (geteuid() != 0) {
1069 change_to_root_user();
1071 if (on_err_call_dis_hook
) {
1072 /* Call VFS disconnect hook */
1073 SMB_VFS_DISCONNECT(conn
);
1075 if (claimed_connection
) {
1076 yield_connection(conn
, lp_servicename(snum
));
1084 /****************************************************************************
1085 Make a connection to a service.
1088 ****************************************************************************/
1090 connection_struct
*make_connection(struct smbd_server_connection
*sconn
,
1091 const char *service_in
, DATA_BLOB password
,
1092 const char *pdev
, uint16 vuid
,
1096 user_struct
*vuser
= NULL
;
1103 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1105 if (!non_root_mode() && (euid
= geteuid()) != 0) {
1106 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1107 "(%u)\n", (unsigned int)euid
));
1108 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1111 if (conn_num_open(sconn
) > 2047) {
1112 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1116 if(lp_security() != SEC_SHARE
) {
1117 vuser
= get_valid_user_struct(sconn
, vuid
);
1119 DEBUG(1,("make_connection: refusing to connect with "
1120 "no session setup\n"));
1121 *status
= NT_STATUS_ACCESS_DENIED
;
1126 /* Logic to try and connect to the correct [homes] share, preferably
1127 without too many getpwnam() lookups. This is particulary nasty for
1128 winbind usernames, where the share name isn't the same as unix
1131 The snum of the homes share is stored on the vuser at session setup
1135 if (strequal(service_in
,HOMES_NAME
)) {
1136 if(lp_security() != SEC_SHARE
) {
1137 DATA_BLOB no_pw
= data_blob_null
;
1138 if (vuser
->homes_snum
== -1) {
1139 DEBUG(2, ("[homes] share not available for "
1140 "this user because it was not found "
1141 "or created at session setup "
1143 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1146 DEBUG(5, ("making a connection to [homes] service "
1147 "created at session setup time\n"));
1148 return make_connection_snum(sconn
,
1153 /* Security = share. Try with
1154 * current_user_info.smb_name as the username. */
1155 if (*current_user_info
.smb_name
) {
1156 fstring unix_username
;
1157 fstrcpy(unix_username
,
1158 current_user_info
.smb_name
);
1159 map_username(unix_username
);
1160 snum
= find_service(unix_username
);
1163 DEBUG(5, ("making a connection to 'homes' "
1164 "service %s based on "
1165 "security=share\n", service_in
));
1166 return make_connection_snum(sconn
,
1172 } else if ((lp_security() != SEC_SHARE
) && (vuser
->homes_snum
!= -1)
1173 && strequal(service_in
,
1174 lp_servicename(vuser
->homes_snum
))) {
1175 DATA_BLOB no_pw
= data_blob_null
;
1176 DEBUG(5, ("making a connection to 'homes' service [%s] "
1177 "created at session setup time\n", service_in
));
1178 return make_connection_snum(sconn
,
1184 fstrcpy(service
, service_in
);
1186 strlower_m(service
);
1188 snum
= find_service(service
);
1191 if (strequal(service
,"IPC$") ||
1192 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1193 DEBUG(3,("refusing IPC connection to %s\n", service
));
1194 *status
= NT_STATUS_ACCESS_DENIED
;
1198 DEBUG(3,("%s (%s) couldn't find service %s\n",
1199 get_remote_machine_name(),
1200 tsocket_address_string(
1201 sconn
->remote_address
, talloc_tos()),
1203 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1207 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1208 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum
) != '\0')) {
1209 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1210 "(pointing to %s)\n",
1211 service
, lp_msdfs_proxy(snum
)));
1212 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1216 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1218 return make_connection_snum(sconn
, snum
, vuser
,
1223 /****************************************************************************
1225 ****************************************************************************/
1227 void close_cnum(connection_struct
*conn
, uint16 vuid
)
1229 file_close_conn(conn
);
1231 if (!IS_IPC(conn
)) {
1232 dptr_closecnum(conn
);
1235 change_to_root_user();
1237 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1238 get_remote_machine_name(),
1239 conn
->sconn
->client_id
.addr
,
1240 lp_servicename(SNUM(conn
))));
1242 /* Call VFS disconnect hook */
1243 SMB_VFS_DISCONNECT(conn
);
1245 yield_connection(conn
, lp_servicename(SNUM(conn
)));
1247 /* make sure we leave the directory available for unmount */
1248 vfs_ChDir(conn
, "/");
1250 /* execute any "postexec = " line */
1251 if (*lp_postexec(SNUM(conn
)) &&
1252 change_to_user(conn
, vuid
)) {
1253 char *cmd
= talloc_sub_advanced(talloc_tos(),
1254 lp_servicename(SNUM(conn
)),
1255 conn
->server_info
->unix_name
,
1257 conn
->server_info
->utok
.gid
,
1258 conn
->server_info
->sanitized_username
,
1259 conn
->server_info
->info3
->base
.domain
.string
,
1260 lp_postexec(SNUM(conn
)));
1263 change_to_root_user();
1266 change_to_root_user();
1267 /* execute any "root postexec = " line */
1268 if (*lp_rootpostexec(SNUM(conn
))) {
1269 char *cmd
= talloc_sub_advanced(talloc_tos(),
1270 lp_servicename(SNUM(conn
)),
1271 conn
->server_info
->unix_name
,
1273 conn
->server_info
->utok
.gid
,
1274 conn
->server_info
->sanitized_username
,
1275 conn
->server_info
->info3
->base
.domain
.string
,
1276 lp_rootpostexec(SNUM(conn
)));