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 /* Allocate for strlen + '\0' + possible leading '/' */
64 destname
= SMB_MALLOC(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(SNUM(conn
)), destname
));
165 string_set(&conn
->connectpath
, destname
);
170 /****************************************************************************
171 Load parameters specific to a connection/service.
172 ****************************************************************************/
174 bool set_current_service(connection_struct
*conn
, uint16 flags
, bool do_chdir
)
183 conn
->lastused_count
++;
188 vfs_ChDir(conn
,conn
->connectpath
) != 0 &&
189 vfs_ChDir(conn
,conn
->origpath
) != 0) {
190 DEBUG(((errno
!=EACCES
)?0:3),("chdir (%s) failed, reason: %s\n",
191 conn
->connectpath
, strerror(errno
)));
195 if ((conn
== last_conn
) && (last_flags
== flags
)) {
202 /* Obey the client case sensitivity requests - only for clients that support it. */
203 switch (lp_casesensitive(snum
)) {
206 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
207 enum remote_arch_types ra_type
= get_remote_arch();
208 if ((ra_type
!= RA_SAMBA
) && (ra_type
!= RA_CIFSFS
)) {
209 /* Client can't support per-packet case sensitive pathnames. */
210 conn
->case_sensitive
= False
;
212 conn
->case_sensitive
= !(flags
& FLAG_CASELESS_PATHNAMES
);
217 conn
->case_sensitive
= True
;
220 conn
->case_sensitive
= False
;
226 static int load_registry_service(const char *servicename
)
228 if (!lp_registry_shares()) {
232 if ((servicename
== NULL
) || (*servicename
== '\0')) {
236 if (strequal(servicename
, GLOBAL_NAME
)) {
240 if (!process_registry_service(servicename
)) {
244 return lp_servicenumber(servicename
);
247 void load_registry_shares(void)
249 DEBUG(8, ("load_registry_shares()\n"));
250 if (!lp_registry_shares()) {
254 process_registry_shares();
259 /****************************************************************************
260 Add a home service. Returns the new service number or -1 if fail.
261 ****************************************************************************/
263 int add_home_service(const char *service
, const char *username
, const char *homedir
)
267 if (!service
|| !homedir
|| homedir
[0] == '\0')
270 if ((iHomeService
= lp_servicenumber(HOMES_NAME
)) < 0) {
271 if ((iHomeService
= load_registry_service(HOMES_NAME
)) < 0) {
277 * If this is a winbindd provided username, remove
278 * the domain component before adding the service.
279 * Log a warning if the "path=" parameter does not
280 * include any macros.
284 const char *p
= strchr(service
,*lp_winbind_separator());
286 /* We only want the 'user' part of the string */
292 if (!lp_add_home(service
, iHomeService
, username
, homedir
)) {
296 return lp_servicenumber(service
);
301 * Find a service entry.
303 * @param service is modified (to canonical form??)
306 int find_service(fstring service
)
309 struct smbd_server_connection
*sconn
= smbd_server_conn
;
311 all_string_sub(service
,"\\","/",0);
313 iService
= lp_servicenumber(service
);
315 /* now handle the special case of a home directory */
317 char *phome_dir
= get_user_home_dir(talloc_tos(), service
);
321 * Try mapping the servicename, it may
322 * be a Windows to unix mapped user name.
324 if(map_username(sconn
, service
))
325 phome_dir
= get_user_home_dir(
326 talloc_tos(), service
);
329 DEBUG(3,("checking for home directory %s gave %s\n",service
,
330 phome_dir
?phome_dir
:"(NULL)"));
332 iService
= add_home_service(service
,service
/* 'username' */, phome_dir
);
335 /* If we still don't have a service, attempt to add it as a printer. */
339 if ((iPrinterService
= lp_servicenumber(PRINTERS_NAME
)) < 0) {
340 iPrinterService
= load_registry_service(PRINTERS_NAME
);
342 if (iPrinterService
>= 0) {
343 DEBUG(3,("checking whether %s is a valid printer name...\n", service
));
344 if (pcap_printername_ok(service
)) {
345 DEBUG(3,("%s is a valid printer name\n", service
));
346 DEBUG(3,("adding %s as a printer service\n", service
));
347 lp_add_printer(service
, iPrinterService
);
348 iService
= lp_servicenumber(service
);
350 DEBUG(0,("failed to add %s as a printer service!\n", service
));
353 DEBUG(3,("%s is not a valid printer name\n", service
));
358 /* Check for default vfs service? Unsure whether to implement this */
363 iService
= load_registry_service(service
);
366 /* Is it a usershare service ? */
367 if (iService
< 0 && *lp_usershare_path()) {
368 /* Ensure the name is canonicalized. */
370 iService
= load_usershare_service(service
);
373 /* just possibly it's a default service? */
375 char *pdefservice
= lp_defaultservice();
376 if (pdefservice
&& *pdefservice
&& !strequal(pdefservice
,service
) && !strstr_m(service
,"..")) {
378 * We need to do a local copy here as lp_defaultservice()
379 * returns one of the rotating lp_string buffers that
380 * could get overwritten by the recursive find_service() call
381 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
383 char *defservice
= SMB_STRDUP(pdefservice
);
389 /* Disallow anything except explicit share names. */
390 if (strequal(defservice
,HOMES_NAME
) ||
391 strequal(defservice
, PRINTERS_NAME
) ||
392 strequal(defservice
, "IPC$")) {
393 SAFE_FREE(defservice
);
397 iService
= find_service(defservice
);
399 all_string_sub(service
, "_","/",0);
400 iService
= lp_add_service(service
, iService
);
402 SAFE_FREE(defservice
);
407 if (!VALID_SNUM(iService
)) {
408 DEBUG(0,("Invalid snum %d for %s\n",iService
, service
));
416 DEBUG(3,("find_service() failed to find service %s\n", service
));
422 /****************************************************************************
423 do some basic sainity checks on the share.
424 This function modifies dev, ecode.
425 ****************************************************************************/
427 static NTSTATUS
share_sanity_checks(int snum
, fstring dev
)
430 if (!lp_snum_ok(snum
) ||
431 !check_access(smbd_server_fd(),
432 lp_hostsallow(snum
), lp_hostsdeny(snum
))) {
433 return NT_STATUS_ACCESS_DENIED
;
436 if (dev
[0] == '?' || !dev
[0]) {
437 if (lp_print_ok(snum
)) {
438 fstrcpy(dev
,"LPT1:");
439 } else if (strequal(lp_fstype(snum
), "IPC")) {
448 if (lp_print_ok(snum
)) {
449 if (!strequal(dev
, "LPT1:")) {
450 return NT_STATUS_BAD_DEVICE_TYPE
;
452 } else if (strequal(lp_fstype(snum
), "IPC")) {
453 if (!strequal(dev
, "IPC")) {
454 return NT_STATUS_BAD_DEVICE_TYPE
;
456 } else if (!strequal(dev
, "A:")) {
457 return NT_STATUS_BAD_DEVICE_TYPE
;
460 /* Behave as a printer if we are supposed to */
461 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
462 fstrcpy(dev
, "LPT1:");
469 * Go through lookup_name etc to find the force'd group.
471 * Create a new token from src_token, replacing the primary group sid with the
475 static NTSTATUS
find_forced_group(bool force_user
,
476 int snum
, const char *username
,
480 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
481 TALLOC_CTX
*frame
= talloc_stackframe();
483 enum lsa_SidType type
;
485 bool user_must_be_member
= False
;
488 groupname
= talloc_strdup(talloc_tos(), lp_force_group(snum
));
489 if (groupname
== NULL
) {
490 DEBUG(1, ("talloc_strdup failed\n"));
491 result
= NT_STATUS_NO_MEMORY
;
495 if (groupname
[0] == '+') {
496 user_must_be_member
= True
;
500 groupname
= talloc_string_sub(talloc_tos(), groupname
,
501 "%S", lp_servicename(snum
));
502 if (groupname
== NULL
) {
503 DEBUG(1, ("talloc_string_sub failed\n"));
504 result
= NT_STATUS_NO_MEMORY
;
508 if (!lookup_name_smbconf(talloc_tos(), groupname
,
509 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
510 NULL
, NULL
, &group_sid
, &type
)) {
511 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
516 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
517 (type
!= SID_NAME_WKN_GRP
)) {
518 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
519 sid_type_lookup(type
)));
523 if (!sid_to_gid(&group_sid
, &gid
)) {
524 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
525 sid_string_dbg(&group_sid
), groupname
));
530 * If the user has been forced and the forced group starts with a '+',
531 * then we only set the group to be the forced group if the forced
532 * user is a member of that group. Otherwise, the meaning of the '+'
536 if (force_user
&& user_must_be_member
) {
537 if (user_in_group_sid(username
, &group_sid
)) {
538 sid_copy(pgroup_sid
, &group_sid
);
540 DEBUG(3,("Forced group %s for member %s\n",
541 groupname
, username
));
543 DEBUG(0,("find_forced_group: forced user %s is not a member "
544 "of forced group %s. Disallowing access.\n",
545 username
, groupname
));
546 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
550 sid_copy(pgroup_sid
, &group_sid
);
552 DEBUG(3,("Forced group %s\n", groupname
));
555 result
= NT_STATUS_OK
;
561 /****************************************************************************
562 Create an auth_serversupplied_info structure for a connection_struct
563 ****************************************************************************/
565 static NTSTATUS
create_connection_server_info(struct smbd_server_connection
*sconn
,
566 TALLOC_CTX
*mem_ctx
, int snum
,
567 struct auth_serversupplied_info
*vuid_serverinfo
,
569 struct auth_serversupplied_info
**presult
)
571 if (lp_guest_only(snum
)) {
572 return make_server_info_guest(mem_ctx
, presult
);
575 if (vuid_serverinfo
!= NULL
) {
577 struct auth_serversupplied_info
*result
;
580 * This is the normal security != share case where we have a
581 * valid vuid from the session setup. */
583 if (vuid_serverinfo
->guest
) {
584 if (!lp_guest_ok(snum
)) {
585 DEBUG(2, ("guest user (from session setup) "
586 "not permitted to access this share "
587 "(%s)\n", lp_servicename(snum
)));
588 return NT_STATUS_ACCESS_DENIED
;
591 if (!user_ok_token(vuid_serverinfo
->unix_name
,
592 pdb_get_domain(vuid_serverinfo
->sam_account
),
593 vuid_serverinfo
->ptok
, snum
)) {
594 DEBUG(2, ("user '%s' (from session setup) not "
595 "permitted to access this share "
597 vuid_serverinfo
->unix_name
,
598 lp_servicename(snum
)));
599 return NT_STATUS_ACCESS_DENIED
;
603 result
= copy_serverinfo(mem_ctx
, vuid_serverinfo
);
604 if (result
== NULL
) {
605 return NT_STATUS_NO_MEMORY
;
612 if (lp_security() == SEC_SHARE
) {
617 /* add the sharename as a possible user name if we
618 are in share mode security */
620 add_session_user(sconn
, lp_servicename(snum
));
622 /* shall we let them in? */
624 if (!authorise_login(sconn
, snum
,user
,password
,&guest
)) {
625 DEBUG( 2, ( "Invalid username/password for [%s]\n",
626 lp_servicename(snum
)) );
627 return NT_STATUS_WRONG_PASSWORD
;
630 return make_serverinfo_from_username(mem_ctx
, user
, guest
,
634 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
635 return NT_STATUS_ACCESS_DENIED
;
639 /****************************************************************************
640 Make a connection, given the snum to connect to, and the vuser of the
641 connecting user if appropriate.
642 ****************************************************************************/
644 connection_struct
*make_connection_snum(struct smbd_server_connection
*sconn
,
645 int snum
, user_struct
*vuser
,
650 connection_struct
*conn
;
651 struct smb_filename
*smb_fname_cpath
= NULL
;
654 char addr
[INET6_ADDRSTRLEN
];
659 if (NT_STATUS_IS_ERR(*pstatus
= share_sanity_checks(snum
, dev
))) {
663 conn
= conn_new(sconn
);
665 DEBUG(0,("Couldn't find free connection.\n"));
666 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
670 conn
->params
->service
= snum
;
672 status
= create_connection_server_info(sconn
,
673 conn
, snum
, vuser
? vuser
->server_info
: NULL
, password
,
676 if (!NT_STATUS_IS_OK(status
)) {
677 DEBUG(1, ("create_connection_server_info failed: %s\n",
684 if ((lp_guest_only(snum
)) || (lp_security() == SEC_SHARE
)) {
685 conn
->force_user
= true;
688 add_session_user(sconn
, conn
->server_info
->unix_name
);
690 safe_strcpy(conn
->client_address
,
691 client_addr(get_client_fd(),addr
,sizeof(addr
)),
692 sizeof(conn
->client_address
)-1);
693 conn
->num_files_open
= 0;
694 conn
->lastused
= conn
->lastused_count
= time(NULL
);
696 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
697 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
698 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
700 /* Case options for the share. */
701 if (lp_casesensitive(snum
) == Auto
) {
702 /* We will be setting this per packet. Set to be case
703 * insensitive for now. */
704 conn
->case_sensitive
= False
;
706 conn
->case_sensitive
= (bool)lp_casesensitive(snum
);
709 conn
->case_preserve
= lp_preservecase(snum
);
710 conn
->short_case_preserve
= lp_shortpreservecase(snum
);
712 conn
->encrypt_level
= lp_smb_encrypt(snum
);
714 conn
->veto_list
= NULL
;
715 conn
->hide_list
= NULL
;
716 conn
->veto_oplock_list
= NULL
;
717 conn
->aio_write_behind_list
= NULL
;
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
;
852 if ((!conn
->printer
) && (!conn
->ipc
)) {
853 conn
->notify_ctx
= notify_init(conn
, server_id_self(),
854 smbd_messaging_context(),
855 smbd_event_context(),
859 /* ROOT Activities: */
860 /* explicitly check widelinks here so that we can correctly warn
862 widelinks_warning(snum
);
865 * Enforce the max connections parameter.
868 if ((lp_max_connections(snum
) > 0)
869 && (count_current_connections(lp_servicename(SNUM(conn
)), True
) >=
870 lp_max_connections(snum
))) {
872 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
873 lp_max_connections(snum
), lp_servicename(snum
)));
875 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
880 * Get us an entry in the connections db
882 if (!claim_connection(conn
, lp_servicename(snum
), 0)) {
883 DEBUG(1, ("Could not store connections entry\n"));
885 *pstatus
= NT_STATUS_INTERNAL_DB_ERROR
;
889 /* Invoke VFS make connection hook - must be the first
890 VFS operation we do. */
892 if (SMB_VFS_CONNECT(conn
, lp_servicename(snum
),
893 conn
->server_info
->unix_name
) < 0) {
894 DEBUG(0,("make_connection: VFS make connection failed!\n"));
895 yield_connection(conn
, lp_servicename(snum
));
897 *pstatus
= NT_STATUS_UNSUCCESSFUL
;
902 * Fix compatibility issue pointed out by Volker.
903 * We pass the conn->connectpath to the preexec
904 * scripts as a parameter, so attempt to canonicalize
905 * it here before calling the preexec scripts.
906 * We ignore errors here, as it is possible that
907 * the conn->connectpath doesn't exist yet and
908 * the preexec scripts will create them.
911 (void)canonicalize_connect_path(conn
);
913 /* Preexecs are done here as they might make the dir we are to ChDir
915 /* execute any "root preexec = " line */
916 if (*lp_rootpreexec(snum
)) {
917 char *cmd
= talloc_sub_advanced(talloc_tos(),
918 lp_servicename(SNUM(conn
)),
919 conn
->server_info
->unix_name
,
921 conn
->server_info
->utok
.gid
,
922 conn
->server_info
->sanitized_username
,
923 pdb_get_domain(conn
->server_info
->sam_account
),
924 lp_rootpreexec(snum
));
925 DEBUG(5,("cmd=%s\n",cmd
));
926 ret
= smbrun(cmd
,NULL
);
928 if (ret
!= 0 && lp_rootpreexec_close(snum
)) {
929 DEBUG(1,("root preexec gave %d - failing "
930 "connection\n", ret
));
931 SMB_VFS_DISCONNECT(conn
);
932 yield_connection(conn
, lp_servicename(snum
));
934 *pstatus
= NT_STATUS_ACCESS_DENIED
;
939 /* USER Activites: */
940 if (!change_to_user(conn
, conn
->vuid
)) {
941 /* No point continuing if they fail the basic checks */
942 DEBUG(0,("Can't become connected user!\n"));
943 SMB_VFS_DISCONNECT(conn
);
944 yield_connection(conn
, lp_servicename(snum
));
946 *pstatus
= NT_STATUS_LOGON_FAILURE
;
950 /* Remember that a different vuid can connect later without these
953 /* Preexecs are done here as they might make the dir we are to ChDir
956 /* execute any "preexec = " line */
957 if (*lp_preexec(snum
)) {
958 char *cmd
= talloc_sub_advanced(talloc_tos(),
959 lp_servicename(SNUM(conn
)),
960 conn
->server_info
->unix_name
,
962 conn
->server_info
->utok
.gid
,
963 conn
->server_info
->sanitized_username
,
964 pdb_get_domain(conn
->server_info
->sam_account
),
966 ret
= smbrun(cmd
,NULL
);
968 if (ret
!= 0 && lp_preexec_close(snum
)) {
969 DEBUG(1,("preexec gave %d - failing connection\n",
971 *pstatus
= NT_STATUS_ACCESS_DENIED
;
977 * If widelinks are disallowed we need to canonicalise the connect
978 * path here to ensure we don't have any symlinks in the
979 * connectpath. We will be checking all paths on this connection are
980 * below this directory. We must do this after the VFS init as we
981 * depend on the realpath() pointer in the vfs table. JRA.
983 if (!lp_widelinks(snum
)) {
984 if (!canonicalize_connect_path(conn
)) {
985 DEBUG(0, ("canonicalize_connect_path failed "
986 "for service %s, path %s\n",
987 lp_servicename(snum
),
989 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
994 #ifdef WITH_FAKE_KASERVER
995 if (lp_afs_share(snum
)) {
1000 /* Add veto/hide lists */
1001 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
1002 set_namearray( &conn
->veto_list
, lp_veto_files(snum
));
1003 set_namearray( &conn
->hide_list
, lp_hide_files(snum
));
1004 set_namearray( &conn
->veto_oplock_list
, lp_veto_oplocks(snum
));
1005 set_namearray( &conn
->aio_write_behind_list
,
1006 lp_aio_write_behind(snum
));
1009 status
= create_synthetic_smb_fname(talloc_tos(), conn
->connectpath
,
1010 NULL
, NULL
, &smb_fname_cpath
);
1011 if (!NT_STATUS_IS_OK(status
)) {
1016 /* win2000 does not check the permissions on the directory
1017 during the tree connect, instead relying on permission
1018 check during individual operations. To match this behaviour
1019 I have disabled this chdir check (tridge) */
1020 /* the alternative is just to check the directory exists */
1021 if ((ret
= SMB_VFS_STAT(conn
, smb_fname_cpath
)) != 0 ||
1022 !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
1023 if (ret
== 0 && !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
1024 DEBUG(0,("'%s' is not a directory, when connecting to "
1025 "[%s]\n", conn
->connectpath
,
1026 lp_servicename(snum
)));
1028 DEBUG(0,("'%s' does not exist or permission denied "
1029 "when connecting to [%s] Error was %s\n",
1030 conn
->connectpath
, lp_servicename(snum
),
1033 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
1036 conn
->base_share_dev
= smb_fname_cpath
->st
.st_ex_dev
;
1038 string_set(&conn
->origpath
,conn
->connectpath
);
1040 #if SOFTLINK_OPTIMISATION
1041 /* resolve any soft links early if possible */
1042 if (vfs_ChDir(conn
,conn
->connectpath
) == 0) {
1043 TALLOC_CTX
*ctx
= talloc_tos();
1044 char *s
= vfs_GetWd(ctx
,s
);
1046 *status
= map_nt_error_from_unix(errno
);
1049 if (!set_conn_connectpath(conn
,s
)) {
1050 *status
= NT_STATUS_NO_MEMORY
;
1053 vfs_ChDir(conn
,conn
->connectpath
);
1057 /* Figure out the characteristics of the underlying filesystem. This
1058 * assumes that all the filesystem mounted withing a share path have
1059 * the same characteristics, which is likely but not guaranteed.
1062 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
, &conn
->ts_res
);
1065 * Print out the 'connected as' stuff here as we need
1066 * to know the effective uid and gid we will be using
1067 * (at least initially).
1070 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
1071 dbgtext( "%s (%s) ", get_remote_machine_name(),
1072 conn
->client_address
);
1073 dbgtext( "%s", srv_is_signing_active(smbd_server_conn
) ? "signed " : "");
1074 dbgtext( "connect to service %s ", lp_servicename(snum
) );
1075 dbgtext( "initially as user %s ",
1076 conn
->server_info
->unix_name
);
1077 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1078 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1081 /* we've finished with the user stuff - go back to root */
1082 change_to_root_user();
1086 TALLOC_FREE(smb_fname_cpath
);
1087 change_to_root_user();
1088 /* Call VFS disconnect hook */
1089 SMB_VFS_DISCONNECT(conn
);
1090 yield_connection(conn
, lp_servicename(snum
));
1095 /****************************************************************************
1096 Make a connection to a service.
1099 ****************************************************************************/
1101 connection_struct
*make_connection(struct smbd_server_connection
*sconn
,
1102 const char *service_in
, DATA_BLOB password
,
1103 const char *pdev
, uint16 vuid
,
1107 user_struct
*vuser
= NULL
;
1111 char addr
[INET6_ADDRSTRLEN
];
1115 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1117 if (!non_root_mode() && (euid
= geteuid()) != 0) {
1118 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1119 "(%u)\n", (unsigned int)euid
));
1120 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1123 if (conn_num_open(sconn
) > 2047) {
1124 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1128 if(lp_security() != SEC_SHARE
) {
1129 vuser
= get_valid_user_struct(sconn
, vuid
);
1131 DEBUG(1,("make_connection: refusing to connect with "
1132 "no session setup\n"));
1133 *status
= NT_STATUS_ACCESS_DENIED
;
1138 /* Logic to try and connect to the correct [homes] share, preferably
1139 without too many getpwnam() lookups. This is particulary nasty for
1140 winbind usernames, where the share name isn't the same as unix
1143 The snum of the homes share is stored on the vuser at session setup
1147 if (strequal(service_in
,HOMES_NAME
)) {
1148 if(lp_security() != SEC_SHARE
) {
1149 DATA_BLOB no_pw
= data_blob_null
;
1150 if (vuser
->homes_snum
== -1) {
1151 DEBUG(2, ("[homes] share not available for "
1152 "this user because it was not found "
1153 "or created at session setup "
1155 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1158 DEBUG(5, ("making a connection to [homes] service "
1159 "created at session setup time\n"));
1160 return make_connection_snum(sconn
,
1165 /* Security = share. Try with
1166 * current_user_info.smb_name as the username. */
1167 if (*current_user_info
.smb_name
) {
1168 fstring unix_username
;
1169 fstrcpy(unix_username
,
1170 current_user_info
.smb_name
);
1171 map_username(sconn
, unix_username
);
1172 snum
= find_service(unix_username
);
1175 DEBUG(5, ("making a connection to 'homes' "
1176 "service %s based on "
1177 "security=share\n", service_in
));
1178 return make_connection_snum(sconn
,
1184 } else if ((lp_security() != SEC_SHARE
) && (vuser
->homes_snum
!= -1)
1185 && strequal(service_in
,
1186 lp_servicename(vuser
->homes_snum
))) {
1187 DATA_BLOB no_pw
= data_blob_null
;
1188 DEBUG(5, ("making a connection to 'homes' service [%s] "
1189 "created at session setup time\n", service_in
));
1190 return make_connection_snum(sconn
,
1196 fstrcpy(service
, service_in
);
1198 strlower_m(service
);
1200 snum
= find_service(service
);
1203 if (strequal(service
,"IPC$") ||
1204 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1205 DEBUG(3,("refusing IPC connection to %s\n", service
));
1206 *status
= NT_STATUS_ACCESS_DENIED
;
1210 DEBUG(3,("%s (%s) couldn't find service %s\n",
1211 get_remote_machine_name(),
1212 client_addr(get_client_fd(),addr
,sizeof(addr
)),
1214 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1218 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1219 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum
) != '\0')) {
1220 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1221 "(pointing to %s)\n",
1222 service
, lp_msdfs_proxy(snum
)));
1223 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1227 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1229 return make_connection_snum(sconn
, snum
, vuser
,
1234 /****************************************************************************
1236 ****************************************************************************/
1238 void close_cnum(connection_struct
*conn
, uint16 vuid
)
1240 file_close_conn(conn
);
1242 if (!IS_IPC(conn
)) {
1243 dptr_closecnum(conn
);
1246 change_to_root_user();
1248 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1249 get_remote_machine_name(),
1250 conn
->client_address
,
1251 lp_servicename(SNUM(conn
))));
1253 /* Call VFS disconnect hook */
1254 SMB_VFS_DISCONNECT(conn
);
1256 yield_connection(conn
, lp_servicename(SNUM(conn
)));
1258 /* make sure we leave the directory available for unmount */
1259 vfs_ChDir(conn
, "/");
1261 /* execute any "postexec = " line */
1262 if (*lp_postexec(SNUM(conn
)) &&
1263 change_to_user(conn
, vuid
)) {
1264 char *cmd
= talloc_sub_advanced(talloc_tos(),
1265 lp_servicename(SNUM(conn
)),
1266 conn
->server_info
->unix_name
,
1268 conn
->server_info
->utok
.gid
,
1269 conn
->server_info
->sanitized_username
,
1270 pdb_get_domain(conn
->server_info
->sam_account
),
1271 lp_postexec(SNUM(conn
)));
1274 change_to_root_user();
1277 change_to_root_user();
1278 /* execute any "root postexec = " line */
1279 if (*lp_rootpostexec(SNUM(conn
))) {
1280 char *cmd
= talloc_sub_advanced(talloc_tos(),
1281 lp_servicename(SNUM(conn
)),
1282 conn
->server_info
->unix_name
,
1284 conn
->server_info
->utok
.gid
,
1285 conn
->server_info
->sanitized_username
,
1286 pdb_get_domain(conn
->server_info
->sam_account
),
1287 lp_rootpostexec(SNUM(conn
)));