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(0,("chdir (%s) failed\n",
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
)
310 all_string_sub(service
,"\\","/",0);
312 iService
= lp_servicenumber(service
);
314 /* now handle the special case of a home directory */
316 char *phome_dir
= get_user_home_dir(talloc_tos(), service
);
320 * Try mapping the servicename, it may
321 * be a Windows to unix mapped user name.
323 if(map_username(service
))
324 phome_dir
= get_user_home_dir(
325 talloc_tos(), service
);
328 DEBUG(3,("checking for home directory %s gave %s\n",service
,
329 phome_dir
?phome_dir
:"(NULL)"));
331 iService
= add_home_service(service
,service
/* 'username' */, phome_dir
);
334 /* If we still don't have a service, attempt to add it as a printer. */
338 if ((iPrinterService
= lp_servicenumber(PRINTERS_NAME
)) < 0) {
339 iPrinterService
= load_registry_service(PRINTERS_NAME
);
341 if (iPrinterService
) {
342 DEBUG(3,("checking whether %s is a valid printer name...\n", service
));
343 if (pcap_printername_ok(service
)) {
344 DEBUG(3,("%s is a valid printer name\n", service
));
345 DEBUG(3,("adding %s as a printer service\n", service
));
346 lp_add_printer(service
, iPrinterService
);
347 iService
= lp_servicenumber(service
);
349 DEBUG(0,("failed to add %s as a printer service!\n", service
));
352 DEBUG(3,("%s is not a valid printer name\n", service
));
357 /* Check for default vfs service? Unsure whether to implement this */
362 iService
= load_registry_service(service
);
365 /* Is it a usershare service ? */
366 if (iService
< 0 && *lp_usershare_path()) {
367 /* Ensure the name is canonicalized. */
369 iService
= load_usershare_service(service
);
372 /* just possibly it's a default service? */
374 char *pdefservice
= lp_defaultservice();
375 if (pdefservice
&& *pdefservice
&& !strequal(pdefservice
,service
) && !strstr_m(service
,"..")) {
377 * We need to do a local copy here as lp_defaultservice()
378 * returns one of the rotating lp_string buffers that
379 * could get overwritten by the recursive find_service() call
380 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
382 char *defservice
= SMB_STRDUP(pdefservice
);
388 /* Disallow anything except explicit share names. */
389 if (strequal(defservice
,HOMES_NAME
) ||
390 strequal(defservice
, PRINTERS_NAME
) ||
391 strequal(defservice
, "IPC$")) {
392 SAFE_FREE(defservice
);
396 iService
= find_service(defservice
);
398 all_string_sub(service
, "_","/",0);
399 iService
= lp_add_service(service
, iService
);
401 SAFE_FREE(defservice
);
406 if (!VALID_SNUM(iService
)) {
407 DEBUG(0,("Invalid snum %d for %s\n",iService
, service
));
415 DEBUG(3,("find_service() failed to find service %s\n", service
));
421 /****************************************************************************
422 do some basic sainity checks on the share.
423 This function modifies dev, ecode.
424 ****************************************************************************/
426 static NTSTATUS
share_sanity_checks(int snum
, fstring dev
)
429 if (!lp_snum_ok(snum
) ||
430 !check_access(smbd_server_fd(),
431 lp_hostsallow(snum
), lp_hostsdeny(snum
))) {
432 return NT_STATUS_ACCESS_DENIED
;
435 if (dev
[0] == '?' || !dev
[0]) {
436 if (lp_print_ok(snum
)) {
437 fstrcpy(dev
,"LPT1:");
438 } else if (strequal(lp_fstype(snum
), "IPC")) {
447 if (lp_print_ok(snum
)) {
448 if (!strequal(dev
, "LPT1:")) {
449 return NT_STATUS_BAD_DEVICE_TYPE
;
451 } else if (strequal(lp_fstype(snum
), "IPC")) {
452 if (!strequal(dev
, "IPC")) {
453 return NT_STATUS_BAD_DEVICE_TYPE
;
455 } else if (!strequal(dev
, "A:")) {
456 return NT_STATUS_BAD_DEVICE_TYPE
;
459 /* Behave as a printer if we are supposed to */
460 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
461 fstrcpy(dev
, "LPT1:");
468 * Go through lookup_name etc to find the force'd group.
470 * Create a new token from src_token, replacing the primary group sid with the
474 static NTSTATUS
find_forced_group(bool force_user
,
475 int snum
, const char *username
,
479 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
480 TALLOC_CTX
*frame
= talloc_stackframe();
482 enum lsa_SidType type
;
484 bool user_must_be_member
= False
;
487 groupname
= talloc_strdup(talloc_tos(), lp_force_group(snum
));
488 if (groupname
== NULL
) {
489 DEBUG(1, ("talloc_strdup failed\n"));
490 result
= NT_STATUS_NO_MEMORY
;
494 if (groupname
[0] == '+') {
495 user_must_be_member
= True
;
499 groupname
= talloc_string_sub(talloc_tos(), groupname
,
500 "%S", lp_servicename(snum
));
501 if (groupname
== NULL
) {
502 DEBUG(1, ("talloc_string_sub failed\n"));
503 result
= NT_STATUS_NO_MEMORY
;
507 if (!lookup_name_smbconf(talloc_tos(), groupname
,
508 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
509 NULL
, NULL
, &group_sid
, &type
)) {
510 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
515 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
516 (type
!= SID_NAME_WKN_GRP
)) {
517 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
518 sid_type_lookup(type
)));
522 if (!sid_to_gid(&group_sid
, &gid
)) {
523 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
524 sid_string_dbg(&group_sid
), groupname
));
529 * If the user has been forced and the forced group starts with a '+',
530 * then we only set the group to be the forced group if the forced
531 * user is a member of that group. Otherwise, the meaning of the '+'
535 if (force_user
&& user_must_be_member
) {
536 if (user_in_group_sid(username
, &group_sid
)) {
537 sid_copy(pgroup_sid
, &group_sid
);
539 DEBUG(3,("Forced group %s for member %s\n",
540 groupname
, username
));
542 DEBUG(0,("find_forced_group: forced user %s is not a member "
543 "of forced group %s. Disallowing access.\n",
544 username
, groupname
));
545 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
549 sid_copy(pgroup_sid
, &group_sid
);
551 DEBUG(3,("Forced group %s\n", groupname
));
554 result
= NT_STATUS_OK
;
560 /****************************************************************************
561 Create an auth_serversupplied_info structure for a connection_struct
562 ****************************************************************************/
564 static NTSTATUS
create_connection_server_info(TALLOC_CTX
*mem_ctx
, int snum
,
565 struct auth_serversupplied_info
*vuid_serverinfo
,
567 struct auth_serversupplied_info
**presult
)
569 if (lp_guest_only(snum
)) {
570 return make_server_info_guest(mem_ctx
, presult
);
573 if (vuid_serverinfo
!= NULL
) {
575 struct auth_serversupplied_info
*result
;
578 * This is the normal security != share case where we have a
579 * valid vuid from the session setup. */
581 if (vuid_serverinfo
->guest
) {
582 if (!lp_guest_ok(snum
)) {
583 DEBUG(2, ("guest user (from session setup) "
584 "not permitted to access this share "
585 "(%s)\n", lp_servicename(snum
)));
586 return NT_STATUS_ACCESS_DENIED
;
589 if (!user_ok_token(vuid_serverinfo
->unix_name
,
590 pdb_get_domain(vuid_serverinfo
->sam_account
),
591 vuid_serverinfo
->ptok
, snum
)) {
592 DEBUG(2, ("user '%s' (from session setup) not "
593 "permitted to access this share "
595 vuid_serverinfo
->unix_name
,
596 lp_servicename(snum
)));
597 return NT_STATUS_ACCESS_DENIED
;
601 result
= copy_serverinfo(mem_ctx
, vuid_serverinfo
);
602 if (result
== NULL
) {
603 return NT_STATUS_NO_MEMORY
;
610 if (lp_security() == SEC_SHARE
) {
615 /* add the sharename as a possible user name if we
616 are in share mode security */
618 add_session_user(lp_servicename(snum
));
620 /* shall we let them in? */
622 if (!authorise_login(snum
,user
,password
,&guest
)) {
623 DEBUG( 2, ( "Invalid username/password for [%s]\n",
624 lp_servicename(snum
)) );
625 return NT_STATUS_WRONG_PASSWORD
;
628 return make_serverinfo_from_username(mem_ctx
, user
, guest
,
632 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
633 return NT_STATUS_ACCESS_DENIED
;
637 /****************************************************************************
638 Make a connection, given the snum to connect to, and the vuser of the
639 connecting user if appropriate.
640 ****************************************************************************/
642 static connection_struct
*make_connection_snum(int snum
, user_struct
*vuser
,
647 connection_struct
*conn
;
651 char addr
[INET6_ADDRSTRLEN
];
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
;
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
));
1010 /* win2000 does not check the permissions on the directory
1011 during the tree connect, instead relying on permission
1012 check during individual operations. To match this behaviour
1013 I have disabled this chdir check (tridge) */
1014 /* the alternative is just to check the directory exists */
1015 if ((ret
= SMB_VFS_STAT(conn
, conn
->connectpath
, &st
)) != 0 ||
1016 !S_ISDIR(st
.st_mode
)) {
1017 if (ret
== 0 && !S_ISDIR(st
.st_mode
)) {
1018 DEBUG(0,("'%s' is not a directory, when connecting to "
1019 "[%s]\n", conn
->connectpath
,
1020 lp_servicename(snum
)));
1022 DEBUG(0,("'%s' does not exist or permission denied "
1023 "when connecting to [%s] Error was %s\n",
1024 conn
->connectpath
, lp_servicename(snum
),
1027 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
1031 string_set(&conn
->origpath
,conn
->connectpath
);
1033 #if SOFTLINK_OPTIMISATION
1034 /* resolve any soft links early if possible */
1035 if (vfs_ChDir(conn
,conn
->connectpath
) == 0) {
1036 TALLOC_CTX
*ctx
= talloc_tos();
1037 char *s
= vfs_GetWd(ctx
,s
);
1039 *status
= map_nt_error_from_unix(errno
);
1042 if (!set_conn_connectpath(conn
,s
)) {
1043 *status
= NT_STATUS_NO_MEMORY
;
1046 vfs_ChDir(conn
,conn
->connectpath
);
1050 /* Figure out the characteristics of the underlying filesystem. This
1051 * assumes that all the filesystem mounted withing a share path have
1052 * the same characteristics, which is likely but not guaranteed.
1055 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
);
1058 * Print out the 'connected as' stuff here as we need
1059 * to know the effective uid and gid we will be using
1060 * (at least initially).
1063 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
1064 dbgtext( "%s (%s) ", get_remote_machine_name(),
1065 conn
->client_address
);
1066 dbgtext( "%s", srv_is_signing_active() ? "signed " : "");
1067 dbgtext( "connect to service %s ", lp_servicename(snum
) );
1068 dbgtext( "initially as user %s ",
1069 conn
->server_info
->unix_name
);
1070 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1071 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1074 /* we've finished with the user stuff - go back to root */
1075 change_to_root_user();
1080 change_to_root_user();
1081 /* Call VFS disconnect hook */
1082 SMB_VFS_DISCONNECT(conn
);
1083 yield_connection(conn
, lp_servicename(snum
));
1088 /****************************************************************************
1089 Make a connection to a service.
1092 ****************************************************************************/
1094 connection_struct
*make_connection(const char *service_in
, DATA_BLOB password
,
1095 const char *pdev
, uint16 vuid
,
1099 user_struct
*vuser
= NULL
;
1103 char addr
[INET6_ADDRSTRLEN
];
1107 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1109 if (!non_root_mode() && (euid
= geteuid()) != 0) {
1110 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1111 "(%u)\n", (unsigned int)euid
));
1112 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1115 if (conn_num_open() > 2047) {
1116 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1120 if(lp_security() != SEC_SHARE
) {
1121 vuser
= get_valid_user_struct(vuid
);
1123 DEBUG(1,("make_connection: refusing to connect with "
1124 "no session setup\n"));
1125 *status
= NT_STATUS_ACCESS_DENIED
;
1130 /* Logic to try and connect to the correct [homes] share, preferably
1131 without too many getpwnam() lookups. This is particulary nasty for
1132 winbind usernames, where the share name isn't the same as unix
1135 The snum of the homes share is stored on the vuser at session setup
1139 if (strequal(service_in
,HOMES_NAME
)) {
1140 if(lp_security() != SEC_SHARE
) {
1141 DATA_BLOB no_pw
= data_blob_null
;
1142 if (vuser
->homes_snum
== -1) {
1143 DEBUG(2, ("[homes] share not available for "
1144 "this user because it was not found "
1145 "or created at session setup "
1147 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1150 DEBUG(5, ("making a connection to [homes] service "
1151 "created at session setup time\n"));
1152 return make_connection_snum(vuser
->homes_snum
,
1156 /* Security = share. Try with
1157 * current_user_info.smb_name as the username. */
1158 if (*current_user_info
.smb_name
) {
1159 fstring unix_username
;
1160 fstrcpy(unix_username
,
1161 current_user_info
.smb_name
);
1162 map_username(unix_username
);
1163 snum
= find_service(unix_username
);
1166 DEBUG(5, ("making a connection to 'homes' "
1167 "service %s based on "
1168 "security=share\n", service_in
));
1169 return make_connection_snum(snum
, NULL
,
1174 } else if ((lp_security() != SEC_SHARE
) && (vuser
->homes_snum
!= -1)
1175 && strequal(service_in
,
1176 lp_servicename(vuser
->homes_snum
))) {
1177 DATA_BLOB no_pw
= data_blob_null
;
1178 DEBUG(5, ("making a connection to 'homes' service [%s] "
1179 "created at session setup time\n", service_in
));
1180 return make_connection_snum(vuser
->homes_snum
,
1185 fstrcpy(service
, service_in
);
1187 strlower_m(service
);
1189 snum
= find_service(service
);
1192 if (strequal(service
,"IPC$") ||
1193 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1194 DEBUG(3,("refusing IPC connection to %s\n", service
));
1195 *status
= NT_STATUS_ACCESS_DENIED
;
1199 DEBUG(0,("%s (%s) couldn't find service %s\n",
1200 get_remote_machine_name(),
1201 client_addr(get_client_fd(),addr
,sizeof(addr
)),
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(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
->client_address
,
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 pdb_get_domain(conn
->server_info
->sam_account
),
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 pdb_get_domain(conn
->server_info
->sam_account
),
1276 lp_rootpostexec(SNUM(conn
)));