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_in is modified (to canonical form??)
304 * and returned in return parameter service.
307 int find_service(const char *service_in
, fstring service
)
310 struct smbd_server_connection
*sconn
= smbd_server_conn
;
316 fstrcpy(service
, service_in
);
317 all_string_sub(service
,"\\","/",0);
319 iService
= lp_servicenumber(service
);
321 /* now handle the special case of a home directory */
323 char *phome_dir
= get_user_home_dir(talloc_tos(), service
);
327 * Try mapping the servicename, it may
328 * be a Windows to unix mapped user name.
330 if(map_username(sconn
, service
))
331 phome_dir
= get_user_home_dir(
332 talloc_tos(), service
);
335 DEBUG(3,("checking for home directory %s gave %s\n",service
,
336 phome_dir
?phome_dir
:"(NULL)"));
338 iService
= add_home_service(service
,service
/* 'username' */, phome_dir
);
341 /* If we still don't have a service, attempt to add it as a printer. */
345 if ((iPrinterService
= lp_servicenumber(PRINTERS_NAME
)) < 0) {
346 iPrinterService
= load_registry_service(PRINTERS_NAME
);
348 if (iPrinterService
>= 0) {
349 DEBUG(3,("checking whether %s is a valid printer name...\n", service
));
350 if (pcap_printername_ok(service
)) {
351 DEBUG(3,("%s is a valid printer name\n", service
));
352 DEBUG(3,("adding %s as a printer service\n", service
));
353 lp_add_printer(service
, iPrinterService
);
354 iService
= lp_servicenumber(service
);
356 DEBUG(0,("failed to add %s as a printer service!\n", service
));
359 DEBUG(3,("%s is not a valid printer name\n", service
));
364 /* Check for default vfs service? Unsure whether to implement this */
369 iService
= load_registry_service(service
);
372 /* Is it a usershare service ? */
373 if (iService
< 0 && *lp_usershare_path()) {
374 /* Ensure the name is canonicalized. */
376 iService
= load_usershare_service(service
);
379 /* just possibly it's a default service? */
381 char *pdefservice
= lp_defaultservice();
382 if (pdefservice
&& *pdefservice
&& !strequal(pdefservice
,service
) && !strstr_m(service
,"..")) {
384 * We need to do a local copy here as lp_defaultservice()
385 * returns one of the rotating lp_string buffers that
386 * could get overwritten by the recursive find_service() call
387 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
389 char *defservice
= SMB_STRDUP(pdefservice
);
395 /* Disallow anything except explicit share names. */
396 if (strequal(defservice
,HOMES_NAME
) ||
397 strequal(defservice
, PRINTERS_NAME
) ||
398 strequal(defservice
, "IPC$")) {
399 SAFE_FREE(defservice
);
403 iService
= find_service(defservice
, service
);
405 all_string_sub(service
, "_","/",0);
406 iService
= lp_add_service(service
, iService
);
408 SAFE_FREE(defservice
);
413 if (!VALID_SNUM(iService
)) {
414 DEBUG(0,("Invalid snum %d for %s\n",iService
, service
));
422 DEBUG(3,("find_service() failed to find service %s\n", service
));
428 /****************************************************************************
429 do some basic sainity checks on the share.
430 This function modifies dev, ecode.
431 ****************************************************************************/
433 static NTSTATUS
share_sanity_checks(int snum
, fstring dev
)
436 if (!lp_snum_ok(snum
) ||
437 !check_access(smbd_server_fd(),
438 lp_hostsallow(snum
), lp_hostsdeny(snum
))) {
439 return NT_STATUS_ACCESS_DENIED
;
442 if (dev
[0] == '?' || !dev
[0]) {
443 if (lp_print_ok(snum
)) {
444 fstrcpy(dev
,"LPT1:");
445 } else if (strequal(lp_fstype(snum
), "IPC")) {
454 if (lp_print_ok(snum
)) {
455 if (!strequal(dev
, "LPT1:")) {
456 return NT_STATUS_BAD_DEVICE_TYPE
;
458 } else if (strequal(lp_fstype(snum
), "IPC")) {
459 if (!strequal(dev
, "IPC")) {
460 return NT_STATUS_BAD_DEVICE_TYPE
;
462 } else if (!strequal(dev
, "A:")) {
463 return NT_STATUS_BAD_DEVICE_TYPE
;
466 /* Behave as a printer if we are supposed to */
467 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
468 fstrcpy(dev
, "LPT1:");
475 * Go through lookup_name etc to find the force'd group.
477 * Create a new token from src_token, replacing the primary group sid with the
481 static NTSTATUS
find_forced_group(bool force_user
,
482 int snum
, const char *username
,
486 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
487 TALLOC_CTX
*frame
= talloc_stackframe();
489 enum lsa_SidType type
;
491 bool user_must_be_member
= False
;
494 groupname
= talloc_strdup(talloc_tos(), lp_force_group(snum
));
495 if (groupname
== NULL
) {
496 DEBUG(1, ("talloc_strdup failed\n"));
497 result
= NT_STATUS_NO_MEMORY
;
501 if (groupname
[0] == '+') {
502 user_must_be_member
= True
;
506 groupname
= talloc_string_sub(talloc_tos(), groupname
,
507 "%S", lp_servicename(snum
));
508 if (groupname
== NULL
) {
509 DEBUG(1, ("talloc_string_sub failed\n"));
510 result
= NT_STATUS_NO_MEMORY
;
514 if (!lookup_name_smbconf(talloc_tos(), groupname
,
515 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
516 NULL
, NULL
, &group_sid
, &type
)) {
517 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
522 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
523 (type
!= SID_NAME_WKN_GRP
)) {
524 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
525 sid_type_lookup(type
)));
529 if (!sid_to_gid(&group_sid
, &gid
)) {
530 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
531 sid_string_dbg(&group_sid
), groupname
));
536 * If the user has been forced and the forced group starts with a '+',
537 * then we only set the group to be the forced group if the forced
538 * user is a member of that group. Otherwise, the meaning of the '+'
542 if (force_user
&& user_must_be_member
) {
543 if (user_in_group_sid(username
, &group_sid
)) {
544 sid_copy(pgroup_sid
, &group_sid
);
546 DEBUG(3,("Forced group %s for member %s\n",
547 groupname
, username
));
549 DEBUG(0,("find_forced_group: forced user %s is not a member "
550 "of forced group %s. Disallowing access.\n",
551 username
, groupname
));
552 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
556 sid_copy(pgroup_sid
, &group_sid
);
558 DEBUG(3,("Forced group %s\n", groupname
));
561 result
= NT_STATUS_OK
;
567 /****************************************************************************
568 Create an auth_serversupplied_info structure for a connection_struct
569 ****************************************************************************/
571 static NTSTATUS
create_connection_server_info(struct smbd_server_connection
*sconn
,
572 TALLOC_CTX
*mem_ctx
, int snum
,
573 struct auth_serversupplied_info
*vuid_serverinfo
,
575 struct auth_serversupplied_info
**presult
)
577 if (lp_guest_only(snum
)) {
578 return make_server_info_guest(mem_ctx
, presult
);
581 if (vuid_serverinfo
!= NULL
) {
583 struct auth_serversupplied_info
*result
;
586 * This is the normal security != share case where we have a
587 * valid vuid from the session setup. */
589 if (vuid_serverinfo
->guest
) {
590 if (!lp_guest_ok(snum
)) {
591 DEBUG(2, ("guest user (from session setup) "
592 "not permitted to access this share "
593 "(%s)\n", lp_servicename(snum
)));
594 return NT_STATUS_ACCESS_DENIED
;
597 if (!user_ok_token(vuid_serverinfo
->unix_name
,
598 pdb_get_domain(vuid_serverinfo
->sam_account
),
599 vuid_serverinfo
->ptok
, snum
)) {
600 DEBUG(2, ("user '%s' (from session setup) not "
601 "permitted to access this share "
603 vuid_serverinfo
->unix_name
,
604 lp_servicename(snum
)));
605 return NT_STATUS_ACCESS_DENIED
;
609 result
= copy_serverinfo(mem_ctx
, vuid_serverinfo
);
610 if (result
== NULL
) {
611 return NT_STATUS_NO_MEMORY
;
618 if (lp_security() == SEC_SHARE
) {
623 /* add the sharename as a possible user name if we
624 are in share mode security */
626 add_session_user(sconn
, lp_servicename(snum
));
628 /* shall we let them in? */
630 if (!authorise_login(sconn
, snum
,user
,password
,&guest
)) {
631 DEBUG( 2, ( "Invalid username/password for [%s]\n",
632 lp_servicename(snum
)) );
633 return NT_STATUS_WRONG_PASSWORD
;
636 return make_serverinfo_from_username(mem_ctx
, user
, guest
,
640 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
641 return NT_STATUS_ACCESS_DENIED
;
645 /****************************************************************************
646 Make a connection, given the snum to connect to, and the vuser of the
647 connecting user if appropriate.
648 ****************************************************************************/
650 connection_struct
*make_connection_snum(struct smbd_server_connection
*sconn
,
651 int snum
, user_struct
*vuser
,
656 connection_struct
*conn
;
657 struct smb_filename
*smb_fname_cpath
= NULL
;
660 char addr
[INET6_ADDRSTRLEN
];
665 if (NT_STATUS_IS_ERR(*pstatus
= share_sanity_checks(snum
, dev
))) {
669 conn
= conn_new(sconn
);
671 DEBUG(0,("Couldn't find free connection.\n"));
672 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
676 conn
->params
->service
= snum
;
678 status
= create_connection_server_info(sconn
,
679 conn
, snum
, vuser
? vuser
->server_info
: NULL
, password
,
682 if (!NT_STATUS_IS_OK(status
)) {
683 DEBUG(1, ("create_connection_server_info failed: %s\n",
690 if ((lp_guest_only(snum
)) || (lp_security() == SEC_SHARE
)) {
691 conn
->force_user
= true;
694 add_session_user(sconn
, conn
->server_info
->unix_name
);
696 safe_strcpy(conn
->client_address
,
697 client_addr(get_client_fd(),addr
,sizeof(addr
)),
698 sizeof(conn
->client_address
)-1);
699 conn
->num_files_open
= 0;
700 conn
->lastused
= conn
->lastused_count
= time(NULL
);
702 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
703 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
704 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
706 /* Case options for the share. */
707 if (lp_casesensitive(snum
) == Auto
) {
708 /* We will be setting this per packet. Set to be case
709 * insensitive for now. */
710 conn
->case_sensitive
= False
;
712 conn
->case_sensitive
= (bool)lp_casesensitive(snum
);
715 conn
->case_preserve
= lp_preservecase(snum
);
716 conn
->short_case_preserve
= lp_shortpreservecase(snum
);
718 conn
->encrypt_level
= lp_smb_encrypt(snum
);
720 conn
->veto_list
= NULL
;
721 conn
->hide_list
= NULL
;
722 conn
->veto_oplock_list
= NULL
;
723 conn
->aio_write_behind_list
= NULL
;
725 conn
->read_only
= lp_readonly(SNUM(conn
));
726 conn
->admin_user
= False
;
728 if (*lp_force_user(snum
)) {
731 * Replace conn->server_info with a completely faked up one
732 * from the username we are forced into :-)
736 struct auth_serversupplied_info
*forced_serverinfo
;
738 fuser
= talloc_string_sub(conn
, lp_force_user(snum
), "%S",
739 lp_servicename(snum
));
742 *pstatus
= NT_STATUS_NO_MEMORY
;
746 status
= make_serverinfo_from_username(
747 conn
, fuser
, conn
->server_info
->guest
,
749 if (!NT_STATUS_IS_OK(status
)) {
755 /* We don't want to replace the original sanitized_username
756 as it is the original user given in the connect attempt.
757 This is used in '%U' substitutions. */
758 TALLOC_FREE(forced_serverinfo
->sanitized_username
);
759 forced_serverinfo
->sanitized_username
=
760 talloc_move(forced_serverinfo
,
761 &conn
->server_info
->sanitized_username
);
763 TALLOC_FREE(conn
->server_info
);
764 conn
->server_info
= forced_serverinfo
;
766 conn
->force_user
= True
;
767 DEBUG(3,("Forced user %s\n", fuser
));
771 * If force group is true, then override
772 * any groupid stored for the connecting user.
775 if (*lp_force_group(snum
)) {
777 status
= find_forced_group(
778 conn
->force_user
, snum
, conn
->server_info
->unix_name
,
779 &conn
->server_info
->ptok
->user_sids
[1],
780 &conn
->server_info
->utok
.gid
);
782 if (!NT_STATUS_IS_OK(status
)) {
789 * We need to cache this gid, to use within
790 * change_to_user() separately from the conn->server_info
791 * struct. We only use conn->server_info directly if
792 * "force_user" was set.
794 conn
->force_group_gid
= conn
->server_info
->utok
.gid
;
797 conn
->vuid
= (vuser
!= NULL
) ? vuser
->vuid
: UID_FIELD_INVALID
;
800 char *s
= talloc_sub_advanced(talloc_tos(),
801 lp_servicename(SNUM(conn
)),
802 conn
->server_info
->unix_name
,
804 conn
->server_info
->utok
.gid
,
805 conn
->server_info
->sanitized_username
,
806 pdb_get_domain(conn
->server_info
->sam_account
),
810 *pstatus
= NT_STATUS_NO_MEMORY
;
814 if (!set_conn_connectpath(conn
,s
)) {
817 *pstatus
= NT_STATUS_NO_MEMORY
;
820 DEBUG(3,("Connect path is '%s' for service [%s]\n",s
,
821 lp_servicename(snum
)));
826 * New code to check if there's a share security descripter
827 * added from NT server manager. This is done after the
828 * smb.conf checks are done as we need a uid and token. JRA.
833 bool can_write
= False
;
835 can_write
= share_access_check(conn
->server_info
->ptok
,
836 lp_servicename(snum
),
840 if (!share_access_check(conn
->server_info
->ptok
,
841 lp_servicename(snum
),
843 /* No access, read or write. */
844 DEBUG(0,("make_connection: connection to %s "
845 "denied due to security "
847 lp_servicename(snum
)));
849 *pstatus
= NT_STATUS_ACCESS_DENIED
;
852 conn
->read_only
= True
;
856 /* Initialise VFS function pointers */
858 if (!smbd_vfs_init(conn
)) {
859 DEBUG(0, ("vfs_init failed for service %s\n",
860 lp_servicename(snum
)));
862 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
866 if ((!conn
->printer
) && (!conn
->ipc
)) {
867 conn
->notify_ctx
= notify_init(conn
, server_id_self(),
868 smbd_messaging_context(),
869 smbd_event_context(),
873 /* ROOT Activities: */
874 /* explicitly check widelinks here so that we can correctly warn
876 widelinks_warning(snum
);
879 * Enforce the max connections parameter.
882 if ((lp_max_connections(snum
) > 0)
883 && (count_current_connections(lp_servicename(SNUM(conn
)), True
) >=
884 lp_max_connections(snum
))) {
886 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
887 lp_max_connections(snum
), lp_servicename(snum
)));
889 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
894 * Get us an entry in the connections db
896 if (!claim_connection(conn
, lp_servicename(snum
), 0)) {
897 DEBUG(1, ("Could not store connections entry\n"));
899 *pstatus
= NT_STATUS_INTERNAL_DB_ERROR
;
903 /* Invoke VFS make connection hook - must be the first
904 VFS operation we do. */
906 if (SMB_VFS_CONNECT(conn
, lp_servicename(snum
),
907 conn
->server_info
->unix_name
) < 0) {
908 DEBUG(0,("make_connection: VFS make connection failed!\n"));
909 yield_connection(conn
, lp_servicename(snum
));
911 *pstatus
= NT_STATUS_UNSUCCESSFUL
;
916 * Fix compatibility issue pointed out by Volker.
917 * We pass the conn->connectpath to the preexec
918 * scripts as a parameter, so attempt to canonicalize
919 * it here before calling the preexec scripts.
920 * We ignore errors here, as it is possible that
921 * the conn->connectpath doesn't exist yet and
922 * the preexec scripts will create them.
925 (void)canonicalize_connect_path(conn
);
927 /* Preexecs are done here as they might make the dir we are to ChDir
929 /* execute any "root preexec = " line */
930 if (*lp_rootpreexec(snum
)) {
931 char *cmd
= talloc_sub_advanced(talloc_tos(),
932 lp_servicename(SNUM(conn
)),
933 conn
->server_info
->unix_name
,
935 conn
->server_info
->utok
.gid
,
936 conn
->server_info
->sanitized_username
,
937 pdb_get_domain(conn
->server_info
->sam_account
),
938 lp_rootpreexec(snum
));
939 DEBUG(5,("cmd=%s\n",cmd
));
940 ret
= smbrun(cmd
,NULL
);
942 if (ret
!= 0 && lp_rootpreexec_close(snum
)) {
943 DEBUG(1,("root preexec gave %d - failing "
944 "connection\n", ret
));
945 SMB_VFS_DISCONNECT(conn
);
946 yield_connection(conn
, lp_servicename(snum
));
948 *pstatus
= NT_STATUS_ACCESS_DENIED
;
953 /* USER Activites: */
954 if (!change_to_user(conn
, conn
->vuid
)) {
955 /* No point continuing if they fail the basic checks */
956 DEBUG(0,("Can't become connected user!\n"));
957 SMB_VFS_DISCONNECT(conn
);
958 yield_connection(conn
, lp_servicename(snum
));
960 *pstatus
= NT_STATUS_LOGON_FAILURE
;
964 /* Remember that a different vuid can connect later without these
967 /* Preexecs are done here as they might make the dir we are to ChDir
970 /* execute any "preexec = " line */
971 if (*lp_preexec(snum
)) {
972 char *cmd
= talloc_sub_advanced(talloc_tos(),
973 lp_servicename(SNUM(conn
)),
974 conn
->server_info
->unix_name
,
976 conn
->server_info
->utok
.gid
,
977 conn
->server_info
->sanitized_username
,
978 pdb_get_domain(conn
->server_info
->sam_account
),
980 ret
= smbrun(cmd
,NULL
);
982 if (ret
!= 0 && lp_preexec_close(snum
)) {
983 DEBUG(1,("preexec gave %d - failing connection\n",
985 *pstatus
= NT_STATUS_ACCESS_DENIED
;
991 * If widelinks are disallowed we need to canonicalise the connect
992 * path here to ensure we don't have any symlinks in the
993 * connectpath. We will be checking all paths on this connection are
994 * below this directory. We must do this after the VFS init as we
995 * depend on the realpath() pointer in the vfs table. JRA.
997 if (!lp_widelinks(snum
)) {
998 if (!canonicalize_connect_path(conn
)) {
999 DEBUG(0, ("canonicalize_connect_path failed "
1000 "for service %s, path %s\n",
1001 lp_servicename(snum
),
1002 conn
->connectpath
));
1003 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
1008 #ifdef WITH_FAKE_KASERVER
1009 if (lp_afs_share(snum
)) {
1014 /* Add veto/hide lists */
1015 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
1016 set_namearray( &conn
->veto_list
, lp_veto_files(snum
));
1017 set_namearray( &conn
->hide_list
, lp_hide_files(snum
));
1018 set_namearray( &conn
->veto_oplock_list
, lp_veto_oplocks(snum
));
1019 set_namearray( &conn
->aio_write_behind_list
,
1020 lp_aio_write_behind(snum
));
1023 status
= create_synthetic_smb_fname(talloc_tos(), conn
->connectpath
,
1024 NULL
, NULL
, &smb_fname_cpath
);
1025 if (!NT_STATUS_IS_OK(status
)) {
1030 /* win2000 does not check the permissions on the directory
1031 during the tree connect, instead relying on permission
1032 check during individual operations. To match this behaviour
1033 I have disabled this chdir check (tridge) */
1034 /* the alternative is just to check the directory exists */
1035 if ((ret
= SMB_VFS_STAT(conn
, smb_fname_cpath
)) != 0 ||
1036 !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
1037 if (ret
== 0 && !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
1038 DEBUG(0,("'%s' is not a directory, when connecting to "
1039 "[%s]\n", conn
->connectpath
,
1040 lp_servicename(snum
)));
1042 DEBUG(0,("'%s' does not exist or permission denied "
1043 "when connecting to [%s] Error was %s\n",
1044 conn
->connectpath
, lp_servicename(snum
),
1047 *pstatus
= NT_STATUS_BAD_NETWORK_NAME
;
1050 conn
->base_share_dev
= smb_fname_cpath
->st
.st_ex_dev
;
1052 string_set(&conn
->origpath
,conn
->connectpath
);
1054 #if SOFTLINK_OPTIMISATION
1055 /* resolve any soft links early if possible */
1056 if (vfs_ChDir(conn
,conn
->connectpath
) == 0) {
1057 TALLOC_CTX
*ctx
= talloc_tos();
1058 char *s
= vfs_GetWd(ctx
,s
);
1060 *status
= map_nt_error_from_unix(errno
);
1063 if (!set_conn_connectpath(conn
,s
)) {
1064 *status
= NT_STATUS_NO_MEMORY
;
1067 vfs_ChDir(conn
,conn
->connectpath
);
1071 /* Figure out the characteristics of the underlying filesystem. This
1072 * assumes that all the filesystem mounted withing a share path have
1073 * the same characteristics, which is likely but not guaranteed.
1076 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
, &conn
->ts_res
);
1079 * Print out the 'connected as' stuff here as we need
1080 * to know the effective uid and gid we will be using
1081 * (at least initially).
1084 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
1085 dbgtext( "%s (%s) ", get_remote_machine_name(),
1086 conn
->client_address
);
1087 dbgtext( "%s", srv_is_signing_active(smbd_server_conn
) ? "signed " : "");
1088 dbgtext( "connect to service %s ", lp_servicename(snum
) );
1089 dbgtext( "initially as user %s ",
1090 conn
->server_info
->unix_name
);
1091 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1092 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1095 /* we've finished with the user stuff - go back to root */
1096 change_to_root_user();
1100 TALLOC_FREE(smb_fname_cpath
);
1101 change_to_root_user();
1102 /* Call VFS disconnect hook */
1103 SMB_VFS_DISCONNECT(conn
);
1104 yield_connection(conn
, lp_servicename(snum
));
1109 /****************************************************************************
1110 Make a connection to a service.
1113 ****************************************************************************/
1115 connection_struct
*make_connection(struct smbd_server_connection
*sconn
,
1116 const char *service_in
, DATA_BLOB password
,
1117 const char *pdev
, uint16 vuid
,
1121 user_struct
*vuser
= NULL
;
1125 char addr
[INET6_ADDRSTRLEN
];
1129 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1131 if (!non_root_mode() && (euid
= geteuid()) != 0) {
1132 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1133 "(%u)\n", (unsigned int)euid
));
1134 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1137 if (conn_num_open(sconn
) > 2047) {
1138 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1142 if(lp_security() != SEC_SHARE
) {
1143 vuser
= get_valid_user_struct(sconn
, vuid
);
1145 DEBUG(1,("make_connection: refusing to connect with "
1146 "no session setup\n"));
1147 *status
= NT_STATUS_ACCESS_DENIED
;
1152 /* Logic to try and connect to the correct [homes] share, preferably
1153 without too many getpwnam() lookups. This is particulary nasty for
1154 winbind usernames, where the share name isn't the same as unix
1157 The snum of the homes share is stored on the vuser at session setup
1161 if (strequal(service_in
,HOMES_NAME
)) {
1162 if(lp_security() != SEC_SHARE
) {
1163 DATA_BLOB no_pw
= data_blob_null
;
1164 if (vuser
->homes_snum
== -1) {
1165 DEBUG(2, ("[homes] share not available for "
1166 "this user because it was not found "
1167 "or created at session setup "
1169 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1172 DEBUG(5, ("making a connection to [homes] service "
1173 "created at session setup time\n"));
1174 return make_connection_snum(sconn
,
1179 /* Security = share. Try with
1180 * current_user_info.smb_name as the username. */
1181 if (*current_user_info
.smb_name
) {
1182 fstring unix_username
;
1183 fstrcpy(unix_username
,
1184 current_user_info
.smb_name
);
1185 map_username(sconn
, unix_username
);
1186 snum
= find_service(unix_username
, unix_username
);
1189 DEBUG(5, ("making a connection to 'homes' "
1190 "service %s based on "
1191 "security=share\n", service_in
));
1192 return make_connection_snum(sconn
,
1198 } else if ((lp_security() != SEC_SHARE
) && (vuser
->homes_snum
!= -1)
1199 && strequal(service_in
,
1200 lp_servicename(vuser
->homes_snum
))) {
1201 DATA_BLOB no_pw
= data_blob_null
;
1202 DEBUG(5, ("making a connection to 'homes' service [%s] "
1203 "created at session setup time\n", service_in
));
1204 return make_connection_snum(sconn
,
1210 fstrcpy(service
, service_in
);
1212 strlower_m(service
);
1214 snum
= find_service(service
, service
);
1217 if (strequal(service
,"IPC$") ||
1218 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1219 DEBUG(3,("refusing IPC connection to %s\n", service
));
1220 *status
= NT_STATUS_ACCESS_DENIED
;
1224 DEBUG(3,("%s (%s) couldn't find service %s\n",
1225 get_remote_machine_name(),
1226 client_addr(get_client_fd(),addr
,sizeof(addr
)),
1228 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1232 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1233 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum
) != '\0')) {
1234 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1235 "(pointing to %s)\n",
1236 service
, lp_msdfs_proxy(snum
)));
1237 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1241 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1243 return make_connection_snum(sconn
, snum
, vuser
,
1248 /****************************************************************************
1250 ****************************************************************************/
1252 void close_cnum(connection_struct
*conn
, uint16 vuid
)
1254 file_close_conn(conn
);
1256 if (!IS_IPC(conn
)) {
1257 dptr_closecnum(conn
);
1260 change_to_root_user();
1262 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1263 get_remote_machine_name(),
1264 conn
->client_address
,
1265 lp_servicename(SNUM(conn
))));
1267 /* Call VFS disconnect hook */
1268 SMB_VFS_DISCONNECT(conn
);
1270 yield_connection(conn
, lp_servicename(SNUM(conn
)));
1272 /* make sure we leave the directory available for unmount */
1273 vfs_ChDir(conn
, "/");
1275 /* execute any "postexec = " line */
1276 if (*lp_postexec(SNUM(conn
)) &&
1277 change_to_user(conn
, vuid
)) {
1278 char *cmd
= talloc_sub_advanced(talloc_tos(),
1279 lp_servicename(SNUM(conn
)),
1280 conn
->server_info
->unix_name
,
1282 conn
->server_info
->utok
.gid
,
1283 conn
->server_info
->sanitized_username
,
1284 pdb_get_domain(conn
->server_info
->sam_account
),
1285 lp_postexec(SNUM(conn
)));
1288 change_to_root_user();
1291 change_to_root_user();
1292 /* execute any "root postexec = " line */
1293 if (*lp_rootpostexec(SNUM(conn
))) {
1294 char *cmd
= talloc_sub_advanced(talloc_tos(),
1295 lp_servicename(SNUM(conn
)),
1296 conn
->server_info
->unix_name
,
1298 conn
->server_info
->utok
.gid
,
1299 conn
->server_info
->sanitized_username
,
1300 pdb_get_domain(conn
->server_info
->sam_account
),
1301 lp_rootpostexec(SNUM(conn
)));