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/>.
22 extern userdom_struct current_user_info
;
24 static bool canonicalize_connect_path(connection_struct
*conn
)
26 #ifdef REALPATH_TAKES_NULL
28 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
,NULL
);
32 ret
= set_conn_connectpath(conn
,resolved_name
);
33 SAFE_FREE(resolved_name
);
36 char resolved_name_buf
[PATH_MAX
+1];
37 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
,resolved_name_buf
);
41 return set_conn_connectpath(conn
,resolved_name
);
42 #endif /* REALPATH_TAKES_NULL */
45 /****************************************************************************
46 Ensure when setting connectpath it is a canonicalized (no ./ // or ../)
47 absolute path stating in / and not ending in /.
48 Observent people will notice a similarity between this and check_path_syntax :-).
49 ****************************************************************************/
51 bool set_conn_connectpath(connection_struct
*conn
, const char *connectpath
)
55 const char *s
= connectpath
;
56 bool start_of_name_component
= true;
58 destname
= SMB_STRDUP(connectpath
);
64 *d
++ = '/'; /* Always start with root. */
68 /* Eat multiple '/' */
72 if ((d
> destname
+ 1) && (*s
!= '\0')) {
75 start_of_name_component
= True
;
79 if (start_of_name_component
) {
80 if ((s
[0] == '.') && (s
[1] == '.') && (s
[2] == '/' || s
[2] == '\0')) {
81 /* Uh oh - "/../" or "/..\0" ! */
83 /* Go past the ../ or .. */
87 s
+= 2; /* Go past the .. */
90 /* If we just added a '/' - delete it */
91 if ((d
> destname
) && (*(d
-1) == '/')) {
96 /* Are we at the start ? Can't go back further if so. */
98 *d
++ = '/'; /* Can't delete root */
101 /* Go back one level... */
102 /* Decrement d first as d points to the *next* char to write into. */
103 for (d
--; d
> destname
; d
--) {
108 /* We're still at the start of a name component, just the previous one. */
110 } else if ((s
[0] == '.') && ((s
[1] == '\0') || s
[1] == '/')) {
111 /* Component of pathname can't be "." only - skip the '.' . */
125 /* Get the size of the next MB character. */
126 next_codepoint(s
,&siz
);
147 start_of_name_component
= false;
151 /* And must not end in '/' */
152 if (d
> destname
+ 1 && (*(d
-1) == '/')) {
156 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
157 lp_servicename(SNUM(conn
)), destname
));
159 string_set(&conn
->connectpath
, destname
);
164 /****************************************************************************
165 Load parameters specific to a connection/service.
166 ****************************************************************************/
168 bool set_current_service(connection_struct
*conn
, uint16 flags
, bool do_chdir
)
170 static connection_struct
*last_conn
;
171 static uint16 last_flags
;
179 conn
->lastused_count
++;
184 vfs_ChDir(conn
,conn
->connectpath
) != 0 &&
185 vfs_ChDir(conn
,conn
->origpath
) != 0) {
186 DEBUG(0,("chdir (%s) failed\n",
191 if ((conn
== last_conn
) && (last_flags
== flags
)) {
198 /* Obey the client case sensitivity requests - only for clients that support it. */
199 switch (lp_casesensitive(snum
)) {
202 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
203 enum remote_arch_types ra_type
= get_remote_arch();
204 if ((ra_type
!= RA_SAMBA
) && (ra_type
!= RA_CIFSFS
)) {
205 /* Client can't support per-packet case sensitive pathnames. */
206 conn
->case_sensitive
= False
;
208 conn
->case_sensitive
= !(flags
& FLAG_CASELESS_PATHNAMES
);
213 conn
->case_sensitive
= True
;
216 conn
->case_sensitive
= False
;
222 static int load_registry_service(const char *servicename
)
224 struct registry_key
*key
;
230 struct registry_value
*value
;
234 if (!lp_registry_shares()) {
238 if (strequal(servicename
, GLOBAL_NAME
)) {
242 if (asprintf(&path
, "%s\\%s", KEY_SMBCONF
, servicename
) == -1) {
246 err
= reg_open_path(NULL
, path
, REG_KEY_READ
, get_root_nt_token(),
250 if (!W_ERROR_IS_OK(err
)) {
254 res
= lp_add_service(servicename
, -1);
260 W_ERROR_IS_OK(reg_enumvalue(key
, key
, i
, &value_name
, &value
));
262 switch (value
->type
) {
265 if (asprintf(&tmp
, "%d", value
->v
.dword
) == -1) {
268 lp_do_parameter(res
, value_name
, tmp
);
273 lp_do_parameter(res
, value_name
, value
->v
.sz
.str
);
277 /* Ignore all the rest */
281 TALLOC_FREE(value_name
);
291 void load_registry_shares(void)
293 struct registry_key
*key
;
298 DEBUG(8, ("load_registry_shares()\n"));
299 if (!lp_registry_shares()) {
303 err
= reg_open_path(NULL
, KEY_SMBCONF
, REG_KEY_READ
,
304 get_root_nt_token(), &key
);
305 if (!(W_ERROR_IS_OK(err
))) {
309 for (i
=0; W_ERROR_IS_OK(reg_enumkey(key
, key
, i
, &name
, NULL
)); i
++) {
310 load_registry_service(name
);
318 /****************************************************************************
319 Add a home service. Returns the new service number or -1 if fail.
320 ****************************************************************************/
322 int add_home_service(const char *service
, const char *username
, const char *homedir
)
326 if (!service
|| !homedir
)
329 if ((iHomeService
= lp_servicenumber(HOMES_NAME
)) < 0) {
330 if ((iHomeService
= load_registry_service(HOMES_NAME
)) < 0) {
336 * If this is a winbindd provided username, remove
337 * the domain component before adding the service.
338 * Log a warning if the "path=" parameter does not
339 * include any macros.
343 const char *p
= strchr(service
,*lp_winbind_separator());
345 /* We only want the 'user' part of the string */
351 if (!lp_add_home(service
, iHomeService
, username
, homedir
)) {
355 return lp_servicenumber(service
);
360 * Find a service entry.
362 * @param service is modified (to canonical form??)
365 int find_service(fstring service
)
369 all_string_sub(service
,"\\","/",0);
371 iService
= lp_servicenumber(service
);
373 /* now handle the special case of a home directory */
375 char *phome_dir
= get_user_home_dir(talloc_tos(), service
);
379 * Try mapping the servicename, it may
380 * be a Windows to unix mapped user name.
382 if(map_username(service
))
383 phome_dir
= get_user_home_dir(
384 talloc_tos(), service
);
387 DEBUG(3,("checking for home directory %s gave %s\n",service
,
388 phome_dir
?phome_dir
:"(NULL)"));
390 iService
= add_home_service(service
,service
/* 'username' */, phome_dir
);
393 /* If we still don't have a service, attempt to add it as a printer. */
397 if ((iPrinterService
= lp_servicenumber(PRINTERS_NAME
)) < 0) {
398 iPrinterService
= load_registry_service(PRINTERS_NAME
);
400 if (iPrinterService
) {
401 DEBUG(3,("checking whether %s is a valid printer name...\n", service
));
402 if (pcap_printername_ok(service
)) {
403 DEBUG(3,("%s is a valid printer name\n", service
));
404 DEBUG(3,("adding %s as a printer service\n", service
));
405 lp_add_printer(service
, iPrinterService
);
406 iService
= lp_servicenumber(service
);
408 DEBUG(0,("failed to add %s as a printer service!\n", service
));
411 DEBUG(3,("%s is not a valid printer name\n", service
));
416 /* Check for default vfs service? Unsure whether to implement this */
421 iService
= load_registry_service(service
);
424 /* Is it a usershare service ? */
425 if (iService
< 0 && *lp_usershare_path()) {
426 /* Ensure the name is canonicalized. */
428 iService
= load_usershare_service(service
);
431 /* just possibly it's a default service? */
433 char *pdefservice
= lp_defaultservice();
434 if (pdefservice
&& *pdefservice
&& !strequal(pdefservice
,service
) && !strstr_m(service
,"..")) {
436 * We need to do a local copy here as lp_defaultservice()
437 * returns one of the rotating lp_string buffers that
438 * could get overwritten by the recursive find_service() call
439 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
441 char *defservice
= SMB_STRDUP(pdefservice
);
447 /* Disallow anything except explicit share names. */
448 if (strequal(defservice
,HOMES_NAME
) ||
449 strequal(defservice
, PRINTERS_NAME
) ||
450 strequal(defservice
, "IPC$")) {
451 SAFE_FREE(defservice
);
455 iService
= find_service(defservice
);
457 all_string_sub(service
, "_","/",0);
458 iService
= lp_add_service(service
, iService
);
460 SAFE_FREE(defservice
);
465 if (!VALID_SNUM(iService
)) {
466 DEBUG(0,("Invalid snum %d for %s\n",iService
, service
));
474 DEBUG(3,("find_service() failed to find service %s\n", service
));
480 /****************************************************************************
481 do some basic sainity checks on the share.
482 This function modifies dev, ecode.
483 ****************************************************************************/
485 static NTSTATUS
share_sanity_checks(int snum
, fstring dev
)
488 if (!lp_snum_ok(snum
) ||
489 !check_access(smbd_server_fd(),
490 lp_hostsallow(snum
), lp_hostsdeny(snum
))) {
491 return NT_STATUS_ACCESS_DENIED
;
494 if (dev
[0] == '?' || !dev
[0]) {
495 if (lp_print_ok(snum
)) {
496 fstrcpy(dev
,"LPT1:");
497 } else if (strequal(lp_fstype(snum
), "IPC")) {
506 if (lp_print_ok(snum
)) {
507 if (!strequal(dev
, "LPT1:")) {
508 return NT_STATUS_BAD_DEVICE_TYPE
;
510 } else if (strequal(lp_fstype(snum
), "IPC")) {
511 if (!strequal(dev
, "IPC")) {
512 return NT_STATUS_BAD_DEVICE_TYPE
;
514 } else if (!strequal(dev
, "A:")) {
515 return NT_STATUS_BAD_DEVICE_TYPE
;
518 /* Behave as a printer if we are supposed to */
519 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
520 fstrcpy(dev
, "LPT1:");
526 static NTSTATUS
find_forced_user(connection_struct
*conn
, bool vuser_is_guest
, fstring username
)
528 int snum
= conn
->params
->service
;
529 char *fuser
, *found_username
;
532 if (!(fuser
= talloc_string_sub(conn
->mem_ctx
, lp_force_user(snum
), "%S",
533 lp_servicename(snum
)))) {
534 return NT_STATUS_NO_MEMORY
;
537 result
= create_token_from_username(conn
->mem_ctx
, fuser
, vuser_is_guest
,
538 &conn
->uid
, &conn
->gid
, &found_username
,
539 &conn
->nt_user_token
);
540 if (!NT_STATUS_IS_OK(result
)) {
544 fstrcpy(username
, found_username
);
547 TALLOC_FREE(found_username
);
552 * Go through lookup_name etc to find the force'd group.
554 * Create a new token from src_token, replacing the primary group sid with the
558 static NTSTATUS
find_forced_group(bool force_user
,
559 int snum
, const char *username
,
563 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
566 enum lsa_SidType type
;
568 bool user_must_be_member
= False
;
571 ZERO_STRUCTP(pgroup_sid
);
574 mem_ctx
= talloc_new(NULL
);
575 if (mem_ctx
== NULL
) {
576 DEBUG(0, ("talloc_new failed\n"));
577 return NT_STATUS_NO_MEMORY
;
580 groupname
= talloc_strdup(mem_ctx
, lp_force_group(snum
));
581 if (groupname
== NULL
) {
582 DEBUG(1, ("talloc_strdup failed\n"));
583 result
= NT_STATUS_NO_MEMORY
;
587 if (groupname
[0] == '+') {
588 user_must_be_member
= True
;
592 groupname
= talloc_string_sub(mem_ctx
, groupname
,
593 "%S", lp_servicename(snum
));
595 if (!lookup_name_smbconf(mem_ctx
, groupname
,
596 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
597 NULL
, NULL
, &group_sid
, &type
)) {
598 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
603 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
604 (type
!= SID_NAME_WKN_GRP
)) {
605 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
606 sid_type_lookup(type
)));
610 if (!sid_to_gid(&group_sid
, &gid
)) {
611 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
612 sid_string_dbg(&group_sid
), groupname
));
617 * If the user has been forced and the forced group starts with a '+',
618 * then we only set the group to be the forced group if the forced
619 * user is a member of that group. Otherwise, the meaning of the '+'
623 if (force_user
&& user_must_be_member
) {
624 if (user_in_group_sid(username
, &group_sid
)) {
625 sid_copy(pgroup_sid
, &group_sid
);
627 DEBUG(3,("Forced group %s for member %s\n",
628 groupname
, username
));
630 DEBUG(0,("find_forced_group: forced user %s is not a member "
631 "of forced group %s. Disallowing access.\n",
632 username
, groupname
));
633 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
637 sid_copy(pgroup_sid
, &group_sid
);
639 DEBUG(3,("Forced group %s\n", groupname
));
642 result
= NT_STATUS_OK
;
644 TALLOC_FREE(mem_ctx
);
648 /****************************************************************************
649 Make a connection, given the snum to connect to, and the vuser of the
650 connecting user if appropriate.
651 ****************************************************************************/
653 static connection_struct
*make_connection_snum(int snum
, user_struct
*vuser
,
658 struct passwd
*pass
= NULL
;
660 connection_struct
*conn
;
665 char addr
[INET6_ADDRSTRLEN
];
666 bool on_err_call_dis_hook
= false;
670 SET_STAT_INVALID(st
);
672 if (NT_STATUS_IS_ERR(*status
= share_sanity_checks(snum
, dev
))) {
678 DEBUG(0,("Couldn't find free connection.\n"));
679 *status
= NT_STATUS_INSUFFICIENT_RESOURCES
;
683 conn
->params
->service
= snum
;
684 conn
->nt_user_token
= NULL
;
686 if (lp_guest_only(snum
)) {
687 const char *guestname
= lp_guestaccount();
689 char *found_username
= NULL
;
692 pass
= getpwnam_alloc(NULL
, guestname
);
694 DEBUG(0,("make_connection_snum: Invalid guest "
695 "account %s??\n",guestname
));
697 *status
= NT_STATUS_NO_SUCH_USER
;
700 status2
= create_token_from_username(conn
->mem_ctx
, pass
->pw_name
, True
,
701 &conn
->uid
, &conn
->gid
,
703 &conn
->nt_user_token
);
704 if (!NT_STATUS_IS_OK(status2
)) {
710 fstrcpy(user
, found_username
);
711 string_set(&conn
->user
,user
);
712 conn
->force_user
= True
;
713 TALLOC_FREE(found_username
);
715 DEBUG(3,("Guest only user %s\n",user
));
718 if (!lp_guest_ok(snum
)) {
719 DEBUG(2, ("guest user (from session setup) "
720 "not permitted to access this share "
721 "(%s)\n", lp_servicename(snum
)));
723 *status
= NT_STATUS_ACCESS_DENIED
;
727 if (!user_ok_token(vuser
->user
.unix_name
,
728 vuser
->nt_user_token
, snum
)) {
729 DEBUG(2, ("user '%s' (from session setup) not "
730 "permitted to access this share "
731 "(%s)\n", vuser
->user
.unix_name
,
732 lp_servicename(snum
)));
734 *status
= NT_STATUS_ACCESS_DENIED
;
738 conn
->vuid
= vuser
->vuid
;
739 conn
->uid
= vuser
->uid
;
740 conn
->gid
= vuser
->gid
;
741 string_set(&conn
->user
,vuser
->user
.unix_name
);
742 fstrcpy(user
,vuser
->user
.unix_name
);
743 guest
= vuser
->guest
;
744 } else if (lp_security() == SEC_SHARE
) {
746 char *found_username
= NULL
;
748 /* add it as a possible user name if we
749 are in share mode security */
750 add_session_user(lp_servicename(snum
));
751 /* shall we let them in? */
752 if (!authorise_login(snum
,user
,password
,&guest
)) {
753 DEBUG( 2, ( "Invalid username/password for [%s]\n",
754 lp_servicename(snum
)) );
756 *status
= NT_STATUS_WRONG_PASSWORD
;
759 pass
= Get_Pwnam_alloc(talloc_tos(), user
);
760 status2
= create_token_from_username(conn
->mem_ctx
, pass
->pw_name
, True
,
761 &conn
->uid
, &conn
->gid
,
763 &conn
->nt_user_token
);
765 if (!NT_STATUS_IS_OK(status2
)) {
770 fstrcpy(user
, found_username
);
771 string_set(&conn
->user
,user
);
772 TALLOC_FREE(found_username
);
773 conn
->force_user
= True
;
775 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
777 *status
= NT_STATUS_ACCESS_DENIED
;
781 add_session_user(user
);
783 safe_strcpy(conn
->client_address
,
784 client_addr(get_client_fd(),addr
,sizeof(addr
)),
785 sizeof(conn
->client_address
)-1);
786 conn
->num_files_open
= 0;
787 conn
->lastused
= conn
->lastused_count
= time(NULL
);
789 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
790 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
791 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
794 /* Case options for the share. */
795 if (lp_casesensitive(snum
) == Auto
) {
796 /* We will be setting this per packet. Set to be case
797 * insensitive for now. */
798 conn
->case_sensitive
= False
;
800 conn
->case_sensitive
= (bool)lp_casesensitive(snum
);
803 conn
->case_preserve
= lp_preservecase(snum
);
804 conn
->short_case_preserve
= lp_shortpreservecase(snum
);
806 conn
->encrypt_level
= lp_smb_encrypt(snum
);
808 conn
->veto_list
= NULL
;
809 conn
->hide_list
= NULL
;
810 conn
->veto_oplock_list
= NULL
;
811 conn
->aio_write_behind_list
= NULL
;
812 string_set(&conn
->dirpath
,"");
813 string_set(&conn
->user
,user
);
815 conn
->read_only
= lp_readonly(SNUM(conn
));
816 conn
->admin_user
= False
;
819 * If force user is true, then store the given userid and the gid of
820 * the user we're forcing.
821 * For auxiliary groups see below.
824 if (*lp_force_user(snum
)) {
827 status2
= find_forced_user(conn
,
828 (vuser
!= NULL
) && vuser
->guest
,
830 if (!NT_STATUS_IS_OK(status2
)) {
835 string_set(&conn
->user
,user
);
836 conn
->force_user
= True
;
837 DEBUG(3,("Forced user %s\n",user
));
841 * If force group is true, then override
842 * any groupid stored for the connecting user.
845 if (*lp_force_group(snum
)) {
849 status2
= find_forced_group(conn
->force_user
,
851 &group_sid
, &conn
->gid
);
852 if (!NT_STATUS_IS_OK(status2
)) {
858 if ((conn
->nt_user_token
== NULL
) && (vuser
!= NULL
)) {
860 /* Not force user and not security=share, but force
861 * group. vuser has a token to copy */
863 conn
->nt_user_token
= dup_nt_token(
864 NULL
, vuser
->nt_user_token
);
865 if (conn
->nt_user_token
== NULL
) {
866 DEBUG(0, ("dup_nt_token failed\n"));
868 *status
= NT_STATUS_NO_MEMORY
;
873 /* If conn->nt_user_token is still NULL, we have
874 * security=share. This means ignore the SID, as we had no
875 * vuser to copy from */
877 if (conn
->nt_user_token
!= NULL
) {
878 /* Overwrite the primary group sid */
879 sid_copy(&conn
->nt_user_token
->user_sids
[1],
883 conn
->force_group
= True
;
886 if (conn
->nt_user_token
!= NULL
) {
889 /* We have a share-specific token from force [user|group].
890 * This means we have to create the list of unix groups from
891 * the list of sids. */
896 for (i
=0; i
<conn
->nt_user_token
->num_sids
; i
++) {
898 DOM_SID
*sid
= &conn
->nt_user_token
->user_sids
[i
];
900 if (!sid_to_gid(sid
, &gid
)) {
901 DEBUG(10, ("Could not convert SID %s to gid, "
903 sid_string_dbg(sid
)));
906 if (!add_gid_to_array_unique(conn
->mem_ctx
, gid
, &conn
->groups
,
908 DEBUG(0, ("add_gid_to_array_unique failed\n"));
910 *status
= NT_STATUS_NO_MEMORY
;
917 char *s
= talloc_sub_advanced(talloc_tos(),
918 lp_servicename(SNUM(conn
)), conn
->user
,
919 conn
->connectpath
, conn
->gid
,
920 get_current_username(),
921 current_user_info
.domain
,
925 *status
= NT_STATUS_NO_MEMORY
;
929 if (!set_conn_connectpath(conn
,s
)) {
932 *status
= NT_STATUS_NO_MEMORY
;
935 DEBUG(3,("Connect path is '%s' for service [%s]\n",s
,
936 lp_servicename(snum
)));
941 * New code to check if there's a share security descripter
942 * added from NT server manager. This is done after the
943 * smb.conf checks are done as we need a uid and token. JRA.
948 bool can_write
= False
;
949 NT_USER_TOKEN
*token
= conn
->nt_user_token
?
950 conn
->nt_user_token
:
951 (vuser
? vuser
->nt_user_token
: NULL
);
954 * I don't believe this can happen. But the
955 * logic above is convoluted enough to confuse
956 * automated checkers, so be sure. JRA.
960 DEBUG(0,("make_connection: connection to %s "
961 "denied due to missing "
963 lp_servicename(snum
)));
965 *status
= NT_STATUS_ACCESS_DENIED
;
969 can_write
= share_access_check(token
,
970 lp_servicename(snum
),
974 if (!share_access_check(token
,
975 lp_servicename(snum
),
977 /* No access, read or write. */
978 DEBUG(0,("make_connection: connection to %s "
979 "denied due to security "
981 lp_servicename(snum
)));
983 *status
= NT_STATUS_ACCESS_DENIED
;
986 conn
->read_only
= True
;
990 /* Initialise VFS function pointers */
992 if (!smbd_vfs_init(conn
)) {
993 DEBUG(0, ("vfs_init failed for service %s\n",
994 lp_servicename(snum
)));
996 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1001 * If widelinks are disallowed we need to canonicalise the connect
1002 * path here to ensure we don't have any symlinks in the
1003 * connectpath. We will be checking all paths on this connection are
1004 * below this directory. We must do this after the VFS init as we
1005 * depend on the realpath() pointer in the vfs table. JRA.
1007 if (!lp_widelinks(snum
)) {
1008 if (!canonicalize_connect_path(conn
)) {
1009 DEBUG(0, ("canonicalize_connect_path failed "
1010 "for service %s, path %s\n",
1011 lp_servicename(snum
),
1012 conn
->connectpath
));
1014 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1019 if ((!conn
->printer
) && (!conn
->ipc
)) {
1020 conn
->notify_ctx
= notify_init(conn
->mem_ctx
, server_id_self(),
1021 smbd_messaging_context(),
1022 smbd_event_context(),
1026 /* ROOT Activities: */
1028 * Enforce the max connections parameter.
1031 if ((lp_max_connections(snum
) > 0)
1032 && (count_current_connections(lp_servicename(SNUM(conn
)), True
) >=
1033 lp_max_connections(snum
))) {
1035 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
1036 lp_max_connections(snum
), lp_servicename(snum
)));
1038 *status
= NT_STATUS_INSUFFICIENT_RESOURCES
;
1043 * Get us an entry in the connections db
1045 if (!claim_connection(conn
, lp_servicename(snum
), 0)) {
1046 DEBUG(1, ("Could not store connections entry\n"));
1048 *status
= NT_STATUS_INTERNAL_DB_ERROR
;
1052 /* Preexecs are done here as they might make the dir we are to ChDir
1054 /* execute any "root preexec = " line */
1055 if (*lp_rootpreexec(snum
)) {
1056 char *cmd
= talloc_sub_advanced(talloc_tos(),
1057 lp_servicename(SNUM(conn
)), conn
->user
,
1058 conn
->connectpath
, conn
->gid
,
1059 get_current_username(),
1060 current_user_info
.domain
,
1061 lp_rootpreexec(snum
));
1062 DEBUG(5,("cmd=%s\n",cmd
));
1063 ret
= smbrun(cmd
,NULL
);
1065 if (ret
!= 0 && lp_rootpreexec_close(snum
)) {
1066 DEBUG(1,("root preexec gave %d - failing "
1067 "connection\n", ret
));
1068 yield_connection(conn
, lp_servicename(snum
));
1070 *status
= NT_STATUS_ACCESS_DENIED
;
1075 /* USER Activites: */
1076 if (!change_to_user(conn
, conn
->vuid
)) {
1077 /* No point continuing if they fail the basic checks */
1078 DEBUG(0,("Can't become connected user!\n"));
1079 yield_connection(conn
, lp_servicename(snum
));
1081 *status
= NT_STATUS_LOGON_FAILURE
;
1085 /* Remember that a different vuid can connect later without these
1088 /* Preexecs are done here as they might make the dir we are to ChDir
1091 /* execute any "preexec = " line */
1092 if (*lp_preexec(snum
)) {
1093 char *cmd
= talloc_sub_advanced(talloc_tos(),
1094 lp_servicename(SNUM(conn
)), conn
->user
,
1095 conn
->connectpath
, conn
->gid
,
1096 get_current_username(),
1097 current_user_info
.domain
,
1099 ret
= smbrun(cmd
,NULL
);
1101 if (ret
!= 0 && lp_preexec_close(snum
)) {
1102 DEBUG(1,("preexec gave %d - failing connection\n",
1104 *status
= NT_STATUS_ACCESS_DENIED
;
1109 #ifdef WITH_FAKE_KASERVER
1110 if (lp_afs_share(snum
)) {
1115 /* Add veto/hide lists */
1116 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
1117 set_namearray( &conn
->veto_list
, lp_veto_files(snum
));
1118 set_namearray( &conn
->hide_list
, lp_hide_files(snum
));
1119 set_namearray( &conn
->veto_oplock_list
, lp_veto_oplocks(snum
));
1122 /* Invoke VFS make connection hook - do this before the VFS_STAT call
1123 to allow any filesystems needing user credentials to initialize
1126 if (SMB_VFS_CONNECT(conn
, lp_servicename(snum
), user
) < 0) {
1127 DEBUG(0,("make_connection: VFS make connection failed!\n"));
1128 *status
= NT_STATUS_UNSUCCESSFUL
;
1132 /* Any error exit after here needs to call the disconnect hook. */
1133 on_err_call_dis_hook
= true;
1135 /* win2000 does not check the permissions on the directory
1136 during the tree connect, instead relying on permission
1137 check during individual operations. To match this behaviour
1138 I have disabled this chdir check (tridge) */
1139 /* the alternative is just to check the directory exists */
1140 if ((ret
= SMB_VFS_STAT(conn
, conn
->connectpath
, &st
)) != 0 ||
1141 !S_ISDIR(st
.st_mode
)) {
1142 if (ret
== 0 && !S_ISDIR(st
.st_mode
)) {
1143 DEBUG(0,("'%s' is not a directory, when connecting to "
1144 "[%s]\n", conn
->connectpath
,
1145 lp_servicename(snum
)));
1147 DEBUG(0,("'%s' does not exist or permission denied "
1148 "when connecting to [%s] Error was %s\n",
1149 conn
->connectpath
, lp_servicename(snum
),
1152 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1156 string_set(&conn
->origpath
,conn
->connectpath
);
1158 #if SOFTLINK_OPTIMISATION
1159 /* resolve any soft links early if possible */
1160 if (vfs_ChDir(conn
,conn
->connectpath
) == 0) {
1161 TALLOC_CTX
*ctx
= talloc_tos();
1162 char *s
= vfs_GetWd(ctx
,s
);
1164 *status
= map_nt_error_from_unix(errno
);
1167 if (!set_conn_connectpath(conn
,s
)) {
1168 *status
= NT_STATUS_NO_MEMORY
;
1171 vfs_ChDir(conn
,conn
->connectpath
);
1175 /* Figure out the characteristics of the underlying filesystem. This
1176 * assumes that all the filesystem mounted withing a share path have
1177 * the same characteristics, which is likely but not guaranteed.
1180 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
);
1183 * Print out the 'connected as' stuff here as we need
1184 * to know the effective uid and gid we will be using
1185 * (at least initially).
1188 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
1189 dbgtext( "%s (%s) ", get_remote_machine_name(),
1190 conn
->client_address
);
1191 dbgtext( "%s", srv_is_signing_active() ? "signed " : "");
1192 dbgtext( "connect to service %s ", lp_servicename(snum
) );
1193 dbgtext( "initially as user %s ", user
);
1194 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1195 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1198 /* we've finished with the user stuff - go back to root */
1199 change_to_root_user();
1204 change_to_root_user();
1205 if (on_err_call_dis_hook
) {
1206 /* Call VFS disconnect hook */
1207 SMB_VFS_DISCONNECT(conn
);
1209 yield_connection(conn
, lp_servicename(snum
));
1214 /***************************************************************************************
1215 Simple wrapper function for make_connection() to include a call to
1217 **************************************************************************************/
1219 connection_struct
*make_connection_with_chdir(const char *service_in
,
1221 const char *dev
, uint16 vuid
,
1224 connection_struct
*conn
= NULL
;
1226 conn
= make_connection(service_in
, password
, dev
, vuid
, status
);
1229 * make_connection() does not change the directory for us any more
1230 * so we have to do it as a separate step --jerry
1233 if ( conn
&& vfs_ChDir(conn
,conn
->connectpath
) != 0 ) {
1234 DEBUG(0,("move_driver_to_download_area: Can't change "
1235 "directory to %s for [print$] (%s)\n",
1236 conn
->connectpath
,strerror(errno
)));
1237 yield_connection(conn
, lp_servicename(SNUM(conn
)));
1239 *status
= NT_STATUS_UNSUCCESSFUL
;
1246 /****************************************************************************
1247 Make a connection to a service.
1250 ****************************************************************************/
1252 connection_struct
*make_connection(const char *service_in
, DATA_BLOB password
,
1253 const char *pdev
, uint16 vuid
,
1257 user_struct
*vuser
= NULL
;
1261 char addr
[INET6_ADDRSTRLEN
];
1265 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1267 if (!non_root_mode() && (euid
= geteuid()) != 0) {
1268 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1269 "(%u)\n", (unsigned int)euid
));
1270 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1273 if (conn_num_open() > 2047) {
1274 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1278 if(lp_security() != SEC_SHARE
) {
1279 vuser
= get_valid_user_struct(vuid
);
1281 DEBUG(1,("make_connection: refusing to connect with "
1282 "no session setup\n"));
1283 *status
= NT_STATUS_ACCESS_DENIED
;
1288 /* Logic to try and connect to the correct [homes] share, preferably
1289 without too many getpwnam() lookups. This is particulary nasty for
1290 winbind usernames, where the share name isn't the same as unix
1293 The snum of the homes share is stored on the vuser at session setup
1297 if (strequal(service_in
,HOMES_NAME
)) {
1298 if(lp_security() != SEC_SHARE
) {
1299 DATA_BLOB no_pw
= data_blob_null
;
1300 if (vuser
->homes_snum
== -1) {
1301 DEBUG(2, ("[homes] share not available for "
1302 "this user because it was not found "
1303 "or created at session setup "
1305 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1308 DEBUG(5, ("making a connection to [homes] service "
1309 "created at session setup time\n"));
1310 return make_connection_snum(vuser
->homes_snum
,
1314 /* Security = share. Try with
1315 * current_user_info.smb_name as the username. */
1316 if (*current_user_info
.smb_name
) {
1317 fstring unix_username
;
1318 fstrcpy(unix_username
,
1319 current_user_info
.smb_name
);
1320 map_username(unix_username
);
1321 snum
= find_service(unix_username
);
1324 DEBUG(5, ("making a connection to 'homes' "
1325 "service %s based on "
1326 "security=share\n", service_in
));
1327 return make_connection_snum(snum
, NULL
,
1332 } else if ((lp_security() != SEC_SHARE
) && (vuser
->homes_snum
!= -1)
1333 && strequal(service_in
,
1334 lp_servicename(vuser
->homes_snum
))) {
1335 DATA_BLOB no_pw
= data_blob_null
;
1336 DEBUG(5, ("making a connection to 'homes' service [%s] "
1337 "created at session setup time\n", service_in
));
1338 return make_connection_snum(vuser
->homes_snum
,
1343 fstrcpy(service
, service_in
);
1345 strlower_m(service
);
1347 snum
= find_service(service
);
1350 if (strequal(service
,"IPC$") ||
1351 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1352 DEBUG(3,("refusing IPC connection to %s\n", service
));
1353 *status
= NT_STATUS_ACCESS_DENIED
;
1357 DEBUG(0,("%s (%s) couldn't find service %s\n",
1358 get_remote_machine_name(),
1359 client_addr(get_client_fd(),addr
,sizeof(addr
)),
1361 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1365 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1366 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum
) != '\0')) {
1367 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1368 "(pointing to %s)\n",
1369 service
, lp_msdfs_proxy(snum
)));
1370 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1374 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1376 return make_connection_snum(snum
, vuser
,
1381 /****************************************************************************
1383 ****************************************************************************/
1385 void close_cnum(connection_struct
*conn
, uint16 vuid
)
1388 pipe_close_conn(conn
);
1390 file_close_conn(conn
);
1391 dptr_closecnum(conn
);
1394 change_to_root_user();
1396 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1397 get_remote_machine_name(),
1398 conn
->client_address
,
1399 lp_servicename(SNUM(conn
))));
1401 /* Call VFS disconnect hook */
1402 SMB_VFS_DISCONNECT(conn
);
1404 yield_connection(conn
, lp_servicename(SNUM(conn
)));
1406 /* make sure we leave the directory available for unmount */
1407 vfs_ChDir(conn
, "/");
1409 /* execute any "postexec = " line */
1410 if (*lp_postexec(SNUM(conn
)) &&
1411 change_to_user(conn
, vuid
)) {
1412 char *cmd
= talloc_sub_advanced(talloc_tos(),
1413 lp_servicename(SNUM(conn
)), conn
->user
,
1414 conn
->connectpath
, conn
->gid
,
1415 get_current_username(),
1416 current_user_info
.domain
,
1417 lp_postexec(SNUM(conn
)));
1420 change_to_root_user();
1423 change_to_root_user();
1424 /* execute any "root postexec = " line */
1425 if (*lp_rootpostexec(SNUM(conn
))) {
1426 char *cmd
= talloc_sub_advanced(talloc_tos(),
1427 lp_servicename(SNUM(conn
)), conn
->user
,
1428 conn
->connectpath
, conn
->gid
,
1429 get_current_username(),
1430 current_user_info
.domain
,
1431 lp_rootpostexec(SNUM(conn
)));