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 "system/filesys.h"
22 #include "system/passwd.h" /* uid_wrapper */
23 #include "../lib/tsocket/tsocket.h"
24 #include "smbd/smbd.h"
25 #include "smbd/globals.h"
26 #include "../librpc/gen_ndr/netlogon.h"
27 #include "../libcli/security/security.h"
28 #include "printing/pcap.h"
29 #include "passdb/lookup_sid.h"
31 #include "lib/param/loadparm.h"
34 extern userdom_struct current_user_info
;
36 static bool canonicalize_connect_path(connection_struct
*conn
)
39 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
);
43 ret
= set_conn_connectpath(conn
,resolved_name
);
44 SAFE_FREE(resolved_name
);
48 /****************************************************************************
49 Ensure when setting connectpath it is a canonicalized (no ./ // or ../)
50 absolute path stating in / and not ending in /.
51 Observent people will notice a similarity between this and check_path_syntax :-).
52 ****************************************************************************/
54 bool set_conn_connectpath(connection_struct
*conn
, const char *connectpath
)
58 const char *s
= connectpath
;
59 bool start_of_name_component
= true;
61 if (connectpath
== NULL
|| connectpath
[0] == '\0') {
65 /* Allocate for strlen + '\0' + possible leading '/' */
66 destname
= (char *)SMB_MALLOC(strlen(connectpath
) + 2);
72 *d
++ = '/'; /* Always start with root. */
76 /* Eat multiple '/' */
80 if ((d
> destname
+ 1) && (*s
!= '\0')) {
83 start_of_name_component
= True
;
87 if (start_of_name_component
) {
88 if ((s
[0] == '.') && (s
[1] == '.') && (s
[2] == '/' || s
[2] == '\0')) {
89 /* Uh oh - "/../" or "/..\0" ! */
91 /* Go past the ../ or .. */
95 s
+= 2; /* Go past the .. */
98 /* If we just added a '/' - delete it */
99 if ((d
> destname
) && (*(d
-1) == '/')) {
104 /* Are we at the start ? Can't go back further if so. */
106 *d
++ = '/'; /* Can't delete root */
109 /* Go back one level... */
110 /* Decrement d first as d points to the *next* char to write into. */
111 for (d
--; d
> destname
; d
--) {
116 /* We're still at the start of a name component, just the previous one. */
118 } else if ((s
[0] == '.') && ((s
[1] == '\0') || s
[1] == '/')) {
119 /* Component of pathname can't be "." only - skip the '.' . */
133 /* Get the size of the next MB character. */
134 next_codepoint(s
,&siz
);
155 start_of_name_component
= false;
159 /* And must not end in '/' */
160 if (d
> destname
+ 1 && (*(d
-1) == '/')) {
164 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
165 lp_servicename(SNUM(conn
)), destname
));
167 string_set(&conn
->connectpath
, destname
);
172 /****************************************************************************
173 Load parameters specific to a connection/service.
174 ****************************************************************************/
176 bool set_current_service(connection_struct
*conn
, uint16 flags
, bool do_chdir
)
185 conn
->lastused_count
++;
190 vfs_ChDir(conn
,conn
->connectpath
) != 0 &&
191 vfs_ChDir(conn
,conn
->origpath
) != 0) {
192 DEBUG(((errno
!=EACCES
)?0:3),("chdir (%s) failed, reason: %s\n",
193 conn
->connectpath
, strerror(errno
)));
197 if ((conn
== last_conn
) && (last_flags
== flags
)) {
204 /* Obey the client case sensitivity requests - only for clients that support it. */
205 switch (lp_casesensitive(snum
)) {
208 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
209 enum remote_arch_types ra_type
= get_remote_arch();
210 if ((ra_type
!= RA_SAMBA
) && (ra_type
!= RA_CIFSFS
)) {
211 /* Client can't support per-packet case sensitive pathnames. */
212 conn
->case_sensitive
= False
;
214 conn
->case_sensitive
= !(flags
& FLAG_CASELESS_PATHNAMES
);
219 conn
->case_sensitive
= True
;
222 conn
->case_sensitive
= False
;
228 /****************************************************************************
229 do some basic sainity checks on the share.
230 This function modifies dev, ecode.
231 ****************************************************************************/
233 static NTSTATUS
share_sanity_checks(const struct tsocket_address
*remote_address
,
240 raddr
= tsocket_address_inet_addr_string(remote_address
,
243 return NT_STATUS_NO_MEMORY
;
246 if (!lp_snum_ok(snum
) ||
247 !allow_access(lp_hostsdeny(snum
), lp_hostsallow(snum
),
249 return NT_STATUS_ACCESS_DENIED
;
252 if (dev
[0] == '?' || !dev
[0]) {
253 if (lp_print_ok(snum
)) {
254 fstrcpy(dev
,"LPT1:");
255 } else if (strequal(lp_fstype(snum
), "IPC")) {
264 if (lp_print_ok(snum
)) {
265 if (!strequal(dev
, "LPT1:")) {
266 return NT_STATUS_BAD_DEVICE_TYPE
;
268 } else if (strequal(lp_fstype(snum
), "IPC")) {
269 if (!strequal(dev
, "IPC")) {
270 return NT_STATUS_BAD_DEVICE_TYPE
;
272 } else if (!strequal(dev
, "A:")) {
273 return NT_STATUS_BAD_DEVICE_TYPE
;
276 /* Behave as a printer if we are supposed to */
277 if (lp_print_ok(snum
) && (strcmp(dev
, "A:") == 0)) {
278 fstrcpy(dev
, "LPT1:");
285 * Go through lookup_name etc to find the force'd group.
287 * Create a new token from src_token, replacing the primary group sid with the
291 static NTSTATUS
find_forced_group(bool force_user
,
292 int snum
, const char *username
,
293 struct dom_sid
*pgroup_sid
,
296 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
297 TALLOC_CTX
*frame
= talloc_stackframe();
298 struct dom_sid group_sid
;
299 enum lsa_SidType type
;
301 bool user_must_be_member
= False
;
304 groupname
= talloc_strdup(talloc_tos(), lp_force_group(snum
));
305 if (groupname
== NULL
) {
306 DEBUG(1, ("talloc_strdup failed\n"));
307 result
= NT_STATUS_NO_MEMORY
;
311 if (groupname
[0] == '+') {
312 user_must_be_member
= True
;
316 groupname
= talloc_string_sub(talloc_tos(), groupname
,
317 "%S", lp_servicename(snum
));
318 if (groupname
== NULL
) {
319 DEBUG(1, ("talloc_string_sub failed\n"));
320 result
= NT_STATUS_NO_MEMORY
;
324 if (!lookup_name_smbconf(talloc_tos(), groupname
,
325 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
326 NULL
, NULL
, &group_sid
, &type
)) {
327 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
332 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
333 (type
!= SID_NAME_WKN_GRP
)) {
334 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
335 sid_type_lookup(type
)));
339 if (!sid_to_gid(&group_sid
, &gid
)) {
340 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
341 sid_string_dbg(&group_sid
), groupname
));
346 * If the user has been forced and the forced group starts with a '+',
347 * then we only set the group to be the forced group if the forced
348 * user is a member of that group. Otherwise, the meaning of the '+'
352 if (force_user
&& user_must_be_member
) {
353 if (user_in_group_sid(username
, &group_sid
)) {
354 sid_copy(pgroup_sid
, &group_sid
);
356 DEBUG(3,("Forced group %s for member %s\n",
357 groupname
, username
));
359 DEBUG(0,("find_forced_group: forced user %s is not a member "
360 "of forced group %s. Disallowing access.\n",
361 username
, groupname
));
362 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
366 sid_copy(pgroup_sid
, &group_sid
);
368 DEBUG(3,("Forced group %s\n", groupname
));
371 result
= NT_STATUS_OK
;
377 /****************************************************************************
378 Create an auth_session_info structure for a connection_struct
379 ****************************************************************************/
381 static NTSTATUS
create_connection_session_info(struct smbd_server_connection
*sconn
,
382 TALLOC_CTX
*mem_ctx
, int snum
,
383 struct auth_session_info
*session_info
,
384 struct auth_session_info
**presult
)
386 struct auth_session_info
*result
;
388 if (lp_guest_only(snum
)) {
389 return make_session_info_guest(mem_ctx
, presult
);
393 * This is the normal security != share case where we have a
394 * valid vuid from the session setup. */
396 if (security_session_user_level(session_info
, NULL
) < SECURITY_USER
) {
397 if (!lp_guest_ok(snum
)) {
398 DEBUG(2, ("guest user (from session setup) "
399 "not permitted to access this share "
400 "(%s)\n", lp_servicename(snum
)));
401 return NT_STATUS_ACCESS_DENIED
;
404 if (!user_ok_token(session_info
->unix_info
->unix_name
,
405 session_info
->info
->domain_name
,
406 session_info
->security_token
, snum
)) {
407 DEBUG(2, ("user '%s' (from session setup) not "
408 "permitted to access this share "
410 session_info
->unix_info
->unix_name
,
411 lp_servicename(snum
)));
412 return NT_STATUS_ACCESS_DENIED
;
416 result
= copy_session_info(mem_ctx
, session_info
);
417 if (result
== NULL
) {
418 return NT_STATUS_NO_MEMORY
;
425 /****************************************************************************
426 set relavent user and group settings corresponding to force user/group
427 configuration for the given snum.
428 ****************************************************************************/
430 NTSTATUS
set_conn_force_user_group(connection_struct
*conn
, int snum
)
434 if (*lp_force_user(snum
)) {
437 * Replace conn->session_info with a completely faked up one
438 * from the username we are forced into :-)
442 char *sanitized_username
;
443 struct auth_session_info
*forced_serverinfo
;
446 fuser
= talloc_string_sub(conn
, lp_force_user(snum
), "%S",
447 lp_const_servicename(snum
));
449 return NT_STATUS_NO_MEMORY
;
452 guest
= security_session_user_level(conn
->session_info
, NULL
) < SECURITY_USER
;
454 status
= make_session_info_from_username(
458 if (!NT_STATUS_IS_OK(status
)) {
462 /* We don't want to replace the original sanitized_username
463 as it is the original user given in the connect attempt.
464 This is used in '%U' substitutions. */
465 sanitized_username
= discard_const_p(char,
466 forced_serverinfo
->unix_info
->sanitized_username
);
467 TALLOC_FREE(sanitized_username
);
468 forced_serverinfo
->unix_info
->sanitized_username
=
469 talloc_move(forced_serverinfo
->unix_info
,
470 &conn
->session_info
->unix_info
->sanitized_username
);
472 TALLOC_FREE(conn
->session_info
);
473 conn
->session_info
= forced_serverinfo
;
475 conn
->force_user
= true;
476 DEBUG(3,("Forced user %s\n", fuser
));
480 * If force group is true, then override
481 * any groupid stored for the connecting user.
484 if (*lp_force_group(snum
)) {
486 status
= find_forced_group(
487 conn
->force_user
, snum
, conn
->session_info
->unix_info
->unix_name
,
488 &conn
->session_info
->security_token
->sids
[1],
489 &conn
->session_info
->unix_token
->gid
);
491 if (!NT_STATUS_IS_OK(status
)) {
496 * We need to cache this gid, to use within
497 * change_to_user() separately from the conn->session_info
498 * struct. We only use conn->session_info directly if
499 * "force_user" was set.
501 conn
->force_group_gid
= conn
->session_info
->unix_token
->gid
;
507 /****************************************************************************
508 Setup the share access mask for a connection.
509 ****************************************************************************/
511 static void create_share_access_mask(connection_struct
*conn
, int snum
)
513 const struct security_token
*token
= conn
->session_info
->security_token
;
515 share_access_check(token
,
516 lp_servicename(snum
),
517 MAXIMUM_ALLOWED_ACCESS
,
518 &conn
->share_access
);
520 if (security_token_has_privilege(token
, SEC_PRIV_SECURITY
)) {
521 conn
->share_access
|= SEC_FLAG_SYSTEM_SECURITY
;
523 if (security_token_has_privilege(token
, SEC_PRIV_RESTORE
)) {
524 conn
->share_access
|= (SEC_RIGHTS_PRIV_RESTORE
);
526 if (security_token_has_privilege(token
, SEC_PRIV_BACKUP
)) {
527 conn
->share_access
|= (SEC_RIGHTS_PRIV_BACKUP
);
529 if (security_token_has_privilege(token
, SEC_PRIV_TAKE_OWNERSHIP
)) {
530 conn
->share_access
|= (SEC_STD_WRITE_OWNER
);
534 /****************************************************************************
535 Make a connection, given the snum to connect to, and the vuser of the
536 connecting user if appropriate.
537 ****************************************************************************/
539 static NTSTATUS
make_connection_snum(struct smbd_server_connection
*sconn
,
540 connection_struct
*conn
,
541 int snum
, user_struct
*vuser
,
544 struct smb_filename
*smb_fname_cpath
= NULL
;
547 bool on_err_call_dis_hook
= false;
548 bool claimed_connection
= false;
555 status
= share_sanity_checks(sconn
->remote_address
,
556 sconn
->remote_hostname
,
559 if (NT_STATUS_IS_ERR(status
)) {
563 conn
->params
->service
= snum
;
565 status
= create_connection_session_info(sconn
,
566 conn
, snum
, vuser
->session_info
,
567 &conn
->session_info
);
569 if (!NT_STATUS_IS_OK(status
)) {
570 DEBUG(1, ("create_connection_session_info failed: %s\n",
575 if (lp_guest_only(snum
)) {
576 conn
->force_user
= true;
579 conn
->num_files_open
= 0;
580 conn
->lastused
= conn
->lastused_count
= time(NULL
);
582 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
583 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
584 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
586 /* Case options for the share. */
587 if (lp_casesensitive(snum
) == Auto
) {
588 /* We will be setting this per packet. Set to be case
589 * insensitive for now. */
590 conn
->case_sensitive
= False
;
592 conn
->case_sensitive
= (bool)lp_casesensitive(snum
);
595 conn
->case_preserve
= lp_preservecase(snum
);
596 conn
->short_case_preserve
= lp_shortpreservecase(snum
);
598 conn
->encrypt_level
= lp_smb_encrypt(snum
);
600 conn
->veto_list
= NULL
;
601 conn
->hide_list
= NULL
;
602 conn
->veto_oplock_list
= NULL
;
603 conn
->aio_write_behind_list
= NULL
;
605 conn
->read_only
= lp_readonly(SNUM(conn
));
607 status
= set_conn_force_user_group(conn
, snum
);
608 if (!NT_STATUS_IS_OK(status
)) {
612 conn
->vuid
= vuser
->vuid
;
615 char *s
= talloc_sub_advanced(talloc_tos(),
616 lp_servicename(SNUM(conn
)),
617 conn
->session_info
->unix_info
->unix_name
,
619 conn
->session_info
->unix_token
->gid
,
620 conn
->session_info
->unix_info
->sanitized_username
,
621 conn
->session_info
->info
->domain_name
,
624 status
= NT_STATUS_NO_MEMORY
;
628 if (!set_conn_connectpath(conn
,s
)) {
630 status
= NT_STATUS_NO_MEMORY
;
633 DEBUG(3,("Connect path is '%s' for service [%s]\n",s
,
634 lp_servicename(snum
)));
639 * New code to check if there's a share security descripter
640 * added from NT server manager. This is done after the
641 * smb.conf checks are done as we need a uid and token. JRA.
645 create_share_access_mask(conn
, snum
);
647 if ((conn
->share_access
& FILE_WRITE_DATA
) == 0) {
648 if ((conn
->share_access
& FILE_READ_DATA
) == 0) {
649 /* No access, read or write. */
650 DEBUG(0,("make_connection: connection to %s "
651 "denied due to security "
653 lp_servicename(snum
)));
654 status
= NT_STATUS_ACCESS_DENIED
;
657 conn
->read_only
= True
;
660 /* Initialise VFS function pointers */
662 if (!smbd_vfs_init(conn
)) {
663 DEBUG(0, ("vfs_init failed for service %s\n",
664 lp_servicename(snum
)));
665 status
= NT_STATUS_BAD_NETWORK_NAME
;
669 /* ROOT Activities: */
670 /* explicitly check widelinks here so that we can correctly warn
672 widelinks_warning(snum
);
675 * Enforce the max connections parameter.
678 if ((lp_max_connections(snum
) > 0)
679 && (count_current_connections(lp_servicename(SNUM(conn
)), True
) >=
680 lp_max_connections(snum
))) {
682 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
683 lp_max_connections(snum
), lp_servicename(snum
)));
684 status
= NT_STATUS_INSUFFICIENT_RESOURCES
;
689 * Get us an entry in the connections db
691 if (!claim_connection(conn
, lp_servicename(snum
))) {
692 DEBUG(1, ("Could not store connections entry\n"));
693 status
= NT_STATUS_INTERNAL_DB_ERROR
;
696 claimed_connection
= true;
698 /* Invoke VFS make connection hook - this must be the first
699 filesystem operation that we do. */
701 if (SMB_VFS_CONNECT(conn
, lp_servicename(snum
),
702 conn
->session_info
->unix_info
->unix_name
) < 0) {
703 DEBUG(0,("make_connection: VFS make connection failed!\n"));
704 status
= NT_STATUS_UNSUCCESSFUL
;
708 /* Any error exit after here needs to call the disconnect hook. */
709 on_err_call_dis_hook
= true;
711 if ((!conn
->printer
) && (!conn
->ipc
) &&
712 lp_change_notify(conn
->params
)) {
713 if (sconn
->notify_ctx
== NULL
) {
714 sconn
->notify_ctx
= notify_init(
715 sconn
, sconn
->msg_ctx
, sconn
->ev_ctx
);
717 if (sconn
->sys_notify_ctx
== NULL
) {
718 sconn
->sys_notify_ctx
= sys_notify_context_create(
719 sconn
, sconn
->ev_ctx
);
723 if (lp_kernel_oplocks(snum
)) {
724 init_kernel_oplocks(conn
->sconn
);
728 * Fix compatibility issue pointed out by Volker.
729 * We pass the conn->connectpath to the preexec
730 * scripts as a parameter, so attempt to canonicalize
731 * it here before calling the preexec scripts.
732 * We ignore errors here, as it is possible that
733 * the conn->connectpath doesn't exist yet and
734 * the preexec scripts will create them.
737 (void)canonicalize_connect_path(conn
);
739 /* Preexecs are done here as they might make the dir we are to ChDir
741 /* execute any "root preexec = " line */
742 if (*lp_rootpreexec(snum
)) {
743 char *cmd
= talloc_sub_advanced(talloc_tos(),
744 lp_servicename(SNUM(conn
)),
745 conn
->session_info
->unix_info
->unix_name
,
747 conn
->session_info
->unix_token
->gid
,
748 conn
->session_info
->unix_info
->sanitized_username
,
749 conn
->session_info
->info
->domain_name
,
750 lp_rootpreexec(snum
));
751 DEBUG(5,("cmd=%s\n",cmd
));
752 ret
= smbrun(cmd
,NULL
);
754 if (ret
!= 0 && lp_rootpreexec_close(snum
)) {
755 DEBUG(1,("root preexec gave %d - failing "
756 "connection\n", ret
));
757 status
= NT_STATUS_ACCESS_DENIED
;
762 /* USER Activites: */
763 if (!change_to_user(conn
, conn
->vuid
)) {
764 /* No point continuing if they fail the basic checks */
765 DEBUG(0,("Can't become connected user!\n"));
766 status
= NT_STATUS_LOGON_FAILURE
;
773 /* Remember that a different vuid can connect later without these
776 /* Preexecs are done here as they might make the dir we are to ChDir
779 /* execute any "preexec = " line */
780 if (*lp_preexec(snum
)) {
781 char *cmd
= talloc_sub_advanced(talloc_tos(),
782 lp_servicename(SNUM(conn
)),
783 conn
->session_info
->unix_info
->unix_name
,
785 conn
->session_info
->unix_token
->gid
,
786 conn
->session_info
->unix_info
->sanitized_username
,
787 conn
->session_info
->info
->domain_name
,
789 ret
= smbrun(cmd
,NULL
);
791 if (ret
!= 0 && lp_preexec_close(snum
)) {
792 DEBUG(1,("preexec gave %d - failing connection\n",
794 status
= NT_STATUS_ACCESS_DENIED
;
799 #ifdef WITH_FAKE_KASERVER
800 if (lp_afs_share(snum
)) {
806 * we've finished with the user stuff - go back to root
807 * so the SMB_VFS_STAT call will only fail on path errors,
808 * not permission problems.
810 change_to_root_user();
811 /* ROOT Activites: */
814 * If widelinks are disallowed we need to canonicalise the connect
815 * path here to ensure we don't have any symlinks in the
816 * connectpath. We will be checking all paths on this connection are
817 * below this directory. We must do this after the VFS init as we
818 * depend on the realpath() pointer in the vfs table. JRA.
820 if (!lp_widelinks(snum
)) {
821 if (!canonicalize_connect_path(conn
)) {
822 DEBUG(0, ("canonicalize_connect_path failed "
823 "for service %s, path %s\n",
824 lp_servicename(snum
),
826 status
= NT_STATUS_BAD_NETWORK_NAME
;
831 /* Add veto/hide lists */
832 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
833 set_namearray( &conn
->veto_list
, lp_veto_files(snum
));
834 set_namearray( &conn
->hide_list
, lp_hide_files(snum
));
835 set_namearray( &conn
->veto_oplock_list
, lp_veto_oplocks(snum
));
836 set_namearray( &conn
->aio_write_behind_list
,
837 lp_aio_write_behind(snum
));
839 status
= create_synthetic_smb_fname(talloc_tos(), conn
->connectpath
,
840 NULL
, NULL
, &smb_fname_cpath
);
841 if (!NT_STATUS_IS_OK(status
)) {
845 /* win2000 does not check the permissions on the directory
846 during the tree connect, instead relying on permission
847 check during individual operations. To match this behaviour
848 I have disabled this chdir check (tridge) */
849 /* the alternative is just to check the directory exists */
851 if ((ret
= SMB_VFS_STAT(conn
, smb_fname_cpath
)) != 0 ||
852 !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
853 if (ret
== 0 && !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
854 DEBUG(0,("'%s' is not a directory, when connecting to "
855 "[%s]\n", conn
->connectpath
,
856 lp_servicename(snum
)));
858 DEBUG(0,("'%s' does not exist or permission denied "
859 "when connecting to [%s] Error was %s\n",
860 conn
->connectpath
, lp_servicename(snum
),
863 status
= NT_STATUS_BAD_NETWORK_NAME
;
866 conn
->base_share_dev
= smb_fname_cpath
->st
.st_ex_dev
;
868 string_set(&conn
->origpath
,conn
->connectpath
);
870 /* Figure out the characteristics of the underlying filesystem. This
871 * assumes that all the filesystem mounted withing a share path have
872 * the same characteristics, which is likely but not guaranteed.
875 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
, &conn
->ts_res
);
878 * Print out the 'connected as' stuff here as we need
879 * to know the effective uid and gid we will be using
880 * (at least initially).
883 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 1 ) ) {
884 dbgtext( "%s (%s) ", get_remote_machine_name(),
885 tsocket_address_string(conn
->sconn
->remote_address
,
887 dbgtext( "%s", srv_is_signing_active(sconn
) ? "signed " : "");
888 dbgtext( "connect to service %s ", lp_servicename(snum
) );
889 dbgtext( "initially as user %s ",
890 conn
->session_info
->unix_info
->unix_name
);
891 dbgtext( "(uid=%d, gid=%d) ", (int)effuid
, (int)effgid
);
892 dbgtext( "(pid %d)\n", (int)getpid() );
899 TALLOC_FREE(smb_fname_cpath
);
900 /* We must exit this function as root. */
901 if (geteuid() != 0) {
902 change_to_root_user();
904 if (on_err_call_dis_hook
) {
905 /* Call VFS disconnect hook */
906 SMB_VFS_DISCONNECT(conn
);
908 if (claimed_connection
) {
909 yield_connection(conn
, lp_servicename(snum
));
914 /****************************************************************************
915 Make a connection to a service from SMB1. Internal interface.
916 ****************************************************************************/
918 static connection_struct
*make_connection_smb1(struct smbd_server_connection
*sconn
,
919 int snum
, user_struct
*vuser
,
923 connection_struct
*conn
= conn_new(sconn
);
925 DEBUG(0,("make_connection_smb1: Couldn't find free connection.\n"));
926 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
929 *pstatus
= make_connection_snum(sconn
,
934 if (!NT_STATUS_IS_OK(*pstatus
)) {
941 /****************************************************************************
942 Make a connection to a service from SMB2. External SMB2 interface.
943 We must set cnum before claiming connection.
944 ****************************************************************************/
946 connection_struct
*make_connection_smb2(struct smbd_server_connection
*sconn
,
947 struct smbd_smb2_tcon
*tcon
,
952 connection_struct
*conn
= conn_new(sconn
);
954 DEBUG(0,("make_connection_smb2: Couldn't find free connection.\n"));
955 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
958 conn
->cnum
= tcon
->tid
;
959 *pstatus
= make_connection_snum(sconn
,
964 if (!NT_STATUS_IS_OK(*pstatus
)) {
971 /****************************************************************************
972 Make a connection to a service. External SMB1 interface.
975 ****************************************************************************/
977 connection_struct
*make_connection(struct smbd_server_connection
*sconn
,
978 const char *service_in
,
979 const char *pdev
, uint16 vuid
,
983 user_struct
*vuser
= NULL
;
984 char *service
= NULL
;
990 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
992 if (!non_root_mode() && (euid
= geteuid()) != 0) {
993 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
994 "(%u)\n", (unsigned int)euid
));
995 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
998 if (conn_num_open(sconn
) > 2047) {
999 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1003 vuser
= get_valid_user_struct(sconn
, vuid
);
1005 DEBUG(1,("make_connection: refusing to connect with "
1006 "no session setup\n"));
1007 *status
= NT_STATUS_ACCESS_DENIED
;
1011 /* Logic to try and connect to the correct [homes] share, preferably
1012 without too many getpwnam() lookups. This is particulary nasty for
1013 winbind usernames, where the share name isn't the same as unix
1016 The snum of the homes share is stored on the vuser at session setup
1020 if (strequal(service_in
,HOMES_NAME
)) {
1021 if (vuser
->homes_snum
== -1) {
1022 DEBUG(2, ("[homes] share not available for "
1023 "this user because it was not found "
1024 "or created at session setup "
1026 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1029 DEBUG(5, ("making a connection to [homes] service "
1030 "created at session setup time\n"));
1031 return make_connection_smb1(sconn
,
1035 } else if ((vuser
->homes_snum
!= -1)
1036 && strequal(service_in
,
1037 lp_servicename(vuser
->homes_snum
))) {
1038 DEBUG(5, ("making a connection to 'homes' service [%s] "
1039 "created at session setup time\n", service_in
));
1040 return make_connection_smb1(sconn
,
1046 service
= talloc_strdup(talloc_tos(), service_in
);
1048 *status
= NT_STATUS_NO_MEMORY
;
1052 strlower_m(service
);
1054 snum
= find_service(talloc_tos(), service
, &service
);
1056 *status
= NT_STATUS_NO_MEMORY
;
1061 if (strequal(service
,"IPC$") ||
1062 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1063 DEBUG(3,("refusing IPC connection to %s\n", service
));
1064 *status
= NT_STATUS_ACCESS_DENIED
;
1068 DEBUG(3,("%s (%s) couldn't find service %s\n",
1069 get_remote_machine_name(),
1070 tsocket_address_string(
1071 sconn
->remote_address
, talloc_tos()),
1073 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1077 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1078 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum
) != '\0')) {
1079 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1080 "(pointing to %s)\n",
1081 service
, lp_msdfs_proxy(snum
)));
1082 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1086 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1088 return make_connection_smb1(sconn
, snum
, vuser
,
1092 /****************************************************************************
1094 ****************************************************************************/
1096 void close_cnum(connection_struct
*conn
, uint16 vuid
)
1098 file_close_conn(conn
);
1100 if (!IS_IPC(conn
)) {
1101 dptr_closecnum(conn
);
1104 change_to_root_user();
1106 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1107 get_remote_machine_name(),
1108 tsocket_address_string(conn
->sconn
->remote_address
,
1110 lp_servicename(SNUM(conn
))));
1112 /* Call VFS disconnect hook */
1113 SMB_VFS_DISCONNECT(conn
);
1115 yield_connection(conn
, lp_servicename(SNUM(conn
)));
1117 /* make sure we leave the directory available for unmount */
1118 vfs_ChDir(conn
, "/");
1120 /* execute any "postexec = " line */
1121 if (*lp_postexec(SNUM(conn
)) &&
1122 change_to_user(conn
, vuid
)) {
1123 char *cmd
= talloc_sub_advanced(talloc_tos(),
1124 lp_servicename(SNUM(conn
)),
1125 conn
->session_info
->unix_info
->unix_name
,
1127 conn
->session_info
->unix_token
->gid
,
1128 conn
->session_info
->unix_info
->sanitized_username
,
1129 conn
->session_info
->info
->domain_name
,
1130 lp_postexec(SNUM(conn
)));
1133 change_to_root_user();
1136 change_to_root_user();
1137 /* execute any "root postexec = " line */
1138 if (*lp_rootpostexec(SNUM(conn
))) {
1139 char *cmd
= talloc_sub_advanced(talloc_tos(),
1140 lp_servicename(SNUM(conn
)),
1141 conn
->session_info
->unix_info
->unix_name
,
1143 conn
->session_info
->unix_token
->gid
,
1144 conn
->session_info
->unix_info
->sanitized_username
,
1145 conn
->session_info
->info
->domain_name
,
1146 lp_rootpostexec(SNUM(conn
)));