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 static bool canonicalize_connect_path(connection_struct
*conn
)
37 char *resolved_name
= SMB_VFS_REALPATH(conn
,conn
->connectpath
);
41 ret
= set_conn_connectpath(conn
,resolved_name
);
42 SAFE_FREE(resolved_name
);
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
= (char *)talloc_size(conn
, 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(talloc_tos(), SNUM(conn
)), destname
));
165 talloc_free(conn
->connectpath
);
166 conn
->connectpath
= destname
;
167 /* Ensure conn->cwd is initialized - start as conn->connectpath. */
168 TALLOC_FREE(conn
->cwd
);
169 conn
->cwd
= talloc_strdup(conn
, conn
->connectpath
);
176 /****************************************************************************
177 Load parameters specific to a connection/service.
178 ****************************************************************************/
180 bool set_current_service(connection_struct
*conn
, uint16 flags
, bool do_chdir
)
189 conn
->lastused_count
++;
194 vfs_ChDir(conn
,conn
->connectpath
) != 0 &&
195 vfs_ChDir(conn
,conn
->origpath
) != 0) {
196 DEBUG(((errno
!=EACCES
)?0:3),("chdir (%s) failed, reason: %s\n",
197 conn
->connectpath
, strerror(errno
)));
201 if ((conn
== last_conn
) && (last_flags
== flags
)) {
208 /* Obey the client case sensitivity requests - only for clients that support it. */
209 switch (lp_case_sensitive(snum
)) {
212 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
213 enum remote_arch_types ra_type
= get_remote_arch();
214 if ((ra_type
!= RA_SAMBA
) && (ra_type
!= RA_CIFSFS
)) {
215 /* Client can't support per-packet case sensitive pathnames. */
216 conn
->case_sensitive
= False
;
218 conn
->case_sensitive
= !(flags
& FLAG_CASELESS_PATHNAMES
);
223 conn
->case_sensitive
= True
;
226 conn
->case_sensitive
= False
;
232 /****************************************************************************
233 do some basic sainity checks on the share.
234 This function modifies dev, ecode.
235 ****************************************************************************/
237 static NTSTATUS
share_sanity_checks(const struct tsocket_address
*remote_address
,
244 raddr
= tsocket_address_inet_addr_string(remote_address
,
247 return NT_STATUS_NO_MEMORY
;
250 if (!lp_snum_ok(snum
) ||
251 !allow_access(lp_hosts_deny(snum
), lp_hosts_allow(snum
),
253 return NT_STATUS_ACCESS_DENIED
;
256 if (dev
[0] == '?' || !dev
[0]) {
257 if (lp_printable(snum
)) {
258 fstrcpy(dev
,"LPT1:");
259 } else if (strequal(lp_fstype(snum
), "IPC")) {
266 if (!strupper_m(dev
)) {
267 DEBUG(2,("strupper_m %s failed\n", dev
));
268 return NT_STATUS_INVALID_PARAMETER
;
271 if (lp_printable(snum
)) {
272 if (!strequal(dev
, "LPT1:")) {
273 return NT_STATUS_BAD_DEVICE_TYPE
;
275 } else if (strequal(lp_fstype(snum
), "IPC")) {
276 if (!strequal(dev
, "IPC")) {
277 return NT_STATUS_BAD_DEVICE_TYPE
;
279 } else if (!strequal(dev
, "A:")) {
280 return NT_STATUS_BAD_DEVICE_TYPE
;
283 /* Behave as a printer if we are supposed to */
284 if (lp_printable(snum
) && (strcmp(dev
, "A:") == 0)) {
285 fstrcpy(dev
, "LPT1:");
292 * Go through lookup_name etc to find the force'd group.
294 * Create a new token from src_token, replacing the primary group sid with the
298 static NTSTATUS
find_forced_group(bool force_user
,
299 int snum
, const char *username
,
300 struct dom_sid
*pgroup_sid
,
303 NTSTATUS result
= NT_STATUS_NO_SUCH_GROUP
;
304 TALLOC_CTX
*frame
= talloc_stackframe();
305 struct dom_sid group_sid
;
306 enum lsa_SidType type
;
308 bool user_must_be_member
= False
;
311 groupname
= lp_force_group(talloc_tos(), snum
);
312 if (groupname
== NULL
) {
313 DEBUG(1, ("talloc_strdup failed\n"));
314 result
= NT_STATUS_NO_MEMORY
;
318 if (groupname
[0] == '+') {
319 user_must_be_member
= True
;
323 groupname
= talloc_string_sub(talloc_tos(), groupname
,
324 "%S", lp_servicename(talloc_tos(), snum
));
325 if (groupname
== NULL
) {
326 DEBUG(1, ("talloc_string_sub failed\n"));
327 result
= NT_STATUS_NO_MEMORY
;
331 if (!lookup_name_smbconf(talloc_tos(), groupname
,
332 LOOKUP_NAME_ALL
|LOOKUP_NAME_GROUP
,
333 NULL
, NULL
, &group_sid
, &type
)) {
334 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
339 if ((type
!= SID_NAME_DOM_GRP
) && (type
!= SID_NAME_ALIAS
) &&
340 (type
!= SID_NAME_WKN_GRP
)) {
341 DEBUG(10, ("%s is a %s, not a group\n", groupname
,
342 sid_type_lookup(type
)));
346 if (!sid_to_gid(&group_sid
, &gid
)) {
347 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
348 sid_string_dbg(&group_sid
), groupname
));
353 * If the user has been forced and the forced group starts with a '+',
354 * then we only set the group to be the forced group if the forced
355 * user is a member of that group. Otherwise, the meaning of the '+'
359 if (force_user
&& user_must_be_member
) {
360 if (user_in_group_sid(username
, &group_sid
)) {
361 sid_copy(pgroup_sid
, &group_sid
);
363 DEBUG(3,("Forced group %s for member %s\n",
364 groupname
, username
));
366 DEBUG(0,("find_forced_group: forced user %s is not a member "
367 "of forced group %s. Disallowing access.\n",
368 username
, groupname
));
369 result
= NT_STATUS_MEMBER_NOT_IN_GROUP
;
373 sid_copy(pgroup_sid
, &group_sid
);
375 DEBUG(3,("Forced group %s\n", groupname
));
378 result
= NT_STATUS_OK
;
384 /****************************************************************************
385 Create an auth_session_info structure for a connection_struct
386 ****************************************************************************/
388 static NTSTATUS
create_connection_session_info(struct smbd_server_connection
*sconn
,
389 TALLOC_CTX
*mem_ctx
, int snum
,
390 struct auth_session_info
*session_info
,
391 struct auth_session_info
**presult
)
393 struct auth_session_info
*result
;
395 if (lp_guest_only(snum
)) {
396 return make_session_info_guest(mem_ctx
, presult
);
400 * This is the normal security != share case where we have a
401 * valid vuid from the session setup. */
403 if (security_session_user_level(session_info
, NULL
) < SECURITY_USER
) {
404 if (!lp_guest_ok(snum
)) {
405 DEBUG(2, ("guest user (from session setup) "
406 "not permitted to access this share "
407 "(%s)\n", lp_servicename(talloc_tos(), snum
)));
408 return NT_STATUS_ACCESS_DENIED
;
411 if (!user_ok_token(session_info
->unix_info
->unix_name
,
412 session_info
->info
->domain_name
,
413 session_info
->security_token
, snum
)) {
414 DEBUG(2, ("user '%s' (from session setup) not "
415 "permitted to access this share "
417 session_info
->unix_info
->unix_name
,
418 lp_servicename(talloc_tos(), snum
)));
419 return NT_STATUS_ACCESS_DENIED
;
423 result
= copy_session_info(mem_ctx
, session_info
);
424 if (result
== NULL
) {
425 return NT_STATUS_NO_MEMORY
;
432 /****************************************************************************
433 Set relevant user and group settings corresponding to force user/group
434 configuration for the given snum.
435 ****************************************************************************/
437 NTSTATUS
set_conn_force_user_group(connection_struct
*conn
, int snum
)
441 if (*lp_force_user(talloc_tos(), snum
)) {
444 * Replace conn->session_info with a completely faked up one
445 * from the username we are forced into :-)
449 char *sanitized_username
;
450 struct auth_session_info
*forced_serverinfo
;
453 fuser
= talloc_string_sub(conn
, lp_force_user(talloc_tos(), snum
), "%S",
454 lp_const_servicename(snum
));
456 return NT_STATUS_NO_MEMORY
;
459 guest
= security_session_user_level(conn
->session_info
, NULL
) < SECURITY_USER
;
461 status
= make_session_info_from_username(
465 if (!NT_STATUS_IS_OK(status
)) {
469 /* We don't want to replace the original sanitized_username
470 as it is the original user given in the connect attempt.
471 This is used in '%U' substitutions. */
472 sanitized_username
= discard_const_p(char,
473 forced_serverinfo
->unix_info
->sanitized_username
);
474 TALLOC_FREE(sanitized_username
);
475 forced_serverinfo
->unix_info
->sanitized_username
=
476 talloc_move(forced_serverinfo
->unix_info
,
477 &conn
->session_info
->unix_info
->sanitized_username
);
479 TALLOC_FREE(conn
->session_info
);
480 conn
->session_info
= forced_serverinfo
;
482 conn
->force_user
= true;
483 DEBUG(3,("Forced user %s\n", fuser
));
487 * If force group is true, then override
488 * any groupid stored for the connecting user.
491 if (*lp_force_group(talloc_tos(), snum
)) {
493 status
= find_forced_group(
494 conn
->force_user
, snum
, conn
->session_info
->unix_info
->unix_name
,
495 &conn
->session_info
->security_token
->sids
[1],
496 &conn
->session_info
->unix_token
->gid
);
498 if (!NT_STATUS_IS_OK(status
)) {
503 * We need to cache this gid, to use within
504 * change_to_user() separately from the conn->session_info
505 * struct. We only use conn->session_info directly if
506 * "force_user" was set.
508 conn
->force_group_gid
= conn
->session_info
->unix_token
->gid
;
514 /****************************************************************************
515 Make a connection, given the snum to connect to, and the vuser of the
516 connecting user if appropriate.
517 ****************************************************************************/
519 static NTSTATUS
make_connection_snum(struct smbd_server_connection
*sconn
,
520 connection_struct
*conn
,
521 int snum
, struct user_struct
*vuser
,
524 struct smb_filename
*smb_fname_cpath
= NULL
;
527 bool on_err_call_dis_hook
= false;
534 status
= share_sanity_checks(sconn
->remote_address
,
535 sconn
->remote_hostname
,
538 if (NT_STATUS_IS_ERR(status
)) {
542 conn
->params
->service
= snum
;
544 status
= create_connection_session_info(sconn
,
545 conn
, snum
, vuser
->session_info
,
546 &conn
->session_info
);
548 if (!NT_STATUS_IS_OK(status
)) {
549 DEBUG(1, ("create_connection_session_info failed: %s\n",
554 if (lp_guest_only(snum
)) {
555 conn
->force_user
= true;
558 conn
->num_files_open
= 0;
559 conn
->lastused
= conn
->lastused_count
= time(NULL
);
560 conn
->printer
= (strncmp(dev
,"LPT",3) == 0);
561 conn
->ipc
= ( (strncmp(dev
,"IPC",3) == 0) ||
562 ( lp_enable_asu_support() && strequal(dev
,"ADMIN$")) );
564 /* Case options for the share. */
565 if (lp_case_sensitive(snum
) == Auto
) {
566 /* We will be setting this per packet. Set to be case
567 * insensitive for now. */
568 conn
->case_sensitive
= False
;
570 conn
->case_sensitive
= (bool)lp_case_sensitive(snum
);
573 conn
->case_preserve
= lp_preserve_case(snum
);
574 conn
->short_case_preserve
= lp_short_preserve_case(snum
);
576 conn
->encrypt_level
= lp_smb_encrypt(snum
);
578 conn
->veto_list
= NULL
;
579 conn
->hide_list
= NULL
;
580 conn
->veto_oplock_list
= NULL
;
581 conn
->aio_write_behind_list
= NULL
;
583 conn
->read_only
= lp_read_only(SNUM(conn
));
585 status
= set_conn_force_user_group(conn
, snum
);
586 if (!NT_STATUS_IS_OK(status
)) {
590 conn
->vuid
= vuser
->vuid
;
593 char *s
= talloc_sub_advanced(talloc_tos(),
594 lp_servicename(talloc_tos(), SNUM(conn
)),
595 conn
->session_info
->unix_info
->unix_name
,
597 conn
->session_info
->unix_token
->gid
,
598 conn
->session_info
->unix_info
->sanitized_username
,
599 conn
->session_info
->info
->domain_name
,
600 lp_path(talloc_tos(), snum
));
602 status
= NT_STATUS_NO_MEMORY
;
606 if (!set_conn_connectpath(conn
,s
)) {
608 status
= NT_STATUS_NO_MEMORY
;
611 DEBUG(3,("Connect path is '%s' for service [%s]\n",s
,
612 lp_servicename(talloc_tos(), snum
)));
617 * Set up the share security descriptor.
618 * NOTE - we use the *INCOMING USER* session_info
619 * here, as does (indirectly) change_to_user(),
620 * which can be called on any incoming packet.
621 * This way we set up the share access based
622 * on the authenticated user, not the forced
625 * https://bugzilla.samba.org/show_bug.cgi?id=9878
628 status
= check_user_share_access(conn
,
632 if (!NT_STATUS_IS_OK(status
)) {
636 /* Initialise VFS function pointers */
638 if (!smbd_vfs_init(conn
)) {
639 DEBUG(0, ("vfs_init failed for service %s\n",
640 lp_servicename(talloc_tos(), snum
)));
641 status
= NT_STATUS_BAD_NETWORK_NAME
;
645 /* ROOT Activities: */
646 /* explicitly check widelinks here so that we can correctly warn
648 widelinks_warning(snum
);
651 * Enforce the max connections parameter.
654 if ((lp_max_connections(snum
) > 0)
655 && (count_current_connections(lp_servicename(talloc_tos(), SNUM(conn
)), True
) >=
656 lp_max_connections(snum
))) {
658 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
659 lp_max_connections(snum
),
660 lp_servicename(talloc_tos(), snum
)));
661 status
= NT_STATUS_INSUFFICIENT_RESOURCES
;
665 /* Invoke VFS make connection hook - this must be the first
666 filesystem operation that we do. */
668 if (SMB_VFS_CONNECT(conn
, lp_servicename(talloc_tos(), snum
),
669 conn
->session_info
->unix_info
->unix_name
) < 0) {
670 DEBUG(0,("make_connection: VFS make connection failed!\n"));
671 status
= NT_STATUS_UNSUCCESSFUL
;
675 /* Any error exit after here needs to call the disconnect hook. */
676 on_err_call_dis_hook
= true;
678 if ((!conn
->printer
) && (!conn
->ipc
) &&
679 lp_change_notify(conn
->params
)) {
680 if (sconn
->notify_ctx
== NULL
) {
681 sconn
->notify_ctx
= notify_init(
682 sconn
, sconn
->msg_ctx
, sconn
->ev_ctx
);
684 if (sconn
->sys_notify_ctx
== NULL
) {
685 sconn
->sys_notify_ctx
= sys_notify_context_create(
686 sconn
, sconn
->ev_ctx
);
690 if (lp_kernel_oplocks(snum
)) {
691 init_kernel_oplocks(conn
->sconn
);
695 * Fix compatibility issue pointed out by Volker.
696 * We pass the conn->connectpath to the preexec
697 * scripts as a parameter, so attempt to canonicalize
698 * it here before calling the preexec scripts.
699 * We ignore errors here, as it is possible that
700 * the conn->connectpath doesn't exist yet and
701 * the preexec scripts will create them.
704 (void)canonicalize_connect_path(conn
);
706 /* Preexecs are done here as they might make the dir we are to ChDir
708 /* execute any "root preexec = " line */
709 if (*lp_root_preexec(talloc_tos(), snum
)) {
710 char *cmd
= talloc_sub_advanced(talloc_tos(),
711 lp_servicename(talloc_tos(), SNUM(conn
)),
712 conn
->session_info
->unix_info
->unix_name
,
714 conn
->session_info
->unix_token
->gid
,
715 conn
->session_info
->unix_info
->sanitized_username
,
716 conn
->session_info
->info
->domain_name
,
717 lp_root_preexec(talloc_tos(), snum
));
718 DEBUG(5,("cmd=%s\n",cmd
));
719 ret
= smbrun(cmd
,NULL
);
721 if (ret
!= 0 && lp_root_preexec_close(snum
)) {
722 DEBUG(1,("root preexec gave %d - failing "
723 "connection\n", ret
));
724 status
= NT_STATUS_ACCESS_DENIED
;
729 /* USER Activites: */
730 if (!change_to_user(conn
, conn
->vuid
)) {
731 /* No point continuing if they fail the basic checks */
732 DEBUG(0,("Can't become connected user!\n"));
733 status
= NT_STATUS_LOGON_FAILURE
;
740 /* Remember that a different vuid can connect later without these
743 /* Preexecs are done here as they might make the dir we are to ChDir
746 /* execute any "preexec = " line */
747 if (*lp_preexec(talloc_tos(), snum
)) {
748 char *cmd
= talloc_sub_advanced(talloc_tos(),
749 lp_servicename(talloc_tos(), SNUM(conn
)),
750 conn
->session_info
->unix_info
->unix_name
,
752 conn
->session_info
->unix_token
->gid
,
753 conn
->session_info
->unix_info
->sanitized_username
,
754 conn
->session_info
->info
->domain_name
,
755 lp_preexec(talloc_tos(), snum
));
756 ret
= smbrun(cmd
,NULL
);
758 if (ret
!= 0 && lp_preexec_close(snum
)) {
759 DEBUG(1,("preexec gave %d - failing connection\n",
761 status
= NT_STATUS_ACCESS_DENIED
;
766 #ifdef WITH_FAKE_KASERVER
767 if (lp_afs_share(snum
)) {
773 * we've finished with the user stuff - go back to root
774 * so the SMB_VFS_STAT call will only fail on path errors,
775 * not permission problems.
777 change_to_root_user();
778 /* ROOT Activites: */
781 * If widelinks are disallowed we need to canonicalise the connect
782 * path here to ensure we don't have any symlinks in the
783 * connectpath. We will be checking all paths on this connection are
784 * below this directory. We must do this after the VFS init as we
785 * depend on the realpath() pointer in the vfs table. JRA.
787 if (!lp_widelinks(snum
)) {
788 if (!canonicalize_connect_path(conn
)) {
789 DEBUG(0, ("canonicalize_connect_path failed "
790 "for service %s, path %s\n",
791 lp_servicename(talloc_tos(), snum
),
793 status
= NT_STATUS_BAD_NETWORK_NAME
;
798 /* Add veto/hide lists */
799 if (!IS_IPC(conn
) && !IS_PRINT(conn
)) {
800 set_namearray( &conn
->veto_list
,
801 lp_veto_files(talloc_tos(), snum
));
802 set_namearray( &conn
->hide_list
,
803 lp_hide_files(talloc_tos(), snum
));
804 set_namearray( &conn
->veto_oplock_list
,
805 lp_veto_oplock_files(talloc_tos(), snum
));
806 set_namearray( &conn
->aio_write_behind_list
,
807 lp_aio_write_behind(talloc_tos(), snum
));
809 smb_fname_cpath
= synthetic_smb_fname(talloc_tos(), conn
->connectpath
,
811 if (smb_fname_cpath
== NULL
) {
812 status
= NT_STATUS_NO_MEMORY
;
816 /* win2000 does not check the permissions on the directory
817 during the tree connect, instead relying on permission
818 check during individual operations. To match this behaviour
819 I have disabled this chdir check (tridge) */
820 /* the alternative is just to check the directory exists */
822 if ((ret
= SMB_VFS_STAT(conn
, smb_fname_cpath
)) != 0 ||
823 !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
824 if (ret
== 0 && !S_ISDIR(smb_fname_cpath
->st
.st_ex_mode
)) {
825 DEBUG(0,("'%s' is not a directory, when connecting to "
826 "[%s]\n", conn
->connectpath
,
827 lp_servicename(talloc_tos(), snum
)));
829 DEBUG(0,("'%s' does not exist or permission denied "
830 "when connecting to [%s] Error was %s\n",
832 lp_servicename(talloc_tos(), snum
),
835 status
= NT_STATUS_BAD_NETWORK_NAME
;
838 conn
->base_share_dev
= smb_fname_cpath
->st
.st_ex_dev
;
840 talloc_free(conn
->origpath
);
841 conn
->origpath
= talloc_strdup(conn
, conn
->connectpath
);
843 /* Figure out the characteristics of the underlying filesystem. This
844 * assumes that all the filesystem mounted withing a share path have
845 * the same characteristics, which is likely but not guaranteed.
848 conn
->fs_capabilities
= SMB_VFS_FS_CAPABILITIES(conn
, &conn
->ts_res
);
851 * Print out the 'connected as' stuff here as we need
852 * to know the effective uid and gid we will be using
853 * (at least initially).
856 if( DEBUGLVL( IS_IPC(conn
) ? 3 : 2 ) ) {
857 dbgtext( "%s (%s) ", get_remote_machine_name(),
858 tsocket_address_string(conn
->sconn
->remote_address
,
860 dbgtext( "%s", srv_is_signing_active(sconn
) ? "signed " : "");
861 dbgtext( "connect to service %s ",
862 lp_servicename(talloc_tos(), snum
) );
863 dbgtext( "initially as user %s ",
864 conn
->session_info
->unix_info
->unix_name
);
865 dbgtext( "(uid=%d, gid=%d) ", (int)effuid
, (int)effgid
);
866 dbgtext( "(pid %d)\n", (int)getpid() );
873 TALLOC_FREE(smb_fname_cpath
);
874 /* We must exit this function as root. */
875 if (geteuid() != 0) {
876 change_to_root_user();
878 if (on_err_call_dis_hook
) {
879 /* Call VFS disconnect hook */
880 SMB_VFS_DISCONNECT(conn
);
885 /****************************************************************************
886 Make a connection to a service from SMB1. Internal interface.
887 ****************************************************************************/
889 static connection_struct
*make_connection_smb1(struct smbd_server_connection
*sconn
,
891 int snum
, struct user_struct
*vuser
,
895 struct smbXsrv_tcon
*tcon
;
897 struct connection_struct
*conn
;
899 status
= smb1srv_tcon_create(sconn
->conn
, now
, &tcon
);
900 if (!NT_STATUS_IS_OK(status
)) {
901 DEBUG(0,("make_connection_smb1: Couldn't find free tcon %s.\n",
907 conn
= conn_new(sconn
);
911 DEBUG(0,("make_connection_smb1: Couldn't find free connection.\n"));
912 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
916 conn
->cnum
= tcon
->global
->tcon_wire_id
;
919 *pstatus
= make_connection_snum(sconn
,
924 if (!NT_STATUS_IS_OK(*pstatus
)) {
930 tcon
->global
->share_name
= lp_servicename(tcon
->global
, SNUM(conn
));
931 if (tcon
->global
->share_name
== NULL
) {
934 *pstatus
= NT_STATUS_NO_MEMORY
;
937 tcon
->global
->session_global_id
=
938 vuser
->session
->global
->session_global_id
;
940 tcon
->compat
= talloc_move(tcon
, &conn
);
941 tcon
->status
= NT_STATUS_OK
;
943 *pstatus
= smbXsrv_tcon_update(tcon
);
944 if (!NT_STATUS_IS_OK(*pstatus
)) {
952 /****************************************************************************
953 Make a connection to a service from SMB2. External SMB2 interface.
954 We must set cnum before claiming connection.
955 ****************************************************************************/
957 connection_struct
*make_connection_smb2(struct smbd_server_connection
*sconn
,
958 struct smbXsrv_tcon
*tcon
,
960 struct user_struct
*vuser
,
964 connection_struct
*conn
= conn_new(sconn
);
966 DEBUG(0,("make_connection_smb2: Couldn't find free connection.\n"));
967 *pstatus
= NT_STATUS_INSUFFICIENT_RESOURCES
;
971 conn
->cnum
= tcon
->global
->tcon_wire_id
;
974 *pstatus
= make_connection_snum(sconn
,
979 if (!NT_STATUS_IS_OK(*pstatus
)) {
986 /****************************************************************************
987 Make a connection to a service. External SMB1 interface.
990 ****************************************************************************/
992 connection_struct
*make_connection(struct smbd_server_connection
*sconn
,
994 const char *service_in
,
995 const char *pdev
, uint64_t vuid
,
999 struct user_struct
*vuser
= NULL
;
1000 char *service
= NULL
;
1006 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1008 if (!non_root_mode() && (euid
= geteuid()) != 0) {
1009 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1010 "(%u)\n", (unsigned int)euid
));
1011 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1014 if (conn_num_open(sconn
) > 2047) {
1015 *status
= NT_STATUS_INSUFF_SERVER_RESOURCES
;
1019 vuser
= get_valid_user_struct(sconn
, vuid
);
1021 DEBUG(1,("make_connection: refusing to connect with "
1022 "no session setup\n"));
1023 *status
= NT_STATUS_ACCESS_DENIED
;
1027 /* Logic to try and connect to the correct [homes] share, preferably
1028 without too many getpwnam() lookups. This is particulary nasty for
1029 winbind usernames, where the share name isn't the same as unix
1032 The snum of the homes share is stored on the vuser at session setup
1036 if (strequal(service_in
,HOMES_NAME
)) {
1037 if (vuser
->homes_snum
== -1) {
1038 DEBUG(2, ("[homes] share not available for "
1039 "this user because it was not found "
1040 "or created at session setup "
1042 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1045 DEBUG(5, ("making a connection to [homes] service "
1046 "created at session setup time\n"));
1047 return make_connection_smb1(sconn
, now
,
1051 } else if ((vuser
->homes_snum
!= -1)
1052 && strequal(service_in
,
1053 lp_servicename(talloc_tos(), vuser
->homes_snum
))) {
1054 DEBUG(5, ("making a connection to 'homes' service [%s] "
1055 "created at session setup time\n", service_in
));
1056 return make_connection_smb1(sconn
, now
,
1062 service
= talloc_strdup(talloc_tos(), service_in
);
1064 *status
= NT_STATUS_NO_MEMORY
;
1068 if (!strlower_m(service
)) {
1069 DEBUG(2, ("strlower_m %s failed\n", service
));
1070 *status
= NT_STATUS_INVALID_PARAMETER
;
1074 snum
= find_service(talloc_tos(), service
, &service
);
1076 *status
= NT_STATUS_NO_MEMORY
;
1081 if (strequal(service
,"IPC$") ||
1082 (lp_enable_asu_support() && strequal(service
,"ADMIN$"))) {
1083 DEBUG(3,("refusing IPC connection to %s\n", service
));
1084 *status
= NT_STATUS_ACCESS_DENIED
;
1088 DEBUG(3,("%s (%s) couldn't find service %s\n",
1089 get_remote_machine_name(),
1090 tsocket_address_string(
1091 sconn
->remote_address
, talloc_tos()),
1093 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1097 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1098 if (lp_host_msdfs() && (*lp_msdfs_proxy(talloc_tos(), snum
) != '\0')) {
1099 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1100 "(pointing to %s)\n",
1101 service
, lp_msdfs_proxy(talloc_tos(), snum
)));
1102 *status
= NT_STATUS_BAD_NETWORK_NAME
;
1106 DEBUG(5, ("making a connection to 'normal' service %s\n", service
));
1108 return make_connection_smb1(sconn
, now
, snum
, vuser
,
1112 /****************************************************************************
1114 ****************************************************************************/
1116 void close_cnum(connection_struct
*conn
, uint64_t vuid
)
1118 file_close_conn(conn
);
1120 if (!IS_IPC(conn
)) {
1121 dptr_closecnum(conn
);
1124 change_to_root_user();
1126 DEBUG(IS_IPC(conn
)?3:1, ("%s (%s) closed connection to service %s\n",
1127 get_remote_machine_name(),
1128 tsocket_address_string(conn
->sconn
->remote_address
,
1130 lp_servicename(talloc_tos(), SNUM(conn
))));
1132 /* Call VFS disconnect hook */
1133 SMB_VFS_DISCONNECT(conn
);
1135 /* make sure we leave the directory available for unmount */
1136 vfs_ChDir(conn
, "/");
1138 /* execute any "postexec = " line */
1139 if (*lp_postexec(talloc_tos(), SNUM(conn
)) &&
1140 change_to_user(conn
, vuid
)) {
1141 char *cmd
= talloc_sub_advanced(talloc_tos(),
1142 lp_servicename(talloc_tos(), SNUM(conn
)),
1143 conn
->session_info
->unix_info
->unix_name
,
1145 conn
->session_info
->unix_token
->gid
,
1146 conn
->session_info
->unix_info
->sanitized_username
,
1147 conn
->session_info
->info
->domain_name
,
1148 lp_postexec(talloc_tos(), SNUM(conn
)));
1151 change_to_root_user();
1154 change_to_root_user();
1155 /* execute any "root postexec = " line */
1156 if (*lp_root_postexec(talloc_tos(), SNUM(conn
))) {
1157 char *cmd
= talloc_sub_advanced(talloc_tos(),
1158 lp_servicename(talloc_tos(), SNUM(conn
)),
1159 conn
->session_info
->unix_info
->unix_name
,
1161 conn
->session_info
->unix_token
->gid
,
1162 conn
->session_info
->unix_info
->sanitized_username
,
1163 conn
->session_info
->info
->domain_name
,
1164 lp_root_postexec(talloc_tos(), SNUM(conn
)));