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 destname = SMB_STRDUP(connectpath);
65 *d++ = '/'; /* Always start with root. */
69 /* Eat multiple '/' */
73 if ((d > destname + 1) && (*s != '\0')) {
76 start_of_name_component = True;
80 if (start_of_name_component) {
81 if ((s[0] == '.') && (s[1] == '.') && (s[2] == '/' || s[2] == '\0')) {
82 /* Uh oh - "/../" or "/..\0" ! */
84 /* Go past the ../ or .. */
88 s += 2; /* Go past the .. */
91 /* If we just added a '/' - delete it */
92 if ((d > destname) && (*(d-1) == '/')) {
97 /* Are we at the start ? Can't go back further if so. */
99 *d++ = '/'; /* Can't delete root */
102 /* Go back one level... */
103 /* Decrement d first as d points to the *next* char to write into. */
104 for (d--; d > destname; d--) {
109 /* We're still at the start of a name component, just the previous one. */
111 } else if ((s[0] == '.') && ((s[1] == '\0') || s[1] == '/')) {
112 /* Component of pathname can't be "." only - skip the '.' . */
126 /* Get the size of the next MB character. */
127 next_codepoint(s,&siz);
148 start_of_name_component = false;
152 /* And must not end in '/' */
153 if (d > destname + 1 && (*(d-1) == '/')) {
157 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
158 lp_servicename(SNUM(conn)), destname ));
160 string_set(&conn->connectpath, destname);
165 /****************************************************************************
166 Load parameters specific to a connection/service.
167 ****************************************************************************/
169 bool set_current_service(connection_struct *conn, uint16 flags, bool do_chdir)
178 conn->lastused_count++;
183 vfs_ChDir(conn,conn->connectpath) != 0 &&
184 vfs_ChDir(conn,conn->origpath) != 0) {
185 DEBUG(0,("chdir (%s) failed\n",
190 if ((conn == last_conn) && (last_flags == flags)) {
197 /* Obey the client case sensitivity requests - only for clients that support it. */
198 switch (lp_casesensitive(snum)) {
201 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
202 enum remote_arch_types ra_type = get_remote_arch();
203 if ((ra_type != RA_SAMBA) && (ra_type != RA_CIFSFS)) {
204 /* Client can't support per-packet case sensitive pathnames. */
205 conn->case_sensitive = False;
207 conn->case_sensitive = !(flags & FLAG_CASELESS_PATHNAMES);
212 conn->case_sensitive = True;
215 conn->case_sensitive = False;
221 static int load_registry_service(const char *servicename)
223 if (!lp_registry_shares()) {
227 if ((servicename == NULL) || (*servicename == '\0')) {
231 if (strequal(servicename, GLOBAL_NAME)) {
235 if (!process_registry_service(servicename)) {
239 return lp_servicenumber(servicename);
242 void load_registry_shares(void)
244 DEBUG(8, ("load_registry_shares()\n"));
245 if (!lp_registry_shares()) {
249 process_registry_shares();
254 /****************************************************************************
255 Add a home service. Returns the new service number or -1 if fail.
256 ****************************************************************************/
258 int add_home_service(const char *service, const char *username, const char *homedir)
262 if (!service || !homedir)
265 if ((iHomeService = lp_servicenumber(HOMES_NAME)) < 0) {
266 if ((iHomeService = load_registry_service(HOMES_NAME)) < 0) {
272 * If this is a winbindd provided username, remove
273 * the domain component before adding the service.
274 * Log a warning if the "path=" parameter does not
275 * include any macros.
279 const char *p = strchr(service,*lp_winbind_separator());
281 /* We only want the 'user' part of the string */
287 if (!lp_add_home(service, iHomeService, username, homedir)) {
291 return lp_servicenumber(service);
296 * Find a service entry.
298 * @param service is modified (to canonical form??)
301 int find_service(fstring service)
304 struct smbd_server_connection *sconn = smbd_server_conn;
306 all_string_sub(service,"\\","/",0);
308 iService = lp_servicenumber(service);
310 /* now handle the special case of a home directory */
312 char *phome_dir = get_user_home_dir(talloc_tos(), service);
316 * Try mapping the servicename, it may
317 * be a Windows to unix mapped user name.
319 if(map_username(sconn, service))
320 phome_dir = get_user_home_dir(
321 talloc_tos(), service);
324 DEBUG(3,("checking for home directory %s gave %s\n",service,
325 phome_dir?phome_dir:"(NULL)"));
327 iService = add_home_service(service,service /* 'username' */, phome_dir);
330 /* If we still don't have a service, attempt to add it as a printer. */
334 if ((iPrinterService = lp_servicenumber(PRINTERS_NAME)) < 0) {
335 iPrinterService = load_registry_service(PRINTERS_NAME);
337 if (iPrinterService) {
338 DEBUG(3,("checking whether %s is a valid printer name...\n", service));
339 if (pcap_printername_ok(service)) {
340 DEBUG(3,("%s is a valid printer name\n", service));
341 DEBUG(3,("adding %s as a printer service\n", service));
342 lp_add_printer(service, iPrinterService);
343 iService = lp_servicenumber(service);
345 DEBUG(0,("failed to add %s as a printer service!\n", service));
348 DEBUG(3,("%s is not a valid printer name\n", service));
353 /* Check for default vfs service? Unsure whether to implement this */
358 iService = load_registry_service(service);
361 /* Is it a usershare service ? */
362 if (iService < 0 && *lp_usershare_path()) {
363 /* Ensure the name is canonicalized. */
365 iService = load_usershare_service(service);
368 /* just possibly it's a default service? */
370 char *pdefservice = lp_defaultservice();
371 if (pdefservice && *pdefservice && !strequal(pdefservice,service) && !strstr_m(service,"..")) {
373 * We need to do a local copy here as lp_defaultservice()
374 * returns one of the rotating lp_string buffers that
375 * could get overwritten by the recursive find_service() call
376 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
378 char *defservice = SMB_STRDUP(pdefservice);
384 /* Disallow anything except explicit share names. */
385 if (strequal(defservice,HOMES_NAME) ||
386 strequal(defservice, PRINTERS_NAME) ||
387 strequal(defservice, "IPC$")) {
388 SAFE_FREE(defservice);
392 iService = find_service(defservice);
394 all_string_sub(service, "_","/",0);
395 iService = lp_add_service(service, iService);
397 SAFE_FREE(defservice);
402 if (!VALID_SNUM(iService)) {
403 DEBUG(0,("Invalid snum %d for %s\n",iService, service));
411 DEBUG(3,("find_service() failed to find service %s\n", service));
417 /****************************************************************************
418 do some basic sainity checks on the share.
419 This function modifies dev, ecode.
420 ****************************************************************************/
422 static NTSTATUS share_sanity_checks(int snum, fstring dev)
425 if (!lp_snum_ok(snum) ||
426 !check_access(smbd_server_fd(),
427 lp_hostsallow(snum), lp_hostsdeny(snum))) {
428 return NT_STATUS_ACCESS_DENIED;
431 if (dev[0] == '?' || !dev[0]) {
432 if (lp_print_ok(snum)) {
433 fstrcpy(dev,"LPT1:");
434 } else if (strequal(lp_fstype(snum), "IPC")) {
443 if (lp_print_ok(snum)) {
444 if (!strequal(dev, "LPT1:")) {
445 return NT_STATUS_BAD_DEVICE_TYPE;
447 } else if (strequal(lp_fstype(snum), "IPC")) {
448 if (!strequal(dev, "IPC")) {
449 return NT_STATUS_BAD_DEVICE_TYPE;
451 } else if (!strequal(dev, "A:")) {
452 return NT_STATUS_BAD_DEVICE_TYPE;
455 /* Behave as a printer if we are supposed to */
456 if (lp_print_ok(snum) && (strcmp(dev, "A:") == 0)) {
457 fstrcpy(dev, "LPT1:");
464 * Go through lookup_name etc to find the force'd group.
466 * Create a new token from src_token, replacing the primary group sid with the
470 static NTSTATUS find_forced_group(bool force_user,
471 int snum, const char *username,
475 NTSTATUS result = NT_STATUS_NO_SUCH_GROUP;
476 TALLOC_CTX *frame = talloc_stackframe();
478 enum lsa_SidType type;
480 bool user_must_be_member = False;
483 groupname = talloc_strdup(talloc_tos(), lp_force_group(snum));
484 if (groupname == NULL) {
485 DEBUG(1, ("talloc_strdup failed\n"));
486 result = NT_STATUS_NO_MEMORY;
490 if (groupname[0] == '+') {
491 user_must_be_member = True;
495 groupname = talloc_string_sub(talloc_tos(), groupname,
496 "%S", lp_servicename(snum));
497 if (groupname == NULL) {
498 DEBUG(1, ("talloc_string_sub failed\n"));
499 result = NT_STATUS_NO_MEMORY;
503 if (!lookup_name_smbconf(talloc_tos(), groupname,
504 LOOKUP_NAME_ALL|LOOKUP_NAME_GROUP,
505 NULL, NULL, &group_sid, &type)) {
506 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
511 if ((type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) &&
512 (type != SID_NAME_WKN_GRP)) {
513 DEBUG(10, ("%s is a %s, not a group\n", groupname,
514 sid_type_lookup(type)));
518 if (!sid_to_gid(&group_sid, &gid)) {
519 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
520 sid_string_dbg(&group_sid), groupname));
525 * If the user has been forced and the forced group starts with a '+',
526 * then we only set the group to be the forced group if the forced
527 * user is a member of that group. Otherwise, the meaning of the '+'
531 if (force_user && user_must_be_member) {
532 if (user_in_group_sid(username, &group_sid)) {
533 sid_copy(pgroup_sid, &group_sid);
535 DEBUG(3,("Forced group %s for member %s\n",
536 groupname, username));
538 DEBUG(0,("find_forced_group: forced user %s is not a member "
539 "of forced group %s. Disallowing access.\n",
540 username, groupname ));
541 result = NT_STATUS_MEMBER_NOT_IN_GROUP;
545 sid_copy(pgroup_sid, &group_sid);
547 DEBUG(3,("Forced group %s\n", groupname));
550 result = NT_STATUS_OK;
556 /****************************************************************************
557 Create an auth_serversupplied_info structure for a connection_struct
558 ****************************************************************************/
560 static NTSTATUS create_connection_server_info(struct smbd_server_connection *sconn,
561 TALLOC_CTX *mem_ctx, int snum,
562 struct auth_serversupplied_info *vuid_serverinfo,
564 struct auth_serversupplied_info **presult)
566 if (lp_guest_only(snum)) {
567 return make_server_info_guest(mem_ctx, presult);
570 if (vuid_serverinfo != NULL) {
572 struct auth_serversupplied_info *result;
575 * This is the normal security != share case where we have a
576 * valid vuid from the session setup. */
578 if (vuid_serverinfo->guest) {
579 if (!lp_guest_ok(snum)) {
580 DEBUG(2, ("guest user (from session setup) "
581 "not permitted to access this share "
582 "(%s)\n", lp_servicename(snum)));
583 return NT_STATUS_ACCESS_DENIED;
586 if (!user_ok_token(vuid_serverinfo->unix_name,
587 pdb_get_domain(vuid_serverinfo->sam_account),
588 vuid_serverinfo->ptok, snum)) {
589 DEBUG(2, ("user '%s' (from session setup) not "
590 "permitted to access this share "
592 vuid_serverinfo->unix_name,
593 lp_servicename(snum)));
594 return NT_STATUS_ACCESS_DENIED;
598 result = copy_serverinfo(mem_ctx, vuid_serverinfo);
599 if (result == NULL) {
600 return NT_STATUS_NO_MEMORY;
607 if (lp_security() == SEC_SHARE) {
612 /* add the sharename as a possible user name if we
613 are in share mode security */
615 add_session_user(sconn, lp_servicename(snum));
617 /* shall we let them in? */
619 if (!authorise_login(sconn, snum,user,password,&guest)) {
620 DEBUG( 2, ( "Invalid username/password for [%s]\n",
621 lp_servicename(snum)) );
622 return NT_STATUS_WRONG_PASSWORD;
625 return make_serverinfo_from_username(mem_ctx, user, guest,
629 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
630 return NT_STATUS_ACCESS_DENIED;
634 /****************************************************************************
635 Make a connection, given the snum to connect to, and the vuser of the
636 connecting user if appropriate.
637 ****************************************************************************/
639 connection_struct *make_connection_snum(struct smbd_server_connection *sconn,
640 int snum, user_struct *vuser,
645 connection_struct *conn;
646 struct smb_filename *smb_fname_cpath = NULL;
649 char addr[INET6_ADDRSTRLEN];
650 bool on_err_call_dis_hook = false;
655 if (NT_STATUS_IS_ERR(*pstatus = share_sanity_checks(snum, dev))) {
659 conn = conn_new(sconn);
661 DEBUG(0,("Couldn't find free connection.\n"));
662 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
666 conn->params->service = snum;
668 status = create_connection_server_info(sconn,
669 conn, snum, vuser ? vuser->server_info : NULL, password,
672 if (!NT_STATUS_IS_OK(status)) {
673 DEBUG(1, ("create_connection_server_info failed: %s\n",
676 conn_free(sconn, conn);
680 if ((lp_guest_only(snum)) || (lp_security() == SEC_SHARE)) {
681 conn->force_user = true;
684 add_session_user(sconn, conn->server_info->unix_name);
686 safe_strcpy(conn->client_address,
687 client_addr(get_client_fd(),addr,sizeof(addr)),
688 sizeof(conn->client_address)-1);
689 conn->num_files_open = 0;
690 conn->lastused = conn->lastused_count = time(NULL);
692 conn->printer = (strncmp(dev,"LPT",3) == 0);
693 conn->ipc = ( (strncmp(dev,"IPC",3) == 0) ||
694 ( lp_enable_asu_support() && strequal(dev,"ADMIN$")) );
697 /* Case options for the share. */
698 if (lp_casesensitive(snum) == Auto) {
699 /* We will be setting this per packet. Set to be case
700 * insensitive for now. */
701 conn->case_sensitive = False;
703 conn->case_sensitive = (bool)lp_casesensitive(snum);
706 conn->case_preserve = lp_preservecase(snum);
707 conn->short_case_preserve = lp_shortpreservecase(snum);
709 conn->encrypt_level = lp_smb_encrypt(snum);
711 conn->veto_list = NULL;
712 conn->hide_list = NULL;
713 conn->veto_oplock_list = NULL;
714 conn->aio_write_behind_list = NULL;
715 string_set(&conn->dirpath,"");
717 conn->read_only = lp_readonly(SNUM(conn));
718 conn->admin_user = False;
720 if (*lp_force_user(snum)) {
723 * Replace conn->server_info with a completely faked up one
724 * from the username we are forced into :-)
728 struct auth_serversupplied_info *forced_serverinfo;
730 fuser = talloc_string_sub(conn, lp_force_user(snum), "%S",
731 lp_servicename(snum));
733 conn_free(sconn, conn);
734 *pstatus = NT_STATUS_NO_MEMORY;
738 status = make_serverinfo_from_username(
739 conn, fuser, conn->server_info->guest,
741 if (!NT_STATUS_IS_OK(status)) {
742 conn_free(sconn, conn);
747 TALLOC_FREE(conn->server_info);
748 conn->server_info = forced_serverinfo;
750 conn->force_user = True;
751 DEBUG(3,("Forced user %s\n", fuser));
755 * If force group is true, then override
756 * any groupid stored for the connecting user.
759 if (*lp_force_group(snum)) {
761 status = find_forced_group(
762 conn->force_user, snum, conn->server_info->unix_name,
763 &conn->server_info->ptok->user_sids[1],
764 &conn->server_info->utok.gid);
766 if (!NT_STATUS_IS_OK(status)) {
767 conn_free(sconn, conn);
773 * We need to cache this gid, to use within
774 * change_to_user() separately from the conn->server_info
775 * struct. We only use conn->server_info directly if
776 * "force_user" was set.
778 conn->force_group_gid = conn->server_info->utok.gid;
781 conn->vuid = (vuser != NULL) ? vuser->vuid : UID_FIELD_INVALID;
784 char *s = talloc_sub_advanced(talloc_tos(),
785 lp_servicename(SNUM(conn)),
786 conn->server_info->unix_name,
788 conn->server_info->utok.gid,
789 conn->server_info->sanitized_username,
790 pdb_get_domain(conn->server_info->sam_account),
793 conn_free(sconn, conn);
794 *pstatus = NT_STATUS_NO_MEMORY;
798 if (!set_conn_connectpath(conn,s)) {
800 conn_free(sconn, conn);
801 *pstatus = NT_STATUS_NO_MEMORY;
804 DEBUG(3,("Connect path is '%s' for service [%s]\n",s,
805 lp_servicename(snum)));
810 * New code to check if there's a share security descripter
811 * added from NT server manager. This is done after the
812 * smb.conf checks are done as we need a uid and token. JRA.
817 bool can_write = False;
819 can_write = share_access_check(conn->server_info->ptok,
820 lp_servicename(snum),
824 if (!share_access_check(conn->server_info->ptok,
825 lp_servicename(snum),
827 /* No access, read or write. */
828 DEBUG(0,("make_connection: connection to %s "
829 "denied due to security "
831 lp_servicename(snum)));
832 conn_free(sconn, conn);
833 *pstatus = NT_STATUS_ACCESS_DENIED;
836 conn->read_only = True;
840 /* Initialise VFS function pointers */
842 if (!smbd_vfs_init(conn)) {
843 DEBUG(0, ("vfs_init failed for service %s\n",
844 lp_servicename(snum)));
845 conn_free(sconn, conn);
846 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
851 * If widelinks are disallowed we need to canonicalise the connect
852 * path here to ensure we don't have any symlinks in the
853 * connectpath. We will be checking all paths on this connection are
854 * below this directory. We must do this after the VFS init as we
855 * depend on the realpath() pointer in the vfs table. JRA.
857 if (!lp_widelinks(snum)) {
858 if (!canonicalize_connect_path(conn)) {
859 DEBUG(0, ("canonicalize_connect_path failed "
860 "for service %s, path %s\n",
861 lp_servicename(snum),
863 conn_free(sconn, conn);
864 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
869 if ((!conn->printer) && (!conn->ipc)) {
870 conn->notify_ctx = notify_init(conn, server_id_self(),
871 smbd_messaging_context(),
872 smbd_event_context(),
876 /* ROOT Activities: */
878 * Enforce the max connections parameter.
881 if ((lp_max_connections(snum) > 0)
882 && (count_current_connections(lp_servicename(SNUM(conn)), True) >=
883 lp_max_connections(snum))) {
885 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
886 lp_max_connections(snum), lp_servicename(snum)));
887 conn_free(sconn, conn);
888 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
893 * Get us an entry in the connections db
895 if (!claim_connection(conn, lp_servicename(snum), 0)) {
896 DEBUG(1, ("Could not store connections entry\n"));
897 conn_free(sconn, conn);
898 *pstatus = NT_STATUS_INTERNAL_DB_ERROR;
902 /* Preexecs are done here as they might make the dir we are to ChDir
904 /* execute any "root preexec = " line */
905 if (*lp_rootpreexec(snum)) {
906 char *cmd = talloc_sub_advanced(talloc_tos(),
907 lp_servicename(SNUM(conn)),
908 conn->server_info->unix_name,
910 conn->server_info->utok.gid,
911 conn->server_info->sanitized_username,
912 pdb_get_domain(conn->server_info->sam_account),
913 lp_rootpreexec(snum));
914 DEBUG(5,("cmd=%s\n",cmd));
915 ret = smbrun(cmd,NULL);
917 if (ret != 0 && lp_rootpreexec_close(snum)) {
918 DEBUG(1,("root preexec gave %d - failing "
919 "connection\n", ret));
920 yield_connection(conn, lp_servicename(snum));
921 conn_free(sconn, conn);
922 *pstatus = NT_STATUS_ACCESS_DENIED;
927 /* USER Activites: */
928 if (!change_to_user(conn, conn->vuid)) {
929 /* No point continuing if they fail the basic checks */
930 DEBUG(0,("Can't become connected user!\n"));
931 yield_connection(conn, lp_servicename(snum));
932 conn_free(sconn, conn);
933 *pstatus = NT_STATUS_LOGON_FAILURE;
937 /* Remember that a different vuid can connect later without these
940 /* Preexecs are done here as they might make the dir we are to ChDir
943 /* execute any "preexec = " line */
944 if (*lp_preexec(snum)) {
945 char *cmd = talloc_sub_advanced(talloc_tos(),
946 lp_servicename(SNUM(conn)),
947 conn->server_info->unix_name,
949 conn->server_info->utok.gid,
950 conn->server_info->sanitized_username,
951 pdb_get_domain(conn->server_info->sam_account),
953 ret = smbrun(cmd,NULL);
955 if (ret != 0 && lp_preexec_close(snum)) {
956 DEBUG(1,("preexec gave %d - failing connection\n",
958 *pstatus = NT_STATUS_ACCESS_DENIED;
963 #ifdef WITH_FAKE_KASERVER
964 if (lp_afs_share(snum)) {
969 /* Add veto/hide lists */
970 if (!IS_IPC(conn) && !IS_PRINT(conn)) {
971 set_namearray( &conn->veto_list, lp_veto_files(snum));
972 set_namearray( &conn->hide_list, lp_hide_files(snum));
973 set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(snum));
974 set_namearray( &conn->aio_write_behind_list,
975 lp_aio_write_behind(snum));
978 /* Invoke VFS make connection hook - do this before the VFS_STAT call
979 to allow any filesystems needing user credentials to initialize
982 if (SMB_VFS_CONNECT(conn, lp_servicename(snum),
983 conn->server_info->unix_name) < 0) {
984 DEBUG(0,("make_connection: VFS make connection failed!\n"));
985 *pstatus = NT_STATUS_UNSUCCESSFUL;
989 /* Any error exit after here needs to call the disconnect hook. */
990 on_err_call_dis_hook = true;
992 status = create_synthetic_smb_fname(talloc_tos(), conn->connectpath,
993 NULL, NULL, &smb_fname_cpath);
994 if (!NT_STATUS_IS_OK(status)) {
999 /* win2000 does not check the permissions on the directory
1000 during the tree connect, instead relying on permission
1001 check during individual operations. To match this behaviour
1002 I have disabled this chdir check (tridge) */
1003 /* the alternative is just to check the directory exists */
1004 if ((ret = SMB_VFS_STAT(conn, smb_fname_cpath)) != 0 ||
1005 !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1006 if (ret == 0 && !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1007 DEBUG(0,("'%s' is not a directory, when connecting to "
1008 "[%s]\n", conn->connectpath,
1009 lp_servicename(snum)));
1011 DEBUG(0,("'%s' does not exist or permission denied "
1012 "when connecting to [%s] Error was %s\n",
1013 conn->connectpath, lp_servicename(snum),
1016 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1020 string_set(&conn->origpath,conn->connectpath);
1022 #if SOFTLINK_OPTIMISATION
1023 /* resolve any soft links early if possible */
1024 if (vfs_ChDir(conn,conn->connectpath) == 0) {
1025 TALLOC_CTX *ctx = talloc_tos();
1026 char *s = vfs_GetWd(ctx,s);
1028 *status = map_nt_error_from_unix(errno);
1031 if (!set_conn_connectpath(conn,s)) {
1032 *status = NT_STATUS_NO_MEMORY;
1035 vfs_ChDir(conn,conn->connectpath);
1039 /* Figure out the characteristics of the underlying filesystem. This
1040 * assumes that all the filesystem mounted withing a share path have
1041 * the same characteristics, which is likely but not guaranteed.
1044 conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn);
1047 * Print out the 'connected as' stuff here as we need
1048 * to know the effective uid and gid we will be using
1049 * (at least initially).
1052 if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
1053 dbgtext( "%s (%s) ", get_remote_machine_name(),
1054 conn->client_address );
1055 dbgtext( "%s", srv_is_signing_active(smbd_server_conn) ? "signed " : "");
1056 dbgtext( "connect to service %s ", lp_servicename(snum) );
1057 dbgtext( "initially as user %s ",
1058 conn->server_info->unix_name );
1059 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1060 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1063 /* we've finished with the user stuff - go back to root */
1064 change_to_root_user();
1068 TALLOC_FREE(smb_fname_cpath);
1069 change_to_root_user();
1070 if (on_err_call_dis_hook) {
1071 /* Call VFS disconnect hook */
1072 SMB_VFS_DISCONNECT(conn);
1074 yield_connection(conn, lp_servicename(snum));
1075 conn_free(sconn, conn);
1079 /****************************************************************************
1080 Make a connection to a service.
1083 ****************************************************************************/
1085 connection_struct *make_connection(struct smbd_server_connection *sconn,
1086 const char *service_in, DATA_BLOB password,
1087 const char *pdev, uint16 vuid,
1091 user_struct *vuser = NULL;
1095 char addr[INET6_ADDRSTRLEN];
1099 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1101 if (!non_root_mode() && (euid = geteuid()) != 0) {
1102 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1103 "(%u)\n", (unsigned int)euid ));
1104 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1107 if (conn_num_open(sconn) > 2047) {
1108 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1112 if(lp_security() != SEC_SHARE) {
1113 vuser = get_valid_user_struct(sconn, vuid);
1115 DEBUG(1,("make_connection: refusing to connect with "
1116 "no session setup\n"));
1117 *status = NT_STATUS_ACCESS_DENIED;
1122 /* Logic to try and connect to the correct [homes] share, preferably
1123 without too many getpwnam() lookups. This is particulary nasty for
1124 winbind usernames, where the share name isn't the same as unix
1127 The snum of the homes share is stored on the vuser at session setup
1131 if (strequal(service_in,HOMES_NAME)) {
1132 if(lp_security() != SEC_SHARE) {
1133 DATA_BLOB no_pw = data_blob_null;
1134 if (vuser->homes_snum == -1) {
1135 DEBUG(2, ("[homes] share not available for "
1136 "this user because it was not found "
1137 "or created at session setup "
1139 *status = NT_STATUS_BAD_NETWORK_NAME;
1142 DEBUG(5, ("making a connection to [homes] service "
1143 "created at session setup time\n"));
1144 return make_connection_snum(sconn,
1149 /* Security = share. Try with
1150 * current_user_info.smb_name as the username. */
1151 if (*current_user_info.smb_name) {
1152 fstring unix_username;
1153 fstrcpy(unix_username,
1154 current_user_info.smb_name);
1155 map_username(sconn, unix_username);
1156 snum = find_service(unix_username);
1159 DEBUG(5, ("making a connection to 'homes' "
1160 "service %s based on "
1161 "security=share\n", service_in));
1162 return make_connection_snum(sconn,
1168 } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
1169 && strequal(service_in,
1170 lp_servicename(vuser->homes_snum))) {
1171 DATA_BLOB no_pw = data_blob_null;
1172 DEBUG(5, ("making a connection to 'homes' service [%s] "
1173 "created at session setup time\n", service_in));
1174 return make_connection_snum(sconn,
1180 fstrcpy(service, service_in);
1182 strlower_m(service);
1184 snum = find_service(service);
1187 if (strequal(service,"IPC$") ||
1188 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1189 DEBUG(3,("refusing IPC connection to %s\n", service));
1190 *status = NT_STATUS_ACCESS_DENIED;
1194 DEBUG(0,("%s (%s) couldn't find service %s\n",
1195 get_remote_machine_name(),
1196 client_addr(get_client_fd(),addr,sizeof(addr)),
1198 *status = NT_STATUS_BAD_NETWORK_NAME;
1202 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1203 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum) != '\0')) {
1204 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1205 "(pointing to %s)\n",
1206 service, lp_msdfs_proxy(snum)));
1207 *status = NT_STATUS_BAD_NETWORK_NAME;
1211 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1213 return make_connection_snum(sconn, snum, vuser,
1218 /****************************************************************************
1220 ****************************************************************************/
1222 void close_cnum(struct smbd_server_connection *sconn,
1223 connection_struct *conn, uint16 vuid)
1225 file_close_conn(conn);
1227 if (!IS_IPC(conn)) {
1228 dptr_closecnum(conn);
1231 change_to_root_user();
1233 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1234 get_remote_machine_name(),
1235 conn->client_address,
1236 lp_servicename(SNUM(conn))));
1238 /* Call VFS disconnect hook */
1239 SMB_VFS_DISCONNECT(conn);
1241 yield_connection(conn, lp_servicename(SNUM(conn)));
1243 /* make sure we leave the directory available for unmount */
1244 vfs_ChDir(conn, "/");
1246 /* execute any "postexec = " line */
1247 if (*lp_postexec(SNUM(conn)) &&
1248 change_to_user(conn, vuid)) {
1249 char *cmd = talloc_sub_advanced(talloc_tos(),
1250 lp_servicename(SNUM(conn)),
1251 conn->server_info->unix_name,
1253 conn->server_info->utok.gid,
1254 conn->server_info->sanitized_username,
1255 pdb_get_domain(conn->server_info->sam_account),
1256 lp_postexec(SNUM(conn)));
1259 change_to_root_user();
1262 change_to_root_user();
1263 /* execute any "root postexec = " line */
1264 if (*lp_rootpostexec(SNUM(conn))) {
1265 char *cmd = talloc_sub_advanced(talloc_tos(),
1266 lp_servicename(SNUM(conn)),
1267 conn->server_info->unix_name,
1269 conn->server_info->utok.gid,
1270 conn->server_info->sanitized_username,
1271 pdb_get_domain(conn->server_info->sam_account),
1272 lp_rootpostexec(SNUM(conn)));
1277 conn_free(sconn, conn);