2 Unix SMB/CIFS implementation.
3 service (connection) opening and closing
4 Copyright (C) Andrew Tridgell 1992-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "smbd/globals.h"
23 extern userdom_struct current_user_info;
25 static bool canonicalize_connect_path(connection_struct *conn)
27 #ifdef REALPATH_TAKES_NULL
29 char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath,NULL);
33 ret = set_conn_connectpath(conn,resolved_name);
34 SAFE_FREE(resolved_name);
37 char resolved_name_buf[PATH_MAX+1];
38 char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath,resolved_name_buf);
42 return set_conn_connectpath(conn,resolved_name);
43 #endif /* REALPATH_TAKES_NULL */
46 /****************************************************************************
47 Ensure when setting connectpath it is a canonicalized (no ./ // or ../)
48 absolute path stating in / and not ending in /.
49 Observent people will notice a similarity between this and check_path_syntax :-).
50 ****************************************************************************/
52 bool set_conn_connectpath(connection_struct *conn, const char *connectpath)
56 const char *s = connectpath;
57 bool start_of_name_component = true;
59 if (connectpath == NULL || connectpath[0] == '\0') {
63 /* Allocate for strlen + '\0' + possible leading '/' */
64 destname = SMB_MALLOC(strlen(connectpath) + 2);
70 *d++ = '/'; /* Always start with root. */
74 /* Eat multiple '/' */
78 if ((d > destname + 1) && (*s != '\0')) {
81 start_of_name_component = True;
85 if (start_of_name_component) {
86 if ((s[0] == '.') && (s[1] == '.') && (s[2] == '/' || s[2] == '\0')) {
87 /* Uh oh - "/../" or "/..\0" ! */
89 /* Go past the ../ or .. */
93 s += 2; /* Go past the .. */
96 /* If we just added a '/' - delete it */
97 if ((d > destname) && (*(d-1) == '/')) {
102 /* Are we at the start ? Can't go back further if so. */
104 *d++ = '/'; /* Can't delete root */
107 /* Go back one level... */
108 /* Decrement d first as d points to the *next* char to write into. */
109 for (d--; d > destname; d--) {
114 /* We're still at the start of a name component, just the previous one. */
116 } else if ((s[0] == '.') && ((s[1] == '\0') || s[1] == '/')) {
117 /* Component of pathname can't be "." only - skip the '.' . */
131 /* Get the size of the next MB character. */
132 next_codepoint(s,&siz);
153 start_of_name_component = false;
157 /* And must not end in '/' */
158 if (d > destname + 1 && (*(d-1) == '/')) {
162 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
163 lp_servicename(SNUM(conn)), destname ));
165 string_set(&conn->connectpath, destname);
170 /****************************************************************************
171 Load parameters specific to a connection/service.
172 ****************************************************************************/
174 bool set_current_service(connection_struct *conn, uint16 flags, bool do_chdir)
183 conn->lastused_count++;
188 vfs_ChDir(conn,conn->connectpath) != 0 &&
189 vfs_ChDir(conn,conn->origpath) != 0) {
190 DEBUG(((errno!=EACCES)?0:3),("chdir (%s) failed, reason: %s\n",
191 conn->connectpath, strerror(errno)));
195 if ((conn == last_conn) && (last_flags == flags)) {
202 /* Obey the client case sensitivity requests - only for clients that support it. */
203 switch (lp_casesensitive(snum)) {
206 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
207 enum remote_arch_types ra_type = get_remote_arch();
208 if ((ra_type != RA_SAMBA) && (ra_type != RA_CIFSFS)) {
209 /* Client can't support per-packet case sensitive pathnames. */
210 conn->case_sensitive = False;
212 conn->case_sensitive = !(flags & FLAG_CASELESS_PATHNAMES);
217 conn->case_sensitive = True;
220 conn->case_sensitive = False;
226 static int load_registry_service(const char *servicename)
228 if (!lp_registry_shares()) {
232 if ((servicename == NULL) || (*servicename == '\0')) {
236 if (strequal(servicename, GLOBAL_NAME)) {
240 if (!process_registry_service(servicename)) {
244 return lp_servicenumber(servicename);
247 void load_registry_shares(void)
249 DEBUG(8, ("load_registry_shares()\n"));
250 if (!lp_registry_shares()) {
254 process_registry_shares();
259 /****************************************************************************
260 Add a home service. Returns the new service number or -1 if fail.
261 ****************************************************************************/
263 int add_home_service(const char *service, const char *username, const char *homedir)
267 if (!service || !homedir || homedir[0] == '\0')
270 if ((iHomeService = lp_servicenumber(HOMES_NAME)) < 0) {
271 if ((iHomeService = load_registry_service(HOMES_NAME)) < 0) {
277 * If this is a winbindd provided username, remove
278 * the domain component before adding the service.
279 * Log a warning if the "path=" parameter does not
280 * include any macros.
284 const char *p = strchr(service,*lp_winbind_separator());
286 /* We only want the 'user' part of the string */
292 if (!lp_add_home(service, iHomeService, username, homedir)) {
296 return lp_servicenumber(service);
301 * Find a service entry.
303 * @param service is modified (to canonical form??)
306 int find_service(fstring service)
309 struct smbd_server_connection *sconn = smbd_server_conn;
311 all_string_sub(service,"\\","/",0);
313 iService = lp_servicenumber(service);
315 /* now handle the special case of a home directory */
317 char *phome_dir = get_user_home_dir(talloc_tos(), service);
321 * Try mapping the servicename, it may
322 * be a Windows to unix mapped user name.
324 if(map_username(sconn, service))
325 phome_dir = get_user_home_dir(
326 talloc_tos(), service);
329 DEBUG(3,("checking for home directory %s gave %s\n",service,
330 phome_dir?phome_dir:"(NULL)"));
332 iService = add_home_service(service,service /* 'username' */, phome_dir);
335 /* If we still don't have a service, attempt to add it as a printer. */
339 if ((iPrinterService = lp_servicenumber(PRINTERS_NAME)) < 0) {
340 iPrinterService = load_registry_service(PRINTERS_NAME);
342 if (iPrinterService) {
343 DEBUG(3,("checking whether %s is a valid printer name...\n", service));
344 if (pcap_printername_ok(service)) {
345 DEBUG(3,("%s is a valid printer name\n", service));
346 DEBUG(3,("adding %s as a printer service\n", service));
347 lp_add_printer(service, iPrinterService);
348 iService = lp_servicenumber(service);
350 DEBUG(0,("failed to add %s as a printer service!\n", service));
353 DEBUG(3,("%s is not a valid printer name\n", service));
358 /* Check for default vfs service? Unsure whether to implement this */
363 iService = load_registry_service(service);
366 /* Is it a usershare service ? */
367 if (iService < 0 && *lp_usershare_path()) {
368 /* Ensure the name is canonicalized. */
370 iService = load_usershare_service(service);
373 /* just possibly it's a default service? */
375 char *pdefservice = lp_defaultservice();
376 if (pdefservice && *pdefservice && !strequal(pdefservice,service) && !strstr_m(service,"..")) {
378 * We need to do a local copy here as lp_defaultservice()
379 * returns one of the rotating lp_string buffers that
380 * could get overwritten by the recursive find_service() call
381 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
383 char *defservice = SMB_STRDUP(pdefservice);
389 /* Disallow anything except explicit share names. */
390 if (strequal(defservice,HOMES_NAME) ||
391 strequal(defservice, PRINTERS_NAME) ||
392 strequal(defservice, "IPC$")) {
393 SAFE_FREE(defservice);
397 iService = find_service(defservice);
399 all_string_sub(service, "_","/",0);
400 iService = lp_add_service(service, iService);
402 SAFE_FREE(defservice);
407 if (!VALID_SNUM(iService)) {
408 DEBUG(0,("Invalid snum %d for %s\n",iService, service));
416 DEBUG(3,("find_service() failed to find service %s\n", service));
422 /****************************************************************************
423 do some basic sainity checks on the share.
424 This function modifies dev, ecode.
425 ****************************************************************************/
427 static NTSTATUS share_sanity_checks(int snum, fstring dev)
430 if (!lp_snum_ok(snum) ||
431 !check_access(smbd_server_fd(),
432 lp_hostsallow(snum), lp_hostsdeny(snum))) {
433 return NT_STATUS_ACCESS_DENIED;
436 if (dev[0] == '?' || !dev[0]) {
437 if (lp_print_ok(snum)) {
438 fstrcpy(dev,"LPT1:");
439 } else if (strequal(lp_fstype(snum), "IPC")) {
448 if (lp_print_ok(snum)) {
449 if (!strequal(dev, "LPT1:")) {
450 return NT_STATUS_BAD_DEVICE_TYPE;
452 } else if (strequal(lp_fstype(snum), "IPC")) {
453 if (!strequal(dev, "IPC")) {
454 return NT_STATUS_BAD_DEVICE_TYPE;
456 } else if (!strequal(dev, "A:")) {
457 return NT_STATUS_BAD_DEVICE_TYPE;
460 /* Behave as a printer if we are supposed to */
461 if (lp_print_ok(snum) && (strcmp(dev, "A:") == 0)) {
462 fstrcpy(dev, "LPT1:");
469 * Go through lookup_name etc to find the force'd group.
471 * Create a new token from src_token, replacing the primary group sid with the
475 static NTSTATUS find_forced_group(bool force_user,
476 int snum, const char *username,
480 NTSTATUS result = NT_STATUS_NO_SUCH_GROUP;
481 TALLOC_CTX *frame = talloc_stackframe();
483 enum lsa_SidType type;
485 bool user_must_be_member = False;
488 groupname = talloc_strdup(talloc_tos(), lp_force_group(snum));
489 if (groupname == NULL) {
490 DEBUG(1, ("talloc_strdup failed\n"));
491 result = NT_STATUS_NO_MEMORY;
495 if (groupname[0] == '+') {
496 user_must_be_member = True;
500 groupname = talloc_string_sub(talloc_tos(), groupname,
501 "%S", lp_servicename(snum));
502 if (groupname == NULL) {
503 DEBUG(1, ("talloc_string_sub failed\n"));
504 result = NT_STATUS_NO_MEMORY;
508 if (!lookup_name_smbconf(talloc_tos(), groupname,
509 LOOKUP_NAME_ALL|LOOKUP_NAME_GROUP,
510 NULL, NULL, &group_sid, &type)) {
511 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
516 if ((type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) &&
517 (type != SID_NAME_WKN_GRP)) {
518 DEBUG(10, ("%s is a %s, not a group\n", groupname,
519 sid_type_lookup(type)));
523 if (!sid_to_gid(&group_sid, &gid)) {
524 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
525 sid_string_dbg(&group_sid), groupname));
530 * If the user has been forced and the forced group starts with a '+',
531 * then we only set the group to be the forced group if the forced
532 * user is a member of that group. Otherwise, the meaning of the '+'
536 if (force_user && user_must_be_member) {
537 if (user_in_group_sid(username, &group_sid)) {
538 sid_copy(pgroup_sid, &group_sid);
540 DEBUG(3,("Forced group %s for member %s\n",
541 groupname, username));
543 DEBUG(0,("find_forced_group: forced user %s is not a member "
544 "of forced group %s. Disallowing access.\n",
545 username, groupname ));
546 result = NT_STATUS_MEMBER_NOT_IN_GROUP;
550 sid_copy(pgroup_sid, &group_sid);
552 DEBUG(3,("Forced group %s\n", groupname));
555 result = NT_STATUS_OK;
561 /****************************************************************************
562 Create an auth_serversupplied_info structure for a connection_struct
563 ****************************************************************************/
565 static NTSTATUS create_connection_server_info(struct smbd_server_connection *sconn,
566 TALLOC_CTX *mem_ctx, int snum,
567 struct auth_serversupplied_info *vuid_serverinfo,
569 struct auth_serversupplied_info **presult)
571 if (lp_guest_only(snum)) {
572 return make_server_info_guest(mem_ctx, presult);
575 if (vuid_serverinfo != NULL) {
577 struct auth_serversupplied_info *result;
580 * This is the normal security != share case where we have a
581 * valid vuid from the session setup. */
583 if (vuid_serverinfo->guest) {
584 if (!lp_guest_ok(snum)) {
585 DEBUG(2, ("guest user (from session setup) "
586 "not permitted to access this share "
587 "(%s)\n", lp_servicename(snum)));
588 return NT_STATUS_ACCESS_DENIED;
591 if (!user_ok_token(vuid_serverinfo->unix_name,
592 pdb_get_domain(vuid_serverinfo->sam_account),
593 vuid_serverinfo->ptok, snum)) {
594 DEBUG(2, ("user '%s' (from session setup) not "
595 "permitted to access this share "
597 vuid_serverinfo->unix_name,
598 lp_servicename(snum)));
599 return NT_STATUS_ACCESS_DENIED;
603 result = copy_serverinfo(mem_ctx, vuid_serverinfo);
604 if (result == NULL) {
605 return NT_STATUS_NO_MEMORY;
612 if (lp_security() == SEC_SHARE) {
617 /* add the sharename as a possible user name if we
618 are in share mode security */
620 add_session_user(sconn, lp_servicename(snum));
622 /* shall we let them in? */
624 if (!authorise_login(sconn, snum,user,password,&guest)) {
625 DEBUG( 2, ( "Invalid username/password for [%s]\n",
626 lp_servicename(snum)) );
627 return NT_STATUS_WRONG_PASSWORD;
630 return make_serverinfo_from_username(mem_ctx, user, guest,
634 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
635 return NT_STATUS_ACCESS_DENIED;
639 /****************************************************************************
640 Make a connection, given the snum to connect to, and the vuser of the
641 connecting user if appropriate.
642 ****************************************************************************/
644 connection_struct *make_connection_snum(struct smbd_server_connection *sconn,
645 int snum, user_struct *vuser,
650 connection_struct *conn = NULL;
651 struct smb_filename *smb_fname_cpath = NULL;
654 char addr[INET6_ADDRSTRLEN];
655 bool on_err_call_dis_hook = false;
656 bool claimed_connection = false;
663 if (NT_STATUS_IS_ERR(*pstatus = share_sanity_checks(snum, dev))) {
667 conn = conn_new(sconn);
669 DEBUG(0,("Couldn't find free connection.\n"));
670 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
674 conn->params->service = snum;
676 status = create_connection_server_info(sconn,
677 conn, snum, vuser ? vuser->server_info : NULL, password,
680 if (!NT_STATUS_IS_OK(status)) {
681 DEBUG(1, ("create_connection_server_info failed: %s\n",
687 if ((lp_guest_only(snum)) || (lp_security() == SEC_SHARE)) {
688 conn->force_user = true;
691 add_session_user(sconn, conn->server_info->unix_name);
693 safe_strcpy(conn->client_address,
694 client_addr(get_client_fd(),addr,sizeof(addr)),
695 sizeof(conn->client_address)-1);
696 conn->num_files_open = 0;
697 conn->lastused = conn->lastused_count = time(NULL);
699 conn->printer = (strncmp(dev,"LPT",3) == 0);
700 conn->ipc = ( (strncmp(dev,"IPC",3) == 0) ||
701 ( lp_enable_asu_support() && strequal(dev,"ADMIN$")) );
703 /* Case options for the share. */
704 if (lp_casesensitive(snum) == Auto) {
705 /* We will be setting this per packet. Set to be case
706 * insensitive for now. */
707 conn->case_sensitive = False;
709 conn->case_sensitive = (bool)lp_casesensitive(snum);
712 conn->case_preserve = lp_preservecase(snum);
713 conn->short_case_preserve = lp_shortpreservecase(snum);
715 conn->encrypt_level = lp_smb_encrypt(snum);
717 conn->veto_list = NULL;
718 conn->hide_list = NULL;
719 conn->veto_oplock_list = NULL;
720 conn->aio_write_behind_list = NULL;
722 conn->read_only = lp_readonly(SNUM(conn));
723 conn->admin_user = False;
725 if (*lp_force_user(snum)) {
728 * Replace conn->server_info with a completely faked up one
729 * from the username we are forced into :-)
733 struct auth_serversupplied_info *forced_serverinfo;
735 fuser = talloc_string_sub(conn, lp_force_user(snum), "%S",
736 lp_servicename(snum));
738 *pstatus = NT_STATUS_NO_MEMORY;
742 status = make_serverinfo_from_username(
743 conn, fuser, conn->server_info->guest,
745 if (!NT_STATUS_IS_OK(status)) {
750 TALLOC_FREE(conn->server_info);
751 conn->server_info = forced_serverinfo;
753 conn->force_user = True;
754 DEBUG(3,("Forced user %s\n", fuser));
758 * If force group is true, then override
759 * any groupid stored for the connecting user.
762 if (*lp_force_group(snum)) {
764 status = find_forced_group(
765 conn->force_user, snum, conn->server_info->unix_name,
766 &conn->server_info->ptok->user_sids[1],
767 &conn->server_info->utok.gid);
769 if (!NT_STATUS_IS_OK(status)) {
775 * We need to cache this gid, to use within
776 * change_to_user() separately from the conn->server_info
777 * struct. We only use conn->server_info directly if
778 * "force_user" was set.
780 conn->force_group_gid = conn->server_info->utok.gid;
783 conn->vuid = (vuser != NULL) ? vuser->vuid : UID_FIELD_INVALID;
786 char *s = talloc_sub_advanced(talloc_tos(),
787 lp_servicename(SNUM(conn)),
788 conn->server_info->unix_name,
790 conn->server_info->utok.gid,
791 conn->server_info->sanitized_username,
792 pdb_get_domain(conn->server_info->sam_account),
795 *pstatus = NT_STATUS_NO_MEMORY;
799 if (!set_conn_connectpath(conn,s)) {
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 *pstatus = NT_STATUS_ACCESS_DENIED;
835 conn->read_only = True;
839 /* Initialise VFS function pointers */
841 if (!smbd_vfs_init(conn)) {
842 DEBUG(0, ("vfs_init failed for service %s\n",
843 lp_servicename(snum)));
844 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
848 if ((!conn->printer) && (!conn->ipc)) {
849 conn->notify_ctx = notify_init(conn, server_id_self(),
850 smbd_messaging_context(),
851 smbd_event_context(),
855 /* ROOT Activities: */
856 /* explicitly check widelinks here so that we can correctly warn
858 widelinks_warning(snum);
861 * Enforce the max connections parameter.
864 if ((lp_max_connections(snum) > 0)
865 && (count_current_connections(lp_servicename(SNUM(conn)), True) >=
866 lp_max_connections(snum))) {
868 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
869 lp_max_connections(snum), lp_servicename(snum)));
870 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
875 * Get us an entry in the connections db
877 if (!claim_connection(conn, lp_servicename(snum), 0)) {
878 DEBUG(1, ("Could not store connections entry\n"));
879 *pstatus = NT_STATUS_INTERNAL_DB_ERROR;
882 claimed_connection = true;
885 * Fix compatibility issue pointed out by Volker.
886 * We pass the conn->connectpath to the preexec
887 * scripts as a parameter, so attempt to canonicalize
888 * it here before calling the preexec scripts.
889 * We ignore errors here, as it is possible that
890 * the conn->connectpath doesn't exist yet and
891 * the preexec scripts will create them.
894 (void)canonicalize_connect_path(conn);
896 /* Preexecs are done here as they might make the dir we are to ChDir
898 /* execute any "root preexec = " line */
899 if (*lp_rootpreexec(snum)) {
900 char *cmd = talloc_sub_advanced(talloc_tos(),
901 lp_servicename(SNUM(conn)),
902 conn->server_info->unix_name,
904 conn->server_info->utok.gid,
905 conn->server_info->sanitized_username,
906 pdb_get_domain(conn->server_info->sam_account),
907 lp_rootpreexec(snum));
908 DEBUG(5,("cmd=%s\n",cmd));
909 ret = smbrun(cmd,NULL);
911 if (ret != 0 && lp_rootpreexec_close(snum)) {
912 DEBUG(1,("root preexec gave %d - failing "
913 "connection\n", ret));
914 *pstatus = NT_STATUS_ACCESS_DENIED;
919 /* USER Activites: */
920 if (!change_to_user(conn, conn->vuid)) {
921 /* No point continuing if they fail the basic checks */
922 DEBUG(0,("Can't become connected user!\n"));
923 *pstatus = NT_STATUS_LOGON_FAILURE;
930 /* Remember that a different vuid can connect later without these
933 /* Preexecs are done here as they might make the dir we are to ChDir
936 /* execute any "preexec = " line */
937 if (*lp_preexec(snum)) {
938 char *cmd = talloc_sub_advanced(talloc_tos(),
939 lp_servicename(SNUM(conn)),
940 conn->server_info->unix_name,
942 conn->server_info->utok.gid,
943 conn->server_info->sanitized_username,
944 pdb_get_domain(conn->server_info->sam_account),
946 ret = smbrun(cmd,NULL);
948 if (ret != 0 && lp_preexec_close(snum)) {
949 DEBUG(1,("preexec gave %d - failing connection\n",
951 *pstatus = NT_STATUS_ACCESS_DENIED;
957 * If widelinks are disallowed we need to canonicalise the connect
958 * path here to ensure we don't have any symlinks in the
959 * connectpath. We will be checking all paths on this connection are
960 * below this directory. We must do this after the VFS init as we
961 * depend on the realpath() pointer in the vfs table. JRA.
963 if (!lp_widelinks(snum)) {
965 /* We need to do the path canonicalization
966 * as root, as we may not have rights to
967 * this path as the user. */
969 change_to_root_user();
971 /* ROOT Activites: */
972 if (!canonicalize_connect_path(conn)) {
973 DEBUG(0, ("canonicalize_connect_path failed "
974 "for service %s, path %s\n",
975 lp_servicename(snum),
977 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
981 /* Back to the user for the VFS_CONNECT call. */
982 if (!change_to_user(conn, conn->vuid)) {
983 *pstatus = NT_STATUS_LOGON_FAILURE;
986 /* USER Activites: */
989 #ifdef WITH_FAKE_KASERVER
990 if (lp_afs_share(snum)) {
995 /* Add veto/hide lists */
996 if (!IS_IPC(conn) && !IS_PRINT(conn)) {
997 set_namearray( &conn->veto_list, lp_veto_files(snum));
998 set_namearray( &conn->hide_list, lp_hide_files(snum));
999 set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(snum));
1000 set_namearray( &conn->aio_write_behind_list,
1001 lp_aio_write_behind(snum));
1004 /* Invoke VFS make connection hook - do this before the VFS_STAT call
1005 to allow any filesystems needing user credentials to initialize
1008 if (SMB_VFS_CONNECT(conn, lp_servicename(snum),
1009 conn->server_info->unix_name) < 0) {
1010 DEBUG(0,("make_connection: VFS make connection failed!\n"));
1011 *pstatus = NT_STATUS_UNSUCCESSFUL;
1015 /* Any error exit after here needs to call the disconnect hook. */
1016 on_err_call_dis_hook = true;
1018 status = create_synthetic_smb_fname(talloc_tos(), conn->connectpath,
1019 NULL, NULL, &smb_fname_cpath);
1020 if (!NT_STATUS_IS_OK(status)) {
1025 /* win2000 does not check the permissions on the directory
1026 during the tree connect, instead relying on permission
1027 check during individual operations. To match this behaviour
1028 I have disabled this chdir check (tridge) */
1029 /* the alternative is just to check the directory exists */
1032 * we've finished with the user stuff - go back to root
1033 * so the SMB_VFS_STAT call will only fail on path errors,
1034 * not permission problems.
1036 change_to_root_user();
1038 /* ROOT Activites: */
1039 if ((ret = SMB_VFS_STAT(conn, smb_fname_cpath)) != 0 ||
1040 !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1041 if (ret == 0 && !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1042 DEBUG(0,("'%s' is not a directory, when connecting to "
1043 "[%s]\n", conn->connectpath,
1044 lp_servicename(snum)));
1046 DEBUG(0,("'%s' does not exist or permission denied "
1047 "when connecting to [%s] Error was %s\n",
1048 conn->connectpath, lp_servicename(snum),
1051 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1055 string_set(&conn->origpath,conn->connectpath);
1057 /* Figure out the characteristics of the underlying filesystem. This
1058 * assumes that all the filesystem mounted withing a share path have
1059 * the same characteristics, which is likely but not guaranteed.
1062 conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn, &conn->ts_res);
1065 * Print out the 'connected as' stuff here as we need
1066 * to know the effective uid and gid we will be using
1067 * (at least initially).
1070 if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
1071 dbgtext( "%s (%s) ", get_remote_machine_name(),
1072 conn->client_address );
1073 dbgtext( "%s", srv_is_signing_active(smbd_server_conn) ? "signed " : "");
1074 dbgtext( "connect to service %s ", lp_servicename(snum) );
1075 dbgtext( "initially as user %s ",
1076 conn->server_info->unix_name );
1077 dbgtext( "(uid=%d, gid=%d) ", (int)effuid, (int)effgid );
1078 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1084 TALLOC_FREE(smb_fname_cpath);
1085 /* We must exit this function as root. */
1086 if (geteuid() != 0) {
1087 change_to_root_user();
1089 if (on_err_call_dis_hook) {
1090 /* Call VFS disconnect hook */
1091 SMB_VFS_DISCONNECT(conn);
1093 if (claimed_connection) {
1094 yield_connection(conn, lp_servicename(snum));
1102 /****************************************************************************
1103 Make a connection to a service.
1106 ****************************************************************************/
1108 connection_struct *make_connection(struct smbd_server_connection *sconn,
1109 const char *service_in, DATA_BLOB password,
1110 const char *pdev, uint16 vuid,
1114 user_struct *vuser = NULL;
1118 char addr[INET6_ADDRSTRLEN];
1122 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1124 if (!non_root_mode() && (euid = geteuid()) != 0) {
1125 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1126 "(%u)\n", (unsigned int)euid ));
1127 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1130 if (conn_num_open(sconn) > 2047) {
1131 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1135 if(lp_security() != SEC_SHARE) {
1136 vuser = get_valid_user_struct(sconn, vuid);
1138 DEBUG(1,("make_connection: refusing to connect with "
1139 "no session setup\n"));
1140 *status = NT_STATUS_ACCESS_DENIED;
1145 /* Logic to try and connect to the correct [homes] share, preferably
1146 without too many getpwnam() lookups. This is particulary nasty for
1147 winbind usernames, where the share name isn't the same as unix
1150 The snum of the homes share is stored on the vuser at session setup
1154 if (strequal(service_in,HOMES_NAME)) {
1155 if(lp_security() != SEC_SHARE) {
1156 DATA_BLOB no_pw = data_blob_null;
1157 if (vuser->homes_snum == -1) {
1158 DEBUG(2, ("[homes] share not available for "
1159 "this user because it was not found "
1160 "or created at session setup "
1162 *status = NT_STATUS_BAD_NETWORK_NAME;
1165 DEBUG(5, ("making a connection to [homes] service "
1166 "created at session setup time\n"));
1167 return make_connection_snum(sconn,
1172 /* Security = share. Try with
1173 * current_user_info.smb_name as the username. */
1174 if (*current_user_info.smb_name) {
1175 fstring unix_username;
1176 fstrcpy(unix_username,
1177 current_user_info.smb_name);
1178 map_username(sconn, unix_username);
1179 snum = find_service(unix_username);
1182 DEBUG(5, ("making a connection to 'homes' "
1183 "service %s based on "
1184 "security=share\n", service_in));
1185 return make_connection_snum(sconn,
1191 } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
1192 && strequal(service_in,
1193 lp_servicename(vuser->homes_snum))) {
1194 DATA_BLOB no_pw = data_blob_null;
1195 DEBUG(5, ("making a connection to 'homes' service [%s] "
1196 "created at session setup time\n", service_in));
1197 return make_connection_snum(sconn,
1203 fstrcpy(service, service_in);
1205 strlower_m(service);
1207 snum = find_service(service);
1210 if (strequal(service,"IPC$") ||
1211 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1212 DEBUG(3,("refusing IPC connection to %s\n", service));
1213 *status = NT_STATUS_ACCESS_DENIED;
1217 DEBUG(3,("%s (%s) couldn't find service %s\n",
1218 get_remote_machine_name(),
1219 client_addr(get_client_fd(),addr,sizeof(addr)),
1221 *status = NT_STATUS_BAD_NETWORK_NAME;
1225 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1226 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum) != '\0')) {
1227 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1228 "(pointing to %s)\n",
1229 service, lp_msdfs_proxy(snum)));
1230 *status = NT_STATUS_BAD_NETWORK_NAME;
1234 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1236 return make_connection_snum(sconn, snum, vuser,
1241 /****************************************************************************
1243 ****************************************************************************/
1245 void close_cnum(connection_struct *conn, uint16 vuid)
1247 file_close_conn(conn);
1249 if (!IS_IPC(conn)) {
1250 dptr_closecnum(conn);
1253 change_to_root_user();
1255 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1256 get_remote_machine_name(),
1257 conn->client_address,
1258 lp_servicename(SNUM(conn))));
1260 /* Call VFS disconnect hook */
1261 SMB_VFS_DISCONNECT(conn);
1263 yield_connection(conn, lp_servicename(SNUM(conn)));
1265 /* make sure we leave the directory available for unmount */
1266 vfs_ChDir(conn, "/");
1268 /* execute any "postexec = " line */
1269 if (*lp_postexec(SNUM(conn)) &&
1270 change_to_user(conn, vuid)) {
1271 char *cmd = talloc_sub_advanced(talloc_tos(),
1272 lp_servicename(SNUM(conn)),
1273 conn->server_info->unix_name,
1275 conn->server_info->utok.gid,
1276 conn->server_info->sanitized_username,
1277 pdb_get_domain(conn->server_info->sam_account),
1278 lp_postexec(SNUM(conn)));
1281 change_to_root_user();
1284 change_to_root_user();
1285 /* execute any "root postexec = " line */
1286 if (*lp_rootpostexec(SNUM(conn))) {
1287 char *cmd = talloc_sub_advanced(talloc_tos(),
1288 lp_servicename(SNUM(conn)),
1289 conn->server_info->unix_name,
1291 conn->server_info->utok.gid,
1292 conn->server_info->sanitized_username,
1293 pdb_get_domain(conn->server_info->sam_account),
1294 lp_rootpostexec(SNUM(conn)));