2 Unix SMB/CIFS implementation.
3 service (connection) opening and closing
4 Copyright (C) Andrew Tridgell 1992-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 extern userdom_struct current_user_info;
24 static bool canonicalize_connect_path(connection_struct *conn)
26 #ifdef REALPATH_TAKES_NULL
28 char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath,NULL);
32 ret = set_conn_connectpath(conn,resolved_name);
33 SAFE_FREE(resolved_name);
36 char resolved_name_buf[PATH_MAX+1];
37 char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath,resolved_name_buf);
41 return set_conn_connectpath(conn,resolved_name);
42 #endif /* REALPATH_TAKES_NULL */
45 /****************************************************************************
46 Ensure when setting connectpath it is a canonicalized (no ./ // or ../)
47 absolute path stating in / and not ending in /.
48 Observent people will notice a similarity between this and check_path_syntax :-).
49 ****************************************************************************/
51 bool set_conn_connectpath(connection_struct *conn, const char *connectpath)
55 const char *s = connectpath;
56 bool start_of_name_component = true;
58 destname = SMB_STRDUP(connectpath);
64 *d++ = '/'; /* Always start with root. */
68 /* Eat multiple '/' */
72 if ((d > destname + 1) && (*s != '\0')) {
75 start_of_name_component = True;
79 if (start_of_name_component) {
80 if ((s[0] == '.') && (s[1] == '.') && (s[2] == '/' || s[2] == '\0')) {
81 /* Uh oh - "/../" or "/..\0" ! */
83 /* Go past the ../ or .. */
87 s += 2; /* Go past the .. */
90 /* If we just added a '/' - delete it */
91 if ((d > destname) && (*(d-1) == '/')) {
96 /* Are we at the start ? Can't go back further if so. */
98 *d++ = '/'; /* Can't delete root */
101 /* Go back one level... */
102 /* Decrement d first as d points to the *next* char to write into. */
103 for (d--; d > destname; d--) {
108 /* We're still at the start of a name component, just the previous one. */
110 } else if ((s[0] == '.') && ((s[1] == '\0') || s[1] == '/')) {
111 /* Component of pathname can't be "." only - skip the '.' . */
125 /* Get the size of the next MB character. */
126 next_codepoint(s,&siz);
147 start_of_name_component = false;
151 /* And must not end in '/' */
152 if (d > destname + 1 && (*(d-1) == '/')) {
156 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
157 lp_servicename(SNUM(conn)), destname ));
159 string_set(&conn->connectpath, destname);
164 /****************************************************************************
165 Load parameters specific to a connection/service.
166 ****************************************************************************/
168 bool set_current_service(connection_struct *conn, uint16 flags, bool do_chdir)
170 static connection_struct *last_conn;
171 static uint16 last_flags;
179 conn->lastused_count++;
184 vfs_ChDir(conn,conn->connectpath) != 0 &&
185 vfs_ChDir(conn,conn->origpath) != 0) {
186 DEBUG(0,("chdir (%s) failed\n",
191 if ((conn == last_conn) && (last_flags == flags)) {
198 /* Obey the client case sensitivity requests - only for clients that support it. */
199 switch (lp_casesensitive(snum)) {
202 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
203 enum remote_arch_types ra_type = get_remote_arch();
204 if ((ra_type != RA_SAMBA) && (ra_type != RA_CIFSFS)) {
205 /* Client can't support per-packet case sensitive pathnames. */
206 conn->case_sensitive = False;
208 conn->case_sensitive = !(flags & FLAG_CASELESS_PATHNAMES);
213 conn->case_sensitive = True;
216 conn->case_sensitive = False;
222 static int load_registry_service(const char *servicename)
224 struct registry_key *key;
230 struct registry_value *value;
234 if (!lp_registry_shares()) {
238 if (strequal(servicename, GLOBAL_NAME)) {
242 if (asprintf(&path, "%s\\%s", KEY_SMBCONF, servicename) == -1) {
246 err = reg_open_path(NULL, path, REG_KEY_READ, get_root_nt_token(),
250 if (!W_ERROR_IS_OK(err)) {
254 res = lp_add_service(servicename, -1);
260 W_ERROR_IS_OK(reg_enumvalue(key, key, i, &value_name, &value));
262 switch (value->type) {
265 if (asprintf(&tmp, "%d", value->v.dword) == -1) {
268 lp_do_parameter(res, value_name, tmp);
273 lp_do_parameter(res, value_name, value->v.sz.str);
277 /* Ignore all the rest */
281 TALLOC_FREE(value_name);
291 void load_registry_shares(void)
293 struct registry_key *key;
298 DEBUG(8, ("load_registry_shares()\n"));
299 if (!lp_registry_shares()) {
303 err = reg_open_path(NULL, KEY_SMBCONF, REG_KEY_READ,
304 get_root_nt_token(), &key);
305 if (!(W_ERROR_IS_OK(err))) {
309 for (i=0; W_ERROR_IS_OK(reg_enumkey(key, key, i, &name, NULL)); i++) {
310 load_registry_service(name);
318 /****************************************************************************
319 Add a home service. Returns the new service number or -1 if fail.
320 ****************************************************************************/
322 int add_home_service(const char *service, const char *username, const char *homedir)
326 if (!service || !homedir)
329 if ((iHomeService = lp_servicenumber(HOMES_NAME)) < 0) {
330 if ((iHomeService = load_registry_service(HOMES_NAME)) < 0) {
336 * If this is a winbindd provided username, remove
337 * the domain component before adding the service.
338 * Log a warning if the "path=" parameter does not
339 * include any macros.
343 const char *p = strchr(service,*lp_winbind_separator());
345 /* We only want the 'user' part of the string */
351 if (!lp_add_home(service, iHomeService, username, homedir)) {
355 return lp_servicenumber(service);
360 * Find a service entry.
362 * @param service is modified (to canonical form??)
365 int find_service(fstring service)
369 all_string_sub(service,"\\","/",0);
371 iService = lp_servicenumber(service);
373 /* now handle the special case of a home directory */
375 char *phome_dir = get_user_home_dir(talloc_tos(), service);
379 * Try mapping the servicename, it may
380 * be a Windows to unix mapped user name.
382 if(map_username(service))
383 phome_dir = get_user_home_dir(
384 talloc_tos(), service);
387 DEBUG(3,("checking for home directory %s gave %s\n",service,
388 phome_dir?phome_dir:"(NULL)"));
390 iService = add_home_service(service,service /* 'username' */, phome_dir);
393 /* If we still don't have a service, attempt to add it as a printer. */
397 if ((iPrinterService = lp_servicenumber(PRINTERS_NAME)) < 0) {
398 iPrinterService = load_registry_service(PRINTERS_NAME);
400 if (iPrinterService) {
401 DEBUG(3,("checking whether %s is a valid printer name...\n", service));
402 if (pcap_printername_ok(service)) {
403 DEBUG(3,("%s is a valid printer name\n", service));
404 DEBUG(3,("adding %s as a printer service\n", service));
405 lp_add_printer(service, iPrinterService);
406 iService = lp_servicenumber(service);
408 DEBUG(0,("failed to add %s as a printer service!\n", service));
411 DEBUG(3,("%s is not a valid printer name\n", service));
416 /* Check for default vfs service? Unsure whether to implement this */
421 iService = load_registry_service(service);
424 /* Is it a usershare service ? */
425 if (iService < 0 && *lp_usershare_path()) {
426 /* Ensure the name is canonicalized. */
428 iService = load_usershare_service(service);
431 /* just possibly it's a default service? */
433 char *pdefservice = lp_defaultservice();
434 if (pdefservice && *pdefservice && !strequal(pdefservice,service) && !strstr_m(service,"..")) {
436 * We need to do a local copy here as lp_defaultservice()
437 * returns one of the rotating lp_string buffers that
438 * could get overwritten by the recursive find_service() call
439 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
441 char *defservice = SMB_STRDUP(pdefservice);
447 /* Disallow anything except explicit share names. */
448 if (strequal(defservice,HOMES_NAME) ||
449 strequal(defservice, PRINTERS_NAME) ||
450 strequal(defservice, "IPC$")) {
451 SAFE_FREE(defservice);
455 iService = find_service(defservice);
457 all_string_sub(service, "_","/",0);
458 iService = lp_add_service(service, iService);
460 SAFE_FREE(defservice);
465 if (!VALID_SNUM(iService)) {
466 DEBUG(0,("Invalid snum %d for %s\n",iService, service));
474 DEBUG(3,("find_service() failed to find service %s\n", service));
480 /****************************************************************************
481 do some basic sainity checks on the share.
482 This function modifies dev, ecode.
483 ****************************************************************************/
485 static NTSTATUS share_sanity_checks(int snum, fstring dev)
488 if (!lp_snum_ok(snum) ||
489 !check_access(smbd_server_fd(),
490 lp_hostsallow(snum), lp_hostsdeny(snum))) {
491 return NT_STATUS_ACCESS_DENIED;
494 if (dev[0] == '?' || !dev[0]) {
495 if (lp_print_ok(snum)) {
496 fstrcpy(dev,"LPT1:");
497 } else if (strequal(lp_fstype(snum), "IPC")) {
506 if (lp_print_ok(snum)) {
507 if (!strequal(dev, "LPT1:")) {
508 return NT_STATUS_BAD_DEVICE_TYPE;
510 } else if (strequal(lp_fstype(snum), "IPC")) {
511 if (!strequal(dev, "IPC")) {
512 return NT_STATUS_BAD_DEVICE_TYPE;
514 } else if (!strequal(dev, "A:")) {
515 return NT_STATUS_BAD_DEVICE_TYPE;
518 /* Behave as a printer if we are supposed to */
519 if (lp_print_ok(snum) && (strcmp(dev, "A:") == 0)) {
520 fstrcpy(dev, "LPT1:");
527 * Go through lookup_name etc to find the force'd group.
529 * Create a new token from src_token, replacing the primary group sid with the
533 static NTSTATUS find_forced_group(bool force_user,
534 int snum, const char *username,
538 NTSTATUS result = NT_STATUS_NO_SUCH_GROUP;
539 TALLOC_CTX *frame = talloc_stackframe();
541 enum lsa_SidType type;
543 bool user_must_be_member = False;
546 groupname = talloc_strdup(talloc_tos(), lp_force_group(snum));
547 if (groupname == NULL) {
548 DEBUG(1, ("talloc_strdup failed\n"));
549 result = NT_STATUS_NO_MEMORY;
553 if (groupname[0] == '+') {
554 user_must_be_member = True;
558 groupname = talloc_string_sub(talloc_tos(), groupname,
559 "%S", lp_servicename(snum));
560 if (groupname == NULL) {
561 DEBUG(1, ("talloc_string_sub failed\n"));
562 result = NT_STATUS_NO_MEMORY;
566 if (!lookup_name_smbconf(talloc_tos(), groupname,
567 LOOKUP_NAME_ALL|LOOKUP_NAME_GROUP,
568 NULL, NULL, &group_sid, &type)) {
569 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
574 if ((type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) &&
575 (type != SID_NAME_WKN_GRP)) {
576 DEBUG(10, ("%s is a %s, not a group\n", groupname,
577 sid_type_lookup(type)));
581 if (!sid_to_gid(&group_sid, &gid)) {
582 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
583 sid_string_dbg(&group_sid), groupname));
588 * If the user has been forced and the forced group starts with a '+',
589 * then we only set the group to be the forced group if the forced
590 * user is a member of that group. Otherwise, the meaning of the '+'
594 if (force_user && user_must_be_member) {
595 if (user_in_group_sid(username, &group_sid)) {
596 sid_copy(pgroup_sid, &group_sid);
598 DEBUG(3,("Forced group %s for member %s\n",
599 groupname, username));
601 DEBUG(0,("find_forced_group: forced user %s is not a member "
602 "of forced group %s. Disallowing access.\n",
603 username, groupname ));
604 result = NT_STATUS_MEMBER_NOT_IN_GROUP;
608 sid_copy(pgroup_sid, &group_sid);
610 DEBUG(3,("Forced group %s\n", groupname));
613 result = NT_STATUS_OK;
619 /****************************************************************************
620 Create an auth_serversupplied_info structure for a connection_struct
621 ****************************************************************************/
623 static NTSTATUS create_connection_server_info(TALLOC_CTX *mem_ctx, int snum,
624 struct auth_serversupplied_info *vuid_serverinfo,
626 struct auth_serversupplied_info **presult)
628 if (lp_guest_only(snum)) {
629 return make_server_info_guest(mem_ctx, presult);
632 if (vuid_serverinfo != NULL) {
634 struct auth_serversupplied_info *result;
637 * This is the normal security != share case where we have a
638 * valid vuid from the session setup. */
640 if (vuid_serverinfo->guest) {
641 if (!lp_guest_ok(snum)) {
642 DEBUG(2, ("guest user (from session setup) "
643 "not permitted to access this share "
644 "(%s)\n", lp_servicename(snum)));
645 return NT_STATUS_ACCESS_DENIED;
648 if (!user_ok_token(vuid_serverinfo->unix_name,
649 pdb_get_domain(vuid_serverinfo->sam_account),
650 vuid_serverinfo->ptok, snum)) {
651 DEBUG(2, ("user '%s' (from session setup) not "
652 "permitted to access this share "
654 vuid_serverinfo->unix_name,
655 lp_servicename(snum)));
656 return NT_STATUS_ACCESS_DENIED;
660 result = copy_serverinfo(mem_ctx, vuid_serverinfo);
661 if (result == NULL) {
662 return NT_STATUS_NO_MEMORY;
669 if (lp_security() == SEC_SHARE) {
674 /* add the sharename as a possible user name if we
675 are in share mode security */
677 add_session_user(lp_servicename(snum));
679 /* shall we let them in? */
681 if (!authorise_login(snum,user,password,&guest)) {
682 DEBUG( 2, ( "Invalid username/password for [%s]\n",
683 lp_servicename(snum)) );
684 return NT_STATUS_WRONG_PASSWORD;
687 return make_serverinfo_from_username(mem_ctx, user, guest,
691 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
692 return NT_STATUS_ACCESS_DENIED;
696 /****************************************************************************
697 Make a connection, given the snum to connect to, and the vuser of the
698 connecting user if appropriate.
699 ****************************************************************************/
701 static connection_struct *make_connection_snum(int snum, user_struct *vuser,
706 connection_struct *conn;
710 char addr[INET6_ADDRSTRLEN];
711 bool on_err_call_dis_hook = false;
715 SET_STAT_INVALID(st);
717 if (NT_STATUS_IS_ERR(*pstatus = share_sanity_checks(snum, dev))) {
723 DEBUG(0,("Couldn't find free connection.\n"));
724 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
728 conn->params->service = snum;
730 status = create_connection_server_info(
731 conn, snum, vuser ? vuser->server_info : NULL, password,
734 if (!NT_STATUS_IS_OK(status)) {
735 DEBUG(0, ("create_connection_server_info failed: %s\n",
742 if ((lp_guest_only(snum)) || (lp_security() == SEC_SHARE)) {
743 conn->force_user = true;
746 add_session_user(conn->server_info->unix_name);
748 safe_strcpy(conn->client_address,
749 client_addr(get_client_fd(),addr,sizeof(addr)),
750 sizeof(conn->client_address)-1);
751 conn->num_files_open = 0;
752 conn->lastused = conn->lastused_count = time(NULL);
754 conn->printer = (strncmp(dev,"LPT",3) == 0);
755 conn->ipc = ( (strncmp(dev,"IPC",3) == 0) ||
756 ( lp_enable_asu_support() && strequal(dev,"ADMIN$")) );
759 /* Case options for the share. */
760 if (lp_casesensitive(snum) == Auto) {
761 /* We will be setting this per packet. Set to be case
762 * insensitive for now. */
763 conn->case_sensitive = False;
765 conn->case_sensitive = (bool)lp_casesensitive(snum);
768 conn->case_preserve = lp_preservecase(snum);
769 conn->short_case_preserve = lp_shortpreservecase(snum);
771 conn->encrypt_level = lp_smb_encrypt(snum);
773 conn->veto_list = NULL;
774 conn->hide_list = NULL;
775 conn->veto_oplock_list = NULL;
776 conn->aio_write_behind_list = NULL;
777 string_set(&conn->dirpath,"");
779 conn->read_only = lp_readonly(SNUM(conn));
780 conn->admin_user = False;
782 if (*lp_force_user(snum)) {
785 * Replace conn->server_info with a completely faked up one
786 * from the username we are forced into :-)
790 struct auth_serversupplied_info *forced_serverinfo;
792 fuser = talloc_string_sub(conn, lp_force_user(snum), "%S",
793 lp_servicename(snum));
796 *pstatus = NT_STATUS_NO_MEMORY;
800 status = make_serverinfo_from_username(
801 conn, fuser, conn->server_info->guest,
803 if (!NT_STATUS_IS_OK(status)) {
809 TALLOC_FREE(conn->server_info);
810 conn->server_info = forced_serverinfo;
812 conn->force_user = True;
813 DEBUG(3,("Forced user %s\n", fuser));
817 * If force group is true, then override
818 * any groupid stored for the connecting user.
821 if (*lp_force_group(snum)) {
823 status = find_forced_group(
824 conn->force_user, snum, conn->server_info->unix_name,
825 &conn->server_info->ptok->user_sids[1],
826 &conn->server_info->utok.gid);
828 if (!NT_STATUS_IS_OK(status)) {
835 conn->vuid = (vuser != NULL) ? vuser->vuid : UID_FIELD_INVALID;
838 char *s = talloc_sub_advanced(talloc_tos(),
839 lp_servicename(SNUM(conn)),
840 conn->server_info->unix_name,
842 conn->server_info->utok.gid,
843 conn->server_info->sanitized_username,
844 pdb_get_domain(conn->server_info->sam_account),
848 *pstatus = NT_STATUS_NO_MEMORY;
852 if (!set_conn_connectpath(conn,s)) {
855 *pstatus = NT_STATUS_NO_MEMORY;
858 DEBUG(3,("Connect path is '%s' for service [%s]\n",s,
859 lp_servicename(snum)));
864 * New code to check if there's a share security descripter
865 * added from NT server manager. This is done after the
866 * smb.conf checks are done as we need a uid and token. JRA.
871 bool can_write = False;
873 can_write = share_access_check(conn->server_info->ptok,
874 lp_servicename(snum),
878 if (!share_access_check(conn->server_info->ptok,
879 lp_servicename(snum),
881 /* No access, read or write. */
882 DEBUG(0,("make_connection: connection to %s "
883 "denied due to security "
885 lp_servicename(snum)));
887 *pstatus = NT_STATUS_ACCESS_DENIED;
890 conn->read_only = True;
894 /* Initialise VFS function pointers */
896 if (!smbd_vfs_init(conn)) {
897 DEBUG(0, ("vfs_init failed for service %s\n",
898 lp_servicename(snum)));
900 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
905 * If widelinks are disallowed we need to canonicalise the connect
906 * path here to ensure we don't have any symlinks in the
907 * connectpath. We will be checking all paths on this connection are
908 * below this directory. We must do this after the VFS init as we
909 * depend on the realpath() pointer in the vfs table. JRA.
911 if (!lp_widelinks(snum)) {
912 if (!canonicalize_connect_path(conn)) {
913 DEBUG(0, ("canonicalize_connect_path failed "
914 "for service %s, path %s\n",
915 lp_servicename(snum),
918 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
923 if ((!conn->printer) && (!conn->ipc)) {
924 conn->notify_ctx = notify_init(conn, server_id_self(),
925 smbd_messaging_context(),
926 smbd_event_context(),
930 /* ROOT Activities: */
932 * Enforce the max connections parameter.
935 if ((lp_max_connections(snum) > 0)
936 && (count_current_connections(lp_servicename(SNUM(conn)), True) >=
937 lp_max_connections(snum))) {
939 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
940 lp_max_connections(snum), lp_servicename(snum)));
942 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
947 * Get us an entry in the connections db
949 if (!claim_connection(conn, lp_servicename(snum), 0)) {
950 DEBUG(1, ("Could not store connections entry\n"));
952 *pstatus = NT_STATUS_INTERNAL_DB_ERROR;
956 /* Preexecs are done here as they might make the dir we are to ChDir
958 /* execute any "root preexec = " line */
959 if (*lp_rootpreexec(snum)) {
960 char *cmd = talloc_sub_advanced(talloc_tos(),
961 lp_servicename(SNUM(conn)),
962 conn->server_info->unix_name,
964 conn->server_info->utok.gid,
965 conn->server_info->sanitized_username,
966 pdb_get_domain(conn->server_info->sam_account),
967 lp_rootpreexec(snum));
968 DEBUG(5,("cmd=%s\n",cmd));
969 ret = smbrun(cmd,NULL);
971 if (ret != 0 && lp_rootpreexec_close(snum)) {
972 DEBUG(1,("root preexec gave %d - failing "
973 "connection\n", ret));
974 yield_connection(conn, lp_servicename(snum));
976 *pstatus = NT_STATUS_ACCESS_DENIED;
981 /* USER Activites: */
982 if (!change_to_user(conn, conn->vuid)) {
983 /* No point continuing if they fail the basic checks */
984 DEBUG(0,("Can't become connected user!\n"));
985 yield_connection(conn, lp_servicename(snum));
987 *pstatus = NT_STATUS_LOGON_FAILURE;
991 /* Remember that a different vuid can connect later without these
994 /* Preexecs are done here as they might make the dir we are to ChDir
997 /* execute any "preexec = " line */
998 if (*lp_preexec(snum)) {
999 char *cmd = talloc_sub_advanced(talloc_tos(),
1000 lp_servicename(SNUM(conn)),
1001 conn->server_info->unix_name,
1003 conn->server_info->utok.gid,
1004 conn->server_info->sanitized_username,
1005 pdb_get_domain(conn->server_info->sam_account),
1007 ret = smbrun(cmd,NULL);
1009 if (ret != 0 && lp_preexec_close(snum)) {
1010 DEBUG(1,("preexec gave %d - failing connection\n",
1012 *pstatus = NT_STATUS_ACCESS_DENIED;
1017 #ifdef WITH_FAKE_KASERVER
1018 if (lp_afs_share(snum)) {
1023 /* Add veto/hide lists */
1024 if (!IS_IPC(conn) && !IS_PRINT(conn)) {
1025 set_namearray( &conn->veto_list, lp_veto_files(snum));
1026 set_namearray( &conn->hide_list, lp_hide_files(snum));
1027 set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(snum));
1028 set_namearray( &conn->aio_write_behind_list,
1029 lp_aio_write_behind(snum));
1032 /* Invoke VFS make connection hook - do this before the VFS_STAT call
1033 to allow any filesystems needing user credentials to initialize
1036 if (SMB_VFS_CONNECT(conn, lp_servicename(snum),
1037 conn->server_info->unix_name) < 0) {
1038 DEBUG(0,("make_connection: VFS make connection failed!\n"));
1039 *pstatus = NT_STATUS_UNSUCCESSFUL;
1043 /* Any error exit after here needs to call the disconnect hook. */
1044 on_err_call_dis_hook = true;
1046 /* win2000 does not check the permissions on the directory
1047 during the tree connect, instead relying on permission
1048 check during individual operations. To match this behaviour
1049 I have disabled this chdir check (tridge) */
1050 /* the alternative is just to check the directory exists */
1051 if ((ret = SMB_VFS_STAT(conn, conn->connectpath, &st)) != 0 ||
1052 !S_ISDIR(st.st_mode)) {
1053 if (ret == 0 && !S_ISDIR(st.st_mode)) {
1054 DEBUG(0,("'%s' is not a directory, when connecting to "
1055 "[%s]\n", conn->connectpath,
1056 lp_servicename(snum)));
1058 DEBUG(0,("'%s' does not exist or permission denied "
1059 "when connecting to [%s] Error was %s\n",
1060 conn->connectpath, lp_servicename(snum),
1063 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1067 string_set(&conn->origpath,conn->connectpath);
1069 #if SOFTLINK_OPTIMISATION
1070 /* resolve any soft links early if possible */
1071 if (vfs_ChDir(conn,conn->connectpath) == 0) {
1072 TALLOC_CTX *ctx = talloc_tos();
1073 char *s = vfs_GetWd(ctx,s);
1075 *status = map_nt_error_from_unix(errno);
1078 if (!set_conn_connectpath(conn,s)) {
1079 *status = NT_STATUS_NO_MEMORY;
1082 vfs_ChDir(conn,conn->connectpath);
1086 /* Figure out the characteristics of the underlying filesystem. This
1087 * assumes that all the filesystem mounted withing a share path have
1088 * the same characteristics, which is likely but not guaranteed.
1091 conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn);
1094 * Print out the 'connected as' stuff here as we need
1095 * to know the effective uid and gid we will be using
1096 * (at least initially).
1099 if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
1100 dbgtext( "%s (%s) ", get_remote_machine_name(),
1101 conn->client_address );
1102 dbgtext( "%s", srv_is_signing_active() ? "signed " : "");
1103 dbgtext( "connect to service %s ", lp_servicename(snum) );
1104 dbgtext( "initially as user %s ",
1105 conn->server_info->unix_name );
1106 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1107 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1110 /* we've finished with the user stuff - go back to root */
1111 change_to_root_user();
1116 change_to_root_user();
1117 if (on_err_call_dis_hook) {
1118 /* Call VFS disconnect hook */
1119 SMB_VFS_DISCONNECT(conn);
1121 yield_connection(conn, lp_servicename(snum));
1126 /***************************************************************************************
1127 Simple wrapper function for make_connection() to include a call to
1129 **************************************************************************************/
1131 connection_struct *make_connection_with_chdir(const char *service_in,
1133 const char *dev, uint16 vuid,
1136 connection_struct *conn = NULL;
1138 conn = make_connection(service_in, password, dev, vuid, status);
1141 * make_connection() does not change the directory for us any more
1142 * so we have to do it as a separate step --jerry
1145 if ( conn && vfs_ChDir(conn,conn->connectpath) != 0 ) {
1146 DEBUG(0,("make_connection_with_chdir: Can't change "
1147 "directory to %s for [print$] (%s)\n",
1148 conn->connectpath,strerror(errno)));
1149 yield_connection(conn, lp_servicename(SNUM(conn)));
1151 *status = NT_STATUS_UNSUCCESSFUL;
1158 /****************************************************************************
1159 Make a connection to a service.
1162 ****************************************************************************/
1164 connection_struct *make_connection(const char *service_in, DATA_BLOB password,
1165 const char *pdev, uint16 vuid,
1169 user_struct *vuser = NULL;
1173 char addr[INET6_ADDRSTRLEN];
1177 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1179 if (!non_root_mode() && (euid = geteuid()) != 0) {
1180 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1181 "(%u)\n", (unsigned int)euid ));
1182 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1185 if (conn_num_open() > 2047) {
1186 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1190 if(lp_security() != SEC_SHARE) {
1191 vuser = get_valid_user_struct(vuid);
1193 DEBUG(1,("make_connection: refusing to connect with "
1194 "no session setup\n"));
1195 *status = NT_STATUS_ACCESS_DENIED;
1200 /* Logic to try and connect to the correct [homes] share, preferably
1201 without too many getpwnam() lookups. This is particulary nasty for
1202 winbind usernames, where the share name isn't the same as unix
1205 The snum of the homes share is stored on the vuser at session setup
1209 if (strequal(service_in,HOMES_NAME)) {
1210 if(lp_security() != SEC_SHARE) {
1211 DATA_BLOB no_pw = data_blob_null;
1212 if (vuser->homes_snum == -1) {
1213 DEBUG(2, ("[homes] share not available for "
1214 "this user because it was not found "
1215 "or created at session setup "
1217 *status = NT_STATUS_BAD_NETWORK_NAME;
1220 DEBUG(5, ("making a connection to [homes] service "
1221 "created at session setup time\n"));
1222 return make_connection_snum(vuser->homes_snum,
1226 /* Security = share. Try with
1227 * current_user_info.smb_name as the username. */
1228 if (*current_user_info.smb_name) {
1229 fstring unix_username;
1230 fstrcpy(unix_username,
1231 current_user_info.smb_name);
1232 map_username(unix_username);
1233 snum = find_service(unix_username);
1236 DEBUG(5, ("making a connection to 'homes' "
1237 "service %s based on "
1238 "security=share\n", service_in));
1239 return make_connection_snum(snum, NULL,
1244 } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
1245 && strequal(service_in,
1246 lp_servicename(vuser->homes_snum))) {
1247 DATA_BLOB no_pw = data_blob_null;
1248 DEBUG(5, ("making a connection to 'homes' service [%s] "
1249 "created at session setup time\n", service_in));
1250 return make_connection_snum(vuser->homes_snum,
1255 fstrcpy(service, service_in);
1257 strlower_m(service);
1259 snum = find_service(service);
1262 if (strequal(service,"IPC$") ||
1263 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1264 DEBUG(3,("refusing IPC connection to %s\n", service));
1265 *status = NT_STATUS_ACCESS_DENIED;
1269 DEBUG(0,("%s (%s) couldn't find service %s\n",
1270 get_remote_machine_name(),
1271 client_addr(get_client_fd(),addr,sizeof(addr)),
1273 *status = NT_STATUS_BAD_NETWORK_NAME;
1277 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1278 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum) != '\0')) {
1279 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1280 "(pointing to %s)\n",
1281 service, lp_msdfs_proxy(snum)));
1282 *status = NT_STATUS_BAD_NETWORK_NAME;
1286 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1288 return make_connection_snum(snum, vuser,
1293 /****************************************************************************
1295 ****************************************************************************/
1297 void close_cnum(connection_struct *conn, uint16 vuid)
1299 file_close_conn(conn);
1301 if (!IS_IPC(conn)) {
1302 dptr_closecnum(conn);
1305 change_to_root_user();
1307 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1308 get_remote_machine_name(),
1309 conn->client_address,
1310 lp_servicename(SNUM(conn))));
1312 /* Call VFS disconnect hook */
1313 SMB_VFS_DISCONNECT(conn);
1315 yield_connection(conn, lp_servicename(SNUM(conn)));
1317 /* make sure we leave the directory available for unmount */
1318 vfs_ChDir(conn, "/");
1320 /* execute any "postexec = " line */
1321 if (*lp_postexec(SNUM(conn)) &&
1322 change_to_user(conn, vuid)) {
1323 char *cmd = talloc_sub_advanced(talloc_tos(),
1324 lp_servicename(SNUM(conn)),
1325 conn->server_info->unix_name,
1327 conn->server_info->utok.gid,
1328 conn->server_info->sanitized_username,
1329 pdb_get_domain(conn->server_info->sam_account),
1330 lp_postexec(SNUM(conn)));
1333 change_to_root_user();
1336 change_to_root_user();
1337 /* execute any "root postexec = " line */
1338 if (*lp_rootpostexec(SNUM(conn))) {
1339 char *cmd = talloc_sub_advanced(talloc_tos(),
1340 lp_servicename(SNUM(conn)),
1341 conn->server_info->unix_name,
1343 conn->server_info->utok.gid,
1344 conn->server_info->sanitized_username,
1345 pdb_get_domain(conn->server_info->sam_account),
1346 lp_rootpostexec(SNUM(conn)));