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 ((servicename == NULL) || (*servicename == '\0')) {
242 if (strequal(servicename, GLOBAL_NAME)) {
246 if (asprintf(&path, "%s\\%s", KEY_SMBCONF, servicename) == -1) {
250 err = reg_open_path(NULL, path, REG_KEY_READ, get_root_nt_token(),
254 if (!W_ERROR_IS_OK(err)) {
258 res = lp_add_service(servicename, -1);
264 W_ERROR_IS_OK(reg_enumvalue(key, key, i, &value_name, &value));
266 switch (value->type) {
269 if (asprintf(&tmp, "%d", value->v.dword) == -1) {
272 lp_do_parameter(res, value_name, tmp);
277 lp_do_parameter(res, value_name, value->v.sz.str);
281 /* Ignore all the rest */
285 TALLOC_FREE(value_name);
295 void load_registry_shares(void)
297 struct registry_key *key;
302 DEBUG(8, ("load_registry_shares()\n"));
303 if (!lp_registry_shares()) {
307 err = reg_open_path(NULL, KEY_SMBCONF, REG_KEY_READ,
308 get_root_nt_token(), &key);
309 if (!(W_ERROR_IS_OK(err))) {
313 for (i=0; W_ERROR_IS_OK(reg_enumkey(key, key, i, &name, NULL)); i++) {
314 load_registry_service(name);
322 /****************************************************************************
323 Add a home service. Returns the new service number or -1 if fail.
324 ****************************************************************************/
326 int add_home_service(const char *service, const char *username, const char *homedir)
330 if (!service || !homedir)
333 if ((iHomeService = lp_servicenumber(HOMES_NAME)) < 0) {
334 if ((iHomeService = load_registry_service(HOMES_NAME)) < 0) {
340 * If this is a winbindd provided username, remove
341 * the domain component before adding the service.
342 * Log a warning if the "path=" parameter does not
343 * include any macros.
347 const char *p = strchr(service,*lp_winbind_separator());
349 /* We only want the 'user' part of the string */
355 if (!lp_add_home(service, iHomeService, username, homedir)) {
359 return lp_servicenumber(service);
364 * Find a service entry.
366 * @param service is modified (to canonical form??)
369 int find_service(fstring service)
373 all_string_sub(service,"\\","/",0);
375 iService = lp_servicenumber(service);
377 /* now handle the special case of a home directory */
379 char *phome_dir = get_user_home_dir(talloc_tos(), service);
383 * Try mapping the servicename, it may
384 * be a Windows to unix mapped user name.
386 if(map_username(service))
387 phome_dir = get_user_home_dir(
388 talloc_tos(), service);
391 DEBUG(3,("checking for home directory %s gave %s\n",service,
392 phome_dir?phome_dir:"(NULL)"));
394 iService = add_home_service(service,service /* 'username' */, phome_dir);
397 /* If we still don't have a service, attempt to add it as a printer. */
401 if ((iPrinterService = lp_servicenumber(PRINTERS_NAME)) < 0) {
402 iPrinterService = load_registry_service(PRINTERS_NAME);
404 if (iPrinterService) {
405 DEBUG(3,("checking whether %s is a valid printer name...\n", service));
406 if (pcap_printername_ok(service)) {
407 DEBUG(3,("%s is a valid printer name\n", service));
408 DEBUG(3,("adding %s as a printer service\n", service));
409 lp_add_printer(service, iPrinterService);
410 iService = lp_servicenumber(service);
412 DEBUG(0,("failed to add %s as a printer service!\n", service));
415 DEBUG(3,("%s is not a valid printer name\n", service));
420 /* Check for default vfs service? Unsure whether to implement this */
425 iService = load_registry_service(service);
428 /* Is it a usershare service ? */
429 if (iService < 0 && *lp_usershare_path()) {
430 /* Ensure the name is canonicalized. */
432 iService = load_usershare_service(service);
435 /* just possibly it's a default service? */
437 char *pdefservice = lp_defaultservice();
438 if (pdefservice && *pdefservice && !strequal(pdefservice,service) && !strstr_m(service,"..")) {
440 * We need to do a local copy here as lp_defaultservice()
441 * returns one of the rotating lp_string buffers that
442 * could get overwritten by the recursive find_service() call
443 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
445 char *defservice = SMB_STRDUP(pdefservice);
451 /* Disallow anything except explicit share names. */
452 if (strequal(defservice,HOMES_NAME) ||
453 strequal(defservice, PRINTERS_NAME) ||
454 strequal(defservice, "IPC$")) {
455 SAFE_FREE(defservice);
459 iService = find_service(defservice);
461 all_string_sub(service, "_","/",0);
462 iService = lp_add_service(service, iService);
464 SAFE_FREE(defservice);
469 if (!VALID_SNUM(iService)) {
470 DEBUG(0,("Invalid snum %d for %s\n",iService, service));
478 DEBUG(3,("find_service() failed to find service %s\n", service));
484 /****************************************************************************
485 do some basic sainity checks on the share.
486 This function modifies dev, ecode.
487 ****************************************************************************/
489 static NTSTATUS share_sanity_checks(int snum, fstring dev)
492 if (!lp_snum_ok(snum) ||
493 !check_access(smbd_server_fd(),
494 lp_hostsallow(snum), lp_hostsdeny(snum))) {
495 return NT_STATUS_ACCESS_DENIED;
498 if (dev[0] == '?' || !dev[0]) {
499 if (lp_print_ok(snum)) {
500 fstrcpy(dev,"LPT1:");
501 } else if (strequal(lp_fstype(snum), "IPC")) {
510 if (lp_print_ok(snum)) {
511 if (!strequal(dev, "LPT1:")) {
512 return NT_STATUS_BAD_DEVICE_TYPE;
514 } else if (strequal(lp_fstype(snum), "IPC")) {
515 if (!strequal(dev, "IPC")) {
516 return NT_STATUS_BAD_DEVICE_TYPE;
518 } else if (!strequal(dev, "A:")) {
519 return NT_STATUS_BAD_DEVICE_TYPE;
522 /* Behave as a printer if we are supposed to */
523 if (lp_print_ok(snum) && (strcmp(dev, "A:") == 0)) {
524 fstrcpy(dev, "LPT1:");
531 * Go through lookup_name etc to find the force'd group.
533 * Create a new token from src_token, replacing the primary group sid with the
537 static NTSTATUS find_forced_group(bool force_user,
538 int snum, const char *username,
542 NTSTATUS result = NT_STATUS_NO_SUCH_GROUP;
543 TALLOC_CTX *frame = talloc_stackframe();
545 enum lsa_SidType type;
547 bool user_must_be_member = False;
550 groupname = talloc_strdup(talloc_tos(), lp_force_group(snum));
551 if (groupname == NULL) {
552 DEBUG(1, ("talloc_strdup failed\n"));
553 result = NT_STATUS_NO_MEMORY;
557 if (groupname[0] == '+') {
558 user_must_be_member = True;
562 groupname = talloc_string_sub(talloc_tos(), groupname,
563 "%S", lp_servicename(snum));
564 if (groupname == NULL) {
565 DEBUG(1, ("talloc_string_sub failed\n"));
566 result = NT_STATUS_NO_MEMORY;
570 if (!lookup_name_smbconf(talloc_tos(), groupname,
571 LOOKUP_NAME_ALL|LOOKUP_NAME_GROUP,
572 NULL, NULL, &group_sid, &type)) {
573 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
578 if ((type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) &&
579 (type != SID_NAME_WKN_GRP)) {
580 DEBUG(10, ("%s is a %s, not a group\n", groupname,
581 sid_type_lookup(type)));
585 if (!sid_to_gid(&group_sid, &gid)) {
586 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
587 sid_string_dbg(&group_sid), groupname));
592 * If the user has been forced and the forced group starts with a '+',
593 * then we only set the group to be the forced group if the forced
594 * user is a member of that group. Otherwise, the meaning of the '+'
598 if (force_user && user_must_be_member) {
599 if (user_in_group_sid(username, &group_sid)) {
600 sid_copy(pgroup_sid, &group_sid);
602 DEBUG(3,("Forced group %s for member %s\n",
603 groupname, username));
605 DEBUG(0,("find_forced_group: forced user %s is not a member "
606 "of forced group %s. Disallowing access.\n",
607 username, groupname ));
608 result = NT_STATUS_MEMBER_NOT_IN_GROUP;
612 sid_copy(pgroup_sid, &group_sid);
614 DEBUG(3,("Forced group %s\n", groupname));
617 result = NT_STATUS_OK;
623 /****************************************************************************
624 Create an auth_serversupplied_info structure for a connection_struct
625 ****************************************************************************/
627 static NTSTATUS create_connection_server_info(TALLOC_CTX *mem_ctx, int snum,
628 struct auth_serversupplied_info *vuid_serverinfo,
630 struct auth_serversupplied_info **presult)
632 if (lp_guest_only(snum)) {
633 return make_server_info_guest(mem_ctx, presult);
636 if (vuid_serverinfo != NULL) {
638 struct auth_serversupplied_info *result;
641 * This is the normal security != share case where we have a
642 * valid vuid from the session setup. */
644 if (vuid_serverinfo->guest) {
645 if (!lp_guest_ok(snum)) {
646 DEBUG(2, ("guest user (from session setup) "
647 "not permitted to access this share "
648 "(%s)\n", lp_servicename(snum)));
649 return NT_STATUS_ACCESS_DENIED;
652 if (!user_ok_token(vuid_serverinfo->unix_name,
653 pdb_get_domain(vuid_serverinfo->sam_account),
654 vuid_serverinfo->ptok, snum)) {
655 DEBUG(2, ("user '%s' (from session setup) not "
656 "permitted to access this share "
658 vuid_serverinfo->unix_name,
659 lp_servicename(snum)));
660 return NT_STATUS_ACCESS_DENIED;
664 result = copy_serverinfo(mem_ctx, vuid_serverinfo);
665 if (result == NULL) {
666 return NT_STATUS_NO_MEMORY;
673 if (lp_security() == SEC_SHARE) {
678 /* add the sharename as a possible user name if we
679 are in share mode security */
681 add_session_user(lp_servicename(snum));
683 /* shall we let them in? */
685 if (!authorise_login(snum,user,password,&guest)) {
686 DEBUG( 2, ( "Invalid username/password for [%s]\n",
687 lp_servicename(snum)) );
688 return NT_STATUS_WRONG_PASSWORD;
691 return make_serverinfo_from_username(mem_ctx, user, guest,
695 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
696 return NT_STATUS_ACCESS_DENIED;
700 /****************************************************************************
701 Make a connection, given the snum to connect to, and the vuser of the
702 connecting user if appropriate.
703 ****************************************************************************/
705 static connection_struct *make_connection_snum(int snum, user_struct *vuser,
710 connection_struct *conn;
714 char addr[INET6_ADDRSTRLEN];
715 bool on_err_call_dis_hook = false;
719 SET_STAT_INVALID(st);
721 if (NT_STATUS_IS_ERR(*pstatus = share_sanity_checks(snum, dev))) {
727 DEBUG(0,("Couldn't find free connection.\n"));
728 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
732 conn->params->service = snum;
734 status = create_connection_server_info(
735 conn, snum, vuser ? vuser->server_info : NULL, password,
738 if (!NT_STATUS_IS_OK(status)) {
739 DEBUG(0, ("create_connection_server_info failed: %s\n",
746 if ((lp_guest_only(snum)) || (lp_security() == SEC_SHARE)) {
747 conn->force_user = true;
750 add_session_user(conn->server_info->unix_name);
752 safe_strcpy(conn->client_address,
753 client_addr(get_client_fd(),addr,sizeof(addr)),
754 sizeof(conn->client_address)-1);
755 conn->num_files_open = 0;
756 conn->lastused = conn->lastused_count = time(NULL);
758 conn->printer = (strncmp(dev,"LPT",3) == 0);
759 conn->ipc = ( (strncmp(dev,"IPC",3) == 0) ||
760 ( lp_enable_asu_support() && strequal(dev,"ADMIN$")) );
763 /* Case options for the share. */
764 if (lp_casesensitive(snum) == Auto) {
765 /* We will be setting this per packet. Set to be case
766 * insensitive for now. */
767 conn->case_sensitive = False;
769 conn->case_sensitive = (bool)lp_casesensitive(snum);
772 conn->case_preserve = lp_preservecase(snum);
773 conn->short_case_preserve = lp_shortpreservecase(snum);
775 conn->encrypt_level = lp_smb_encrypt(snum);
777 conn->veto_list = NULL;
778 conn->hide_list = NULL;
779 conn->veto_oplock_list = NULL;
780 conn->aio_write_behind_list = NULL;
781 string_set(&conn->dirpath,"");
783 conn->read_only = lp_readonly(SNUM(conn));
784 conn->admin_user = False;
786 if (*lp_force_user(snum)) {
789 * Replace conn->server_info with a completely faked up one
790 * from the username we are forced into :-)
794 struct auth_serversupplied_info *forced_serverinfo;
796 fuser = talloc_string_sub(conn, lp_force_user(snum), "%S",
797 lp_servicename(snum));
800 *pstatus = NT_STATUS_NO_MEMORY;
804 status = make_serverinfo_from_username(
805 conn, fuser, conn->server_info->guest,
807 if (!NT_STATUS_IS_OK(status)) {
813 TALLOC_FREE(conn->server_info);
814 conn->server_info = forced_serverinfo;
816 conn->force_user = True;
817 DEBUG(3,("Forced user %s\n", fuser));
821 * If force group is true, then override
822 * any groupid stored for the connecting user.
825 if (*lp_force_group(snum)) {
827 status = find_forced_group(
828 conn->force_user, snum, conn->server_info->unix_name,
829 &conn->server_info->ptok->user_sids[1],
830 &conn->server_info->utok.gid);
832 if (!NT_STATUS_IS_OK(status)) {
839 conn->vuid = (vuser != NULL) ? vuser->vuid : UID_FIELD_INVALID;
842 char *s = talloc_sub_advanced(talloc_tos(),
843 lp_servicename(SNUM(conn)),
844 conn->server_info->unix_name,
846 conn->server_info->utok.gid,
847 conn->server_info->sanitized_username,
848 pdb_get_domain(conn->server_info->sam_account),
852 *pstatus = NT_STATUS_NO_MEMORY;
856 if (!set_conn_connectpath(conn,s)) {
859 *pstatus = NT_STATUS_NO_MEMORY;
862 DEBUG(3,("Connect path is '%s' for service [%s]\n",s,
863 lp_servicename(snum)));
868 * New code to check if there's a share security descripter
869 * added from NT server manager. This is done after the
870 * smb.conf checks are done as we need a uid and token. JRA.
875 bool can_write = False;
877 can_write = share_access_check(conn->server_info->ptok,
878 lp_servicename(snum),
882 if (!share_access_check(conn->server_info->ptok,
883 lp_servicename(snum),
885 /* No access, read or write. */
886 DEBUG(0,("make_connection: connection to %s "
887 "denied due to security "
889 lp_servicename(snum)));
891 *pstatus = NT_STATUS_ACCESS_DENIED;
894 conn->read_only = True;
898 /* Initialise VFS function pointers */
900 if (!smbd_vfs_init(conn)) {
901 DEBUG(0, ("vfs_init failed for service %s\n",
902 lp_servicename(snum)));
904 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
909 * If widelinks are disallowed we need to canonicalise the connect
910 * path here to ensure we don't have any symlinks in the
911 * connectpath. We will be checking all paths on this connection are
912 * below this directory. We must do this after the VFS init as we
913 * depend on the realpath() pointer in the vfs table. JRA.
915 if (!lp_widelinks(snum)) {
916 if (!canonicalize_connect_path(conn)) {
917 DEBUG(0, ("canonicalize_connect_path failed "
918 "for service %s, path %s\n",
919 lp_servicename(snum),
922 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
927 if ((!conn->printer) && (!conn->ipc)) {
928 conn->notify_ctx = notify_init(conn, server_id_self(),
929 smbd_messaging_context(),
930 smbd_event_context(),
934 /* ROOT Activities: */
936 * Enforce the max connections parameter.
939 if ((lp_max_connections(snum) > 0)
940 && (count_current_connections(lp_servicename(SNUM(conn)), True) >=
941 lp_max_connections(snum))) {
943 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
944 lp_max_connections(snum), lp_servicename(snum)));
946 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
951 * Get us an entry in the connections db
953 if (!claim_connection(conn, lp_servicename(snum), 0)) {
954 DEBUG(1, ("Could not store connections entry\n"));
956 *pstatus = NT_STATUS_INTERNAL_DB_ERROR;
960 /* Preexecs are done here as they might make the dir we are to ChDir
962 /* execute any "root preexec = " line */
963 if (*lp_rootpreexec(snum)) {
964 char *cmd = talloc_sub_advanced(talloc_tos(),
965 lp_servicename(SNUM(conn)),
966 conn->server_info->unix_name,
968 conn->server_info->utok.gid,
969 conn->server_info->sanitized_username,
970 pdb_get_domain(conn->server_info->sam_account),
971 lp_rootpreexec(snum));
972 DEBUG(5,("cmd=%s\n",cmd));
973 ret = smbrun(cmd,NULL);
975 if (ret != 0 && lp_rootpreexec_close(snum)) {
976 DEBUG(1,("root preexec gave %d - failing "
977 "connection\n", ret));
978 yield_connection(conn, lp_servicename(snum));
980 *pstatus = NT_STATUS_ACCESS_DENIED;
985 /* USER Activites: */
986 if (!change_to_user(conn, conn->vuid)) {
987 /* No point continuing if they fail the basic checks */
988 DEBUG(0,("Can't become connected user!\n"));
989 yield_connection(conn, lp_servicename(snum));
991 *pstatus = NT_STATUS_LOGON_FAILURE;
995 /* Remember that a different vuid can connect later without these
998 /* Preexecs are done here as they might make the dir we are to ChDir
1001 /* execute any "preexec = " line */
1002 if (*lp_preexec(snum)) {
1003 char *cmd = talloc_sub_advanced(talloc_tos(),
1004 lp_servicename(SNUM(conn)),
1005 conn->server_info->unix_name,
1007 conn->server_info->utok.gid,
1008 conn->server_info->sanitized_username,
1009 pdb_get_domain(conn->server_info->sam_account),
1011 ret = smbrun(cmd,NULL);
1013 if (ret != 0 && lp_preexec_close(snum)) {
1014 DEBUG(1,("preexec gave %d - failing connection\n",
1016 *pstatus = NT_STATUS_ACCESS_DENIED;
1021 #ifdef WITH_FAKE_KASERVER
1022 if (lp_afs_share(snum)) {
1027 /* Add veto/hide lists */
1028 if (!IS_IPC(conn) && !IS_PRINT(conn)) {
1029 set_namearray( &conn->veto_list, lp_veto_files(snum));
1030 set_namearray( &conn->hide_list, lp_hide_files(snum));
1031 set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(snum));
1032 set_namearray( &conn->aio_write_behind_list,
1033 lp_aio_write_behind(snum));
1036 /* Invoke VFS make connection hook - do this before the VFS_STAT call
1037 to allow any filesystems needing user credentials to initialize
1040 if (SMB_VFS_CONNECT(conn, lp_servicename(snum),
1041 conn->server_info->unix_name) < 0) {
1042 DEBUG(0,("make_connection: VFS make connection failed!\n"));
1043 *pstatus = NT_STATUS_UNSUCCESSFUL;
1047 /* Any error exit after here needs to call the disconnect hook. */
1048 on_err_call_dis_hook = true;
1050 /* win2000 does not check the permissions on the directory
1051 during the tree connect, instead relying on permission
1052 check during individual operations. To match this behaviour
1053 I have disabled this chdir check (tridge) */
1054 /* the alternative is just to check the directory exists */
1055 if ((ret = SMB_VFS_STAT(conn, conn->connectpath, &st)) != 0 ||
1056 !S_ISDIR(st.st_mode)) {
1057 if (ret == 0 && !S_ISDIR(st.st_mode)) {
1058 DEBUG(0,("'%s' is not a directory, when connecting to "
1059 "[%s]\n", conn->connectpath,
1060 lp_servicename(snum)));
1062 DEBUG(0,("'%s' does not exist or permission denied "
1063 "when connecting to [%s] Error was %s\n",
1064 conn->connectpath, lp_servicename(snum),
1067 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1071 string_set(&conn->origpath,conn->connectpath);
1073 #if SOFTLINK_OPTIMISATION
1074 /* resolve any soft links early if possible */
1075 if (vfs_ChDir(conn,conn->connectpath) == 0) {
1076 TALLOC_CTX *ctx = talloc_tos();
1077 char *s = vfs_GetWd(ctx,s);
1079 *status = map_nt_error_from_unix(errno);
1082 if (!set_conn_connectpath(conn,s)) {
1083 *status = NT_STATUS_NO_MEMORY;
1086 vfs_ChDir(conn,conn->connectpath);
1090 /* Figure out the characteristics of the underlying filesystem. This
1091 * assumes that all the filesystem mounted withing a share path have
1092 * the same characteristics, which is likely but not guaranteed.
1095 conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn);
1098 * Print out the 'connected as' stuff here as we need
1099 * to know the effective uid and gid we will be using
1100 * (at least initially).
1103 if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
1104 dbgtext( "%s (%s) ", get_remote_machine_name(),
1105 conn->client_address );
1106 dbgtext( "%s", srv_is_signing_active() ? "signed " : "");
1107 dbgtext( "connect to service %s ", lp_servicename(snum) );
1108 dbgtext( "initially as user %s ",
1109 conn->server_info->unix_name );
1110 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1111 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1114 /* we've finished with the user stuff - go back to root */
1115 change_to_root_user();
1120 change_to_root_user();
1121 if (on_err_call_dis_hook) {
1122 /* Call VFS disconnect hook */
1123 SMB_VFS_DISCONNECT(conn);
1125 yield_connection(conn, lp_servicename(snum));
1130 /****************************************************************************
1131 Make a connection to a service.
1134 ****************************************************************************/
1136 connection_struct *make_connection(const char *service_in, DATA_BLOB password,
1137 const char *pdev, uint16 vuid,
1141 user_struct *vuser = NULL;
1145 char addr[INET6_ADDRSTRLEN];
1149 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1151 if (!non_root_mode() && (euid = geteuid()) != 0) {
1152 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1153 "(%u)\n", (unsigned int)euid ));
1154 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1157 if (conn_num_open() > 2047) {
1158 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1162 if(lp_security() != SEC_SHARE) {
1163 vuser = get_valid_user_struct(vuid);
1165 DEBUG(1,("make_connection: refusing to connect with "
1166 "no session setup\n"));
1167 *status = NT_STATUS_ACCESS_DENIED;
1172 /* Logic to try and connect to the correct [homes] share, preferably
1173 without too many getpwnam() lookups. This is particulary nasty for
1174 winbind usernames, where the share name isn't the same as unix
1177 The snum of the homes share is stored on the vuser at session setup
1181 if (strequal(service_in,HOMES_NAME)) {
1182 if(lp_security() != SEC_SHARE) {
1183 DATA_BLOB no_pw = data_blob_null;
1184 if (vuser->homes_snum == -1) {
1185 DEBUG(2, ("[homes] share not available for "
1186 "this user because it was not found "
1187 "or created at session setup "
1189 *status = NT_STATUS_BAD_NETWORK_NAME;
1192 DEBUG(5, ("making a connection to [homes] service "
1193 "created at session setup time\n"));
1194 return make_connection_snum(vuser->homes_snum,
1198 /* Security = share. Try with
1199 * current_user_info.smb_name as the username. */
1200 if (*current_user_info.smb_name) {
1201 fstring unix_username;
1202 fstrcpy(unix_username,
1203 current_user_info.smb_name);
1204 map_username(unix_username);
1205 snum = find_service(unix_username);
1208 DEBUG(5, ("making a connection to 'homes' "
1209 "service %s based on "
1210 "security=share\n", service_in));
1211 return make_connection_snum(snum, NULL,
1216 } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
1217 && strequal(service_in,
1218 lp_servicename(vuser->homes_snum))) {
1219 DATA_BLOB no_pw = data_blob_null;
1220 DEBUG(5, ("making a connection to 'homes' service [%s] "
1221 "created at session setup time\n", service_in));
1222 return make_connection_snum(vuser->homes_snum,
1227 fstrcpy(service, service_in);
1229 strlower_m(service);
1231 snum = find_service(service);
1234 if (strequal(service,"IPC$") ||
1235 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1236 DEBUG(3,("refusing IPC connection to %s\n", service));
1237 *status = NT_STATUS_ACCESS_DENIED;
1241 DEBUG(0,("%s (%s) couldn't find service %s\n",
1242 get_remote_machine_name(),
1243 client_addr(get_client_fd(),addr,sizeof(addr)),
1245 *status = NT_STATUS_BAD_NETWORK_NAME;
1249 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1250 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum) != '\0')) {
1251 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1252 "(pointing to %s)\n",
1253 service, lp_msdfs_proxy(snum)));
1254 *status = NT_STATUS_BAD_NETWORK_NAME;
1258 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1260 return make_connection_snum(snum, vuser,
1265 /****************************************************************************
1267 ****************************************************************************/
1269 void close_cnum(connection_struct *conn, uint16 vuid)
1271 file_close_conn(conn);
1273 if (!IS_IPC(conn)) {
1274 dptr_closecnum(conn);
1277 change_to_root_user();
1279 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1280 get_remote_machine_name(),
1281 conn->client_address,
1282 lp_servicename(SNUM(conn))));
1284 /* Call VFS disconnect hook */
1285 SMB_VFS_DISCONNECT(conn);
1287 yield_connection(conn, lp_servicename(SNUM(conn)));
1289 /* make sure we leave the directory available for unmount */
1290 vfs_ChDir(conn, "/");
1292 /* execute any "postexec = " line */
1293 if (*lp_postexec(SNUM(conn)) &&
1294 change_to_user(conn, vuid)) {
1295 char *cmd = talloc_sub_advanced(talloc_tos(),
1296 lp_servicename(SNUM(conn)),
1297 conn->server_info->unix_name,
1299 conn->server_info->utok.gid,
1300 conn->server_info->sanitized_username,
1301 pdb_get_domain(conn->server_info->sam_account),
1302 lp_postexec(SNUM(conn)));
1305 change_to_root_user();
1308 change_to_root_user();
1309 /* execute any "root postexec = " line */
1310 if (*lp_rootpostexec(SNUM(conn))) {
1311 char *cmd = talloc_sub_advanced(talloc_tos(),
1312 lp_servicename(SNUM(conn)),
1313 conn->server_info->unix_name,
1315 conn->server_info->utok.gid,
1316 conn->server_info->sanitized_username,
1317 pdb_get_domain(conn->server_info->sam_account),
1318 lp_rootpostexec(SNUM(conn)));