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;
651 struct smb_filename *smb_fname_cpath = NULL;
654 char addr[INET6_ADDRSTRLEN];
655 bool on_err_call_dis_hook = false;
660 if (NT_STATUS_IS_ERR(*pstatus = share_sanity_checks(snum, dev))) {
664 conn = conn_new(sconn);
666 DEBUG(0,("Couldn't find free connection.\n"));
667 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
671 conn->params->service = snum;
673 status = create_connection_server_info(sconn,
674 conn, snum, vuser ? vuser->server_info : NULL, password,
677 if (!NT_STATUS_IS_OK(status)) {
678 DEBUG(1, ("create_connection_server_info failed: %s\n",
685 if ((lp_guest_only(snum)) || (lp_security() == SEC_SHARE)) {
686 conn->force_user = true;
689 add_session_user(sconn, conn->server_info->unix_name);
691 safe_strcpy(conn->client_address,
692 client_addr(get_client_fd(),addr,sizeof(addr)),
693 sizeof(conn->client_address)-1);
694 conn->num_files_open = 0;
695 conn->lastused = conn->lastused_count = time(NULL);
697 conn->printer = (strncmp(dev,"LPT",3) == 0);
698 conn->ipc = ( (strncmp(dev,"IPC",3) == 0) ||
699 ( lp_enable_asu_support() && strequal(dev,"ADMIN$")) );
701 /* Case options for the share. */
702 if (lp_casesensitive(snum) == Auto) {
703 /* We will be setting this per packet. Set to be case
704 * insensitive for now. */
705 conn->case_sensitive = False;
707 conn->case_sensitive = (bool)lp_casesensitive(snum);
710 conn->case_preserve = lp_preservecase(snum);
711 conn->short_case_preserve = lp_shortpreservecase(snum);
713 conn->encrypt_level = lp_smb_encrypt(snum);
715 conn->veto_list = NULL;
716 conn->hide_list = NULL;
717 conn->veto_oplock_list = NULL;
718 conn->aio_write_behind_list = NULL;
720 conn->read_only = lp_readonly(SNUM(conn));
721 conn->admin_user = False;
723 if (*lp_force_user(snum)) {
726 * Replace conn->server_info with a completely faked up one
727 * from the username we are forced into :-)
731 struct auth_serversupplied_info *forced_serverinfo;
733 fuser = talloc_string_sub(conn, lp_force_user(snum), "%S",
734 lp_servicename(snum));
737 *pstatus = NT_STATUS_NO_MEMORY;
741 status = make_serverinfo_from_username(
742 conn, fuser, conn->server_info->guest,
744 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)) {
776 * We need to cache this gid, to use within
777 * change_to_user() separately from the conn->server_info
778 * struct. We only use conn->server_info directly if
779 * "force_user" was set.
781 conn->force_group_gid = conn->server_info->utok.gid;
784 conn->vuid = (vuser != NULL) ? vuser->vuid : UID_FIELD_INVALID;
787 char *s = talloc_sub_advanced(talloc_tos(),
788 lp_servicename(SNUM(conn)),
789 conn->server_info->unix_name,
791 conn->server_info->utok.gid,
792 conn->server_info->sanitized_username,
793 pdb_get_domain(conn->server_info->sam_account),
797 *pstatus = NT_STATUS_NO_MEMORY;
801 if (!set_conn_connectpath(conn,s)) {
804 *pstatus = NT_STATUS_NO_MEMORY;
807 DEBUG(3,("Connect path is '%s' for service [%s]\n",s,
808 lp_servicename(snum)));
813 * New code to check if there's a share security descripter
814 * added from NT server manager. This is done after the
815 * smb.conf checks are done as we need a uid and token. JRA.
820 bool can_write = False;
822 can_write = share_access_check(conn->server_info->ptok,
823 lp_servicename(snum),
827 if (!share_access_check(conn->server_info->ptok,
828 lp_servicename(snum),
830 /* No access, read or write. */
831 DEBUG(0,("make_connection: connection to %s "
832 "denied due to security "
834 lp_servicename(snum)));
836 *pstatus = NT_STATUS_ACCESS_DENIED;
839 conn->read_only = True;
843 /* Initialise VFS function pointers */
845 if (!smbd_vfs_init(conn)) {
846 DEBUG(0, ("vfs_init failed for service %s\n",
847 lp_servicename(snum)));
849 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
853 if ((!conn->printer) && (!conn->ipc)) {
854 conn->notify_ctx = notify_init(conn, server_id_self(),
855 smbd_messaging_context(),
856 smbd_event_context(),
860 /* ROOT Activities: */
861 /* explicitly check widelinks here so that we can correctly warn
863 widelinks_warning(snum);
866 * Enforce the max connections parameter.
869 if ((lp_max_connections(snum) > 0)
870 && (count_current_connections(lp_servicename(SNUM(conn)), True) >=
871 lp_max_connections(snum))) {
873 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
874 lp_max_connections(snum), lp_servicename(snum)));
876 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
881 * Get us an entry in the connections db
883 if (!claim_connection(conn, lp_servicename(snum), 0)) {
884 DEBUG(1, ("Could not store connections entry\n"));
886 *pstatus = NT_STATUS_INTERNAL_DB_ERROR;
891 * Fix compatibility issue pointed out by Volker.
892 * We pass the conn->connectpath to the preexec
893 * scripts as a parameter, so attempt to canonicalize
894 * it here before calling the preexec scripts.
895 * We ignore errors here, as it is possible that
896 * the conn->connectpath doesn't exist yet and
897 * the preexec scripts will create them.
900 (void)canonicalize_connect_path(conn);
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));
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));
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;
964 * If widelinks are disallowed we need to canonicalise the connect
965 * path here to ensure we don't have any symlinks in the
966 * connectpath. We will be checking all paths on this connection are
967 * below this directory. We must do this after the VFS init as we
968 * depend on the realpath() pointer in the vfs table. JRA.
970 if (!lp_widelinks(snum)) {
971 if (!canonicalize_connect_path(conn)) {
972 DEBUG(0, ("canonicalize_connect_path failed "
973 "for service %s, path %s\n",
974 lp_servicename(snum),
976 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
981 #ifdef WITH_FAKE_KASERVER
982 if (lp_afs_share(snum)) {
987 /* Add veto/hide lists */
988 if (!IS_IPC(conn) && !IS_PRINT(conn)) {
989 set_namearray( &conn->veto_list, lp_veto_files(snum));
990 set_namearray( &conn->hide_list, lp_hide_files(snum));
991 set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(snum));
992 set_namearray( &conn->aio_write_behind_list,
993 lp_aio_write_behind(snum));
996 /* Invoke VFS make connection hook - do this before the VFS_STAT call
997 to allow any filesystems needing user credentials to initialize
1000 if (SMB_VFS_CONNECT(conn, lp_servicename(snum),
1001 conn->server_info->unix_name) < 0) {
1002 DEBUG(0,("make_connection: VFS make connection failed!\n"));
1003 *pstatus = NT_STATUS_UNSUCCESSFUL;
1007 /* Any error exit after here needs to call the disconnect hook. */
1008 on_err_call_dis_hook = true;
1010 status = create_synthetic_smb_fname(talloc_tos(), conn->connectpath,
1011 NULL, NULL, &smb_fname_cpath);
1012 if (!NT_STATUS_IS_OK(status)) {
1017 /* win2000 does not check the permissions on the directory
1018 during the tree connect, instead relying on permission
1019 check during individual operations. To match this behaviour
1020 I have disabled this chdir check (tridge) */
1021 /* the alternative is just to check the directory exists */
1022 if (SMB_VFS_STAT(conn, smb_fname_cpath) == 0) {
1023 if (!S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1024 DEBUG(0,("'%s' is not a directory, when connecting to "
1025 "[%s]\n", conn->connectpath,
1026 lp_servicename(snum)));
1027 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1031 /* Stat failed. Bail on any error except permission denied. */
1032 if (errno != EACCES) {
1033 DEBUG(0,("Connecting to share [%s], path '%s' "
1035 lp_servicename(snum),
1038 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1041 /* As Windows does, on permsission denied we continue.
1042 * Pathname calls fail, not TconX calls. */
1045 string_set(&conn->origpath,conn->connectpath);
1047 #if SOFTLINK_OPTIMISATION
1048 /* resolve any soft links early if possible */
1049 if (vfs_ChDir(conn,conn->connectpath) == 0) {
1050 TALLOC_CTX *ctx = talloc_tos();
1051 char *s = vfs_GetWd(ctx,s);
1053 *status = map_nt_error_from_unix(errno);
1056 if (!set_conn_connectpath(conn,s)) {
1057 *status = NT_STATUS_NO_MEMORY;
1060 vfs_ChDir(conn,conn->connectpath);
1064 /* Figure out the characteristics of the underlying filesystem. This
1065 * assumes that all the filesystem mounted withing a share path have
1066 * the same characteristics, which is likely but not guaranteed.
1069 conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn, &conn->ts_res);
1072 * Print out the 'connected as' stuff here as we need
1073 * to know the effective uid and gid we will be using
1074 * (at least initially).
1077 if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
1078 dbgtext( "%s (%s) ", get_remote_machine_name(),
1079 conn->client_address );
1080 dbgtext( "%s", srv_is_signing_active(smbd_server_conn) ? "signed " : "");
1081 dbgtext( "connect to service %s ", lp_servicename(snum) );
1082 dbgtext( "initially as user %s ",
1083 conn->server_info->unix_name );
1084 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1085 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1088 /* we've finished with the user stuff - go back to root */
1089 change_to_root_user();
1093 TALLOC_FREE(smb_fname_cpath);
1094 change_to_root_user();
1095 if (on_err_call_dis_hook) {
1096 /* Call VFS disconnect hook */
1097 SMB_VFS_DISCONNECT(conn);
1099 yield_connection(conn, lp_servicename(snum));
1104 /****************************************************************************
1105 Make a connection to a service.
1108 ****************************************************************************/
1110 connection_struct *make_connection(struct smbd_server_connection *sconn,
1111 const char *service_in, DATA_BLOB password,
1112 const char *pdev, uint16 vuid,
1116 user_struct *vuser = NULL;
1120 char addr[INET6_ADDRSTRLEN];
1124 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1126 if (!non_root_mode() && (euid = geteuid()) != 0) {
1127 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1128 "(%u)\n", (unsigned int)euid ));
1129 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1132 if (conn_num_open(sconn) > 2047) {
1133 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1137 if(lp_security() != SEC_SHARE) {
1138 vuser = get_valid_user_struct(sconn, vuid);
1140 DEBUG(1,("make_connection: refusing to connect with "
1141 "no session setup\n"));
1142 *status = NT_STATUS_ACCESS_DENIED;
1147 /* Logic to try and connect to the correct [homes] share, preferably
1148 without too many getpwnam() lookups. This is particulary nasty for
1149 winbind usernames, where the share name isn't the same as unix
1152 The snum of the homes share is stored on the vuser at session setup
1156 if (strequal(service_in,HOMES_NAME)) {
1157 if(lp_security() != SEC_SHARE) {
1158 DATA_BLOB no_pw = data_blob_null;
1159 if (vuser->homes_snum == -1) {
1160 DEBUG(2, ("[homes] share not available for "
1161 "this user because it was not found "
1162 "or created at session setup "
1164 *status = NT_STATUS_BAD_NETWORK_NAME;
1167 DEBUG(5, ("making a connection to [homes] service "
1168 "created at session setup time\n"));
1169 return make_connection_snum(sconn,
1174 /* Security = share. Try with
1175 * current_user_info.smb_name as the username. */
1176 if (*current_user_info.smb_name) {
1177 fstring unix_username;
1178 fstrcpy(unix_username,
1179 current_user_info.smb_name);
1180 map_username(sconn, unix_username);
1181 snum = find_service(unix_username);
1184 DEBUG(5, ("making a connection to 'homes' "
1185 "service %s based on "
1186 "security=share\n", service_in));
1187 return make_connection_snum(sconn,
1193 } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
1194 && strequal(service_in,
1195 lp_servicename(vuser->homes_snum))) {
1196 DATA_BLOB no_pw = data_blob_null;
1197 DEBUG(5, ("making a connection to 'homes' service [%s] "
1198 "created at session setup time\n", service_in));
1199 return make_connection_snum(sconn,
1205 fstrcpy(service, service_in);
1207 strlower_m(service);
1209 snum = find_service(service);
1212 if (strequal(service,"IPC$") ||
1213 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1214 DEBUG(3,("refusing IPC connection to %s\n", service));
1215 *status = NT_STATUS_ACCESS_DENIED;
1219 DEBUG(3,("%s (%s) couldn't find service %s\n",
1220 get_remote_machine_name(),
1221 client_addr(get_client_fd(),addr,sizeof(addr)),
1223 *status = NT_STATUS_BAD_NETWORK_NAME;
1227 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1228 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum) != '\0')) {
1229 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1230 "(pointing to %s)\n",
1231 service, lp_msdfs_proxy(snum)));
1232 *status = NT_STATUS_BAD_NETWORK_NAME;
1236 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1238 return make_connection_snum(sconn, snum, vuser,
1243 /****************************************************************************
1245 ****************************************************************************/
1247 void close_cnum(connection_struct *conn, uint16 vuid)
1249 file_close_conn(conn);
1251 if (!IS_IPC(conn)) {
1252 dptr_closecnum(conn);
1255 change_to_root_user();
1257 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1258 get_remote_machine_name(),
1259 conn->client_address,
1260 lp_servicename(SNUM(conn))));
1262 /* Call VFS disconnect hook */
1263 SMB_VFS_DISCONNECT(conn);
1265 yield_connection(conn, lp_servicename(SNUM(conn)));
1267 /* make sure we leave the directory available for unmount */
1268 vfs_ChDir(conn, "/");
1270 /* execute any "postexec = " line */
1271 if (*lp_postexec(SNUM(conn)) &&
1272 change_to_user(conn, vuid)) {
1273 char *cmd = talloc_sub_advanced(talloc_tos(),
1274 lp_servicename(SNUM(conn)),
1275 conn->server_info->unix_name,
1277 conn->server_info->utok.gid,
1278 conn->server_info->sanitized_username,
1279 pdb_get_domain(conn->server_info->sam_account),
1280 lp_postexec(SNUM(conn)));
1283 change_to_root_user();
1286 change_to_root_user();
1287 /* execute any "root postexec = " line */
1288 if (*lp_rootpostexec(SNUM(conn))) {
1289 char *cmd = talloc_sub_advanced(talloc_tos(),
1290 lp_servicename(SNUM(conn)),
1291 conn->server_info->unix_name,
1293 conn->server_info->utok.gid,
1294 conn->server_info->sanitized_username,
1295 pdb_get_domain(conn->server_info->sam_account),
1296 lp_rootpostexec(SNUM(conn)));