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 ((ret = SMB_VFS_STAT(conn, smb_fname_cpath)) != 0 ||
1023 !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1024 if (ret == 0 && !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1025 DEBUG(0,("'%s' is not a directory, when connecting to "
1026 "[%s]\n", conn->connectpath,
1027 lp_servicename(snum)));
1029 DEBUG(0,("'%s' does not exist or permission denied "
1030 "when connecting to [%s] Error was %s\n",
1031 conn->connectpath, lp_servicename(snum),
1034 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1038 string_set(&conn->origpath,conn->connectpath);
1040 #if SOFTLINK_OPTIMISATION
1041 /* resolve any soft links early if possible */
1042 if (vfs_ChDir(conn,conn->connectpath) == 0) {
1043 TALLOC_CTX *ctx = talloc_tos();
1044 char *s = vfs_GetWd(ctx,s);
1046 *status = map_nt_error_from_unix(errno);
1049 if (!set_conn_connectpath(conn,s)) {
1050 *status = NT_STATUS_NO_MEMORY;
1053 vfs_ChDir(conn,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)geteuid(), (int)getegid() );
1078 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1081 /* we've finished with the user stuff - go back to root */
1082 change_to_root_user();
1086 TALLOC_FREE(smb_fname_cpath);
1087 change_to_root_user();
1088 if (on_err_call_dis_hook) {
1089 /* Call VFS disconnect hook */
1090 SMB_VFS_DISCONNECT(conn);
1092 yield_connection(conn, lp_servicename(snum));
1097 /****************************************************************************
1098 Make a connection to a service.
1101 ****************************************************************************/
1103 connection_struct *make_connection(struct smbd_server_connection *sconn,
1104 const char *service_in, DATA_BLOB password,
1105 const char *pdev, uint16 vuid,
1109 user_struct *vuser = NULL;
1113 char addr[INET6_ADDRSTRLEN];
1117 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1119 if (!non_root_mode() && (euid = geteuid()) != 0) {
1120 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1121 "(%u)\n", (unsigned int)euid ));
1122 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1125 if (conn_num_open(sconn) > 2047) {
1126 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1130 if(lp_security() != SEC_SHARE) {
1131 vuser = get_valid_user_struct(sconn, vuid);
1133 DEBUG(1,("make_connection: refusing to connect with "
1134 "no session setup\n"));
1135 *status = NT_STATUS_ACCESS_DENIED;
1140 /* Logic to try and connect to the correct [homes] share, preferably
1141 without too many getpwnam() lookups. This is particulary nasty for
1142 winbind usernames, where the share name isn't the same as unix
1145 The snum of the homes share is stored on the vuser at session setup
1149 if (strequal(service_in,HOMES_NAME)) {
1150 if(lp_security() != SEC_SHARE) {
1151 DATA_BLOB no_pw = data_blob_null;
1152 if (vuser->homes_snum == -1) {
1153 DEBUG(2, ("[homes] share not available for "
1154 "this user because it was not found "
1155 "or created at session setup "
1157 *status = NT_STATUS_BAD_NETWORK_NAME;
1160 DEBUG(5, ("making a connection to [homes] service "
1161 "created at session setup time\n"));
1162 return make_connection_snum(sconn,
1167 /* Security = share. Try with
1168 * current_user_info.smb_name as the username. */
1169 if (*current_user_info.smb_name) {
1170 fstring unix_username;
1171 fstrcpy(unix_username,
1172 current_user_info.smb_name);
1173 map_username(sconn, unix_username);
1174 snum = find_service(unix_username);
1177 DEBUG(5, ("making a connection to 'homes' "
1178 "service %s based on "
1179 "security=share\n", service_in));
1180 return make_connection_snum(sconn,
1186 } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
1187 && strequal(service_in,
1188 lp_servicename(vuser->homes_snum))) {
1189 DATA_BLOB no_pw = data_blob_null;
1190 DEBUG(5, ("making a connection to 'homes' service [%s] "
1191 "created at session setup time\n", service_in));
1192 return make_connection_snum(sconn,
1198 fstrcpy(service, service_in);
1200 strlower_m(service);
1202 snum = find_service(service);
1205 if (strequal(service,"IPC$") ||
1206 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1207 DEBUG(3,("refusing IPC connection to %s\n", service));
1208 *status = NT_STATUS_ACCESS_DENIED;
1212 DEBUG(3,("%s (%s) couldn't find service %s\n",
1213 get_remote_machine_name(),
1214 client_addr(get_client_fd(),addr,sizeof(addr)),
1216 *status = NT_STATUS_BAD_NETWORK_NAME;
1220 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1221 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum) != '\0')) {
1222 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1223 "(pointing to %s)\n",
1224 service, lp_msdfs_proxy(snum)));
1225 *status = NT_STATUS_BAD_NETWORK_NAME;
1229 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1231 return make_connection_snum(sconn, snum, vuser,
1236 /****************************************************************************
1238 ****************************************************************************/
1240 void close_cnum(connection_struct *conn, uint16 vuid)
1242 file_close_conn(conn);
1244 if (!IS_IPC(conn)) {
1245 dptr_closecnum(conn);
1248 change_to_root_user();
1250 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1251 get_remote_machine_name(),
1252 conn->client_address,
1253 lp_servicename(SNUM(conn))));
1255 /* Call VFS disconnect hook */
1256 SMB_VFS_DISCONNECT(conn);
1258 yield_connection(conn, lp_servicename(SNUM(conn)));
1260 /* make sure we leave the directory available for unmount */
1261 vfs_ChDir(conn, "/");
1263 /* execute any "postexec = " line */
1264 if (*lp_postexec(SNUM(conn)) &&
1265 change_to_user(conn, vuid)) {
1266 char *cmd = talloc_sub_advanced(talloc_tos(),
1267 lp_servicename(SNUM(conn)),
1268 conn->server_info->unix_name,
1270 conn->server_info->utok.gid,
1271 conn->server_info->sanitized_username,
1272 pdb_get_domain(conn->server_info->sam_account),
1273 lp_postexec(SNUM(conn)));
1276 change_to_root_user();
1279 change_to_root_user();
1280 /* execute any "root postexec = " line */
1281 if (*lp_rootpostexec(SNUM(conn))) {
1282 char *cmd = talloc_sub_advanced(talloc_tos(),
1283 lp_servicename(SNUM(conn)),
1284 conn->server_info->unix_name,
1286 conn->server_info->utok.gid,
1287 conn->server_info->sanitized_username,
1288 pdb_get_domain(conn->server_info->sam_account),
1289 lp_rootpostexec(SNUM(conn)));