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 with lp_widelinks() instead of using
862 * lp_safe_widelinks() here so that we can correctly warn
864 if (lp_unix_extensions() && lp_widelinks(snum)) {
865 DEBUG(0,("Share '%s' has wide links and unix extensions enabled. "
866 "These parameters are incompatible. "
867 "Wide links will be disabled for this share.\n",
868 lp_servicename(snum) ));
872 * Enforce the max connections parameter.
875 if ((lp_max_connections(snum) > 0)
876 && (count_current_connections(lp_servicename(SNUM(conn)), True) >=
877 lp_max_connections(snum))) {
879 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
880 lp_max_connections(snum), lp_servicename(snum)));
882 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
887 * Get us an entry in the connections db
889 if (!claim_connection(conn, lp_servicename(snum), 0)) {
890 DEBUG(1, ("Could not store connections entry\n"));
892 *pstatus = NT_STATUS_INTERNAL_DB_ERROR;
896 /* Preexecs are done here as they might make the dir we are to ChDir
898 /* execute any "root preexec = " line */
899 if (*lp_rootpreexec(snum)) {
900 char *cmd = talloc_sub_advanced(talloc_tos(),
901 lp_servicename(SNUM(conn)),
902 conn->server_info->unix_name,
904 conn->server_info->utok.gid,
905 conn->server_info->sanitized_username,
906 pdb_get_domain(conn->server_info->sam_account),
907 lp_rootpreexec(snum));
908 DEBUG(5,("cmd=%s\n",cmd));
909 ret = smbrun(cmd,NULL);
911 if (ret != 0 && lp_rootpreexec_close(snum)) {
912 DEBUG(1,("root preexec gave %d - failing "
913 "connection\n", ret));
914 yield_connection(conn, lp_servicename(snum));
916 *pstatus = NT_STATUS_ACCESS_DENIED;
921 /* USER Activites: */
922 if (!change_to_user(conn, conn->vuid)) {
923 /* No point continuing if they fail the basic checks */
924 DEBUG(0,("Can't become connected user!\n"));
925 yield_connection(conn, lp_servicename(snum));
927 *pstatus = NT_STATUS_LOGON_FAILURE;
931 /* Remember that a different vuid can connect later without these
934 /* Preexecs are done here as they might make the dir we are to ChDir
937 /* execute any "preexec = " line */
938 if (*lp_preexec(snum)) {
939 char *cmd = talloc_sub_advanced(talloc_tos(),
940 lp_servicename(SNUM(conn)),
941 conn->server_info->unix_name,
943 conn->server_info->utok.gid,
944 conn->server_info->sanitized_username,
945 pdb_get_domain(conn->server_info->sam_account),
947 ret = smbrun(cmd,NULL);
949 if (ret != 0 && lp_preexec_close(snum)) {
950 DEBUG(1,("preexec gave %d - failing connection\n",
952 *pstatus = NT_STATUS_ACCESS_DENIED;
958 * If widelinks are disallowed we need to canonicalise the connect
959 * path here to ensure we don't have any symlinks in the
960 * connectpath. We will be checking all paths on this connection are
961 * below this directory. We must do this after the VFS init as we
962 * depend on the realpath() pointer in the vfs table. JRA.
964 if (!lp_safe_widelinks(snum)) {
965 if (!canonicalize_connect_path(conn)) {
966 DEBUG(0, ("canonicalize_connect_path failed "
967 "for service %s, path %s\n",
968 lp_servicename(snum),
970 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
975 #ifdef WITH_FAKE_KASERVER
976 if (lp_afs_share(snum)) {
981 /* Add veto/hide lists */
982 if (!IS_IPC(conn) && !IS_PRINT(conn)) {
983 set_namearray( &conn->veto_list, lp_veto_files(snum));
984 set_namearray( &conn->hide_list, lp_hide_files(snum));
985 set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(snum));
986 set_namearray( &conn->aio_write_behind_list,
987 lp_aio_write_behind(snum));
990 /* Invoke VFS make connection hook - do this before the VFS_STAT call
991 to allow any filesystems needing user credentials to initialize
994 if (SMB_VFS_CONNECT(conn, lp_servicename(snum),
995 conn->server_info->unix_name) < 0) {
996 DEBUG(0,("make_connection: VFS make connection failed!\n"));
997 *pstatus = NT_STATUS_UNSUCCESSFUL;
1001 /* Any error exit after here needs to call the disconnect hook. */
1002 on_err_call_dis_hook = true;
1004 status = create_synthetic_smb_fname(talloc_tos(), conn->connectpath,
1005 NULL, NULL, &smb_fname_cpath);
1006 if (!NT_STATUS_IS_OK(status)) {
1011 /* win2000 does not check the permissions on the directory
1012 during the tree connect, instead relying on permission
1013 check during individual operations. To match this behaviour
1014 I have disabled this chdir check (tridge) */
1015 /* the alternative is just to check the directory exists */
1016 if ((ret = SMB_VFS_STAT(conn, smb_fname_cpath)) != 0 ||
1017 !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1018 if (ret == 0 && !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
1019 DEBUG(0,("'%s' is not a directory, when connecting to "
1020 "[%s]\n", conn->connectpath,
1021 lp_servicename(snum)));
1023 DEBUG(0,("'%s' does not exist or permission denied "
1024 "when connecting to [%s] Error was %s\n",
1025 conn->connectpath, lp_servicename(snum),
1028 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1032 string_set(&conn->origpath,conn->connectpath);
1034 #if SOFTLINK_OPTIMISATION
1035 /* resolve any soft links early if possible */
1036 if (vfs_ChDir(conn,conn->connectpath) == 0) {
1037 TALLOC_CTX *ctx = talloc_tos();
1038 char *s = vfs_GetWd(ctx,s);
1040 *status = map_nt_error_from_unix(errno);
1043 if (!set_conn_connectpath(conn,s)) {
1044 *status = NT_STATUS_NO_MEMORY;
1047 vfs_ChDir(conn,conn->connectpath);
1051 /* Figure out the characteristics of the underlying filesystem. This
1052 * assumes that all the filesystem mounted withing a share path have
1053 * the same characteristics, which is likely but not guaranteed.
1056 conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn, &conn->ts_res);
1059 * Print out the 'connected as' stuff here as we need
1060 * to know the effective uid and gid we will be using
1061 * (at least initially).
1064 if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
1065 dbgtext( "%s (%s) ", get_remote_machine_name(),
1066 conn->client_address );
1067 dbgtext( "%s", srv_is_signing_active(smbd_server_conn) ? "signed " : "");
1068 dbgtext( "connect to service %s ", lp_servicename(snum) );
1069 dbgtext( "initially as user %s ",
1070 conn->server_info->unix_name );
1071 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1072 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1075 /* we've finished with the user stuff - go back to root */
1076 change_to_root_user();
1080 TALLOC_FREE(smb_fname_cpath);
1081 change_to_root_user();
1082 if (on_err_call_dis_hook) {
1083 /* Call VFS disconnect hook */
1084 SMB_VFS_DISCONNECT(conn);
1086 yield_connection(conn, lp_servicename(snum));
1091 /****************************************************************************
1092 Make a connection to a service.
1095 ****************************************************************************/
1097 connection_struct *make_connection(struct smbd_server_connection *sconn,
1098 const char *service_in, DATA_BLOB password,
1099 const char *pdev, uint16 vuid,
1103 user_struct *vuser = NULL;
1107 char addr[INET6_ADDRSTRLEN];
1111 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1113 if (!non_root_mode() && (euid = geteuid()) != 0) {
1114 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1115 "(%u)\n", (unsigned int)euid ));
1116 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1119 if (conn_num_open(sconn) > 2047) {
1120 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1124 if(lp_security() != SEC_SHARE) {
1125 vuser = get_valid_user_struct(sconn, vuid);
1127 DEBUG(1,("make_connection: refusing to connect with "
1128 "no session setup\n"));
1129 *status = NT_STATUS_ACCESS_DENIED;
1134 /* Logic to try and connect to the correct [homes] share, preferably
1135 without too many getpwnam() lookups. This is particulary nasty for
1136 winbind usernames, where the share name isn't the same as unix
1139 The snum of the homes share is stored on the vuser at session setup
1143 if (strequal(service_in,HOMES_NAME)) {
1144 if(lp_security() != SEC_SHARE) {
1145 DATA_BLOB no_pw = data_blob_null;
1146 if (vuser->homes_snum == -1) {
1147 DEBUG(2, ("[homes] share not available for "
1148 "this user because it was not found "
1149 "or created at session setup "
1151 *status = NT_STATUS_BAD_NETWORK_NAME;
1154 DEBUG(5, ("making a connection to [homes] service "
1155 "created at session setup time\n"));
1156 return make_connection_snum(sconn,
1161 /* Security = share. Try with
1162 * current_user_info.smb_name as the username. */
1163 if (*current_user_info.smb_name) {
1164 fstring unix_username;
1165 fstrcpy(unix_username,
1166 current_user_info.smb_name);
1167 map_username(sconn, unix_username);
1168 snum = find_service(unix_username);
1171 DEBUG(5, ("making a connection to 'homes' "
1172 "service %s based on "
1173 "security=share\n", service_in));
1174 return make_connection_snum(sconn,
1180 } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
1181 && strequal(service_in,
1182 lp_servicename(vuser->homes_snum))) {
1183 DATA_BLOB no_pw = data_blob_null;
1184 DEBUG(5, ("making a connection to 'homes' service [%s] "
1185 "created at session setup time\n", service_in));
1186 return make_connection_snum(sconn,
1192 fstrcpy(service, service_in);
1194 strlower_m(service);
1196 snum = find_service(service);
1199 if (strequal(service,"IPC$") ||
1200 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1201 DEBUG(3,("refusing IPC connection to %s\n", service));
1202 *status = NT_STATUS_ACCESS_DENIED;
1206 DEBUG(3,("%s (%s) couldn't find service %s\n",
1207 get_remote_machine_name(),
1208 client_addr(get_client_fd(),addr,sizeof(addr)),
1210 *status = NT_STATUS_BAD_NETWORK_NAME;
1214 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1215 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum) != '\0')) {
1216 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1217 "(pointing to %s)\n",
1218 service, lp_msdfs_proxy(snum)));
1219 *status = NT_STATUS_BAD_NETWORK_NAME;
1223 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1225 return make_connection_snum(sconn, snum, vuser,
1230 /****************************************************************************
1232 ****************************************************************************/
1234 void close_cnum(connection_struct *conn, uint16 vuid)
1236 file_close_conn(conn);
1238 if (!IS_IPC(conn)) {
1239 dptr_closecnum(conn);
1242 change_to_root_user();
1244 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1245 get_remote_machine_name(),
1246 conn->client_address,
1247 lp_servicename(SNUM(conn))));
1249 /* Call VFS disconnect hook */
1250 SMB_VFS_DISCONNECT(conn);
1252 yield_connection(conn, lp_servicename(SNUM(conn)));
1254 /* make sure we leave the directory available for unmount */
1255 vfs_ChDir(conn, "/");
1257 /* execute any "postexec = " line */
1258 if (*lp_postexec(SNUM(conn)) &&
1259 change_to_user(conn, vuid)) {
1260 char *cmd = talloc_sub_advanced(talloc_tos(),
1261 lp_servicename(SNUM(conn)),
1262 conn->server_info->unix_name,
1264 conn->server_info->utok.gid,
1265 conn->server_info->sanitized_username,
1266 pdb_get_domain(conn->server_info->sam_account),
1267 lp_postexec(SNUM(conn)));
1270 change_to_root_user();
1273 change_to_root_user();
1274 /* execute any "root postexec = " line */
1275 if (*lp_rootpostexec(SNUM(conn))) {
1276 char *cmd = talloc_sub_advanced(talloc_tos(),
1277 lp_servicename(SNUM(conn)),
1278 conn->server_info->unix_name,
1280 conn->server_info->utok.gid,
1281 conn->server_info->sanitized_username,
1282 pdb_get_domain(conn->server_info->sam_account),
1283 lp_rootpostexec(SNUM(conn)));