2 Unix SMB/CIFS implementation.
3 service (connection) opening and closing
4 Copyright (C) Andrew Tridgell 1992-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 extern userdom_struct current_user_info;
24 static bool canonicalize_connect_path(connection_struct *conn)
26 #ifdef REALPATH_TAKES_NULL
28 char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath,NULL);
32 ret = set_conn_connectpath(conn,resolved_name);
33 SAFE_FREE(resolved_name);
36 char resolved_name_buf[PATH_MAX+1];
37 char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath,resolved_name_buf);
41 return set_conn_connectpath(conn,resolved_name);
42 #endif /* REALPATH_TAKES_NULL */
45 /****************************************************************************
46 Ensure when setting connectpath it is a canonicalized (no ./ // or ../)
47 absolute path stating in / and not ending in /.
48 Observent people will notice a similarity between this and check_path_syntax :-).
49 ****************************************************************************/
51 bool set_conn_connectpath(connection_struct *conn, const char *connectpath)
55 const char *s = connectpath;
56 bool start_of_name_component = true;
58 destname = SMB_STRDUP(connectpath);
64 *d++ = '/'; /* Always start with root. */
68 /* Eat multiple '/' */
72 if ((d > destname + 1) && (*s != '\0')) {
75 start_of_name_component = True;
79 if (start_of_name_component) {
80 if ((s[0] == '.') && (s[1] == '.') && (s[2] == '/' || s[2] == '\0')) {
81 /* Uh oh - "/../" or "/..\0" ! */
83 /* Go past the ../ or .. */
87 s += 2; /* Go past the .. */
90 /* If we just added a '/' - delete it */
91 if ((d > destname) && (*(d-1) == '/')) {
96 /* Are we at the start ? Can't go back further if so. */
98 *d++ = '/'; /* Can't delete root */
101 /* Go back one level... */
102 /* Decrement d first as d points to the *next* char to write into. */
103 for (d--; d > destname; d--) {
108 /* We're still at the start of a name component, just the previous one. */
110 } else if ((s[0] == '.') && ((s[1] == '\0') || s[1] == '/')) {
111 /* Component of pathname can't be "." only - skip the '.' . */
125 /* Get the size of the next MB character. */
126 next_codepoint(s,&siz);
147 start_of_name_component = false;
151 /* And must not end in '/' */
152 if (d > destname + 1 && (*(d-1) == '/')) {
156 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
157 lp_servicename(SNUM(conn)), destname ));
159 string_set(&conn->connectpath, destname);
164 /****************************************************************************
165 Load parameters specific to a connection/service.
166 ****************************************************************************/
168 bool set_current_service(connection_struct *conn, uint16 flags, bool do_chdir)
170 static connection_struct *last_conn;
171 static uint16 last_flags;
179 conn->lastused_count++;
184 vfs_ChDir(conn,conn->connectpath) != 0 &&
185 vfs_ChDir(conn,conn->origpath) != 0) {
186 DEBUG(0,("chdir (%s) failed\n",
191 if ((conn == last_conn) && (last_flags == flags)) {
198 /* Obey the client case sensitivity requests - only for clients that support it. */
199 switch (lp_casesensitive(snum)) {
202 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
203 enum remote_arch_types ra_type = get_remote_arch();
204 if ((ra_type != RA_SAMBA) && (ra_type != RA_CIFSFS)) {
205 /* Client can't support per-packet case sensitive pathnames. */
206 conn->case_sensitive = False;
208 conn->case_sensitive = !(flags & FLAG_CASELESS_PATHNAMES);
213 conn->case_sensitive = True;
216 conn->case_sensitive = False;
222 static int load_registry_service(const char *servicename)
224 struct registry_key *key;
230 struct registry_value *value;
234 if (!lp_registry_shares()) {
238 if (strequal(servicename, GLOBAL_NAME)) {
242 if (asprintf(&path, "%s\\%s", KEY_SMBCONF, servicename) == -1) {
246 err = reg_open_path(NULL, path, REG_KEY_READ, get_root_nt_token(),
250 if (!W_ERROR_IS_OK(err)) {
254 res = lp_add_service(servicename, -1);
260 W_ERROR_IS_OK(reg_enumvalue(key, key, i, &value_name, &value));
262 switch (value->type) {
265 if (asprintf(&tmp, "%d", value->v.dword) == -1) {
268 lp_do_parameter(res, value_name, tmp);
273 lp_do_parameter(res, value_name, value->v.sz.str);
277 /* Ignore all the rest */
281 TALLOC_FREE(value_name);
291 void load_registry_shares(void)
293 struct registry_key *key;
298 DEBUG(8, ("load_registry_shares()\n"));
299 if (!lp_registry_shares()) {
303 err = reg_open_path(NULL, KEY_SMBCONF, REG_KEY_READ,
304 get_root_nt_token(), &key);
305 if (!(W_ERROR_IS_OK(err))) {
309 for (i=0; W_ERROR_IS_OK(reg_enumkey(key, key, i, &name, NULL)); i++) {
310 load_registry_service(name);
318 /****************************************************************************
319 Add a home service. Returns the new service number or -1 if fail.
320 ****************************************************************************/
322 int add_home_service(const char *service, const char *username, const char *homedir)
326 if (!service || !homedir)
329 if ((iHomeService = lp_servicenumber(HOMES_NAME)) < 0) {
330 if ((iHomeService = load_registry_service(HOMES_NAME)) < 0) {
336 * If this is a winbindd provided username, remove
337 * the domain component before adding the service.
338 * Log a warning if the "path=" parameter does not
339 * include any macros.
343 const char *p = strchr(service,*lp_winbind_separator());
345 /* We only want the 'user' part of the string */
351 if (!lp_add_home(service, iHomeService, username, homedir)) {
355 return lp_servicenumber(service);
360 * Find a service entry.
362 * @param service is modified (to canonical form??)
365 int find_service(fstring service)
369 all_string_sub(service,"\\","/",0);
371 iService = lp_servicenumber(service);
373 /* now handle the special case of a home directory */
375 char *phome_dir = get_user_home_dir(talloc_tos(), service);
379 * Try mapping the servicename, it may
380 * be a Windows to unix mapped user name.
382 if(map_username(service))
383 phome_dir = get_user_home_dir(
384 talloc_tos(), service);
387 DEBUG(3,("checking for home directory %s gave %s\n",service,
388 phome_dir?phome_dir:"(NULL)"));
390 iService = add_home_service(service,service /* 'username' */, phome_dir);
393 /* If we still don't have a service, attempt to add it as a printer. */
397 if ((iPrinterService = lp_servicenumber(PRINTERS_NAME)) < 0) {
398 iPrinterService = load_registry_service(PRINTERS_NAME);
400 if (iPrinterService) {
401 DEBUG(3,("checking whether %s is a valid printer name...\n", service));
402 if (pcap_printername_ok(service)) {
403 DEBUG(3,("%s is a valid printer name\n", service));
404 DEBUG(3,("adding %s as a printer service\n", service));
405 lp_add_printer(service, iPrinterService);
406 iService = lp_servicenumber(service);
408 DEBUG(0,("failed to add %s as a printer service!\n", service));
411 DEBUG(3,("%s is not a valid printer name\n", service));
416 /* Check for default vfs service? Unsure whether to implement this */
421 iService = load_registry_service(service);
424 /* Is it a usershare service ? */
425 if (iService < 0 && *lp_usershare_path()) {
426 /* Ensure the name is canonicalized. */
428 iService = load_usershare_service(service);
431 /* just possibly it's a default service? */
433 char *pdefservice = lp_defaultservice();
434 if (pdefservice && *pdefservice && !strequal(pdefservice,service) && !strstr_m(service,"..")) {
436 * We need to do a local copy here as lp_defaultservice()
437 * returns one of the rotating lp_string buffers that
438 * could get overwritten by the recursive find_service() call
439 * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
441 char *defservice = SMB_STRDUP(pdefservice);
447 /* Disallow anything except explicit share names. */
448 if (strequal(defservice,HOMES_NAME) ||
449 strequal(defservice, PRINTERS_NAME) ||
450 strequal(defservice, "IPC$")) {
451 SAFE_FREE(defservice);
455 iService = find_service(defservice);
457 all_string_sub(service, "_","/",0);
458 iService = lp_add_service(service, iService);
460 SAFE_FREE(defservice);
465 if (!VALID_SNUM(iService)) {
466 DEBUG(0,("Invalid snum %d for %s\n",iService, service));
474 DEBUG(3,("find_service() failed to find service %s\n", service));
480 /****************************************************************************
481 do some basic sainity checks on the share.
482 This function modifies dev, ecode.
483 ****************************************************************************/
485 static NTSTATUS share_sanity_checks(int snum, fstring dev)
488 if (!lp_snum_ok(snum) ||
489 !check_access(smbd_server_fd(),
490 lp_hostsallow(snum), lp_hostsdeny(snum))) {
491 return NT_STATUS_ACCESS_DENIED;
494 if (dev[0] == '?' || !dev[0]) {
495 if (lp_print_ok(snum)) {
496 fstrcpy(dev,"LPT1:");
497 } else if (strequal(lp_fstype(snum), "IPC")) {
506 if (lp_print_ok(snum)) {
507 if (!strequal(dev, "LPT1:")) {
508 return NT_STATUS_BAD_DEVICE_TYPE;
510 } else if (strequal(lp_fstype(snum), "IPC")) {
511 if (!strequal(dev, "IPC")) {
512 return NT_STATUS_BAD_DEVICE_TYPE;
514 } else if (!strequal(dev, "A:")) {
515 return NT_STATUS_BAD_DEVICE_TYPE;
518 /* Behave as a printer if we are supposed to */
519 if (lp_print_ok(snum) && (strcmp(dev, "A:") == 0)) {
520 fstrcpy(dev, "LPT1:");
527 * Go through lookup_name etc to find the force'd group.
529 * Create a new token from src_token, replacing the primary group sid with the
533 static NTSTATUS find_forced_group(bool force_user,
534 int snum, const char *username,
538 NTSTATUS result = NT_STATUS_NO_SUCH_GROUP;
539 TALLOC_CTX *frame = talloc_stackframe();
541 enum lsa_SidType type;
543 bool user_must_be_member = False;
546 groupname = talloc_strdup(talloc_tos(), lp_force_group(snum));
547 if (groupname == NULL) {
548 DEBUG(1, ("talloc_strdup failed\n"));
549 result = NT_STATUS_NO_MEMORY;
553 if (groupname[0] == '+') {
554 user_must_be_member = True;
558 groupname = talloc_string_sub(talloc_tos(), groupname,
559 "%S", lp_servicename(snum));
560 if (groupname == NULL) {
561 DEBUG(1, ("talloc_string_sub failed\n"));
562 result = NT_STATUS_NO_MEMORY;
566 if (!lookup_name_smbconf(talloc_tos(), groupname,
567 LOOKUP_NAME_ALL|LOOKUP_NAME_GROUP,
568 NULL, NULL, &group_sid, &type)) {
569 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
574 if ((type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) &&
575 (type != SID_NAME_WKN_GRP)) {
576 DEBUG(10, ("%s is a %s, not a group\n", groupname,
577 sid_type_lookup(type)));
581 if (!sid_to_gid(&group_sid, &gid)) {
582 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
583 sid_string_dbg(&group_sid), groupname));
588 * If the user has been forced and the forced group starts with a '+',
589 * then we only set the group to be the forced group if the forced
590 * user is a member of that group. Otherwise, the meaning of the '+'
594 if (force_user && user_must_be_member) {
595 if (user_in_group_sid(username, &group_sid)) {
596 sid_copy(pgroup_sid, &group_sid);
598 DEBUG(3,("Forced group %s for member %s\n",
599 groupname, username));
601 DEBUG(0,("find_forced_group: forced user %s is not a member "
602 "of forced group %s. Disallowing access.\n",
603 username, groupname ));
604 result = NT_STATUS_MEMBER_NOT_IN_GROUP;
608 sid_copy(pgroup_sid, &group_sid);
610 DEBUG(3,("Forced group %s\n", groupname));
613 result = NT_STATUS_OK;
619 /****************************************************************************
620 Create an auth_serversupplied_info structure for a connection_struct
621 ****************************************************************************/
623 static NTSTATUS create_connection_server_info(TALLOC_CTX *mem_ctx, int snum,
624 struct auth_serversupplied_info *vuid_serverinfo,
626 struct auth_serversupplied_info **presult)
628 if (lp_guest_only(snum)) {
629 return make_server_info_guest(mem_ctx, presult);
632 if (vuid_serverinfo != NULL) {
634 struct auth_serversupplied_info *result;
637 * This is the normal security != share case where we have a
638 * valid vuid from the session setup. */
640 if (vuid_serverinfo->guest) {
641 if (!lp_guest_ok(snum)) {
642 DEBUG(2, ("guest user (from session setup) "
643 "not permitted to access this share "
644 "(%s)\n", lp_servicename(snum)));
645 return NT_STATUS_ACCESS_DENIED;
648 if (!user_ok_token(vuid_serverinfo->unix_name,
649 vuid_serverinfo->ptok, snum)) {
650 DEBUG(2, ("user '%s' (from session setup) not "
651 "permitted to access this share "
653 vuid_serverinfo->unix_name,
654 lp_servicename(snum)));
655 return NT_STATUS_ACCESS_DENIED;
659 result = copy_serverinfo(mem_ctx, vuid_serverinfo);
660 if (result == NULL) {
661 return NT_STATUS_NO_MEMORY;
668 if (lp_security() == SEC_SHARE) {
673 /* add the sharename as a possible user name if we
674 are in share mode security */
676 add_session_user(lp_servicename(snum));
678 /* shall we let them in? */
680 if (!authorise_login(snum,user,password,&guest)) {
681 DEBUG( 2, ( "Invalid username/password for [%s]\n",
682 lp_servicename(snum)) );
683 return NT_STATUS_WRONG_PASSWORD;
686 return make_serverinfo_from_username(mem_ctx, user, guest,
690 DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
691 return NT_STATUS_ACCESS_DENIED;
695 /****************************************************************************
696 Make a connection, given the snum to connect to, and the vuser of the
697 connecting user if appropriate.
698 ****************************************************************************/
700 static connection_struct *make_connection_snum(int snum, user_struct *vuser,
705 connection_struct *conn;
709 char addr[INET6_ADDRSTRLEN];
710 bool on_err_call_dis_hook = false;
714 SET_STAT_INVALID(st);
716 if (NT_STATUS_IS_ERR(*pstatus = share_sanity_checks(snum, dev))) {
722 DEBUG(0,("Couldn't find free connection.\n"));
723 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
727 conn->params->service = snum;
729 status = create_connection_server_info(
730 conn, snum, vuser ? vuser->server_info : NULL, password,
733 if (!NT_STATUS_IS_OK(status)) {
734 DEBUG(0, ("create_connection_server_info failed: %s\n",
741 if ((lp_guest_only(snum)) || (lp_security() == SEC_SHARE)) {
742 conn->force_user = true;
745 add_session_user(conn->server_info->unix_name);
747 safe_strcpy(conn->client_address,
748 client_addr(get_client_fd(),addr,sizeof(addr)),
749 sizeof(conn->client_address)-1);
750 conn->num_files_open = 0;
751 conn->lastused = conn->lastused_count = time(NULL);
753 conn->printer = (strncmp(dev,"LPT",3) == 0);
754 conn->ipc = ( (strncmp(dev,"IPC",3) == 0) ||
755 ( lp_enable_asu_support() && strequal(dev,"ADMIN$")) );
758 /* Case options for the share. */
759 if (lp_casesensitive(snum) == Auto) {
760 /* We will be setting this per packet. Set to be case
761 * insensitive for now. */
762 conn->case_sensitive = False;
764 conn->case_sensitive = (bool)lp_casesensitive(snum);
767 conn->case_preserve = lp_preservecase(snum);
768 conn->short_case_preserve = lp_shortpreservecase(snum);
770 conn->encrypt_level = lp_smb_encrypt(snum);
772 conn->veto_list = NULL;
773 conn->hide_list = NULL;
774 conn->veto_oplock_list = NULL;
775 conn->aio_write_behind_list = NULL;
776 string_set(&conn->dirpath,"");
778 conn->read_only = lp_readonly(SNUM(conn));
779 conn->admin_user = False;
781 if (*lp_force_user(snum)) {
784 * Replace conn->server_info with a completely faked up one
785 * from the username we are forced into :-)
789 struct auth_serversupplied_info *forced_serverinfo;
791 fuser = talloc_string_sub(conn, lp_force_user(snum), "%S",
792 lp_servicename(snum));
795 *pstatus = NT_STATUS_NO_MEMORY;
799 status = make_serverinfo_from_username(
800 conn, fuser, conn->server_info->guest,
802 if (!NT_STATUS_IS_OK(status)) {
808 TALLOC_FREE(conn->server_info);
809 conn->server_info = forced_serverinfo;
811 conn->force_user = True;
812 DEBUG(3,("Forced user %s\n", fuser));
816 * If force group is true, then override
817 * any groupid stored for the connecting user.
820 if (*lp_force_group(snum)) {
822 status = find_forced_group(
823 conn->force_user, snum, conn->user,
824 &conn->server_info->ptok->user_sids[1],
825 &conn->server_info->gid);
827 if (!NT_STATUS_IS_OK(status)) {
834 conn->vuid = (vuser != NULL) ? vuser->vuid : UID_FIELD_INVALID;
836 conn->uid = conn->server_info->uid;
837 conn->gid = conn->server_info->gid;
838 string_set(&conn->user, conn->server_info->unix_name);
841 char *s = talloc_sub_advanced(talloc_tos(),
842 lp_servicename(SNUM(conn)), conn->user,
843 conn->connectpath, conn->gid,
844 get_current_username(),
845 current_user_info.domain,
849 *pstatus = NT_STATUS_NO_MEMORY;
853 if (!set_conn_connectpath(conn,s)) {
856 *pstatus = NT_STATUS_NO_MEMORY;
859 DEBUG(3,("Connect path is '%s' for service [%s]\n",s,
860 lp_servicename(snum)));
865 * New code to check if there's a share security descripter
866 * added from NT server manager. This is done after the
867 * smb.conf checks are done as we need a uid and token. JRA.
872 bool can_write = False;
874 can_write = share_access_check(conn->server_info->ptok,
875 lp_servicename(snum),
879 if (!share_access_check(conn->server_info->ptok,
880 lp_servicename(snum),
882 /* No access, read or write. */
883 DEBUG(0,("make_connection: connection to %s "
884 "denied due to security "
886 lp_servicename(snum)));
888 *pstatus = NT_STATUS_ACCESS_DENIED;
891 conn->read_only = True;
895 /* Initialise VFS function pointers */
897 if (!smbd_vfs_init(conn)) {
898 DEBUG(0, ("vfs_init failed for service %s\n",
899 lp_servicename(snum)));
901 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
906 * If widelinks are disallowed we need to canonicalise the connect
907 * path here to ensure we don't have any symlinks in the
908 * connectpath. We will be checking all paths on this connection are
909 * below this directory. We must do this after the VFS init as we
910 * depend on the realpath() pointer in the vfs table. JRA.
912 if (!lp_widelinks(snum)) {
913 if (!canonicalize_connect_path(conn)) {
914 DEBUG(0, ("canonicalize_connect_path failed "
915 "for service %s, path %s\n",
916 lp_servicename(snum),
919 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
924 if ((!conn->printer) && (!conn->ipc)) {
925 conn->notify_ctx = notify_init(conn, server_id_self(),
926 smbd_messaging_context(),
927 smbd_event_context(),
931 /* ROOT Activities: */
933 * Enforce the max connections parameter.
936 if ((lp_max_connections(snum) > 0)
937 && (count_current_connections(lp_servicename(SNUM(conn)), True) >=
938 lp_max_connections(snum))) {
940 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
941 lp_max_connections(snum), lp_servicename(snum)));
943 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
948 * Get us an entry in the connections db
950 if (!claim_connection(conn, lp_servicename(snum), 0)) {
951 DEBUG(1, ("Could not store connections entry\n"));
953 *pstatus = NT_STATUS_INTERNAL_DB_ERROR;
957 /* Preexecs are done here as they might make the dir we are to ChDir
959 /* execute any "root preexec = " line */
960 if (*lp_rootpreexec(snum)) {
961 char *cmd = talloc_sub_advanced(talloc_tos(),
962 lp_servicename(SNUM(conn)), conn->user,
963 conn->connectpath, conn->gid,
964 get_current_username(),
965 current_user_info.domain,
966 lp_rootpreexec(snum));
967 DEBUG(5,("cmd=%s\n",cmd));
968 ret = smbrun(cmd,NULL);
970 if (ret != 0 && lp_rootpreexec_close(snum)) {
971 DEBUG(1,("root preexec gave %d - failing "
972 "connection\n", ret));
973 yield_connection(conn, lp_servicename(snum));
975 *pstatus = NT_STATUS_ACCESS_DENIED;
980 /* USER Activites: */
981 if (!change_to_user(conn, conn->vuid)) {
982 /* No point continuing if they fail the basic checks */
983 DEBUG(0,("Can't become connected user!\n"));
984 yield_connection(conn, lp_servicename(snum));
986 *pstatus = NT_STATUS_LOGON_FAILURE;
990 /* Remember that a different vuid can connect later without these
993 /* Preexecs are done here as they might make the dir we are to ChDir
996 /* execute any "preexec = " line */
997 if (*lp_preexec(snum)) {
998 char *cmd = talloc_sub_advanced(talloc_tos(),
999 lp_servicename(SNUM(conn)), conn->user,
1000 conn->connectpath, conn->gid,
1001 get_current_username(),
1002 current_user_info.domain,
1004 ret = smbrun(cmd,NULL);
1006 if (ret != 0 && lp_preexec_close(snum)) {
1007 DEBUG(1,("preexec gave %d - failing connection\n",
1009 *pstatus = NT_STATUS_ACCESS_DENIED;
1014 #ifdef WITH_FAKE_KASERVER
1015 if (lp_afs_share(snum)) {
1020 /* Add veto/hide lists */
1021 if (!IS_IPC(conn) && !IS_PRINT(conn)) {
1022 set_namearray( &conn->veto_list, lp_veto_files(snum));
1023 set_namearray( &conn->hide_list, lp_hide_files(snum));
1024 set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(snum));
1027 /* Invoke VFS make connection hook - do this before the VFS_STAT call
1028 to allow any filesystems needing user credentials to initialize
1031 if (SMB_VFS_CONNECT(conn, lp_servicename(snum), conn->user) < 0) {
1032 DEBUG(0,("make_connection: VFS make connection failed!\n"));
1033 *pstatus = NT_STATUS_UNSUCCESSFUL;
1037 /* Any error exit after here needs to call the disconnect hook. */
1038 on_err_call_dis_hook = true;
1040 /* win2000 does not check the permissions on the directory
1041 during the tree connect, instead relying on permission
1042 check during individual operations. To match this behaviour
1043 I have disabled this chdir check (tridge) */
1044 /* the alternative is just to check the directory exists */
1045 if ((ret = SMB_VFS_STAT(conn, conn->connectpath, &st)) != 0 ||
1046 !S_ISDIR(st.st_mode)) {
1047 if (ret == 0 && !S_ISDIR(st.st_mode)) {
1048 DEBUG(0,("'%s' is not a directory, when connecting to "
1049 "[%s]\n", conn->connectpath,
1050 lp_servicename(snum)));
1052 DEBUG(0,("'%s' does not exist or permission denied "
1053 "when connecting to [%s] Error was %s\n",
1054 conn->connectpath, lp_servicename(snum),
1057 *pstatus = NT_STATUS_BAD_NETWORK_NAME;
1061 string_set(&conn->origpath,conn->connectpath);
1063 #if SOFTLINK_OPTIMISATION
1064 /* resolve any soft links early if possible */
1065 if (vfs_ChDir(conn,conn->connectpath) == 0) {
1066 TALLOC_CTX *ctx = talloc_tos();
1067 char *s = vfs_GetWd(ctx,s);
1069 *status = map_nt_error_from_unix(errno);
1072 if (!set_conn_connectpath(conn,s)) {
1073 *status = NT_STATUS_NO_MEMORY;
1076 vfs_ChDir(conn,conn->connectpath);
1080 /* Figure out the characteristics of the underlying filesystem. This
1081 * assumes that all the filesystem mounted withing a share path have
1082 * the same characteristics, which is likely but not guaranteed.
1085 conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn);
1088 * Print out the 'connected as' stuff here as we need
1089 * to know the effective uid and gid we will be using
1090 * (at least initially).
1093 if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
1094 dbgtext( "%s (%s) ", get_remote_machine_name(),
1095 conn->client_address );
1096 dbgtext( "%s", srv_is_signing_active() ? "signed " : "");
1097 dbgtext( "connect to service %s ", lp_servicename(snum) );
1098 dbgtext( "initially as user %s ", conn->user );
1099 dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
1100 dbgtext( "(pid %d)\n", (int)sys_getpid() );
1103 /* we've finished with the user stuff - go back to root */
1104 change_to_root_user();
1109 change_to_root_user();
1110 if (on_err_call_dis_hook) {
1111 /* Call VFS disconnect hook */
1112 SMB_VFS_DISCONNECT(conn);
1114 yield_connection(conn, lp_servicename(snum));
1119 /***************************************************************************************
1120 Simple wrapper function for make_connection() to include a call to
1122 **************************************************************************************/
1124 connection_struct *make_connection_with_chdir(const char *service_in,
1126 const char *dev, uint16 vuid,
1129 connection_struct *conn = NULL;
1131 conn = make_connection(service_in, password, dev, vuid, status);
1134 * make_connection() does not change the directory for us any more
1135 * so we have to do it as a separate step --jerry
1138 if ( conn && vfs_ChDir(conn,conn->connectpath) != 0 ) {
1139 DEBUG(0,("move_driver_to_download_area: Can't change "
1140 "directory to %s for [print$] (%s)\n",
1141 conn->connectpath,strerror(errno)));
1142 yield_connection(conn, lp_servicename(SNUM(conn)));
1144 *status = NT_STATUS_UNSUCCESSFUL;
1151 /****************************************************************************
1152 Make a connection to a service.
1155 ****************************************************************************/
1157 connection_struct *make_connection(const char *service_in, DATA_BLOB password,
1158 const char *pdev, uint16 vuid,
1162 user_struct *vuser = NULL;
1166 char addr[INET6_ADDRSTRLEN];
1170 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1172 if (!non_root_mode() && (euid = geteuid()) != 0) {
1173 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1174 "(%u)\n", (unsigned int)euid ));
1175 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1178 if (conn_num_open() > 2047) {
1179 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1183 if(lp_security() != SEC_SHARE) {
1184 vuser = get_valid_user_struct(vuid);
1186 DEBUG(1,("make_connection: refusing to connect with "
1187 "no session setup\n"));
1188 *status = NT_STATUS_ACCESS_DENIED;
1193 /* Logic to try and connect to the correct [homes] share, preferably
1194 without too many getpwnam() lookups. This is particulary nasty for
1195 winbind usernames, where the share name isn't the same as unix
1198 The snum of the homes share is stored on the vuser at session setup
1202 if (strequal(service_in,HOMES_NAME)) {
1203 if(lp_security() != SEC_SHARE) {
1204 DATA_BLOB no_pw = data_blob_null;
1205 if (vuser->homes_snum == -1) {
1206 DEBUG(2, ("[homes] share not available for "
1207 "this user because it was not found "
1208 "or created at session setup "
1210 *status = NT_STATUS_BAD_NETWORK_NAME;
1213 DEBUG(5, ("making a connection to [homes] service "
1214 "created at session setup time\n"));
1215 return make_connection_snum(vuser->homes_snum,
1219 /* Security = share. Try with
1220 * current_user_info.smb_name as the username. */
1221 if (*current_user_info.smb_name) {
1222 fstring unix_username;
1223 fstrcpy(unix_username,
1224 current_user_info.smb_name);
1225 map_username(unix_username);
1226 snum = find_service(unix_username);
1229 DEBUG(5, ("making a connection to 'homes' "
1230 "service %s based on "
1231 "security=share\n", service_in));
1232 return make_connection_snum(snum, NULL,
1237 } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
1238 && strequal(service_in,
1239 lp_servicename(vuser->homes_snum))) {
1240 DATA_BLOB no_pw = data_blob_null;
1241 DEBUG(5, ("making a connection to 'homes' service [%s] "
1242 "created at session setup time\n", service_in));
1243 return make_connection_snum(vuser->homes_snum,
1248 fstrcpy(service, service_in);
1250 strlower_m(service);
1252 snum = find_service(service);
1255 if (strequal(service,"IPC$") ||
1256 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1257 DEBUG(3,("refusing IPC connection to %s\n", service));
1258 *status = NT_STATUS_ACCESS_DENIED;
1262 DEBUG(0,("%s (%s) couldn't find service %s\n",
1263 get_remote_machine_name(),
1264 client_addr(get_client_fd(),addr,sizeof(addr)),
1266 *status = NT_STATUS_BAD_NETWORK_NAME;
1270 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1271 if (lp_host_msdfs() && (*lp_msdfs_proxy(snum) != '\0')) {
1272 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1273 "(pointing to %s)\n",
1274 service, lp_msdfs_proxy(snum)));
1275 *status = NT_STATUS_BAD_NETWORK_NAME;
1279 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1281 return make_connection_snum(snum, vuser,
1286 /****************************************************************************
1288 ****************************************************************************/
1290 void close_cnum(connection_struct *conn, uint16 vuid)
1293 pipe_close_conn(conn);
1295 file_close_conn(conn);
1296 dptr_closecnum(conn);
1299 change_to_root_user();
1301 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1302 get_remote_machine_name(),
1303 conn->client_address,
1304 lp_servicename(SNUM(conn))));
1306 /* Call VFS disconnect hook */
1307 SMB_VFS_DISCONNECT(conn);
1309 yield_connection(conn, lp_servicename(SNUM(conn)));
1311 /* make sure we leave the directory available for unmount */
1312 vfs_ChDir(conn, "/");
1314 /* execute any "postexec = " line */
1315 if (*lp_postexec(SNUM(conn)) &&
1316 change_to_user(conn, vuid)) {
1317 char *cmd = talloc_sub_advanced(talloc_tos(),
1318 lp_servicename(SNUM(conn)), conn->user,
1319 conn->connectpath, conn->gid,
1320 get_current_username(),
1321 current_user_info.domain,
1322 lp_postexec(SNUM(conn)));
1325 change_to_root_user();
1328 change_to_root_user();
1329 /* execute any "root postexec = " line */
1330 if (*lp_rootpostexec(SNUM(conn))) {
1331 char *cmd = talloc_sub_advanced(talloc_tos(),
1332 lp_servicename(SNUM(conn)), conn->user,
1333 conn->connectpath, conn->gid,
1334 get_current_username(),
1335 current_user_info.domain,
1336 lp_rootpostexec(SNUM(conn)));